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Note: This page contains sample records for the topic "butyl ether na" from the National Library of EnergyBeta (NLEBeta).
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1

Experimental Pathology Laboratories, Inc. Methyl-Tertiary-Butyl Ether  

E-Print Network [OSTI]

COORDINATOR'S REPORT FOR LIFETIME CARCINOGENICITY STUDY OF METHYL-TERTIARY-BUTYL ETHER (MTBE) IN SPRAGUE CARCINOGENICITY STUDY OF METHYL-TERTIARY-BUTYL ETHER (MTBE) IN SPRAGUE-DAWLEY RATS CONDUCTED AT THE CANCER

Baker, Chris I.

2

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.

3

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

4

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

E-Print Network [OSTI]

Methyl Tert-Butyl Ether (MTBE) in Groundwater P.I. names,Methyl tert-butyl ether (MTBE) is a contaminant of concernsubsurface environments. MTBE appears to be degraded readily

Scow, K M; MacKay, Douglas

2008-01-01T23:59:59.000Z

5

alkyl tert-butyl ether: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Fusarium solani CiteSeer Summary: Fusarium solani degraded methyl tert-butyl ether (MTBE) and other oxygenated compounds from gasoline including tert-butyl alcohol (TBA). The...

6

Treatment of Methyl tert-Butyl Ether Vapors in Biotrickling Filters. 2.  

E-Print Network [OSTI]

vapors of methyl tert-butyl ether (MTBE), a gasoline additive of great environmental concern MTBE treatment are discussed. Introduction The rapidly rising number of reports of groundwater con- taminated with the gasoline additive methyl tert-butyl ether (MTBE) has raised concerns about its

7

Atmospheric Methyl Tertiary Butyl Ether (MTBE) at a Rural Mountain Site in California  

E-Print Network [OSTI]

Atmospheric Methyl Tertiary Butyl Ether (MTBE) at a Rural Mountain Site in California Gunnar W. Schade,* Gabrielle B. Dreyfus, and Allen H. Goldstein ABSTRACT (CARB) measured MTBE in urban regions in 1995­ 1996, reporting a range of 0.4 to 13.2 ppbv in the LosMethyl tertiary butyl ether (MTBE

Cohen, Ronald C.

8

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

E-Print Network [OSTI]

Environmental Microbiology (2001) 3(6), 407±416 Methyl tert-butyl ether (MTBE) degradation of California, Riverside, Riverside, CA 92521, USA. Summary The widespread use of methyl tert-butyl ether (MTBE is often proposed as the most promising alter- native after treatment. However, MTBE biodegradation appears

9

Photoionization of methyl t-butyl ether (MTBE) and t-octyl methyl ether (TOME) and analysis of their pyrolyses by  

E-Print Network [OSTI]

Photoionization of methyl t-butyl ether (MTBE) and t-octyl methyl ether (TOME) and analysis 1999; accepted 20 July 1999 Abstract The pyrolysis products of neutral methyl-d3 t-butyl ether (MTBE-d3 from thermal cracking patterns. MTBE and TOME both exhibit base peaks at m/z 73 (which shifts to m/z 76

Morton, Thomas Hellman

10

Oxidation of methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE) by ozone and combined ozone/hydrogen peroxide  

SciTech Connect (OSTI)

The aim of this work was to study the reaction of ozone and combined ozone/hydrogen peroxide on oxygenated additives such as methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE) in dilute aqueous solution using controlled experimental conditions. Experiments conducted in a semi-continuous reactor with MTBE and ETBE in combination (initial concentration: 2 mmol/L of each) showed that ETBE was better eliminated than MTBE with both ozone and combined O[sub 3]/H[sub 2]O[sub 2]. batch experiments led to the determination of the ratio of the kinetic constants for the reaction of OH[degree]-radical with MTBE and ETBE (k[sub OH[degree]/ETBE]/k[sub OH[degree]//MTBE] = 1.7). Tert-butyl formate and tert-butyl acetate were identified as the ozonation byproducts of MTBE an ETBE, respectively, while tert-butyl alcohol was found to be produced during the ozonation of both compounds. 10 refs., 10 figs., 1 tab.

Leitner, N.K.V.; Papailhou, A.L.; Croue, J.P.; Dore, M. (Univ. de Poitiers (France)); Peyrot, J. (British Petroleum, Harfleur (France))

1994-01-01T23:59:59.000Z

11

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

12

Treatment of Methyl tert-Butyl Ether Contaminated Water Using a Dense  

E-Print Network [OSTI]

-butyl ether (MTBE) in a dense medium plasma (DMP) reactor utilizing gas chromatog- raphy-massspectrometryandgaschromatography-thermal conductivity techniques. A rate law is developed for the removal of MTBE from an aqueous solution in the DMP. The oxidation products from the treatment of MTBE-contaminated water in the DMP reactor were found

Dandy, David

13

Multiple steady states during reactive distillation of methyl tert-butyl ether  

SciTech Connect (OSTI)

This paper presents results of computer simulations of the synthesis of methyl tert-butyl ether (MTBE) in a fixed-bed reactor and in a reactive distillation column. These calculations clearly showed the advantages of MTBE synthesis in a catalytic distillation tower. Furthermore, the computer simulations showed that multiple steady states may occur in the reactive distillation column during MTBE synthesis in a broad range of operating conditions. An analysis of some sensitivity studies is presented.

Nijhuis, S.A. (Univ. of Amsterdam (Netherlands). Chemical Engineering Dept.); Kerkhof, F.P.J.M.; Mak, A.N.S. (Comprimo Engineers and Contractors, Amsterdam (Netherlands))

1993-11-01T23:59:59.000Z

14

Determination of methyl tert. butyl ether (MTBE) in gasoline  

SciTech Connect (OSTI)

A GLC-acid extraction method is described for the determination of MTBE in gasolines. The method consists of a programmed GLC analysis starting at about room temperature conducted before and after extraction with cold 85% phosphoric acid. This treatment results in the preferential solubility of ethers and other oxygenated compounds while minimizing the reaction of olefins and aromatics which may be present in the gasolines. Plotting various known concentrations of MTBE in gasolines against the concentrations determined in the same samples by the authors methodology results in a straight line relationship. The concentration of MTBE in any sample of gasoline may thus be determined using their GLC-extraction procedure and the calibration line. The analysis can accommodate a wide choice of standard GLC columns and programs. 2 refs., 1 fig., 1 tab.

Feldman, J.; Orchin, M. (Univ. of Cincinnati, OH (United States))

1993-02-01T23:59:59.000Z

15

Measurement of methyl-tert-butyl-ether (MTBE) in raw drinking water  

SciTech Connect (OSTI)

In order to assess the pathways for human exposure to methyl-tert-butyl-ether (MTBE) and to understand the extent of MTBE contamination in watersheds, a purge and trap gas chromatographic mass spectrometric method to measure part-per-trillion (ppt) concentrations of MTBE in environmental waters was developed. A variety of California's raw drinking waters were analyzed. No detectable MTBE was found in deep groundwater (>1000 feet). However shallow groundwater ({approx}250 feet) contained MTBE concentrations of non-detect to 1300 ppt. MTBE concentrations measured in rivers and lakes ranged from non-detect to 3500 ppt. East (San Francisco) Bay area rain water contained approximately 80 ppt MTBE.

