Powered by Deep Web Technologies
Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Induction of Methyl Tertiary Butyl Ether (MTBE)-Oxidizing Activity in Mycobacterium vaccae JOB5 by MTBE  

Science Journals Connector (OSTI)

...directly from the culture vessels. In experiments that followed...time course of organic acid consumption as well as MTBE oxidation...determine the extent of MTBE consumption and the accumulation of TBA...detectable growth or MTBE consumption occurred when cells were incubated...

Erika L. Johnson; Christy A. Smith; Kirk T. O'Reilly; Michael R. Hyman

2004-02-01T23:59:59.000Z

2

State Restrictions on Methyl Tertiary Butyl Ether (released in AEO2006)  

Reports and Publications (EIA)

By the end of 2005, 25 states had barred, or passed laws banning, any more than trace levels of methyl tertiary butyl ether (MTBE) in their gasoline supplies, and legislation to ban MTBE was pending in 4 others. Some state laws address only MTBE; others also address ethers such as ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether (TAME). Annual Energy Outlook 2006 assumes that all state MTBE bans prohibit the use of all ethers for gasoline blending.

2006-01-01T23:59:59.000Z

3

MTBE Production Economics (Released in the STEO April 2001)  

Reports and Publications (EIA)

The purpose of this analysis is to evaluate the causes of methyl tertiary butyl ether (MTBE) price increases in 2000.

2001-01-01T23:59:59.000Z

4

MTBE Production Economics  

Gasoline and Diesel Fuel Update (EIA)

MTBE Production MTBE Production Economics Tancred C. M. Lidderdale Contents 1. Summary 2. MTBE Production Costs 3. Relationship between price of MTBE and Reformulated Gasoline 4. Influence of Natural Gas Prices on the Gasoline Market 5. Regression Results 6. Data Sources 7. End Notes 1. Summary Last year the price of MTBE (methyl tertiary butyl ether) increased dramatically on two occasions (Figure 1) (see Data Sources at end of article.): 1. Between April and June 2000, the price (U.S. Gulf Coast waterborne market) of MTBE rose from $1.00 per gallon to over $1.60 per gallon. This represented an increase in the price premium for MTBE over the wholesale price of conventional gasoline from its normal (1995 though 2000 average) $0.26 per gallon to $0.60 per gallon. The MTBE

5

MTBE, Oxygenates, and Motor Gasoline  

Gasoline and Diesel Fuel Update (EIA)

MTBE, Oxygenates, and MTBE, Oxygenates, and Motor Gasoline Contents * Introduction * Federal gasoline product quality regulations * What are oxygenates? * Who gets gasoline with oxygenates? * Which areas get MTBE? * How much has been invested in MTBE production capacity? * What does new Ethanol capacity cost? * What would an MTBE ban cost? * On-line information resources * Endnotes * Summary of revisions to this analysis Introduction The blending of methyl tertiary butyl ether (MTBE) into motor gasoline has increased dramatically since it was first produced 20 years ago. MTBE usage grew in the early 1980's in response to octane demand resulting initially from the phaseout of lead from gasoline and later from rising demand for premium gasoline. The oxygenated gasoline program stimulated an

6

Drinking Water Problems: MTBE  

E-Print Network (OSTI)

Methyl tertiary-butyl ether, a gasoline additive commonly known as MTBE, can contaminate ground water and cause health problems for those exposed to it for a long time. However, filtering devices can remove this and other additives from well water...

Dozier, Monty; Lesikar, Bruce J.

2008-08-28T23:59:59.000Z

7

IDENTIFYING THE USAGE PATTERNS OF METHYL TERT-BUTYL ETHER (MTBE) AND OTHER OXYGENATES IN GASOLINE USING GASOLINE  

E-Print Network (OSTI)

IDENTIFYING THE USAGE PATTERNS OF METHYL TERT-BUTYL ETHER (MTBE) AND OTHER OXYGENATES IN GASOLINE USING GASOLINE SURVEYS By Michael J. Moran, Rick M. Clawges, and John S. Zogorski U.S. Geological Survey 1608 Mt. View Rapid City, SD 57702 Methyl tert-butyl ether (MTBE) is commonly added to gasoline

8

UMass builds bugs to eat MTBE ByAuriaCimino  

E-Print Network (OSTI)

a toxic gasoline component might be just what the doctor ordered for Maine's con- taminated groundwater with methyl tertiary butyl ether (MTBE), which is found in gasoline. Once the first field trial is complete out of the reformulated gasoline pro- gram (RFG) .The gasoline, which con- tains 11 percent MTBE

Lovley, Derek

9

Status and Impact of State MTBE Bans  

Gasoline and Diesel Fuel Update (EIA)

Status and Impact of State MTBE Bans Status and Impact of State MTBE Bans Background As a result of the Clean Air Act Amendments of 1990 (CAAA90), the year-round use of reformulated gasoline (RFG) has been required in cities with the worst smog problems since 1995 (Figure 1). One of the requirements of RFG specified by CAAA90 is a 2- percent oxygen requirement, which is met by blending "oxygenates," 1 including methyl tertiary butyl ether (MTBE) and ethanol, into the gasoline. MTBE is the oxygenate used in almost all RFG outside of the Midwest. Ethanol is currently used in the Midwest as an oxygenate in RFG and as an octane booster and volume extender in conventional gasoline. Several years ago, MTBE was detected in water supplies scattered throughout the country, but predominantly in areas using RFG. MTBE from RFG was apparently

10

Motor Gasoline Outlook and State MTBE Bans  

Gasoline and Diesel Fuel Update (EIA)

Motor Gasoline Outlook Motor Gasoline Outlook and State MTBE Bans Tancred Lidderdale Contents 1. Summary 2. MTBE Supply and Demand 3. Ethanol Supply 4. Gasoline Supply 5. Gasoline Prices A. Long-Term Equilibrium Price Analysis B. Short-Term Price Volatility 6. Conclusion 7. Appendix A. Estimating MTBE Consumption by State 8. Appendix B. MTBE Imports and Exports 9. Appendix C. Glossary of Terms 10. End Notes 11. References 1. Summary The U.S. is beginning the summer 2003 driving season with lower gasoline inventories and higher prices than last year. Recovery from this tight gasoline market could be made more difficult by impending State bans on the blending of methyl tertiary butyl ether (MTBE) into gasoline that are scheduled to begin later this year. Three impending State bans on MTBE blending could significantly affect gasoline

11

Eliminating MTBE in Gasoline in 2006  

Gasoline and Diesel Fuel Update (EIA)

02/22/2006 02/22/2006 Eliminating MTBE in Gasoline in 2006 Summary In 2005, a number of petroleum companies announced their intent to remove methyl tertiary-butyl ether (MTBE) from their gasoline in 2006. Companies' decisions to eliminate MTBE have been driven by State bans due to water contamination concerns, continuing liability exposure from adding MTBE to gasoline, and perceived potential for increased liability exposure due to the elimination of the oxygen content requirement for reformulated gasoline (RFG) included in the Energy Policy Act of 2005. EIA's informal discussions with a number of suppliers indicate that most of the industry is trying to move away from MTBE before the 2006 summer driving season. Currently, the largest use of MTBE is in RFG consumed on the East Coast outside of

12

MTBE, Oxygenates, and Motor Gasoline (Released in the STEO October 1999)  

Reports and Publications (EIA)

The blending of methyl tertiary butyl ether (MTBE) into motor gasoline has increased dramatically since it was first produced 20 years ago. MTBE usage grew in the early 1980's in response to octane demand resulting initially from the phaseout of lead from gasoline and later from rising demand for premium gasoline. The oxygenated gasoline program stimulated an increase in MTBE production between 1990 and 1994. MTBE demand increased from 83,000 in 1990 to 161,000 barrels per day in 1994. The reformulated gasoline (RFG) program provided a further boost to oxygenate blending. The MTBE contained in motor gasoline increased to 269,000 barrels per day by 1997.

1999-01-01T23:59:59.000Z

13

Motor Gasoline Outlook and State MTBE Bans  

Reports and Publications (EIA)

The U.S. is beginning the summer 2003 driving season with lower gasoline inventories and higher prices than last year. Recovery from this tight gasoline market could be made more difficult by impending state bans on the blending of methyl tertiary butyl ether (MTBE) into gasoline that are scheduled to begin later this year.

2003-01-01T23:59:59.000Z

14

Water Research 37 (2003) 37563766 Seasonal and daily variations in concentrations of methyl-  

E-Print Network (OSTI)

by volume to gasoline from November to February, and blending 11% MTBE by volume during the rest of the year; accepted 24 March 2003 Abstract Methyl-tertiary-butyl ether (MTBE), an additive used to oxygenate gasoline of gasoline-powered watercraft. This paper documents and explains both seasonal and daily variations in MTBE

Toran, Laura

15

Environmental Microbiology (2001) 3(6), 407416 Methyl tert-butyl ether (MTBE) degradation by a  

E-Print Network (OSTI)

Tank (LUFT) remediation programme. A recent USGS study has estimated that as many as 9000 community, remediation actions are implemented at costs usually 10± 30% higher than those at sites without MTBE contamina- tion. The evaluation of innovative and cost-effective treatment such as bioremediation for MTBE spills

16

Methyl tert-butyl ether (MTBE) is a volatile organic com-pound (VOC) derived from natural gas that is added to gas-  

E-Print Network (OSTI)

Methyl tert-butyl ether (MTBE) is a volatile organic com- pound (VOC) derived from natural gas Water in Urban and Agricultural Areas made from methanol, which is derived primarily from natural gas that is added to gas- oline either seasonally or year round in many parts of the United States to increase

17

Role of Volatilization in Changing TBA and MTBE Concentrations at  

E-Print Network (OSTI)

a low affinity for gasoline (low Kfw, Table 1). Therefore, minute amounts of TBA in the MTBE blended tertiary butyl ether (MTBE) added to gasoline. Frequent observations of high TBA, and especially rising TBA/MTBE concentration ratios, in groundwater at gasoline spill sites are generally attributed to microbial conversion

18

Effects of Gasoline Formulation on Methyl tert-Butyl Ether (MTBE) Contamination in Private Wells near Gasoline Stations  

Science Journals Connector (OSTI)

New York State Department of Health, Bureau of Environmental Exposure Investigation, 547 River Street, Room 300, Troy, New York 12180, and New York State Department of Health, Wadsworth Center for Laboratories and Research, P.O. ... Wells with contamination of ?20 ?g/L were scheduled for periodic or follow-up sampling by local county health departments or scheduled for remedial action, as appropriate. ... (13)?Delzer, G. C.; Zogorski, J. S.; Lopes, T. J.; Bosshart, R. L. Occurrence of the gasoline Oxygenate MTBE and BTEX compounds in urban stormwater in the United States, 1991?1995; U.S. Geologic Survey Water-Resources Investigations Report, WRIR 96-4145, Rapid City, SD, 1996. ...

Daniel P. Lince; Lloyd R. Wilson; Gordon A. Carlson; Anthony Bucciferro

2001-02-10T23:59:59.000Z

19

Impacts of Ethanol on Anaerobic Production of Tert-Butyl Alcohol (TBA) from Methyl Tert-Butyl Ether (MTBE) in Groundwater  

E-Print Network (OSTI)

Project title: Impacts of Ethanol on Anaerobic Production oftert-butanol (TBA). As ethanol is being promoted as ainvestigate the effect of ethanol release on existing MTBE

Scow, K M; MacKay, Douglas

2008-01-01T23:59:59.000Z

20

Reaction of trans-dichloro-bis[N(1)-methyl-2-(arylazo)imidazole] ruthenium(II) with tertiary phosphines  

Science Journals Connector (OSTI)

Trans-dichloro-bis[N(1)-methyl-2-(arylazo)imidazol e] ruthenium(II) (tcc-Ru(MeL)2Cl2) reacts with tertiary phosphines giving rise to species of type [RuCl(P)-(MeL)2]+ and [Ru(P-P)(MeL)2]2+ in which Cl, P and P...

Tarun Kumar Misra; Chittaranjan Sinha

1999-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Microsoft Word - LBNL 53866_SPME-MTBE_Final_112103.doc  

Office of Scientific and Technical Information (OSTI)

There are numerous sources of MTBE contamination including leaking underground storage tanks, surface runoff, and precipitation (1-4). In California, MTBE contamination of...

22

energy savings by the use of mtbe to replace alkylate in automotive gasolines  

SciTech Connect

This paper presents data on the differences in energy consumption in the production of leaded and unleaded AI-93 gasolines with various blend components. The authors investigate as high-octane components certain products that are more effective in use and less energy-consuming in production in comparison with alkylate. In particular, methyl tert-butyl ether (MTBE) is discussed; it is not poisonous, it has a high heat of combustion, and it does not attack materials of construction. The addition of 11% MTBE to gasoline lowers the cold start temperature of engines by 10-12 degrees. Moreover, no adjustment of the carburetor is required for the changeover to gasoline with 11% MTBE.

Englin, B.A.; Emel'yanov, V.E.; Terent'ev, G.A.; Vinogradov, A.M.

1986-07-01T23:59:59.000Z

23

MTBE Prices Responded to Natural Gas Prices  

Gasoline and Diesel Fuel Update (EIA)

6 6 Notes: On top of the usual factors impacting gasoline prices, natural gas has had some influence recently. MTBE is an oxygenate used in most of the RFG consumed in the U.S. Generally, it follows gasoline prices and its own supply/demand balance factors. But this winter, we saw it respond strongly to natural gas prices. MTBE is made from methanol and isobutylene, which in turn come from methane and butane. Both methane and butane come from natural gas streams. Until this year, the price of natural gas has been so low that it had little effect. But the surge that occurred in December and January pulled MTBE up . Keep in mind that about 11% MTBE is used in a gallon of RFG, so a 30 cent increase in MTBE is only about a 3 cent increase in the price of RFG. While we look ahead at this summer, natural gas prices should be

24

Remedial Costs for MTBE in Soil and Ground Water  

Science Journals Connector (OSTI)

The contamination of MTBE in ground water has introduced concerns about the increased cost of remediating MTBE/BTEX releases compared to remediating sites with BTEX only contamination. In an attempt to evaluat...

Barbara H. Wilson; John T. Wilson Ph.D.

2003-01-01T23:59:59.000Z

25

Production of methyl tert-alkyl ethers  

SciTech Connect

The transition to the use of unleaded gasolines has required the replacement of tetraethyl lead by oxygen-containing compounds such as methanol, ethanol, and ethers, which are termed {open_quotes}oxygenates{close_quotes} in the technical literature. These may be used in commercial gasolines in amounts of 10-15% by volume, equivalent to 2% oxygen by weight. When methyl tert-butyl ether (MTBE) is used, the oxygen content may amount to 2.7% by weight. This oxygenate gives a significant improvement of knock resistance of naphtha fractions, the greatest effects being observed for straight-run naphthas and reformer naphthas produced under normal conditions; the MTBE also improves the engine power and economy characteristics and lowers the carbon monoxide content in the exhaust by 15-30% and the hydrocarbon content by 7-8%. This paper describes methods for the production of MTBE and also methyl tert-alkyl ethers.

Trofimov, V.A.

1995-01-01T23:59:59.000Z

26

E-Print Network 3.0 - aerobic mtbe biodegradation Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

27 ACCEPTED BY WATER ENVIRONMENT RESEARCH ODOR AND VOC REMOVAL FROM WASTEWATER TREATMENT PLANT Summary: capable of MTBE biodegradation. 12;Effective treatment of a mixture...

27

he increasing frequency of detection of the widely used gasoline additive methyl tert-  

E-Print Network (OSTI)

T he increasing frequency of detection of the widely used gasoline additive methyl tert- butyl, the September 15, 1999, Report of the Blue Ribbon Panel on Oxygenates in Gasoline (1) states that between 5 with large releases (e.g., LUFTs). Unprecedented growth in use Use of MTBE as a gasoline additive began

28

Spitsbergen Tertiary Coal Fossils  

Science Journals Connector (OSTI)

... grains and spores to be observed in coal deposits of Tertiary age in west Spitsbergen (Norsk Polarinstitutt, Med. 79, pp. 1-9; 1954; English summary).

1955-08-06T23:59:59.000Z

29

Remediation of Releases Containing MTBE at Gasoline Station Sites—ENSR International’s Experience  

Science Journals Connector (OSTI)

This chapter summarizes ENSR’s national and international experience remediating MTBE and other gasoline constituents in soil and ground water at retail gasoline station sites. ENSR has extensive experience in...

Robert M. Cataldo P.G.

2003-01-01T23:59:59.000Z

30

Preparations for Meeting New York and Connecticut MTBE Bans  

Gasoline and Diesel Fuel Update (EIA)

2 2 Preparations for Meeting New York and Connecticut MTBE Bans October 2003 Office of Oil and Gas Energy Information Administration U.S. Department of Energy Washington, DC 20585 This report was prepared by the Energy Information Administration, the independent statistical and analytical agency within the Department of Energy. The information contained herein should not be construed as advocating or reflecting any policy position of the Department of Energy or of any other organization. Contacts and Acknowledgments This report was prepared by the Office of Oil and Gas of the Energy Information Administration (EIA) under the direction of John Cook, Director, Petroleum Division. Questions concerning the report may be directed to Joanne Shore (202/586-4677),

31

Automobile proximity and indoor residential concentrations of BTEX and MTBE  

SciTech Connect

Attached garages have been identified as important sources of indoor residential air pollution. However, the literature lacks information on how the proximity of cars to the living area affects indoor concentrations of gasoline-related compounds, and the origin of these pollutants. We analyzed data from the Relationships of Indoor, Outdoor, and Personal Air (RIOPA) study and evaluated 114 residences with cars in an attached garage, detached garage or carport, or without cars. Results indicate that homes with cars in attached garages were affected the most. Concentrations in homes with cars in detached garages and residences without cars were similar. The contribution from gasoline-related sources to indoor benzene and MTBE concentrations appeared to be dominated by car exhaust, or a combination of tailpipe and gasoline vapor emissions. Residing in a home with an attached garage could lead to benzene exposures ten times higher than exposures from commuting in heavy traffic.

Corsi, Dr. Richard [University of Texas, Austin; Morandi, Dr. Maria [University of Texas Health Science Center, Houston; Siegel, Dr. Jeffrey [University of Texas, Austin; Hun, Diana E [ORNL

2011-01-01T23:59:59.000Z

32

APPENDXD.CHP:Corel VENTURA  

Gasoline and Diesel Fuel Update (EIA)

Report The Form EIA-819, "Monthly Oxygenate Report" provides production data for fuel ethanol and methyl tertiary butyl ether (MTBE). End-of-month stock data held at ethanol...

33

The feasibility of ethanol production in Texas  

E-Print Network (OSTI)

Agricultural interests across Texas are looking at the possibility of an ethanol industry in Texas. Continued conflict in the Middle East, the ban of methyl tertiary butyl ether (MTBE) in California, and low commodity prices have all lead...

Herbst, Brian Keith

2012-06-07T23:59:59.000Z

34

VOL. 32, No.4 UNL WATER CENTER AUGUST 2000 New Method For Detecting Trace Amounts of MTBE  

E-Print Network (OSTI)

water their use to help curb growing prob- at spill sites. lems with air pollution. MTBE is the most emis-by Steve Ress sions, are considered small. Gasoline additives that help keep our air clean can- "Most of the information available on oxygenates 10 mine the extent of their environmental impacts

Nebraska-Lincoln, University of

35

Use of superconductor type catalysts in the preparation of tertiary butyl alcohol from tertiary butyl hydroperoxide  

SciTech Connect

In a method wherein a solution of a tertiary butyl hydroperoxide charge stock in tertiary butyl alcohol is brought into contact with a catalytically effective amount of a hydroperoxide decomposition catalyst in a hydroperoxide decomposition reaction zone in liquid phase with agitation to convert said tertiary butyl hydroperoxide to decomposition products, principally tertiary butyl alcohol, the improvement is described which comprises: (a) using a superconductor as said hydroperoxide decomposition catalyst, and (b) recovering tertiary butyl alcohol from the products of said hydroperoxide decomposition reaction.

Sanderson, J.R.; Stockton, M.E.

1993-08-17T23:59:59.000Z

36

Concentrating aqueous acetate solutions with tertiary amines  

E-Print Network (OSTI)

Water may be extracted from aqueous calcium acetate or sodium acetate solutions using low miscibility, low molecular weight tertiary amines, e.g. triethylamine (TEA) and N,N- dietliylmethylaniine (DEMA). This novel extraction technology...

Lee, Champion

2012-06-07T23:59:59.000Z

37

Simultaneous Efficiency, NOx, and Smoke Improvements through Diesel/Gasoline Dual-Fuel Operation in a Diesel Engine  

E-Print Network (OSTI)

or liquefied petroleum gas, natural gas, biogas, hydrogen, and alcohols such as methanol, ethanol, iso-propanol, and n-butanol), and fuel additives (MTBE or methyl tertiary-butyl ether, H2O2 or hydrogen peroxide, 2-EHN or ethylhexyl nitrate and DTBP or di...

Sun, Jiafeng

2014-08-05T23:59:59.000Z

38

Quarterly Technical Progress Report - West Hackberry Tertiary Project  

SciTech Connect

The West Hackberry Tertiary Project is a field test of the concept that air injection can generate tertiary oil recovery through the Double Displacement Process is the gas displacement of a water invaded oil column for the purpose of recovering tertiary oil through gravity discharge. The novel aspect of this project is the use of air as the injection fluid.

Demetrois Yannimaras; Travis Gillham

1998-04-15T23:59:59.000Z

39

Quarterly Technical Progress Report - West Hackberry Tertiary Project  

SciTech Connect

The West Hackberry Tertiary Project is a field test of the concept that air injection can generate tertiary oil recovery through the Double Displacement Process is the gas displacement of a water invaded oil column for the purpose of recovering tertiary oil through gravity discharge. The novel aspect of this project is the use of air as the injection fluid.

Bruce Cerveny; Tor Kragas; Travis Gillham

1998-01-13T23:59:59.000Z

40

A SUMMARY OF COAL IN THE COALMONT FORMATION (TERTIARY),  

E-Print Network (OSTI)

Chapter SN A SUMMARY OF COAL IN THE COALMONT FORMATION (TERTIARY), NORTH PARK BASIN, COLORADO By S assessment of selected Tertiary coal beds and zones in the Northern RockyMountains and Great Plains region, U Resource assessment of selected Tertiary coal beds and zones in the Northern Rocky Mountains and Great

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Catalytic distillation for the synthesis of tertiary butyl alcohol.  

E-Print Network (OSTI)

??Catalytic Distillation for the synthesis of tertiary butyl alcohol (TBA) is investigated in this thesis. The solvent, ethylene glycol, is proposed as a means of… (more)

Safinski, Tomasz

2005-01-01T23:59:59.000Z

42

RELATIONS BETWEEN THE DETECTION OF METHYL TERT-BUTYL ETHER (MTBE) IN SURFACE AND GROUND WATER AND ITS CONTENT IN GASOLINE  

E-Print Network (OSTI)

AND ITS CONTENT IN GASOLINE By Michael J. Moran, Mike J. Halde, Rick M. Clawges and John S. Zogorski U in the United States as an octane enhancer and oxygenate in gasoline. Octane enhancement began in the late 1970's with the phase-out of tetraethyl lead from gasoline. The use of oxygenates was expanded

43

Compound “J” in Late Cretaceous/Tertiary terrigenous oils revisited: Structure elucidation of a rearranged oleanane coeluting on GC with 18?(H)-oleanane  

Science Journals Connector (OSTI)

Abstract A C30 pentacyclic triterpane eluting slightly after 18?(H)-oleanane in the m/z 191 mass chromatograms of Late Cretaceous/Tertiary terrigenous oils (peak “J” in the early literature) has been isolated from a Niger Delta oil and identified using NMR spectroscopy as 3?-methyl-24-nor-18?(H)-oleanane. The previous assignment as 18?(H)-oleanane is therefore partly erroneous. 3?-Methyl-24-nor-18?(H)-oleanane affords a larger m/z 412 ? 356 response than the oleananes and the relative contribution of 3?-methyl-24-nor-18?(H)-oleanane to the 412 ? 191 “oleanane peak” can be roughly estimated from comparison of the 412 ? 356/412 ? 191 ratio from the oleanane peak with that of the pure compounds. 3?-Methyl-24-nor-18?(H)-oleanane can be as abundant as 18?(H)-oleanane in oils having a high concentration of early eluting rearranged oleananes. 3?-Methyl-24-nor-19?(H)-taraxastane was also tentatively assigned in the oils on the basis of its mass spectrum as well as its gas chromatography and high performance liquid chromatography retention times. 3?-Methyl-24-nor-gammacerane was tentatively assigned in a similar way in an oil containing gammacerane. All 3?-methyl-24-nor-triterpanes could be formed via dehydration, rearrangement and hydrogenation of triterpenoids having an OH group at C-3.

Hans Peter Nytoft; Geir Kildahl-Andersen; Tatjana Šolevi? Knudsen; Ksenija Stojanovi?; Frode Rise

2014-01-01T23:59:59.000Z

44

Aqueous flooding methods for tertiary oil recovery  

DOE Patents (OSTI)

A method of aqueous flooding of subterranean oil bearing formation for tertiary oil recovery involves injecting through a well into the formation a low alkaline pH aqueous sodium bicarbonate flooding solution. The flooding solution's pH ranges from about 8.25 to 9.25 and comprises from 0.25 to 5 weight percent and preferably about 0.75 to 3.0 weight percent of sodium bicarbonate and includes a petroleum recovery surfactant of 0.05 to 1.0 weight percent and between 1 and 20 weight percent of sodium chloride. After flooding, an oil and water mixture is withdrawn from the well and the oil is separated from the oil and water mixture.

Peru, Deborah A. (Bartlesville, OK)

1989-01-01T23:59:59.000Z

45

Oxygenate Supply/Demand Balances in the Short-Term Integrated Forecasting Model (Released in the STEO March 1998)  

Reports and Publications (EIA)

The blending of oxygenates, such as fuel ethanol and methyl tertiary butyl ether (MTBE), into motor gasoline has increased dramatically in the last few years because of the oxygenated and reformulated gasoline programs. Because of the significant role oxygenates now have in petroleum product markets, the Short-Term Integrated Forecasting System (STIFS) was revised to include supply and demand balances for fuel ethanol and MTBE. The STIFS model is used for producing forecasts in the Short-Term Energy Outlook. A review of the historical data sources and forecasting methodology for oxygenate production, imports, inventories, and demand is presented in this report.

1998-01-01T23:59:59.000Z

46

Blended language learning in tertiary education  

Science Journals Connector (OSTI)

This paper examines the supporting and enhancing role of technology in language learning and teaching in a higher education institution in Slovenia. Despite the fact that the vast majority of foreign language teaching is still carried out in face-to-face environments, a growing extent of foreign language teaching in a number of tertiary education institutions has moved, at least partly, online. In this paper, the development of e-learning practices in Slovenia is described first, together with the evolution of computer technologies – from multimedia to the internet – and their potential for language learning and teaching purposes. Against this background, the practical application of the Blended Language Learning (BLL) experience at the Faculty of Management Koper is discussed. The paper also addresses the changing role of teachers in blended language teaching/learning environments and analyses the opinions of students who participated in a combination of Face-to-Face (F2F) and Computer-Assisted Language Learning (CALL) courses and expressed their opinions on the BLL experience in a questionnaire.

Igor Riznar

2009-01-01T23:59:59.000Z

47

A SUMMARY OF COAL IN THE FORT UNION FORMATION (TERTIARY), BIGHORN BASIN,  

E-Print Network (OSTI)

Chapter SB A SUMMARY OF COAL IN THE FORT UNION FORMATION (TERTIARY), BIGHORN BASIN, WYOMING assessment of selected Tertiary coal beds and zones in the Northern RockyMountains and Great Plains region, U...........................................................................................................................SB-1 Coal Production History

48

E-Print Network 3.0 - australian tertiary referral Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Darwin Institution Programme Summary: ANUTECH (Australian National University) Foundation Studies Program Australian National University... for Tertiary Studies) Batchelor...

49

EXECUTIVE SUMMARY TERTIARY COAL RESOURCES IN THE NORTHERN  

E-Print Network (OSTI)

EXECUTIVE SUMMARY TERTIARY COAL RESOURCES IN THE NORTHERN ROCKY MOUNTAINS AND GREAT PLAINS REGION RockyMountains and Great Plains region, U.S. Geological Survey Professional Paper 1625-A Click here in the Northern Rocky Mountains and Great Plains region, U.S. Geological Survey Professional Paper 1625-A #12;ES

50

Controlling DNA Methylation  

NLE Websites -- All DOE Office Websites (Extended Search)

Controlling DNA Methylation Though life on earth is composed of a diverse range of organisms, some with many different types of tissues and cells, all these are encoded by a molecule we call DNA. The information required to build a protein is stored in DNA within the cells. Not all the message in the DNA is used in each cell and not all the message is used all the time. During cell differentiation, the cells become dedicated for their specific function which involves selectively activating some genes and repressing others. Gene regulation is an important event in the developmental biology and the biology of various diseases, but a more complex process. Controlling DNA Methylation Though life on earth is composed of a diverse range of organisms, some with many different types of tissues and cells, all these are encoded by a molecule we call DNA. The information required to build a protein is stored in DNA within the cells. Not all the message in the DNA is used in each cell and not all the message is used all the time. During cell differentiation, the cells become dedicated for their specific function which involves selectively activating some genes and repressing others. Gene regulation is an important event in the developmental biology and the biology of various diseases, but a more complex process. In the bacteria there are distinct enzymes while one is capable of cleaving DNA, the other protects DNA by modification. The complementary function provided by the set of enzymes offers a defense mechanism against the phage infection and DNA invasion. The incoming DNA is cleaved sequence specifically by the class of enzymes called restriction endonuclease (REase). The host DNA is protected by the sequence specific action of matching set of enzymes called the DNA methyltransferase (MTase). The control of the relative activities of the REase and MTase is critical because a reduced ratio of MTase/REase activity would lead to cell death via autorestriction. However too high a ratio would fail to provide protection against invading viral DNA. In addition a separate group of proteins capable of controlling R-M proteins have been identified in various restriction-modification (R-M) systems which are called C proteins (Roberts et al., 2003).

51

E-Print Network 3.0 - academic tertiary care Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

of Rochester, Rochester, New York 14627 (Received 1 April 1996) Tertiary protons with birth... targets, such as those planned for the National Ignition Facility. Measurement of...

52

An investigation into diglossia, literacy, and tertiary-level EFL classes in the Arabian Gulf States.  

E-Print Network (OSTI)

??This study investigates whether the remedial tertiary-level EFL classes in the Arabian Gulf States optimize the process of acquiring English for the majority of the… (more)

Rivard, Jane Nathalie.

2006-01-01T23:59:59.000Z

53

E-Print Network 3.0 - alcohols aromatic tertiary Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: in their synthesis include the use of a nucleophilic aromatic substitution reaction to construct the chiral tertiary... of 13-membered macrolactams that possess a...

54

E-Print Network 3.0 - aromatic tertiary alcohols Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: in their synthesis include the use of a nucleophilic aromatic substitution reaction to construct the chiral tertiary... of 13-membered macrolactams that possess a...

55

Measurement of Trihalomethanes and Methyl Tertiary-Butyl Ether in Tap Water Using Solid-Phase Microextraction GC-MS  

Science Journals Connector (OSTI)

......ductive age living in Corpus Christi, Texas and Cobb...micro extraction with gas chromatography-mass...determinations using gas chromatog- raphy...of fulvic acids in natural waters. Env. Sci...trihalomethane by headspace-gas chromatog- raphy......

Frederick L. Cardinali; David L. Ashley; John C. Morrow; Deborah M. Moll; Benjamin C. Blount

2004-04-01T23:59:59.000Z

56

Pool octanes via oxygenates  

SciTech Connect

Increasingly stringent antipollution regulations placed on automobile exhaust gases with consequent reduction or complete lead ban from motor gasoline result in octane shortage at many manufacturing sites. Attractive solutions to this problem, especially in conjunction with abundant methanol supplies, are the hydration and etherification of olefins contained in light product streams from cracking unit or produced by field gas dehydrogenation. A comparison is made between oxygenates octane-volume pool contributions and established refinery technologies. Process reviews for bulk manufacture of fuel-grade isopropanol (IPA), secondary butanol (SBA), tertiary butanol (TBA), methyl tertiary butyl ether (MTBE) and tertiary amyl methyl ether (TAME) are presented together with the characteristic investment and operating data. The implantation of these processes into a typical FCCU refinery complex with the resulting octane-pool improvement possibilities is descried.

Prezelj, M.

1987-09-01T23:59:59.000Z

57

The identification of recurrent tertiary motifs by interactions of protein secondary structure units  

E-Print Network (OSTI)

. Through an informatics analysis of recurrent tertiary contacts, we have derived a database of recurrent tertiary motifs. A group of 691 high-resolution, non-redundant protein structures was obtained. For each protein in this source data, we found all...

Hodges, Hamilton Courtney

2013-02-22T23:59:59.000Z

58

1,4,7-Trimethyloxatriquinane: SN2 Reaction at Tertiary Carbon Mark Mascal,* Nema Hafezi, and Michael D. Toney  

E-Print Network (OSTI)

1,4,7-Trimethyloxatriquinane: SN2 Reaction at Tertiary Carbon Mark Mascal,* Nema Hafezi for the reaction between 1 and N3 - is SN2, despite the fact that substitution is occurring at a tertiary carbon chemistry textbooks, is that bimolecular nucleophilic substitution (SN2) reactions do not occur at tertiary

Toney, Michael

59

Detailed Chemical Kinetic Reaction Mechanism for Biodiesel Components Methyl Stearate and Methyl Oleate  

SciTech Connect

New chemical kinetic reaction mechanisms are developed for two of the five major components of biodiesel fuel, methyl stearate and methyl oleate. The mechanisms are produced using existing reaction classes and rules for reaction rates, with additional reaction classes to describe other reactions unique to methyl ester species. Mechanism capabilities were examined by computing fuel/air autoignition delay times and comparing the results with more conventional hydrocarbon fuels for which experimental results are available. Additional comparisons were carried out with measured results taken from jet-stirred reactor experiments for rapeseed methyl ester fuels. In both sets of computational tests, methyl oleate was found to be slightly less reactive than methyl stearate, and an explanation of this observation is made showing that the double bond in methyl oleate inhibits certain low temperature chain branching reaction pathways important in methyl stearate. The resulting detailed chemical kinetic reaction mechanism includes more approximately 3500 chemical species and more than 17,000 chemical reactions.

Naik, C; Westbrook, C K; Herbinet, O; Pitz, W J; Mehl, M

2010-01-22T23:59:59.000Z

60

Origin of gaseous hydrocarbons from Upper Cretaceous and Tertiary strata in the Piceance basin, western Colorado  

E-Print Network (OSTI)

Natural gas samples were collected for geochemical analyses from Upper Cretaceous and Tertiary strata of the Piceance basin in western Colorado to: 1) determine the origin of gases (i.e., microbial versus thermogenic), 2) determine the thermogenic...

Katz, David Jonathan

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Petrogenesis of voluminous mid-Tertiary ignimbrites of the Sierra Madre Occidental, Chihuahua, Mexico  

Science Journals Connector (OSTI)

The mid-Tertiary ignimbrites of the Sierra Madre Occidental of western Mexico constitute the largest continuous rhyolitic province in the world. The rhyolites appear to represent part of a continental magmatic...

Maryellen Cameron; William C. Bagby…

1980-10-01T23:59:59.000Z

62

Radiation dose levels during interventional cardiology procedures in a tertiary care hospital  

Science Journals Connector (OSTI)

......cardiology procedures in a tertiary care hospital O. Dragusin 1 W. Desmet 2 H. Heidbuchel...Department of Radiology, University Hospital Gasthuisberg, Herestraat 49, B-3000...Department of Cardiology, University Hospital Gasthuisberg, Herestraat 49, B-3000......

O. Dragusin; W. Desmet; H. Heidbuchel; R. Padovani; H. Bosmans

2005-12-01T23:59:59.000Z

63

A SUMMARY OF TERTIARY COAL RESOURCES OF THE RATON BASIN, COLORADO AND NEW MEXICO  

E-Print Network (OSTI)

............................................................................................................SR-13 Coal-bed Methane and potential coal-bed methane production in Raton Basin. Adapted from Hemborg (1996). 1999 RChapter SR A SUMMARY OF TERTIARY COAL RESOURCES OF THE RATON BASIN, COLORADO AND NEW MEXICO By R

64

Stochastic Programming Approach to Hydraulic Fracture Design for the Lower Tertiary Gulf of Mexico  

E-Print Network (OSTI)

In this work, we present methodologies for optimization of hydraulic fracturing design under uncertainty specifically with reference to the thick and anisotropic reservoirs in the Lower Tertiary Gulf of Mexico. In this analysis we apply a stochastic...

Podhoretz, Seth

2013-07-27T23:59:59.000Z

65

Assessment of Summer RBOB Supply for NY & CT  

Gasoline and Diesel Fuel Update (EIA)

Update of Summer Reformulated Gasoline Supply Update of Summer Reformulated Gasoline Supply Assessment for New York and Connecticut May 5, 2004 In October 2003, EIA published a review of the status of the methyl tertiary butyl ether (MTBE) ban transition in New York (NY) and Connecticut (CT) 1 that noted significant uncertainties in gasoline supply for those States for the summer of 2004. To obtain updated information, EIA spoke to major suppliers to the two States over the past several months as the petroleum industry began the switch from winter- to summer-grade gasoline. As discussed on our earlier report, the NY and CT bans on MTBE mainly affect reformulated gasoline (RFG), which in recent years has been provided by domestic refineries on the East Coast (PADD 1) and imports. Our recent findings indicate that

66

Ultrasonic absorption associated with tertiary butanol complex formation in normal-hexane solutions  

E-Print Network (OSTI)

ULTRASONIC ABSORPTION ASSOCIATED WITH TERTIARY BUTANOL COMPLEX FORMATION IN NORMAL-HEXANE SOLUTIONS A Thesis by SALIM MICHEL BUCARAM Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 196l Major Subject; Physics ULTRASONIC ABSORPTION ASSOCIATED WITH TERTIARY BUTANOL COMPLEX FORMATION IN NORMAL-HEXANE SOLUTIONS A Thesis by SALIM MICHEL BUCARAM Approved as to style and content by...

Bucaram, Salim Michel

2012-06-07T23:59:59.000Z

67

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

Ethanol Plant Production Ethanol Plant Production Definitions Key Terms Definition Barrel A unit of volume equal to 42 U.S. gallons. Fuel Ethanol An anhydrous alcohol (ethanol with less than 1% water) intended for gasoline blending as described in the Oxygenates definition. Oxygenates Substances which, when added to gasoline, increase the amount of oxygen in that gasoline blend. Ethanol, Methyl Tertiary Butyl Ether (MTBE), Ethyl Tertiary Butyl Ether (ETBE), and methanol are common oxygenates. Fuel Ethanol: Blends of up to 10 percent by volume anhydrous ethanol (200 proof) (commonly referred to as the "gasohol waiver"). Methanol: Blends of methanol and gasoline-grade tertiary butyl alcohol (GTBA) such that the total oxygen content does not exceed 3.5 percent by weight and the ratio of methanol to GTBA is less than or equal to 1. It is also specified that this blended fuel must meet ASTM volatility specifications (commonly referred to as the "ARCO" waiver).

68

A review of Tertiary climate changes in southern South America and the Antarctic Peninsula. Part 1: Oceanic conditions .  

E-Print Network (OSTI)

??Oceanic conditions around southern South America and the Antarctic Peninsula have a major influence on climate patterns in these subcontinents. During the Tertiary, changes in… (more)

Le Roux, J. P.

2012-01-01T23:59:59.000Z

69

Treatment of Methyl tert-Butyl Ether Vapors in Biotrickling Filters. 1.  

E-Print Network (OSTI)

because of its low cost and blending characteristics. Depending on the season, reformulated gasoline of reactor per hour, a value comparable to other gasoline constituents. Such high performance could enhancer in gasoline. The use of MTBE increased rapidly after the 1990 Clean Air Act Amendments required

70

Methylal and Methylal-Diesel Blended Fuels from Use In Compression-Ignition Engines  

SciTech Connect

Gas-to-liquids catalytic conversion technologies show promise for liberating stranded natural gas reserves and for achieving energy diversity worldwide. Some gas-to-liquids products are used as transportation fuels and as blendstocks for upgrading crude derived fuels. Methylal (CH{sub 3}-O-CH{sub 2}-O-CH{sub 3}) also known as dimethoxymethane or DMM, is a gas-to-liquid chemical that has been evaluated for use as a diesel fuel component. Methylal contains 42% oxygen by weight and is soluble in diesel fuel. The physical and chemical properties of neat methylal and for blends of methylal in conventional diesel fuel are presented. Methylal was found to be more volatile than diesel fuel, and special precautions for distribution and fuel tank storage are discussed. Steady state engine tests were also performed using an unmodified Cummins 85.9 turbocharged diesel engine to examine the effect of methylal blend concentration on performance and emissions. Substantial reductions of particulate matter emissions h ave been demonstrated 3r IO to 30% blends of methylal in diesel fuel. This research indicates that methylal may be an effective blendstock for diesel fuel provided design changes are made to vehicle fuel handling systems.

Keith D. Vertin; James M. Ohi; David W. Naegeli; Kenneth H. Childress; Gary P. Hagen; Chris I. McCarthy; Adelbert S. Cheng; Robert W. Dibble

1999-05-05T23:59:59.000Z

71

Effect of salinity on methylation of mercury  

SciTech Connect

Monomethyl and dimethylmercury are potent neurotoxins subject to biomagnification in food webs. This fact was tragically demonstrated by the Minamata and Niigata poisoning incidents in Japan in which 168 persons who ate seafood from mercury polluted waters were poisoned, 52 fatally. Shortly after these two incidents, work conducted in freshwater environments demonstrated the microbial conversion of inorganic and phenylmercury compounds to mono- and di-methylmercury. Consideration of some fragmentary evidence from the literature, however, indicates that the rate and the significance of microbial methylation of mercury in freshwater and saltwater environments may not be the same. A demonstrated relationship between mercury methylation rates and water salinity would greatly influence our thinking about mercury pollution effects in marine versus freshwater environments. Since we were unable to locate published reports on this subject, we are investigating the influence of salinity on the rate of mercury methylation in an estuarine sediment.

Blum, J.E.; Bartha, R.

1980-09-01T23:59:59.000Z

72

Short report Doctors leaving 12 tertiary hospitals in Iraq, 20042007q  

E-Print Network (OSTI)

Short report Doctors leaving 12 tertiary hospitals in Iraq, 2004­2007q Gilbert M. Burnham a 21205, USA b Al Mustansiriya, Baghdad, Iraq a r t i c l e i n f o Article history: Available online 6 June 2009 Keywords: Iraq Doctors Violence Doctor migration Hospitals Medical workforce a b s t r a c

Scharfstein, Daniel

73

New surfactant classes for enhanced oil recovery and their tertiary oil recovery potential  

E-Print Network (OSTI)

commercial scale projects were also executed. Nowadays, because of the high oil price, this technology hasNew surfactant classes for enhanced oil recovery and their tertiary oil recovery potential Stefan States a b s t r a c ta r t i c l e i n f o Article history: Received 23 February 2009 Accepted 14

Goddard III, William A.

74

Interplay between Secondary and Tertiary Structure Formation in Protein Folding Cooperativity  

E-Print Network (OSTI)

Interplay between Secondary and Tertiary Structure Formation in Protein Folding Cooperativity¨lich, 52425 Ju¨lich, Germany Received June 14, 2010; E-mail: deserno@andrew.cmu.edu Abstract: Protein folding be difficult to measure. Therefore, protein folding cooperativity is often probed using the calorimetric

Bachmann, Michael

75

Occurrence and Implication of dissolved organic phosphorus (DOP) in tertiary wastewater Effluents Page 1 of 6  

E-Print Network (OSTI)

GU, APRIL Occurrence and Implication of dissolved organic phosphorus (DOP) in tertiary wastewater wastewater effluents L. Liu1 , D. S. Smith2 , M. Bracken3 , J.B. Neethling4 , H.D. Stensel5 and S. Murthy6 levels (e.g. TPwastewater treatment plants. A few previous studies (Benisch et al., 2007

Brody, James P.

76

An Efficient Genetic Algorithm for Predicting Protein Tertiary Structures in the 2D HP Model  

E-Print Network (OSTI)

, predicting its tertiary structure is known as the protein folding problem. This problem has been widely genetic algo- rithm for the protein folding problem under the HP model in the two-dimensional square Genetic Algorithm, Protein Folding Problem, 2D HP Model 1. INTRODUCTION Amino acids are the building

Istrail, Sorin

77

Accelerated Degradation of Methyl Iodide by Agrochemicals  

Science Journals Connector (OSTI)

Accelerated Degradation of Methyl Iodide by Agrochemicals ... Integrating the application of certain agrochemicals with soil fumigation provides a novel approach to reduce excessive fumigant emissions. ... This study investigated the potential for several agrochemicals that are commonly used in farming operations, including fertilizers and nitrification inhibitors, to transform MeI in aqueous solution. ...

Wei Zheng; Sharon K. Papiernik; Mingxin Guo; Scott R. Yates

2003-01-01T23:59:59.000Z

78

Low temperature synthesis of methyl formate  

DOE Patents (OSTI)

A gas reaction process for the preferential production of methyl formate over the co-production of methanol wherein the reactant ratio of CO/H.sub.2 is upgraded and this reaction takes place at low temperatures of 50.degree.-150.degree. C. and moderate pressures of .gtoreq.100 psi.

Mahajan, Devinder (Selden, NY); Slegeir, William A. (Hampton Bays, NY); Sapienza, Richard S. (Shoreham, NY); O'Hare, Thomas E. (Huntington Station, NY)

1986-01-01T23:59:59.000Z

79

E-Print Network 3.0 - amplified methylation polymorphism Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

Environmental Sciences and Ecology 2 Infraspecific DNA Methylation Polymorphism in Cotton (Gossypium Summary: Infraspecific DNA Methylation Polymorphism in Cotton (Gossypium...

80

Play analysis and stratigraphic position of Uinta Basin tertiary - age oil and gas fields  

SciTech Connect

Tertiary-age sediments in the Uinta basin produce hydrocarbons from five types of plays. These play types were determined by hydrocarbon type, formation, depositional environment, rock type, porosity, permeability, source, and per-well recovery. Each well was reviewed to determine the stratigraphic position and producing characteristics of each producing interval. The five types of plays are as follows: (1) naturally fractured oil reservoirs, (2) low-permeability oil reservoirs, (3) high-permeability of oil reservoirs, (4) low-permeability gas reservoirs, and (5) tight gas sands. Several fields produce from multiple plays, which made it necessary to segregate the hydrocarbon production into several plays. The stratigraphic position of the main producing intervals is shown on a basin-wide cross section, which is color-coded by play type. This 61-well cross section has several wells from each significant Tertiary oil and gas field in the Uinta basin.

Williams, R.A. (Pennzoil Exploration and Production Co., Houston, TX (United States))

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Concentrating aqueous volatile fatty acid salt solutions using a tertiary amine mixture  

E-Print Network (OSTI)

, and that reaction is difficult to reverse (Streitwieser and Heathcock, 1976; King and Poole, 1994). Tertiary amines (R, N) do not form amides but generally give lower K, values than secondary amines. For the extraction of undissociated carboxylic acids, aliphatic... by acidifying with carbon dioxide under pressure in the presence of a suitable solvent (Busche, 1988). Gregor has used electrodialysis to recover acetic acid from dilute (1-5 wt%) acetate solutions. With newer membranes, acid concentrations up to 30% were...

Gaskin, David J

1997-01-01T23:59:59.000Z

82

High octane ethers from synthesis gas-derived alcohols. Final technical report, September 25, 1990--December 24, 1993  

SciTech Connect

The objective of the research was to develop the methodology for the catalytic synthesis of ethers, primarily methyl isobutyl ether (MIBE) and methyl tertiary butyl ether (MTBE), directly from alcohol mixtures that are rich in methanol and 2-methyl-1-propanol (isobutanol). The overall scheme involves gasification of coal, purification and shifting of the synthesis gas, higher alcohol synthesis, and direct synthesis of ethers. The last stage of the synthesis involves direct coupling of synthesis gas-derived methanol and isobutanol that has been previously demonstrated by us to occur over superacid catalysts to yield MIBE and smaller amounts of MTBE at moderate pressures and a mixture of methanol and isobutene at low pressures. A wide range of organic resin catalysts and inorganic oxide and zeolite catalysts have been investigated for activity and selectivity in directly coupling alcohols, principally methanol and isobutanol, to form ethers and in the dehydration of isobutanol to isobutene in the presence of methanol. All of these catalysts are strong acids, and it was found that the organic and inorganic catalysts operate in different, but overlapping, temperature ranges, i.e. mainly 60--120{degrees}C for the organic resins and 90--175{degrees}C for the inorganic catalysts. For both types of catalysts, the presence of strong acid centers is required for catalytic activity, as was demonstrated by lack of activity of fully K{sup +} ion exchanged Nafion resin and zirconia prior to being sulfated by treatment with sulfuric acid.

Klier, K.; Herman, R.G.

1994-05-01T23:59:59.000Z

83

Mercury methylation in periphyton of the Florida Everglades  

Science Journals Connector (OSTI)

... aquatic ecosystems is of global concern due to health effects associated with eating fish with ... This new methylation site has implications for trophic transfer of

84

A review on environmental factors regulating arsenic methylation in humans  

SciTech Connect

Subjects exposed to arsenic show significant inter-individual variation in urinary patterns of arsenic metabolites but insignificant day-to-day intra-individual variation. The inter-individual variation in arsenic methylation can be partly responsible for the variation in susceptibility to arsenic toxicity. Wide inter-ethnic variation and family correlation in urinary arsenic profile suggest a genetic effect on arsenic metabolism. In this paper the environmental factors affecting arsenic metabolism are reviewed. Methylation capacity might reduce with increasing dosage of arsenic exposure. Furthermore, women, especially at pregnancy, have better methylation capacity than their men counterparts, probably due to the effect of estrogen. Children might have better methylation capacity than adults and age shows inconsistent relevance in adults. Smoking and alcohol consumption might be associated with a poorer methylation capacity. Nutritional status is important in the methylation capacity and folate may facilitate the methylation and excretion of arsenic. Besides, general health conditions and medications might influence the arsenic methylation capacity; and technical problems can cause biased estimates. The consumption of seafood, seaweed, rice and other food with high arsenic contents and the extent of cooking and arsenic-containing water used in food preparation may also interfere with the presentation of the urinary arsenic profile. Future studies are necessary to clarify the effects of the various arsenic metabolites including the trivalent methylated forms on the development of arsenic-induced human diseases with the consideration of the effects of confounding factors and the interactions with other effect modifiers.

Tseng, C.-H. [National Taiwan University College of Medicine, Taipei, Taiwan (China); Division of Endocrinology and Metabolism, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan (China); Department of Medical Research and Development, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin, Taiwan (China); School of Public Health, Taipei Medical University, Taipei, Taiwan (China); Division of Environmental Health and Occupational Medicine of the National Health Research Institutes, Taipei, Taiwan (China)], E-mail: ccktsh@ms6.hinet.net

2009-03-15T23:59:59.000Z

85

Has the National Health Insurance improved the inequality in the use of tertiary-care hospitals in Korea?  

Science Journals Connector (OSTI)

AbstractBackground To improve financial protection against catastrophic illness, the Korean government expanded the benefit coverage of the National Health Insurance (NHI) for cancer patients in 2005. This paper examined whether the policy has reduced income-inequality in the use of tertiary care hospitals. Methods We evaluated the effect of the policy on income-inequalities in outpatient visits and inpatient admissions to tertiary care hospitals, based on triple difference estimators. Using nationwide claims data of the NHI from 2002 to 2010, we compared cancer patients as a treatment group with liver disease and cardio-cerebrovascular disease as control groups and the lower-income with the highest-income group. Results Before the introduction of the policy, lower-income cancer patients utilized less inpatient and outpatient services in tertiary care hospitals than high-income patients did. After the benefit coverage was expanded, while the incidence and total number of inpatient admissions to tertiary care hospitals increased among cancer patients compared with liver diseases, lower-income cancer patients experienced a greater increase than those of higher-income did compared with both diseases. The use of outpatient services increased more in cancer patients than those of both diseases; however, the gap between the highest- and the lowest-income rarely decreased, except the incidence of visits when compared to liver disease. Conclusion Our findings indicated that the expanded NHI benefits coverage partially improved income-related inequalities in inpatient admissions to tertiary-care hospital, but not in outpatient visits.

Sujin Kim; Soonman Kwon

2014-01-01T23:59:59.000Z

86

EA-1157: Methyl Chloride via Oxyhydrochlorination of Methane: A Building  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

57: Methyl Chloride via Oxyhydrochlorination of Methane: A 57: Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas, Carrollton, Kentucky EA-1157: Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas, Carrollton, Kentucky SUMMARY This EA evaluates the environmental impacts for the proposal to advance Oxyhydrochlorination technology to an integrated engineering-scale process. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD September 27, 1996 EA-1157: Finding of No Significant Impact Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas September 27, 1996 EA-1157: Final Environmental Assessment Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for

87

Host cells and methods for producing 3-methyl-2-buten-1-ol, 3-methyl-3-buten-1-ol, and 3-methyl-butan-1-ol  

DOE Patents (OSTI)

The invention provides for a method for producing a 5-carbon alcohol in a genetically modified host cell. In one embodiment, the method comprises culturing a genetically modified host cell which expresses a first enzyme capable of catalyzing the dephosphorylation of an isopentenyl pyrophosphate (IPP) or dimethylallyl diphosphate (DMAPP), such as a Bacillus subtilis phosphatase (YhfR), under a suitable condition so that 5-carbon alcohol is 3-methyl-2-buten-1-ol and/or 3-methyl-3-buten-1-ol is produced. Optionally, the host cell may further comprise a second enzyme capable of reducing a 3-methyl-2-buten-1-ol to 3-methyl-butan-1-ol, such as a reductase.

Chou, Howard H. (Berkeley, CA); Keasling, Jay D. (Berkeley, CA)

2011-07-26T23:59:59.000Z

88

Plant observation report and evaluation, Pennwalt Corporation, secondary and tertiary aliphatic monoamines  

SciTech Connect

A site visit was made to the amine manufacturing facility of the Pennwalt Corporation, Wyandotte, Michigan, to evaluate the facility in regard to the Secondary and Tertiary Aliphatic Monoamines Criteria Document. A total of 21 people were directly in contact with the amine production process. Two to four of the maintenance personnel may also come in contact with the process. Maintenance workers ran the risk of exposure not only to primary, secondary and tertiary amine compounds, but also to several other chemicals being used in the process. The processes used to unload raw materials are described, along with reactor operations, decanter and recycling operations, distillation operations, product storage and shipping. Medical monitoring at the facility included chest x-ray, respiratory function tests, sight screening, urinalysis, and back x-rays. Restricted and potentially hazardous area signs were clearly posted. Employees wore hard hats and safety glasses on the job as well as gloves, rubber boots, face shields, goggles, and respirators as necessary. Emergency procedures are described, including fire protection. Sanitation and personal hygiene are discussed, along with monitoring of the workplace conditions.

Not Available

1980-08-27T23:59:59.000Z

89

E-Print Network 3.0 - arsenic methylation profiles Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: , urinary arsenic methylation profiles, and urothelial carcinoma susceptibility. Food Chem. Toxicol. 46, 929... and in vitro studies suggest that methylated arsenic...

90

Isotopic Data Bearing on the Origin of Mesozoic and Tertiary Granitic Rocks in the Western United States  

Science Journals Connector (OSTI)

...Granitic Rocks in the Western United States D. J...Utah, Arizona, and Colorado. The plutons, which...Utah, Arizona and Colorado. The plutons, which...California Cenozoic Colorado crust differentiation...Tertiary United States Utah Western U.S. 1983 03 23 The...

1984-01-01T23:59:59.000Z

91

Magnetostratigraphy of Tertiary sediments from the Hoh Xil Basin: implications for the Cenozoic tectonic history of the Tibetan Plateau  

Science Journals Connector (OSTI)

......consists mainly of the lake carbonate with some black oil shale (Liu Wang 1999). It disconformably overlies the Fenghuoshan...A, 326, 177-188. Liu Z. , Wang C., 1999. Oil shale in the Tertiary Hoh Xil basin, northern Qinghai-Tibet......

Zhifei Liu; Xixi Zhao; Chengshan Wang; Shun Liu; Haisheng Yi

2003-08-01T23:59:59.000Z

92

Alteration of the tertiary structure of the major bee venom allergen Api m 1 by multiple mutations is  

E-Print Network (OSTI)

Alteration of the tertiary structure of the major bee venom allergen Api m 1 by multiple mutations a recombinant form of the major bee venom allergen (Api m 1) with the final goal of reducing its IgE reactivity. This molecule (Api mut) contains 24 mutations and one deletion of 10 amino acids. The successive introduction

Gelb, Michael

93

Eliminating MTBE in Gasoline in 2006  

Annual Energy Outlook 2012 (EIA)

for and moving more ethanol to the East Coast and Texas, converting terminal tanks from petroleum to ethanol, adding blending equipment at many terminals, and finding...

94

Tectonostratigraphic reconstruction and lithofacies distribution of tertiary slope sedimentary rocks in the Western Mississippi Canyon area  

SciTech Connect

The distribution of upper Tertiary, sandstone-prone, deep-water sedimentary rocks from the vicinity of Cognac field, Mississippi Canyon (MC) 194, south of Mars field (MC763) is presented based on an integrated sequence stratigraphic analysis of seismic, well log, and biostratigraphic data. Paleo-salt distributions were reconstructed by plotting the changing positions of depocenters on five isopach maps generated from six key sequence boundaries. Depositional trends, projected under allochthonous salt sheets, indicated subsalt prospectivity. Sixteen sequences were interpreted and subdivided into three lowstand depositional units (basin-floor fan, slope fan, and prograding wedge). Thirty isochron/seismic facies maps were made to reveal the stratigraphic pattern through the late Tertiary. During the early Miocene, a salt-rimmed syncline centered north of Mars field in MC455 accumulated sediments. The salt rim collapsed, creating a middle Miocene turtle structure. Middle-late Miocene sand-rich turbidites bypassed this structure and were deposited to the south around Mars field and beyond. At the same time, another depotrough 30 mi east of Mars field channeled deep-water sands to the MC730 area. A late Miocene-early Pliocene counterregional fault striking parallel to the shelf edge formed as salt evacuated the area on the south side of the Cognac (MC194) and Lena (MC280) fields. This fault trapped the Pliocene reservoir sandstones that produce in these fields. Sedimentation during the late Pliocene-early Pleistocene was very slow (0.2m/1,000 yr) and characterized by thin, stacked, condensed sections of hemipelagic shale. Since the mid-Pleistocene, the Mississippi River has supplied sediments to the Mississippi Canyon area that have induced salt deformation that has in turn affected recent sedimentation.

Hannan, A.E.; Risch, D.L.; Chowdhury, A.N. [Geco-Prakla, Inc., Houston, TX (United States)

1994-12-31T23:59:59.000Z

95

Methyl Bromide Recovery on Activated Carbon with Repeated Adsorption and Electrothermal Regeneration  

Science Journals Connector (OSTI)

The desorbed methyl bromide could then be recovered by condensation. ... The volume fraction of methyl bromide required to condense at 0 °C and atmospheric pressure is 0.895. ... To prevent the condensed methyl bromide from contacting air (and therefore evaporating), the methyl bromide was introduced under a layer of water inside the volumetric cylinder. ...

Jon D. Snyder; James G. Leesch

2001-05-24T23:59:59.000Z

96

Control of mercury methylation in wetlands through iron addition  

E-Print Network (OSTI)

Mason, R. P. ; Flegal, A. R. , Mercury speciation in the SanP. ; Flegal, A. R. , Decadal mercury trends in San FranciscoP. G. ; Nelson, D. C. , Mercury methylation from unexpected

Sedlak, David L; Ulrich, Patrick D

2009-01-01T23:59:59.000Z

97

Methyl bromide emissions to the atmosphere from temperate woodland ecosystems   

E-Print Network (OSTI)

The environmental importance of methyl bromide (CH3Br) arises from its contribution to stratospheric ozone loss processes and, as a consequence, its emissions from anthropogenic sources are subject to the Montreal Protocol. A better understanding...

Drewer, Julia; Heal, Kate V; Smith, Keith A; Heal, Mathew R

2008-01-01T23:59:59.000Z

98

The Genetics of de novo Methylation in Arabidopsis thaliana  

E-Print Network (OSTI)

domains akin to UHRF1 and the VIM proteins. These proteinsthe VARIANT IN METHYLATION (VIM) family. In higher orderUHRF1 in mammal or the VIM proteins in plants. UHRF1/VIM

Greenberg, Maxim Van Cleef

2012-01-01T23:59:59.000Z

99

Graft polymerization of methyl methacrylate onto short leather fibers  

Science Journals Connector (OSTI)

In this work, the graft polymerization of methyl methacrylate (MMA) monomer onto short leather fibers (SLF) was investigated as a function of the ... grafting efficiency) were determined. Composites formulated wi...

T. J. Madera-Santana; F. Vázquez Moreno

1999-03-01T23:59:59.000Z

100

The synthesis of some N-methylated aminoalkylphosphonic acids  

E-Print Network (OSTI)

(XLIII) were o heated with diethyl hydrogenphosphonate (XVI) at approximately 100 until the evolution of dimethylarnine (XXX) ceased. The 1-dimethyl- amino 1-alkenes (XLIV) reacted exothermically with diethyl hydro- genphosphonate (XVI) once... exothermically with methyl iodide at room temperature whereas the other eaters, which contained more bulky (R) substituents, did not. Secondly, the betaine obtained m the highest yield, N, N, N-trimethyl-N-(phosphono- methyl)ammonium hydroxide, mner salt...

Eikenberry, Jon Nathan

1966-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Critical Reviews in Environmental Science and Technology, 00(0):000000 (2001) 1064-3389/01/$.50  

E-Print Network (OSTI)

-3389/01/$.50 © 2001 by CRC Press LLC The Transport and Fate of Ethanol and BTEX in Groundwater Contaminated by Gasohol water contamination by methyl tert-butyl ether (MTBE) have made policymakers more cognizant of the need). It has been discovered that MTBE is a ubiquitous contaminant in surface and ground waters throughout

Alvarez, Pedro J.

102

Neutron scattering investigations on methyl group dynamics in polymers.  

E-Print Network (OSTI)

Among the different dynamical processes that take place in polymers, methyl group rotation is perhaps the simplest one, since all the relevant interactions on the methyl group can be condensed in an effective mean-field one-dimensional potential. Recent experimental neutron scattering results have stimulated a new revival of the interest on methyl group dynamics in glasses and polymer systems. The existence of quantum rotational tunnelling of methyl groups in polymers was expected for a long time but only very recently (1998), these processes have been directly observed by high-resolution neutron scattering techniques. This paper revises and summarizes the work done on this topic over last ten years by means of neutron scattering. It is shown that the results obtained in many chemically and structurally different polymers can be consistently described in the whole temperature range — from the quantum tunnelling limit to the classical hopping regime — as well as in the librational spectrum, in terms of the Rotation Rate Distribution Model (RRDM), which was first proposed in 1994. This model introduces a distribution of potential barriers for methyl group rotation, which is associated to the disorder present in any structural glass. The molecular and structural origin of the barrier distribution in polymers is discussed on the basis of a huge collection of investigations reported in the literature, including recent fully atomistic molecular dynamics simulations.

Juan Colmenero; Angel J. Moreno; Angel Alegría

2005-01-01T23:59:59.000Z

103

Natural gas accumulations in low-permeability Tertiary, and Cretaceous (Campanian and Maastrichtian) rock, Uinta Basin, Utah  

SciTech Connect

This report characterizes Upper Cretaceous Campanian and Maastrichtian, and lower Tertiary gas-bearing rocks in the Uinta Basin with special emphasis on those units that contain gas in reservoirs that have been described as being tight. The report was prepared for the USDOE whose Western Tight Gas Sandstone Program cofunded much of this research in conjunction with the US Geological Survey's Evolution of Sedimentary Basins, and Onshore Oil and Gas Programs. (VC)

Fouch, T.D.; Wandrey, C.J.; Pitman, J.K.; Nuccio, V.F.; Schmoker, J.W.; Rice, D.D.; Johnson, R.C.; Dolton, G.L.

1992-02-01T23:59:59.000Z

104

Natural gas accumulations in low-permeability Tertiary, and Cretaceous (Campanian and Maastrichtian) rock, Uinta Basin, Utah. Final report  

SciTech Connect

This report characterizes Upper Cretaceous Campanian and Maastrichtian, and lower Tertiary gas-bearing rocks in the Uinta Basin with special emphasis on those units that contain gas in reservoirs that have been described as being tight. The report was prepared for the USDOE whose Western Tight Gas Sandstone Program cofunded much of this research in conjunction with the US Geological Survey`s Evolution of Sedimentary Basins, and Onshore Oil and Gas Programs. (VC)

Fouch, T.D.; Wandrey, C.J.; Pitman, J.K.; Nuccio, V.F.; Schmoker, J.W.; Rice, D.D.; Johnson, R.C.; Dolton, G.L.

1992-02-01T23:59:59.000Z

105

Anhydrous aluminum chloride as an alkylation catalyst: identification of mono- and dialkyl-benzenes from the condensation of tertiary butyl alcohol with benzene.  

E-Print Network (OSTI)

LIBRARY a a w c"I. I. SI - O~ TI:YAf ANHYDROUS ALUMINUM CHLORIDE AS AN ALKYLATION CATALYST: IDENTIFICATION OF MONO- AND DIALKYIZENZENES FROM THE CONDENSATION QF TERTIARY BUTYL ALCOHOL WITH BENKENE IACEY EUGENE SCOGGINS 4 A Thesis Submitted...: IDENTIFICATION OF MONO- AND DI~NZZNES FROM THE CONDENSATION OF TERTIARY BUTYL ALCOHOL WITH BENZENE A Thesis By LACEY EUGENE SCOGGINS Approved as to style and content hy: Chairman of Committee Head of Chemistry Department 1959 ACKNOWLEDGME1VTS The author...

Scoggins, Lacey E

1959-01-01T23:59:59.000Z

106

Average Conformations Determined from PRE Data Provide High-Resolution Maps of Transient Tertiary Interactions in Disordered Proteins  

Science Journals Connector (OSTI)

In the last decade it has become evident that disordered states of proteins play important physiological and pathological roles and that the transient tertiary interactions often present in these systems can play a role in their biological activity. The structural characterization of such states has so far largely relied on ensemble representations, which in principle account for both their local and global structural features. However, these approaches are inherently of low resolution due to the large number of degrees of freedom of conformational ensembles and to the sparse nature of the experimental data used to determine them. Here, we overcome these limitations by showing that tertiary interactions in disordered states can be mapped at high resolution by fitting paramagnetic relaxation enhancement data to a small number of conformations, which can be as low as one. This result opens up the possibility of determining the topology of cooperatively collapsed and hidden folded states when these are present in the vast conformational landscape accessible to disordered states of proteins. As a first application, we study the long-range tertiary interactions of acid-unfolded apomyoglobin from experimentally measured paramagnetic relaxation enhancement data.

Jordi Silvestre-Ryan; Carlos W. Bertoncini; Robert Bryn Fenwick; Santiago Esteban-Martin; Xavier Salvatella

2013-01-01T23:59:59.000Z

107

Seismic reflection evidence for two phase development of Tertiary basins from east-central Nevada  

SciTech Connect

Two east-west seismic reflection profiles crossing Antelope Valley, Smokey Valley, Railroad Valley and Big Sand Springs Valley demonstrate the evolution of Tertiary extension from broad sags to narrow, fault-bounded basins. Seismic reflection data was acquired for the Anschutz Corporation by the Digicon Corporation during the winter of 1988/1989. Reprocessing of a 480 channel, 60 fold, dynamite source experiment enabled good imaging of the basin stratigraphy. These data suggest two distinct phases of basin development occurred, separated by a regional unconformity. The early phase is characterized by development of a broad basin riddled with many small offset normal faults. The later phase shows a narrowing of the basin and subsidence along one dominant structure, an apparent planar normal fault. The unconformity separating the two phases of extension marks a transition from broad subsidence to local asymmetric tilting that took place over a short period of time relative to sedimentation rates. Antelope Valley and Railroad Valley clearly show strong evidence for two phase development, whereas Smokey Valley represents mostly the early phase and Big Sand Springs Valley represents only the later phase of extension. The absence of dating within the basins precludes the authors from determining if the abrupt tectonic transition within the basins resulted from differences in local strain rates or amounts, or was due to changes in regional stress fields.

Liberty, L.M.; Heller, P.L.; Smithson, S.B. (Univ. of Wyoming, Laramie, WY (United States). Dept. of Geology and Geophysics)

1993-04-01T23:59:59.000Z

108

Maturation of Tertiary sediments in the Asian Continental Margins: A basis for hydrocarbon generation studies  

SciTech Connect

In the marginal areas of the Asian continent, the Paleogene and Miocene coal-bearing formations are sporadically distributed. In some areas, particularly in the sea regions, their equivalents are possibly explored for oil and gas. The basins mainly formed as tectonic depressions, and are filled with fluvial to marine clastic rocks. The formations show marked lateral variation in thickness, lithology, and sediment characteristics, which are related to the geotectonic settings of the basins at active plate margins. Remarkable accumulation of overburden and high paleogeothermal conditions, which are marked in northern Kyushu, Japan, and Thailand, influenced diagenesis. Organic and inorganic maturation studies in northern Kyushu reveal a progress of diagenesis from the inland of Kyushu toward the sea region essentially controlled by additional heat supply from the sea region during and after sedimentation. The sediments on the land surface are chiefly overmatured, and/or contain minor amounts of organic carbon. High paleogeothermal influence on Tertiary maturation is clear also in northern Thailand. The high paleotemperature conditions in these areas may be related to tectonic interaction between the oceanic and continental plates.

Miki, Takashi (Kyushu Univ., Fukuoka (Japan))

1994-07-01T23:59:59.000Z

109

Factors controlling reservoir quality in tertiary sandstones and their significance to geopressured geothermal production  

SciTech Connect

Variable intensity of diagenesis is the factor primarily responsible for contrasting regional reservoir quality of Tertiary sandstones from the upper and lower Texas coast. Detailed comparison of Frio sandstone from the Chocolate Bayou/Danbury Dome area, Brazoria County, and Vicksburg sandstones from the McAllen Ranch Field area, Hidalgo County, reveals that extent of diagenetic modification is most strongly influenced by (1) detrital mineralogy and (2) regional geothermal gradients. The regional reservoir quality of Frio sandstones from Brazoria County is far better than that characterizing Vicksburg sandstones from Hidalgo County, especially at depths suitable for geopressured geothermal energy production. However, in predicting reservoir quality on a site-specific basis, locally variable factors such as relative proportions for porosity types, pore geometry as related to permeability, and local depositional environment must also be considered. Even in an area of regionally favorable reservoir quality, such local factors can significantly affect reservoir quality and, hence, the geothermal production potential of a specific sandstone unit.

Loucks, R.G.; Richmann, D.L.; Milliken, K.L.

1981-01-01T23:59:59.000Z

110

Interplay between Secondary and Tertiary Structure Formation in Protein Folding Cooperativity  

E-Print Network (OSTI)

Protein folding cooperativity is defined by the nature of the finite-size thermodynamic transition exhibited upon folding: two-state transitions show a free energy barrier between the folded and unfolded ensembles, while downhill folding is barrierless. A microcanonical analysis, where the energy is the natural variable, has shown better suited to unambiguously characterize the nature of the transition compared to its canonical counterpart. Replica exchange molecular dynamics simulations of a high resolution coarse-grained model allow for the accurate evaluation of the density of states, in order to extract precise thermodynamic information, and measure its impact on structural features. The method is applied to three helical peptides: a short helix shows sharp features of a two-state folder, while a longer helix and a three-helix bundle exhibit downhill and two-state transitions, respectively. Extending the results of lattice simulations and theoretical models, we find that it is the interplay between secondary structure and the loss of non-native tertiary contacts which determines the nature of the transition.

Tristan Bereau; Michael Bachmann; Markus Deserno

2011-07-01T23:59:59.000Z

111

THE TRENDS HIGH-CONTRAST IMAGING SURVEY. II. DIRECT DETECTION OF THE HD 8375 TERTIARY  

SciTech Connect

We present the direct imaging detection of a faint tertiary companion to the single-lined spectroscopic binary HD 8375 AB. Initially noticed as an 53 m s{sup -1} yr{sup -1} Doppler acceleration by Bowler et al., we have obtained high-contrast adaptive optics observations at Keck using NIRC2 that spatially resolve HD 8375 C from its host(s). Astrometric measurements demonstrate that the companion shares a common proper-motion. We detect orbital motion in a clockwise direction. Multiband relative photometry measurements are consistent with an early M-dwarf spectral type ({approx}M1V). Our combined Doppler and imaging observations place a lower-limit of m {>=} 0.297 M{sub Sun} on its dynamical mass. We also provide a refined orbit for the inner pair using recent radial velocity measurements obtained with the High Resolution Echelle Spectrometer. HD 8375 is one of many triple-star systems that are apparently missing in the solar neighborhood.

Crepp, Justin R. [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Johnson, John Asher; Yantek, Scott M. [Department of Astronomy, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Howard, Andrew W. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Marcy, Geoff W.; Isaacson, Howard [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Fischer, Debra A. [Department of Physics, Yale University, New Haven, CT 06511 (United States); Wright, Jason T.; Feng Ying, E-mail: jcrepp@nd.edu [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)

2013-07-01T23:59:59.000Z

112

Appendix A - Acronyms  

NLE Websites -- All DOE Office Websites (Extended Search)

A - ACRONYMS A - ACRONYMS AASHTO American Association of State Highway and Transportation Officials CNG Compressed Natural Gases CVO Commercial Vehicle Operation DOE Department of Energy DOT Department of Transportation E85 85% Ethanol, 15% Gasoline EPA Environmental Protection Agency ExFIRS Excise Files Information Retrieval System ExSTARS Excise Summary Terminal Activity Reporting System FHWA Federal Highway Administration FTA Federation of Tax Administrators GAO General Accounting Office HTF Highway Trust Fund IFTA International Fuel Tax Agreement IM Interstate Maintenance IRS Internal Revenue Service LNG Liquid Natural Gases LPG Liquefied Petroleum Gases M85 85% Methanol, 15% Gasoline MTBE Methyl Tertiary Butyl Ether NHS National Highway System ORNL Oak Ridge National Laboratory STP Surface Transportation Program

113

Total Blender Net Input of Petroleum Products  

U.S. Energy Information Administration (EIA) Indexed Site

Input Input Product: Total Input Natural Gas Plant Liquids and Liquefied Refinery Gases Pentanes Plus Liquid Petroleum Gases Normal Butane Isobutane Other Liquids Oxygenates/Renewables Methyl Tertiary Butyl Ether (MTBE) Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Renewable Diesel Fuel Other Renewable Fuels Unfinished Oils (net) Unfinished Oils, Naphthas and Lighter Unfinished Oils, Kerosene and Light Gas Oils Unfinished Oils, Heavy Gas Oils Residuum Motor Gasoline Blending Components (MGBC) (net) MGBC - Reformulated MGBC - Reformulated - RBOB MGBC - Reformulated, RBOB for Blending w/ Alcohol MGBC - Reformulated, RBOB for Blending w/ Ether MGBC - Reformulated, GTAB MGBC - Conventional MGBC - Conventional, CBOB MGBC - Conventional, GTAB MGBC - Other Conventional Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

114

Total Refinery Net Input of Crude Oil and Petroleum Products  

U.S. Energy Information Administration (EIA) Indexed Site

Input Input Product: Total Crude Oil & Petroleum Products Crude Oil Natural Gas Plant Liquids Pentanes Plus Liquefied Petroleum Gases Normal Butane Isobutane Other Liquids Hydrogen/Oxygenates/Renewables/Other Hydrocarbons Hydrogen Oxygenates (excl. Fuel Ethanol) Methyl Tertiary Butyl Ether (MTBE) All Other Oxygenates Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Renewable Diesel Fuel Other Renewable Fuels Other Hydrocarbons Unfinished Oils (net) Unfinished Oils, Naphthas and Lighter Unfinished Oils, Kerosene and Light Gas Oils Unfinished Oils, Heavy Gas Oils Residuum Motor Gasoline Blending Components (MGBC) (net) MGBC - Reformulated MGBC - Reformulated - RBOB MGBC - Reformulated, RBOB for Blending w/ Alcohol MGBC - Reformulated, RBOB for Blending w/ Ether MGBC - Conventional MGBC - CBOB MGBC - Conventional, GTAB MGBC - Other Conventional Aviation Gasoline Blending Components (net) Alaskan Crude Oil Receipts Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

115

Refinery & Blenders Net Input of Crude Oil  

U.S. Energy Information Administration (EIA) Indexed Site

Input Input Product: Total Crude Oil & Petroleum Products Crude Oil Natural Gas Plant Liquids and Liquefied Refinery Gases Pentanes Plus Liquefied Petroleum Gases Ethane Normal Butane Isobutane Other Liquids Hydrogen/Oxygenates/Renewables/Other Hydrocarbons Hydrogen Oxygenates (excl. Fuel Ethanol) Methyl Tertiary Butyl Ether (MTBE) All Other Oxygenates Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Renewable Diesel Fuel Other Renewable Fuels Other Hydrocarbons Unfinished Oils (net) Unfinished Oils, Naphthas and Lighter Unfinished Oils, Kerosene and Light Gas Oils Unfinished Oils, Heavy Gas Oils Residuum Motor Gasoline Blending Components (MGBC) (net) MGBC - Reformulated MGBC - Reformulated - RBOB MGBC - Reformulated, RBOB for Blending w/ Alcohol MGBC - Reformulated, RBOB for Blending w/ Ether MGBC - Reformulated, GTAB MGBC - Conventional MGBC - CBOB MGBC - Conventional, GTAB MGBC - Other Conventional Aviation Gasoline Blending Components (net) Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

116

Nested methylation-specific polymerase chain reaction cancer detection method  

DOE Patents (OSTI)

A molecular marker-based method for monitoring and detecting cancer in humans. Aberrant methylation of gene promoters is a marker for cancer risk in humans. A two-stage, or "nested" polymerase chain reaction method is disclosed for detecting methylated DNA sequences at sufficiently high levels of sensitivity to permit cancer screening in biological fluid samples, such as sputum, obtained non-invasively. The method is for detecting the aberrant methylation of the p16 gene, O 6-methylguanine-DNA methyltransferase gene, Death-associated protein kinase gene, RAS-associated family 1 gene, or other gene promoters. The method offers a potentially powerful approach to population-based screening for the detection of lung and other cancers.

Belinsky, Steven A. (Albuquerque, NM); Palmisano, William A. (Edgewood, NM)

2007-05-08T23:59:59.000Z

117

Effect of pressure on methylated glycine derivatives: relative roles of hydrogen bonds and steric repulsion of methyl groups  

Science Journals Connector (OSTI)

Phase transitions with fragmentation of the single crystals into fine powder were observed for partially methylated N-methyl and N,N-dimethylglycine, whereas the structural changes in N,N,N-trimethylglycine were continuous with some peculiar features in the 1.4-2.0 GPa pressure range, and accompanied by splitting of the crystals into several large fragments. Structural rearrangements in N-methylglycine and N,N,N-trimethylglycine were strongly dependent on the rate of pressure variation: the higher the rate of increasing pressure, the lower the pressure at which the phase transition occurred.

Kapustin, E.A.

2014-05-31T23:59:59.000Z

118

Environmental and age effects on methylation changes in human brain and blood cells  

E-Print Network (OSTI)

Previous studies have shown that DNA methylation may 1 e associated with disease, aging, the rate of aging and genetics. In this thesis, age is accurately predicted from DNA methylation in brain and blood tissues using two ...

Giguzinsky, Orit

2014-01-01T23:59:59.000Z

119

E-Print Network 3.0 - anhydride-vinyl methyl ether Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

4-Methyl-2-pentanol Other secondary alcohols... - quire handling with precautions. Acrolein tert-Butyl methyl ether Di(1-propynl) ether n... Methoxy-1,3,5,7- cyclooctatetraene...

120

Mercury (Hg) and methyl mercury (MMHg) bioaccumulation in three fish species (sea food) from Persian Gulf  

Science Journals Connector (OSTI)

In this study, mercury (Hg) and methyl mercury (MMHg) were determined in three fish species including benthic, benthopelagic and pelagic fish from Arvand river, northwest of Persian Gulf. Mercury and methyl mercu...

Sajad Abdolvand; Sahar Kayedinejad Esfahani…

2014-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Cyclic chronopotentiometric studies of the LiAl anode in methyl acetate  

Science Journals Connector (OSTI)

The applicability of methyl acetate as a solvent for ambient temperature lithium secondary batteries was investigated using cyclic chronopotentiometry. Methyl acetate was found to be stable towards lithium-alumin...

Y. S. Fung; H. C. Lai

1989-03-01T23:59:59.000Z

122

Effect of varying polyacrylamide molecular weight on tertiary oil recovery from porous media of varying permeability  

SciTech Connect

Three different molecular weight emulsion polyacrylamides (PAA) have been tested for their ability to recover oil from a multi-permeability Berea core system. Injection of a 6.5 x 10/sup 6/, 17 x 10/sup 6/, and 36 x 10/sup 6/ molecular weight PAA resulted in oil recovery from the multiple permeability core systems of 53.4, 63.7, and 57.2 percent of the waterflood residual oil, respectively. In tests with 15 g/kg Na/sub 2/CO/sub 3/, injection of the polymer systems resulted in recoveries of 65.6, 75.3, and 68.0 percent of the waterflood residual oil, respectively. In the presence of alkali, the injection of high molecular weight PAA resulted in the reduction of fluid flow into the medium and low permeability cores with 70 to 75 percent of the tertiary oil being recovered from the high permeability core. Decreasing the PAA molecular weight to 17 x 10/sup 6/ and subsequently to 6.5 x 10/sup 6/ resulted in an increasing amount of fluid flowing through the low and medium permeability cores. While decreasing the molecular weight of the PAA resulted in increased fluid diversion, the 6.5 x 10/sup 6/ molecular weight PAA recovery efficiency was less than either of the other two polymers in the high permeability core. The data indicates selection of too large a polymer can result in less than maximum oil recovery from a heterogeneous permeability reservoir as a result of lower sweep efficiency. Selection of too small a polymer can result in less than maximum oil recovery from a heterogeneous permeability reservoir as a result of decreased oil recovery from the high permeability zones. Proper selection of polyacrylamide for a heterogeneous permeability reservoir either in the presence or in the absence of alkali will maximize oil recovery.

Ball, J.T.; Pitts, M.J.

1984-04-01T23:59:59.000Z

123

Mercury Methylation by Planktonic and Biofilm Cultures of Desulfovibrio desulfuricans  

Science Journals Connector (OSTI)

Mercury Methylation by Planktonic and Biofilm Cultures of Desulfovibrio desulfuricans ... The similarity of the relationships in the presence and absence of a biofilm indicates that the existence of the biofilm does not appear to change the relative availability of the dominant mercuric sulfide species to SRB, which is consistent with our previous work with E. coli (18). ...

Chu-Ching Lin; Jennifer A. Jay

2007-09-01T23:59:59.000Z

124

Ultrafast photochemistry of methyl hydroperoxide on ice particles  

E-Print Network (OSTI)

Ultrafast photochemistry of methyl hydroperoxide on ice particles M. A. Kambouresa , S. AOOH, on water clusters produces a surprisingly wide range of products on a subpicosecond time scale | photodissociation Photoinduced processes at surfaces of water or ice are of interest in atmospheric chemistry

Nizkorodov, Sergey

125

Phase 1 Methyl Iodide Deep-Bed Adsorption Tests  

SciTech Connect

Nuclear fission results in the production of fission products (FPs) and activation products including iodine-129, which could evolve into used fuel reprocessing facility off-gas systems, and could require off-gas control to limit air emissions to levels within acceptable emission limits. Research, demonstrations, and some reprocessing plant experience have indicated that diatomic iodine can be captured with efficiencies high enough to meet regulatory requirements. Research on the capture of organic iodides has also been performed, but to a lesser extent [Jubin 2012b]. Several questions remain open regarding the capture of iodine bound in organic compounds. Deep-bed methyl iodide adsorption testing has progressed according to a multi-laboratory methyl iodide adsorption test plan. This report summarizes the first phase of methyl iodide adsorption work performed according to this test plan using the deep-bed iodine adsorption test system at the Idaho National Laboratory (INL), performed during Fiscal Year (FY) 2013 and early FY-2014. Testing has been performed to address questions posed in the test plan, and followed the testing outline in the test plan. Tests established detection limits, developed procedures for sample analysis with minimal analytical interferences, and confirmed earlier results that show that the methyl iodide reacts when in contact with the AgZ sorbent, and not significantly in the gas flow upstream of the sorbent. The reaction(s) enable separation of the iodine from the organic moiety, so that the iodine can chemisorb onto the sorbent. The organic moiety can form other compounds, some of which are organic compounds that are detected and can be tentatively identified using GC-FID and GCMS. Test results also show that other gas constituents (NOx and/or H2O) can affect the methyl iodide reactions. With NOx and H2O present in the gas stream, the majority of uncaptured iodine exiting iodine-laden sorbent beds is in the form of I2 or HI, species that are soluble in NaOH scrubbing solution for iodine analysis. But when NOx and H2O are not present, then the majority of the uncaptured iodine exiting iodine-laden sorbent is in the form of methyl iodide. Methyl iodide adsorption efficiencies have been high enough so that initial DFs exceed 1,000 to 10,000. The methyl iodide mass transfer zone depths are estimated at 4-8 inches, possibly deeper than mass transfer zone depths estimated for I2 adsorption on AgZ. Additional deep-bed testing and analyses are recommended to (a) expand the data base for methyl iodide adsorption under various conditions specified in the methyl iodide test plan, and (b) provide more data for evaluating organic iodide reactions and reaction byproducts for different potential adsorption conditions.

Nick Soelberg; Tony Watson

2014-08-01T23:59:59.000Z

126

Assessing and Managing the Risks of Fuel Compounds: Ethanol Case Study  

SciTech Connect

We have implemented a suite of chemical transport and fate models that provide diagnostic information about the behavior of ethanol (denoted EtOH) and other fuel-related chemicals released to the environment. Our principal focus is on the impacts to water resources, as this has been one of the key issues facing the introduction of new fuels and additives. We present analyses comparing the transport and fate of EtOH, methyl tertiary butyl ether (MTBE), and 2,2,4 trimethyl pentane (TMP) for the following cases (1) discharges to stratified lakes, subsurface release in a surficial soil, (3) cross-media transfer from air to ground water, and (4) fate in a regional landscape. These compounds have significantly different properties that directly influence their behavior in the environment. EtOH, for example, has a low Henry's law constant, which means that it preferentially partitions to the water phase instead of air. An advantageous characteristic of EtOH is its rapid biodegradation rate in water; unlike MTBE or TMP, which degrade slowly. As a consequence, EtOH does not pose a significant risk to water resources. Preliminary health-protective limits for EtOH in drinking water suggest that routine releases to the environment will not result in levels that threaten human health.

Layton, D.W.; Rice, D.W.

2002-02-04T23:59:59.000Z

127

Use of Treated Municipal Wastewater as Power Plant Cooling System Makeup Water: Tertiary Treatment versus Expanded Chemical Regimen for Recirculating Water Quality Management  

SciTech Connect

Treated municipal wastewater is a common, widely available alternative source of cooling water for thermoelectric power plants across the U.S. However, the biodegradable organic matter, ammonia-nitrogen, carbonate and phosphates in the treated wastewater pose challenges with respect to enhanced biofouling, corrosion, and scaling, respectively. The overall objective of this study was to evaluate the benefits and life cycle costs of implementing tertiary treatment of secondary treated municipal wastewater prior to use in recirculating cooling systems. The study comprised bench- and pilot-scale experimental studies with three different tertiary treated municipal wastewaters, and life cycle costing and environmental analyses of various tertiary treatment schemes. Sustainability factors and metrics for reuse of treated wastewater in power plant cooling systems were also evaluated. The three tertiary treated wastewaters studied were: secondary treated municipal wastewater subjected to acid addition for pH control (MWW_pH); secondary treated municipal wastewater subjected to nitrification and sand filtration (MWW_NF); and secondary treated municipal wastewater subjected nitrification, sand filtration, and GAC adsorption (MWW_NFG). Tertiary treatment was determined to be essential to achieve appropriate corrosion, scaling, and biofouling control for use of secondary treated municipal wastewater in power plant cooling systems. The ability to control scaling, in particular, was found to be significantly enhanced with tertiary treated wastewater compared to secondary treated wastewater. MWW_pH treated water (adjustment to pH 7.8) was effective in reducing scale formation, but increased corrosion and the amount of biocide required to achieve appropriate biofouling control. Corrosion could be adequately controlled with tolytriazole addition (4-5 ppm TTA), however, which was the case for all of the tertiary treated waters. For MWW_NF treated water, the removal of ammonia by nitrification helped to reduce the corrosivity and biocide demand. Also, the lower pH and alkalinity resulting from nitrification reduced the scaling to an acceptable level, without the addition of anti-scalant chemicals. Additional GAC adsorption treatment, MWW_NFG, yielded no net benefit. Removal of organic matter resulted in pitting corrosion in copper and cupronickel alloys. Negligible improvement was observed in scaling control and biofouling control. For all of the tertiary treatments, biofouling control was achievable, and most effectively with pre-formed monochloramine (2-3 ppm) in comparison with NaOCl and ClO2. Life cycle cost (LCC) analyses were performed for the tertiary treatment systems studied experimentally and for several other treatment options. A public domain conceptual costing tool (LC3 model) was developed for this purpose. MWW_SF (lime softening and sand filtration) and MWW_NF were the most cost-effective treatment options among the tertiary treatment alternatives considered because of the higher effluent quality with moderate infrastructure costs and the relatively low doses of conditioning chemicals required. Life cycle inventory (LCI) analysis along with integration of external costs of emissions with direct costs was performed to evaluate relative emissions to the environment and external costs associated with construction and operation of tertiary treatment alternatives. Integrated LCI and LCC analysis indicated that three-tiered treatment alternatives such as MWW_NSF and MWW_NFG, with regular chemical addition for treatment and conditioning and/or regeneration, tend to increase the impact costs and in turn the overall costs of tertiary treatment. River water supply and MWW_F alternatives with a single step of tertiary treatment were associated with lower impact costs, but the contribution of impact costs to overall annual costs was higher than all other treatment alternatives. MWW_NF and MWW_SF alternatives exhibited moderate external impact costs with moderate infrastructure and chemical conditioner dosing, which makes them (especially

David Dzombak; Radisav Vidic; Amy Landis

2012-06-30T23:59:59.000Z

128

Control Study of Ethyl tert-Butyl Ether Reactive Distillation Muhammad A. Al-Arfaj  

E-Print Network (OSTI)

-butyl ether (ETBE) for gasoline blending as a replacement for methyl tert-butyl ether (MTBE) because and be blended with ETBE in the gasoline pool. Even for neat operation, if the conversion is low, the unconverted

Al-Arfaj, Muhammad A.

129

Small-angle neutron scattering study of poly(methyl methacrylate-block-sodium acrylate-block-methyl methacrylate) and poly(sodium acrylate-block-methyl methacrylate-block-sodium acrylate) triblock copolymers in aqueous solutions  

Science Journals Connector (OSTI)

?Small-angle neutron scattering experiments were made on poly(methyl methacrylate-block-sodium acrylate-block-methyl methacrylate) [p(MMA-b-NaA-b-MMA)] and p(NaA-b-MMA-b...-NaA) solutions by varying the compositi...

Szabolcs Vass; Kristina Haimer; Gerhard Meier…

2002-03-01T23:59:59.000Z

130

Investigating Sequestration Potential of Carbonate Rocks during Tertiary Recovery from a Billion Barrel Oil Field, Weyburn, Saskatchewan: the Geoscience Framework (IEA Weyburn CO2 Monitoring Project)  

NLE Websites -- All DOE Office Websites (Extended Search)

Sequestration Potential of Carbonate Rocks during Tertiary Sequestration Potential of Carbonate Rocks during Tertiary Recovery from a Billion Barrel Oil Field, Weyburn, Saskatchewan: the Geoscience Framework (IEA Weyburn CO 2 Monitoring and Storage Project) G. Burrowes (Geoffrey_Burrowes@pancanadian.ca; 403-290-2796) PanCanadian Resources 150 - 9 th Avenue S.W., P.O. Box 2850 Calgary, Alberta, Canada T2P 2S5 C. Gilboy (cgilboy@sem.gov.sk.ca; 306-787-2573) Petroleum Geology Branch, Saskatchewan Energy and Mines 201 Dewdney Avenue East Regina, Saskatchewan, Canada S4N 4G3 Introduction In Western Canada the application of CO 2 injection for enhanced, 'tertiary' oil recovery is a relatively recent addition to the arsenal available to reservoir engineers. The first successful application of CO 2 as a miscible fluid in Western Canada began in 1984 at Joffre Field, a

131

Global methylation responses to low dose radiation exposure  

NLE Websites -- All DOE Office Websites (Extended Search)

methylation responses to low dose radiation exposure methylation responses to low dose radiation exposure Pamela J Sykes, Michelle R Newman, Benjamin J Blyth and Rebecca J Ormsby Haematology and Genetic Pathology, Flinders University and Medical Centre, Flinders Centre for Cancer Prevention and Control, Bedford Park, Adelaide, South Australia 5042 Australia. (pam.sykes@flinders.edu.au). Our goal is to study the mechanisms involved in biological responses to low doses of radiation in vivo in the dose range that is relevant to population and occupational exposures. At high radiation doses, DNA double-strand breaks are considered the critical lesion underlying the initiation of radiation-induced carcinogenesis. However, at the very low radiation doses relevant for the general public, the induction of DNA double-strand breaks

132

Occurrence of Methyl Triclosan, a Transformation Product of the Bactericide Triclosan, in Fish from Various Lakes in Switzerland  

Science Journals Connector (OSTI)

Occurrence of Methyl Triclosan, a Transformation Product of the Bactericide Triclosan, in Fish from Various Lakes in Switzerland ... The bactericide triclosan and methyl triclosan, an environmental transformation product thereof, have been previously detected in lakes and a river in Switzerland. ... Both compounds are emitted via wastewater treatment plants (WWTPs), with methyl triclosan probably being formed by biological methylation. ...

Marianne E. Balmer; Thomas Poiger; Christian Droz; Kathrin Romanin; Per-Anders Bergqvist; Markus D. Müller; Hans-Rudolf Buser

2003-12-06T23:59:59.000Z

133

Role of methyl nitrate in plasma exhaust treatment  

SciTech Connect

There is growing interest in the use of a nonthermal plasma combined with a catalyst for NO{sub x} removal from diesel engine exhaust streams. Such exhaust streams contain excess oxygen (typically 6--10%), low concentrations of hydrocarbons (typically 100--1,000 ppm), and significant concentrations of water (typically 5--12%). Conversion of NO{sub x} to environmentally acceptable compounds, without requiring a scrubber or an added reductant, is the desired end result. In their research the authors observe the formation of substantial amounts of methyl nitrate (CH{sub 3}ONO{sub 2}) in the plasma-catalyst system. CH{sub 3}ONO{sub 2} was prepared and added to the gas blend on test equipment simulating a diesel exhaust gas. A dielectric barrier plasma discharge was followed by a zeolite-based catalyst. Methyl nitrate introduced upstream of the plasma discharge is largely unreacted upon passing through the plasma. CH{sub 3}ONO{sub 2} arriving at the catalyst is converted to methanol and NO{sub 2}. While methyl nitrate was shown to be formed in this system, it is not a significant intermediate in the mechanism of conversion of NO{sub x} to nitrogen.

Hoard, J.W.; Wallington, T.J.; Ball, J.C.; Hurley, M.D.; Wodzisz, K.; Balmer, M.L.

1999-10-01T23:59:59.000Z

134

"Seeing" Mercury Methylation in Progress  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury in the environment can easily reach toxic levels. In a process called methylation, Hg is transformed into a form that can be accumulated in the muscle and fatty tissue of fish. Accumulated levels of methylmercury become higher as the fish grow, and levels are magnified up the food web as larger fish eat smaller fish, a process called biomagnification. As a result, mercury concentrations in fish can be millions of times higher than in surrounding waters [1]. Fish advisories have been set to limit consumption of certain fish higher up on the food web, especially for pregnant women and small children (see Figure 1). Mercury in the environment can easily reach toxic levels. In a process called methylation, Hg is transformed into a form that can be accumulated in the muscle and fatty tissue of fish. Accumulated levels of methylmercury become higher as the fish grow, and levels are magnified up the food web as larger fish eat smaller fish, a process called biomagnification. As a result, mercury concentrations in fish can be millions of times higher than in surrounding waters [1]. Fish advisories have been set to limit consumption of certain fish higher up on the food web, especially for pregnant women and small children (see Figure 1). figure 1 Figure 1. Mercury health risks Health advisory from the CALFED Science Program to limit consumption of fish, in order to avoid excessive accumulation of Hg. Methylated Hg is biomagnified up the food chain, attaining high levels in some types of sportfish. http://science.calwater.ca.gov/images/scinews_hg_da_lg.jpg

135

E-Print Network 3.0 - anhydroecgonine methyl ester Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Idaho Collection: Environmental Sciences and Ecology 9 A Novel Post-translational Modification of Yeast Elongation Factor 1A Summary: that is released as volatile methyl groups...

136

Protein arginine methyltransferase 1 regulates herpes simplex virus replication through ICP27 RGG-box methylation  

SciTech Connect

Protein arginine methylation is involved in viral infection and replication through the modulation of diverse cellular processes including RNA metabolism, cytokine signaling, and subcellular localization. It has been suggested previously that the protein arginine methylation of the RGG-box of ICP27 is required for herpes simplex virus type-1 (HSV-1) viral replication and gene expression in vivo. However, a cellular mediator for this process has not yet been identified. In our current study, we show that the protein arginine methyltransferase 1 (PRMT1) is a cellular mediator of the arginine methylation of ICP27 RGG-box. We generated arginine substitution mutants in this domain and examined which arginine residues are required for methylation by PRMT1. R138, R148 and R150 were found to be the major sites of this methylation but additional arginine residues serving as minor methylation sites are still required to sustain the fully methylated form of ICP27 RGG. We also demonstrate that the nuclear foci-like structure formation, SRPK interactions, and RNA-binding activity of ICP27 are modulated by the arginine methylation of the ICP27 RGG-box. Furthermore, HSV-1 replication is inhibited by hypomethylation of this domain resulting from the use of general PRMT inhibitors or arginine mutations. Our data thus suggest that the PRMT1 plays a key role as a cellular regulator of HSV-1 replication through ICP27 RGG-box methylation.

Yu, Jungeun; Shin, Bongjin; Park, Eui-Soon; Yang, Sujeong; Choi, Seunga [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of) [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of); BK21 Bio Brain Center, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of); Kang, Misun [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of)] [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of); Rho, Jaerang, E-mail: jrrho@cnu.ac.kr [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of) [Department of Microbiology, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of); BK21 Bio Brain Center, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of); GRAST, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejon 305-764 (Korea, Republic of)

2010-01-01T23:59:59.000Z

137

E-Print Network 3.0 - arginine methylated miwi Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

2005 IEEE Intrinsic Disorder and Protein Modifications Summary: studies methylated proteins and describes methods of building a predictor for arginine and lysine... arginine...

138

Structures, intermolecular rotation barriers, and thermodynamic properties of chlorinated methanols and chlorinated methyl hydroperoxides.  

E-Print Network (OSTI)

??Thermochemical property data on chlorinated methanols and methyl hydroperoxides are important in oxidation, combustion and atmospheric photochemistry of chlorocarbons, Enthalpy, entropy, and heat capacities are… (more)

Sun, Hongyan

2000-01-01T23:59:59.000Z

139

Pressure dependence of tunneling and librational modes of coupled methyl groups in lithium acetate  

Science Journals Connector (OSTI)

The pressure dependence of the tunneling and librational modes of the coupled methyl groups in lithium acetate dihydrate was studied by inelastic neutron scattering...

A. Heidemann; J. Eckert; L. Passell…

1987-01-01T23:59:59.000Z

140

Tunneling of coupled methyl groups in lithium acetate: The isotope effect  

Science Journals Connector (OSTI)

We studied by high resolution inelastic neutron scattering the isotope effect of tunneling of coupled methyl groups in lithium acetate dihydrate (LIAC). Fully protonated, fully...