Davisson, M L; Koester, C J; Moran, J E

1999-10-14T23:59:59.000Z

16

Review of the environmental behavior and fate of methyl tert-butyl ether  

SciTech Connect (OSTI)

A review of pertinent equations and current research indicates that when gasoline oxygenated with methyl tert-butyl ether (MTBE) comes into contact with water, large amounts of MTBe can dissolve. At 25 C, the water solubility of MTBE is about 5,000 mg/L for a gasoline that is 10% MTBE by weight, whereas for a nonoxygenated gasoline, the total hydrocarbon solubility in water is typically about 120 mg/L. Methyl tert-butyl ether sorbs only weakly to subsurface solids; therefore, sorption does not substantially retard the transport of MTBE by ground water. In addition, MTBE generally resists biodegradation in ground water. The half-life of MTBE in the atmosphere can be as short as 3 d in a regional airshed. In the air, MTBE tends to partition into atmospheric water, including precipitation. However, the washing out of gas-phase MTBE by precipitation will not, by itself, greatly alter the gas-phase concentration of the compound in the air. The partitioning of MTBE to precipitation can nevertheless result in concentrations as high as 3 {micro}g/L or more in urban precipitation and can contribute to the presence of MTBE in surface and ground water.

Squillace, P.J.; Zogorski, J.S. [Geological Survey, Rapid City, SD (United States); Pankow, J.F. [Oregon Graduate Inst. of Science and Technology, Beaverton, OR (United States). Dept. of Environmental Science and Engineering; Korte, N.E. [Oak Ridge National Lab., TN (United States). Environmental Science Div.

1997-09-01T23:59:59.000Z

17

Observation on the biodegradation and bioremediation potential of methyl t-butyl ether  

SciTech Connect (OSTI)

There have been few reports documenting evidence for the biodegradation of the fuel oxygenate alkyl ether, methyl t-butyl ether (MTBE) in groundwater, soils, and biosludges. Partial (or complete) microbial breakdown of MTBE has been observed in an anaerobic subsoil, a river sediment under methanogenic conditions, a cyclohexane-degrading bacterial consortium and a pure culture of the methylotroph, Methylisnus trichosporium OB3b. An aerobic bacterial enrichment (BC-1) isolated from an industrial transient (non-accumulating) metabolic intermediate. The studies suggest that MTBE is cleaved by BC-1 to TBA which is then metabolized via isopropanol and acetone. There is little information on the occurrence of indigenous MTBE-degraders in groundwater, soils and activated sludges. Preliminary evidence has been obtained, however, from a marketing terminal groundwater site that naturally-occurring MTBE-degraders are present in some monitoring wells. Microcosm experiments with groundwater from this aquifer show that MTBE is aerobically degraded (no TBA formed) with a first-order decay rate (0.31/day) similar to BTEX. Also, MTBE did not inhibit the intrinsic biodegradation potential of BTEX in groundwater microcosms. In summary, the data presented indicate that MTBE biodegradation has been observed in some environmental media. Further work is needed to assess the feasibility of using indigenous or derived aerobic and anaerobic MTBE-degrading cultures for treating fuel ethers in groundwaters or wastewater with in-situ or ex-situ bioremediation technologies.

Salanitro, J.; Wisniewski, H.; McAllister, P. [Shell Development Co., Houston, TX (United States)

1995-12-31T23:59:59.000Z

18

Treatment of methyl t-butyl ether contaminated water using a dense medium plasma reactor, a mechanistic and kinetic investigation  

E-Print Network [OSTI]

and oxidation mechanisms of methyl t-butyl ether (MTBE) in a dense medium plasma (DMP) reactor utilizing gas for the removal of MTBE from an aqueous solution in the DMP reactor. Rate constants are also derived for three reactor configurations and two pin array spin rates. The oxidation products from the treatment of MTBE

Dandy, David

19

Why methyl tert-butyl ether production by reactive distillation may yield multiple solutions  

SciTech Connect (OSTI)

This paper presents an explanation of why methyl tert-butyl ether (MTBE) production by reactive distillation may yield multiple solutions. Widely different composition profiles and conversions may, as already reported by Krishna and others, results with identical column specifications, depending on the initial estimates provided. A hypothesis yielding a qualitative understanding of this phenomenon has been developed. The inert n-butene plays a key role in the proposed explanation: As the reaction mixture is diluted with n-butene, the activity coefficient of methanol increases substantially and the temperature decreases. This dilution has a profound effect on the equilibrium conversion, enabling MTBE to escape from the reactive zone without decomposition. When methanol is fed below or in the lower part of the reactive zone of the column, the ``lifting capacity`` of the minimum boiling point MTBE-methanol azeotrope will also be important.

Hauan, S.; Hertzberg, T.; Lien, K.M. [Univ. of Trondheim (Norway)

1995-03-01T23:59:59.000Z

20

Acute toxicity of methyl-tertiary-butyl ether (MTBE) to aquatic organisms  

SciTech Connect (OSTI)

Due to the recent amendment of the Clean Air Act, oxygenates are now being added to gasolines to boost octane and reduce air pollution from combustion in heavily populated areas. Oxygenates such as alcohols (i.e. methanol) and ethers (methyl-tertiary-butyl ether, MTBE) are commonly being used. A series of bioassay studies have been conducted with MTBE, one of the most commonly used octane-enhancing additives. Freshwater and marine studies were conducted with fish, invertebrates and algae to determine the impact of this material on the environment following accidental spills. Static-renewal studies were run to ensure maintenance of MTBE, a highly volatile material in the test containers. Chemical confirmation of exposure concentrations demonstrated the adequacy of the exposure system. Mysid shrimp were highly sensitive to MTBE, with significantly less effect observed with the other species evaluated. These data have implications for spill response, particularly since MTBE is slow to biodegrade and will rapidly move through groundwater. Comparative data for other oxygenates will also be discussed.

BenKinney, M.T.; Barbieri, J.F.; Gross, J.S.; Naro, P.A. [Stonybrook Labs. Inc., Princeton, NJ (United States)

1994-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Exposure to methyl tert-butyl ether and benzene among service station attendants and operators  

SciTech Connect (OSTI)

Concerns for atmospheric pollution from auto exhaust have led to the blending of {open_quotes}oxygenates{close_quotes} with motor fuels. The most common oxygenate, methyl tert-butyl ether (MTBE) is currently required within several metropolitan areas (Denver and Phoenix) in the range of 12% of the motor fuel. Amendments to the Clean Air Act may expand this requirement to as many as 44 other areas of the United States in the near future. In consideration of the magnitude of potential uncontrolled exposures from its extensive use and a related concern involving the potential influence of MTBE blending on exposures to other constituents of gasoline (particularly benzene), an evaluation of exposures among service station attendants and operators was undertaken at the request, and in cooperation with, the American Petroleum Institute during the latter part of 1990. For application of the survey results to a broad audience, three categories or types of service stations were identified with regard to MTBE use and exposure potential: (a) service stations that do not use MTBE or use it only as an octane enhancer, (b) service stations with seasonal requirements to use 12-15% MTBE (the Denver, Colorado, and Phoenix, Arizona, metropolitan areas), and (c) service stations equipped with stage II (active) vapor recovery systems (several coastal areas, most notably Southern California). 4 refs., 4 tabs.

Hartle, R. [National Inst. for Occupational Safety and Health, Cincinnati, OH (United States)

1993-12-01T23:59:59.000Z

22

Toxicity of methyl tertiary butyl ether to Daphnia magna and photobacterium phosphoreum  

SciTech Connect (OSTI)

Methyl tertiary butyl ether (MTBE) is a liquid organic compound added to gasoline to increase its oxygen content and to reduce the emission of carbon monoxide during combustion in many urban areas. In order to meet the 1990 Clean Air Act amendments, gasoline must contain 2.7% oxygen (by weight) or 15% (by volume) of MTBE in gasoline to meet the regulations for the control of carbon monoxide emissions. Health effects caused by inhalation of MTBE include headaches, dizziness, irritated eyes and nausea; MTBE is one of cancer--causing chemicals. Intracaval injection of MTBE (0.2 mg/kg) caused the highest mortality (100%) in rats. General anesthetic effect induced by MTBE was found at or above 1200 mg/kg body weight; Rosenkranz and Klopman (1991) predicted that MTBE is neither a genotoxicant nor a carcinogen. Nevertheless, the safety of using MTBE in oxygenated fuels is now being questioned from its potential as groundwater pollutant. This study measures the toxicity of MTBE to Daphnia magna and Photobacterium phosphoreum. 13 refs.

Gupta, G.; Lin, Y.J. [Univ. of Maryland Eastern Shore, Princess Anne, MD (United States)

1995-10-01T23:59:59.000Z

23

Reaction calorimetry study of the liquid-phase synthesis of tert-butyl methyl ether  

SciTech Connect (OSTI)

The liquid-phase addition of methanol to isobutene to give tert-butyl methyl ether (MTBE) on the ion-exchange resin Lewatit K2631 has been studied in a calorimetric reactor. Heat capacity of MTBE and enthalpy of the MTBE synthesis reaction in the temperature range 312--333 K have been determined. MTBE heat capacity in the liquid phase has been found to obey the equation c[sub P] (J/mol[center dot]K) = 472.34 [minus] 2.468(T/K) + 0.005071(T/K)[sup 2]. At 298 K the standard molar reaction enthalpy is [Delta]H[degree] = [minus]33.8 kJ/mol. A method to estimate apparent activation energies from heat flow rate in a given reaction has been developed and proved to be valid for the MTBE synthesis. Using this method, an apparent activation energy of 91.1--95.2 kJ/mol is calculated. A [minus]3.8 kJ/mol value has been found for the adsorption enthalpy of methanol on the ion-exchange resin Lewatit K2631 by a combination of reaction calorimetry and thermogravimetry. This allows the calculation of an activation energy on the gel phase of the resin of 91 kJ/mol.

Sola, L.; Pericas, M.A.; Cunill, F.; Iborra, M. (Univ. de Barcelona (Spain). Dept. d'Enginyeria Quimica)

1994-11-01T23:59:59.000Z

24

Disposition, metabolism, and toxicity of methyl tertiary butyl ether, an oxygenate for reformulated gasoline  

SciTech Connect (OSTI)

Studies of the toxicology of methyl tertiary butyl ether (MTBE) were reviewed as a possible information base for evaluating the health effects of evaporative emissions from reformulated gasoline (RFG). Perirenal fat/blood MTBE concentration ratios ranged from 9.7 to 11.6 after 15 wk of intermittent exposure. During an oxyfuels program in Fairbanks, AK, blood levels of occupationally exposed workers were 0.2-31.5 {mu}g/L MTBE and 1.6 to 72.2 {mu}g/L TBA with a mean TBA:MTBE blood concentration ratio of 4.2. In patients who received MTBE by percutaneous, transhepatic puncture for the dissolution of cholesterol gallstones, concentrations of MTBE in fat tissue reached 60 and 300 {mu}g/g at a treatment time when mean blood MTBE was less than 20 {mu}g/ml. The results of laboratory and clinical studies indicate that metabolites of MTBE may contribute to the nephropathy, neoplasms, and other pathological changes associated with repeated exposure to MTBE in experimental animals. It is concluded that such studies can provide a well-defined database for quantitatitive safety comparisons and health risk-benefit analyses of MTBE and other oxygenates in RFG. 39 refs., 1 tab.

Hutcheon, D.E.; Hove, W. ten; Boyle, J. III [UMDNJ, New Jersey Medical Schook, Newark, NJ (United States)] [UMDNJ, New Jersey Medical Schook, Newark, NJ (United States); Arnold, J.D. [Arnold & Arnold, Inc., Kansas City, MO (United States)] [Arnold & Arnold, Inc., Kansas City, MO (United States)

1996-04-05T23:59:59.000Z

25

LIDEM unit for the production of methyl tert-butyl ether from butanes  

SciTech Connect (OSTI)

One of the basic problems in the production of motor fuels is how to obtain high-octane unleaded gasolines that will meet today`s ecological requirements. The term {open_quotes}reformulated gasolines{close_quotes} has come into general use throughout the world to denote fuels with a certain chemical composition. These gasolines consist of preselected components; as shown by worldwide experience, they must include oxygen-containing compounds that are distinguished by high octane numbers and low reactivities. Standards in effect in the United States, Japan, and certain Western European countries require that automotive gasolines must contain at least 2-4% by weight of oxygen-containing compounds (calculated as oxygen). In the last 15 years, in order to meet these requirements, production has been set up in various countries for the manufacture of high-octane oxygen-containing components known as oxygenates. The most common of these is methyl tert-butyl ether (MTBE), obtained by etherification of isobutene by methanol. Process technology developed by this last organization was used as the basis for constructing a unit in the Nizhnekamskneftekhim Production Association and at the Mazheikyai Petroleum Refinery in Lithuania. MTBE production has been held back mainly by a shortage of isobutene, which is obtained mainly from butane-butene cuts produced in cat crackers. In order to alleviate this shortage, it has been proposed that MTBE should be obtained from saturated C{sub 4} hydrocarbons that are recovered in processing oilfield associated gas, and also in the refinery from primary distillation units, catalytic reformers, and hydrocrackers. A working design was developed in 1991-1992 by Lengiproneftekhim for a basically new combination unit designed for the processing of saturated C{sub 4} hydrocarbons, which has been termed the LIDEM unit (Leningrad - isomerization - dehydrogenation - MTBE).

Rudin, M.G.; Zadvornov, M.A.

1994-09-01T23:59:59.000Z

26

Biodegradation of methyl tert-butyl ether by a bacterial pure culture  

SciTech Connect (OSTI)

A bacterial strain, PM1, which is able to utilize methyl tert-butyl ether (MTBE) as its sole carbon and energy source, was isolated from a mixed microbial consortium in a compost biofilter capable of degrading MTBE. Initial linear rates of MTBE degradation by 2 x 10{sup 6} cells ml{sup {minus}1} were 0.07, 1.17, and 3.56 {mu}g ml{sup {minus}1} h{sup {minus}1} for initial concentrations of 5, 50, and 500 {mu}g MTBE ml{sup {minus}1}, respectively. When incubated with 20 {mu}g of uniformly labeled [{sup 14}C]MTBE ml{sup {minus}1}, strain PM1 converted 46% to {sup 14}CO{sub 2} and 19% to {sup 14}C-labeled cells within 120 h. This yield is consistent with the measurement of protein accumulation at different MTBE concentrations from which was estimated a biomass yield of 0.18 of cells mg MTBE{sup {minus}1}. Strain PM1 was inoculated into sediment core material collected from a contaminated groundwater plume at Port Hueneme, California, in which there was no evidence of MTBE degradation. Strain PM1 readily degraded 20 {micro}g of MTBE ml{sup {minus}1} added to the core material. The rate of MTBE removal increased with additional inputs of 20 {micro}g of MTBE ml{sup {minus}1}. These results suggest that PM1 has potential for use in the remediation of MTBE-contaminated environments.

Hanson, J.R.; Ackerman, C.E.; Scow, K.M.

1999-11-01T23:59:59.000Z

27

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

28

Kinetics and modeling of mixture effects during complete catalytic oxidation of benzene and methyl tert-butyl ether  

SciTech Connect (OSTI)

The performance of a catalytic incinerator depends on the nature of the compounds being oxidized and cannot be predicted simply by knowing the performance of the incinerator with pure-component model compounds. Considering the importance of mixture effects, an attempt was made to develop a combined model to predict the conversion when benzene and methyl tert-butyl ether (MTBE) are simultaneously oxidized. Complete catalytic oxidation of benzene and MTBE, singly and in mixtures, was investigated over a platinum catalyst. No inhibition effects were seen with benzene, but MTBE conversion was distinctly inhibited by benzene. A Mars-van Krevelen rate model was used to explain the results. Model parameters were obtained from pure-component experiments and then incorporated into a multicomponent model without any adjustment or additional rate parameters. The multicomponent model was able to predict the conversion of benzene and MTBE oxidation in the binary mixture using the pure-component data without adjustable parameters.