A. Heidemann; H. Friedrich; E. Günther…

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

High energy beam impact tests on a LHC tertiary collimator at the CERN high-radiation to materials facility  

Science Journals Connector (OSTI)

The correct functioning of a collimation system is crucial to safely operate highly energetic particle accelerators, such as the Large Hadron Collider (LHC). The requirements to handle high intensity beams can be demanding. In this respect, investigating the consequences of LHC particle beams hitting tertiary collimators (TCTs) in the experimental regions is a fundamental issue for machine protection. An experimental test was designed to investigate the robustness and effects of beam accidents on a fully assembled collimator, based on accident scenarios in the LHC. This experiment, carried out at the CERN High-Radiation to Materials (HiRadMat) facility, involved 440 GeV proton beam impacts of different intensities on the jaws of a horizontal TCT. This paper presents the experimental setup and the preliminary results obtained, together with some first outcomes from visual inspection and a comparison of such results with numerical simulations.

Marija Cauchi; O. Aberle; R.?W. Assmann; A. Bertarelli; F. Carra; K. Cornelis; A. Dallocchio; D. Deboy; L. Lari; S. Redaelli; A. Rossi; B. Salvachua; P. Mollicone; N. Sammut

2014-02-24T23:59:59.000Z

142

Review and reconnaissance of the hydrogeology of Tertiary sedimentary rocks in the vicinity of Frenchman Flat, Nevada Test Site  

SciTech Connect

Work is currently underway within the Underground Test Area (UGTA) subproject of the US Department of Energy/Nevada Operations Office Environmental Restoration Program to develop corrective action plans in support of the overall corrective action strategy for the Nevada Test Site (NTS) as established in the Federal Facility Agreement and Consent Order (FFACO, 1996). A closure plan is currently being developed for Frenchman Flat, which has been identified in the FFACO as a Corrective Action Unit (CAU). Part of this effort requires that hydrogeologic data be compiled for inclusion in a CAU-specific hydrologic flow and transport model that will be used to predict contaminant boundaries. Hydrogeologic maps and cross sections are currently being prepared for use in the model to define the nature and extent of aquifers and confining units that might influence the flow of contaminated groundwater from underground nuclear tests conducted in Frenchman Flat. During this effort, it has been found that older Tertiary-age sediments might be hydrogeologically important in the Frenchman Flat model area. Although the character and extent of these units are poorly known, there is reason to believe that in some parts of Frenchman Flat they may lie between the regional Lower Carbonate Aquifer (LCA) and the younger Tertiary saturated alluvium and volcanic units in which several underground nuclear tests were conducted. It was not possible to quickly determine their extent, or ascertain whether or not these units might act as confining units or aquifers. The work described in this report was done to gain a better understanding of the hydrogeology of these rocks.

Prothro, L.B.; Drellack, S.L. Jr.

1997-09-01T23:59:59.000Z

143

Contrasting styles of Pre-Cenozoic and mid-Tertiary crustal evolution in northern Mexico: Evidence from deep crustal xenoliths from La Olivina  

SciTech Connect

The principal deep crustal rock types found at the La Olivina xenolith locality in southeastern Chihuahua, Mexico, are mafic granulites, paragneisses, and intermediate- to silicic-composition orthogneisses. These granulite facies xenoliths are interpreted in terms of two age groups, pre-Cenozoic and mid-Tertiary, based on previous ion probe dating of zircons from the xenoliths and on isotopic comparisons of the xenoliths to rocks of known age. The mafic granulites have Pb, Nd, and Sr isotopic compositions identical to those of Oligocene volcanic rocks from the La Olivina region. Compositionally, they are olivine-normative gabbroic cumulates, and they precipitated from two or more mid-Tertiary basalt to dacite or rhyolite assimilation/fractional crystallization series. Mineral assemblages in the xenoliths record pressures of {le} 7.2 kbar or depths of < 25 km. If these are the maximum pressures the rocks experienced and if the crust was > 35 km thick in Oligocene time as inferred from regional tectonic considerations, then the mafic granulites cannot be samples of basaltic magmas underplated near the crust-mantle boundary. The cumulate protoliths for the mafic granulites probably formed in magma chambers well above the Moho. The mafic granulites are plausibly ignimbrite fields of Mexico. Pre-Cenozoic and mid-Tertiary crustal evolution followed very different paths in northern Mexico. For example, Nd isotopic evidence for crustal recycling is much more evident in rocks associated with the Paleozoic convergence than in rocks produced during mid-Tertiary magmatism. Furthermore, mafic rocks are very rare in the pre-Cenozoic xenolith suite, but they dominate the mid-Tertiary one. The rarity of pre-Cenozoic mafic xenoliths suggests that Proterozoic and Paleozoic lower crust may have delaminated in response to crustal overthickening associated with the Ouachita collision event. 97 refs., 14 figs., 5 tabs.

Cameron, K.L.; Robinson, J.V.; Kuentz, D.C.; Collerson, K.D. [Univ. of California, Santa Cruz, CA (United States); Niemeyer, S. [Lawrence Livermore National Lab., CA (United States); Harmon, R.S. [NERC Isotope Geosciences Lab., Keyworth (United Kingdom); Bohlen, S.R. [Geological Survey, Menlo Park, CA (United States)

1992-11-10T23:59:59.000Z

144

Biodegradation of triclosan and formation of methyl-triclosan in activated sludge under aerobic conditions  

E-Print Network (OSTI)

Biodegradation of triclosan and formation of methyl-triclosan in activated sludge under aerobic Keywords: Triclosan Triclosan methyl Waste water treatment Aerobic transformation a b s t r a c t Triclosan of this compound has led to the elevated concentrations of triclosan in wastewater, wastewater treatment plants

Kolaei, Alireza Rezania

145

Mercury methylation in oxygen deficient zones of the oceans: No evidence for the predominance of anaerobes  

E-Print Network (OSTI)

Mercury methylation in oxygen deficient zones of the oceans: No evidence for the predominance Keywords: Methylmercury Oxygen minimum zone Arabian Sea Equatorial Eastern Pacific Mercury methylation Although a large fraction of the world's population is exposed to mercury through consumption of marine

Morel, François M. M.

146

Genome Sequence of Mercury-Methylating and Pleomorphic Desulfovibrio africanus strain Walvis Bay  

SciTech Connect

Desulfovibrio africanus strain Walvis Bay is an anaerobic sulfate-reducing bacterium capable of producing methylmercury (MeHg), a potent human neurotoxin. The mechanism of methylation by this and other organisms is unknown. We present the 4.2-Mb genome sequence to provide further insight into microbial mercury methylation and sulfate-reducing bacteria.

Brown, Steven D [ORNL; Wall, Judy D. [University of Missouri; Kucken, A M [University of Missouri, Columbia; Gilmour, C C [Smithsonian Environmental Research Center, Edgewater, MD; Podar, Mircea [ORNL; Brandt, Craig C [ORNL; Teshima, Hazuki [Los Alamos National Laboratory (LANL); Detter, J C [U.S. Department of Energy, Joint Genome Institute; Han, Cliff [Los Alamos National Laboratory (LANL); Land, Miriam L [ORNL; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Han, James [U.S. Department of Energy, Joint Genome Institute; Pennacchio, Len [U.S. Department of Energy, Joint Genome Institute; Nolan, Matt [U.S. Department of Energy, Joint Genome Institute; Pitluck, Samual [U.S. Department of Energy, Joint Genome Institute; Woyke, Tanja [ORNL; Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Palumbo, Anthony Vito [ORNL; Elias, Dwayne A [ORNL

2011-01-01T23:59:59.000Z

147

Characterization of the Deltaproteobacteria in contaminated and uncontaminated stream sediments and identification of potential mercury methylators  

SciTech Connect

Microbial communities were examined in surface stream sediments at 5 contaminated sites and 1 control site near Oak Ridge, TN, USA, to identify bacteria that could be contributing to mercury (Hg) methylation. The phylogenetic composition of the sediment bacterial community was examined over 3 quarterly sampling periods (36 samples) using 16S rRNA gene pyrosequencing. Only 3064 sequences (0.85% of the total community) were identified as Deltaproteobacteria, the only group known to methylate Hg, using the Ribosomal Database Project classifier at the 99% confidence threshold. Constrained ordination techniques indicated statistically significant positive linear correlations between Desulfobulbus spp., Desulfonema spp. and Desulfobacca spp. and methyl-Hg concentrations at the Hg-contaminated sites. In contrast, the distribution of organisms related to Byssovorax spp. was significantly correlated to inorganic carbon, nitrate and uranium concentrations but not to Hg or methyl-Hg. Overall, the abundance and richness of Deltaproteobacteria sequences were higher in uncontaminated sediments, while the majority of the members present at the contaminated sites were either known potential metal-reducers/methylators or metal tolerant species. Given the abundance relative to other known Hg methylators and the association with methyl-Hg, Desulfobulbus spp. is considered a prime candidate for involvement in Hg methylation in these streams.

Mosher, Jennifer [ORNL; Vishnivetskaya, Tatiana A [ORNL; Elias, Dwayne A [ORNL; Podar, Mircea [ORNL; Brooks, Scott C [ORNL; Brown, Steven D [ORNL; Brandt, Craig C [ORNL; Palumbo, Anthony Vito [ORNL

2012-01-01T23:59:59.000Z

148

-methyl-adenine: an epigenetic signal for DNA-protein interactions Didier Wion 1  

E-Print Network (OSTI)

, and pathogenic E. coli, Dam methylation is required for virulence. In - Proteobacteria, CcrM methylation, and has attracted ample interest because of its involvement in human disease 8 . In contrast 9 and alters DNA curvature 10 . Such structural effects can influence DNA-protein interactions

Boyer, Edmond

149

Epigenetic regulation, such as cy-tosine DNA methylation, is im-  

E-Print Network (OSTI)

The project mapped 100,000 synthetic RRBS reads from human chr21 directly to the fragments using RRBSProject 4 Epigenetic regulation, such as cy- tosine DNA methylation, is im- portant in gene regulation. Precise measurements of genome-wide DNA methylation at single-base resolution have only recently

Wang, Hsin-Min

150

et al. (2008) identified several additional methylation sites on FOXO1 that ap-  

E-Print Network (OSTI)

, it remains to be deter- mined how methylation alters the activity and posttranslational regulation. In this light, methylation could, therefore, play a very general role in the regulation of FOXO1 activity serve as a link between aging and age-related diseases such as diabe- tes and cancer. FOXO dysregulation

Hertel, Klemens J.

151

M3D: a kernel-based test for spatially correlated changes in methylation profiles  

Science Journals Connector (OSTI)

......properly cited. M3D: a kernel-based test for spatially correlated changes in methylation...shape, across pre-defined regions. The test statistic explicitly accounts for differences...analysis of methylation data. Empirical tests on real and simulated data sets show an......

Tom Mayo; Gabriele Schweikert; Guido Sanguinetti

2014-11-01T23:59:59.000Z

152

Sorption/Desorption Kinetics and Equilibria of Atrazine, Diuron, And Bensulfuron Methyl on Selected Soils  

E-Print Network (OSTI)

Sorption/Desorption Kinetics and Equilibria of Atrazine, Diuron, And Bensulfuron Methyl on Selected Soils M. Zhou, R. K. Trubey, T. M. Priester and T. H. Carski Sorption/desorption isotherm equilibria to diuron and bensulfuron methyl sorption. The low l/nd (isotherm slope for desorption) values showed

Sparks, Donald L.

153

NEUTRON SCATTERING STUDY OF METHYL GROUP ROTATION IN SOLID PARA-AZOXYANISOLE (PAA)  

E-Print Network (OSTI)

587 NEUTRON SCATTERING STUDY OF METHYL GROUP ROTATION IN SOLID PARA-AZOXYANISOLE (PAA) H. HERVET diffusion incohérente de neutrons, que dans le PAA solide les groupes méthyle sont animés d'un mouvement de that the methyl groups in solid PAA undergo random rotational motion around their three-fold axis

Paris-Sud XI, Université de

154

THE JOURNAL OF CHEMICAL PHYSICS 138, 054301 (2013) Photodissociation dynamics of the methyl perthiyl radical at 248 nm  

E-Print Network (OSTI)

the photodissociation of the methyl perthiyl radical CH3SS at 248 nm. The radical was produced by flash pyrolysis

Neumark, Daniel M.

155

Optical measurements of methyl group tunneling in molecular crystals: Temperature dependence of the nuclear spin conversion rate  

E-Print Network (OSTI)

) The tunneling methyl groups in dimethyl-s-tetrazine (DMST) doped single crystals of durene were investigated

156

Methyl-CpG island-associated genome signature tags  

DOE Patents (OSTI)

Disclosed is a method for analyzing the organismic complexity of a sample through analysis of the nucleic acid in the sample. In the disclosed method, through a series of steps, including digestion with a type II restriction enzyme, ligation of capture adapters and linkers and digestion with a type IIS restriction enzyme, genome signature tags are produced. The sequences of a statistically significant number of the signature tags are determined and the sequences are used to identify and quantify the organisms in the sample. Various embodiments of the invention described herein include methods for using single point genome signature tags to analyze the related families present in a sample, methods for analyzing sequences associated with hyper- and hypo-methylated CpG islands, methods for visualizing organismic complexity change in a sampling location over time and methods for generating the genome signature tag profile of a sample of fragmented DNA.

Dunn, John J

2014-05-20T23:59:59.000Z

157

High Temperature Chemical Kinetic Combustion Modeling of Lightly Methylated Alkanes  

SciTech Connect

Conventional petroleum jet and diesel fuels, as well as alternative Fischer-Tropsch (FT) fuels and hydrotreated renewable jet (HRJ) fuels, contain high molecular weight lightly branched alkanes (i.e., methylalkanes) and straight chain alkanes (n-alkanes). Improving the combustion of these fuels in practical applications requires a fundamental understanding of large hydrocarbon combustion chemistry. This research project presents a detailed high temperature chemical kinetic mechanism for n-octane and three lightly branched isomers octane (i.e., 2-methylheptane, 3-methylheptane, and 2,5-dimethylhexane). The model is validated against experimental data from a variety of fundamental combustion devices. This new model is used to show how the location and number of methyl branches affects fuel reactivity including laminar flame speed and species formation.

Sarathy, S M; Westbrook, C K; Pitz, W J; Mehl, M

2011-03-01T23:59:59.000Z

158

Modelling Study of the Low-Temperature Oxidation of Large Methyl Esters J. Biet, V. Warth, O. Herbinet*  

E-Print Network (OSTI)

-decane / methyl palmitate mixture in a jet-stirred reactor. This paper also presents the construction and a comparison of models for methyl esters from C7 up to C17 in terms of conversion in a jet-stirred reactor, the development of renewable energy is more vital than ever [1,2]. The production of biofuels such as methyl

Paris-Sud XI, Université de

159

Distribution of hazardous air pollutant trace elements, total sulfur, and ash in coals from five Tertiary basins in the Rocky Mountain Region  

SciTech Connect

Arithmetic mean values of the contents of hazardous air pollutant (HAP) trace elements named in the 1990 Clean Air Act Amendments (antimony, arsenic, beryllium, cadmium, chromium, cobalt, lead, manganese, mercury, nickel, selenium, and uranium), ash, and total sulfur were statistically compared on a whole-coal basis for Paleocene coals from five Tertiary basins in the Rocky Mountain Region. The study of proximate and elemental analyses indicate a relationship between trace element contents and paleogeography.

Ellis, M.S.; Stricker, G.D.; Flores, R.M. [Geological Survey, Denver, CO (United States)

1994-12-31T23:59:59.000Z

160

Biostratigraphic, chronostratigraphic, and stratigraphic sequence analysis of Lower Tertiary marine sediments of Alabama for indicators of sea-level change  

SciTech Connect

Early Eocene to late Oligocene marine sedimentary units in southwestern Alabama were sampled at closely spaced intervals to derive a precise time-stratigraphic framework and to determine the paleoecological and mineralogical responses to fluctuations in sea level. Paleontologic control consisted of planktonic, smaller and larger benthonic foraminifera, calcareous nannofossils, dinoflagellates, and megafossils. Paleomagnetic reversals were delineated in two boreholes which, when supplemented by strontium isotope dates and the biostratigraphic control, provided a robust in situ chronostratigraphy for the Gulf Coast lower Tertiary. Paleoecologic trends in regression and transgression can be clearly correlated across major regional facies changes. Using the chronostratigraphy developed here, the second-, third-, and fourth-orders of Vail's global sea-level cycles can be recognized and demonstrate the influence of sea-level change on sedimentation. Stratigraphic systems tracts (SSTs) and bounding surfaces in outcrop were determined by lithologic variations and paleoecologic trends, and additionally by gamma logs in the cores. The lower sequence boundary occurs at a contact where an older, relatively fine-grained, deep-water, fossiliferous unit was abruptly succeeded by a coarse-grained, shallow-water, poorly fossiliferous unit. The transgressive surface occurs at the base of a fining- and deepening-upwards unit that was commonly glauconitic and very fossiliferous. Transgression culminated with a pulse of planktonic microfossils in a bed having reduced clastic sedimentation; on the log the surface of maximum starvation was marked by a gamma spike.

Thompson, P.R. (ARCO Oil and Gas Co., Plano, TX (United States)); Baum, G.R. (ARCO Alaska, Inc., Anchorage (United States))

1991-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Effect of use of low oxygenate gasoline blends upon emissions from California vehicles. Final report  

SciTech Connect

The objective of this project was to investigate the emissions effects of low-oxygenate gasoline blends on exhaust and evaporative emissions from a test fleet of California certified light-duty autos. Thirteen vehicles were procured and tested using four gasoline-oxygenate blends over three test cycles. The four gasoline blends were: Methyl Tertiary Butyl Ether (MTBE), Ethyl Tertiary Butyl Ether (ETBE), and 'match' and 'splash' blends of ethanol (in the 'match' blend the fuel Reid Vapor Pressure (RVP) is held constant, while in the 'splash' blend the fuel RVP is allowed to increase). Hydrocarbon and carbon monoxide exhaust emissions were generally reduced for the oxygenated blends, the exception being the 'splash-blended' ethanol gasoline which showed mixed results. Older technology vehicles (e.g., non-catalyst and oxidation catalyst) showed the greatest emissions reductions regardless of gasoline blend, while later technology vehicles showed the smallest reductions. Evaporative emissions and toxics were generally reduced for ETBE, while results for the other blends were mixed.

Born, G.L.; Lucas, S.V.; Scott, R.D.; DeFries, T.H.; Kishan, S.

1994-02-01T23:59:59.000Z

162

CRC fuel rating program: road octane performance of oxygenates in 1982 model cars  

SciTech Connect

Because of the widespread interest in the use of alcohols and ethers as gasoline blending components, this program was conducted to evaluate the effects of several oxygenates on gasoline octane performance and to evaluate the effects of car design features such as engine and transmission type. Five oxygenates were evaluated at two nominal concentrations, 5 and 10 volume%, at both regular- and premium-grade octane levels: methanol (MeOH), ethanol (ETOH), isopropanol (IPA), tertiary butanol (TBA), and methyl tertiary butyl ether (MTBE). A blend of 5% MeOH and 5 percent TBA was also tested at both octane levels. Twenty-eight unleaded fuels, including four hydrocarbon fuels, two hydrocarbon fuels plus toluene, and twenty-two oxygenated fuels, were rated in duplicate in thirty-eight cars using the Modified Uniontown Technique (CRC Designation F-28-75 described in Appendix C), plus some additional instructions. All testing was done on chassis dynamometers. Ratings were obtained at full throttle with all thirty-eight cars, and at the most critical part-throttle condition (occurring with manifold vacuum of 4 in. Hg (13.5 kPa) or greater above the full-throttle vacuum) with nine cars.

Not Available

1985-07-01T23:59:59.000Z

163

Genomic DNA methylation in various developmental stages of two plant pathogenic fungi  

E-Print Network (OSTI)

blotting procedure. The blots were then hybridized with DNA probes from the highly repeated Neurospora crassa rDNA repeat unit labeled with [a. P] dCTP in a random-primed oligolabeling reaction. Results of the hybridizations were visualized... shows s. high degree of methylation at the inner (3') C in both stages (mycelia and sclerotia) at the genomic level. The rRNA genes exhibit the same high level of methylation at the 3' C with the addition of some stage specific methylation...

Schliesing, Laura Jo

1990-01-01T23:59:59.000Z

164

Separation of methyl t-butyl ether from close boiling C[sub 5] hydrocarbons by extractive distillation  

SciTech Connect

A method for recovering methyl t-butyl ether from a mixture of methyl t-butyl ether and 1-pentene which comprises distilling a mixture of methyl t-butyl ether and 1-pentene in the presence of about one part of an extractive agent per part of methyl t-butyl ether -- 1-pentene mixture, recovering the 1-pentene as overhead product and obtaining the methyl t-butyl ether and the extractive agent from the still pot, wherein said extractive agent consists of one material selected from the group consisting of sulfolane, nitroethane, t-butanol, ethylene glycol diacetate, 1-methoxy-2-propanol acetate, methyl isoamyl ketone, ethylene glycol methyl ether, propylene glycol phenyl ether and diethyl malonate.

Berg, L.

1993-07-20T23:59:59.000Z

165

Bioremediation of the organophosphate methyl parathion using genetically engineered and native organisms  

E-Print Network (OSTI)

to remediate hazardous substances at significantly higher rates than found with natural systems. Specifically, degradation of methyl parathion (MP) by hydrolysis with a genetically engineered Escherichia coli was investigated along with degradation of one...

Diaz Casas, Adriana Z.

2005-11-01T23:59:59.000Z

166

Rotating disk sorptive extraction of triclosan and methyl-triclosan from water samples  

Science Journals Connector (OSTI)

A method of sample preparation based on use of rotating disk sorptive extraction (RDSE) has been developed for determination of triclosan (TCS) and methyl-triclosan (MTCS) in water samples. The sorptive...w/v), d...

Lourdes Jachero; Betsabet Sepúlveda; Inés Ahumada…

2013-09-01T23:59:59.000Z

167

X-ray and Neutron Scattering Studies of Methyl Iodide and Hydrogen Confined in Porous Media.  

E-Print Network (OSTI)

??X-ray diffraction was used to study the liquid - solid phase transition and structure of methyl iodide confined in porous GelTech© glass, with 25, 50… (more)

Glanville, Yvonne

2005-01-01T23:59:59.000Z

168

Aberrant Promoter Methylation and Silencing of Laminin-5-Encoding Genes in Breast Carcinoma  

Science Journals Connector (OSTI)

...cells, become motile, and subsequently force their path through surrounding obstacles...Alterations in DNA methylation: a fundamental aspect of neoplasia. Adv. Cancer Res...Breast Staging in AJCC Cancer Staging Handbook, Ed. 5 171-180, Lippincott-Raven...

Ubaradka G. Sathyanarayana; Asha Padar; Chun Xian Huang; Makoto Suzuki; Hisayuki Shigematsu; B. Nebiyou Bekele; and Adi F. Gazdar

2003-12-15T23:59:59.000Z

169

E-Print Network 3.0 - alternative 2-c-methyl-d-erythritol 4-phosphate...  

NLE Websites -- All DOE Office Websites (Extended Search)

A Cara L. Jenkins1 Summary: phosphoramidite. Tetrahedron Lett 28, 101-102. 19 Giner J-L & Ferris WV Jr (2002) Synthesis of 2-C-methyl-d-erythritol Source: Raines,...

170

Proton spin conversion of coupled methyl groups in lithium acetate studied by inelastic neutron scattering  

Science Journals Connector (OSTI)

The temperature dependence of the tunneling spectrum of methyl groups in lithium acetate dihydrate has been studied in the temperature...3 pairs which are isolated from each other. However, from the fact that the...

A. Heidemann; K. J. Abed; C. J. Barker…

1987-01-01T23:59:59.000Z

171

Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the Norwestern Atlantic  

E-Print Network (OSTI)

Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) are a distinctive class of marine organic compounds. They are naturally produced, they have a unique carbon structure, they are highly halogenated, and they bioaccumulate in ...

Pangallo, Kristin C

2009-01-01T23:59:59.000Z

172

Novel syngas-based process for methyl methacrylate  

SciTech Connect

Research Triangle Institute (RTI), Eastman Chemical Company, and Bechtel are developing a novel process for synthesis of methyl methacrylate (MMA) from coal-derived syngas, under a contract from the U.S. Department of Energy, Pittsburgh Energy Technology Center. This three-step process consists of synthesis of a propionate, its condensation with formaldehyde, and esterification of resulting methacrylic acid (MAA) with methanol to produce MMA. Eastman has focused on the research on propionate synthesis step. The resultant Mo catalysts work efficiently at much less severe conditions (170{degrees}C and 30 atm) than the conventional Ni catalysts (270{degrees}C and 180 atm). Bechtel has performed an extensive cost analysis, which shows that Eastman`s propionate synthesis process is competitive with other technologies to produce the anhydride. In the second step, RTI and Eastman have developed active and stable V-SI-P and Ta metal oxide catalysts for condensation reactions of propionates with formaldehyde. RTI has demonstrated a novel correlation among the catalyst acid-base properties, condensation reaction yield, and long-term catalyst activity. Current research focuses on enhancing the condensation reaction yields, acid-base properties, in situ condensation in a high- temperature, high-pressure (HTHP) slurry reactor, and alternate formaldehyde feedstocks. Based on Eastman and RTI laboratory reactor operating data, a cost estimate is also being developed for the integrated process.

Gogate, M.R.; Spivey, J.J. [Research Triangle Institute, Research Triangle Park, NC (United States); Zoeller, J.R. [Eastman Chemical Co., Kingsport, TN (United States); Choi, G.N. [Bechtel, Inc., San Francisco, CA (United States); Tam, S.S. [Bechtel, Inc., Houston, TX (United States); Tischer, R.E. [USDOE Pittsburgh Energy Technology Center, PA (United States); Srivastava, R.D. [Burns and Roe Services Corp., Pittsburgh, PA (United States)

1996-12-31T23:59:59.000Z

173

An evaluation of the 3M Organic Vapor Monitor #3500 as a short term exposure limit sampling device for acetone, methyl ethyl ketone, and methyl iso butyl ketone  

E-Print Network (OSTI)

. An exploded view of the monitor is illustrated in Figure 1. The theory of diffusive sampling considers a concentration gra- dient between the ambient air and the adsorbent to be the driving force for sampling. For the adsorption to be controlled by diffu...AN EVALUATION OF THE 3M ORGANIC VAPOR MONITOR 43500 AS A SHOR'I TERM EXPOSURE LIMIT SAMPLING DEVICE FOR ACETONE, METHYL ETHYL KETONE, AND METHYL ISO BUTYL KETONE A Thesis by LLOYD B. ANDREW III Submitted to the Graduate College of Texas ASM...

Andrew, Lloyd B.

2012-06-07T23:59:59.000Z

174

Radio-methyl vorozole and methods for making and using the same  

DOE Patents (OSTI)

Radiotracer vorozole compounds for in vivo and in vitro assaying, studying and imaging cytochrome P450 aromatase enzymes in humans, animals, and tissues and methods for making and using the same are provided. [N-radio-methyl] vorozole substantially separated from an N-3 radio-methyl isomer of vorozole is provided. Separation is accomplished through use of chromatography resins providing multiple mechanisms of selectivity.

Kim, Sung Won; Biegon, Anat; Fowler, Joanna S.

2014-08-05T23:59:59.000Z

175

Radio-methyl vorozole and methods for making and using the same  

DOE Patents (OSTI)

Radiotracer vorozole compounds for in vivo and in vitro assaying, studying and imaging cytochrome P450 aromatase enzymes in humans, animals, and tissues and methods for making and using the same are provided. [N-radio-methyl] vorozole substantially separated from an N-3 radio-methyl isomer of vorozole is provided. Separation is accomplished through use of chromatography resins providing multiple mechanisms of selectivity.

Kim, Sung Won; Biegon, Anat; Fowler, Joanna S.

2014-08-12T23:59:59.000Z

176

Storage effects on desorption efficiencies of methyl ethyl ketone and styrene collected on activated charcoal  

E-Print Network (OSTI)

efficier&cy nf methyl etiiy', Ketone and styrene monomer adsorbed on activated charcoal samples, and stored under isotherm&al condit'ions, were investigated as a function of storage time. The dependence of the storage time effects on the storage temp...- erature and compound concentration were also studied. Results showed no siqnif', cant storag&e time effects on adsorbed styrene after sixty days of storage. A very significant decrease in the desorption ef iciency of methyl ethyl ketone was observed...

Dommer, Richard Alvin

2012-06-07T23:59:59.000Z

177

Biofouling of reverse-osmosis membranes under different shear rates during tertiary wastewater desalination: Microbial community composition  

Science Journals Connector (OSTI)

Abstract We investigated the influence of feed-water shear rate during reverse-osmosis (RO) desalination on biofouling with respect to microbial community composition developed on the membrane surface. The RO membrane biofilm's microbial community profile was elucidated during desalination of tertiary wastewater effluent in a flat-sheet lab-scale system operated under high (555.6 s?1), medium (370.4 s?1), or low (185.2 s?1) shear rates, corresponding to average velocities of 27.8, 18.5, and 9.3 cm s?1, respectively. Bacterial diversity was highest when medium shear was applied (Shannon–Weaver diversity index H' = 4.30 ± 0.04) compared to RO-membrane biofilm developed under lower and higher shear rates (H? = 3.80 ± 0.26 and H? = 3.42 ± 0.38, respectively). At the medium shear rate, RO-membrane biofilms were dominated by Betaproteobacteria, whereas under lower and higher shear rates, the biofilms were dominated by Alpha- and Gamma- Proteobacteria, and the latter biofilms also contained Deltaproteobacteria. Bacterial abundance on the RO membrane was higher at low and medium shear rates compared to the high shear rate: 8.97 × 108 ± 1.03 × 103, 4.70 × 108 ± 1.70 × 103 and 5.72 × 106 ± 2.09 × 103 copy number per cm2, respectively. Interestingly, at the high shear rate, the RO-membrane biofilm's bacterial community consisted mainly of populations known to excrete high amounts of extracellular polymeric substances. Our results suggest that the RO-membrane biofilm's community composition, structure and abundance differ in accordance with applied shear rate. These results shed new light on the biofouling phenomenon and are important for further development of antibiofouling strategies for RO membranes.

Ashraf Al Ashhab; Osnat Gillor; Moshe Herzberg

2014-01-01T23:59:59.000Z

178

Experimental and Kinetic Modeling Study of Extinction and Ignition of Methyl Decanoate in Laminar Nonpremixed Flows  

SciTech Connect

Methyl decanoate is a large methyl ester that can be used as a surrogate for biodiesel. In this experimental and computational study, the combustion of methyl decanoate is investigated in nonpremixed, nonuniform flows. Experiments are performed employing the counterflow configuration with a fuel stream made up of vaporized methyl decanoate and nitrogen, and an oxidizer stream of air. The mass fraction of fuel in the fuel stream is measured as a function of the strain rate at extinction, and critical conditions of ignition are measured in terms of the temperature of the oxidizer stream as a function of the strain rate. It is not possible to use a fully detailed mechanism for methyl decanoate to simulate the counterflow flames because the number of species and reactions is too large to employ with current flame codes and computer resources. Therefore a skeletal mechanism was deduced from a detailed mechanism of 8555 elementary reactions and 3036 species using 'directed relation graph' method. This skeletal mechanism has only 713 elementary reactions and 125 species. Critical conditions of ignition were calculated using this skeletal mechanism and are found to agree well with experimental data. The predicted strain rate at extinction is found to be lower than the measurements. In general, the methyl decanoate mechanism provides a realistic kinetic tool for simulation of biodiesel fuels.

Seshadri, K; Lu, T; Herbinet, O; Humer, S; Niemann, U; Pitz, W J; Law, C K

2008-01-09T23:59:59.000Z

179

In Situ MTBE Biodegradation Supported by Diffusive Oxygen Release  

Science Journals Connector (OSTI)

Noted on the figure are the locations of some of the monitoring conducted as part of our project, notably transects A?C. ... Selected VOC samples were sent to Turtle Bayou Laboratories (Liberty, TX) for TBA analyses via GC/MS (estimated detection limit 1 ?g/L). ...

Ryan D. Wilson; Douglas M. Mackay; Kate M. Scow

2001-12-13T23:59:59.000Z

180

The Social Costs of an MTBE Ban in California  

E-Print Network (OSTI)

additive factors of the net loss in volume due to removal ofadditive factors of the net loss in volume due to removal of

Rausser, Gordon C.; Adams, Gregory D.; Montgomery, W. David; Smith, Anne E.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

The Social Costs of an MTBE Ban in California  

E-Print Network (OSTI)

and W.D. Montgomery. Oil Prices, Energy Security, and Importnew equilibrium world oil price and level of U.S. imports.to estimate the changes in oil prices that would result from

Rausser, Gordon C.; Adams, Gregory D.; Montgomery, W. David; Smith, Anne E.

2005-01-01T23:59:59.000Z

182

The Social Costs of an MTBE Ban in California  

E-Print Network (OSTI)

for crude oil. Ethanol also has lower energy density thangallon. 41 Ethanol also contains less energy per physicalbe replaced by ethanol. California Energy Commission, Staff

Rausser, Gordon C.; Adams, Gregory D.; Montgomery, W. David; Smith, Anne E.

2005-01-01T23:59:59.000Z

183

Hospital-acquired infection rate in a tertiary care teaching hospital in China: a cross-sectional survey involving 2434 inpatients  

Science Journals Connector (OSTI)

Summary A single-day hospital-acquired infections (HAIs) point prevalence study was conducted in a tertiary care hospital in China. The overall prevalence rate of \\{HAIs\\} was 3.53% (95% confidence interval 2.80–4.26%) among 2434 inpatients surveyed. Respiratory system infection was the most common type of HAI (49.43%), followed by surgical site infection (22.99%). The pathogen detection results for 50 patients showed Pseudomonas aeruginosa to account for 24.00% of isolates, followed by Klebsiella pneumoniae (14.00%) and Escherichia coli (14.00%).

Xiu-Bin Tao; Li-Hua Qian; Yan Li; Qun Wu; Jing-Jing Ruan; Dong-Zhen Cai; Hui Peng

2014-01-01T23:59:59.000Z

184

Biosynthesis and urinary excretion of methyl sulfonium derivatives of the sulfur mustard analog, 2-chloroethyl ethyl sulfide, and other thioethers  

SciTech Connect

Thioether methyltransferase was previously shown to catalyze the S-adenosylmethionine-dependent methylation of diemthyl selenide, dimethyl telluride, and various thioethers to produce the corresponding methyl onium ions. In this paper we show that the following thioethers are also substrates for this enzyme in vitro: 2-hydroxyethyl ethyl sulfide, 2-chloroethyl ethyl sulfide, thiodiglycol, t-butyl sulfide, and isopropyl sulfide. To demonstrate thioether methylation in vivo, mice were injected with (methyl-{sup 3}H)methionine plus different thioethers, and extracts of lungs, livers, kidneys, and urine were analyzed by high-performance liquid chromatography for the presence of ({sup 3}H)methyl sulfonium ions. The following thioethers were tested, and all were found to be methylated in vivo: dimethyl sulfide, diethyl sulfide, methyl n-propyl sulfide, tetrahydrothiophene, 2-(methylthio)ethylamine, 2-hydroxyethyl ethyl sulfide, and 2-chloroethyl ethyl sulfide. This supports our hypothesis that the physiological role of thioether methyltransferase is to methylate seleno-, telluro-, and thioethers to more water-soluble onium ions suitable for urinary excretion. Conversion of the mustard gas analog, 2-chloroethyl ethyl sulfide, to the methyl sulfonium derivative represents a newly discovered mechanism for biochemical detoxification of sulfur mustards, as this conversion blocks formation of the reactive episulfonium ion that is the ultimate alkylating agent for this class of compounds.

Mozier, N.M.; Hoffman, J.L. (Univ. of Louisville, KY (USA))

1990-12-01T23:59:59.000Z

185

Polystyrene/Poly(methyl methacrylate) Blends in the Presence of Cyclohexane: Selective Solvent Washing or Equilibrium Adsorption?  

E-Print Network (OSTI)

-cyclohexane (PS:CH), poly(methyl methacrylate)-carbon tetrachloride (PMMA:CCl4), and PS:CCl4 adsorbing

186

Geometric and Electronic Structures of the Ni(I) and Methyl-Ni(III)  

NLE Websites -- All DOE Office Websites (Extended Search)

9 9 Geometric and Electronic Structures of the Ni(I) and Methyl-Ni(III) Intermediates of Methyl-Coenzyme M Reductase Methyl-coenzyme M reductase (MCR) from methanogenic archaea catalyzes the terminal step in biological methane synthesis. Using coenzyme B (CoBSH) as the two-electron donor, MCR reduces methyl-coenzyme M (methyl-SCoM) to form methane and the heterodisulfide product, CoBS-SCoM. MCR contains an essential redox active nickel tetrapyrrolic cofactor called coenzyme F430 at its active site, which is active in the reduced Ni(I) state (MCRred1). All of the biologically generated methane, amounting to 1 billion tons per annum globally, is formed by MCR. Furthermore, recent evidence indicates that anaerobic methane oxidation is also catalyzed by MCR and occurs by a reversal of the methane synthesis reaction. Methane is a potent greenhouse gas, trapping 20 times more heat than CO2. In addition, methane is also an important and clean fuel as it produced the least amount of CO2 per unit of heat released. Thus, it is critically important to understand the mechanism of formation of the smallest hydrocarbon in nature.

187

Metathesis of tobacco fatty acid methyl esters: Generation of industrially important platform chemicals  

Science Journals Connector (OSTI)

Abstract Self-methathesis of vegetable oil based unsaturated fatty acids provide a renewable and convenient route for the preparation of a number of platform chemicals useful for the production of polymers, biolubricants and other industrial products. The present study is focused on the use of the unsaturated non-edible oil methyl esters of tobacco (Nicotiana tabacum 82.2%) self- metathesis. Metathesis was carried out reacting equimolar quantities of fatty acid methyl esters (6.8 mm) with Grubbs second generation catalyst (0.3 mm) at 40–45 °C for 36 h. The metathesized products were characterized using GC and GC–MS analysis. Self-metathesis of the tobacco methyl esters resulted in the formation of hydrocarbons, of which 9-octadecene (24%) and a cyclodecacyclododecene (19%) were found to be major. In addition 9-octadecenoic acid methyl ester (17%) and 9,12-octadecadienoic acid methyl esters (11%) were also observed. The study also discusses the molecules involved in the formation of the above intermediates which are useful for the preparation of a number of industrial products.

Yelchuri Vyshnavi; Rachapudi B.N. Prasad; Mallampalli S.L. Karuna

2013-01-01T23:59:59.000Z

188

Electron stimulated reactions of methyl iodide coadsorbed with amorphous solid water  

SciTech Connect

The electron stimulated reactions of methyl iodide (MeI) adsorbed on and suspended within amorphous solid water (ice) were studied using a combination of postirradiation temperature programmed desorption and reflection absorption infrared spectroscopy. For MeI adsorbed on top of amorphous solid water (ice), electron beam irradiation is responsible for both structural and chemical transformations within the overlayer. Electron stimulated reactions of MeI result principally in the formation of methyl radicals and solvated iodide anions. The cross section for electron stimulated decomposition of MeI is comparable to the gas phase value and is only weakly dependent upon the local environment. For both adsorbed MeI and suspended MeI, reactions of methyl radicals within MeI clusters lead to the formation of ethane, ethyl iodide, and diiodomethane. In contrast, reactions between the products of methyl iodide and water dissociation are responsible for the formation of methanol and carbon dioxide. Methane, formed as a result of reactions between methyl radicals and either parent MeI molecules or hydrogen atoms, is also observed. The product distribution is found to depend on the film's initial chemical composition as well as the electron fluence. Results from this study highlight the similarities in the carbon-containing products formed when monohalomethanes coadsorbed with amorphous solid water are irradiated by either electrons or photons.

Perry, C. C.; Faradzhev, N. S.; Madey, T. E.; Fairbrother, D. H. [Department of Chemistry, Oakwood College, Huntsville, Alabama 35896 (United States); Department of Physics and Astronomy, and Laboratory for Surface Modification, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8019 (United States); Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218 (United States)

2007-05-28T23:59:59.000Z

189

Sub-crop geologic map of pre-Tertiary rocks in the Yucca Flat and northern Frenchman Flat areas, Nevada Test Site, southern Nevada  

SciTech Connect

This map displays interpreted structural and stratigraphic relations among the Paleozoic and older rocks of the Nevada Test Site region beneath the Miocene volcanic rocks and younger alluvium in the Yucca Flat and northern Frenchman Flat basins. These interpretations are based on a comprehensive examination and review of data for more than 77 drillholes that penetrated part of the pre-Tertiary basement beneath these post-middle Miocene structural basins. Biostratigraphic data from conodont fossils were newly obtained for 31 of these holes, and a thorough review of all prior microfossil paleontologic data is incorporated in the analysis. Subsurface relationships are interpreted in light of a revised regional geologic framework synthesized from detailed geologic mapping in the ranges surrounding Yucca Flat, from comprehensive stratigraphic studies in the region, and from additional detailed field studies on and around the Nevada Test Site. All available data indicate the subsurface geology of Yucca Flat is considerably more complicated than previous interpretations have suggested. The western part of the basin, in particular, is underlain by relics of the eastward-vergent Belted Range thrust system that are folded back toward the west and thrust by local, west-vergent contractional structures of the CP thrust system. Field evidence from the ranges surrounding the north end of Yucca Flat indicate that two significant strike-slip faults track southward beneath the post-middle Miocene basin fill, but their subsurface traces cannot be closely defined from the available evidence. In contrast, the eastern part of the Yucca Flat basin is interpreted to be underlain by a fairly simple north-trending, broad syncline in the pre-Tertiary units. Far fewer data are available for the northern Frenchman Flat basin, but regional analysis indicates the pre-Tertiary structure there should also be relatively simple and not affected by thrusting. This new interpretation has implications for ground water flow through pre-Tertiary rocks beneath the Yucca Flat and northern Frenchman Flat areas, and has consequences for ground water modeling and model validation. Our data indicate that the Mississippian Chainman Shale is not laterally extensive confining unit in the western part of the basin because it is folded back onto itself by the convergent structures of the Belted Range and CP thrust systems. Early and Middle Paleozoic limestone and dolomite are present beneath most of both basins and, regardless of structural complications, are interpreted to form a laterally continuous and extensive carbonate aquifer. Structural culmination that marks the French Peak accommodation zone along the topographic divide between the two basins provides a lateral pathway through highly fractured rock between the volcanic aquifers of Yucca Flat and the regional carbonate aquifer. This pathway may accelerate the migration of ground-water contaminants introduced by underground nuclear testing toward discharge areas beyond the Nevada Test Site boundaries. Predictive three-dimensional models of hydrostratigraphic units and ground-water flow in the pre-Tertiary rocks of subsurface Yucca Flat are likely to be unrealistic due to the extreme structural complexities. The interpretation of hydrologic and geochemical data obtained from monitoring wells will be difficult to extrapolate through the flow system until more is known about the continuity of hydrostratigraphic units. 1 plate

Cole, J.C.; Harris, A.G.; Wahl, R.R.

1997-10-02T23:59:59.000Z

190

Two poplar methyl salicylate esterases display comparable biochemical properties but divergent expression patterns  

NLE Websites -- All DOE Office Websites (Extended Search)

Two Two poplar methyl salicylate esterases display comparable biochemical properties but divergent expression patterns Nan Zhao a , Ju Guan a , Farhad Forouhar b , Timothy J. Tschaplinski c , Zong-Ming Cheng a , Liang Tong b , Feng Chen a, * a Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Science Bldg., 2431 Joe Johnson Drive, Knoxville, TN 37996, USA b Department of Biological Sciences, Northeast Structural Genomics Consortium, Columbia University, New York, NY 10027, USA c Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA a r t i c l e i n f o Article history: Received 3 June 2008 Received in revised form 27 October 2008 Available online 10 January 2009 Keywords: Black cottonwood Populus trichocarpa Methyl esterase SABP2 Methyl salicylate Salicylic acid Gene family Molecular modeling a b s t r a c t Two genes encoding proteins

191

DOEEA-1157 ENVIRONlMENTAL ASSESSMENT METHYL CHLORIDE VIA OXYHYDROCHLOFUNATION OF METHANE:  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

57 57 ENVIRONlMENTAL ASSESSMENT METHYL CHLORIDE VIA OXYHYDROCHLOFUNATION OF METHANE: A BUILDING BLOCK FOR CHEMICALS AND FUELS FROM NATURAL GAS DOW CORNING CORPORATION CARROLLTON, KENTUCKY SEPTEMBER 1996 U.S. DEPARTMENT OF ENERGY PITTSBURGH ENERGY TECHNOLOGY CENTER CUM ~~~~~~~~ DOEEA-1157 ENVIRONlMENTAL ASSESSMENT METHYL CHLORIDE VIA OXYHYDROCHLORINATION OF METHANE: A BUILDING BLOCK FOR CHEMICALS AND FUELS FROM NATURAL GAS DOW CORNING CORPORATION CARROLLTON, KENTUCKY SEPTEMBER 1996 U.S. DEPARTMENT OF ENERGY PITTSBURGH ENERGY TECHNOLOGY CENTER Portions of this document may be illegible in electronic image products. Image are produced from the best available original document. &E/,Etq --,/s7 FINDING OF NO SIGNIFICANT IMPACT FOR THE PROPOSED METHYL CHLORIDE V

192

Experimental investigations on diesel engine fuelled with methyl esters of cotton seed oil  

Science Journals Connector (OSTI)

In this investigation, cotton seed methyl ester (CSME) was prepared by transesterification using potassium hydroxide (KOH) as catalyst. The engine performance was analysed with different blends of biodiesel and was compared with neat diesel. It was concluded that the lower blends of biodiesel are closer to diesel as far as thermal efficiency is concerned. In the lower blends, the brakes specific fuel consumption is also comparatively reduced. The smoke density also increases for the blends of methyl ester of cotton seed oil diesel compared to neat diesel operation. The oxides of nitrogen (NOx) emission level are decreased with the blends of methyl ester of cotton seed oil compared to neat diesel. The results proved that the use of biodiesel (produced from cotton seed oil) in compression ignition engine is a viable alternative to diesel.

M. Saravanan; A. Anbarasu; M. Loganathan

2013-01-01T23:59:59.000Z

193

The role of DNA methylation in catechol-enhanced erythroid differentiation of K562 cells  

SciTech Connect

Catechol is one of phenolic metabolites of benzene in vivo. Catechol is also widely used in pharmaceutical and chemical industries. In addition, fruits, vegetables and cigarette smoke also contain catechol. Our precious study showed that several benzene metabolites (phenol, hydroquinone, and 1,2,4-benzenetriol) inhibited erythroid differentiation of K562 cells. In present study, the effect of catechol on erythroid differentiation of K562 cells was investigated. Moreover, to address the role of DNA methylation in catechol-induced effect on erythroid differentiation in K562 cells, methylation levels of erythroid-specific genes were analyzed by Quantitative MassARRAY methylation analysis platform. Benzidine staining showed that exposure to catechol enhanced hemin-induced hemoglobin accumulation in K562 cells in concentration- and time-dependent manners. The mRNA expression of erythroid specific genes, including ?-globin, ?-globin, ?-globin, erythroid 5-aminolevulinate synthase, erythroid porphobilinogen deaminase, and transcription factor GATA-1 genes, showed a significant concentration-dependent increase in catechol-treated K562 cells. The exposure to catechol caused a decrease in DNA methylation levels at a few CpG sites in some erythroid specific genes including ?-globin, ?-globin and erythroid porphobilinogen deaminase genes. These results indicated that catechol improved erythroid differentiation potency of K562 cells at least partly via up-regulating transcription of some erythroid related genes, and suggested that inhibition of DNA methylation might be involved in up-regulated expression of some erythroid related genes. -- Highlights: ? Catechol enhanced hemin-induced hemoglobin accumulation. ? Exposure to catechol resulted in up-regulated expression of erythroid genes. ? Catechol reduced methylation levels at some CpG sites in erythroid genes.

Li, Xiao-Fei; Wu, Xiao-Rong; Xue, Ming; Wang, Yan; Wang, Jie; Li, Yang; Suriguga,; Zhang, Guang-Yao; Yi, Zong-Chun, E-mail: yizc@buaa.edu.cn

2012-11-15T23:59:59.000Z

194

Genomic DNA methylation at specific stages in the life cycle of two fungi  

E-Print Network (OSTI)

Member) John R, Gold (Member) J. A. ang (Head of De artment) August 1985 ABSTRACT Genomic DNA Methylation at Specific Stages in the Life Cycle of Two Fungi. (August 1985) Eldon Ralph Jupe, B. S. , Texas A df M University Chairman of Advisory... Member) John R, Gold (Member) J. A. ang (Head of De artment) August 1985 ABSTRACT Genomic DNA Methylation at Specific Stages in the Life Cycle of Two Fungi. (August 1985) Eldon Ralph Jupe, B. S. , Texas A df M University Chairman of Advisory...

Jupe, Eldon Ralph

2012-06-07T23:59:59.000Z

195

Aerogels and Polymorphism of Isotactic Poly(4-methyl-pentene-1)  

Science Journals Connector (OSTI)

Aerogels and Polymorphism of Isotactic Poly(4-methyl-pentene-1) ... Monolithic and highly crystalline aerogels of isotactic poly(4-methyl-pentene-1) (i-P4MP1) have been prepared by sudden solvent extraction with supercritical carbon dioxide from thermoreversible gels. ... Gels with cocrystalline phases lead to aerogels exhibiting the denser crystalline form II, whereas all the other considered gels lead to aerogels exhibiting the thermodynamically stable form I. Aerogels obtained from form I gels, which do not undergo a crystalline phase transition during the CO2 extraction process present the high structural stability most suitable for the preparation of porous membranes. ...

Christophe Daniel; Jenny G. Vitillo; Gianluca Fasano; Gaetano Guerra

2011-03-10T23:59:59.000Z

196

Lithium Methyl Carbonate as a Reaction Product of Metallic Lithiumand Dimethyl Carbonate  

SciTech Connect

To improve the understanding of passive film formation on metallic lithium in organic electrolyte, we synthesized and characterized lithium methyl carbonate (LiOCO{sub 2}CH{sub 3}), a prototypical component of the film. The chemical structure of this compound was characterized with Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR), and its thermal stability and decomposition pathway was studied by thermo-gravimetric analysis (TGA). The FTIR spectrum of chemically synthesized compound enabled us to resolve multiple products in the passive film on lithium in dimethyl carbonate (DMC). Lithium methyl carbonate is only one of the components, the others being lithium oxalate and lithium methoxide.

Zhuang, Guorong V.; Yang, Hui; Ross Jr., Philip N.; Xu, Kang; Jow, T. Richard

2005-10-16T23:59:59.000Z

197

Effects of Triclocarban, Triclosan, and Methyl Triclosan on Thyroid Hormone Action and Stress in Frog and Mammalian Culture Systems  

Science Journals Connector (OSTI)

Effects of Triclocarban, Triclosan, and Methyl Triclosan on Thyroid Hormone Action and Stress in Frog and Mammalian Culture Systems ... Triclosan (TCS) and triclocarban (TCC) are widely used broad spectrum bactericides that are common pollutants of waterways and soils. ... Methyl triclosan (mTCS) is the predominant bacterial TCS metabolite. ...

Ashley Hinther; Caleb M. Bromba; Jeremy E. Wulff; Caren C. Helbing

2011-05-16T23:59:59.000Z

198

An alternative approach to multiple testing for methylation QTL mapping reduces the proportion of falsely identified CpGs  

Science Journals Connector (OSTI)

......loci exist for DNA methylation and gene expression in human brain. PLoS Genet. (2010) 6:e1000952. Goeman JJ , Solari A...individual differences in gene-specific methylation in human brain. Am. J. Hum. Genet. (2010) 86:411-419. Supplementary......

René Luijk; Jelle J. Goeman; Eline P. Slagboom; Bastiaan T. Heijmans; Erik W. van Zwet

2014-10-01T23:59:59.000Z

199

The Acquisition of hMLH1 Methylation in Plasma DNA after Chemotherapy Predicts Poor Survival for Ovarian Cancer Patients  

Science Journals Connector (OSTI)

...these patients, 78 had died, giving the methylation study 74% power to detect a hazard ratio of 2 for the effect of acquired methylation...carcinoma. Proc Natl Acad Sci USA, 95: 6870-5, 1998. 23 De Wind N, Dekker M, van Rossum A, et al Mouse models for hereditary...

Gillian Gifford; Jim Paul; Paul A. Vasey; Stanley B. Kaye; and Robert Brown

2004-07-01T23:59:59.000Z

200

Syntrophs Dominate Sequences Associated with the Mercury Methylation-Related Gene hgcA in the Water Conservation Areas of the Florida Everglades  

Science Journals Connector (OSTI)

...methylation in this ecosystem. The dominant methylators...microorganisms in the aquatic environment: a critical...biogeochemistry in subtropical ecosystems. Lewis Publishers...in the South Florida ecosystem: distribution, sources...and management for restoration. Crit. Rev. Environ...

Hee-Sung Bae; Forrest E. Dierberg; Andrew Ogram

2014-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Synthesis of Signals for De Novo DNA Methylation in Neurospora crassa  

Science Journals Connector (OSTI)

...Tests of various 25- to 100-bp synthetic DNA sequences revealed that both T...developed a new system to test short synthetic DNA fragments for their potential...DNA methylation in N. crassa by synthetic DNA fragments a Plasmid designation...

Hisashi Tamaru; Eric U. Selker

2003-04-01T23:59:59.000Z

202

Methylation of Mercury by Bacteria Exposed to Dissolved, Nanoparticulate, and Microparticulate Mercuric Sulfides  

E-Print Network (OSTI)

Methylation of Mercury by Bacteria Exposed to Dissolved, Nanoparticulate, and Microparticulate in the environment is partly controlled by the bioavailability of inorganic divalent mercury (Hg(II)) to anaerobic matter to form chemical species that include organic-coated mercury sulfide nanoparticles as reaction

203

An experimental and detailed chemical kinetic modelling study of 2methyl furan oxidation  

E-Print Network (OSTI)

platform chemical 5hydroxymethylfurfural now a possibility [4], [5], [6] and [7]. 25DMF offers significantAn experimental and detailed chemical kinetic modelling study of 2methyl furan oxidation.55­1.65, initial temperatures of 298­398 K and atmospheric pressure. A detailed chemical kinetic mechanism

Paris-Sud XI, Université de

204

Chloromethane, Methyl Donor in Veratryl Alcohol Biosynthesis in Phanerochaete chrysosporium and Other Lignin-Degrading Fungi  

Science Journals Connector (OSTI)

...standard on a GE Omega 500-MHz NMR spectrometer, with 16...1 ppb (vol/vol) in the atmosphere (27). ACKNOWLEDGMENTS We...Analysis of human serum and plasma using the LKB 4400 amino acid...distribution of methyl chloride in the atmosphere. J. Geophys. Res. 85...

David B. Harper; John A. Buswell; James T. Kennedy; John T. G. Hamilton

1990-11-01T23:59:59.000Z

205

Combustion, performance and emission analysis of diesel engine fuelled with methyl esters of Pongamia oil  

Science Journals Connector (OSTI)

The methyl esters of vegetable oils, known as biodiesel are increasingly becoming popular because of their low environmental impact and potential as a green alternative fuel for diesel engine, and that they would not require significant modification of existing engine hardware. Methyl ester of Pongamia oil (PME) is derived through transesterification process. Experimental investigations have been carried out to examine properties, performance and emissions of different blends (B00, B20, B40, B60, B80 and B100) of PME comparison to diesel. A computer assisted single cylinder constant speed water cooled four stroke direct diesel engine (5 HP), which is commonly used in the agricultural sector for driving the pumps and small electrical generators is selected for the experimental investigation. The performance, emissions and combustion characteristics are analysed. The combustion parameters considered for this analysis are cylinder pressure and rate of heat release. The brake thermal efficiency is slightly reduced and hydrocarbon, carbon monoxide and smoke emissions in the exhaust are reduced when fuelled with methyl esters compared to diesel. But the NOx emissions are high when fuelled with methyl esters compared to diesel. [Received: December 11, 2009; Accepted: March 21, 2010

T. Hari Prasad; K. Hema Chandra Reddy; M. Muralidhara Rao

2010-01-01T23:59:59.000Z

206

Experimental and modeling study of the thermal decomposition of methyl decanoate  

E-Print Network (OSTI)

in internal combustion engines [2], [3], [4], [5] and [6]. Biodiesel fuels are composed of methyl esters) 1288-1300" DOI : 10.1016/j.combustflame.2010.11.009 #12;1. Introduction Fuel thermal decomposition are of importance in some practical cases such as diesel engines. The first reactions of diesel fuels

Paris-Sud XI, Université de

207

Selective Methylation Changes on the Bacillus subtilis Chemotaxis Receptor McpB Promote Adaptation*  

E-Print Network (OSTI)

. In the same background, McpB(E630D,E637D) produced methanol only upon aspara- gine addition, whereas McpB(Q371D,E630D) produced methanol only upon asparagine removal. Thus methanol release from Mcp, from which methanol is released in response to all stimuli. McpB has four putative methylation sites

Ordal, George W.

208

Arsenic methylation capacity and obesity are associated with insulin resistance in obese children and adolescents  

Science Journals Connector (OSTI)

Abstract The goal of the present study was to compare the arsenic methylation capacities in elementary school and junior high school students in an area of Taiwan with low arsenic exposure, and explore the influence of both arsenic methylation capacity and obesity on insulin resistance in these children and adolescents using the HOMA-IR index. We recruited 303 elementary school students and 319 junior high school students in Taipei City from September 2007 to November 2011. Concentrations of inorganic arsenic (arsenite?+?arsenate), monomethylarsonic acid (MMAV) and dimethylarsinic acid (DMAV) were determined by a high-performance liquid chromatography-linked hydride generator and atomic absorption spectrometry. Insulin resistance was determined by HOMA-IR. Elementary school students had significantly lower inorganic arsenic percentage and a higher DMAV percentage than junior high school students. It seems that the former had better arsenic methylation capability than the latter. The HOMA-IR value was significantly and positively related to the sum of the urinary inorganic and methylated arsenic (TotalAs) concentrations and also the BMI Z score, with the regression coefficients (?) being 0.058 (p?

Hsiu-Chen Lin; Yung-Kai Huang; Horng-Sheng Shiue; Liang-Sien Chen; Cheuk-Sing Choy; Shiau-Rung Huang; Bor-Cheng Han; Yu-Mei Hsueh

2014-01-01T23:59:59.000Z

209

Variations in Mg/Ca as a control on distribution of strontium concentrations and delta/sup 18/O in upper Tertiary dolomites from Bahamas  

SciTech Connect

Strontium concentrations and delta/sup 18/O are commonly used to infer the gross composition of dolomitizing waters, yet the bases for such inferences are not firmly established. A new approach to calibrating these 2 parameters is suggested from analyses of a section of upper Tertiary dolomites from the Bahamas. In an interval of dolomite, 120 m (394 ft) from a core taken on San Salvador Island, mole % MgCO/sub 3/ is correlated positively with delta/sup 18/O, and negatively with strontium. Strontium substitutes mainly for calcium, thus the negative correlation with mole % MgCO/sub 3/. Dolomites are enriched between 3 to 7% in delta/sup 18/O as compared with coprecipitated calcite, and thus the positive correlation. These two covariations indicate the need to consider the stoichiometric coefficient of dolomites, and to normalize strontium concentrations and delta/sup 18/O with their respective stoichiometric coefficients before inferring their relationship with fluid composition.

Swart, P.K.; Dawans, J.M.

1984-04-01T23:59:59.000Z

210

Nonassociated gas resources in low-permeability sandstone reservoirs, lower tertiary Wasatch Formation, and upper Cretaceous Mesaverde Group, Uinta Basin, Utah  

SciTech Connect

The US Geological Survey recognizes six major plays for nonassociated gas in Tertiary and Upper Cretaceous low-permeability strata of the Uinta Basin, Utah. For purposes of this study, plays without gas/water contacts are separated from those with such contacts. Continuous-saturation accumulations are essentially single fields, so large in areal extent and so heterogeneous that their development cannot be properly modeled as field growth. Fields developed in gas-saturated plays are not restricted to structural or stratigraphic traps and they are developed in any structural position where permeability conduits occur such as that provided by natural open fractures. Other fields in the basin have gas/water contacts and the rocks are water-bearing away from structural culmination`s. The plays can be assigned to two groups. Group 1 plays are those in which gas/water contacts are rare to absent and the strata are gas saturated. Group 2 plays contain reservoirs in which both gas-saturated strata and rocks with gas/water contacts seem to coexist. Most units in the basin that have received a Federal Energy Regulatory Commission (FERC) designation as tight are in the main producing areas and are within Group 1 plays. Some rocks in Group 2 plays may not meet FERC requirements as tight reservoirs. However, we suggest that in the Uinta Basin that the extent of low-permeability rocks, and therefore resources, extends well beyond the limits of current FERC designated boundaries for tight reservoirs. Potential additions to gas reserves from gas-saturated tight reservoirs in the Tertiary Wasatch Formation and Cretaceous Mesaverde Group in the Uinta Basin, Utah is 10 TCF. If the potential additions to reserves in strata in which both gas-saturated and free water-bearing rocks exist are added to those of Group 1 plays, the volume is 13 TCF.

Fouch, T.D.; Schmoker, J.W.; Boone, L.E.; Wandrey, C.J.; Crovelli, R.A.; Butler, W.C.

1994-08-01T23:59:59.000Z

211

Spectroscopic investigation of the vibrational quasi-continuum arising from internal rotation of a methyl group  

SciTech Connect

The goal of this project is to use spectroscopic techniques to investigate in detail phenomena involving the vibrational quasi-continuum in a simple physical system. Acetaldehyde was chosen for the study because: (i) methyl groups have been suggested to be important promotors of intramolecular vibrational relaxation, (ii) the internal rotation of a methyl group is an easily describle large-amplitude motion, which should retain its simple character even at high levels of excitation, and (iii) the aldehyde carbonyl group offers the possibility of both vibrational and electronic probing. The present investigation of the ground electronic state has three parts: (1) understanding the {open_quotes}isolated{close_quotes} internal-rotation motion below, at, and above the top of the torsional barrier, (2) understanding in detail traditional (bond stretching and bending) vibrational fundamental and overtone states, and (3) understanding interactions involving states with multiquantum excitations of at least one of these two kinds of motion.

Hougen, J.T. [NIST, Gaithersburg, MD (United States)

1993-12-01T23:59:59.000Z

212

Evidence for low-temperature isotopic ordering in methyl-monodeuterated lithium acetate dihydrate  

Science Journals Connector (OSTI)

We measured the heat capacities of methyl-monodeuterated lithium acetate dihydrate single crystals (LiC2H2DO2·2H2O) at 2 K < T < 20 K and Raman spectra at ambient conditions. Significant excess heat capacities were found at T = 14.5 K and 5.5 K. The thermodynamic data is compared to that of fully protonated and fully deuterated LiAc and interpreted in terms of phase transitions between a classical dynamically disordered phase above 14.5 K, a phase stable between 14.5 K and 5.5 K in which there is quantum tunnelling of the methyl groups, and an isotopically ordered phase below 5.5 K.

F. Schröder; B. Winkler; J.D. Bauer; E. Haussühl; B. Rivera Escoto; F. Tristan López; M. Avalos Borja; C. Richter; J. Ferner

2012-01-01T23:59:59.000Z

213

Iron-catalyzed reaction products of ?-tocopherol with methyl 13(S)-hydroperoxy-9(Z),11(E)-octadecadienoate  

Science Journals Connector (OSTI)

?-Tocopherol was reacted with methyl 13(S)-hydroperoxy-9(Z),11(E)-octadecadienoate in the presence of an iron-chelate, Fe(III)-acetylacetonate, at 37°C in benzene. The...E)-octadecenoate, four stereoisomers of me...

Ryo Yamauchi; Norio Yamamoto; Koji Kato

1995-05-01T23:59:59.000Z

214

N-Methyl-N-Allylpyrrolidinium Based Ionic Liquids for Solvent-Free Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

We prepared four new ionic liquids consisting of N-methyl-N-allylpyrrolidinium cation in conjunction with anions including iodide, nitrate, thiocyanate, and dicyanamide, respectively, and measured their physical properties of density, viscosity, and ...

Ning Cai; Jing Zhang; Difei Zhou; Zhihui Yi; Jin Guo; Peng Wang

2009-02-16T23:59:59.000Z

215

Consumption of Tropospheric Levels of Methyl Bromide by C1 Compound-Utilizing Bacteria and Comparison to Saturation Kinetics  

Science Journals Connector (OSTI)

ARTICLE GEOMICROBIOLOGY Consumption of Tropospheric Levels of Methyl...bacteria showed no significant consumption of 12 pptv MeBr; thus, the ability...experiments supplied with pptv MeBr. Consumption of MeBr was measured on duplicate...

Kelly D. Goodwin; Ruth K. Varner; Patrick M. Crill; Ronald S. Oremland

2001-12-01T23:59:59.000Z

216

Infra red spectroscopy, flash pyrolysis, thermally assisted hydrolysis and methylation (THM) in the presence of tetramethylammonium hydroxide  

E-Print Network (OSTI)

Infra red spectroscopy, flash pyrolysis, thermally assisted hydrolysis and methylation (THM to sporopollenin or algaenan. This is in agreement with flash pyrolysis­gas chromatography­mass spectrometry (py

217

Assessment of the acute toxicity of triclosan and methyl triclosan in wastewater based on the bioluminescence inhibition of Vibrio fischeri  

Science Journals Connector (OSTI)

In this work, the contributions of triclosan and its metabolite methyl triclosan to the overall acute toxicity of wastewater...Vibrio fischeri.... The protocol used in this paper involved various steps. First, th...

Marinella Farré; Daniela Asperger; Lina Kantiani…

2008-04-01T23:59:59.000Z

218

Enhanced reductive degradation of methyl orange in a microbial fuel cell through cathode modification with redox mediators  

Science Journals Connector (OSTI)

A model azo dye, methyl orange (MO), was reduced through in situ utilization of the electrons derived from the anaerobic conversion of organics in a microbial fuel cell (MFC). The MO reduction process could be...

Rong-Hua Liu; Guo-Ping Sheng; Min Sun…

2011-01-01T23:59:59.000Z

219

Coupled tunnelling motion of a pair of methyl groups in lithium acetate studied by inelastic neutron scattering  

Science Journals Connector (OSTI)

The tunnelling and torsional motions of methyl groups in lithium acetate dihydrate (CH3COOLi·2H2O) have been studied in detail by incoherent inelastic neutron scattering. The results are interpreted by a model of...

S. Clough; A. Heidemann; A. H. Horsewill…

1984-01-01T23:59:59.000Z

220

Cyclic voltammetric investigation of the formation of intermetallic phases at a LiAl electrode in methyl acetate  

Science Journals Connector (OSTI)

The formation of various Li/Al intermetallic phases at the LiAl electrode in methyl acetate was studied using cyclic voltammetry. The thickness ... the reverse sweep, increased acceptance of deposited lithium, ro...

Y. S. Fung; H. C. Lai

1992-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Abstract 293: High-throughput methylation sequencing of targeted genes in breast cancer specimens using nanofluidic PCR prepared libraries  

Science Journals Connector (OSTI)

...are more than 100 candidate genes reported throughout the literatures as promoter hypermethylated in breast cancers (Pubmeth web resource). More recently, with the application of genome wide array-based methylation profile analysis and next generation...

Jun Wang; Zibo Li; Yepeng Wu; Xinwu Guo; Shengyun Li; Zhi Xiao; Feiyu Chen; Zhongping Deng; Lizhong Dai; Wenjun Yi; Lili Tang

2014-10-01T23:59:59.000Z

222

CORRELATION OF DNA METHYLATION WITH MERCURY CONTAMINATION IN MARINE ORGANISMS: A CASE STUDY OF NOAA MUSSEL WATCH TISSUE SAMPLES  

E-Print Network (OSTI)

American oysters (Crassostrea virginica) obtained from the NOAA Mussel Watch program were screened for DNA methylation, a type of epigenetic response to stressors. Oysters were collected from sites in the Gulf of Mexico having high mercury...

Brinkmeyer, Robin; Taylor, Robert; Germ, Kaylyn E.

2011-08-04T23:59:59.000Z

223

Remediation of Methyl Iodide in Aqueous Solution and Soils Amended with Thiourea  

Science Journals Connector (OSTI)

Remediation of Methyl Iodide in Aqueous Solution and Soils Amended with Thiourea ... Therefore, spraying thiourea on the soil surface to form a “reactive surface barrier” may be an effective and innovative strategy for controlling fumigant emissions to the atmosphere and for improving environmental protection. ... Currently, new and innovative remediation technologies including bioremediation, phytoremediation, and chemical remediation have been proposed for use in cleaning polluted soil and groundwater. ...

Wei Zheng; Sharon K. Papiernik; Mingxin Guo; Scott R. Yates

2004-01-08T23:59:59.000Z

224

DNA methylation patterns in IGF-II promoters and prognosis of ovarian cancer  

Science Journals Connector (OSTI)

...of DNA methylation; 3 targeted regions of P2 (P2A, P2B and P2C), while 2 assays each focused on P3 (P3A and P3B) and P4...promoters, which varied from 20% (P2A) to 47% (P2B) and 52% (P2C) in promoter 2, 49% (P3A) and 13% (P3B) in promoter 3...

Alicia Beeghly; D. Katsaros; S. Fracchioli; H. Chen; A. T. Prescott; A. Wiley; Herbert Yu

2005-05-01T23:59:59.000Z

225

The National Energy Modeling System: An Overview 2000 - International  

Gasoline and Diesel Fuel Update (EIA)

international energy module (IEM) consists of four submodules (Figure 4) that perform the following functions: international energy module (IEM) consists of four submodules (Figure 4) that perform the following functions: world oil market submodule—calculates the average annual world oil price (imported refiner acquisition cost) that is consistent with worldwide petroleum demand and supply availability crude oil supply submodule—provides im- ported crude oil supply curves for five crude oil quality classes petroleum products supply submodule—pro- vides imported refined product supply curves for eleven types of refined products oxygenates supply submodule—provides imported oxygenates supply curves for methyl tertiary butyl ether (MTBE) and methanol. Figure 4. International Energy Module Structure The world oil price that is generated by the world oil market submodule is used by all the modules of NEMS as well as the other submodules of IEM. The import supply curves for crude oils, refined products, and oxygenates are used by the petroleum market module.

226

Refinery Stocks of Crude Oil and Petroleum Products  

Gasoline and Diesel Fuel Update (EIA)

Product: Crude Oil and Petroleum Products Crude Oil Petroleum Products Pentanes Plus Liquefied Petroleum Gases Ethane/Ethylene Propane/Propylene Normal Butane/Butylene Isobutane/Isobutylene Oxygenates/Renewables/Other Hydrocarbons Oxygenates (excl. Fuel Ethanol) Methyl Tertiary Butyl Ether (MTBE) All Other Oxygenates Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Renewable Diesel Fuel Other Renewable Fuels Other Hydrocarbons Unfinished Oils Naphthas and Lighter Kerosene and Light Gas Oils Heavy Gas Oils Residuum Motor Gasoline Blending Components MGBC - Reformulated MGBC - Reformulated - RBOB MGBC - RBOB for Blending with Alcohol* MGBC - RBOB for Blending with Ether* MGBC - Conventional MGBC - Conventional CBOB MGBC - Conventional GTAB MGBC - Conventional Other Aviation Gasoline Blending Components Finished Motor Gasoline Reformulated Reformulated Blended with Fuel Ethanol Reformulated, Other Conventional Gasoline Conventional Gasoline Blended with Fuel Ethanol Conventional Gasoline Blended with Fuel Ethanol, Ed55 and Lower Conventional Other Gasoline Finished Aviation Gasoline Kerosene-Type Jet Fuel Kerosene Distillate Fuel Oil Distillate Fuel Oil, 15 ppm and Under Distillate Fuel Oil, Greater than 15 ppm to 500 ppm Distillate Fuel Oil, Greater than 500 ppm Residual Fuel Oil Less than 0.31 Percent Sulfur 0.31 to 1.00 Percent Sulfur Greater than 1.00 Percent Sulfur Petrochemical Feedstocks Naphtha for Petrochemical Feedstock Use Other Oils for Petrochemical Feedstock Use Special Naphthas Lubricants Waxes Petroleum Coke Marketable Coke Asphalt and Road Oil Miscellaneous Products Period-Units: Monthly-Thousand Barrels Annual-Thousand Barrels

227

U.S. Blender Net Input  

U.S. Energy Information Administration (EIA) Indexed Site

2007 2008 2009 2010 2011 2012 View 2007 2008 2009 2010 2011 2012 View History Total Input 1,184,435 1,522,193 1,850,204 2,166,784 2,331,109 2,399,318 2005-2012 Natural Gas Plant Liquids and Liquefied Refinery Gases 3,445 5,686 6,538 7,810 10,663 2008-2012 Pentanes Plus 2,012 474 1,808 1,989 2,326 4,164 2005-2012 Liquid Petroleum Gases 2,971 3,878 4,549 5,484 6,499 2008-2012 Normal Butane 2,943 2,971 3,878 4,549 5,484 6,499 2005-2012 Isobutane 2005-2006 Other Liquids 1,518,748 1,844,518 2,160,246 2,323,299 2,388,655 2008-2012 Oxygenates/Renewables 234,047 274,974 286,837 295,004 2009-2012 Methyl Tertiary Butyl Ether (MTBE) 2005-2006 Renewable Fuels (incl. Fuel Ethanol) 234,047 274,974 286,837 295,004 2009-2012 Fuel Ethanol 131,810 182,772 232,677 273,107 281,507 287,433 2005-2012

228

U.S. Blender Net Input  

U.S. Energy Information Administration (EIA) Indexed Site

Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 View Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 View History Total Input 206,541 217,867 212,114 216,075 219,783 208,203 2005-2013 Natural Gas Plant Liquids and Liquefied Refinery Gases 891 352 376 196 383 1,397 2008-2013 Pentanes Plus 261 301 313 67 287 393 2005-2013 Liquid Petroleum Gases 630 51 63 129 96 1,004 2008-2013 Normal Butane 630 51 63 129 96 1,004 2005-2013 Isobutane 2005-2006 Other Liquids 205,650 217,515 211,738 215,879 219,400 206,806 2008-2013 Oxygenates/Renewables 25,156 26,576 26,253 26,905 27,788 25,795 2009-2013 Methyl Tertiary Butyl Ether (MTBE) 2005-2006 Renewable Fuels (incl. Fuel Ethanol) 25,156 26,576 26,253 26,905 27,788 25,795 2009-2013 Fuel Ethanol 24,163 25,526 24,804 25,491 25,970 24,116 2005-2013

229

The conversion of natural gas to liquid fuels using the Sasol Slurry Phase Distillate Process  

SciTech Connect

The natural gas and energy industries have long sought an economically attractive means of converting remote gas reserves into transportable products, such as fuels or petrochemicals. Applicable gas sources include: undeveloped gas fields in locations so remote that pipeline construction is prohibitively expensive and associated gas from oil wells that is either flared, which is becoming environmentally unacceptable in many parts of the world, or reinjected, which is costly. Projects which have been developed to exploit such feeds typically have converted the gas into one of the following: (1) liquefied natural gas (LNG)--the process plants for LNG production are expensive, need to be very large to be economically viable, have costly dedicated shipping requirements, and suffer from a limited market concentrated in few countries; (2) methanol--the market for petrochemical feedstock methanol is limited, for use as a fuel, further downstream processing is needed, for example in a methyl tertiary butyl ether (MTBE) or methanol to gasoline (MTG) unit. Clearly, there is a need for an alternative that produces high quality fuels or value added products that can be transported to far-off markets, while yielding an attractive return on the developers` investment. The Sasol Slurry Phase Distillate Process will fulfill this need.

Silverman, R.W. [Raytheon Engineers and Constructors, Cambridge, MA (United States); Hill, C.R. [Sastech, Johannesburg (South Africa)

1997-12-31T23:59:59.000Z

230

Total Crude Oil and Petroleum Products Exports  

U.S. Energy Information Administration (EIA) Indexed Site

Exports Exports Product: Total Crude Oil and Petroleum Products Crude Oil Natural Gas Plant Liquids and Liquefied Refinery Gases Pentanes Plus Liquefied Petroleum Gases Ethane/Ethylene Propane/Propylene Normal Butane/Butylene Isobutane/Isobutylene Other Liquids Hydrogen/Oxygenates/Renewables/Other Hydrocarbons Oxygenates (excl. Fuel Ethanol) Methyl Tertiary Butyl Ether (MTBE) Other Oxygenates Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Biomass-Based Diesel Motor Gasoline Blend. Comp. (MGBC) MGBC - Reformulated MGBC - Conventional Aviation Gasoline Blend. Comp. Finished Petroleum Products Finished Motor Gasoline Reformulated Gasoline Conventional Gasoline Finished Aviation Gasoline Kerosene-Type Jet Fuel Kerosene Distillate Fuel Oil Distillate F.O., 15 ppm and under Distillate F.O., Greater than 15 to 500 ppm Distillate F.O., Greater than 500 ppm Residual Fuel Oil Naphtha for Petro. Feed. Use Other Oils Petro. Feed. Use Special Naphthas Lubricants Waxes Petroleum Coke Asphalt and Road Oil Miscellaneous Products Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

231

An assessment of methyl mercury and volatile mercury in land-applied sewage sludge  

SciTech Connect

In 1993, the US Environmental Protection Agency issued regulations covering the land-application of municipal sewage sludge. These regulations established maximum pollutant concentrations and were based upon a risk assessment of human exposure. Mercury, assumed to be inorganic and non-volatile, was one pollutant evaluated. From April, 1995 through February, 1996, the authors studied the species of mercury contaminating municipal sludge applied to land, and the potential for volatilization of mercury from land-applied sludge. Methyl mercury was found at 0.1% of total mercury concentrations and was emitted from land-applied sludge to the atmosphere. Elemental mercury (Hg) was formed in land-applied sludge via the reduction of oxidized mercury and was also emitted to the atmosphere. Hg emission from land-applied sludge was significantly elevated over background soil emission. Methyl mercury is more toxic and more highly bioaccumulated than inorganic mercury, and warrants assessment considering these special criteria. Additionally, mercury emission from sludge-amended soil may lead to the contamination of other environmental media with significant concentrations of the metal. Although these pathways were not evaluated in the regulatory risk assessment, they are an important consideration for evaluating the risks from mercury in land-applied sludge. This presentation will summarize the results of a re-assessment of US EPA regulations regarding the land-application of municipal sewage sludge using data on methyl mercury toxicity and mercury transport in the atmosphere.

Carpi, A. [Cornell Univ., Ithaca, NY (United States); Lindberg, S.E. [Oak Ridge National Lab., TN (United States)

1995-12-31T23:59:59.000Z

232

Electrochemical properties of lithium hexafluoroarsenate in methyl acetate at various temperatures  

Science Journals Connector (OSTI)

Abstract Electrical conductivities of LiAsF6 in methyl acetate were measured in concentration range of 0.4269–2.2672 mol·kg? 1 at 253.15, 263.15, 273.15, 283.15, 293.15, 303.15, 313.15, and 323.15 K. Data were treated by using the semi-empirical Casteel–Amis equation at high concentrations. The dependence of conductivities on the temperature was described by the Arrhenius relationship. It was shown that activation energies for conductivity linearly increased with the mole fraction of LiAsF6. The variation tendency of the energies of activation for the conductivities of LiAsF6 in the order of aprotic solvents (propylene carbonate, ?-butyrolactone, methyl acetate, tetrahydrofuran) has been discussed on the basis of the hypothesis that various conduction mechanisms occur at high concentration in the solvents of low permittivity. The anodic and cathodic stabilities of the LiAsF6 in methyl acetate were measured on a Pt electrode, a wide enough electrochemical stability window being observed.

Elena Yu. Tyunina; Marina D. Chekunova

2013-01-01T23:59:59.000Z

233

Arsenic methylation capability and hypertension risk in subjects living in arseniasis-hyperendemic areas in southwestern Taiwan  

SciTech Connect

Background: Cumulative arsenic exposure (CAE) from drinking water has been shown to be associated with hypertension in a dose-response pattern. This study further explored the association between arsenic methylation capability and hypertension risk among residents of arseniasis-hyperendemic areas in Taiwan considering the effect of CAE and other potential confounders. Method: There were 871 subjects (488 women and 383 men) and among them 372 were diagnosed as having hypertension based on a positive history or measured systolic blood pressure {>=} 140 mm Hg and/or diastolic blood pressure {>=} 90 mm Hg. Urinary arsenic species were determined by high-performance liquid chromatography-hydride generator and atomic absorption spectrometry. Primary arsenic methylation index [PMI, defined as monomethylarsonic acid (MMA{sup V}) divided by (As{sup III} + As{sup V})] and secondary arsenic methylation index (SMI, defined as dimethylarsinic acid divided by MMA{sup V}) were used as indicators for arsenic methylation capability. Results: The level of urinary arsenic was still significantly correlated with cumulative arsenic exposure (CAE) calculated from a questionnaire interview (p = 0.02) even after the residents stopped drinking the artesian well water for 2-3 decades. Hypertensive subjects had higher percentages of MMA{sup V} and lower SMI than subjects without hypertension. However, subjects having CAE > 0 mg/L-year had higher hypertension risk than those who had CAE = 0 mg/L-year disregard a high or low methylation index. Conclusion: Inefficient arsenic methylation ability may be related with hypertension risk.

Huang, Y.-K. [Graduate Institute of Medical Sciences, School of Medicine, Taipei Medical University, Taipei, Taiwan (China); Tseng, C.-H. [National Taiwan University College of Medicine, Taipei, Taiwan (China); Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan (China); Department of Medical Research and Development, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin, Taiwan (China); Huang, Y.-L. [Department of Public Health, School of Medicine, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei 110, Taiwan (China); Yang, M.-H. [Department of Nuclear Science, National Tsing-Hua University, Hsinchu, Taiwan (China); Chen, C.-J. [Genomic Research Center, Academia Sinica, Taipei, Taiwan (China); Graduate Institute of Epidemiology, College of Public Health, National Taiwan University Taipei, Taiwan (China); Hsueh, Y.-M. [Department of Public Health, School of Medicine, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei 110, Taiwan (China)]. E-mail: ymhsueh@tmu.edu.tw

2007-01-15T23:59:59.000Z

234

Factors controlling reservoir quality in tertiary sandstones and their significance to geopressured geothermal production. Annual report, May 1, 1979-May 31, 1980  

SciTech Connect

Differing extents of diagenetic modification is the factor primarily responsible for contrasting regional reservoir quality of Tertiary sandstones from the Upper and Lower Texas Gulf Coast. Detailed comparison of Frio sandstones from the Chocolate Bayou/Danbury Dome area, Brazoria County, and Vicksburg sandstones from the McAllen Ranch Field area, Hidalgo County, reveals that extent of diagenetic modification is most strongly influenced by (1) detrital mineralogy and (2) regional geothermal gradients. Vicksburg sandstones from the McAllen Ranch Field area are less stable, chemically and mechanically, than Frio sandstones from the Chocolate Bayou/Danbury dome area. Vicksburg sandstones are mineralogically immature and contain greater proportions of feldspars and rock fragments than do Frio sandstones. Thr reactive detrital assemblage of Vicksubrg sandstones is highly susceptible to diagenetic modification. Susceptibility is enhanced by higher than normal geothermal gradients in the McAllen Ranch Field area. Thus, consolidation of Vicksburg sandstones began at shallower depth of burial and precipitation of authigenic phases (especially calcite) was more pervasive than in Frio sandstones. Moreover, the late-stage episode of ferroan calcite precipitation that occluded most secondary porosity in Vicksburg sandstones did not occur significantly in Frio sandstones. Therefore, regional reservoir quality of Frio sandstones from Brazoria County is far better than that characterizing Vicksburg sandstones from Hidalgo County, especially at depths suitable for geopressured geothermal energy production.

Loucks, R.G.; Richmann, D.L.; Milliken, K.L.

1980-07-01T23:59:59.000Z

235

Use of ethers as high-octane components of gasolines  

SciTech Connect

This article reports on a study of the possible utilization of methyl tert-amyl ether (MTAE) as an automotive gasoline component, both by itself and in combination with methyl tert-butyl ether (MTBE). The naphtha used in these studies consisted of 80% reformer naphtha produced under severe conditions and 20% straight-run IBP-62/sup 0/C cut. The physicochemical properties of the MTAE, the MTBE, and the naphtha base stock are given. It is determined that MTAE, which has a slightly poorer knock resistance than MTBE, is fully equal to MTBE in all other respects and can be used as an automotive gasoline component; that a gasoline blend prepared from 89% naphtha base stock, 5.5% MTAE, and 5.5% MTBE meets all of the requirements of the standard GOST 2084-77 for Grade AI-93 gasoline; and that the use of MTAE offers a means for expanding the resources of high-octane components, lowering the toxicity of the gasolines and the exhaust gas (in comparison with organometallic antiknock agents), and bringing non-petroleum raw materials into the fuel production picture.

Gureev, A.A.; Baranova, G.N.; Korotkov, I.V.; Levinson, G.I.

1984-01-01T23:59:59.000Z

236

Detection and Quantification of Methyl tert-Butyl Ether-Degrading Strain PM1 by Real-Time TaqMan PCR  

Science Journals Connector (OSTI)

...purification Fresh Water microbiology Geologic...Polymerase metabolism Water Pollution, Chemical...bioremediation detection ethers ground water hydrocarbons methyl tert-butyl...pollutants pollution remediation sampling water resources...

Krassimira R. Hristova; Christian M. Lutenegger; Kate M. Scow

2001-11-01T23:59:59.000Z

237

Condensation Reaction of Methyl N-Phenylcarbamate with Formaldehyde over H? Catalyst  

Science Journals Connector (OSTI)

During the condensation of N-methyl carbamate (MPC) with formaldehyde, liquid acid catalysts, such as H2SO4(12, 13) HCl,(14) and ZnCl2(15) have shown the best catalytic performance with water as a reaction medium. ... Using the organic solvents entails several challenges, such as the recovery and separation of solvents, and consequently increases the production cost. ... Finally, the temperature was increased under He atmosphere [50 cm3 (STP) min–1] at 10 °C min–1 and TPD profiles were recorded at temperatures up to 500 °C. ...

Fang Li; Rui Min; Jing Li; Liya Gao; Wei Xue; Yanji Wang; Xinqiang Zhao

2014-03-07T23:59:59.000Z

238

Chapter 22 - Whole Algal Biomass In situ Transesterification to Fatty Acid Methyl Esters as Biofuel Feedstocks  

Science Journals Connector (OSTI)

Abstract This chapter addresses the yield of lipids quantified as fatty acid methyl esters (FAME) by using different catalysts and catalyst combinations, and the acid catalyst hydrochloric acid providing a consistently high level of conversion to FAME. The discussion is accompanied by a link to the large-scale application of this process as a whole biomass conversion pathway. Microalgae-focused lipid technologies for biofuel applications, renewable and biodiesel fuel properties are described along with in situ transesterification of oleaginous algal biomass, choice of catalyst for in situ whole biomass transesterification, and the analytical characterization of lipid content in algal biomass using in situ transesterification.

Lieve M.L. Laurens

2015-01-01T23:59:59.000Z

239

Isobaric vapor-liquid equilibria in the system methyl propanoate + n-butyl alcohol  

SciTech Connect

Isobaric vapor-liquid equilibria were determined at 74.66, 101.32, and 127.99 kPa for binary mixtures containing methyl propanoate + n-butyl alcohol by using a dynamic still with vapor and liquid circulation. No azeotrope was detected. The data were found to be thermodynamically consistent according to the point to point test. Application of the group-contribution models ASOG, UNIFAC, and modified UNIFAC to the activity coefficients at the three pressures studied gives average errors of less than 10%, 11%, and 3%, respectively.

Susial, P.; Ortega, J. (Univ. de Las Palmas de Gran Canaria, Canary Islands (Spain). Lab. de Termodinamica y Fisicoquimica)

1993-10-01T23:59:59.000Z

240

In-cylinder pressure characteristics of a CI engine using blends of diesel fuel and methyl esters of beef tallow  

SciTech Connect

A Cummins N14-410 diesel engine was operated on 12 fuels produced by blending methyl tallowate, methyl soyate, and ethanol with no. 2 diesel fuel. Engine in-cylinder pressure data were used to evaluate engine performance. Peak cylinder pressures for each fuel blend at all engine speeds were lower than peak pressure for diesel fuel with the exception of the 80% diesel, 13% methyl tallowate, and 7% ethanol; and the 80% diesel, 6.5% methyl tallowate, 6.5% methyl soyate and 7% ethanol blends. The indicated mean effective pressure (IMEP) values for all fuel blends were less than for diesel fuel. The differences in IMEP values correlated with differences in power output of the engine. Similarly, maximum rates of pressure rise for most fuel blends were less than for diesel fuel. It was concluded that the fuel blends used in this study would have no detrimental long-term effects on engine performance, wear, and knock. 6 refs., 4 figs., 7 tabs.

Ali, Y.; Hanna, M.A.; Borg, J.E. [Univ. of Nebraska, Lincoln, NE (United States)

1996-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Water Research Institute Annual Technical Report  

E-Print Network (OSTI)

Air Act mandated oxygenated gasoline containing methyl tert-butyl ether (MtBE) in certain areas percent. The State of Maine elected to use reformulated gasoline (RFG) that contained at least 11 percent and by 1995, oxygenated gasoline use was common in the northeast. Soon after the widespread use of gasoline

242

Characterization of the Deltaproteobacteria in Contaminated and Uncontaminated Surface Stream Sediments and Identification of Potential Mercury Methylators  

SciTech Connect

Microbial communities were examined in surface stream sediments at five contaminated sites and one control site near Oak Ridge, TN in order to identify bacteria that could be contributing to mercury methylation. The phylogenetic composition of the sediment bacterial community was examined over three quarterly sampling periods (36 samples) using 16s rRNA pyrosequencing. Only 3064 sequences (0.85 % of the total community) were identified as Deltaproteobacteria by the RDP classifier at the 99% confidence threshold. Constrained ordination techniques indicated significant positive correlations between Desulfobulbus spp., Desulfonema spp. and Desulfobacca spp. and methyl mercury concentrations in the contaminated sites. On the contrary, the distribution of organisms related to Byssovorax was significantly correlated to inorganic carbon, nitrate and uranium concentrations. Overall, the abundance and richness of Deltaproteobacteria sequences were higher in the sediments of the site, while the majority of the members present at the contaminated sites were either known metal reducers/methylators or metal tolerant species.

Mosher, Jennifer J [ORNL; Vishnivetskaya, Tatiana A [ORNL; Elias, Dwayne A [ORNL; Podar, Mircea [ORNL; Brooks, Scott C [ORNL; Brown, Steven D [ORNL; Brandt, Craig C [ORNL; Palumbo, Anthony Vito [ORNL

2012-01-01T23:59:59.000Z

243

Long-Range Ferromagnetic Ordering in Two-Dimensional Coordination Polymers Co[N(CN)2]2(L) [L ) Pyrazine Dioxide (pzdo) and 2-Methyl  

E-Print Network (OSTI)

) Pyrazine Dioxide (pzdo) and 2-Methyl Pyrazine Dioxide (mpdo)] with Dual µ- and µ3-[N(CN)2] Bridges Hao by the addition of ancillary ligands of pyrazine dioxide (pzdo) and 2-methyl pyrazine dioxide (mpdo) into the Co]- , possesses three coordination nitrogen atoms and several possible coordination modes: terminal, bidentate 1

Gao, Song

244

Polarization insensitive in-fiber mode-locker based on carbon nanotube with N-methyl-2-pryrrolidone solvent filled fiber microchamber  

E-Print Network (OSTI)

Polarization insensitive in-fiber mode-locker based on carbon nanotube with N-methyl-2-pryrrolidone://apl.aip.org/authors #12;Polarization insensitive in-fiber mode-locker based on carbon nanotube with N-methyl-2; published online 8 March 2012) We report an in-fiber laser mode locker based on carbon nanotube with n

Turitsyn, Sergei K.

245

Hydrogen Peroxide Acts as a Second Messenger for the Induction of Defense Genes in Tomato Plants in Response to Wounding, Systemin, and Methyl Jasmonate  

Science Journals Connector (OSTI)

...levels of proteinase inhibitor I in their leaves...systemin, OGA, chitosan, and the plant...accumulation of proteinase inhibitor I that was induced...systemin, OGA, and chitosan, as well as methyl...or 125 mug/mL chitosan or exposed to methyl...assayed for proteinase inhibitor I content in leaf...

Martha L. Orozco-Cárdenas; Javier Narváez-Vásquez; Clarence A. Ryan

246

Asymmetric synthesis of both enantiomers of esters and ?-lactones from optically active 1-chlorovinyl p-tolyl sulfoxides and lithium ester enolates with the formation of a tertiary or a quaternary carbon stereogenic center at the ?-position  

Science Journals Connector (OSTI)

Treatment of optically active 1-chlorovinyl p-tolyl sulfoxides having two different substituents at the 2-position, which were synthesized from aldehydes or unsymmetrical ketones and (R)-(?)-chloromethyl p-tolyl sulfoxide in two or three steps, with the lithium enolate of tert-butyl acetate gave optically active adducts in 99% chiral induction from the sulfur stereogenic center. The adducts were converted to optically active esters, carboxylic acids, and ?-lactones, which have a tertiary or a quaternary carbon stereogenic center at the ?-position. A synthesis of optically active spiro-lactones was realized starting from 2-cyclohexenone by this method.

Shimpei Sugiyama; Tsuyoshi Satoh

2005-01-01T23:59:59.000Z

247

Wear of poly (methyl methacrylate) against a metallic surface in dry Jean Geringer, Bernard Forest, Pierre Combrade  

E-Print Network (OSTI)

@emse.fr b Centre technique Framatome-ANP 1, rue B. Marcet F-71205 Le Creusot Cedex Abstract Wear of Poly1 Wear of poly (methyl methacrylate) against a metallic surface in dry conditions Jean Geringer, femoral stem-bone cement in the field of hip prosthesis. First of all, no significant wear was observed

Paris-Sud XI, Université de

248

The Acquisition of hMLH1 Methylation in Plasma DNA after Chemotherapy Predicts Poor Survival for Ovarian Cancer Patients  

Science Journals Connector (OSTI)

...died, giving the methylation study 74% power to detect a hazard ratio of 2 for the effect...subgroup analysis and greatly weaken the power of the statistical analysis. However...Sci USA, 95: 6870-5, 1998. 23 De Wind N, Dekker M, van Rossum A, et al Mouse...

Gillian Gifford; Jim Paul; Paul A. Vasey; Stanley B. Kaye; and Robert Brown

2004-07-01T23:59:59.000Z

249

MODELING FRETTING-CORROSION WEAR OF 316L SS AGAINST POLY(METHYL METHACRYLATE) WITH THE POINT DEFECT  

E-Print Network (OSTI)

1 MODELING FRETTING-CORROSION WEAR OF 316L SS AGAINST POLY(METHYL METHACRYLATE) WITH THE POINT; ddm2@psu.edu c Center of Research Excellence in Corrosion Research Institute King Fahd University at investigating experimentally fretting corrosion, that is, corrosion induced by friction of AISI 316L SS against

Boyer, Edmond

250

Regionally Specific and Genome-Wide Analyses Conclusively Demonstrate the Absence of CpG Methylation in Human Mitochondrial DNA  

Science Journals Connector (OSTI)

...genome-wide in vertebrate nuclear DNA, the state of methylation...cytosines at non-CpG sites in the nuclear DNA in these studies ranged...Table 6 Analysis of published datasets of genome-wide sodium bisulfite...Cs in mtDNA At non-CpGs in nuclear DNA Akalin et al. (10) a...

Elizabeth E. Hong; Cindy Y. Okitsu; Andrew D. Smith; Chih-Lin Hsieh

2013-05-13T23:59:59.000Z

251

Abstract 4242: Methylation, SNP and expression analysis of the Vitamin D receptor (VDR) gene in different tumor tissues.  

Science Journals Connector (OSTI)

...receptor (VDR) gene in different tumor tissues. Matthew L. Poulin Ann Meyer Gregory Gonzalez Kevin Bi Liying Yan EpigenDx, Inc...biomarkers for different cancers. Citation Format: Matthew L. Poulin, Ann Meyer, Gregory Gonzalez, Kevin Bi, Liying Yan. Methylation...

Matthew L. Poulin; Ann Meyer; Gregory Gonzalez; Kevin Bi; Liying Yan

2013-08-14T23:59:59.000Z

252

Abstract 1360: DNA methylation analysis in self-sampled material as a triage test in hrHPV positive women  

Science Journals Connector (OSTI)

...in self-sampled material as a triage test in hrHPV positive women Aniek Boers 1 Remko...DNA methylation analysis as a triage test in hrHPV positive women outperformed cytology...in self-sampled material as a triage test in hrHPV positive women. [abstract...

Aniek Boers; Remko P. Bosgraaf; Roland W. van Leeuwen; Ed Schuuring; Leon FAG Massuger; Johan Bulten; Willem J. Melchers; Ate GJ van der Zee; Ruud L. Bekkers; Bea Wisman

2014-10-01T23:59:59.000Z

253

Class I Chitinase and -1,3-Glucanase Are Differentially Regulated by Wounding, Methyl Jasmonate, Ethylene, and  

E-Print Network (OSTI)

, Ethylene, and Gibberellin in Tomato Seeds and Leaves1 Chun-Ta Wu2 and Kent J. Bradford* Department. Wounding and methyl jasmonate (MeJA) induced Chi9 expression, whereas ethylene, abscisic acid, sodium. However, MeJA, wounding, and particularly ethylene induced both genes in leaves, whereas GA induced only

Bradford, Kent

254

Gas-Phase Identity SN2 Reactions of Halide Anions and Methyl Halides with Retention of Configuration  

E-Print Network (OSTI)

Gas-Phase Identity SN2 Reactions of Halide Anions and Methyl Halides with Retention back-side and front-side SN2 reactions are found to involve the same ion-molecule complex (X-,,,H3CX of a front-side SN2 reaction with retention of configuration at saturated carbon. Analysis of our

Schlegel, H. Bernhard

255

3-Methyl-1,2-BN-Cyclopentane: A Promising H2 Storage Material?  

SciTech Connect

We provide detailed characterization of properties for 3-methyl-1,2-BN-cyclopentane 1 that are relevant to H2 storage applications such as viscosity, thermal stability, H2 gas stream purity, and polarity. The viscosity of 1 at room temperature is 25±5 cP, about one fourth the viscosity of olive oil. TGA/MS analysis indicates that liquid carrier 1 is thermally stable at 30 °C but decomposes slowly at 50 °C. RGA data suggest that the H2 desorption from 1 is a clean process, producing relatively pure H2 gas. Compound 1 is a polar zwitterionic type liquid consistent with theoretical predictions and solvatochromic studies. "T.A. acknowledges support from the Fuel Cell Technology Program at U.S. DOE, Office of Energy Efficiency 65 and Renewable Energy. Pacific Northwest National Laboratory is operated by Battelle."

Luo, Wei; Neiner, Doinita; Karkamkar, Abhijeet J.; Parab, Kshitij; Garner, Edward B.; Dixon, David A.; Matson, Dean W.; Autrey, Thomas; Liu, Shih-Yuan

2013-01-21T23:59:59.000Z

256

Energy Saving in Conventional and Unconventional Batch Reactive Distillation: Application to Hydrolysis of Methyl Lactate System  

Science Journals Connector (OSTI)

Abstract In this work, energy consumption in a middle vessel batch reactive distillation (MVBRD) column is considered for the production of lactic acid via hydrolysis of methyl lactate. A dynamic optimization problem incorporating a process model is formulated to minimize the batch time which consequently minimizes the total energy consumption. The problem is subject to constraints on the amount and purity of lactic acid. The optimisation variables are reflux ratio and/or reboil ratio which are treated as piecewise constant. The earlier work of the authors on energy consumption in conventional batch reactive distillation column (CBRD) for the same reaction system is used for comparative analysis with the energy consumption in MVBRD. As an example, for a given separation task, the optimization results show that MVBRD is capable of saving over 23 % energy compared to energy consumption in CBRD column for the same task.

Elmahboub A. Edreder; Mansour Emtir; Iqbal M. Mujtaba

2014-01-01T23:59:59.000Z

257

Raman spectra of bilayer graphene covered with Poly(methyl methacrylate) thin film  

SciTech Connect

The Raman spectra of bilayer graphene covered with poly(methyl methacrylate) (PMMA) were investigated. Both the G and 2D peaks of PMMA-coated graphene were stiff and broad compared with those of uncovered graphene. This could be attributed to the residual strain induced by high-temperature baking during fabrication of the nanodevice. Furthermore, the two 2D peaks stiffened and broadened with increasing laser power, which is just the reverse to uncovered graphene. The stiffness is likely caused by graphene compression induced by the circular bubble of the thin PMMA film generated by laser irradiation. Our findings may contribute to the application of PMMA in the strain engineering of graphene nanodevices.