Dangi, S.; Abraham, M.A. [Univ. of Tulsa, OK (United States). Dept. of Chemical Engineering] [Univ. of Tulsa, OK (United States). Dept. of Chemical Engineering

1997-06-01T23:59:59.000Z

29

Synthesis of octane enhancers during slurry-phase Fischer-Tropsch. [801Methyl tert-butyl ether  

SciTech Connect (OSTI)

The objective of this project is to investigate three possible routes to the formation of ethers, in particular methyl tert-butyl ether (MTBE), during slurry phase Fischer-Tropsch reaction. The three reaction schemes to be investigated are: (1) Addition of isobutylene during the formation of methanol and/or higher alcohols directly from CO and H{sub 2} during slurry-phase Fischer-Tropsch. (2) Addition of isobutylene to FT liquid products including alcohols in a slurry-phase reactor containing an MTBE or other acid catalyst. (3) Addition of methanol to slurry phase FT synthesis making iso-olefins. During the sixth quarter we completed the construction of the slurry bubble column reactor (SBCR), conducted initial shake-down experiments in a cold-flow mode, and finalized the selection process of the acid catalysts for conversion of syngas-produced alcohols and isobutylene to MTBE (scheme 2). Tasks 3, 4, and 5 are awaiting complete implementation of the SBCR system.

Marcelin, G.

1992-06-24T23:59:59.000Z

30

Alveolar breath sampling and analysis to assess exposures to methyl tertiary butyl ether (MTBE) during motor vehicle refueling  

SciTech Connect (OSTI)

In this study we present a sampling and analytical methodology that can be used to assess consumers` exposures to methyl tertiary butyl ether (MTBE) that may result from routine vehicle refueling operations. The method is based on the collection of alveolar breath samples using evacuated one-liter stainless steel canisters and analysis using a gas chromatograph-mass spectrometer equipped with a patented `valveless` cryogenic preconcentrator. To demonstrate the utility of this approach, a series of breath samples was collected from two individuals (the person pumping the fuel and a nearby observer) immediately before and for 64 min after a vehicle was refueled with premium grade gasoline. Results demonstrate low levels of MTBE in both subjects` breaths before refueling, and levels that increased by a factor of 35 to 100 after the exposure. Breath elimination models fitted to the post exposure measurements indicate that the half-life of MTBE in the first physiological compartment was between 1.3 and 2.9 min. Analysis of the resulting models suggests that breath elimination of MTBE during the 64 min monitoring period was approximately 155 {mu}g for the refueling subject while it was only 30 {mu}g for the nearby observer. This analysis also shows that the post exposure breath elimination of other gasoline constituents was consistent with previously published observations. 20 refs., 3 figs., 4 tabs.

Lindstrom, A.B.; Pleil, J.D. [U.S. Environmental Protection Agency, Research Triangle Park, NC (United States)

1996-07-01T23:59:59.000Z

31

Whole-genorne analysis of the methyl tert-butyl ether-degrading beta-proteobacterium Methylibium petroleiphilum PM1  

SciTech Connect (OSTI)

Methylibium petroleiphilum PM1 is a methylotroph distinguished by its ability to completely metabolize the fuel oxygenate methyl tert-butyl ether (MTBE). Strain PM1 also degrades aromatic (benzene, toluene, and xylene) and straight-chain (C, to C,,) hydrocarbons present in petroleum products. Whole-genome analysis of PM1 revealed an similar to 4-Mb circular chromosome and an similar to 600-kb megaplasmid, containing 3,831 and 646 genes, respectively. Aromatic hydrocarbon and alkane degradation, metal resistance, and methylotrophy are encoded on the chromosome. The megaplasmid contains an unusual t-RNA island, numerous insertion sequences, and large repeated elements, including a 40-kb region also present on the chromosome and a 29-kb tandem repeat encoding phosphonate transport and cobalamin biosynthesis. The megaplasmid also codes for alkane degradation and was shown to play an essential role in MTBE degradation through plasmid-curing experiments. Discrepancies between the insertion sequence element distribution patterns, the distributions of best BLASTP hits among major phylogenetic groups, and the G+C contents of the chromosome (69.2%) and plasmid (66%), together with comparative genome hybridization experiments, suggest that the plasmid was recently acquired and apparently carries the genetic information responsible for PM1's ability to degrade MTBE. Comparative genomic hybridization analysis with two PM1-like MTBE-degrading environmental isolates (similar to 99% identical 16S rRNA gene sequences) showed that the plasmid was highly conserved (ca. 99% identical), whereas the chromosomes were too diverse to conduct resequencing analysis. PM1's genome sequence provides a foundation for investigating MTBE biodegradation and exploring the genetic regulation of multiple biodegradation pathways in M. petroleiphilum and other MTBE-degrading beta-proteobacteria.

Kane, Staci R. [Lawrence Livermore National Laboratory (LLNL); Chakicherla, Anu Y. [Lawrence Livermore National Laboratory (LLNL); Chain, Patrick S. G. [Lawrence Livermore National Laboratory (LLNL); Schmidt, Radomir [University of California, Davis; Shin, M [U.S. Department of Energy, Joint Genome Institute; Legler, Tina C. [Lawrence Livermore National Laboratory (LLNL); Scow, Kate M. [University of California, Davis; Larimer, Frank W [ORNL; Lucas, Susan [Joint Genome Institute, Walnut Creek, California; Richardson, P M [U.S. Department of Energy, Joint Genome Institute; Hristova, Krassimira R. [University of California, Davis

2007-03-01T23:59:59.000Z

32

Exposure to methyl tert-butyl ether, benzene, and total hydrocarbons at the Singapore-Malaysia causeway immigration checkpoint  

SciTech Connect (OSTI)

The primary aim of this study was to determine the extent and levels of exposure to volatile organic compounds (VOCs) from automobile emissions in a group of immigration officers at a busy cross-border checkpoint. A majority (80%) of the workers monitored were exposed to benzene at levels between 0.01 and 0.5 ppm, with only 1.2% exceeding the current Occupational Safety and Health Administration occupational exposure limit of 1 ppm. The geometric mean (GM) concentrations of 8-hr time-weighted average exposure were 0.03 ppm, 0.9 ppm, and 2.46 ppm for methyl-tert-butyl ether (MTBE), benzene, and total hydrocarbons (THC), respectively. The highest time-weighted average concentrations measured were 1.05 ppm for MTBE, 2.01 ppm for benzene, and 34 ppm for THC. It was found that motorbikes emitted a more significant amount of pollutants compared with motor cars. On average, officers at the motorcycle booths were exposed to four to five times higher levels of VOCs (GMs of 0.07 ppm, 0.23 ppm, and 4.7 ppm for MTBE, benzene, and THC) than their counterparts at the motor car booths (GMs of 0.01 ppm, 0.05 ppm, and 1.5 ppm). The airborne concentrations of all three pollutants correlated with the flow of vehicle traffic. Close correlations were also noted for the concentrations in ambient air for the three pollutants measured. Benzene and MTBE had a correlation coefficient of 0.97. The overall findings showed that the concentrations of various VOCs were closely related to the traffic density, suggesting that they were from a common source, such as exhaust emissions from the vehicles. The results also indicated that although benzene, MTBE, and THC are known to be volatile, a significant amount could still be detected in the ambient environment, thus contributing to our exposure to these compounds. 4 refs., 6 figs.