Xia Minggang [MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi'an Jiaotong University, 710049 (China); Center on Experimental Physics, School of Science, Xi'an Jiaotong University, 710049 (China); Su Zhidan; Zhang Shengli [MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi'an Jiaotong University, 710049 (China); Department of Applied Physics, School of Science, Xi'an Jiaotong University, 710049 (China)

2012-09-15T23:59:59.000Z

258

Heterogeneous catalyst for the production of acetic anhydride from methyl acetate  

DOE Patents (OSTI)

This invention relates to a process for producing acetic anhydride by the reaction of methyl acetate, carbon monoxide, and hydrogen at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that contains an insoluble polymer having pendant quaternized phosphine groups, some of which phosphine groups are ionically bonded to anionic Group VIII metal complexes, the remainder of the phosphine groups being bonded to iodide. In contrast to prior art processes, no accelerator (promoter) is necessary to achieve the catalytic reaction and the products are easily separated from the catalyst by filtration. The catalyst can be recycled for consecutive runs without loss in activity. Bifunctional catalysts for use in carbonylating dimethyl ether are also provided.

Ramprasad, D.; Waller, F.J.

1999-04-06T23:59:59.000Z

259

Heterogeneous catalyst for the production of acetic anhydride from methyl acetate  

DOE Patents (OSTI)

This invention relates to a process for producing acetic anhydride by the reaction of methyl acetate, carbon monoxide, and hydrogen at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that contains an insoluble polymer having pendant quaternized phosphine groups, some of which phosphine groups are ionically bonded to anionic Group VIII metal complexes, the remainder of the phosphine groups being bonded to iodide. In contrast to prior art processes, no accelerator (promoter) is necessary to achieve the catalytic reaction and the products are easily separated from the catalyst by filtration. The catalyst can be recycled for consecutive runs without loss in activity. Bifunctional catalysts for use in carbonylating dimethyl ether are also provided.

Ramprasad, Dorai (Allentown, PA); Waller, Francis Joseph (Allentown, PA)

1999-01-01T23:59:59.000Z

260

Isomerization of methyl linoleate on ruthenium(III) alkoxide complex; Mathematical modeling  

SciTech Connect

The isomerization of methyl linoleate using ruthenium alkoxide complexes is described. With alcohols, such as isopropyl alcohol (IPA), 1-butanol, 1-hexanol, and 1-octanol, isomerization of double bonds to produce a conjugated system is the main reaction, with hydrogenation being the side reaction. The latter is formed via the conjugated product. Based on kinetic and infrared spectroscopic data, it is concluded that the active catalytic species is a ruthenium hydride complex formed by the decomposition of the unstable alkoxide. The reaction is mathematically modeled, and the rate parameters are obtained by fitting the simulation to experimental data. These values are compared with data obtained from reactions carried out with supported ruthenium-nickel heterogeneous catalyst.

Mukesh, D.; Narasimhan, C.S.; Ramnarayan, K.; Deshpande, V.M

1989-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Performance analysis and exhaust emissions of neem methyl ester operated compression ignition engine  

Science Journals Connector (OSTI)

Neem oil methyl ester (NOME) was prepared from neem oil using alkaline catalyzed transesterification. The important fuel properties of NOME 20% blend of NOME with diesel were compared with those of diesel. Optimum injection pressures were determined for neat diesel and NOME-20 blend. Comparison of brake specific fuel consumption (BSFC) brake thermal efficiency (BTE) exhaust gas temperature (EGT) and smoke density was done for diesel and NOME-20 blend at their respective optimum injection pressure. Higher BSFC a slight decrease in BTE and a sharp decrease in EGT and smoke density were recorded with NOME-20 blend. Emissions with NOME-20 blend were also compared with diesel emissions at their respective optimum injection pressures. Significant reductions in carbon monoxide hydrocarbon and oxides of nitrogen and increase in carbon-di-oxide were observed with NOME-20 blend. Hence neem biodiesel has an environmental importance over diesel and shows a promising future.

Vinod Singh Yadav; Kamal Kishore Khatri; Deepak Tanwar; Ajayta; Dilip Sharma; S. L. Soni

2013-01-01T23:59:59.000Z

262

Testing Waste Olive Oil Methyl Ester as a Fuel in a Diesel Engine  

Science Journals Connector (OSTI)

In this sense, to gain knowledge about the implications of its use, waste olive oil methyl ester was evaluated as a fuel for diesel engines during a 50-h short-term performance test in a diesel direct-injection Perkins engine. ... At the beginning of the last century, Rudolph Diesel fueled a diesel engine with the oil of an African groundnut (peanut), thus demonstrating the idea of using vegetable oil as a substitute for No. 2 diesel fuel. ... In this way, we obtained a volume value for each trio of working values, making a brake-specific fuel consumption comparison between different tests or fuels possible, as shown in Table 2, where Vi is the volume value for each test and V50 corresponds to that of No. 2 diesel fuel after 50 h (the test that showed the minimum value). ...

M. P. Dorado; E. Ballesteros; J. M. Arnal; J. Gómez; F. J. López Giménez

2003-10-02T23:59:59.000Z

263

Performance and emissions of a diesel tractor engine fueled with marine diesel and soybean methyl ester  

Science Journals Connector (OSTI)

Biodiesel is an alternative fuel that is cleaner than petrodiesel. Biodiesel can be used directly as fuel for a diesel engine without having to modify the engine system. It has the major advantages of having high biodegradability, excellent lubricity and no sulfur content. This paper presents the results of investigations carried out in studying the fuel properties of soybean methyl ester (SME) and its blend with marine diesel fuel from 5%, 20% and 50% blends by volume and in running a diesel engine with these fuels. The results indicate that the use of biodiesel produces lower smoke opacity (up to 74%), but higher brake specific fuel consumption (BSFC) (up to 12%) compared to marine fuel (MF). The measured carbon monoxide (CO) emissions of B5 and B100 fuels were found to be 3% and 52% lower than that of the MF, respectively.

B. Gokalp; E. Buyukkaya; H.S. Soyhan

2011-01-01T23:59:59.000Z

264

Embedded Piezoresistive Microcantilever Sensors Functionalized for the Detection of Methyl Salicylate  

SciTech Connect

Sensors designed to detect the presence of methyl salicylate (MeS) have been tested. These sensors use a sensor platform based on the embedded piezoresistive microcantilever (EPM) design. Sensing materials tested in this study included the polymer poly (ethylene vinyl acetate), or PEVA as well as a composite sensing material consisting of the enzyme SA-binding protein 2, or SABP-2. The SABP-2 was immobilized within a biocompatible Hypol gel matrix. The PEVA-based sensors exhibited slower but reversible responses to MeS vapors, recovering fully to their initial state after the analyte was removed. SABP-2 sensors exhibited faster overall response to the introduction of MeS, responding nearly instantly. These sensors, however, do not recover after exposures have ended. Sensors using the SABP-2 sensing materials act instead as integrating sensors, measuring irreversibly the total MeS dose obtained.

Porter, T. L. [UNLV; Venedam, R. J. [NSTec

2013-03-01T23:59:59.000Z

265

Methyl Chloride from Direct Methane Partial Oxidation: A High-Temperature Shilov-Like Catalytic System  

SciTech Connect

The intention of this study is to demonstrate and evaluate the scientific and economic feasibility of using special solvents to improve the thermal stability of Pt-catalyst in the Shilov system, such that a high reaction temperature could be achieved. The higher conversion rate (near 100%) of methyl chloride from partial oxidation of methane under the high temperature ({approx} 200 C) without significant Pt0 precipitation has been achieved. High concentration of the Cl- ion has been identified as the key for the stabilization of the Pt-catalysts. H/D exchange measurements indicated that the over oxidation will occur at the elevated temperature, developments of the effective product separation processes will be necessary in order to rationalize the industry-visible CH4 to CH3Cl conversion.

Yongchun Tang; John (Qisheng) Ma

2012-03-23T23:59:59.000Z

266

Poly(vinylidenefluoride)-hexafluoropropylene–methyl N-methylpyrrolidinium-N-acetate trifluoromethanesulfonylimide–lithium trifluoromethanesulfonylimide gel electrolytes  

Science Journals Connector (OSTI)

New polymer-ionic liquid-lithium salt gel electrolytes (PILGEs) were prepared using poly(vinylidenefluoride)-hexafluoropropylene copolymer (PVdF(HFP)), methyl N-methylpyrrolidinium-N-acetate trifluoromethanesulfonimide ([MMEPyr][TFSI]), and lithium trifluoromethanesulfonylimide (LiTFSI) in order to investigate the effects of ionic liquids containing an ester group on the electrochemical properties of polymer gel electrolytes. Free standing ionic gels consisting of PVdF(HFP), [MMEPyr][TFSI], and LiTFSI were prepared in a range of weight ratio of polymer/[MMEPyr][TFSI]/LiTFSI = 1/2/0.1 ? 1. Ionic conductivities for the prepared \\{PILGEs\\} were measured with changing temperature and weight ratio of LiTFSI and the obtained values were found to be reasonable (10?4 S cm?1) over the operating temperatures.

Ki-Sub Kim; Seul Bee Lee; Hyunjoo Lee; Hoon Sik Kim; Youngwoo Lee; Kwangsoo Kwack

2009-01-01T23:59:59.000Z

267

Whole Genome Analysis of Functional Protein Binding Sites and DNA Methylation: Application to p53 and Low Dose Ionizing Radiation.  

NLE Websites -- All DOE Office Websites (Extended Search)

Whole Genome Analysis of Functional Protein Binding Sites and DNA Methylation: Whole Genome Analysis of Functional Protein Binding Sites and DNA Methylation: Application to p53 and Low Dose Ionizing Radiation. Krassimira Botcheva, John J. Dunn and Carl W. Anderson Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA The effects of exposure to low doses of ionizing radiation on humans results largely from changes in gene expression mediated by the activation of sequence-specific DNA binding proteins (transcription factors) as well as changes to other chromosomal proteins and perhaps to DNA. To develop a molecular understanding of the consequences of exposures to low doses of ionizing radiation, it will be necessary to understanding where radiation-activated transcription factors bind in whole genomes and how

268

4-O-Methyl-?-l-idopyranosyluronic acid linked to xylan from kraft pulp: isolation procedure and characterisation by NMR spectroscopy  

Science Journals Connector (OSTI)

The tetrasaccharide 2?-O-(4-O-methyl-?-l-idopyranosyluronic acid)xylotriose was isolated from enzymatically hydrolysed, unbleached, birch kraft pulp by anion-exchange chromatography in two steps. The primary structure of the tetrasaccharide was determined by 1H and 13C NMR spectroscopy, using homonuclear and heteronuclear two-dimensional techniques. NOE data and 3JH.H coupling constants show that the 4-O-methyl-?-l-idopyranosyluronic acid in the tetrasaccharide is predominantly in the 1C4 chair conformation. The pKa value (3.17) for 4-O-methyliduronic acid attached ?-(1 ? 2) to xylose was determined from the pH-dependent chemical shift of H-5. The amount of 4-O-methyliduronic acid (0.1–0.5 mol%) in surface xylan of unbleached birch and pine kraft pulps was determined by extensive xylanase treatment and further analysis by NMR spectroscopy and high-performance anion-exchange chromatography.

Anita Teleman; Matti Siika-aho; Harri Sorsa; Johanna Buchert; Marjukka Perttula; Tiina Hausalo; Maija Tenkanen

1996-01-01T23:59:59.000Z

269

Bioaccumulation of triclocarban, triclosan, and methyl-triclosan in a North Texas wastewater treatment plant receiving stream and effects of triclosan on algal lipid synthesis.  

E-Print Network (OSTI)

??Triclosan (TCS) and triclocarban (TCC), widely used antimicrobial agents found in numerous consumer products, are incompletely removed by wastewater treatment plant (WWTP) processing. Methyl-triclosan (M-TCS)… (more)

Coogan, Melinda Ann

2007-01-01T23:59:59.000Z

270

Hydrolysis of cellulose to produce glucose with solid acid catalysts in 1-butyl-3-methyl-imidazolium chloride ([bmIm][Cl]) with sequential water addition  

Science Journals Connector (OSTI)

Selective glucose production by cellulose hydrolysis with initial or sequential water addition in the presence of solid acid catalysts in 1-butyl-3-methyl-imidazolium chloride ([bmIm][Cl]) under microwave irra...

Kaori Ishida; Shiho Matsuda; Masaru Watanabe…

2014-12-01T23:59:59.000Z

271

Effect of monomer/nanoclay interaction on the kinetics of atom transfer radical homo- and copolymerization of styrene and methyl acrylate  

Science Journals Connector (OSTI)

Atom transfer radical homo- and copolymerization of styrene and methyl acrylate initiated with CCl3...-terminated poly(vinyl acetate) macroinitiator were performed at 90°C in the presence of nanoclay (Cloisite 30...

Mahdi Abdollahi; Mohammad Ali Semsarzadeh

2012-04-01T23:59:59.000Z

272

Study on PCB 101, PCB 153, mercury and methyl mercury content in blue crab Portunus Pelagicus from Khuzestan shore (Persian Gulf)  

Science Journals Connector (OSTI)

Distribution of polychlorinated biphenyl (PCB 101, PCB 153), Mercury (Hg) and methyl mercury (MMHg) in muscle, gill and hepatopancreas of blue swimming crab Portunus segnis from Persian Gulf were investigated. In...

Abdolah Raeisi Sarasiab; Mehdi Hosseini

2014-06-01T23:59:59.000Z

273

Oxidation Kinetics of Pure and Blended Methyl Octanoate/n-Nonane/Methylcyclohexane: Measurements and Modeling of OH*/CH* Chemiluminescence, Ignition Delay Times and Laminar Flame Speeds  

E-Print Network (OSTI)

fuels at 1.5 atm indicated the following ignition delay time order, from shortest to longest: methyl octanoate atm (nominal) the order remained, in general, consistent. Under fuel-lean conditions, ignition...

Rotavera, Brandon Michael

2012-07-16T23:59:59.000Z

274

Hydrogenolysis of methyl formate over copper on silica. I. Study of surface species by in situ infrared spectroscopy  

SciTech Connect

The hydrogenolysis of methyl formate to methanol over silica-supported copper has been studied using in situ infrared spectroscopy coupled with simultaneous determination of rate. Under flow reaction conditions two forms of adsorbed methyl formate exist. One has a carbonyl absorption at 1726 cm/sup -1/ and is bound to the support by the hydrogen bonding with a heat of adsorption of 65 kJ mol/sup -1/. The second absorbs at 1666 cm/sup -1/ and is bound to copper with an approximate heat of adsorption of 140 kJ mol/sup -1/. At 457 K the hydrogenolysis rate is directly proportional to the band intensity of the latter and hence it, or another species in equilibrium with it, is involved in the rate-determining step. Adsorption of CO from CO/H/sub 2/ mixtures gives rise to a single infrared band at 2117 cm/sup -1/, the corresponding heat of adsorption being 60 kJ mol/sup -1/. Competitive measurements under hydrogenolysis conditions show that methyl formate will partially displace adsorbed CO and not vice versa. Nonetheless CO does reversibly inhibit the rate and this is attributed to its adsorption displacing hydrogen from the surface. The lower concentration of surface hydrogen also reduces the rate of hydrogenation of a formaldehyde intermediate leading to its deposition as a polymer as revealed by infrared bands at 1483 and 1375 cm/sup -1/. The same polymer accretes more rapidly during the reverse methanol to methyl formate reaction for which CO is a substantial by-product and hydrogen pressures are much lower than used for hydrogenolysis. Continuous deactivation of the catalyst is then observed.

Monti, D.M.; Cant, N.W.; Trimm, D.L.; Wainwright, M.S.

1986-07-01T23:59:59.000Z

275

Durability of Poly(Methyl Methacrylate) Lenses Used in Concentrating Photovoltaic Modules: Preprint  

SciTech Connect

Concentrating photovoltaic (CPV) technology has recently gained interest based on their expected low levelized cost of electricity, high efficiency, and scalability. Many CPV systems use Fresnel lenses made of poly(methyl methacrylate)(PMMA) to obtain a high optical flux density. The optical and mechanical durability of such components, however, are not well established relative to the desired service life of 30 years. Specific reliability issues may include: reduced optical transmittance, discoloration, hazing, surface erosion, embrittlement, crack growth, physical aging, shape setting (warpage), and soiling. The initial results for contemporary lens- and material-specimens aged cumulatively to 6 months are presented. The study here uses an environmental chamber equipped with a xenon-arc lamp to age specimens at least 8x the nominal field rate. A broad range in the affected characteristics (including optical transmittance, yellowness index, mass loss, and contact angle) has been observed to date, depending on the formulation of PMMA used. The most affected specimens are further examined in terms of their visual appearance, surface roughness (examined via atomic force microscopy), and molecular structure (via Fourier transform infrared spectroscopy).

Miller, D. C.; Gedvilas, L. M.; To, B.; Kennedy, C. E.; Kurtz, S. R.

2010-08-01T23:59:59.000Z

276

Re-refining of waste mineral insulating oil by extraction with N-methyl-2-pyrrolidone  

Science Journals Connector (OSTI)

Extraction with N-methyl-2-pyrrolidone (NMP) via the three-stage mixer–settler operation was studied as possible process for re-refining of waste mineral insulating oil. The following extraction process parameters were investigated systematically in order to determine their optimum values: amount of water as co-solvent in NMP, extraction temperature and solvent/oil ratio. The process parameters and resulting oil chemical compositions were found to influence the electrical properties and the oxidation stability of the re-refined oil. The levels of aromatic, paraffinic and polycyclic aromatic hydrocarbons were determined using IR spectroscopy and HPLC, while other relevant chemical and electrical properties of waste and re-refined oil were determined according to IEC, ISO and ASTM standards. Extraction using NMP was found to be an adequate method for waste mineral insulating oil re-refining, according to the application properties of the re-refined oil. Moderate extraction temperature, 1% water in NMP and a low solvent/oil ratio (0.5) were determined to be the optimum process parameters.

Jelena Luki?; Aleksandar Orlovi?; Michael Spiteller; Jovan Jovanovi?; Dejan Skala

2006-01-01T23:59:59.000Z

277

Effect of reticuloendothelial system blockade on the biotransformation of methyl mercury in the rat  

SciTech Connect

It has been reported that methyl mercury (MeHg) administered to animals is biotransformed to inorganic mercury. Several studies have presented that there are two degradation process, by intestinal microflora and by animal tissues themselves. In a previous paper, the authors reported the biotransformation of MeHg in the rat was enhanced by phenylhydrazine administration, and inhibited by splenectomy or treatment with carrageenan (CAR). They suggested that spleen and liver might be the important sites for formation of inorganic mercury, and that reticuloendothelial system (RES) cells in these organs might play a major role in this biotransformation. The clearance activity of RES cells, mainly located in the liver and spleen, can be depressed by saturating those cells with CAR, colloidal carbon (CC), trypan blue (TB), colloidal iron (CFe), dextran sulfate, silica. The purpose of this study is to confirm the relationship between RES function and biotransformation of MeHg by using four representative blockers, CC, TB, CFe and CAR. The inhibited biotransformation of MeHg in RES-blocker-treated rats was evaluated by measuring the amount of total and inorganic mercury in tissues. On the other hand, RES cell activity was measured by carbon clearance tests.

Suda, Ikuo; Takahashi, Hitoshi (Kumamoto Univ. Medical School (Japan))

1990-04-01T23:59:59.000Z

278

The dependence of the methylation of mercury on the landfill stabilization process and implications for the landfill management  

Science Journals Connector (OSTI)

Abstract Mercury species and other chemical characteristics of the leachate from anaerobic and semi-aerobic landfills were analyzed to investigate the factors that control mercury methylation during the landfill stabilization process. At the early landfill stage, the total mercury (THg) and the monomethyl mercury (MMHg) released rapidly and significantly, the \\{THg\\} concentration of the semi-aerobic landfill leachate was obviously higher than that of the anaerobic landfill leachate, while compared with the semi-aerobic landfill, the \\{MMHg\\} concentration in the anaerobic landfill was higher. As the landfill time increased, both of \\{THg\\} and \\{MMHg\\} concentration decreased quickly, the \\{THg\\} concentration in the anaerobic landfill was much higher than that in semi-aerobic landfill, while the \\{MMHg\\} concentration in the anaerobic landfill was lower than that in the semi-aerobic landfill. Generally, the concentrations of dimethyl mercury (DMHg) in the anaerobic landfill leachate were slightly higher than in the semi-aerobic landfill leachate during the stabilization process. A significant positive correlation was found between the \\{DMHg\\} concentrations and the pH value in anaerobic landfill leachate, but this correlation was opposite in the semi-aerobic landfill. The oxidative–reductive potential (ORP) condition was found to be the controlling factor of the methylation process during the early stage. However, the chemical characteristics, especially the TOC concentration, appeared to be the dominant factor affecting the methylation process as the landfill time increased.

Xiaoli Chai; Yongxia Hao; Zhonggen Li; Wei Zhu; Wentao Zhao

2015-01-01T23:59:59.000Z

279

Methyl-parathion decreases sperm function and fertilization capacity after targeting spermatocytes and maturing spermatozoa  

SciTech Connect

Paternal germline exposure to organophosphorous pesticides (OP) has been associated with reproductive failures and adverse effects in the offspring. Methyl parathion (Me-Pa), a worldwide-used OP, has reproductive adverse effects and is genotoxic to sperm. Oxidative damage has been involved in the genotoxic and reproductive effects of OP. The purpose of this study was to determine the effects of Me-Pa on spermatozoa function and ability to fertilize. Male mice were exposed to Me-Pa (20 mg/kg bw, i.p.) and spermatozoa from epididymis-vas deferens were collected at 7 or 28 days post-treatment (dpt) to assess the effects on maturing spermatozoa and spermatocytes, respectively. DNA damage was evaluated by nick translation (NT-positive cells) and SCSA (percentDFI); lipoperoxidation (LPO) by malondialdehyde production; sperm function by spontaneous- and induced-acrosome reactions (AR); mitochondrial membrane potential (MMP) by using the JC-1 flurochrome; and, fertilization ability by an in vitro assay and in vivo mating. Results showed alterations in DNA integrity (percentDFI and NT-positive cells) at 7 and 28 dpt, in addition to decreased sperm quality and a decrease in induced-AR; reduced MMP and LPO was observed only at 7 dpt. We found negative correlations between LPO and all sperm alterations. Altered sperm functional parameters were associated with reduced fertilization rates at both times, evaluated either in vitro or in vivo. These results show that Me-Pa exposure of maturing spermatozoa and spermatocytes affects many sperm functional parameters that result in a decreased fertilizing capacity. Oxidative stress seems to be a likely mechanism ofthe detrimental effects of Me-Pa in male germ cells.

Pina-Guzman, Belem; Sanchez-Gutierrez, M.; Marchetti, Francesco; Hernandez-Ochoa, I.; Solis-Heredia, M.J .; Quintanilla-Vega, B.

2009-05-03T23:59:59.000Z

280

Microhydration Effects on the Intermediates of the SN2 Reacation of Iodide Anion with Methyl Iodine  

SciTech Connect

Reactions of halide anions with methyl halides (X- + CH3Y ? XCH3 + Y-) are bimolecular nucleophilic substitution (SN2) reactions that have been well investigated in the last few decades.[1] Figure 1 shows typical potential energy surfaces (PESs) proposed for symmetric (X- + CH3X ? XCH3 + X-) SN2 reactions along the reaction coordinate. In the gas phase, the PES has two minima corresponding to the stable X-(CH3X) complexes.[2] The PES is substantially distorted by the solvation. Since the negative charge is delocalized over the [X•••CH3•••X]- moiety at the transition state the stabilization energy gained by the solvation is smaller for the transition state than that for the (X- + CH3X) reactants or the X- (CH3X) complexes. In solution, a large potential barrier exists between the reactants and products. The rate constants of these reactions in protic solvents were reported to be a few orders of magnitude smaller than those in aprotic solvents; this trend was explained by the formation of solvation shells of protic molecules around the halide anions.[1,3] Morokuma has previously reported a theoretical study on the PES of the (Cl- + CH3Cl ? ClCH3 + Cl-) SN2 reaction with a few H2O molecules. The attachment of H2O molecules to the Cl-(CH3Cl) reactive system produces metastable isomers, which affect the reaction mechanism.[4] Johnson and coworkers extensively investigated the structure and reactions of halide anion complexes in the gas phase using photodissociation spectroscopy.

Doi, Keisuke; Togano, Eijiro; Xantheas, Sotiris S.; Nakanishi, Ryuzo; Nagata, Takashi; Ebata, Takayuki; Inokuchi, Yoshiya

2013-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Dehydration of isobutanol to isobutene in a slurry reactor  

SciTech Connect

The April 1990 Alternative Fuels Proposal to the Department of Energy involved the development of new technology, based on the liquid phase process, for conversion of coal-derived synthesis gas to oxygenated hydrocarbon fuels, fuel additives, and fuel intermediates. The objective of this work was to develop a slurry reactor based process for the dehydration of isobutanol to isobutene. The isobutene can serve as a feedstock for the high octane oxygenated fuel additive methyl tertiary-butyl either (MTBE). Alumina catalysts were investigated because of their wide use as a dehydration catalyst. Four commercially available alumina catalysts (Catapal B, Versal B, Versal GH, and Al-3996R) were evaluated for both activity and selectivity to the branched olefin. All four catalysts demonstrated conversions greater than 80% at 290 C, while conversions of near 100% could be obtained at 330 C. The reaction favors low pressures and moderate to low space velocities. A yield of 0.90 mole isobutene per mole reacted isobutanol or better was obtained at conversions of 60--70% and higher. From 75 to 98% conversion, the four catalysts all provide isobutene yields ranging from 0.92 to 0.94 with the maximum occurring around 90% conversion. At low conversions, the concentration of diisobutyl ether becomes significant while the concentration of linear butenes is essentially a linear function of isobutanol conversion. Doping the catalyst with up to 0.8 wt % potassium showed a modest increase in isobutene selectivity; however, this increase was more than offset by a reduction in activity. Investigations using a mixed alcohols feed (consistent with isobutanol synthesis from syngas) demonstrated a small increase in the C4 iso-olefin selectivity over that observed for a pure isobutanol feed. 55 refs.

Latshaw, B.E.

1994-02-01T23:59:59.000Z

282

Change of caged dynamics at Tg in hydrated proteins found after suppressing the methyl-group rotation contribution  

E-Print Network (OSTI)

In conventional glassformers at sufficiently short times and low enough temperatures, molecules are mutually caged by the intermolecular potential. The fluctuation and dissipation from motion of caged molecules when observed by elastic incoherent neutron scattering exhibit a change in temperature dependence of the mean square displacement (MSD) at the glass transition temperature Tg. This is a general and fundamental property of caged dynamics in glassformers, which is observed always near Tg independent of the energy resolution of the spectrometer. Recently we showed the same change of T-dependence at Tg is present in proteins solvated with bioprotectants, coexisting with the dynamic transition at a higher temperature Td. In these solvated proteins, all having Tg and Td higher than the proteins hydrated by water alone, the observation of the change of T-dependence of the MSD at Tg is unobstructed by the methyl-group rotation contribution at lower temperatures. On the other hand, proteins hydrated by water alone have lower Tg and Td, and hence unambiguous evidence of the transition of MSD at Tg is hard to find. Notwithstanding, evidence on the break of the MSD at Tg can be found by deuterating the protein to suppress the methyl-group contribution. An alternative strategy is the use of a spectrometer that senses motions faster than 15 ps, which confers the benefit of shifting both the onset of methyl-group rotation contribution as well as the dynamic transition to higher temperatures, and again the change of MSD at Tg becomes evident. The break of the elastic intensity or the MSD at Tg coexists with the dynamics transition at Td in hydrated and solvated proteins. Recognition of this fact helps to remove inconsistency and conundrum encountered in interpreting the data that thwart progress in understanding the origin of the dynamic transition and its connection to biological function.

K. L. Ngai; S. Capaccioli; A. Paciaroni

2011-06-29T23:59:59.000Z

283

Rheological Properties of Poly(methyl methacrylate)/Nanoclay Composites As Investigated by Creep Recovery in Shear  

Science Journals Connector (OSTI)

Rheological Properties of Poly(methyl methacrylate)/Nanoclay Composites As Investigated by Creep Recovery in Shear ... For different polymer systems filled with nanoclays a strong influence of the filler on rheological properties of the composites in the molten state was reported from experiments performed in oscillatory shear. ... Very interesting is the fact that there is no difference of the mean layer distance for the exemplarily shown PMMA 7N masterbatch with 23.8 vol % nanoclay after solution mixing compared to the composite diluted with pure PMMA 7N after melt mixing. ...

Helmut Muenstedt; Nikolaos Katsikis; Joachim Kaschta

2008-11-21T23:59:59.000Z

284

PEMFC cathode catalyst contamination evaluation with a RRDE-methyl methacrylate  

Science Journals Connector (OSTI)

Abstract This study was undertaken to provide insight into the mechanism of methyl methacrylate (MMA) contamination on the cathodes in proton exchange membrane fuel cells (PEMFCs). The effect of various concentrations of MMA on the oxygen reduction reaction (ORR) was investigated using a rotating ring-disk electrode (RRDE). The adsorption of MMA on the Pt/C electrode leads to a reduction in the electrochemical surface area (ECSA) and a decrease in the mass activity of the ORR. Increasing the MMA concentration causes an increase in its coverage on Pt and a decrease in the ORR mass activity. At high MMA concentration (0.1 M), the O2 transportation is also affected, resulting in a large decrease in the diffusion limiting current. For all of the MMA concentrations measured, a shift in the ORR reaction pathway from a 4-electron to 2-electron mechanism is observed, as indicated by the increase in the H2O2 production on the ring. Using the RRDE measurements and the Levich plots, the total charge transfer number is confirmed to decrease from 4 for the clean electrode to lower values due to the increase in the H2O2 side reactions. The shift in the reaction pathway is hypothesized to be caused by the inhibition of dual adsorption of the O2 molecules, due to steric hindrance induced by MMA adsorption on the Pt/C electrode. Tafel evaluation indicates a continuous increase in the slope with an increase in the MMA concentration, which indicates that the passage of electrons for the ORR at the electrode surface is altered by the adsorption of MMA. A recovery effect was also investigated and a water rinsing process was used to recover the electrode. Only a partial recovery was obtained with a water rinse followed by potential cycling over the same potential range as the initial ECSA measurements. The unrecovered performance is attributed to MMA remnants on the catalyst surface, which can be removed by potential cycling over a wider potential range with a larger anodic potential limit.

Junjie Ge; Jean St-Pierre; Yunfeng Zhai

2014-01-01T23:59:59.000Z

285

Emissions and engine performance from blends of soya and canola methyl esters with ARB {number_sign}2 diesel in a DCC 6V92TA MUI engine  

SciTech Connect

A Detroit Diesel 6V92TA MUI engine was operated on several blends of EPA No. 2 diesel, California ARB No. 2 diesel, soya methyl ester (SME) and canola methyl ester (CME). Various fuels and fuel blend characteristics were determined and engine emissions from these fuels and blends were compared. Increasing percentages of SME and CME blended with either ARB or EPA diesels led to increased emissions of NO{sub x}, CO{sub 2} and soluble particulate matter. Also noted were reductions in total hydrocarbons, CO and insoluble particulate matter. Chassis dynamometer tests conducted on a 20/80 SME/ARB blend showed similar emissions trends. The data suggest that certain methyl ester/No. 2 diesel blends in conjunction with delays in engine timing and technologies that reduce the soluble fraction of particulate emissions merit further exploration as emissions reducing fuel options for North American mass transits (except in California, which mandates ARB diesel).

Spataru, A.; Romig, C.

1995-12-31T23:59:59.000Z

286

Emissions and engine performance from blends of soya and canola methyl esters with ARB No. 2 diesel in a DDC 6V92TA MUI engine  

SciTech Connect

A Detroit Diesel 6V92TA MUI engine was operated on several blends of EPA No. 2 diesel, soya methyl ester (SME) and canola methyl ester (CME). Various fuels and fuel blend characteristics were determined and engine emissions from these fuels and blends were compared. Increasing percentages of SME and CME blended with either ARB or EPA diesels led to increased emissions of NO{sub x}, CO{sub 2} and soluble particulate matter. Also noted were reductions in total hydrocarbons, CO and insoluble particulate matter. Chassis dynamometer tests conducted on a 20/80 SME/ARB blend showed similar emission trends. The data suggest that certain methyl ester/No. 2 diesel blends in conjunction with technologies that reduce the soluble fraction of particulate emissions merit further exploration as emissions reducing fuel options for North American mass transit sectors (except California, which mandates ARB diesel).

Spataru, A.; Romig, C. [ADEPT Group, Inc., Los Angeles, CA (United States)

1995-11-01T23:59:59.000Z

287

General matrix ENDOR line shape model applied to the methyl radical in lithium acetate dihydrate using single crystal data  

Science Journals Connector (OSTI)

A new general matrix ENDOR line shape model is tested against ENDOR data on the methyl radical in ??irradiated lithium acetate dihydrate. All parameters in the line shape model are determined or narrowly limited by experiment. These include the dipolar tensors of all protons within 5 Ĺ of the methyl radical the microwave and radiofrequency magnetic fields and the electronic and nuclear spin–lattice and spin–spin relaxation times. The theoretical simulations agree satisfactorily with the experimental lineshape microwavemagnetic field dependence radiofrequency magnetic field dependence and angular variation of single crystalENDOR line intensities. The effective nuclear spin–lattice relaxation time is ?10 ms at 77 K and seems to be dominated by an angularly independent nuclear relaxation mechanism. The angularly dependent electron–nuclear dipolar interaction is found to be of much less importance for the ENDOR response. It is noted that the angular variation of ENDOR intensities is an important parameter to assess the nuclear relaxation mechanisms that control the ENDOR response. Data on cw and pulsed matrix ENDOR are compared and found to be similar. It is also shown that a model based on idealized line shape theory for disordered systems can satisfactorily reproduce matrix ENDOR line shapes. Both models allow calculation of the relative contributions from angularly independent and dependent ENDOR responses.

Larry Kevan; P. A. Narayana; K. Toriyama; M. Iwasaki

1979-01-01T23:59:59.000Z

288

Hydration properties of natural and synthetic DNA sequences with methylated adenine or cytosine bases in the R.DpnI target and BDNF promoter studied by molecular dynamics simulations  

Science Journals Connector (OSTI)

Adenine and cytosine methylation are two important epigenetic modifications of DNA sequences at the levels of the genome and transcriptome. To characterize the differential roles of methylating adenine or cytosine with respect to their hydration properties we performed conventional MD simulations and free energy perturbation calculations for two particular DNA sequences namely the brain-derived neurotrophic factor (BDNF) promoter and the R.DpnI-bound DNA that are known to undergo methylation of C5-methyl cytosine and N6-methyl adenine respectively. We found that a single methylated cytosine has a clearly favorable hydration free energy over cytosine since the attached methyl group has a slightly polar character. In contrast capping the strongly polar N6 of adenine with a methyl group gives a slightly unfavorable contribution to its free energy of solvation. Performing the same demethylation in the context of a DNA double-strand gave quite similar results for the more solvent-accessible cytosine but much more unfavorable results for the rather buried adenine. Interestingly the same demethylation reactions are far more unfavorable when performed in the context of the opposite (BDNF or R.DpnI target) sequence. This suggests a natural preference for methylation in a specific sequence context. In addition free energy calculations for demethylating adenine or cytosine in the context of B-DNA vs. Z-DNA suggest that the conformational B-Z transition of DNA transition is rather a property of cytosine methylated sequences but is not preferable for the adenine-methylated sequences investigated here.

2014-01-01T23:59:59.000Z

289

High-Throughput Hacking of the Methylation Patterns in Breast Cancer by In vitro Transcription and Thymidine-Specific Cleavage Mass Array on MALDI-TOF Silico-Chip  

Science Journals Connector (OSTI)

...Research Article Cancer Genes and Genomics High-Throughput Hacking of the Methylation Patterns in Breast Cancer by In vitro Transcription...Supplement: Supplementary Data Supplementary Data High-throughput hacking of the methylation patterns in breast cancer by in vitro transcription...

Ramin Radpour; Mahdi Montazer Haghighi; Alex Xiu-Cheng Fan; Peyman Mohammadi Torbati; Sinuhe Hahn; Wolfgang Holzgreve; Xiao Yan Zhong

2008-11-01T23:59:59.000Z

290

Syntrophs Dominate Sequences Associated with the Mercury Methylation-Related Gene hgcA in the Water Conservation Areas of the Florida Everglades  

Science Journals Connector (OSTI)

...great concern because of potential adverse impacts on human and wildlife health through mercury accumulation in aquatic food webs. We developed a new PCR primer set targeting hgcA, a gene encoding a corrinoid protein essential for Hg methylation across...

Hee-Sung Bae; Forrest E. Dierberg; Andrew Ogram

2014-08-08T23:59:59.000Z

291

1-Methyl Naphthalene Reorientation at the Air-Liquid Interface upon Water Saturation Studied by Vibrational Broad Bandwidth Sum Frequency Generation Spectroscopy  

E-Print Network (OSTI)

will encounter gas-phase water molecules or may react with atmospheric oxidants. The uptake and reaction1-Methyl Naphthalene Reorientation at the Air-Liquid Interface upon Water Saturation Studied by Vibrational Broad Bandwidth Sum Frequency Generation Spectroscopy Elizabeth L. Hommel and Heather C. Allen

292

Anharmonicity and isomorphic phase transition: a multi-temperature X-ray single-crystal and powder diffraction study of 1-(2'-aminophenyl)-2-methyl-4-nitroimidazole  

Science Journals Connector (OSTI)

Multi-temperature single-crystal and powder diffraction experiments on 1-(2'-aminophenyl)-2-methyl-4-nitroimidazole show that this crystal undergoes an isomorphic phase transition with the coexistence of two phase domains over a wide temperature range. The anharmonic approach was the only way to model the resulting disorder.

Poulain, A.

2014-02-28T23:59:59.000Z

293

Downregulation of Filamin A Interacting Protein 1-Like is Associated with Promoter Methylation and Induces an Invasive Phenotype in Ovarian Cancer  

Science Journals Connector (OSTI)

...System as described in Materials and Methods. The y-axis...artifacts resulting from the handling of FFPE tissues, by...out as described in Materials and Methods. Methylation...A, the schematic diagram of the putative CpG...out as described in Materials and Methods, and is...

Elizabeth R. Burton; Aneesa Gaffar; Soo Jin Lee; Folashade Adeshuko; Kathleen D. Whitney; Joon-Yong Chung; Stephen M. Hewitt; Gloria S. Huang; Gary L. Goldberg; Steven K. Libutti; and Mijung Kwon

2011-08-01T23:59:59.000Z

294

Bis(4-methyl­anilinium) and bis­(4-iodo­anilinium) penta­molybdates from laboratory X-ray powder data and total energy minimization  

Science Journals Connector (OSTI)

The crystal structures of bis­(4-methyl­anilinium) and bis­(4-iodo­anilinium) penta­molybdates were determined using laboratory X-ray data and refined by total energy minimization methods. The obtained structures present alternating organic cation and inorganic polyanion layers bound by weak bonding (apart from ionic inter­actions).

Oszajca, M.

2013-10-31T23:59:59.000Z

295

Application of basic zeolites in the decomposition reaction of 2-methyl-3-butyn-2-ol and the isomerization of 3-carene  

Science Journals Connector (OSTI)

Basic zeolite catalysts can be generated via ion exchange or via impregnation with alkali metals and alkali metal acetates following different methods. The decomposition of 2-methyl-3-butyn-2-ol and the isomerization reaction of 3-carene to 2-carene have been studied in the gas phase over various basic zeolites to investigate their value as test reactions for basic properties of zeolites.

U Meyer; W.F Hoelderich

1999-01-01T23:59:59.000Z

296

Determination of Total Biodiesel Fatty Acid Methyl, Ethyl Esters, and Hydrocarbon Types in Diesel Fuels by Supercritical Fluid Chromatography-Flame Ionization Detection  

Science Journals Connector (OSTI)

......Research and Engineering, Paulsboro...determining total biodiesel methyl and...in diesel fuels by supercritical...mixture. Introduction The proposed use of biodiesel esters derived...as diesel fuel blending...of Total Biodiesel Fatty Acid...in Diesel Fuels by Supercritical...Research and Engineering, Paulsboro......

John W. Diehl; Frank P. DiSanzo

297

Pelargonium Oil and Methyl Hexaneamine (MHA): Analytical Approaches Supporting the Absence of MHA in Authenticated Pelargonium graveolens Plant Material and Oil  

Science Journals Connector (OSTI)

......research-article Articles Pelargonium Oil and Methyl Hexaneamine (MHA): Analytical...Pelargonium graveolens Plant Material and Oil Mahmoud A. ElSohly 1 2 3 4 * Waseem Gul...Pelargonium graveolens) leaves, stems, roots or oil, and therefore qualifies as a dietary ingredient......

Mahmoud A. ElSohly; Waseem Gul; Kareem M. ElSohly; Timothy P. Murphy; Aroona Weerasooriya; Amar G. Chittiboyina; Bharathi Avula; Ikhlas Khan; Amy Eichner; Larry D Bowers

2012-09-01T23:59:59.000Z

298

Determination of Total Biodiesel Fatty Acid Methyl, Ethyl Esters, and Hydrocarbon Types in Diesel Fuels by Supercritical Fluid Chromatography-Flame Ionization Detection  

Science Journals Connector (OSTI)

......Determination of Total Biodiesel Fatty Acid Methyl...vortex mixer. This process produced solutions ranging...D5186 indicated that the biodiesel esters were not eluted...0%. For further evaluation, the quantitative analysis...determination of the biodiesel ester components by......

John W. Diehl; Frank P. DiSanzo

299

Combustion analysis of a direct injection diesel engine when fuelled with sunflower methyl ester and its diesel blends  

Science Journals Connector (OSTI)

Uncertainty in the availability of petroleum-based fuels in the near future and stringent pollution norms have triggered a search for renewable and clean-burning fuels. The use of vegetable oil as an alternative fuel has for long been in the pipeline, but its direct use has been limited because of its higher viscosity. In this work, sunflower oil was taken as feedstock and the feasibility of sunflower oil methyl ester (SFME) as an alternative fuel for diesel engines was investigated. Tests were conducted in a 4.4 kW, single cylinder, naturally aspirated direct injection diesel engine. It was observed that the premixed combustion phase of SFME and its blends were less intense compared with diesel oil. In addition, it was observed that SFME and its blends had slightly lower thermal efficiency and lower tailpipe emissions than diesel oil.

G. Lakshmi Narayana Rao; S. Saravanan; P. Selva Ilavarasi; G. Devasagayam

2009-01-01T23:59:59.000Z

300

The comparative analysis of diesel engine combustion and emission parameters fuelled with palm oil methyl esters and its diesel blends  

Science Journals Connector (OSTI)

In this work, the combustion and emission characteristics of a direct injection compression ignition engine fuelled with diesel-Palm Oil Methyl Ester (POME) blends are investigated. This study shows that the ignition delay decreases with increase in the POME addition. The maximum rate of pressure rise and maximum rate of heat release decreases with increase in POME addition at all loads. As the percentage of POME in the blend increases, the crank angle at which the maximum rate of heat release takes place advances. The brake thermal efficiency decreases with increase in POME addition. The unburned hydrocarbon, carbon monoxide and soot intensity decreases, while nitrogen oxides (NOx) increase with increase in POME addition. [Received: April 4, 2008; Accepted: November 24, 2008

G. Lakshmi Narayana Rao; S. Saravanan; P. Selva Ilavarasi

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Remediation of water contamination using catalytic technologies  

Science Journals Connector (OSTI)

Remediation of contaminated ground and underground water is becoming a critical issue in Europe and worldwide. We discuss here the role of catalysis in water remediation, with reference to two specific examples of catalytic water remediation technologies: (i) the elimination of nitrate and pesticides from water contaminated as a result of agricultural practices and (ii) the conversion of methyl tert-butyl ether (MTBE) in contaminated underground water. Of particular interest is a technology based on catalytic membranes for remediation of water contaminated by nitrate, which offers various advantages with respect to conventional technologies. Using a Pd-Cu-based catalytic membrane, a reaction temperature below 15 °C, a mixed 4:1 CO2:H2 feed and controlling bulk solution pH by \\{HCl\\} addition, it is possible to obtain a nitrate conversion higher than 80% even with ammonium ion formation below 0.5 ppm, i.e. the maximum concentration allowed to meet the requirements for drinking water quality. In MTBE conversion in contaminated underground water, acid zeolites with suitable pore structures (channel structure and pore openings) such as H-ZSM-5 and H-BEA can be used as catalytic permeable reactive barriers for in situ remediation. These zeolites not only act as adsorbents for both MTBE and its reaction products, but also effectively catalyze the hydrolysis of MTBE to t-butyl alcohol (TBA) and methanol (MeOH) which then can be rapidly biodegraded by indigenous microorganisms.

Gabriele Centi; Siglinda Perathoner

2003-01-01T23:59:59.000Z

302

Lack of induction of O/sup 6/-methylguanine-DNA methyltransferase in mammalian cells treated with N-methyl-N'-nitro-N-nitrosoguanidine  

SciTech Connect

A synthetic DNA substrate containing O/sup 6/-methyl(8-/sup 3/H)-guanine was used to assay demethylation of the premutagenic base by O/sup 6/-methylguanine-DNA methyltransferase in extracts of HeLa cells, Chinese hamster ovary cells and normal rat kidney cells which had been treated with multiple doses of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). No induction of methyltransferase activity was observed in any of the cell lines tested. Constitutive levels of methyltransferase in cell lines proficient (Mex/sup +/) in O/sup 6/-methylguanine repair were decreased in a dose-dependent fashion by either single or multiple treatments with MNNG over a broad range of dose levels. Recovery of constitutive levels of activity required 24- to 48-h incubation periods. Repair deficient (Mex/sup -/) cell lines lacked both constitutive and inducible methyltransferase activity. 42 references, 4 figures, 1 table.

Foote, R.S.; Mitra, S.

1984-01-01T23:59:59.000Z

303

Characteristics of the performance and emissions of a HSDI diesel engine running with cottonseed oil or its methyl ester and their blends with diesel fuel  

Science Journals Connector (OSTI)

An experimental study has been conducted to evaluate the use of various blends of cottonseed oil or its methyl ester (bio-diesel) with diesel fuel, in blend ratios from 10/90 up to 100/0, in a fully instrumented, four-stroke, High Speed Direct Injection (HSDI), Ricardo/Cussons 'Hydra' diesel engine. The tests were conducted using each of the above fuel blends or neat fuels, with the engine working at a medium and a high load. Volumetric fuel consumption, exhaust smokiness and exhaust-regulated gas emissions such as nitrogen oxides, carbon monoxide and unburnt hydrocarbons were measured. The differences in the performance and exhaust emissions from the baseline operation of the engine, that is, when working with neat diesel fuel, were determined and compared, as well as the differences between cottonseed oil or its methyl ester and their blends. Theoretical aspects of diesel engine combustion were used to aid the correct interpretation of the engine behaviour.

Constantine D. Rakopoulos; Kimon A. Antonopoulos; Dimitrios C. Rakopoulos; Emmanuel C. Kakaras; Efthimios G. Pariotis

2007-01-01T23:59:59.000Z

304

A comparative evaluation of Al 2 O 3 coated low heat rejection diesel engine performance and emission characteristics using fuel as rice bran and pongamia methyl ester  

Science Journals Connector (OSTI)

In this study for the first time a nanoceramic Al 2 O 3 was used as a coatingmaterial in the low heat rejection engine concept. Experiments were conducted on single cylinder four stroke water cooled and direct injection diesel engine. First the engine was tested at different load conditions without coating. Then combustion chamber surfaces (cylinder head cylinder liner valves and piston crown face) were coated with nanoceramic material of Al 2 O 3 using plasma spray method. Comparative evaluation on performance and emission characteristics using fuel as rice bran methyl ester pongamia methyl ester and biodiesel/diesel fuel mixtures was studied in the ceramiccoated and uncoated engines under the same running conditions. An increase in engine power and a decrease in specific fuel consumption as well as significant improvements in exhaust gas emissions (except NOx) and smoke density were observed in the ceramiccoated engines compared with those of the uncoated engine.

M. Mohamed Musthafa; S. P. Sivapirakasam; M. Udayakumar

2010-01-01T23:59:59.000Z

305

A theoretical study of the ion pair SN2 reaction between lithium isocyanates with methyl fluoride with inversion and retention mechanism  

Science Journals Connector (OSTI)

This paper is devoted to a detailed theoretical study of an ion pair SN2 reaction LiNCO+CH3F in the gas phase and in solution at the level of MP2(full)/6-31+G**//HF/6-31+G**. Two possible reaction mechanisms, inversion and retention, are discussed. There are eight possible reaction pathways. The inversion mechanism is more favorable no matter in the gas phase or in solution based on analyses of the transition structures. Methyl isocyanate should form preferentially in the gas phase and more stable methyl cyanate is the main product in solution. The retardation of the reaction in solvents was attributed to the difference in solvation in the separated reactants and in the transition state.

Hua-jie Zhu; Yi Ren; Jie Ren

2004-01-01T23:59:59.000Z

306

Experimental studies on poly methyl methacrylate based gel polymer electrolytes for application in electrical double layer capacitors  

Science Journals Connector (OSTI)

Studies have been carried out on gel polymer electrolytes comprising poly methyl methacrylate (PMMA)-ethylene carbonate (EC)–propylene carbonate (PC)–salts, LiClO4, NaClO4 and (C2H5)4NClO4 (TEAClO4) with a view to using them as electrolytes in electrical double layer capacitors (EDLCs) based on activated charcoal powder electrodes. The optimum composition of gel electrolytes, PMMA (20?wt%)–EC?:?PC (1?:?1 v/v)–1.0?M salts exhibit high ionic conductivity of the order of ~10?3?S?cm?1 at room temperature with good mechanical/dimensional stability, suitable for their application in EDLCs. The EDLCs have been characterized using linear sweep cyclic voltammetry, galvanostatic charge–discharge tests and ac impedance spectroscopy. The values of capacitance of 68–151?mF?cm?2 (equivalent to single electrode specific capacitance of 38–78?Fg?1 of activated charcoal powder) have been observed. These values correspond to a specific energy of 5.3–10.8?Wh?kg?1 and a power density of 0.19–0.22?kW?kg?1. The capacitance values have been observed to be stable up to 5000 voltammetric cycles or even more. A comparison of studies shows the predominant role of anions of the gel electrolytes in the capacitive behaviour of EDLCs.