Tan, C.; Ong, H.Y.; Kok, P.W. [and others

1996-12-31T23:59:59.000Z

33

Manipulation of the HIFVegf pathway rescues methyl tert-butyl ether (MTBE)-induced vascular lesions  

SciTech Connect (OSTI)

Methyl tert-butyl ether (MTBE) has been shown to be specifically anti-angiogenic in piscine and mammalian model systems at concentrations that appear non-toxic in other organ systems. The mechanism by which MTBE targets developing vascular structures is unknown. A global transcriptome analysis of zebrafish embryos developmentally exposed to 0.006255 mM MTBE suggested that hypoxia inducible factor (HIF)-regulated pathways were affected. HIF-driven angiogenesis via vascular endothelial growth factor (vegf) is essential to the developing vasculature of an embryo. Three rescue studies were designed to rescue MTBE-induced vascular lesions: pooled blood in the common cardinal vein (CCV), cranial hemorrhages (CH), and abnormal intersegmental vessels (ISV), and test the hypothesis that MTBE toxicity was HIFVegf dependent. First, zebrafish vegf-a over-expression via plasmid injection, resulted in significantly fewer CH and ISV lesions, 46 and 35% respectively, in embryos exposed to 10 mM MTBE. Then HIF degradation was inhibited in two ways. Chemical rescue by N-oxaloylglycine significantly reduced CCV and CH lesions by 30 and 32% in 10 mM exposed embryos, and ISV lesions were reduced 24% in 5 mM exposed zebrafish. Finally, a morpholino designed to knock-down ubiquitin associated von HippelLindau protein, significantly reduced CCV lesions by 35% in 10 mM exposed embryos. In addition, expression of some angiogenesis related genes altered by MTBE exposure were rescued. These studies demonstrated that MTBE vascular toxicity is mediated by a down regulation of HIFVegf driven angiogenesis. The selective toxicity of MTBE toward developing vasculature makes it a potentially useful chemical in the designing of new drugs or in elucidating roles for specific angiogenic proteins in future studies of vascular development. - Highlights: Global gene expression of MTBE exposed zebrafish suggested altered HIF1 signaling. Over expression of zebrafish vegf-a rescues MTBE-induced vascular lesions. Inhibiting PHD or knocking down VHL rescues MTBE-induced vascular lesions. HIF1-Vegf driven angiogenesis is a target for MTBE vascular toxicity.

Bonventre, Josephine A., E-mail: josephine.bonventre@oregonstate.edu [Rutgers, The State University of New Jersey, Joint Graduate Program in Toxicology, 170 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Rutgers, The State University of New Jersey, Department of Biochemistry and Microbiology, 76 Lipman Dr., New Brunswick, NJ 08901 (United States); Oregon State University, Department of Environmental and Molecular Toxicology, 1011 Agricultural and Life Sciences Bldg, Corvallis, OR 97331 (United States); Kung, Tiffany S., E-mail: tiffany.kung@rutgers.edu [Rutgers, The State University of New Jersey, Joint Graduate Program in Toxicology, 170 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Rutgers, The State University of New Jersey, Department of Biochemistry and Microbiology, 76 Lipman Dr., New Brunswick, NJ 08901 (United States); White, Lori A., E-mail: lawhite@aesop.rutgers.edu [Rutgers, The State University of New Jersey, Joint Graduate Program in Toxicology, 170 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Rutgers, The State University of New Jersey, Department of Biochemistry and Microbiology, 76 Lipman Dr., New Brunswick, NJ 08901 (United States); Cooper, Keith R., E-mail: cooper@aesop.rutgers.edu [Rutgers, The State University of New Jersey, Joint Graduate Program in Toxicology, 170 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Rutgers, The State University of New Jersey, Department of Biochemistry and Microbiology, 76 Lipman Dr., New Brunswick, NJ 08901 (United States)

2013-12-15T23:59:59.000Z

34

Kinetics and mechanism of the sonolytic destruction of methyl tert-butyl ether by ultrasonic irradiation in the presence of ozone  

SciTech Connect (OSTI)

The kinetics and mechanism of the sonolytic degradation of methyl tert-butyl ether (MTBE) have been investigated at an ultrasonic frequency of 205 kHz and power of 200 W L{sup {minus}1}. The observed first-order degradation rate constant for the loss of MTBE increased from 4.1 {times} 10{sup {minus}4} s{sup {minus}1} to 8.5 {times} 10{sup {minus}4} s{sup {minus}1} as the concentration of MTBE decreased from 1.0 to 0.01 mM. In the presence of O{sub 3}, the sonolytic rate of destruction of MTBE was accelerated substantially. The rate of MTBE sonolysis with ozone was enhanced by a factor of 1.5--3.9 depending on the initial concentration of MTBE. tert-Butyl formate, tert-butyl alcohol, methyl acetate, and acetone were found to be the primary intermediates and byproducts of the degradation reaction with yields of 8, 5, 3, and 12%, respectively. A reaction mechanism involving three parallel pathways that include the direct pyrolytic decomposition of MTBE, the direct reaction of MTBE with ozone, and the reaction of MTBE with hydroxyl radical is proposed.

Kang, J.W. [Yonsei Univ., Wonju (Korea, Republic of). Dept. of Industrial Environment and Health] [Yonsei Univ., Wonju (Korea, Republic of). Dept. of Industrial Environment and Health; Hoffmann, M.R. [California Inst. of Tech., Pasadena, CA (United States). W.M. Keck Labs.] [California Inst. of Tech., Pasadena, CA (United States). W.M. Keck Labs.

1998-10-15T23:59:59.000Z

35

alkyl-tert alkyl ethers: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

TREAT METHYL- TERT-BUTYL ETHER CONTAMINATED CiteSeer Summary: Methyl-tert-butyl ether (MTBE) is a commonly used gasoline additive. Leaking underground storage tank systems,...

36

Treatment of methyl tert-butyl ether vapors in a biotrickling filters. 2. Analysis of the rate-limiting step and behavior under transient conditions  

SciTech Connect (OSTI)

Detailed experiments were performed with gas phase biotrickling filters treating vapors of methyl tert-butyl ether (MTBE), a gasoline additive of great environmental concern. A particular emphasis was placed on the analysis of the rate-limiting step, and it was found that the process was mostly limited by the biological reaction rather than by mass transfer. Further experiments involved the study of the dynamic behavior of the biotrickling filters under simulated field conditions. In all cases, the biotrickling filters adapted rapidly to the new conditions, and new steady states were obtained within hours. The relevance of the results and the implications as far as implementation of biotrickling filters for field MTBE treatment are discussed.

Fortin, N.Y.; Deshusses, M.A. [Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering] [Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering

1999-09-01T23:59:59.000Z

37

Cytotoxic and DNA-damaging effects of methyl tert-butyl ether and its metabolites on HL-60 cells in vitro  

SciTech Connect (OSTI)

Methyl tert-butyl ether (MTBE) is a widely used oxygenate in unleaded gasoline; however, few studies have been conducted on the toxicity of this compound. This study evaluates the cytotoxic and DNA-damaging effects of MTBE and its metabolites in a human haemopoietic cell line, HL-60. The metabolites of MTBE studied include tertiary butyl alcohol (TBA), {alpha}-hydroxyisobutyric acid (HIBA), and formaldehyde. Comet assay is used to assess DNA damage, and the cytotoxicity is investigated by lactate dehydrogenease (LDH) release. The results show no significant cytotoxic effects of MTBE, TBA, and HIBA over a concentration ranging from 1 to 30 mM. Formaldehyde, in contrast, causes a substantial LDH release at a concentration of 5 {mu}M. Hydrogen peroxide, a known oxidative agent, at concentrations ranging from 10 to 100 {mu}M, produces a significant dose-related increase in DNA damage, whereas a much higher concentration of MTBE (1 to 30 mM) is required to produce a similar observation. The genotoxic effects of TBA and HIBA appear to be identical to that of MTBE. Conversely, DNA damage is observed for formaldehyde at a relatively low concentration range (5 to 100 {mu}M). These findings suggest that MTBE and its metabolites, except formaldehyde, have relatively low cytotoxic and genotoxic effects. 16 refs., 4 figs.

Tang, G.H. [Xian Medical Univ. (China); Shen, Y.; Shen, H.M. [National Univ. of Singapore (Singapore)] [and others

1996-12-31T23:59:59.000Z

38

Determination of Methyl tert-Butyl Ether and tert-Butyl Alcohol in Water by Solid-Phase Microextraction/Head Space Analysis in Comparison to EPA Method 5030/8260B  

SciTech Connect (OSTI)

Methyl tert-butyl ether (MTBE) is now one of the most common groundwater contaminants in the United States. Groundwater contaminated with MTBE is also likely to be contaminated with tert-butyl alcohol (TBA), because TBA is a component of commercial grade MTBE, TBA can also be used as a fuel oxygenate, and TBA is a biodegradation product of MTBE. In California, MTBE is subject to reporting at concentrations greater than 3 {micro}g/L. TBA is classified as a ''contaminant of current interest'' and has a drinking water action level of 12 {micro}g/L. In this paper, we describe the development and optimization of a simple, automated solid phase microextraction (SPME) method for the analysis of MTBE and TBA in water and demonstrate the applicability of this method for monitoring MTBE and TBA contamination in groundwater, drinking water, and surface water. In this method, the headspace (HS) of a water sample is extracted with a carboxen/polydimethylsiloxane SPME fiber, the MTBE and TBA are desorbed into a gas chromatograph (GC), and detected using mass spectrometry (MS). The method is optimized for the routine analysis of MTBE and TBA with a level of quantitation of 0.3 {micro}g/L and 4 {micro}g/L, respectively, in water. MTBE quantitation was linear for over two orders of concentration (0.3 {micro}g/L -80 {micro}g/L). TBA was found to be linear within the range of 4 {micro}g/L-7,900 {micro}g/L. The lower level of detection for MTBE is 0.03 {micro}g/L using this method. This SPME method using headspace extraction was found to be advantageous over SPME methods requiring immersion of the fiber into the water samples, because it prolonged the life of the fiber by up to 400 sample analyses. This is the first time headspace extraction SPME has been shown to be applicable to the measurement of both MTBE and TBA at concentrations below regulatory action levels. This method was compared with the certified EPA Method 5030/8260B (purge-and-trap/GC/MS) using split samples from laboratory bioreactors treating MTBE contaminated water and applied to environmental samples collected throughout the East Bay area of California. Results from the SPME-HS/GC/MS method were directly comparable to the EPA Method 5030/8260B. This method provides an simple, inexpensive, accurate, and sensitive alternative to EPA Method 5030/8260B for the analysis of MTBE and TBA in water samples.

Oh, Keun-Chan; Stringfellow, William T.

2003-10-02T23:59:59.000Z

39

Treatment of methyl tert-butyl ether vapors in biotrickling filters. 1. Reactor startup, steady-state performance, and culture characteristics  

SciTech Connect (OSTI)

An aerobic microbial consortium able to biodegrade methyl tert-butyl ether (MTBE) was enriched in two waste air biotrickling filters after continuous operation for 6 months. After this acclimation phase, the two laboratory-scale biotrickling filters were able to degrade up to 50 g of MTBE per cubic meter of reactor per hour, a value comparable to other gasoline constituents. Such high performance could be sustained for at least 4--6 weeks. After the acclimation phase, the MTBE degrading biotrickling filters were characterized by their almost full conversion of MTBE to carbon dioxide and the absence of any degradation byproducts in either the gas or the liquid phase. They also exhibited a very high specific degradation activity per amount of biomass, and a low rate of biomass accumulation. An observed biomass yield of 0.1 g g{sup {minus}1} and a specific growth rate of 0.025 day{sup {minus}1} were determined for the biotrickling filter process culture. Further data on MTBE mass transfer and on the dynamic behavior of the biotrickling filter are presented in part 2 of this paper. Overall, the results demonstrate that MTBE can be effectively biodegraded under carefully controlled environmental conditions.

Fortin, N.Y.; Deshusses, M.A. [Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering] [Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering

1999-09-01T23:59:59.000Z

40

Effect of Ethanol and Methyl-tert-Butyl Ether on Monoaromatic Hydrocarbon Biodegradation: Response Variability for Different Aquifer Materials Under Various Electron-Accepting Conditions  

SciTech Connect (OSTI)

Aquifer microcosms were used to determine how ethanol and methyl-tert-butyl ether (MtBE) affect monoaromatic hydrocarbon degradation under different electron-accepting conditions commonly found in contaminated sites experiencing natural attenuation. Response variability was investigated by using aquifer material from four sites with different exposure history. The lag phase prior to BTEX (benzene, toluene, ethylbenzene, and xylenes) and ethanol degradation was typically shorter in microcosms with previously contaminated aquifer material, although previous exposure did not always result in high degradation activity. Toluene was degraded in all aquifer materials and generally under a broader range of electron-accepting conditions compared to benzene, which was degraded only under aerobic conditions. MtBE was not degraded within 100 days under any condition, and it did not affect BTEX or ethanol degradation patterns. Ethanol was often degraded before BTEX compounds, and had a variable effect on BTEX degradation as a function of electron-accepting conditions and aquifer material source. An occasional enhancement of toluene degradation by ethanol occurred in denitrifying microcosms with unlimited nitrate; this may be attributable to the fortuitous growth of toluene-degrading bacteria during ethanol degradation. Nevertheless, experiments with flow-through aquifer columns showed that this beneficial effect could be eclipsed by an ethanol-driven depletion of electron acceptors, which significantly inhibited BTEX degradation and is probably the most important mechanism by which ethanol could hinder BTEX natural attenuation. A decrease in natural attenuation could increase the likelihood that BTEX compounds reach a receptor as well as the potential duration of exposure.

Ruiz-Aguilar, G L; Fernandez-Sanchez, J M; Kane, S R; Kim, D; Alvarez, P J

2003-10-06T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

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]

diethyl ether (DEE) in ethanol fuel blends for a range ofbio-derived fuel components (ethanol) in emission productsHCCI Combustion of Fuel Blends of Ethanol and Diethyl Ether

Mack, John Hunter; Buchholz, Bruce A; Flowers, Daniel L; Dibble, Robert W

2005-01-01T23:59:59.000Z

42

antioxidant butylated hydroxytoluene: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Fusarium solani CiteSeer Summary: Fusarium solani degraded methyl tert-butyl ether (MTBE) and other oxygenated compounds from gasoline including tert-butyl alcohol (TBA). The...

43

Sonolytic destruction of methyl tert-butyl ether by ultrasonic irradiation: The role of O{sub 3}, H{sub 2}O{sub 2}, frequency, and power density  

SciTech Connect (OSTI)

The kinetics of degradation of methyl tert-butyl ether (MTBE) by ultrasonic irradiation in the presence of ozone as functions of applied frequencies and applied power are investigated. Experiments are performed over the frequency range of 205--1,078 kHz. The higher overall reaction rates are observed at 358 and 618 kHz and then at 205 and 1,078 kHz. The observed pseudo-first-order rate constant, k{sub 0}, for MTBE degradation increases with increasing power density up to 250 W L{sup {minus}1}. A linear dependence of the first-order rate constant, k{sub O{sub 3}}, for the simultaneous degradation of O{sub 3} on power density is also observed. Naturally occurring organic matter (NOM) is shown to have a negligible effect on observed reaction rates.

Kang, J.W.; Hung, H.M.; Lin, A.; Hoffmann, M.R. [California Inst. of Tech., Pasadena, CA (United States). W.M. Keck Labs.] [California Inst. of Tech., Pasadena, CA (United States). W.M. Keck Labs.