S A Hashmi; Ashok Kumar; S K Tripathi

2007-01-01T23:59:59.000Z

307

Evaluation of RME (rapeseed methyl ester) and mineral diesel fuels behaviour in quiescent vessel and EURO 5 engine  

Science Journals Connector (OSTI)

Abstract Alternative diesel fuels for internal combustion engines have grown significantly in interest in the last decade. This is due to the potential benefits in pollutant emissions and particulate matter reduction. Nevertheless at possible increase in nitrogen oxide (NOx), and almost certainly increase of fuel consumption have been observed. In this paper, mineral diesel and RME (rapeseed methyl ester) fuels have been characterized in a non-evaporative spray chamber and in an optically-accessible single-cylinder engine using a Common Rail injector (8 holes, 148° cone opening angle and 480 cc/30s@10 MPa flow number) to measure the spatial fuel distribution, the temporal evolution and the vaporization–combustion processes. The injection process and mixture formation have been investigated at the Urban Driving Cycle ECE R15: 1500 rpm at 0.2 MPa of break mean effective pressure. Characteristic parameters of the spray like penetration length and liquid fuel distribution have been analysed and they have been correlated with the exhaust gaseous and particulate matter emissions. In the spray-analysis in non-evaporative conditions, short events (pilot) are mostly affected by asymmetries in the fuel distributions with noticeable standard deviations at low injected quantities. In the engine tests, the jets reached immediately the stabilization. A comparative analysis on the liquid phase of the spray, in non-evaporative and evaporative conditions, has permitted to investigate better the mixture formation. Its effect on pollutant emissions has been analysed for both fuels.

Luigi Allocca; Ezio Mancaruso; Alessandro Montanaro; Luigi Sequino; Bianca Maria Vaglieco

2014-01-01T23:59:59.000Z

308

An experimental study of gaseous exhaust emissions of diesel engine using blend of natural fatty acid methyl ester  

Science Journals Connector (OSTI)

Vegetable oil form in Natural Fatty Acid Methyl Ester (FAME) has their own advantages: first of all they are available everywhere in the world. Secondly, they are renewable as the vegetables which produce oil seeds can be planted year after year. Thirdly, they are friendly with our environment, as they seldom contain sulphur element in them. This makes vegetable fuel studies become current among the various popular investigations. This study is attempt to optimization of using blend FAME on diesel engine by experimental laboratory. The investigation experimental project is comparison between using blend FAME and base diesel fuel. The engine experiment is conducted with YANMAR TF120M single cylinder four stroke diesel engine set-up at variable engine speed with constant load. The data have been taken at each point of engine speed during the stabilized engine-operating regime. Measurement of emissions parameters at difference engine speed conditions have generally indicated lower in emission NOx, but slightly higher on CO2 emission. The result also shown that the blends FAME are good in fuel consumption and potentially good substitute fuels for diesel engine

Agung Sudrajad; Ismail Ali; Khalid Samo; Danny Faturachman

2012-01-01T23:59:59.000Z

309

Investigation on combustion characteristics of crude rice bran oil methyl ester blend as a heavy duty automotive engine fuel  

Science Journals Connector (OSTI)

In the present work, an attempt was made to test the suitability of crude rice bran oil methyl ester (CRBME) blend as a heavy duty automotive engine fuel. A four stroke, six cylinder direct injection 117.6 kW turbo-charged compression ignition (CI) engine was used for the work. The operation of the engine with CRBME blend showed that the peak pressure increased with lower maximum rate of pressure rise and maximum heat release rate with shorter delay period. Burning rate of the CRBME blend was slower and required a higher crank angle to complete the combustion cycle when compared to diesel. The brake thermal efficiency of the CRBME blend was lower than that of diesel at all speeds except at 2300rpm. As the measured combustion and performance parameters for CRBME blend differs only by a smaller magnitude when compared with diesel, this investigation ensures the suitability of the CRBME blend as fuel for heavy duty automotive engine without any design modifications [Received: August 12, 2010; Accepted: August 29, 2010

S. Saravanan; G. Nagarajan; S. Sampath

2011-01-01T23:59:59.000Z

310

Self-supported poly(methyl methacrylate–acrylonitrile–vinyl acetate)-based gel electrolyte for lithium ion battery  

Science Journals Connector (OSTI)

Self-supported gel polymer electrolyte (GPE) was prepared based on copolymer, poly(methyl methacrylate–acrylonitrile–vinyl acetate) (P(MMA–AN–VAc)). The copolymer P(MMA–AN–VAc) was synthesized by emulsion polymerization and the copolymer membrane was prepared through phase inversion. The structure and the performance of the copolymer, the membrane and the GPE were characterized by FTIR, NMR, SEM, XRD, DSC/TG, LSV, CA, and EIS. It is found that the copolymer was formed through the breaking of double bond CC in each monomer. The membrane has low crystallinity and has low glass transition temperature, 39.1 °C, its thermal stability is as high as 310 °C, and its mechanical strength is improved compared with P(MMA–AN). The GPE is electrochemically stable up to 5.6 V (vs. Li/Li+) and its conductivity is 3.48 × 10?3 S cm?1 at ambient temperature. The lithium ion transference number in the GPE is 0.51 and the conductivity model of the GPE is found to obey the Vogel–Tamman–Fulcher (VTF) equation.

Y.H. Liao; D.Y. Zhou; M.M. Rao; W.S. Li; Z.P. Cai; Y. Liang; C.L. Tan

2009-01-01T23:59:59.000Z

311

Poly(methyl methacrylate) as a self-assembled gate dielectric for graphene field-effect transistors  

SciTech Connect

We investigate poly(methyl methacrylate) (PMMA) as a low thermal budget organic gate dielectric for graphene field effect-transistors (GFETs) based on a simple process flow. We show that high temperature baking steps above the glass transition temperature (?130?°C) can leave a self-assembled, thin PMMA film on graphene, where we get a gate dielectric almost for “free” without additional atomic layer deposition type steps. Electrical characterization of GFETs with PMMA as a gate dielectric yields a dielectric constant of k?=?3.0. GFETs with thinner PMMA dielectrics have a lower dielectric constant due to decreased polarization arising from neutralization of dipoles and charged carriers as baking temperatures increase. The leakage through PMMA gate dielectric increases with decreasing dielectric thickness and increasing electric field. Unlike conventional high-k gate dielectrics, such low-k organic gate dielectrics are potentially attractive for devices such as the proposed Bilayer pseudoSpin Field-Effect Transistor or flexible high speed graphene electronics.

Sanne, A.; Movva, H. C. P.; Kang, S.; McClellan, C.; Corbet, C. M.; Banerjee, S. K. [Microelectronics Research Center, University of Texas, Austin, Texas 78758 (United States)

2014-02-24T23:59:59.000Z

312

Investigations on the quality of dispersion of nanofillers in poly(methyl methacrylate) composites by creep-recovery experiments  

Science Journals Connector (OSTI)

Nanocomposites with poly(methyl methacrylate) as the matrix and three different types of fillers namely nanoclay nanosilica and multiwalled carbon nanotubes were prepared using various methods for the dispersion of the particular fillers. The morphology was analyzed using light and transmission electron microscopy. The composites were investigated by creep-recovery experiments in addition to conventional dynamic-mechanical measurements. While the changes of the storage modulus G ? are not very distinctive for low filler concentrations the differences in the recoverable compliance measured by creep-recovery experiments become significant. The better the quality of dispersion the higher is the recoverable compliance. This finding is explained by an interaction of macromolecules with the particle surface which is more pronounced for well dispersed particles as they offer a larger surface area. Therefore creep-recovery measurements can very sensitively be used for the determination of the quality of dispersion. This rheological method integrates over the state of the whole sample whereas transmission electron microscopy analyses only a tiny part of it.

Christian Triebel; Nikolaos Katsikis; Hana Stará

2010-01-01T23:59:59.000Z

313

Numerical study of the effect of oxygenated blending compounds on soot formation in shock tubes  

SciTech Connect

This numerical study deals with the influence of blends on the amount of soot formed in shock tubes, which were simulated by assuming a homogeneous plug flow reactor model. For this purpose, first, the reaction model used here was validated against experimental results previously obtained in the literature. Then, the soot volume fractions of various mixtures of methyl tert-butyl ether (MTBE)-benzene, isobutene-benzene, methanol-benzene, and ethanol-benzene diluted in argon were simulated and compared to the results of benzene-argon pyrolysis at 1721 K and 5.4 MPa. For MTBE, isobutene, methanol, and ethanol, small amounts of additives to benzene-argon mixtures promoted soot formation, for the shock tube model assumed, while higher concentrations of these additives led to smaller soot volume fractions in comparison to pure benzene-argon pyrolysis. The most significant soot promotion effect was found for the additives MTBE and isobutene. The channel for MTBE decomposition producing isobutene and methanol is very effective at temperatures beyond 1200 K. Thus, both MTBE-benzene and isobutene-benzene mixtures diluted in argon showed rather similar behavior in regard to soot formation. Special emphasis was directed toward the causes for the concentration-dependent influence of the blends on the amount of soot formed. Aromatic hydrocarbons and acetylene were identified as key gas-phase species that determine the trends in the formation of soot of various mixtures. From reaction flux analysis for phenanthrene, it was deduced that the combinative routes including phenyl species play a major role in forming PAHs, especially at early reaction times. It is found that the additives play an important role in providing material to grow side chains, such as by reaction channels including phenylacetylene or benzyl, which are confirmed to form aromatic hydrocarbons and thus to influence the amount of soot formed, particularly when the concentrations of the blends are increased. (author)

Boehm, H. [Physikalische Chemie I, Universitaet Bielefeld (Germany); Braun-Unkhoff, M. [Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Stuttgart (Germany)

2008-04-15T23:59:59.000Z

314

Later Tertiary Leporidae of North America  

E-Print Network (OSTI)

Saskatchewan. Generic characters. Compared with Megalagus brachyodon, cheek-teeth less hypsodont, molarization of premolars less advanced, molars less reduced, and maxilla and mandibular ramus narrower in premolar region; P3-P4 each having shallow hypostria... the Myton Pocket in Utah and M. wyomingensis from Badwater Creek, Wyoming, specimens from the Wagonhound member of the Uinta Eocene, the Duchesne River (Rand- lett horizon), and the Swift Current Creek beds of Saskatchewan have been referred to this genus...

Dawson, M. R.

1958-05-01T23:59:59.000Z

315

Tertiary paleomagnetic results from east Kalimantan  

E-Print Network (OSTI)

0 Fig. l. Major transcurrent faults in Southeast Asia. Ic = Indochina; M = Malaysia; SCS = South China Sea; B = Kalimantan; J = Java Sea; S = Sulawesi. eastern Kalimantsn ranging from Eocene to Plio ? Pleistocene age. The result of this study... al. , 1983), the Philippines (McCabe et al. , 1987), Sulawesi (Haile, 1978; Sasajima et al. , 1980; Otofuji et al. , 1981) and Indochina (Giang, 1982; McCabe et sl. , 1988). The pole from this study is indistin- guisha. ble at the 95% confidence...

Lumadyo, Leonard E. D

2012-06-07T23:59:59.000Z

316

Ion exchange as a tertiary treatment  

E-Print Network (OSTI)

that these treatment methods are capable of removing an appreciable amount of objection? able dissolved organic and inorganic materi aJ s from the final effluent. Color and turbidity were greatly reduced and an appreciable amount of the suspended solids were... Demand Re Resin A General Anion mg. /1. MLVSS psi gpm Milligrams per I. iter Mixed Liquor Volatile Suspended Solids Pounds per Square Inch Gallons per Minute. mm Mi llimeters kgr meq ml Kilogram Milliequilavent Millimeter S. S. BV...

Westervelt, Ronald David

1968-01-01T23:59:59.000Z

317

Gas leakage and distribution characteristics of methyl bromide and sulfuryl fluoride during fumigations in a pilot flour mill  

Science Journals Connector (OSTI)

The half-loss time (HLT) is used as an indicator to quantify gas leakage rates during methyl bromide (MB) and sulfuryl fluoride (SF) fumigations. Comparisons of \\{HLTs\\} between three MB and three SF fumigations were quantified in the Hal Ross pilot flour mill, Department of Grain Science and Industry, Kansas State University, USA. The sealing quality or gas tightness of the mill before each fumigation was verified by a pressurization test. Fumigant concentrations during the six fumigations were monitored continuously at 30 locations among the five mill floors during the 24 h fumigation period. A weather station on the mill roof monitored barometric pressure, wind speed and direction, temperature, and relative humidity. A data logger on each mill floor recorded temperature and relative humidity. The pressurization test showed that the relationship between airflow rate and building static pressure varied among the fumigations despite the same areas being sealed by two separate fumigation service providers due to environmental conditions not being identical among the fumigations. Concentration differences of both fumigants within the mill ranged from 2 to 7 g/m3. The observed \\{HLTs\\} for the MB and SF fumigations were in the range of 3.61 to 28.64 h and 9.97 to 31.65 h, respectively, and were inversely related only to wind speeds during fumigation and not any other environmental conditions recorded. In our study, the fumigant leakage rate was found to be predominantly a function of wind speed rather than inherent gas characteristics of MB and SF.

Watcharapol Chayaprasert; Dirk E. Maier; Bhadriraju Subramanyam; Michelle Hartzer

2012-01-01T23:59:59.000Z

318

Accurate and Reliable Quantification of Total Microalgal Fuel Potential as Fatty Acid Methyl Esters by in situ Transesterfication  

SciTech Connect

In the context of algal biofuels, lipids, or better aliphatic chains of the fatty acids, are perhaps the most important constituents of algal biomass. Accurate quantification of lipids and their respective fuel yield is crucial for comparison of algal strains and growth conditions and for process monitoring. As an alternative to traditional solvent-based lipid extraction procedures, we have developed a robust whole-biomass in situ transesterification procedure for quantification of algal lipids (as fatty acid methyl esters, FAMEs) that (a) can be carried out on a small scale (using 4-7 mg of biomass), (b) is applicable to a range of different species, (c) consists of a single-step reaction, (d) is robust over a range of different temperature and time combinations, and (e) tolerant to at least 50% water in the biomass. Unlike gravimetric lipid quantification, which can over- or underestimate the lipid content, whole biomass transesterification reflects the true potential fuel yield of algal biomass. We report here on the comparison of the yield of FAMEs by using different catalysts and catalyst combinations, with the acid catalyst HCl providing a consistently high level of conversion of fatty acids with a precision of 1.9% relative standard deviation. We investigate the influence of reaction time, temperature, and biomass water content on the measured FAME content and profile for 4 different samples of algae (replete and deplete Chlorella vulgaris, replete Phaeodactylum tricornutum, and replete Nannochloropsis sp.). We conclude by demonstrating a full mass balance closure of all fatty acids around a traditional lipid extraction process.

Laurens, L. M. L.; Quinn, M.; Van Wychen, S.; Templeton, D. W.; Wolfrum, E. J.

2012-04-01T23:59:59.000Z

319

Dissociation of internal energy-selected methyl bromide ion revealed from threshold photoelectron-photoion coincidence velocity imaging  

SciTech Connect

Dissociative photoionization of methyl bromide (CH{sub 3}Br) in an excitation energy range of 10.45–16.90 eV has been investigated by using threshold photoelectron-photoion coincidence (TPEPICO) velocity imaging. The coincident time-of-flight mass spectra indicate that the ground state X{sup 2}E of CH{sub 3}Br{sup +} is stable, and both A{sup 2}A{sub 1} and B{sup 2}E ionic excited states are fully dissociative to produce the unique fragment ion of CH{sub 3}{sup +}. From TPEPICO 3D time-sliced velocity images of CH{sub 3}{sup +} dissociated from specific state-selected CH{sub 3}Br{sup +} ion, kinetic energy release distribution (KERD) and angular distribution of CH{sub 3}{sup +} fragment ion are directly obtained. Both spin-orbit states of Br({sup 2}P) atom can be clearly observed in fast dissociation of CH{sub 3}Br{sup +}(A{sup 2}A{sub 1}) ion along C–Br rupture, while a KERD of Maxwell-Boltzmann profile is obtained in dissociation of CH{sub 3}Br{sup +}(B{sup 2}E) ion. With the aid of the re-calculated potential energy curves of CH{sub 3}Br{sup +} including spin-orbit coupling, dissociation mechanisms of CH{sub 3}Br{sup +} ion in A{sup 2}A{sub 1} and B{sup 2}E states along C–Br rupture are revealed. For CH{sub 3}Br{sup +}(A{sup 2}A{sub 1}) ion, the CH{sub 3}{sup +} + Br({sup 2}P{sub 1/2}) channel is occurred via an adiabatic dissociation by vibration, while the Br({sup 2}P{sub 3/2}) formation is through vibronic coupling to the high vibrational level of X{sup 2}E state followed by rapid dissociation. C–Br bond breaking of CH{sub 3}Br{sup +}(B{sup 2}E) ion can occur via slow internal conversion to the excited vibrational level of the lower electronic states and then dissociation.

Tang, Xiaofeng [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China) [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China); National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 (China); Zhou, Xiaoguo, E-mail: xzhou@ustc.edu.cn, E-mail: yanbing@jlu.edu.cn; Liu, Shilin [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China) [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China); Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); Sun, Zhongfa [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China)] [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China); Liu, Fuyi; Sheng, Liusi [National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 (China)] [National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 (China); Yan, Bing, E-mail: xzhou@ustc.edu.cn, E-mail: yanbing@jlu.edu.cn [Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China)] [Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China)

2014-01-28T23:59:59.000Z

320

Synthesis of 6-Methyl-9-propyldibenzothiophene-4-ol amended to 9-isopropyl-6-methyldibenzothiophene-4-ol. Final technical report, July 25, 1991--January 25, 1993  

SciTech Connect

This is a draft final technical report on Task 1 of a contract to synthesize 6-Methyl-9-propyldibenzothiophene-4-ol, as amended to 9- isopropyl-6-methyldibenzothiophene-4-ol. This report is a compilation of data presented in earlier reports. The first annual report dealt with an attempted synthesis of 4-methoxy-6-methyl-9- propyldibenzothiophene (the original target compound), the successful synthesis and delivery of 200 grams of the sulfide 1,4-diethyl-2- [(2{prime}-methoxyphenyl)-thio]benzene, and initial work on a new synthesis route for the preparation of the new target compound 9- isopropyl-6-methyldibenzothiophene-4-ol. The change to the new target compound and the new synthesis route became necessary when it was learned that the sulfide mixture could not be cyclized to the substituted dibenzothiophene mixture. The second annual report described the successful preparation of 45 g of the new target compound using the new synthesis route. Subsequently funds were provided to synthesize an additional 45 g of the new target using the same reaction scheme. This task was recently completed.

Eisenbraun, E.J.

1992-02-17T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Effect of palm methyl ester-diesel blends performance and emission of a single-cylinder direct-injection diesel engine  

Science Journals Connector (OSTI)

The purpose of this study is to investigate engine performance and exhaust emission when using several blends of neat palm oil methyl ester (POME) with conventional diesel (D2) in a small direct injection diesel engine and to compare the outcomes to that of the D2 fuel. Engine performances exhaust emissions and some other important parameters were observed as a function of engine load and speed. In addition the effect of modifying compression ratio was also carried out in this study. From the engine experimental work neat and blended fuels behaved comparably to diesel (D2) in terms of fuel consumption thermal efficiency and rate of heat released. Smoke density showed better results than that emitted by D2 operating under similar conditions due to the presence of inherited oxygen and lower sulphur content in the biofuel and its blends. The emissions of CO CO2 and HC were also lower using blended mixtures and in its neat form. However NOx concentrations were found to be slight higher for POME and its blends and this was largely due to higher viscosity of POME and possibly the presence of nitrogen in the palm methyl ester. General observation indicates that biofuel blends can be use without many difficulties in this type of engine but for optimized operation minor modifications to the engine and its auxiliaries are required.

Mazlan Said; Azhar Abdul Aziz

2012-01-01T23:59:59.000Z

322

Study of degumming process and evaluation of oxidative stability of methyl and ethyl biodiesel of Jatropha curcas L. oil from three different Brazilian states  

Science Journals Connector (OSTI)

Abstract This work describes the production of biodiesel from Jatropha curcas oil. The kernel samples provided by Embrapa-PI, were first crushed in a blender and then subjected to extraction with hexane. The oil yield was between 54.71 ± 0.47 and 64.16 ± 2.88%. The J. curcas oil was then submitted to two different kinds of degumming, first with water and second with H3PO4 to evaluate the influence of these processes in the yield of the transesterification reaction. Methyl and ethyl biodiesel prepared from the degummed oil with H3PO4 had higher conversions than those prepared with the degummed with water. Therefore, among the processes of degumming studied, H3PO4 was more suitable for the treatment of J. curcas oil. The study shows the results about oxidation stability were good, because the biodiesels methyl and ethyl biodiesel have induction period at 13.51 h and 13.03 h without antioxidant addition when submitted a Rancimat text. Such biodiesels had their physicochemical parameters defined under the specifications of ANP Resolutions n° 14/2012 (ANP- National Agency of Petroleum, Natural Gas and Biofuels from Brazil). The results showed that J. curcas cultivation in Brazil is an adequate source for biodiesel production, considering the technical standards available.

Francisca Diana da Silva Araújo; Iranildo C. Araújo; Isabella Cristhina G. Costa; Carla Verônica Rodarte de Moura; Mariana H. Chaves; Eugęnio Celso E. Araújo

2014-01-01T23:59:59.000Z

323

IMPACT OF OXYGENATED FUEL ON DIESEL ENGINE PERFORMANCE AND EMISSIONS  

SciTech Connect

As evidenced by recent lawsuits brought against operators of large diesel truck fleets [1] and by the Consent Decree brought against the heavy-duty diesel manufacturers [2], the environmental and health effects of diesel engine emissions continue to be a significant concern. Reduction of diesel engine emissions has traditionally been achieved through a combination of fuel system, combustion chamber, and engine control modifications [3]. Catalytic aftertreatment has become common on modern diesel vehicles, with the predominant device being the diesel oxidation catalytic converter [3]. To enable advanced after-treatment devices and to directly reduce emissions, significant recent interest has focused on reformulation of diesel fuel, particularly the reduction of sulfur content. The EPA has man-dated that diesel fuel will have only 15 ppm sulfur content by 2007, with current diesel specifications requiring around 300 ppm [4]. Reduction of sulfur will permit sulfur-sensitive aftertreatment devices, continuously regenerating particulate traps, NOx control catalysts, and plasma assisted catalysts to be implemented on diesel vehicles [4]. Another method of reformulating diesel fuel to reduce emissions is to incorporate oxygen in the fuel, as was done in the reformulation of gasoline. The use of methyl tertiary butyl ether (MTBE) in reformulated gasoline has resulted in contamination of water resources across the country [5]. Nonetheless, by relying on the lessons learned from MTBE, oxygenation of diesel fuel may be accomplished without compromising water quality. Oxygenation of diesel fuel offers the possibility of reducing particulate matter emissions significantly, even for the current fleet of diesel vehicles. The mechanism by which oxygen content leads to particulate matter reductions is still under debate, but recent evidence shows clearly that ''smokeless'' engine operation is possible when the oxygen content of diesel fuel reaches roughly 38% by weight [6]. The potential improvements in energy efficiency within the transportation section, particularly in sport utility vehicles and light-duty trucks, that can be provided by deployment of diesel engines in passenger cars and trucks is a strong incentive to develop cleaner burning diesel engines and cleaner burning fuels for diesel engines. Thus, serious consideration of oxygenated diesel fuels is of significant practical interest and value to society. In the present work, a diesel fuel reformulating agent, CETANERTM, has been examined in a popular light-medium duty turbodiesel engine over a range of blending ratios. This additive is a mixture of glycol ethers and can be produced from dimethyl ether, which itself can be manufactured from synthesis gas using Air Products' Liquid Phase Dimethyl Ether (LPDME TM) technology. CETANERTM is a liquid, has an oxygen content of 36 wt.%, has a cetane number over 100 and is highly miscible in diesel fuel. This combination of physical and chemical properties makes CETANERTM an attractive agent for oxygenating diesel fuel. The present study considered CETANERTM ratios from 0 to 40 wt.% in a California Air Resources Board (CARB) specification diesel fuel. Particulate matter emissions, gaseous emissions and in-cylinder pressure traces were monitored over the AVL 8-Mode engine test protocol [7]. This paper presents the results from these measurements and discusses the implications of using high cetane number oxygenates in diesel fuel reformulation.

Boehman, Andre L.

2000-08-20T23:59:59.000Z

324

Total Crude Oil and Petroleum Products Imports by Area of Entry  

U.S. Energy Information Administration (EIA) Indexed Site

by Area of Entry by Area of Entry Product: Total Crude Oil and Petroleum Products Crude Oil Natural Gas Plant Liquids and Liquefied Refinery Gases Pentanes Plus Liquefied Petroleum Gases Ethane Ethylene Propane Propylene Normal Butane Butylene Isobutane Isobutylene Other Liquids Hydrogen/Oxygenates/Renewables/Other Hydrocarbons Oxygenates (excl. Fuel Ethanol) Methyl Tertiary Butyl Ether (MTBE) Other Oxygenates Renewable Fuels (incl. Fuel Ethanol) Fuel Ethanol Biomass-Based Diesel Fuel Other Renewable Diesel Fuel Other Renewable Fuels Other Hydrocarbons Unfinished Oils Naphthas and Lighter Kerosene and Light Gas Oils Heavy Gas Oils Residuum Motor Gasoline Blending Components (MGBC) MGBC - Reformulated, RBOB MGBC - Conventional MGBC - Conventional, CBOB MGBC - Conventional, GTAB MGBC - Other Conventional Aviation Gasoline Blending Components Finished Petroleum Products Finished Motor Gasoline Reformulated Gasoline Reformulated Blended w/ Fuel Ethanol Conventional Gasoline Conventional Blended w/ Fuel Ethanol Conventional Blended w/ Fuel Ethanol, Ed55 and Lower Conventional Other Finished Aviation Gasoline Kerosene-Type Jet Fuel Kerosene-Type Bonded Aircraft Fuel Other Bonded Aircraft Fuel Kerosene Distillate Fuel Oil Distillate F.O., 15 ppm and under Distillate F.O., Bonded, 15 ppm and under Distillate F.O., Other, 15 ppm and under Distillate F.O., Greater than 15 to 500 ppm Distillate F.O., Bonded, Greater than 15 to 500 ppm Distillate F.O., Other, Greater than 15 to 500 ppm Distillate F.O., Greater than 500 ppm Distillate F.O., Greater than 500 to 2000 ppm Distillate F.O., Bonded, Greater than 500 to 2000 ppm Distillate F.O., Other, Greater than 500 ppm to 2000 ppm Distillate F.O., Greater than 2000 ppm Distillate F.O., Bonded, Greater than 2000 ppm Distillate F.O., Other, Greater than 2000 ppm Residual Fuel Oil Residual F.O., Bonded Ship Bunkers, Less than 0.31% Sulfur Residual F.O., Bonded Ship Bunkers, 0.31 to 1.00% Sulfur Residual F.O., Bonded Ship Bunkers, Greater than 1.00% Sulfur Petrochemical Feedstocks Naphtha for Petrochem. Feed. Use Other Oils for Petrochem Feed. Use Special Naphthas Lubricants Waxes Petroleum Coke Asphalt and Road Oil Miscellaneous Products Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day

325

Two-dimensional hydrogen-bonded polymers in the crystal structures of the ammonium salts of phen­oxy­acetic acid, (4-fluoro­phen­oxy)acetic acid and (4-chloro-2-methyl­phen­oxy)acetic acid  

Science Journals Connector (OSTI)

The crystal of the isomorphous anhydrous ammonium salts of phen­oxy­acetic acid and (4-fluoro­phen­oxy)acetic acid and that of the hemihydrate ammonium salt of 4-chloro-2-methyl­phen­oxy)acetic acid show two-dimensional layered structures based on conjoined cyclic hydrogen-bonded motifs.

Smith, G.

2014-11-19T23:59:59.000Z

326

Charting a dynamic DNA methylation landscape of the human Michael J. Ziller1,2,3, Hongcang Gu1, Fabian Mller3,4, Julie Donaghey1,2,3, Linus T.-Y.  

E-Print Network (OSTI)

Charting a dynamic DNA methylation landscape of the human genome Michael J. Ziller1,2,3, Hongcang Center, University of TĂĽbingen, TĂĽbingen, Germany 7Program in Translational NeuroPsychiatric GenomicsGs participate in genomic regulation. Here we report the in depth analysis of 42 whole genome bisulfite

327

Experimental Autoignition of C4-C6 Saturated and Unsaturated Methyl and Ethyl Esters H. Bennadji*, J. Biet, L. Coniglio-Jaubert, F. Billaud, P.A. Glaude, F. Battin-Leclerc  

E-Print Network (OSTI)

. Keywords: Biodiesel, Methyl esters, Ethyl esters, Shock tube, Reaction mechanism. 1. Introduction Biodiesel is an alternative fuel which can be used directly to a diesel engine without modifying the engine system. Basically separate infrastructure. The use of biodiesel in conventional diesel engines results in substantial

Boyer, Edmond

328

Study downplays health concerns  

SciTech Connect

A government-funded study has concluded that reformulated gasoline containing methyl tert-butyl ether (MTBE) does not increase short-term health risks when compared with gasoline that does not contain the additive. The study, performed by the Health Effects Institute (Cambridge, MA), compared data from dozens of animal, human, and epidemiological studies of health effects linked to oxygenates, including MTBE and ethanol, but did not find enough evidence to warrant an immediate reduction in oxygenate use. However, the study did recommend that additional research be conducted on possible health consequences associated with the gasoline additives, including neurotoxic effects, if oxygenates continue to be used long term. Oxygenates have been used in gasoline since 1992, when EPA mandated that several municipalities use MTBE or other oxygenates in reformulated gasoline to reduce carbon monoxide emissions and meet Clean Air Act requirements. Shortly after the program began, residents in areas where the oxygenates were used complained of nausea, headaches, and dizziness. The institute says the study--funded by EPA and the Centers for Disease Control--will be used for a broader review of gasoline oxygenates by the White House Office of Science and Technology Policy.

Stringer, J.

1996-03-13T23:59:59.000Z

329

Modification of Y Zeolite with Alkaline Treatment: Textural Properties and Catalytic Activity for Diethyl Carbonate Synthesis  

Science Journals Connector (OSTI)

(1) Compared to dimethyl carbonate (DMC) and ethanol, DEC has been proposed as a potential fuel oxygenate additive to replace methyl tert-butyl ether (MTBE) because of its high oxygen content (40.6 wt %) and favorable fuel/water partition coefficient. ... For CuY using untreated zeolite as a support, there were only two H2-comsumption peaks at 473 and 681 K, ascribed to the Cu+ located on sites III? and II. ... Dunn, B. C.; Guenneau, C.; Hilton, S. A.; Pahnke, J.; Eyring, E. M.Production of diethyl carbonate from ethanol and carbon monoxide over a heterogeneous catalyst Energy Fuels 2002, 16, 177– 181 ...

Shouying Huang; Pengzhen Chen; Bing Yan; Shengping Wang; Yongli Shen; Xinbin Ma

2013-04-20T23:59:59.000Z

330

Pharmacological characterization of LY233053: A structurally novel tetrazole-substituted competitive N-methyl-D-aspartic acid antagonist with a short duration of action  

SciTech Connect

This study reports the activity of a structurally novel excitatory amino acid receptor antagonist, LY233053 (cis-(+-)-4-((2H-tetrazol-5-yl)methyl)piperidine-2-carboxylic acid), the first tetrazole-containing competitive N-methyl-D-aspartic acid (NMDA) antagonist. LY233053 potently inhibited NMDA receptor binding to rat brain membranes as shown by the in vitro displacement of (3H) CGS19755 (IC50 = 107 +/- 7 nM). No appreciable affinity in (3H)alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) or (3H)kainate binding assays was observed (IC50 values greater than 10,000 nM). In vitro NMDA receptor antagonist activity was further demonstrated by selective inhibition of NMDA-induced depolarization in cortical wedges (IC50 = 4.2 +/- 0.4 microM vs. 40 microM NMDA). LY233053 was effective after in vivo systemic administration in a number of animal models. In neonatal rats, LY233053 selectively blocked NMDA-induced convulsions (ED50 = 14.5 mg/kg i.p.) with a relatively short duration of action (2-4 hr). In pigeons, LY233053 potently antagonized (ED50 = 1.3 mg/kg i.m.) the behavioral suppressant effects of 10 mg/kg of NMDA. However, a dose of 160 mg/kg, i.m., was required to produce phencyclidine-like catalepsy in pigeons. In mice, LY233053 protected against maximal electroshock-induced seizures at lower doses (ED50 = 19.9 mg/kg i.p.) than those that impaired horizontal screen performance (ED50 = 40.9 mg/kg i.p.). Cholinergic and GABAergic neuronal degenerations after striatal infusion of NMDA were prevented by single or multiple i.p. doses of LY233053. In summary, the antagonist activity of LY233053 after systemic administration demonstrates potential therapeutic value in conditions of neuronal cell loss due to NMDA receptor excitotoxicity.

Schoepp, D.D.; Ornstein, P.L.; Leander, J.D.; Lodge, D.; Salhoff, C.R.; Zeman, S.; Zimmerman, D.M. (Eli Lilly and Company, Indianapolis, IN (USA))

1990-12-01T23:59:59.000Z

331

Correlation of hetorogeneous blood flow and uptake of a di-methyl-branched IODO fatty acid in the normal and ischemic dog heart  

SciTech Connect

Myocardial blood flow (MBF) is heterogeneously distributed in normal and ischemic myocardium (myoc). Methylated iodinated fatty acids, like 15-(p-I-125-iodophenyl)-3,3-dimethylpentadecanoic acid (DMIPPA) can be used to study fatty acid metabolism with SPECT. We studied the relationship between DMIPPA uptake and MBF. In 10 open-chest dogs, ischemica was induced in the LAD coronary artery by an extra-corporal bypass system. MBF was measured with Sc-46 labeled microspheres. Fourty min. after DMIPPA iv. (34{plus_minus}4 MBq), hearts were excised and left ventricles were cut into 120 pieces, weighed and radioactivities counted. MBF and DMIPPA uptake were determined by counting in normal and ischemic myoc. Heterogeneity is expressed as the coefficient of variation (CV) and agreement as the CV of the DMIPPA uptake to MBF ratio. A control study, normal flow in LAD, in 4 dogs revealed no differences in MBF or DMIPPA uptake between the cannulated versus native perfused myoc. We conclude the DMIPPA detects ischemia, in which it shows a different relation with MBF compared to normal myoc. DMIPPA is less heterogeneously distributed than MBF and agreement between MFB and DMIPPA uptake decreases during ischemia.

Sloof, G.W.; Visser, F.C.; Comans, E.F.I. [Free Univ. Hospital, Amsterdam (Netherlands)]|[Oak Ridge National Lab., TN (United States)] [and others

1995-05-01T23:59:59.000Z

332

A comparative study of Al2O3 coated LHR engine characteristic using rice bran and mahua methyl ester as a fuel  

Science Journals Connector (OSTI)

In this study, for the first time, a nano material of Al2O3 was used as ceramic layer in low heat rejection engine concepts. The coating was carried out by plasma spray method on the combustion chamber surfaces (cylinder head, cylinder liner, valves and crown surfaces) of the DI diesel engine. A comparative evaluation of Al2O3 coated engine was carried out between two types of biodiesel (methyl ester of rice bran and mahua oil) and diesel. Experiments were conducted on single cylinder, four strokes, water cooled and direct injection diesel engine. The test run was also repeated for uncoated engine and compared. The results indicated that, an increase in engine power (6.3-11.4%) and decrease in specific fuel consumption (0.8-10.9%), as well as significant improvements in exhaust gas emissions (except NOx) and smoke opacity (19.6-28.9%) were observed in Al2O3 coated engine compared with that of the uncoated engine.

M. Mohamed Musthafa; S.P. Sivapirakasam; M. Udayakumar

2012-01-01T23:59:59.000Z

333

Response surface methodology based prediction of engine performance and exhaust emissions of a diesel engine fuelled with canola oil methyl ester  

Science Journals Connector (OSTI)

The objective of this study was to investigate the effect of fuel injection timing and engine speed on engine performance and exhaust emission parameters using a diesel engine running on canola oil methyl ester (COME). COME was produced by means of the transesterification method and tested at full load with various engine speeds by changing fuel injection timing (12 15 and 18?°CA) in a turbocharged direct injection (TDI) diesel engine. The experiments were designed using response surface methodology (RSM) which is one of the well-known design of experiment technique for predicting the responses engine performance and exhaust emission parameters from a second order polynomial equation obtained by modeling the relation between fuel injection timing (t) and engine speed (n) parameters. By using the second order full quadratic RSM models obtained from experimental results responses brake power brake torque brake mean effective pressure brake specific fuel consumption brake thermal efficiency exhaust gas temperature oxygen (O2) oxides of nitrogen (NOx) carbon dioxide (CO2) carbon monoxide (CO) and light absorption coefficient (K) affected from factors t and n were able to be predicted by 95% confidence interval.

2013-01-01T23:59:59.000Z

334

Direct photo-etching of poly(methyl methacrylate) using focused extreme ultraviolet radiation from a table-top laser-induced plasma source  

SciTech Connect

In order to perform material interaction studies with intense extreme ultraviolet (EUV) radiation, a Schwarzschild mirror objective coated with Mo/Si multilayers was adapted to a compact laser-based EUV plasma source (pulse energy 3 mJ at {lambda}=13.5 nm, plasma diameter {approx}300 {mu}m). By 10x demagnified imaging of the plasma a pulse energy density of {approx}75 mJ/cm{sup 2} at a pulse length of 6 ns can be achieved in the image plane of the objective. As demonstrated for poly(methyl methacrylate) (PMMA), photoetching of polymer surfaces is possible at this EUV fluence level. This paper presents first results, including a systematic determination of PMMA etching rates under EUV irradiation. Furthermore, the contribution of out-of-band radiation to the surface etching of PMMA was investigated by conducting a diffraction experiment for spectral discrimination from higher wavelength radiation. Imaging of a pinhole positioned behind the plasma accomplished the generation of an EUV spot of 1 {mu}m diameter, which was employed for direct writing of surface structures in PMMA.

Barkusky, Frank; Peth, Christian; Bayer, Armin; Mann, Klaus [Laser-Laboratorium-Goettingen e.V., Hans-Adolf-Krebs-Weg 1, D-37077 Goettingen (Germany)

2007-06-15T23:59:59.000Z

335

Direct photo-etching of poly(methyl methacrylate) using focused extreme ultraviolet radiation from a table-top laser-induced plasma source  

Science Journals Connector (OSTI)

In order to perform material interaction studies with intense extreme ultraviolet(EUV)radiation a Schwarzschild mirror objective coated with Mo/Si multilayers was adapted to a compact laser-based EUVplasma source (pulse energy 3 ? mJ ? at ? ? = 13.5 ? nm plasma diameter ? 300 ? ? m ). By 10 × demagnified imaging of the plasma a pulse energy density of ? 75 ? mJ ? cm 2 at a pulse length of 6 ns can be achieved in the image plane of the objective. As demonstrated for poly(methyl methacrylate) (PMMA) photoetching of polymer surfaces is possible at this EUV fluence level. This paper presents first results including a systematic determination of PMMA etching rates under EUVirradiation. Furthermore the contribution of out-of-band radiation to the surface etching of PMMA was investigated by conducting a diffraction experiment for spectral discrimination from higher wavelength radiation. Imaging of a pinhole positioned behind the plasma accomplished the generation of an EUV spot of 1 ? ? m diameter which was employed for direct writing of surface structures in PMMA.

Frank Barkusky; Christian Peth; Armin Bayer; Klaus Mann

2007-01-01T23:59:59.000Z

336

Engine performance and emissions from the combustion of low-temperature Fischerâ??Tropsch synthetic diesel fuel and biodiesel rapeseed methyl ester blends  

Science Journals Connector (OSTI)

The combustion of oxygenated biodiesel (rapeseed methyl ester (RME)) improves the engine-out particulate matter, hydrocarbon and carbon monoxide (CO) emissions, while the low-temperature Fischerâ??Tropsch synthetic paraffinic diesel fuel improves engine-out NOx, CO, hydrocarbon and particulate matter emissions. Blending synthetic diesel (SD) fuel with oxygenated biodiesel could unlock potential performance synergies in the fuel properties (e.g. O2 content in RME and high cetane number of the synthetic fuels) of such blends and benefit engine performance and emissions. The combustion of synthetic diesel fuel/RME blend, named synthetic diesel B50, has shown similar combustion characteristics to diesel fuel, while simultaneous improvements in engine efficiency and smoke-NOx trade-off were achieved by taking advantage of the fuel's properties. The engine thermal efficiency was dependent on the fuel type, and followed the general trend: synthetic diesel > SDB50 > diesel > RME. Therefore, it has been shown that the design of a synthetic fuel with properties similar to the fuel blends presented in this work could improve engine-out NOx, smoke and hydrocarbon emissions and maintain or improve engine performance.

Kampanart Theinnoi; Athanasios Tsolakis; Sathaporn Chuepeng; Andrew P.E. York; Roger F. Cracknell; Richard H. Clark

2009-01-01T23:59:59.000Z

338

Miscibility of blends of poly(methyl methacrylate) and oligodiols based on a bisphenol A nucleus and ethylene oxide or propylene oxide branches  

E-Print Network (OSTI)

Cloud-point curves of blends of poly(methyl methacrylate) (PMMA) with a series of oligodiols based on a bisphenol A nucleus and short branches of poly(ethylene oxide) or poly(propylene oxide) (BPA-EO or BPA-PO), and with PEO and PPO oligomers, were obtained using a light transmission device. Experimental results were fitted with the Flory- Huggins model using an interaction parameter depending on both temperature and composition. For PMMA/PEO and PMMA/PPO blends, the miscibility increased when increasing the size of the diol, due to the significant decrease in the entropic and enthalpic terms contributing to the interaction parameter. This reflected the decrease in the selfassociation of solvent molecules and in the contribution of terminal OH groups to the mismatching of solubility parameters. For PMMA/BPA-EO blends, a decrease of the entropic contribution to the interaction parameter when increasing the size of the oligodiol was also found. However, the effect was counterbalanced by the opposite contribution of combinatorial terms leading to cloud-point curves located in approximately the same temperature range. For PMMA/BPA-PO blends, the interaction parameter exhibited a very low value. In this case, the effect of solvent size was much more important on combinatorial terms than on the interaction parameter, leading to an increase in miscibility when decreasing the oligodiol size. For short BPA-PO oligodiols no phase separation was observed. The entropic contribution of the interaction parameter exhibited an inverse relationship with the size of the oligodiols, independent of the nature of the chains bearing the hydroxyls and the type of OH groups (primary or secondary). This indicates that the degree of self-association of solvent molecules through their OH terminal groups, was mainly determined by their relative sizes.

B. Jaffrennou; E. R. Soule; F. Mechin; J. Borrajo; J. P. Pascault; R. J. J. Williams

2013-11-21T23:59:59.000Z

339

Acute effects of a sarin-like organophosphorus agent, bis(isopropyl methyl)phosphonate, on cardiovascular parameters in anaesthetized, artificially ventilated rats  

SciTech Connect

The organophosphorus compound sarin irreversibly inhibits acetylcholinesterase. We examined the acute cardiovascular effects of a sarin-like organophosphorus agent, bis(isopropyl methyl)phosphonate (BIMP), in anaesthetized, artificially ventilated rats. Intravenous administration of BIMP (0.8 mg/kg; the LD50 value) induced a long-lasting increase in blood pressure and tended to increase heart rate. In rats pretreated with the non-selective muscarinic-receptor antagonist atropine, BIMP significantly increased both heart rate and blood pressure. In atropine-treated rats, hexamethonium (antagonist of ganglionic nicotinic receptors) greatly attenuated the BIMP-induced increase in blood pressure without changing the BIMP-induced increase in heart rate. In rats treated with atropine plus hexamethonium, intravenous phentolamine (non-selective ?-adrenergic receptor antagonist) plus propranolol (non-selective ?-adrenergic receptor antagonist) completely blocked the BIMP-induced increases in blood pressure and heart rate. In atropine-treated rats, the reversible acetylcholinesterase inhibitor neostigmine (1 mg/kg) induced a transient increase in blood pressure, but had no effect on heart rate. These results suggest that in anaesthetized rats, BIMP induces powerful stimulation of sympathetic as well as parasympathetic nerves and thereby modulates heart rate and blood pressure. They may also indicate that an action independent of acetylcholinesterase inhibition contributes to the acute cardiovascular responses induced by BIMP. - Highlights: • A sarin-like agent BIMP markedly increased blood pressure in anaesthetized rats. • Muscarinic receptor blockade enhanced the BIMP-induced increase in blood pressure. • Ganglionic nicotinic receptor blockade attenuated the BIMP-induced response. • Blockade of ?- as well as ?-receptors attenuated the BIMP-induced response.

Watanabe, Yoshimasa [Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University, Nagoya (Japan); Itoh, Takeo, E-mail: titoh@med.nagoya-cu.ac.jp [Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University, Nagoya (Japan); Shiraishi, Hiroaki [Department of Forensic Medicine, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima (Japan); Maeno, Yoshitaka [Department of Forensic Medical Science, Graduate School of Medical Sciences, Nagoya City University, Nagoya (Japan); Arima, Yosuke; Torikoshi, Aiko; Namera, Akira [Department of Forensic Medicine, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima (Japan); Makita, Ryosuke [Department of Nursing, Faculty of Health Sciences, Hiroshima Cosmopolitan University, Hiroshima (Japan); Yoshizumi, Masao [Department of Cardiovascular Physiology and Medicine, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima (Japan); Nagao, Masataka [Department of Forensic Medicine, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima (Japan)

2013-10-01T23:59:59.000Z

340

Process for tertiary oil recovery using tall oil pitch  

DOE Patents (OSTI)

A process and compositions for enhancing the recovery of acid crudes are disclosed. The process involves injecting caustic solutions into the reservoir to maintain a pH of 11 to 13. The fluid contains an effective amount of multivalent cation for inhibiting alkaline silica dissolution with the reservoir. A tall oil pitch soap is added as a polymeric mobility control agent. (DMC)

Radke, C.J.

1983-07-25T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

The Existence of Man in the Tertiary Epoch  

Science Journals Connector (OSTI)

... IN the Bibliothčque Universelle et Revue Suisse for the 15 th February, M. Favre, in an article ...

1870-04-07T23:59:59.000Z

342

Cosolvent-induced transformation of a death domain tertiary structure  

Science Journals Connector (OSTI)

...Density modification using SOLOMON (17) increased the figure of merit from 0.70 to 0.82 at 2.7-a resolution. A...S. W. ( 1993 ) Proteins 17,75 -86. 8234246 We thank Nick Pace for a critical reading of the manuscript, A. Loew, D...

Tsan Xiao; Kevin H. Gardner; Stephen R. Sprang

2002-01-01T23:59:59.000Z

343

THE EARLY TERTIARY VOLCAINOES OF THE ABSAROKA RANGE  

Science Journals Connector (OSTI)

...interbedded breecias pass into sheets, and later again assume the...varied modifications of eruptive energy, a bold stock, Clouds Home...examples of a massive interbedded sheet extends for a mile or more along...Beyond this point eruptive energy gradually dies out, and is...

Arnold Hague

1899-03-24T23:59:59.000Z

344

Freezing-induced perturbation of tertiary structure of monoclonal antibody  

E-Print Network (OSTI)

-30 -20 -10 0 10 20 Temperature (C) E m i ssi o n p eak p o s i t i o n ( n m) IgG+KCl Pre-frozen 20C Frozen -30C Post-thawed 20C Peak shift due to freez- ing pH8 338.4 ? 0.1 nm 338.7 ? 0.0 nm 338.0 ? 0.1 nm 0.3 nm pH3 340.7 ? 0.5 nm...

Liu, Lu; Kueltzo, L. A.; Jones, L. S.; Carpenter, J. F.

2006-10-25T23:59:59.000Z

345

Low Barrier Hydrogen Bonds in Acyclic Tertiary Diamines  

E-Print Network (OSTI)

B: synthesis of diamide with phosphorous pentoxide, and C:synthesis uses phosphorous pentoxide and dimethylformamide (B: synthesis of diamide with phosphorous pentoxide, and C:

Khodagholian, Sevana

2010-01-01T23:59:59.000Z

346

Graphene composite for improvement in the conversion efficiency of flexible poly 3-hexyl-thiophene:[6,6]-phenyl C{sub 71} butyric acid methyl ester polymer solar cells  

SciTech Connect

The solution of thin graphene-sheets obtained from a simple ultrasonic exfoliation process was found to chemically interact with [6,6]-phenyl C{sub 71} butyric acid methyl ester (PCBM) molecules. The thinner graphene-sheets have significantly altered the positions of highest occupied molecular orbital and lowest unoccupied molecular orbital of PCBM, which is beneficial for the enhancement of the open circuit voltage of the solar cells. Flexible bulk heterojunction solar cells fabricated using poly 3-hexylthiophene (P3HT):PCBM-graphene exhibited a power conversion efficiency of 2.51%, which is a ?2-fold increase as compared to those fabricated using P3HT:PCBM. Inclusion of graphene-sheets not only improved the open-circuit voltage but also enhanced the short-circuit current density owing to an improved electron transport.

Chauhan, A. K., E-mail: akchau@barc.gov.in, E-mail: akc.barc@gmail.com; Gusain, Abhay; Jha, P.; Koiry, S. P.; Saxena, Vibha; Veerender, P.; Aswal, D. K.; Gupta, S. K. [Technical Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085 (India)

2014-03-31T23:59:59.000Z

347

Ozone-forming potential of a series of oxygenated organic compounds  

SciTech Connect

An incremental reactivity approach has been used to assess the relative ozone-forming potentials of various important oxygenated fuels/fuel additives, i.e., tert-butyl alcohol (TBA), dimethyl ether (DME), diethyl ether (DEE), methyl tert-butyl ether (MTBE), and ethyl tert-butyl ether (ETBE), in a variety of environments. Calculations were performed using a single-cell trajectory model, combined with the Lurmann-Carter-Coyner chemical mechanism, with (NMOC)/(NO{sub x}) ratios ranging from 4 to 20. This work provides the first quantitative assessment of the air quality impact of release of these important oxygenated compounds. ETBE and DEE are the two most reactive compounds on a per carbon equivalent basis, while TBA is the least reactive species. At a (NMOC)/(NO{sub x}) ratio of 8, which is generally typical of polluted urban areas in the United States, TBA, DME, MTBE, and ETBE all have incremental reactivities less than or equal to that of the urban NMHC mix. Thus, use of these additives in fuels may have a beneficial impact on urban ozone levels.

Japar, S.M.; Wallington, T.J.; Rudy, S.J.; Chang, Tai Y. (Ford Motor Company, Dearborn, MI (USA))

1991-03-01T23:59:59.000Z

348

Advanced quadrupole ion trap instrumentation for low level vehicle emissions measurements. CRADA final report for number ORNL93-0238  

SciTech Connect

Quadrupole ion trap mass spectrometry has been evaluated for its potential use in vehicle emissions measurements in vehicle test facilities as an analyzer for the top 15 compounds contributing to smog generation. A variety of ionization methods were explored including ion trap in situ chemical ionization, atmospheric sampling glow discharge ionization, and nitric oxide chemical ionization in a glow discharge ionization source coupled with anion trap mass spectrometer. Emphasis was placed on the determination of hydrocarbons and oxygenated hydrocarbons at parts per million to parts per billion levels. Ion trap in situ water chemical ionization and atmospheric sampling glow discharge ionization were both shown to be amenable to the analysis of arenes, alcohols, aldehydes and, to some degree, alkenes. Atmospheric sampling glow discharge also generated molecular ions of methyl-t-butyl ether (MTBE). Neither of these ionization methods, however, were found to generate diagnostic ions for the alkanes. Nitric oxide chemical ionization, on the other hand, was found to yield diagnostic ions for alkanes, alkenes, arenes, alcohols, aldehydes, and MTBE. The ability to measure a variety of hydrocarbons present at roughly 15 parts per billion at measurement rates of 3 Hz was demonstrated. These results have demonstrated that the ion trap has an excellent combination of sensitivity, specificity, speed, and flexibility with respect to the technical requirements of the top 15 analyzer.

McLuckey, S.A.; Buchanan, M.V.; Asano, K.G.; Hart, K.J.; Goeringer, D.E. [Oak Ridge National Lab., TN (United States); Dearth, M.A. [Ford Motor Co., Dearborn, MI (United States). Environmental Research Consortium

1997-09-01T23:59:59.000Z

349

Vehicle Technologies Office: Fact #264: April 21, 2003 Production of  

NLE Websites -- All DOE Office Websites (Extended Search)

4: April 21, 4: April 21, 2003 Production of Ethanol and MTBE to someone by E-mail Share Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on Facebook Tweet about Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on Twitter Bookmark Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on Google Bookmark Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on Delicious Rank Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on Digg Find More places to share Vehicle Technologies Office: Fact #264: April 21, 2003 Production of Ethanol and MTBE on AddThis.com... Fact #264: April 21, 2003 Production of Ethanol and MTBE

350

Cometabolic bioremediation  

E-Print Network (OSTI)

contaminants, e.g. PCE, TCE, MTBE, TNT, dioxane, atrazine,Geobacter, Clavibacter) BTEX, PCE, PAHs, Pyrene, Atrazine,VC, 1,1-DCE, 1,1,1- TCA, MTBE PCE, TCE, DCE, VC, Hexachloro-

Hazen, Terry C.

2010-01-01T23:59:59.000Z

351

Economics of Lifecycle analysis and greenhouse gas regulations  

E-Print Network (OSTI)

namely, the hike in crude oil prices, replacement of MTBE bygrowth in demand. Crude oil import price is expected to

Rajagopal, Deepak

2009-01-01T23:59:59.000Z

352

Exact analysis of polycrystalline electron spin echo envelope modulation including mutual nuclear arrangements and quadrupole interactions and its application to methyl radicals in irradiated crystals of lithium acetate dihydrate  

Science Journals Connector (OSTI)

The method of exact analysis including mutual nuclear arrangements and quadrupole interactions is developed for electron spin echo envelope modulation (ESEM) from polycrystalline samples using the formulation in an arbitrary laboratory coordinate system which makes it possible to perform an exact angular integration. In order to assess polycrystalline ESEM by comparing with electron nuclear double resonance(ENDOR) data the method is applied to analyze deuterium hyperfine modulation on the two?pulse electron spin echo (ESE) envelope decay observed for methyl radicals radiolytically produced in CD3COOLi???2H2O and CH3COOLi???2D2O. The results are totally consistent with our previous study by single crystal1H ENDOR. Through this application importance of the nuclear quadrupole term is also shown based on the exact method. The rigid deuterons in the water of crystallization show a marked quadrupole effect as compared with those in the freely rotating CD3 group. The contributions from the distant nuclei to the modulation pattern are also studied by the exact method using the crystallographic data. We have further clarified that the origin of the disagreement of a previous Li ESEM with our ENDOR is mainly in the use of a unit spin density on the spin probe despite its reduction by delocalization to the environment.

Machio Iwasaki; Kazumi Toriyama

1985-01-01T23:59:59.000Z

353

Why sequence ethene and vinyl chloride-oxidizing Mycobacterium strains?  

NLE Websites -- All DOE Office Websites (Extended Search)

sequence ethene and vinyl sequence ethene and vinyl chloride-oxidizing Mycobacterium strains? Mycobacteria are known for causing human and animal diseases but they are also important degraders of hard-to-break-down water contaminants such as polyaromatic hydrocarbons (PAHs) and methyl tert-butyl ether (MTBE). So far the handful of bacterial species representing the Mycobacterium genus that have been sequenced all break down PAHs. In this project, researchers focus on the genomes of mycobacterial species isolated from soil, freshwater and marine environments that use the alkene compounds ethene and vinyl chloride as carbon sources. Chlorinated ethene compounds are difficult to remove from contaminated groundwater but necessary because of their toxicity. Additionally these compounds reduce the ozone levels in the atmosphere.

354

A STUDY OF FUNDAMENTAL REACTION PATHWAYS FOR TRANSITION METAL ALKYL COMPLEXES. I. THE REACTION OF A NICKEL METHYL COMPLEX WITH ALKYNES. II. THE MECHANISM OF ALDEHYDE FORMATION IN THE REACTION OF A MOLYBDENUM HYDRIDE WITH MOLYBDENUM ALKYLS  

SciTech Connect

I. This study reports the rapid reaction under mild conditions of internal or terminal alkynes with methyl (acetyl~ acetonato) (triphenylphosphine) nickel (1) in either aromatic or ether solvents. In all cases vinylnickel products 2 are formed by insertion of the alkyne into the nickel=methyl bond. These complexes may be converted into a variety of organic products (e.g. alkenes, esters, vinyl halides) by treatment with appropriate reagents. Unsymmetrical alkynes give selectively the one regioisomer with the sterically largest substituent next to the nickel atom. In order to investigate the stereochemistry of the initial insertion, a x-ray diffraction study of the reaction of 1 with diphenylacetylene was carried out. This showed that the vinylnickel complex formed by overall trans insertion was the product of the reaction. Furthermore, subsequent slow isomerization of this complex, to a mixture of it and the corresponding cis isomer, demonstrated that this trans addition product is the kinetic product of the reaction. In studies with other alkynes, the product of trans addition was not always exclusively (or even predominantly) formed, but the ratio of the stereoisomers formed kinetically was substantially different from the thermodynamic ratio. Isotope labeling, added phosphine, and other experiments have allowed us to conclude that the mechanism of this reaction does involve initial cis addition. However, a coordinatively unsaturated vinylnickel complex is initially formed which can undergo rapid, phosphine-catalyzed cis-trans isomerization in competition with its conversion to the isolable phosphine-substituted kinetic reaction products. II. The reaction of CpMo(CO){sub 3}H (1a) with CpMo(CO){sub 3}R (2, R= CH{sub 3}, C{sub 2}H{sub 5}) at 50{degrees} C in THF gives the aldehyde RCHO and the dimers [CpMo(CO){sub 3}]{sub 2} (3a) and [CpMo(CO){sub 2}]{sub 2} (4a). Labeling one of the reactants with a methylcyclopentadienyl ligand it was possible to show that the mixed dimers MeCpMo(CO){sub 3}-(CO){sub 3}MoCp (3b) and MeCpMo(CO){sub 2}{triple_bond}(CO){sub 2}MoCp (4b) are the predominant kinetic products of the reaction. Additionally labeling the carbonyl ligands of 1a with {sup 13}CO led to the conclusion that all three of the carbonyl ligands in 1a end up in the tetracarbonyl dimers 4a if the reaction is carried out under a continuous purge of argon Trapping studies failed to find any evidence for the intermediacy of either [CpMo(CO){sub 3}]{sup -} or [CpMo(CO){sub 3}]{sup +} in this reaction. A mechanism is proposed that involves the initial migration of the alkyl ligand in 2 to CO forming an unsaturated acyl complex which reacts with 1a to give a binuclear complex containing a three center-two electron Mo-H-Mo bond. This complex then selectively looses a carbonyl from the acyl molybdenum, migrates the hydride to that same metal, and forms a metal-metal bond. This binuclear complex with the hydride and acyl ligands on one metal reductively eliminates aldehyde, and migrates a carbonyl ligand, to give 4a directly. The other product 3a is formed by addition of two molecules of free CO to 4a.

Huggins, John Mitchell

1980-06-01T23:59:59.000Z

355

Counter-anion role in the formation of two supra­molecular complexes: [Ag2(DPP)2](ClO4)2?CH3CN and [Ag2(DPP)2(NO3)2] {DPP is N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine}  

Science Journals Connector (OSTI)

In the Ag complex of N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine (DPP) with perchlorate, the unique Ag+ cation has a near-linear coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands. In the analogous complex with nitrate, the nitrate anions weakly chelate to each Ag+ cation, leading to each Ag+ cation having a distorted tetra­hedral coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands, and two chelating nitrate O atoms.

Liang, G.-M.

2014-03-25T23:59:59.000Z

356

Molecular Cell Methylation of a Histone Mimic  

E-Print Network (OSTI)

,3 Andrew N. Krutchinsky,2 Ingrid Mecklenbra¨ uker,1 Agnes Viale,5 Eugene Rudensky,1 Ming-Ming Zhou,4., 2004; Huang et al., 2006; Kouskouti et al., 2004; Zhang et al., 2005). In contrast, little progr

Chait, Brian T.

357

Phytoremediation of Ionic and Methyl Mercury P  

SciTech Connect

Our long-term goal is to enable highly productive plant species to extract, resist, detoxify, and/or sequester toxic heavy metal pollutants as an environmentally friendly alternative to physical remediation methods. We have focused this phytoremediation research on soil and water-borne ionic and methylmercury. Mercury pollution is a serious world-wide problem affecting the health of human and wild-life populations. Methylmercury, produced by native bacteria at mercury-contaminated wetland sites, is a particularly serious problem due to its extreme toxicity and efficient biomagnification in the food chain. We engineered several plant species (e.g., Arabidopsis, tobacco, canola, yellow poplar, rice) to express the bacterial genes, merB and/or merA, under the control of plant regulatory sequences. These transgenic plants acquired remarkable properties for mercury remediation. (1) Transgenic plants expressing merB (organomercury lyase) extract methylmercury from their growth substrate and degrade it to less toxic ionic mercury. They grow on concentrations of methylmercury that kill normal plants and accumulate low levels of ionic mercury. (2) Transgenic plants expressing merA (mercuric ion reductase) extract and electrochemically reduce toxic, reactive ionic mercury to much less toxic and volatile metallic mercury. This metal transformation is driven by the powerful photosynthetic reducing capacity of higher plants that generates excess NADPH using solar energy. MerA plants grow vigorously on levels of ionic mercury that kill control plants. Plants expressing both merB and merA degrade high levels of methylmercury and volatilize metallic mercury. These properties were shown to be genetically stable for several generations in the two plant species examined. Our work demonstrates that native trees, shrubs, and grasses can be engineered to remediate the most abundant toxic mercury pollutants. Building on these data our working hypothesis for the next grant period is that transgenic plants expressing the bacterial merB and merA genes will (a) remove mercury from polluted soil and water and (b) prevent methylmercury from entering the food chain. Our specific aims center on understanding the mechanisms by which plants process the various forms of mercury and volatilize or transpire mercury vapor. This information will allow us to improve the design of our current phytoremediation strategies. As an alternative to volatilizing mercury, we are using several new genes to construct plants that will hyperaccumulate mercury in above-ground tissues for later harvest. The Department of Energy's Oak Ridge National Laboratory and Brookhaven National Laboratory have sites with significant levels of mercury contamination that could be cleaned by applying the scientific discoveries and new phytoremediation technologies described in this proposal. The knowledge and expertise gained by engineering plants to hyperaccumulate mercury can be applied to the remediation of other heavy metals pollutants (e.g., arsenic, cesium, cadmium, chromium, lead, strontium, technetium, uranium) found at several DOE facilities.

Meagher, Richard B.

1999-06-01T23:59:59.000Z

358

Conformation-Selective Methylation of Geminivirus DNA  

Science Journals Connector (OSTI)

...X15984) (22) were inoculated into the experimental host Nicotiana benthamiana Domin and grown in a greenhouse with supplementary lighting or in a climate chamber as described previously (81), under containment according to gene technology...

T. Paprotka; K. Deuschle; V. Metzler; H. Jeske

2011-08-10T23:59:59.000Z

359

A fivefold inter­penetrating diamond­oid three-dimensional metal-organic framework constructed from benzene-1,4-di­acetic acid and flexible triazole derivatives: poly[[(2-benzene-1,4-di­acetato-2O:O){2-1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene-2N4:N4'}zinc(II)] monohydrate  

Science Journals Connector (OSTI)

The title compound has a fivefold inter­penetrating diamondoid three-dimensional metal-organic framework, with each ZnII centre surrounded by two O-donor atoms from monodentate carboxyl­ate groups belonging to two different benzene-1,4-di­acetate ligands and by two triazole N-donor atoms from two different 1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene ligands.

Shen, H.

2013-12-14T23:59:59.000Z

360

Green Solvents for Polymerization of Methyl Methacrylate to Poly(Methyl Methacrylate)  

Science Journals Connector (OSTI)

Solvents are often volatile organic compounds (VOCs) ... decade, chemistry research into the use of greener, alternative solvents has been grown enormously. Alternative solvents suitable for green chemistry are t...

S. Krishna Mohan

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Formation of Methyl Nitrite and Methyl Nitrate during Plasma Treatment of Diesel Exhaust  

Science Journals Connector (OSTI)

FTIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled ...

T. J. Wallington; J. W. Hoard; M. P. Sulbaek Andersen; M. D. Hurley; Y. Nakano; M. Kawasaki

2003-08-08T23:59:59.000Z

362

The Role of the Ocean in the Atmospheric Budgets of Methyl Bromide, Methyl Chloride and Methane  

E-Print Network (OSTI)

of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Shari A. Yvon-Lewis Committee Members, John D. Kessler Robert Rhew Gunnar W. Schade... to work with her. I would like to thank my committee members, Drs. John D. Kessler, Robert Rhew and Gunnar W. Schade. I went to two cruises with John and coauthored several papers with him. He gave me a lot of help and inspiration for methane study. He...

Hu, Lei

2012-10-19T23:59:59.000Z

363

Identification of Differentially Methylated Sequences in Colorectal Cancer by Methylated CpG Island Amplification  

Science Journals Connector (OSTI)

...genotype of each panel was determined. Linkage analysis was performed using the RH server of Stanford University (http://www-shgc.stanford.edu/RH/index.html). PCR primer sequences used to amplify each clone are available upon request. RT-PCR...

Minoru Toyota; Coty Ho; Nita Ahuja; Kam-Wing Jair; Qing Li; Mutsumi Ohe-Toyota; Stephen B. Baylin; Jean-Pierre J. Issa

1999-05-15T23:59:59.000Z

364

NAME/TEAM: ______________________________________ FTIR postlab -1  

E-Print Network (OSTI)

in gasoline v/v % ethanol in vodka v/v % ethanol in mouthwash 2) Based on your results, what is the proof your value % RE 100 lit. value - = ďż˝ 4) Convert your v/v % MTBE in gasoline to units of mass % (w/w %) of oxygen in gasoline. Density of MTBE = 0.74 g/mL, Density of gasoline = 0.66 g/mL, Molar Mass of MTBE = 88

Nizkorodov, Sergey

365

TERTIARY AND QUATERNARY GEOLOGY OF THE LOWER RIO PUERCO AREA, NEW MEXICO  

Science Journals Connector (OSTI)

...hogbacks east of Lucero Mesa, where resistant...fig. 2). The Chupadera formation may be...backs east of Lucero Mesa, and most of the...Andres member of the Chupadera formation consists...Santa Fe time the Chupadera was exposed in the...the lava-capped mesas and the alluvium...

366

Early Tertiary Age of Pitchstone in the Northern Black Hills, South Dakota  

Science Journals Connector (OSTI)

...the glass is isotropic but has tiny anisotropic particles. Some of these particles are...offossil-iferous Upper Cretaceous Carlile shale. The Carlile is about 1100 m stratigraphi-cally...xiii). Drake supposed that the Carlile shale fragments had been acquired from steep...

JACK A. REDDEN; JOHN D. OBRADOVICH; CHARLES W. NAESER; ROBERT E. ZARTMAN; JAMES J. NORTON

1983-06-10T23:59:59.000Z

367

Micropaleontology and mineralogy of a tertiary sediment core from the Sigsbee knolls, Gulf of Mexico  

E-Print Network (OSTI)

PLATES ~ ~ o ~ a ~ o ~ e e ~ o o a a ~ ~ o ~ 91 LIST OF FIQEES Figure Page 1 Physiographic provinces of the Western Gulf of Mexico showing location of the Sigsbee knolls. . . . . 16 2 Bathymetry of the Sigsbee knolls ~ e o a a e a o ~ o ~ 18 3 X..., size analyses, and water content . 14 2 Distribution of calcareous nannoplankton in core 64& 9 SE e ~ o o e o o o o o ~ o e a a o ~ e o o e ~ ~ 35 3 Interpretation of X-ray diffractogoams ~ . . ~. . . . 50 LIST OF PLATES Plate 1 Ihotognaph of core...

Pyle, Thomas Edward

2012-06-07T23:59:59.000Z

368

Palaeomagnetism and radiometric dating of the British Tertiary Igneous Province: Muck and Eigg  

Science Journals Connector (OSTI)

......Vaternish dyke swarm on North Skye, Scotland, Geophys...sediments on the shore of Camas Mor in Muck and Cretaceous...M O R G A B B R O The Camas Mdr Gabbro was sampled...1 for locations). North Cliffs Cleadale- Laig...lava succession, at the north of Eigg, has an age spectrum......

P. Dagley; A. E. Mussett

1986-04-01T23:59:59.000Z

369

Monitoring Electricity Consumption in the Tertiary Sector- A Project within the Intelligent Energy Europe Program  

E-Print Network (OSTI)

Services and Energydesign, Technical University of Braunschweig, Germany Univ.-Prof. Dr.-Ing. M. Norbert Fisch Head of Institute IGS ? Institute of Building Services and Energydesign, Technical University of Braunschweig, Germany Edelgard Gruber... Competence Centre Energy Policy and Energy Systems, Fraunhofer Institute for Systems and Innovation Research, Karlsruhe, Germany Barbara Schlomann Competence Centre Energy Policy and Energy Systems, Fraunhofer Institute for Systems and Innovation...

Plesser, S.; Fisch, M. N.; Gruber, E.; Schlomann, B.

370

Mineralogy and diagenesis of Gulf Coast Tertiary shales Ann-Mag Field, Brooks County, Texas  

E-Print Network (OSTI)

basins containing sediments of the same age (Bruce, 19S4). Shale dehydration and subsequent fluid movement has also been proposed as a mechanism to redistribute ions and form cements ( Towe, 1962; Boles and pranks, 1979) and authi genic minerals... composition with increasing depth of burial provides evidence of systematic diagenetic conversions (Boles and Franks, 1979; Hower et al. , 1976; Perry and Hower, 1972; Weaver and Beck, 1971; Dunoyer De Segonzac, 1970; Burst, 1969; Powers, 1967). When...

Bott, Winston Frederick

1985-01-01T23:59:59.000Z

371

40Ar/39Ar Age of Cretaceous-Tertiary Boundary Tektites from Haiti  

Science Journals Connector (OSTI)

...90G15K obtained with laser system and for...ultrason-ically in dilute HF (-5%) for removal...size for total-fusion and incremental-heating...We determined laser total fusion 'Ar/ 39Ar ages...mean of the four laser-fusion plateau ages at...

G. A. IZETT; G. B. DALRYMPLE; L. W. SNEE

1991-06-14T23:59:59.000Z

372

The effect of solids retention time on tertiary ozonation and carbon adsorption of petrochemical wastewaters  

E-Print Network (OSTI)

and biochemical oxygen demands were measured before and after ozaontion as well as the amount of ozone consumed. Non-adsorbable COD was measured and a comparison of ozonized and unozonized wastewater made. BOD concentration rose after ozonation, but decreased... of solids retention time on nonadsorbable COD, with and without ozonation. 39 LIST OF TABLES Table Page Biochemical and chemical oxygen demand data. COD removal and ozone consumption data 21 26 iVon-adsorbable COD data for bio-oxidized effluent. . 3O...

Buys, Ronald Earl

2012-06-07T23:59:59.000Z

373

Yoon et al. 1 Research Article: Tertiary Endosymbiosis Driven Genome Evolution in  

E-Print Network (OSTI)

apoprotein; PsbD, photosystem II D2 reaction center protein; PsbO, oxygen-evolving enhancer protein 1 MBE, 2 and Debashish Bhattacharya 1 * 1 Department of Biological Sciences and Roy J. Carver Center, NOAA National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research

Bhattacharya, Debashish

374

Calcareous nannofossils from the uppermost Cretaceous and the lowermost Tertiary of central Texas  

E-Print Network (OSTI)

noflagellates, successively dominate the nanno- fossil assemblage immed1ately above the boundary. The opportunistic of small placolith species, such as Cruci lacolithus sp. cf. C. primus, C ocl la 11th p I, else t p. f. I!. ~di h d T wef s p tat, hl h t lty... yl ld t p dly I I s m I Pal o nannoflora. This boundary succession is nearly ident1cal to the boundary succession documented in detail 1n Spain and 1s most reasonably inter- preted as representing a continuous sect1on because there is no ev1dence...

Jiang, Ming-Jung

2012-06-07T23:59:59.000Z

375

An investigation into student academic help seeking behaviours in a tertiary institution's learning support centre.  

E-Print Network (OSTI)

??The majority of academic help seeking studies worldwide have predominantly used the quantitative paradigm and have been undertaken in the secondary and primary sector. This… (more)

Protheroe, Mervyn

2009-01-01T23:59:59.000Z

376

Late Tertiary/Quaternary volcanics of southern Costa Rica and northern Panama  

SciTech Connect

The recent tectonic evolution of the Isthmus of Panama is marked by a complexity imparted by a subduction zone - magmatic arc, a transform plate boundary, and the attempted subduction of an aseismic ridge. In northern Panama andesites form the morphologically young Chiriqui stratovolcano, while in southern Costa Rica they are found interbedded with thick lahars. Two groups of andesites occur in the region. One is low in Si and K (Group I); the other high in Si and K (Group II). The Panamanian andesites belong to both the groups, while Costa Rican andesites are restricted to Group II. Group I andesites are glassy, plagioclase-phyric (An45 rims), and contain abundant augite (Wo46En46Fs8) and magnetite. Rare, resorbed olivine (Fo82) and amphibole are occasionally observed. The Group II andesites have similar mineralogy but also contain abundant pargasitic hornblende and minor orthopyroxene or pigeonite. Xenoliths are common in the Group II andesites of Chiriqui Volcano. Two types of xenoliths are recognized. Cumulate-textured, hornblende gabbro xenoliths vary from nearly pure plagioclase to nearly pure amphibole. These gabbroic xenoliths contain plagioclase (An90 cores to An53 rims), augite, and pargasitic hornblende often displaying the same reaction products as found in the andesites. These xenoliths are interpreted as cognate. These andesites are all characterized by high alkalis and alkali earths; Group II have over 1500 ppm Ba and 1000 ppm Sr. They are apparently produced by partial melting of a highly metasomatised mantle followed by high-pressure fractionation dominated by hornblende.

Roy, A.; Byerly, G.R.

1985-01-01T23:59:59.000Z

377

1208 Organometallics1988,7,1208-1213 Copper(I) Alkyls. Synthesis and Characterization of Tertiary  

E-Print Network (OSTI)

-Champaign, Urbana, Illinois 61801 Received December 28. 1986 Alkylation of copper(I1)acetate reflections and 62 variables. Introduction Lithium dialkylcuprates, LiCuR2,are used extensively in organic

Girolami, Gregory S.

378

Application of a moving bed biofilm reactor for tertiary ammonia treatment in high temperature industrial wastewater  

E-Print Network (OSTI)

industrial wastewater Jennifer L. Shore a,b , William S. M'Coy b , Claudia K. Gunsch a , Marc A. Deshusses a 2012 Available online 17 February 2012 Keywords: Moving bed biofilm reactor Industrial wastewater and industrial wastewater. No biotreatment was observed at 45 °C, although effective nitrification was rapidly

379

Palaeobotanical evidence for a June 'impact winter' at the Cretaceous/Tertiary boundary  

Science Journals Connector (OSTI)

... , well preserved palynomorphs, 91% of which are one type of fern spore. Near Teapot Dome, 100 km west of the Dogie Creek site, the fern spike also occurs ... has physical evidence of early fallout from bolide impact. But detailed palaeobotanical analysis of the Teapot Dome section (Fig. 2), which is the only western interior section that preserves ...

Jack A. Wolfe

1991-08-01T23:59:59.000Z

380

Petrophysical and sedimentological evaluation of the Tertiary sandstones of Barua-Motatan, Eastern Zulia  

SciTech Connect

The combined application of conventional well logs such as resistivity, gamma ray, neutron density and sonic, and specialized logs such as acoustic image and analysis of fluid and rotary coring tool samples are excellent means of evaluating reservoir rock quality, fluid saturations, and hole conditions. This paper describes the application of such a technique and presents the results thereof of reservoir characterization as applied to an exploration well PAA-1X in the eastern coast of the Maracaibo Lake, Venezuela. The PAA-1X well was drilled on the flank of a monocline west of Mene Grande fault near the border of Mene Grande field to explore the Misca Formation of Eocene age. Intermediate and Basal Pauji sandstones were not present in PAA-1X well, contrary to our expectations. The similarity of well logs and geological columns with an earlier exploration well, Tom-3X, confirmed this finding. The sandstones are medium to fine grained, with porosities of 5-21% and permeabilities of 0.02-0.8 md. The acoustic image log shows an ovalness of the hole, a characteristic typical of silty and shaly formations. The interpretation with the aforementioned tools indicates that the exploratory well has very few thin productive intervals and is therefore likely to be deemed uneconomic. This is corroborated by the DST of the upper part of the Misoa Formation that produced only water. The study does indicate that this set of tools can be used very effectively in an integrated manner to accurately assess and evaluate prospects.

Carmona, R.; Mederos, S. [Maraven S.A., Caracas (Venezuela)

1996-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

E-Print Network 3.0 - african tertiary institution Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Medicine 3 GRADUATE STUDY IN AFRICAN AND AFRICAN-AMERICAN STUDIES "...We are where Africa, Summary: GRADUATE STUDY IN AFRICAN AND AFRICAN-AMERICAN STUDIES "...We are where...

382

E-Print Network 3.0 - african tertiary teaching Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Medicine 2 GRADUATE STUDY IN AFRICAN AND AFRICAN-AMERICAN STUDIES "...We are where Africa, Summary: :www.ku.eduafs. MeganMcAteeKUUniversityRelations Professor Elizabeth...

383

Late Tertiary paleomagnetic data from Leyte, Philippines: implications for Philippine fault zone motion  

E-Print Network (OSTI)

= 20. 1' (oss ? 6. 6', le ? 29. 9) and a paleomagnetic pole A ? 89. 0" N, P ? 10. 4'E (Ass ? 4. 8', K ? 55. 3). Eight early Neogene sites (3 normal polarity and 5 reversed polarity) give a mean direction D = 23. 2', I = 13. 9' (oss ? 9. 3', k = 36.... 2) and a paleomagnetic pole A = 66. 5'N, 6 = 220. 5'E (Ass ? 7. 1', It = 62. 0). The late Veogene pole is indistinguishable at the 95% confidence level from published Plio-Pleistocene poles from the entire Philippines and the late Miocene pole...

Cole, Jay Timothy

1988-01-01T23:59:59.000Z

384

Hydrogeologic characterization of the cretaceous-tertiary Coastal Plain sequence at the Savannah River Site  

SciTech Connect

Several hydrostratigraphic classification schemes have been devised to describe the hydrogeology at the Savannah River Site SRS. Central to these schemes is the one-to-one fixed relationship between the hydrostratigraphic units and the lithostratigraphic units currently favored for the Site. This fixed relationship has proven difficult to apply in studies of widely separated locations at the Site due to the various facies observed in the updip Coastal Plain sequence. A detailed analysis and synthesis of the geophysical, core, and hydrologic data available from more than 164 deep wells from 23 cluster locations both on the Site and in the surrounding region was conducted to provide the basis for a hydrostratigraphic classification scheme which could be applied to the entire SRS region. As a result, an interim hydrostratigraphic classification was developed that defines the regional hydrogeologic characteristics of the aquifers underlying the Site (Aadland et al., 1990). The hydrostratigraphic code accounts for and accommodates the rapid lateral variation in lithofacies observed in the region, and eliminates all formal'' connection between the hydrostratigraphic nomenclature and the lithostratigraphic nomenclature. The code is robust and can be made as detailed as is needed to characterize the aquifer units and aquifer zones described in Site-specific studies. 15 refs., 2 figs.

Aadland, R.K.

1990-01-01T23:59:59.000Z

385

E-Print Network 3.0 - antiknock ratings Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

etryandgaschromatography-thermal conductivity techniques. A rate law is developed for the removal of MTBE from an aqueous solution in the DMP... reactor. Rate constants are also...

386

Total  

U.S. Energy Information Administration (EIA) Indexed Site

Normal ButaneButylene Other Liquids Oxygenates Fuel Ethanol MTBE Other Oxygenates Biomass-based Diesel Other Renewable Diesel Fuel Other Renewable Fuels Gasoline Blending...

387

Total  

U.S. Energy Information Administration (EIA) Indexed Site

Normal ButaneButylene Other Liquids Oxygenates Fuel Ethanol MTBE Other Oxygenates Biomass-based Diesel Fuel Other Renewable Diesel Fuel Other Renewable Fuels Gasoline Blending...

388

Numerical and experimental studies of ethanol flames and autoignition theory for higher alkanes  

E-Print Network (OSTI)

initiated ignition in methane-propane mixtures”, Combustiontemperature ignition of propane with MTBE as an additive:detonation in ethylene and propane mixtures”, Combustion and

Saxena, Priyank

2007-01-01T23:59:59.000Z

389

An Aerosol Condensation Model for Sulfur Trioxide  

SciTech Connect

This document describes a model for condensation of sulfuric acid aerosol given an initial concentration and/or source of gaseous sulfur trioxide (e.g. fuming from oleum). The model includes the thermochemical effects on aerosol condensation and air parcel buoyancy. Condensation is assumed to occur heterogeneously onto a preexisting background aerosol distribution. The model development is both a revisiting of research initially presented at the Fall 2001 American Geophysical Union Meeting [1] and a further extension to provide new capabilities for current atmospheric dispersion modeling efforts [2]. Sulfuric acid is one of the most widely used of all industrial chemicals. In 1992, world consumption of sulfuric acid was 145 million metric tons, with 42.4 Mt (mega-tons) consumed in the United States [10]. In 2001, of 37.5 Mt consumed in the U.S., 74% went into producing phosphate fertilizers [11]. Another significant use is in mining industries. Lawuyi and Fingas [7] estimate that, in 1996, 68% of use was for fertilizers and 5.8% was for mining. They note that H{sub 2}SO{sub 4} use has been and should continue to be very stable. In the United States, the elimination of MTBE (methyl tertiary-butyl ether) and the use of ethanol for gasoline production are further increasing the demand for petroleum alkylate. Alkylate producers have a choice of either a hydrofluoric acid or sulfuric acid process. Both processes are widely used today. Concerns, however, over the safety or potential regulation of hydrofluoric acid are likely to result in most of the growth being for the sulfuric acid process, further increasing demand [11]. The implication of sulfuric acid being a pervasive industrial chemical is that transport is also pervasive. Often, this is in the form of oleum tankers, having around 30% free sulfur trioxide. Although sulfuric acid itself is not a volatile substance, fuming sulfuric acid (referred to as oleum) is [7], the volatile product being sulfur trioxide. Sulfate aerosols and mist may form in the atmosphere on tank rupture. From chemical spill data from 1990-1996, Lawuyi02 and Fingas [7] prioritize sulfuric acid as sixth most serious. During this period, they note 155 spills totaling 13 Mt, out of a supply volume of 3700 Mt. Lawuyi and Fingas [7] summarize information on three major sulfuric acid spills. On 12 February 1984, 93 tons of sulfuric acid were spilled when 14 railroad cars derailed near MacTier, Parry Sound, Ontario. On 13 December 1978, 51 railroad cars derailed near Springhill, Nova Scotia. One car, containing 93% sulfuric acid, ruptured, spilling nearly its entire contents. In July 1993, 20 to 50 tons of fuming sulfuric acid spilled at the General Chemical Corp. plant in Richmond, California, a major industrial center near San Francisco. The release occurred when oleum was being loaded into a nonfuming acid railroad tank car that contained only a rupture disk as a safety device. The tank car was overheated and this rupture disk blew. The resulting cloud of sulfuric acid drifted northeast with prevailing winds over a number of populated areas. More than 3,000 people subsequently sought medical attention for burning eyes, coughing, headaches, and nausea. Almost all were treated and released on the day of the spill. By the day after the release, another 5,000 people had sought medical attention. The spill forced the closure of five freeways in the region as well as some Bay Area Rapid Transit System stations. Apart from corrosive toxicity, there is the additional hazard that the reactions of sulfur trioxide and sulfuric acid vapors with water are extremely exothermic [10, 11]. While the vapors are intrinsically denser than air, there is thus the likelihood of strong, warming-induced buoyancy from reactions with ambient water vapor, water-containing aerosol droplets, and wet environmental surface. Nordin [12] relates just such an occurrence following the Richmond, CA spill, with the plume observed to rise to 300 m. For all practical purposes, sulfur trioxide was the constituent released from the heated tank

Grant, K E

2008-02-07T23:59:59.000Z

390

AirUCI Summer Training Workshop in Environmental  

E-Print Network (OSTI)

schedule Syllabus Wet Lab: MTBE in gasoline and ethanol in vodka / mouthwash measured by FTIR FTIR Wet Lab: Determination of ethanol and benzene in gasoline by GCMS GCMS Wet Lab: Determination of PAH in cigarette smoke and benzene in gasoline by GC/MS - MTBE in gasoline and ethanol in vodka / mouthwash measured by FTIR

Nizkorodov, Sergey

391

Microsoft Word - BingQuestionOne1004.doc  

Gasoline and Diesel Fuel Update (EIA)

Supply Impacts of an MTBE Ban Supply Impacts of an MTBE Ban September 2002 ii Energy Information Administration/Supply Impacts of An MTBE Ban Contacts This report was prepared by the Office of Oil and Gas of the Energy Information Administration. General questions concerning the report may be directed to Mary J. Hutzler (202/586-2222, mhutzler@eia.doe.gov), Director, Office of Integrated Analysis and Forecasting, or Joanne Shore (202/586-4677, joanne.shore@eia.doe.gov), Team Leader, Petroleum Division. 1 Energy Information Administration/Supply Impacts of An MTBE Ban Supply Impacts of an MTBE Ban On June 17, 2002, Senator Jeff Bingaman, Chairman of the Senate Committee on Energy and Natural Resources, requested (Appendix A) that the Energy Information Administration (EIA) provide analysis of eight factors related to the Senate-passed fuels

392

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

FL Kansas City, MO Lake Charles, LA Los Angeles, CAFL Kansas City, MO Lake Charles, LA Los Angeles, CA

Carter, W P L

2007-01-01T23:59:59.000Z

393

The contribution of oceanic methyl iodide to stratospheric iodine  

E-Print Network (OSTI)

horizontal wind speed and vertical transport efficiency (speed Horizontal wind speed and vertical transport CH 3 Ivertical transport. Note that for these two days high www.atmos-chem-phys.net/13/11869/2013/ horizontal wind speeds

2013-01-01T23:59:59.000Z

394

Isoprenylcysteine Methylation and Demethylation Regulate Abscisic Acid Signaling in Arabidopsis  

Science Journals Connector (OSTI)

...tomato (Solanum lycopersicum) (Loraine et al., 1996; Yalovsky et al., 1996...Arabidopsis. Plant Physiol. 126: 670-684. Loraine, A.E., Yalovsky, S., Fabry, S...Cell 12: 1267-1278. Yalovsky, S., Loraine, A.E., and Gruissem, W. (1996...

David H. Huizinga; Olutope Omosegbon; Bilal Omery; Dring N. Crowell

2008-10-28T23:59:59.000Z

395

Hg L3 XANES Study of Mercury Methylation in Shredded  

E-Print Network (OSTI)

,indicatingbioaccumulationofmercury.Plantsamples collected at this site were also grown in nutrient solution with 1 ppm HgCl2 under (1) aerobic conditions

396

Some sympathomimetic activities of N-methyl-tyramine  

E-Print Network (OSTI)

this depletion by the blockage of the storage mechanism in the norepine- phrine granules and not by blocking a pump in the cell membrane (Dahlstrom et al. , 1965). It does not block the synthesis or action of catecholamines. Schumann and Philippu (1962) have... described another difference between the depletions produced by tyramine and by reserpine. Reserpine mobilizes both the catecholamines and the ATP of the storage granules while tyramine and other sympathomimetic amines release only the catecholamines...

Blankenship, James William

2012-06-07T23:59:59.000Z

397

Ethionine-induced Changes in Rat Liver Transfer RNA Methylation  

Science Journals Connector (OSTI)

...given food and water ad libitum...their drinking water for 3 days prior to the drug treatment and maintained...the drinking water. [Addition...supernatant. Where dialysis was used the...subjected to paper electrophoresis in ammo- nium...

Elsie Wainfan; Mary L. Moller; Frank A. Maschio; and M. Earl Balis

1975-10-01T23:59:59.000Z

398

The DNA methylation landscape of human early embryos  

Science Journals Connector (OSTI)

... Biodynamic Optical Imaging Center & Center for Reproductive Medicine, College of Life Sciences, Third Hospital, Peking University, Beijing 100871, China

Hongshan Guo; Ping Zhu; Liying Yan; Rong Li; Boqiang Hu; Ying Lian; Jie Yan; Xiulian Ren; Shengli Lin; Junsheng Li; Xiaohu Jin; Xiaodan Shi; Ping Liu; Xiaoye Wang; Wei Wang; Yuan Wei; Xianlong Li; Fan Guo; Xinglong Wu; Xiaoying Fan; Jun Yong; Lu Wen; Sunney X. Xie; Fuchou Tang; Jie Qiao

2014-07-23T23:59:59.000Z

399

Superhydrophobic Transparent Surface of Nanostructured Poly(Methyl Methacrylate)  

E-Print Network (OSTI)

Analysis of nonselective plasma etching of AlGaN by CF4/Ar/Cl2 V. Kuryatkov, B. Borisov, J. Saxena-period superlattices with various doping properties. Etching is performed using mixed CF4/Ar feed gases in a combined describe experiments on CF4-based plasma etching of AlGaN layers with widely varying com- positions

Kim, Ho-Young

400

Methyl arsenic adsorption and desorption behavior on iron oxides  

E-Print Network (OSTI)

as competitive ligands. Arsenic was measured by FI-HG-AAS. MMAsV and iAsV were adsorbed in higher amounts than DMAsV on goethite and ferrihydrite at all pH values studied. Although MMAsV and iAsV were adsorbed quantitatively at lower concentrations on goethite...

Lafferty, Brandon James

2005-08-29T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Classical trajectory simulations of photodissociation of methyl bromide at surfaces  

E-Print Network (OSTI)

as the P -phase of solid CH&Br to simulate dissociation from high coverages of the adsorbate where CH&Br ice is formed. The intermolecular interaction between the gas and surface atoms included long-range dispersion forces and short-range repulsive forces... ~ Cia coefficients for the interaction of CH&Br with LiF. 28 II. Structure and energetics parameters of CH&Br adsorbed on rough surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . " " 31 III. Buckingham potential parameters for CHsBr. . . 42...

Watson, Joseph Marion

2012-06-07T23:59:59.000Z

402

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

J. R. Holmes (1977): “Nitrogen Dioxide Photolysis in the LosO3 Ozone NO Nitric Oxide NO2 Nitrogen Dioxide NO3 NitrateNitrogen Pentoxide HONO Nitrous Acid HNO3 Nitric Acid HNO4 Peroxynitric Acid HO2H Hydrogen Peroxide CO Carbon Monoxide SO2 Sulfur Dioxide

Carter, W P L

2007-01-01T23:59:59.000Z

403

Diffusion of propane (1); 2-methyl-propane (2)  

Science Journals Connector (OSTI)

This document is part of Subvolume A ‘Gases in Gases, Liquids and their Mixtures’ of Volume 15 ‘Diffusion in Gases, Liquids and Electrolytes’ of Landolt-Börnstein Group IV ‘Physical Chemistry’. It is part of the ...

J. Winkelmann

2007-01-01T23:59:59.000Z

404

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

known amounts of ethylene, propane, propylene, n-butane, n-3 ppm -1 min -1 . (Primarily propane) ALK3 Alkanes and other

Carter, W P L

2007-01-01T23:59:59.000Z

405

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth  

Science Journals Connector (OSTI)

...sewage gas, and As(C2H5)3 has been recorded in landfill gas; they are likely formed by microbial action, thus...2C2H5As. Only sewage gas formed CH3AsH2, and only landfill gas formed (C2H5)3As. Particularly noteworthy is the...

Ronald Bentley; Thomas G. Chasteen

2002-06-01T23:59:59.000Z

406

Measurement of Mercury Methylation in Lake Water and Sediment Samples  

Science Journals Connector (OSTI)

...suggest a linear relation- ship between overall microbial activity...weeks to 4 days, enabling the detection of short-term fluctuations...seawater by ultra-violet radiation, analytical and other applications...no. 25. Canadian Fish and Marine Service, Winnipeg. 34. Stary...

Akira Furutani; John W. M. Rudd

1980-10-01T23:59:59.000Z

407

Sub-millimeter sized methyl butanoate droplet combustion: Microgravity experiments  

E-Print Network (OSTI)

1. Introduction Biodiesel is a renewable fuel source suitable for use within the current transport of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA b Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA Available online 5 September

Walter, M.Todd

408

Engineering of Bacterial Methyl Ketone Synthesis for Biofuels  

Science Journals Connector (OSTI)

...composition to optimize diesel fuel properties. Supplemental...for the synthesis of fuels and chemicals. Nature...2003. Tools for genetic engineering in the amino acid-producing...Knothe, G . 2008. biodiesel: optimizing fatty ester composition to improve fuel properties. Energy Fuels...

Ee-Been Goh; Edward E. K. Baidoo; Jay D. Keasling; Harry R. Beller

2011-10-28T23:59:59.000Z

409

Methylation of 16S RNA during ribosome assembly in vitro  

Science Journals Connector (OSTI)

... 16S RNA. Little is known, however, about the role of ribosomal proteins in the processing of precursor 16S RNA7. Recent experiments which demonstrated that 16S RNA from kasugamycin-resistant ... RNA and the assembly map (Fig. 4)14,16 indicates these proteins are strongly interrelated and occupy an early part of the map. In addition to S4, S8, ...

Pallaiah Thammana; William A. Held

1974-10-25T23:59:59.000Z

410

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth  

Science Journals Connector (OSTI)

...about 50%) is used in the pharmaceutical industry (76, 201, 254). The 1899 edition...metalloid compounds in gases from domestic waste deposits with GC/ICP-MS. Fresenius...1991. Microbial energetics applied to waste repositories. Experientia 47: 645-687...

Ronald Bentley; Thomas G. Chasteen

2002-06-01T23:59:59.000Z

411

Synthetic approaches to the activation of substituted 2-methyl pyridines  

E-Print Network (OSTI)

increases in the yield and rate of these reactions is an important objective. This thesis describes synthetic approaches to a new class of ligands containing two picolinic acid units conected together by a non-oxidizable chain. An improved procedure...

Cancanon, Fernadina de la Caridad

2012-06-07T23:59:59.000Z

412

Computational prediction of methylation status in human genomic sequences  

E-Print Network (OSTI)

H. Bestor , and Michael Q. Zhang* *Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724 and ¶Department of Chemical Engineering, Columbia University, New York, NY 10032 Communicated by Michael H. Wigler, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, April 12, 2006 (received for review October 25

413

Properties of some ionic liquids based on 1-methyl-3-octylimidazolium and 4-methyl-N-butylpyridinium cations.  

E-Print Network (OSTI)

Ionic liquids as green solvents: progress and prospects.ionic liquids are “green” solvents, i.e. , environmentally

Papaiconomou, Nicolas; Yakelis, Neal; Salminen, Justin; Bergman, Robert; Prausnitz, John M.

2005-01-01T23:59:59.000Z

414

Global budgets of oceanic and atmospheric methyl iodide: development of methyl iodide as a tracer for marine convection  

E-Print Network (OSTI)

), wetlands (7 Gg yr \\Gamma1 ) and wood fuel (3 Gg yr \\Gamma1 ) are also included in the model. A global

Jacob, Daniel J.

415

Synthesis and structure of methyl 8-allyl-6-bromo-2-methyl-1,2,3,4-tetrahydroquinoline-4-carboxylate  

SciTech Connect

The compound C{sub 15}H{sub 18}NO{sub 2}Br was synthesized and characterized by X-ray diffraction. The crystals belong to the monoclinic system, sp. gr. P2{sub 1}/n, a = 8.913(2) A, b = 23.637(6) A, c = 13.892(3) A, {beta} = 90.31(2){sup o}, Z = 8, V = 2926.8(12) A{sup 3}, {rho}{sub calc} = 1.472 g/cm{sup 3}. The bond lengths and bond angles in two molecules are equal within an experimental error and are typical of this class of compounds. The conformational differences of the saturated heterocyclic and methoxycarbonyl fragments of the molecules result in the presence of two crystallographically independent molecules in the crystal structure.

Zhuravleva, Yu. A., E-mail: orgchem@samgtu.ru; Zimichev, A. V.; Zemtsova, M. N. [Samara State Technical University (Russian Federation); Rybakov, V. B., E-mail: rybakov@struct.chem.msu.ru [Moscow State University, Department of Chemistry (Russian Federation); Klimochkin, Yu. N. [Samara State Technical University (Russian Federation)

2010-09-15T23:59:59.000Z

416

Molecular organization in the native state of woody tissue: Studies of tertiary structure using the Raman microprobe solid state 13C NMR and biomimetic tertiary aggregates. Progress report, July 1, 1989--June 30, 1993  

SciTech Connect

We have previously shown that all relatively pure plant and bacterial celluloses are, in their native states, composites of two lattice forms, I{sub {alpha}} and I{sub {beta}}, and that the two forms possess molecular chains in the same conformations but with different hydrogen bonding patterns. In the current period we have demonstrated that in higher plant cell wall matrices, the hemicelluloses are likely to have a regulatory function during the aggregation of cellulose. Different hemicelluloses appear to influence the aggregation in different ways. We have also developed preliminary evidence indicating the hemicelluloses may have a protective function against the action of some cellulolytic enzymes. The specific accomplishments during the current period are detailed. Demonstration that hemicelluloses present during biogenesis can transform bacterial cellulose into a cellulose typical of higher plant celluloses, and that each hemicellulose has a different effect on the pattern of aggregation. Evidence is presented that the hemicelluloses may limit the action of certain cellulolytic enzymes, suggesting that their function may go beyond regulation to include passive resistance to cellulolytic pathogens. Enhancing the potential of the Raman microprobe technique for mapping variability of lignin in the cell wall by identifying the contribution of the different substructures of lignin to the intensity of the key band in the Raman spectrum of lignin. Mapping of the variability of lignin across two cell wall sections. The mappings have convoluted within them both composition and concentration, but they demonstrate the potential of the method and point to the improvements we are now making so as to distinguish between variability of concentration and variability of composition.

Atalla, R.H.

1993-12-31T23:59:59.000Z

417

California's Move Toward E10 (released in AEO2009)  

Reports and Publications (EIA)

In Annual Energy Outlook 2009, (AEO) E10–a gasoline blend containing 10% ethanol–is assumed to be the maximum ethanol blend allowed in California erformulated gasoline (RFG), as opposed to the 5.7% blend assumed in earlier AEOs. The 5.7% blend had reflected decisions made when California decided to phase out use of the additive methyl tertiary butyl ether in its RFG program in 2003, opting instead to use ethanol in the minimum amount that would meet the requirement for 2.0% oxygen content under the Clean Air Act provisions in effect at that time.

2009-01-01T23:59:59.000Z

418

Directed evolution of phosphotriesterase: towards the efficient detoxification of sarin and soman  

E-Print Network (OSTI)

resulting in an inversion of configuration at the phosphorus center (Lewis et al., 1988). P O O O NO2 H2O -O NO2 O OH O + Scheme 1. The hydrolysis of paraoxon results in p-nitrophenol and diethylphosphate. In terms of tertiary folding, each monomer... in previous studies in which both the substituent size and the binding pocket size were varied (Chen-Goodspeed et al., 2001a,b). The effects of substrates containing either methyl, ethyl, isopropyl, and or phenyl substituents at the phosphorus center were...

Lum, Karin Tien

2004-09-30T23:59:59.000Z

419

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

Inputs & Utilization Inputs & Utilization Definitions Key Terms Definition All Other Motor Gasoline Blending Components Naphthas (e.g. straight-run gasoline, alkylate, reformate, benzene, toluene, xylene) used for blending or compounding into finished motor gasoline. Includes receipts and inputs of Gasoline Treated as Blendstock (GTAB). Excludes conventional blendstock for oxygenate blending (CBOB), reformulated blendstock for oxygenate blending, oxygenates (e.g. fuel ethanol and methyl tertiary butyl ether), butane, and pentanes plus. Barrel A unit of volume equal to 42 U.S. gallons. Blending Plant A facility which has no refining capability but is either capable of producing finished motor gasoline through mechanical blending or blends oxygenates with motor gasoline.

420

GEOLOGY, TAPHONOMY, AND PALEOECOLOGY OF A UNIQUE UPPER CRETACEOUS BONEBED NEAR THE CRETACEOUS-TERTIARY BOUNDARY IN SOUTH DAKOTA  

E-Print Network (OSTI)

remains……………………………..100 Figure 3.36 Fused hadrosaur caudal vertebrae with embedded theropod tooth………………..104 Figure 3.37 Pristine bone compared to one with “sun cracks”…………………………………105 Figure 3.38 Graph comparing number of specimens collected...