1999-09-15T23:59:59.000Z

44

active methyl tert-butyl: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Fusarium solani CiteSeer Summary: Fusarium solani degraded methyl tert-butyl ether (MTBE) and other oxygenated compounds from gasoline including tert-butyl alcohol (TBA). The...

45

{gamma}-aminobutyric acid{sub A} (GABA{sub A}) receptor regulates ERK1/2 phosphorylation in rat hippocampus in high doses of Methyl Tert-Butyl Ether (MTBE)-induced impairment of spatial memory  

SciTech Connect (OSTI)

Experimental and occupational exposure to Methyl Tert-Butyl Ether (MTBE) has been reported to induce neurotoxicological and neurobehavioral effects, such as headache, nausea, dizziness, and disorientation, etc. However, the molecular mechanisms involved in MTBE-induced neurotoxicity are still not well understood. In the present study, we investigated the effects of MTBE on spatial memory and the expression and function of GABA{sub A} receptor in the hippocampus. Our results demonstrated that intraventricular injection of MTBE impaired the performance of the rats in a Morris water maze task, and significantly increased the expression of GABA{sub A} receptor {alpha}1 subunit in the hippocampus. The phosphorylation of ERK1/2 decreased after the MTBE injection. Furthermore, the decreased ability of learning and the reduction of phosphorylated ERK1/2 level of the MTBE-treated rats was partly reversed by bicuculline injected 30 min before the training. These results suggested that MTBE exposure could result in impaired spatial memory. GABA{sub A} receptor may play an important role in the MTBE-induced impairment of learning and memory by regulating the phosphorylation of ERK in the hippocampus.

Zheng Gang; Zhang Wenbin [Department of Occupational and Environmental Health, School of Public Health and Military Preventive Medicine, Fourth Military Medical University, Xi'an 710032 (China); Zhang Yun [465 Hospital, Jilin Medical College, Jilin 132001 (China); Chen Yaoming; Liu Mingchao; Yao Ting; Yang Yanxia; Zhao Fang [Department of Occupational and Environmental Health, School of Public Health and Military Preventive Medicine, Fourth Military Medical University, Xi'an 710032 (China); Li Jingxia; Huang Chuanshu [Nelson Institute of Environmental Medicine, New York University School of Medicine, Tuxedo, New York 10987 (United States); Luo Wenjing [Department of Occupational and Environmental Health, School of Public Health and Military Preventive Medicine, Fourth Military Medical University, Xi'an 710032 (China)], E-mail: luowenj@fmmu.edu.cn; Chen Jingyuan [Department of Occupational and Environmental Health, School of Public Health and Military Preventive Medicine, Fourth Military Medical University, Xi'an 710032 (China)], E-mail: jy_chen@fmmu.edu.cn

2009-04-15T23:59:59.000Z

46

Mode of action of ethyl tertiary-butyl ether hepatotumorigenicity in the rat: Evidence for a role of oxidative stress via activation of CAR, PXR and PPAR signaling pathways  

SciTech Connect (OSTI)

To elucidate possible mode of action (MOA) and human relevance of hepatotumorigenicity in rats for ethyl tertiary-butyl ether (ETBE), male F344 rats were administered ETBE at doses of 0, 150 and 1000 mg/kg body weight twice a day by gavage for 1 and 2 weeks. For comparison, non-genotoxic carcinogen phenobarbital (PB) was applied at a dose of 500 ppm in diet. Significant increase of P450 total content and hydroxyl radical levels by low, high doses of ETBE and PB treatments at weeks 1 and 2, and 8-OHdG formation at week 2, accompanied accumulation of CYP2B1/2B2, CYP3A1/3A2 and CYP2C6, and downregulation of DNA oxoguanine glycosylase 1, induction of apoptosis and cell cycle arrest in hepatocytes, respectively. Up-regulation of CYP2E1 and CYP1A1 at weeks 1 and 2, and peroxisome proliferation at week 2 were found in high dose ETBE group. Results of proteome analysis predicted activation of upstream regulators of gene expression altered by ETBE including constitutive androstane receptor (CAR), pregnane-X-receptor (PXR) and peroxisome proliferator-activated receptors (PPARs). These results indicate that the MOA of ETBE hepatotumorigenicity in rats may be related to induction of oxidative stress, 8-OHdG formation, subsequent cell cycle arrest, and apoptosis, suggesting regenerative cell proliferation after week 2, predominantly via activation of CAR and PXR nuclear receptors by a mechanism similar to that of PB, and differentially by activation of PPARs. The MOA for ETBE hepatotumorigenicity in rats is unlikely to be relevant to humans. - Highlights: We focus on MOA and human relevance of hepatotumorigenicity in rats for ETBE. ETBE was administered to F344 rats for 1 and 2 weeks. Oxidative stress formation, proliferation and apoptosis in the liver are analyzed. ETBE-induced changes of gene and protein expression in the liver are examined. The effects are compared with those induced by non-genotoxic carcinogen PB.

Kakehashi, Anna, E-mail: anna@med.osaka-cu.ac.jp [Department of Pathology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585 (Japan); Hagiwara, Akihiro; Imai, Norio [DIMS Institute of Medical Science, Inc., 64 Goura, Nishiazai, Azai-cho, Ichinomiya, Aichi 491-0113 (Japan); Nagano, Kasuke [Nagano Toxicologic-Pathology Consulting, Ochiai, Hadano, Kanagawa 257-0025 (Japan); Nishimaki, Fukumi [Biofuel Assessment Group, New Fuels Dept., Japan Petroleum Energy Center (JPEC), 4-3-9 Toranomon, Minato-ku, Tokyo 105-0001 (Japan); Banton, Marcy [Toxicology and Risk Assessment, LyondellBasell Industries, LyondellBasell Corporate HSE/Product Safety, One Houston Center, Suite 700, 1221 McKinney Street, Houston, TX 770 10 (United States); Wei, Min [Department of Pathology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585 (Japan); Fukushima, Shoji [Department of Pathology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585 (Japan); Japan Bioassay Research Center, Japan Industrial Safety and Health Association, 2445 Hirasawa, Hadano, Kanagawa 257-0011 (Japan); Wanibuchi, Hideki [Department of Pathology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585 (Japan)

2013-12-01T23:59:59.000Z

47

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (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...

48

Production of methyl tert-alkyl ethers  

SciTech Connect (OSTI)

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

49

SYNTHESIS OF NOVEL CROWN ETHERS BEARING THE exo-cis-2,3-NORBORNYL GROUP AS POTENTIAL Na+ AND K+ EXTRACTANTS  

SciTech Connect (OSTI)

The synthesis of a series of novel dinorbornyl-16-crown-5 and dinorbornyl-18-crown-6 ethers that incorporate the exo-cis-2,3-norbornyl moiety within the macrocycle framework is described. The key starting material for the crown ethers, exo-cis-2,3-norbornanediol, was successfully prepared on a large (>30g) scale in 88% yield from norbornylene by osmium tetroxide-catalyzed hydroxylation. The syn and anti isomers of the dinorbornyl-16-crown-5 ether family were prepared using diethylene glycol with ring closure achieved using a methallyl linkage. The isomers cis-syn-cis and cis-anti-cis di-norbornano-15-methyleno-16-crown-5 (6A and 6B) could be separated using column chromatography, and a single crystal of the syn isomer 6A suitable for X-ray crystal structure analysis was obtained, thereby confi rming the syn orientation. The syn and anti isomers of the dinorbornyl-18-crown-6 ether family were successfully prepared employing a different synthetic strategy, involving the potassiumtemplated cyclization of two bis-hydroxyethoxy-substituted exo-cis-2,3-norbornyl groups under high dilution conditions. Attempts to fully separate cis-syn-cis di-norbornano-18-crown-6 (10A) and cis-anti-cis di-norbornano-18-crown-6 (10B) from one another using column chromatography were unsuccessful. All intermediates and products were checked for purity using either thin layer chromatography or gas chromatography, and characterized by proton and carbon NMR. Crown ethers 6AB and 10AB are to our knowledge the fi rst crown ethers to incorporate the exo-cis-2,3-norbornyl moiety into the crown ring to be successfully synthesized and characterized.