DePalma, Robert Anthony

2010-04-27T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Tertiary development of heavy oil sands through thermal stimulation in the Wilmington Oil Field, California: A geological perspective  

SciTech Connect

In 1995, a DOE cost share project was initiated to extend thermal recovery in the Tar Zone, Fault Block 11 of the West Wilmington Oil Field, California. The project involved the collection of old oil well data and the construction of a modern digital data base in order to develop a deterministic geological model. The plan was to rigorously define the geology such that horizontal wells could be accurately placed within the sands containing heavy oil to facilitate gravity drainage. A detailed deterministic geological model was constructed using a state of the art 3D mapping and modeling package. Beginning in July, 1995, five observation wells were drilled. Data inconsistencies were revealed when core hole OB2-003 was drilled. It was discovered that the data used to make the maps was corrupted; as a result, the predicted coring point was missed by more than 20'. Significant modifications to the data base were required due to inaccurate subsidence corrections in the original data set. Horizontal wells were then laid out based on the revised data and the geological model was completely reconstructed. Detailed cross sections extracted from the model were use for geosteering. These cross sections proved to be highly accurate and five more wells are now planned for the target sands. This detailed deterministic model will be further refined and combined with our geostatistical mode for geological control in an advanced reservoir simulator. If successful, the thermal stimulation project will be expanded to other fault blocks.

Clarke, D.D. (Department of Oil Properties, Long Beach, CA (United States)); Henry, M.J.; Strehle, R.W. (Dept. of Oil Properties, Long Beach, CA (United States))

1996-01-01T23:59:59.000Z

422

Tertiary development of heavy oil sands through thermal stimulation in the Wilmington Oil Field, California: A geological perspective  

SciTech Connect

In 1995, a DOE cost share project was initiated to extend thermal recovery in the Tar Zone, Fault Block 11 of the West Wilmington Oil Field, California. The project involved the collection of old oil well data and the construction of a modern digital data base in order to develop a deterministic geological model. The plan was to rigorously define the geology such that horizontal wells could be accurately placed within the sands containing heavy oil to facilitate gravity drainage. A detailed deterministic geological model was constructed using a state of the art 3D mapping and modeling package. Beginning in July, 1995, five observation wells were drilled. Data inconsistencies were revealed when core hole OB2-003 was drilled. It was discovered that the data used to make the maps was corrupted; as a result, the predicted coring point was missed by more than 20`. Significant modifications to the data base were required due to inaccurate subsidence corrections in the original data set. Horizontal wells were then laid out based on the revised data and the geological model was completely reconstructed. Detailed cross sections extracted from the model were use for geosteering. These cross sections proved to be highly accurate and five more wells are now planned for the target sands. This detailed deterministic model will be further refined and combined with our geostatistical mode for geological control in an advanced reservoir simulator. If successful, the thermal stimulation project will be expanded to other fault blocks.

Clarke, D.D. [Department of Oil Properties, Long Beach, CA (United States); Henry, M.J.; Strehle, R.W. [Dept. of Oil Properties, Long Beach, CA (United States)

1996-12-31T23:59:59.000Z

423

Outbreak of Pichia anomala Infection in the Pediatric Service of a Tertiary-Care Center in Northern India  

Science Journals Connector (OSTI)

...intensified hospital-wide health education campaign with poster displays, formal lectures...be controlled after a health education campaign to improve hand-washing...Postgraduate Institute of Medical Education and Research, Chandigarh 160012...

A. Chakrabarti; K. Singh; A. Narang; S. Singhi; R. Batra; K. L. N. Rao; P. Ray; S. Gopalan; S. Das; V. Gupta; A. K. Gupta; S. M. Bose; M. M. McNeil

2001-05-01T23:59:59.000Z

424

Healthcare associated bloodstream infections – secular trends of 8 years hospital-wide surveillance in a tertiary care university hospital  

Science Journals Connector (OSTI)

Introduced 1995 in acute care, prospective and systematic BSI surveillance at the University of Geneva hospitals was extended to a hospital-wide survey in 2003. Positive blood culture...

M-N Chraiti; W Zingg; V Sauvan; D Pittet

2011-06-01T23:59:59.000Z

425

P261: Study of hospital associated infections (HAI) at tertiary hospital in India; economic implication for developing countries  

Science Journals Connector (OSTI)

Over 1.4 million people worldwide suffer from HAI at any given time. Hospital wide prevalence of HAI varies from 5....1...]. This study focuses on the economic consequences and social burden of HAI cases in a ter...

S Satpathy; A Chaudhry; SK Gupta; A Kapil

2013-06-01T23:59:59.000Z

426

Volume and accessibility of entrained (solution) methane in deep geopressured reservoirs - tertiary formations of the Texas Gulf Coast. Final report  

SciTech Connect

The objective of this project was to appraise the total volume of in-place methane dissolved in formation waters of deep sandstone reservoirs of the onshore Texas Gulf Coast within the stratigraphic section extending from the base of significant hydrocarbon production (8000 ft)* to the deepest significant sandstone occurrence. The area of investigation is about 50,000 mi/sup 2/. Factors that determine the total methane resource are reservoir bulk volume, porosity, and methane solubility; the latter is controlled by the temperature, pressure, and salinity of formation waters. Regional assessment of the volume and the distribution of potential sandstone reservoirs was made from a data base of 880 electrical well logs, from which a grid of 24 dip cross sections and 4 strike cross sections was constructed. Solution methane content in each of nine formations or divisions of formations was determined for each subdivision. The distribution of solution methane in the Gulf Coast was described on the basis of five reservoir models. Each model was characterized by depositional environment, reservoir continuity, porosity, permeability, and methane solubility.

Gregory, A.R.; Dodge, M.M.; Posey, J.S.; Morton, R.A.

1980-10-01T23:59:59.000Z

427

Tunable Energy Transfer Rates via Control of Primary, Secondary, and Tertiary Structure of a Coiled Coil Peptide Scaffold  

Science Journals Connector (OSTI)

Dale J. Wilger †, Stephanie E. Bettis †, Christopher K. Materese †, Maria Minakova †, Garegin A. Papoian *‡, John M. Papanikolas *†, and Marcey L. Waters *† ... M. Kyle Brennaman, Cavan N. Fleming, Cheryl A. Slate, Scafford A. Serron, Stephanie E. Bettis, Bruce W. Erickson, John M. Papanikolas, and Thomas J. Meyer ... M. Kyle Brennaman, Cavan N. Fleming, Cheryl A. Slate, Scafford A. Serron, Stephanie E. Bettis, Bruce W. Erickson, John M. Papanikolas, and Thomas J. Meyer ...

Dale J. Wilger; Stephanie E. Bettis; Christopher K. Materese; Maria Minakova; Garegin A. Papoian; John M. Papanikolas; Marcey L. Waters

2012-06-08T23:59:59.000Z

428

Proportions of coarse and fine clay across the Cretaceous-Tertiary boundary in Milam, Falls, and Travis Counties, Texas  

E-Print Network (OSTI)

and are of little value. It is concluded that the method proposed in this thesis is capable of detecting small differences between clay sampi es at a = ingle locai ity, but prob. bly cannot be used to correlate samples f'rom one locality to another. i&1tlloagh... making dispersion and I'rac- tionation difficult. The efficiency of the X-ray diffraction t, echniques is also improved when these constituents are removed. As a simplified means of comp:rison, the various procedures performed on each sample...

Smith, John Charles

1966-01-01T23:59:59.000Z

429

A Major Meteorite Impact on the Earth 65 Million Years Ago: Evidence from the Cretaceous-Tertiary Boundary Clay  

Science Journals Connector (OSTI)

...and are normally depleted on the terrestrial...ISOTOPIC COMPOSITION OF URANIUM IN CHONDRITIC METEORITES...GRAZING ANIMALS, HEALTH PHYSICS 30 : 345...and are normally depleted on the terrestrial...since Pd is not depleted to the same extent...elements such as uranium in certain meteorites...

R. GANAPATHY

1980-08-22T23:59:59.000Z

430

Fistulotomy in the Tertiary Setting can Achieve High Rates of Fistula Cure with an Acceptable Risk of Deterioration in Continence  

Science Journals Connector (OSTI)

Surgery is the mainstay of treatment of anal fistulas. Low fistulas are often laid open, but higher fistulas present a more difficult problem. Patient choice centres on a compromise between risk of recurrence ...

P. Tozer; S. Sala; V. Cianci; K. Kalmar; G. K. Atkin…

2013-11-01T23:59:59.000Z

431

Stratigraphic and structural analysis of Shannon Sandstone, Teapot Dome field: implications for secondary and tertiary oil recovery  

SciTech Connect

The Department of Energy and Lawrence-Allison Associates have initiated three enhanced oil recovery (EOR) pilot projects in the last 4 years in the Shannon Sandstone at the Teapot Dome field. Performance of these pilot projects has generally been poor. As a result, a reevaluation of the geology for the entire field and for the pilot areas was conducted in an attempt to explain the pilots' performances. Based on core descriptions, conceptual reservoir flow patterns, and post-fireflood coring, only the bar-margin facies was found amenable to fluid displacement processes for oil recovery. This results in 25 million bbl of oil originally in place vs 180 million bbl of oil originally in place as a target for EOR. Stratigraphy alone does not explain the observed production patterns and simulation of the reservoir. Faulting and fracturing are extensive. Based on faults mapped in the in-situ pilot area, 12 to 16 northeast-trending normal faults per mile can be projected. Fracture orientations were obtained by mapping calcareous streaks in the upper and lower Shannon. These orientations confirm directions of premature fluid breakthroughs observed in the pilot projects and in the old East Teapot waterflood. Water resistivities and total dissolved solids measurements, water-cut maps, and daily oil production maps suggest that some faults are partial to total barriers to fluid flow across the field.

Chappelle, H.; Emsurak, G.; Obernyer, S.

1986-08-01T23:59:59.000Z

432

Reconstruction of Tertiary Metasequoia forests. II. Structure, biomass, and productivity of Eocene floodplain forests in the Canadian Arctic  

Science Journals Connector (OSTI)

...estimates of fossil biomass and productivity...Metasequoia had higher wood density than...branchwood and foliar biomass we relied on...closed-canopy plantations. This is a standard...Metasequoia had higher wood density than...branchwood and foliar biomass we relied on...closed-cano-py plantations. This is a standard...

Christopher J. Williams; Arthur H. Johnson; Ben A. LePage; David R. Vann; Tatsuo Sweda

433

Reconstruction of Tertiary Metasequoia forests. I. Test of a method for biomass determination based on stem dimensions  

Science Journals Connector (OSTI)

...crown in the Tanashi plantation. We developed branch...for foliage and branch wood of canopy branches cut from a variety of plantation-grown Metasequoia...the standard for forest biomass calculations (Sprugel...to analysis. Branch wood and foliage dry weights...

Christopher J. Williams; Arthur H. Johnson; Ben A. LePage; David R. Vann; Karen D. Taylor

434

Fuel Ethanol Oxygenate Production  

Gasoline and Diesel Fuel Update (EIA)

Product: Fuel Ethanol Methyl Tertiary Butyl Ether Merchant Plants Captive Plants Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day Product: Fuel Ethanol Methyl Tertiary Butyl Ether Merchant Plants Captive Plants Period-Unit: Monthly-Thousand Barrels Monthly-Thousand Barrels per Day Annual-Thousand Barrels Annual-Thousand Barrels per Day Download Series History Download Series History Definitions, Sources & Notes Definitions, Sources & Notes Show Data By: Product Area May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 View History U.S. 27,197 26,722 26,923 26,320 25,564 27,995 1981-2013 East Coast (PADD 1) 628 784 836 842 527 636 2004-2013 Midwest (PADD 2) 25,209 24,689 24,786 24,186 23,810 26,040 2004-2013 Gulf Coast (PADD 3) 523 404 487 460 431 473 2004-2013 Rocky Mountain (PADD 4) 450 432 430 432 415 429 2004-2013 West Coast (PADD 5)

435

Risindialogue Risindialogue  

E-Print Network (OSTI)

- based substances such as MTBE. There is a large global market for new technologies which may result systems which are suitable for the production of bioenergy and biomaterials, and which can at the same

436

Life-Cycle Water Impacts of U.S. Transportation Fuels  

E-Print Network (OSTI)

Generation Requirements. DOE/NETL-400/2008/1339; NationalGeneration Requirements. DOE/NETL-400/2008/1339; NationalMTBE MWD MWDOC NAICS NERC NETL NOAA NPCC NREL PADD PDI ppm

Scown, Corinne Donahue

2010-01-01T23:59:59.000Z

437

Saving Energy and Reducing Emissions from the Regeneration Air System of a Butane Dehydrogenation Plant  

E-Print Network (OSTI)

Texas Petrochemicals operates a butane dehydrogenation unit producing MTBE for reformulated gasoline that was originally constructed when energy was cheap and prior to environmental regulation. The process exhausts 900,000 pounds per hour of air...

John, T. P.

438

E-Print Network 3.0 - alcohol tba biodegradation Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

biodegradation. Inoculum size 0.3 g50 mL 0 20 40 60 80 100... in liquid phase, capture 14CO2. 12;Biodegradation of MTBE in Soil Columns Setup: Height: 47 cm ID: 4 Source:...

439

Cumene by catalytic distillation  

SciTech Connect

Catalytic distillation, a combination of catalytic reaction and distillation in a single column, has several advantages when used in a process to make cumene from benzene and propylene. An extremely high purity cumene is obtained in high yield. The catalytic distillation principle was used in an earlier process to make MTBE. A unit, started up up in Houston refinery in 1981, operated successfully for four years. Since then, three other MTBE units of this design have gone into service.

Shoemaker, J.D.; Jones, E.M. Jr.

1987-06-01T23:59:59.000Z

440

Mercury Distribution across 14 U.S. Forests. Part II: Patterns of Methyl Mercury Concentrations and Areal Mass of Total and Methyl Mercury  

Science Journals Connector (OSTI)

(9) In summary, the sites include (in order from south to north): (S1) a pine forest located near Gainesville, Florida; (S2) a mixed deciduous hardwood forest near Oak Ridge, Tennessee; (S3) an oak forest in Ashland, Missouri; (S4 and S5) two sites in the Sierra Nevada Mountain range south of Reno, Nevada, with one site affected by a stand-replacing wildfire in 1981 and an adjacent “intact” site that received no mature tree mortality;(28) (S6) a blue oak site in the foothills of California near Marysville; (S7 and S8) two Jeffrey pine forests near Truckee, California, where one site experienced prescribed burning treatments in 2002 while no prescribed burning was conducted in an adjacent site; (28) (S9) a high-elevation Rocky Mountain coniferous forest at Niwot Ridge, Colorado; (S10) a sugar-maple forest located near Hart, Michigan; (S11) a mixed, deciduous forest in Bartlett, New Hampshire; (S12) a coniferous forest in Howland, Maine; and (S13 and S14) two forest sites southeast of Seattle, Washington, one dominated by previously planted coniferous Douglas fir and an adjacent deciduous stand dominated by red alder. ... MeHg was analyzed for 12 of the 14 sites, not considering the two sites affected by prescribed burning and wildfires (sites S5 and S8). ...

Daniel Obrist

2012-04-22T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

GC and Mass Spectral Studies on Acylated Side Chain Regioisomers of 3-Methoxy-4-methyl-phenethylamine and 4-Methoxy-3-methyl-phenethylamine  

Science Journals Connector (OSTI)

......amine in 50 L of ethyl acetate followed by addition...with 200 L of ethyl acetate and 50 L of pyridine...working solutions. Synthesis The methods for the...upon reduction with lithium aluminum hydride (LAH...R.F.X. Klein. Synthesis and characteri- zation......

Tamer Awad; Jack DeRuiter; Tarek Belal; C. Randall Clark

2009-04-01T23:59:59.000Z

442

Tertiary Volcanic Rocks, Mogollon-Datil Province, New Mexico, and Surrounding Region: K-Ar Dates, Patterns of Eruption, and Periods of Mineralization  

Science Journals Connector (OSTI)

...poor run. Intrudes Spears and Hells Mesa Formations (nos. 2, 3, 4, 5...Correlation uncertain Caps Hells Mesa and younger rocks in type section...Los Pi os Mountains, and North Chupadera Mesa, Valencia, Torrance, and Socorro...

443

The Effect of the Di-Tertiary Butyl Peroxide (DTBP) additive on HCCI Combustion of Fuel Blends of Ethanol and Diethyl Ether  

E-Print Network (OSTI)

Ignition Using Isooctane, Ethanol and Natural Gas - AModel for High Temperature Ethanol Oxidation," Internationalof Bio-Derived Carbon from Ethanol-in-Diesel Blends in the

Mack, John Hunter; Buchholz, Bruce A; Flowers, Daniel L; Dibble, Robert W

2005-01-01T23:59:59.000Z

444

Southern Cordilleran Basaltic Andesite suite, southern Chihuahua, Mexico: A link between Tertiary continental arc and flood basalt magmatism in the North America  

SciTech Connect

Mid-Cenozoic orogenic andesites and ignimbrites of western Mexico, southwestern New Mexico, and Arizona are commonly capped by basaltic andesites, most from 29--20 Ma. We refer to these mafic lavas as the Southern Cordilleran Basaltic Andesite (SCORBA) suite, and they may constitute the most extensive Cenozoic basaltic suite in North America. The SCORBA suite has trace element and isotopic characteristics of orogenic (arc) rocks (i.g., Ba/Nb/gt/40), and silica content (53--56% SiO/sub 2/) like the Grande Ronde Basalt, which represents about 80% of the volume of the Columbia River Group. Geochemical and isotopic data are presented on SCORBA lavas and rare mafic lavas (PRE-SCORBA) interlayered with older ignimbrites from a 700-km-long NE-SW transect of southern Chihuahua, Mexico. SCORBA and PRE-SCORBA lavas with relatively low K/P (/lt/7) and differing Ba/Nd (50 versus 18) have similar isotopic compositions, arguing against their isotopic signatures being controlled by crustal assimilation. Along the entire length of the transect, the basaltic rocks have /var epsilon//sub Nd/ and /sup 87/Sr//sup 86/Sr near bulk Earth and /sup 206/Pb//sup 204/Pb and /sup 207/Pb//sup 204/Pb ratios that lie along a 1.7 Ga pseudoisochron. The Pb isotopic variation is geographically controlled, becoming more radiogenic from east to west, reflecting mixing in mantle source regions. The eastern mantle source has low/sup 206/Pb//sup 204/Pb and is a mixture of an enriched, enriched-mantle-like (EMI) component with one or more depleted components, which could include an intraplate component with relatively high Nb/Y (/gt/0.8).

Cameron, K. L.; Nimz, G. J.; Kuentz, D.; Niemeyer, S.; Gunn, S.

1989-06-10T23:59:59.000Z

445

Comparison of maternal and neonatal outcome before and after the availability of a rapid assay for fetal fibronectin at a tertiary level maternity hospital  

E-Print Network (OSTI)

in decisions to admit to hospital for preterm labor. Clinlabour at Middlemore Hospital, New Zealand. Pathology, 37, (negative predictive value for hospital admission after fetal

Poeltler, Debra Ann Milbert

2010-01-01T23:59:59.000Z

446

Investigating Returns to Investments in Education: An Empirical Study Estimating Returns to Primary, Secondary and Tertiary Education for Countries at Different Levels of Economic Development  

E-Print Network (OSTI)

refer to where in education governments should invest in order to obtain the highest returns, based on the specific characteristics of their countries (i.e. level of economic development). The purpose of this dissertation is to estimate and determine...

Lozano, Ricardo Viviano

2012-07-16T23:59:59.000Z

447

Advances in mass storage technology are producing devices capable of holding terabytes of data. These new devices, often called tertiary storage devices, have dramatically different performance  

E-Print Network (OSTI)

-overwrite technique for managing storage. This technique allows the user to see the entire history of the database of the database at any moment in history. This capability is referred to as time travel. Since only the start time characteristics than magnetic disks. Conventional database systems include explicit dependen- cies on magnetic

California at Irvine, University of

448

Study of the kinetics of the gas-phase, iodine catalyzed elimination of HBr from isobutylbromide: the tertiary C-H bond dissociation energy in isobutylbromide.  

E-Print Network (OSTI)

, (with the possible exception of the very electronegative F atom) unless the substituent can delocalize the odd electron such as with the vinyI substituent, i. e. the allyl radical. The stabi'Iization energy is defined as the difference between... of formation of the radical. f s indicated in section (II); the stabilization energy of bromine bridged radical by the delocalization of tne odd electron can be obtained by comparisior, with a localized free radical. Thus, the stabi11zat1on energy...

Jirustithipong, Pongsiri

2012-06-07T23:59:59.000Z

449

Occurrence of Tertiary Lymphoid Tissue Is Associated with T-Cell Infiltration and Predicts Better Prognosis in Early-Stage Colorectal Cancers  

Science Journals Connector (OSTI)

...obtained from the Institutional Intranet; please refer to Supplementary...data from the institutional intranet (Supplementary Table S1...and CD3+ TILs, baseline characteristics and tumor features of patient...the patient histopathologic characteristics are described in Supplementary...

Giuseppe Di Caro; Francesca Bergomas; Fabio Grizzi; Andrea Doni; Paolo Bianchi; Alberto Malesci; Luigi Laghi; Paola Allavena; Alberto Mantovani; and Federica Marchesi

2014-04-15T23:59:59.000Z

450

Occurrence of female genital tuberculosis among infertile women: a study from a tertiary maternal health care research centre in South India  

Science Journals Connector (OSTI)

The purpose of this investigation was to estimate the proportion of female genital tuberculosis (FGTB) among infertile women, along with the mean cost of diagnosis by different methods. The study was carried o...

V. Bhanothu; J. P. Theophilus; P. K. Reddy…

2014-11-01T23:59:59.000Z

451

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

Total Stocks Total Stocks Definitions Key Terms Definition All Other Motor Gasoline Blending Components Naphthas (e.g. straight-run gasoline, alkylate, reformate, benzene, toluene, xylene) used for blending or compounding into finished motor gasoline. Includes receipts and inputs of Gasoline Treated as Blendstock (GTAB). Excludes conventional blendstock for oxygenate blending (CBOB), reformulated blendstock for oxygenate blending, oxygenates (e.g. fuel ethanol and methyl tertiary butyl ether), butane, and pentanes plus. Asphalt A dark-brown-to-black cement-like material containing bitumens as the predominant constituent obtained by petroleum processing; used primarily for road construction. It includes crude asphalt as well as the following finished products: cements, fluxes, the asphalt content of emulsions (exclusive of water), and petroleum distillates blended with asphalt to make cutback asphalts. Note: The conversion factor for asphalt is 5.5 barrels per short ton.

452

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

Weekly Supply Estimates Weekly Supply Estimates Definitions Key Terms Definition All Other Motor Gasoline Blending Components Naphthas (e.g. straight-run gasoline, alkylate, reformate, benzene, toluene, xylene) used for blending or compounding into finished motor gasoline. Includes receipts and inputs of Gasoline Treated as Blendstock (GTAB). Excludes conventional blendstock for oxygenate blending (CBOB), reformulated blendstock for oxygenate blending, oxygenates (e.g. fuel ethanol and methyl tertiary butyl ether), butane, and pentanes plus. Asphalt A dark-brown-to-black cement-like material containing bitumens as the predominant constituent obtained by petroleum processing; used primarily for road construction. It includes crude asphalt as well as the following finished products: cements, fluxes, the asphalt content of emulsions (exclusive of water), and petroleum distillates blended with asphalt to make cutback asphalts. Note: The conversion factor for asphalt is 5.5 barrels per short ton.

453

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

Imports & Exports Imports & Exports Definitions Key Terms Definition All Other Motor Gasoline Blending Components Naphthas (e.g. straight-run gasoline, alkylate, reformate, benzene, toluene, xylene) used for blending or compounding into finished motor gasoline. Includes receipts and inputs of Gasoline Treated as Blendstock (GTAB). Excludes conventional blendstock for oxygenate blending (CBOB), reformulated blendstock for oxygenate blending, oxygenates (e.g. fuel ethanol and methyl tertiary butyl ether), butane, and pentanes plus. Barrel A unit of volume equal to 42 U.S. gallons. Conventional Blendstock for Oxygenate Blending (CBOB) Motor gasoline blending components intended for blending with oxygenates to produce finished conventional motor gasoline. Conventional Gasoline Finished motor gasoline not included in the oxygenated or reformulated gasoline categories. Excludes reformulated gasoline blendstock for oxygenate blending (RBOB) as well as other blendstock.

454

Catalytic distillation process  

DOE Patents (OSTI)

A method is described for conducting chemical reactions and fractionation of the reaction mixture comprising feeding reactants to a distillation column reactor into a feed zone and concurrently contacting the reactants with a fixed bed catalytic packing to concurrently carry out the reaction and fractionate the reaction mixture. For example, a method for preparing methyl tertiary butyl ether in high purity from a mixed feed stream of isobutene and normal butene comprising feeding the mixed feed stream to a distillation column reactor into a feed zone at the lower end of a distillation reaction zone, and methanol into the upper end of said distillation reaction zone, which is packed with a properly supported cationic ion exchange resin, contacting the C[sub 4] feed and methanol with the catalytic distillation packing to react methanol and isobutene, and concurrently fractionating the ether from the column below the catalytic zone and removing normal butene overhead above the catalytic zone.

Smith, L.A. Jr.

1982-06-22T23:59:59.000Z

455

Catalytic distillation process  

DOE Patents (OSTI)

A method for conducting chemical reactions and fractionation of the reaction mixture comprising feeding reactants to a distillation column reactor into a feed zone and concurrently contacting the reactants with a fixed bed catalytic packing to concurrently carry out the reaction and fractionate the reaction mixture. For example, a method for preparing methyl tertiary butyl ether in high purity from a mixed feed stream of isobutene and normal butene comprising feeding the mixed feed stream to a distillation column reactor into a feed zone at the lower end of a distillation reaction zone, and methanol into the upper end of said distillation reaction zone, which is packed with a properly supported cationic ion exchange resin, contacting the C.sub.4 feed and methanol with the catalytic distillation packing to react methanol and isobutene, and concurrently fractionating the ether from the column below the catalytic zone and removing normal butene overhead above the catalytic zone.

Smith, Jr., Lawrence A. (Bellaire, TX)

1982-01-01T23:59:59.000Z

456

Isolation and characterization of methyl viologen-sensitive mutants of Escherichia coli K-12.  

Science Journals Connector (OSTI)

...MV), or paraquat, is a powerful superoxide radical propa- gator (12, 17, 18). MV is readily reduced by a single electron...only to MV and are resistant to other active oxygen propa- gator reagents (19) such as hydrogen peroxide and ionizing radiation...

M Morimyo

1988-05-01T23:59:59.000Z

457

Calmodulin-Mediated Signal Transduction Pathways in Arabidopsis Are Fine-Tuned by Methylation  

Science Journals Connector (OSTI)

...unique corresponding sites. CaM KMT OX Construct A synthetic DNA fragment of general structure 5-XhoI-native CaM...HindIII-CaM KMT was designed and the corresponding synthetic DNA fragment generated (GeneArt; see Supplemental Table...

Joydeep Banerjee; Roberta Magnani; Meera Nair; Lynnette M. Dirk; Seth DeBolt; Indu B. Maiti; Robert L. Houtz

2013-11-27T23:59:59.000Z

458

Effect of Methyl Methanesulfonate on Macromolecular Biosynthesis in P388F Cells  

Science Journals Connector (OSTI)

...4-Dimethanesulphonoxybutane (Myleran), S-/3-L-Alanyltetrahydrothiophenium Mesylate, Tetrahydrothiophene and Tetrahydrothiophene-l:l-dioxide in the Rat, Rabbit and Mouse. Biochem. Pharmacol., 6: 217- 227, 1961...

Brian W. Fox and Margaret Fox

1967-11-01T23:59:59.000Z

459

Maize Chromomethylase Zea methyltransferase2 Is Required for CpNpG Methylation  

Science Journals Connector (OSTI)

...RACE). RACE was conducted using the Marathon cDNA Amplification Kit (Clontech, Palo...isolated, and ends were sequenced using Marathon primers and gene-specific primers...100-muL aliquots and overlaid with mineral oil. The bisulfite modification was conducted...

Charles M. Papa; Nathan M. Springer; Michael G. Muszynski; Robert Meeley; Shawn M. Kaeppler

460

Fate of Triclosan and Triclosan-Methyl in Sewage TreatmentPlants and Surface Waters  

Science Journals Connector (OSTI)

The fate of triclosan in diverse stages of two sewage treatment ... two-stage biologic (activated sludge) process removed triclosan more efficiently than the STP with a ... not very effective. The elimination rat...

Kai Bester

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Inhibition of Host Cell Ribosomal Ribonucleic Acid Methylation by Foot-and-Mouth Disease Virus  

Science Journals Connector (OSTI)

...chromatography, which has a high resolving power for the nucleic acids (based on secondary...and J. Polatnick. 1968. The site of foot-and-mouth disease virus ribonucleic...and G. Vande Woude. 1966. Studies on foot-and-mouth disease virus ribonucleic...

Richard Ascione; George F. Vande Woude

1969-11-01T23:59:59.000Z

462

Unconventional Air-Stable Interdigitated Bilayer Formed by 2,3-Disubstituted Fatty Acid Methyl Esters  

Science Journals Connector (OSTI)

The diffusion-limited aggregation (DLA) model is applied to describe the formation of the fractal structures of the bilayer as observed in the second plateau. ... For the fluorescence microscopy investigations, the film balance (144 cm2, Riegler & Kirstein) was mounted onto the stage of the Olympus microscope BX-FLA (Hamburg, Germany) equipped with a mercury lamp (USH-102D 100 W, power supply unit BH2-RFL-T3), an objective (LMPLFL 50×), and a CCD camera with a camera controller (Hamamatsu C4742-95, Hamamatsu, Japan). ...

Xiaodong Chen; Susanne Wiehle; Markus Weygand; Gerald Brezesinski; Ute Klenz; Hans-Joachim Galla; Harald Fuchs; Günter Haufe; Lifeng Chi

2005-10-05T23:59:59.000Z

463

Carbon-Sulfur Bond Cleavage of Methyl-Substituted Thiophenes with Iridium(III)  

E-Print Network (OSTI)

author. E-mail: jones@chem.rochester.edu. (1) Topsøe, H.; Clausen, B. S.; Massoth, F. E. Hydrotreating

Jones, William D.

464

Catalytic Hydrodeoxygenation of Methyl-Substituted Phenols: Correlations of Kinetic Parameters with Molecular Properties  

E-Print Network (OSTI)

. Introduction As a result of increasing environmental concerns, catalytic hydrotreating has become an important, oil shale, and tar sands would render the hydrotreating of oxygen-containing com- pounds, mostly

Simons, Jack

465

Absorption Spectra and Photolysis of Methyl Peroxide in Liquid and Frozen Water  

E-Print Network (OSTI)

, University of California, Irvine, California 92697, United States Department of Physical Chemistry with low temperatures, in the presence of clouds with a high liquid-water content and large solar zenith

Nizkorodov, Sergey

466

Toward Organic Photohydrides: Excited-State Behavior of 10-Methyl-9-phenyl-9,10-dihydroacridine  

E-Print Network (OSTI)

, United States § Department of Chemistry, University of Southern California, Los Angeles, California 90089 be powered using the photon's energy. Such a photochemical event can, in turn, be used to generate solar

Krylov, Anna I.

467

Photochemistry of Methyl Bromide on the ?-Cr2O3(0001) Surface...  

NLE Websites -- All DOE Office Websites (Extended Search)

desorption (PSD). Irradiation of adsorbed CH3Br with broad band light from a Hg arc lamp resulted in both photodesorption and photodecomposition of the parent molecule at...

468

Multiple Fatalities Involving a New Designer Drug: Para-Methyl-4-Methylaminorex  

Science Journals Connector (OSTI)

......so-called head shops or over the internet and are often described as not...submitted in a number of drug abuse deaths; some of which were...Aks S.E. Emerging drugs of abuse. Emergency Medicine Clinics...Future synthetic drugs of abuse. (1988) Castonguay, R......

S. Cosbey; S. Kirk; M. McNaul; L. Peters; B. Prentice; A. Quinn; S.P. Elliott; S.D. Brandt; R.P. Archer

2014-01-01T23:59:59.000Z

469

Production and Fate of Methylated Sulfur Compounds from Methionine and Dimethylsulfoniopropionate in Anoxic Salt Marsh Sediments  

Science Journals Connector (OSTI)

...2374-2377. 15. Howarth, R. W., and J. M...a New England salt marsh. Limnol. Oceanogr...reduction pathways in salt marsh sediments. Limnol...1037-1051. 18. Kiene, R. P., R. S. Oremland...26. Oremland, R. S., L. Marsh, and D. J. DesMarais...

Ronald P. Kiene; Pieter T. Visscher

1987-10-01T23:59:59.000Z

470

Effect of Unburned Methyl Esters on the NOx Conversion of Fe-Zeolite SCR Catalyst  

SciTech Connect

Engine and flow reactor experiments were conducted to determine the impact of biodiesel relative to ultra-low-sulfur diesel (ULSD) on inhibition of the selective catalytic reduction (SCR) reaction over an Fe-zeolite catalyst. Fe-zeolite SCR catalysts have the ability to adsorb and store unburned hydrocarbons (HC) at temperatures below 300 C. These stored HCs inhibit or block NO{sub x}-ammonia reaction sites at low temperatures. Although biodiesel is not a hydrocarbon, similar effects are anticipated for unburned biodiesel and its organic combustion products. Flow reactor experiments indicate that in the absence of exposure to HC or B100, NO{sub x} conversion begins at between 100 and 200 C. When exposure to unburned fuel occurs at higher temperatures (250-400 C), the catalyst is able to adsorb a greater mass of biodiesel than of ULSD. Experiments show that when the catalyst is masked with ULSD, NO{sub x} conversion is inhibited until it is heated to 400 C. However, when masked with biodiesel, NO{sub x} conversion is observed to begin at temperatures as low as 200 C. Engine test results also show low-temperature recovery from HC storage. Engine tests indicate that, overall, the SCR system has a faster recovery from HC masking with biodiesel. This is at least partially due to a reduction in exhaust HCs, and thus total HC exposure with biodiesel.

Williams, A.; Ratcliff, M.; Pedersen, D.; McCormick, R.; Cavataio, G.; Ura, J.

2010-03-01T23:59:59.000Z

471

Reverse Atom Transfer Radical Polymerization of Methyl Methacrylate in Room-Temperature Ionic Liquids  

E-Print Network (OSTI)

liq- uids have been considered and used as a new generation of green solvents for a number of or solvents, a much smaller amount of the catalyst was used. After a relatively easy removal of the polymer Chemistry, Vol. 41, 143­151 (2003) © 2002 Wiley Periodicals, Inc. 143 #12;tion solvents will make

Wan, Xin-hua

472

Methylation of Histone H3 Lysine 36 Is Required for Normal Development in Neurospora crassa  

Science Journals Connector (OSTI)

...slowly, and though they produced abundant aerial hyphae, they conidiated sparsely (Fig...Microscopic examination revealed that most aerial hyphae lacked the constrictions and budding...Yoshiura Ki, T. Ohta, T. Kishino, Y. Fukushima, N. Niikawa, and N. Matsumoto. 2002...

Keyur K. Adhvaryu; Stephanie A. Morris; Brian D. Strahl; Eric U. Selker

2005-08-01T23:59:59.000Z

473

Disruption of DNA methylation induces genome-specific changes in gene expression in Arabidopsis allotetraploids  

E-Print Network (OSTI)

the contrib- uted genomes of the new polyploid are meiotically recombinant or nonrecombinant, re- spectively, where the meiotic behavior reflects genome ?divergence?. Polyploidy is a prominent phenomenon among plants. 1Around 95% of angiosperms and 70... that govern gene expression in polyploids. The subspecies Arabidopsis thaliana and A. arenosa diverged from each other ~5.8 Mya and share more than 95% similarity in genomic sequence (Koch et al., 2001). Interspecific hybridization can occur between...

Chen, Meng

2007-04-25T23:59:59.000Z

474

Type II restriction-modification system methylation subunit of Alicyclobacillus acidocaldarius  

DOE Patents (OSTI)

Isolated and/or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius are provided. Further provided are methods for modulating or altering recombination inside or outside of a cell using isolated and/or purified polypeptides and/or nucleic acid sequences from Alicyclobacillus acidocaldarius.

Lee, Brady D; Newby, Deborah T; Lacey, Jeffrey A; Thompson, David N; Thompson, Vicki S; Apel, William A; Roberto, Francisco F; Reed, David W

2013-10-29T23:59:59.000Z

475

Mechanisms Regulating Mercury Bioavailability for Methylating Microorganisms in the Aquatic Environment: A Critical Review  

E-Print Network (OSTI)

crystalline particles that cannot be adequately represented by conventional chemical equilibrium models for Hg widely in the nature (even in remote areas) through a complex web of trans- formation and transport of thousands of children are born each year with in utero MeHg exposures exceeding health guidelines.5

476

Sulfate-Reducing Bacterium Desulfovibrio desulfuricans ND132 as a Model for Understanding Bacterial Mercury Methylation  

Science Journals Connector (OSTI)

...Phylogenetically, ND132 falls into a large group of salt-tolerant...Mercury Science Focus Area Program at Oak Ridge National...Minnesota): importance of atmospheric deposition and ecosystem...Article Research Support, Non-U.S. Gov't Research...Support, U.S. Gov't, Non-P.H.S. | 0 DNA...

Cynthia C. Gilmour; Dwayne A. Elias; Amy M. Kucken; Steven D. Brown; Anthony V. Palumbo; Christopher W. Schadt; Judy D. Wall

2011-04-22T23:59:59.000Z

477

Kinetics of methyl radical-hydroxyl radical collisions and methanol decomposition.  

SciTech Connect

The CH{sub 3} + OH bimolecular reaction and the dissociation of methanol are studied theoretically at conditions relevant to combustion chemistry. Kinetics for the CH{sub 3} + OH barrierless association reaction and for the H + CH{sub 2}OH and H + CH{sub 3}O product channels are determined in the high-pressure limit using variable reaction coordinate transition state theory and multireference electronic structure calculations to evaluate the fragment interaction energies. The CH{sub 3} + OH {yields} {sup 3}CH{sub 2} + H{sub 2}O abstraction reaction and the H{sub 2} + HCOH and H{sub 2} + H{sub 2}CO product channels feature localized dynamical bottlenecks and are treated using variational transition state theory and QCISD(T) energies extrapolated to the complete basis set limit. The {sup 1}CH{sub 2} + H{sub 2}O product channel has two dynamical regimes, featuring both an inner saddle point and an outer barrierless region, and it is shown that a microcanonical two-state model is necessary to properly describe the association rate for this reaction over a broad temperature range. Experimental channel energies for the methanol system are reevaluated using the Active Thermochemical Tables (ATcT) approach. Pressure dependent, phenomenological rate coefficients for the CH{sub 3} + OH bimolecular reaction and for methanol decomposition are determined via master equation simulations. The predicted results agree well with experimental results, including those from a companion high-temperature shock tube determination for the decomposition of methanol.

Jasper, A. W.; Klippenstein, S. J.; Harding, L. B.; Ruscic, B.; Chemistry

2007-01-01T23:59:59.000Z

478

Neutron Scattering Study of Vermiculite?Poly(vinyl methyl ether) Mixtures  

Science Journals Connector (OSTI)

Neutrons scattered by the gel samples were recorded on a two-dimensional area detector, software coded as 128 × 128 pixels, situated 1.5 m behind the samples, covering the approximate q range between 0.2 and 2 nm-1, where the wavenumber q is defined by the equation with ? being the scattering angle. ... The quartz sample cells used were practically transparent to neutrons at the wavelength utilized on the SANS-J, and the small angle neutron scattering from D2O was of low intensity and completely unstructured over the q range studied. ...

H. Jinnai; M. V. Smalley; T. Hashimoto; S. Koizumi

1996-03-06T23:59:59.000Z

479

Reactions of Methyl Perfluoroalkyl Ethers with Isopropyl Alcohol: Experimental and Theoretical Studies  

Science Journals Connector (OSTI)

B&W Pantex, LLC, Amarillo, Texas 79120, United States ... Chemicals and Materials ... Physical Chemistry Chemical Physics (2007), 9 (29), 3864-3871 CODEN: PPCPFQ; ISSN:1463-9076. ...

Howard C. Knachel; Vladimir Benin; Chadwick D. Barklay; Janine C. Birkbeck; Billy D. Faubion; William E. Moddeman

2012-07-16T23:59:59.000Z

480

A study of the mixed association of cholesterol with methyl cholate by vapor pressure osmometry  

E-Print Network (OSTI)

out on a Knauer Vapor Pressure Osmometer equipped w1th the Knauer Universal Temperature Measuring Apparatus (a sensitive Wheatstone bridge with a 10-turn helical potentiometer) and a chart recorder. A thorough discussion of some of the experimental... at the desired temperature. Two themistors are mounted in the chamber and are coupled to the Wheatstone bridge. Using syr1nges, a drop of pure solvent is placed on one themistor and a drop of solution on the other. Because of the lowering of solvent vapor...

Foster, Bruce William

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "mtbe methyl tertiary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

CpG Island Methylator Phenotype Association with Elevated Serum ?-Fetoprotein Level in Hepatocellular Carcinoma  

Science Journals Connector (OSTI)

...that only a subset of EGR1-containing, WTI-responsive promoters may be physiologically...supplementalglutamine. Sequence analysis of the WTI transcript has been described previously...to examine the expression of postulated WTI-target genes with EGR1-containing promoters...

Changsong Zhang; Zhengyou Li; Yue Cheng; Fengqi Jia; Rong Li; Mengchao Wu; Ke Li; Lixin Wei

2007-02-01T23:59:59.000Z

482

DNMT1 Is Regulated by ATP-Citrate Lyase and Maintains Methylation Patterns during Adipocyte Differentiation  

Science Journals Connector (OSTI)

...nuclear pellet was resuspended in 500 mul of nuclear lysis buffer (50 mM Tris [pH 8], 5...acetyl-CoA can contribute to the regulation of nuclear histone acetylation (7). Protein levels...C Carlberg, and L Sinkkonen. 2012. Dataset integration identifies transcriptional...

Tatiana Londońo Gentile; Chao Lu; Peter M. Lodato; Sarah Tse; Scott H. Olejniczak; Eric S. Witze; Craig B. Thompson; Kathryn E. Wellen

2013-07-29T23:59:59.000Z

483

E-Print Network 3.0 - arsenic methylation capability Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

of the discovery of arsenic in drinking-water in Bangladesh and recommends intervention strategies Source: California at Berkeley, University of - School of Public Health,...

484

E-Print Network 3.0 - aromatic hydrocarbons methyl Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Renewable Energy 2 Quantification of Local Ozone Production Attributable to Automobile Hydrocarbon Emissions Summary: -fueled automobiles, most cyclic hydrocarbons are...

485

The High-Pressure Characterization of Energetic Materials: 2-Methyl-5-Nitramino-2H-Tetrazole  

SciTech Connect

The isothermal structural properties, equation of state, and vibrational dynamics of 2MNT were studied under high-pressure using synchrotron XRD and optical Raman and IR microspectroscopy. Analysis of the XRD patterns revealed no indication of a phase transition to near 15 GPa and the pressure-volume isotherm remained smooth to 15 GPa. Near 15 GPa, significant sample damage was observed from the X-ray beam which precluded the acquisition of patterns above this pressure. XRD and Raman spectroscopic measurements showed the monoclinic ambient condition phase of 2MNT remains the dominant phase to near 20 GPa, although a shift of the NO{sub 2} IR active vibrational modes to lower frequencies suggested a subtle geometry modification not reflected in the XRD data.

J Ciezak

2011-12-31T23:59:59.000Z

486

Cysteine Dioxygenase 1 Is a Tumor Suppressor Gene Silenced by Promoter Methylation in Multiple Human Cancers  

E-Print Network (OSTI)

purchased from Invitrogen (Carlsbad, CA), and the TaqManTrizol (Invitrogen, Carlsbad, CA) and reverse- transcribed

2012-01-01T23:59:59.000Z

487

On the spherically symmetrical combustion of methyl decanoate droplets and comparisons with detailed numerical modeling  

E-Print Network (OSTI)

.e., 40­50% for CI compared to 25­30% for SI). As such, diesel power has the potential for an immediate impact on petroleum consumption, especially when conventional diesel is blended with bio-diesel fuels [3­5]. Blending diesel fuel with a fuel derived from sustainable sources will have an immediate impact

Walter, M.Todd

488

Stochastic subwavelength structures on poly(methyl methacrylate) surfaces for antireflection generated by plasma treatment  

Science Journals Connector (OSTI)

Subwavelength structures of sufficient height-to-width aspect ratio are adequate for reduction of the Fresnel reflection of surfaces. In the case of low-pressure plasma-treated...

Leitel, Robert; Schulz, Ulrike; Kaiser, Norbert; Tünnermann, Andreas

2008-01-01T23:59:59.000Z

489

E-Print Network 3.0 - agent tm208 4-methyl-piperazine-1-carbodithioc...  

NLE Websites -- All DOE Office Websites (Extended Search)

mercy of ill-intending agent platforms. We have devised Source: Roth, Volker - FX Palo Alto Laboratory Collection: Computer Technologies and Information Sciences 31 Intelligent...

490

Partitioning and Degradation of Triclosan and Formation of Methyl-Triclosan in Water-Sediment Systems  

Science Journals Connector (OSTI)

Adsorption and degradation processes of triclosan (TCS) were studied in the laboratory...K d) varied from 147 to 1,425 mL ?g?1.... The sediment with a higher organic carbon content and a lower pH ...

Xiaolong Huang; Chenxi Wu; Xiong Xiong; Kai Zhang…

2014-08-01T23:59:59.000Z

491

E-Print Network 3.0 - atropine methyl bromide Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

environmental significance. For example, the ability to consume ... Source: Goodwin, Kelly D. - Ocean Chemistry Division, Atlantic Oceanographic and Meteorological Laboratory....

492

Growth of Diamond from Atomic Hydrogen and a Supersonic Free Jet of Methyl Radicals  

Science Journals Connector (OSTI)

...18 January 1994 An in Vitro System for Adhesion and Fusion of Maize Gametes J.-E. Faure, C. Digonnet...male-female gamete pairs and results in 80 percent fusion, whereas fusions with other combinations of gametic and mesophyllic...

Szetsen Steven Lee; David W. Minsek; Daniel J. Vestyck; Peter Chen

1994-03-18T23:59:59.000Z

493

Contribution of Iron-Reducing Bacteria to Mercury Methylation in Marine Sediments  

E-Print Network (OSTI)

in continental margin sediments off central Chile. Limnologyof microbial iron reduction in sediments of the Baltic-Northreducing bacteria from sediments of an acid stressed lake.

Fleming, Emily J.; Nelson, D C

2006-01-01T23:59:59.000Z

494

Methanol and methyl fuel catalysts. Final technical report, September 1978-August 1980  

SciTech Connect

The Cu/ZnO methanol synthesis catalysts were investigated for (1) the role of additives such as alumina, ceria, and lanthana, (2) the effect of carbon dioxide in the H/sub 2//CO synthesis gas, (3) the chemisorption of hydrogen and carbon monoxide on the catalysts, and (4) the chemical poisoning of the catalysts by sulfur- and chlorine-containing compounds. Maximum activity and selectivity were obtained with a binary catalyst having a composition of Cu/ZnO = 30/70 metal atomic percent and with a synthesis gas of H/sub 2//CO/CO/sub 2/ = 70/28/2 volume percent in the absence of strongly reducing or strongly oxidizing chemical poisons. Both the binary and the ternary catalysts were fully characterized by scanning transmission electron microscopy (STEM), X-ray diffraction, electron spectroscopy, diffuse reflectance spectroscopy, and surface area-pore distribution measurements. Structural and morphologic information is presented in this report in detail for very active Cu/ZnO/Al/sub 2/O/sub 3/ catalysts prepared from acetates and for other catalysts in which the third component caused a loss of activity.

Klier, K.; Herman, R.G.

1980-12-15T23:59:59.000Z

495

Elucidating the Process of Activation of Methyl-Coenzyme M Reductase  

Science Journals Connector (OSTI)

...presented. INTRODUCTION The highest heat of combustion per mass unit (55.7 kJ/g) among all the hydrocarbons makes methane an important source...This decrease was probably due to heat instability of the enzyme. In...

Divya Prakash; Yonnie Wu; Sang-Jin Suh; Evert C. Duin

2014-04-25T23:59:59.000Z

496

DNA methylation dynamics, metabolic fluxes, gene splicing, and alternative phenotypes in honey bees  

Science Journals Connector (OSTI)

...manifested by the lack or presence of entire organs such as wax glands, or leg baskets in one caste. We compared a battery of several...Sequencing data were pro-cessed first by the Illumina Data Analysis Pipeline, and then bisulfite-converted sequencing reads were aligned...

Sylvain Foret; Robert Kucharski; Matteo Pellegrini; Suhua Feng; Steven E. Jacobsen; Gene E. Robinson; Ryszard Maleszka

2012-01-01T23:59:59.000Z

497

Production of low ash coal by thermal extraction with N-methyl-2-pyrrolidinone  

Science Journals Connector (OSTI)

Present study was conducted for the purpose of producing low ash coal from LRC (low rank coals) such as lignite and sub-bituminous coal through thermal extraction using polar solvent. Extraction from bituminous coal

Sang Do Kim; Kwang Jae Woo; Soon Kwan Jeong…

2008-07-01T23:59:59.000Z

498

Studying Nucleosome Positioning, DNA Methylation, and Other Epigenetic Factors Using Genomic Approaches  

E-Print Network (OSTI)

ecotypes, and 2 to 5% in F1 plants. Epimutation clusters arethe corresponding parental and F1 chromosomes. Results andNPB) and 93-11, as well as the F1 hybrids resulting from

Chodavarapu, Ramakrishna Kant

2012-01-01T23:59:59.000Z

499

Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide  

E-Print Network (OSTI)

Global sea-to-air flux climatology Ko, M. K. W. , Poulet,Global sea-to-air flux climatology Vogt, R. , Sander, R. ,sea-to-air flux climatology for bromoform, dibromomethane

2013-01-01T23:59:59.000Z

500

Discovery of Novel Targets for Aberrant Methylation in Pancreatic Carcinoma Using High-Throughput Microarrays  

Science Journals Connector (OSTI)

...Microarrays 1 Norihiro Sato Noriyoshi Fukushima Anirban Maitra Hiroyuki Matsubayashi...5-CTCTGTTTAGCACTGATAATG-3 (forward) and 5-TTTATTAGACTTGAGCTGATTC-3...5-CGGGAGATCAAGCAGAATG-3 (forward) and 5-AACGGCCTCGTTGTACTTG-3...61: 8540-8546, 2001. 5 Fukushima N., Sato N., Ueki T...

Norihiro Sato; Noriyoshi Fukushima; Anirban Maitra; Hiroyuki Matsubayashi; Charles J. Yeo; John L. Cameron; Ralph H. Hruban; and Michael Goggins

2003-07-01T23:59:59.000Z