Robeson, R.M.; Bonnesen, P.

2007-01-01T23:59:59.000Z

50

Radiation chemistry of alternative fuel oxygenates -- Substituted ethers  

SciTech Connect (OSTI)

The electron beam process, an advanced oxidation and reduction technology, is based in the field of radiation chemistry. Fundamental to the development of treatment processes is an understanding of the underlying chemistry. The authors have previously evaluated the bimolecular rate constants for the reactions of methyl tert-butyl ether (MTBE) and with this study have extended their studies to include ethyl tert-butyl ether (ETBE), di-isopropyl ether (DIPE) and tert-amyl methyl ether (TAME) with the hydroxyl radical, hydrogen atom and solvated electron using pulse radiolysis. For all of the oxygenates the reaction with the hydroxyl radical appears to be of primary interest in the destruction of the compounds in water. The rates with the solvated electron are limiting values as the rates appear to be relatively low. The hydrogen atom rate constants are relatively low, coupled with the low yield in radiolysis, they concluded that these are of little significance in the destruction of the alternative fuel oxygenates (and MTBE).

Mezyk, S. P.; Cooper, W. J.; Bartels, D. M.; Tobien, T.; O'Shea, K. E.

1999-11-15T23:59:59.000Z

51

High octane ethers from synthesis gas-derived alcohols  

SciTech Connect (OSTI)

The objective of the proposed research is to synthesize high octane ethers, primarily methyl isobutyl ether (MIBE) and methyl tertiary butyl ether (MTBE), directly from H[sub 2]/CO/CO[sub 2] coal-derived synthesis gas via alcohol mixtures that are rich in methanol and 2-methyl-l-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 demonstrated by us to occur over superacid catalysts to yield methyl isobutyl ether (MIBE) at moderate pressures and a mixture of methanol and isobutene at low pressures. MIBE is an isomer of MTBE and a process is proposed whereby MTBE from the two alcohols is maximized and MIBE is minimized. This will be achieved by the proper choice of reaction conditions, i.e. intermediate pressures, and of inorganic acid catalysts that are stable at temperatures higher than 200[degree]C, at which the carbonium ion reaction coupling of the two alcohols to MTBE is more effective than the oxonium ion or ester reaction coupling to MIBE. Both organic and inorganic catalysts will be investigated, and the better catalysts of these classes will be subjected to long term performance studies. The long term performance studies of the combined process will extend to 1000 hr and detailed analytical data for all products will be provided.

Klier, K.; Herman, R.G.; Feeley, O.C.; Johansson, M.A.

1992-07-01T23:59:59.000Z

52

Aerobic mineralization of MTBE and tert-butyl alcohol by stream-bed sediment microorganisms  

SciTech Connect (OSTI)

Microorganisms indigenous to the stream-bed sediments at two gasoline-contaminated groundwater sites demonstrated significant mineralization of the fuel oxygenates, methyl tert-butyl ether (MTBE) and tert-butyl alcohol (TBA). Up to 73% of [U-{sup 14}C]-MTBE and 84% of [U-{sup 14}C]-TBA were degraded to {sup 14}CO{sub 2} under mixed aerobic/anaerobic conditions. No significant mineralization was observed under strictly anaerobic conditions. The results indicate that, under the mixed aerobic/anaerobic conditions characteristic of stream-bed sediments, microbial processes may provide a significant environmental sink for MTBE and TBA delivered to surface water bodies by contaminated groundwater or by other sources.

Bradley, P.M.; Landmeyer, J.E.; Chapelle, F.H. [Geological Survey, Columbia, SC (United States)] [Geological Survey, Columbia, SC (United States)

1999-06-01T23:59:59.000Z

53

Propenyl ether monomers for photopolymerization  

DOE Patents [OSTI]

Propenyl ether monomers of formula A(OCH{double_bond}CHCH{sub 3}){sub n} wherein n is an integer from one to six and A is selected from cyclic ethers, polyether and alkanes are disclosed. The monomers are readily polymerized in the presence of cationic photoinitiators, when exposed to actinic radiation, to form poly(propenyl ethers) that are useful for coatings, sealants, varnishes and adhesives. Compositions for preparing polymeric coatings comprising the compounds of the above formula together with particular cationic photoinitiators are also disclosed, as are processes for making the monomers from allyl halides and readily available alcohols. The process involves rearranging the resulting allyl ethers to propenyl ethers.

Crivello, J.V.

1996-10-22T23:59:59.000Z

54

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

55

Biodegradation of methyl tertiary butyl ether (MTBE) using a granular activated carbon trickling filter  

SciTech Connect (OSTI)

A pilot scale trickling filter was constructed using granular activated carbon (GAC) as the packing medium and inoculated with a microbial culture known to degrade MTBE. The packing dimensions were 0.076 m in diameter and 0.22 m deep. The unit operated with recycling flow for two months before a biofilm was observed on the GAC. After two additional months the biofilm had visibly spread throughout the packing. A few pieces of GAC were placed in a sealed bottle with MTBE-contaminated water and nutrients. Headspace analysis performed over 14 days confirmed that MTBE degradation was occurring. The trickling filter was converted to continuous flow and operated for one month at a nominal flow rate of 0.1 L/min and a hydraulic loading rate of 32 m{sup 3}/m{sup 2}-d. Samples were collected for analysis at the spray nozzle and at the bottom of the trickling filter. Fractional removal varied with influent MTBE concentration, temperature and liquid flow rate. Percent MTBE removal was as high as 85%. A mechanical failure resulted in the trickling filter bed drying and percent removal dropping to less than 1 percent. However, the system recovered within five days.

Converse, B.M.; Schroeder, E.D.; Chang, D.P.Y.

1999-07-01T23:59:59.000Z

56

High octane ethers from synthesis gas-derived alcohols. Quarterly technical progress report, April--June 1992  

SciTech Connect (OSTI)

The objective of the proposed research is to synthesize high octane ethers, primarily methyl isobutyl ether (MIBE) and methyl tertiary butyl ether (MTBE), directly from H{sub 2}/CO/CO{sub 2} coal-derived synthesis gas via alcohol mixtures that are rich in methanol and 2-methyl-l-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 demonstrated by us to occur over superacid catalysts to yield methyl isobutyl ether (MIBE) at moderate pressures and a mixture of methanol and isobutene at low pressures. MIBE is an isomer of MTBE and a process is proposed whereby MTBE from the two alcohols is maximized and MIBE is minimized. This will be achieved by the proper choice of reaction conditions, i.e. intermediate pressures, and of inorganic acid catalysts that are stable at temperatures higher than 200{degree}C, at which the carbonium ion reaction coupling of the two alcohols to MTBE is more effective than the oxonium ion or ester reaction coupling to MIBE. Both organic and inorganic catalysts will be investigated, and the better catalysts of these classes will be subjected to long term performance studies. The long term performance studies of the combined process will extend to 1000 hr and detailed analytical data for all products will be provided.

Klier, K.; Herman, R.G.; Feeley, O.C.; Johansson, M.A.

1992-07-01T23:59:59.000Z

57

E-Print Network 3.0 - ammoniated glycyrrhizin butylated Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ammoniated glycyrrhizin butylated Search Powered by Explorit Topic List Advanced Search Sample search results for: ammoniated glycyrrhizin butylated Page: << < 1 2 3 4 5 > >> 1...

58

Kinetics and mechanism of the thermal dissociation of O,O'-bis(1,3,5-TRI-tert-butyl-4-oxo-2,5-cyclo-hexadienyl)-p-benzoquinone dioxime in solution  

SciTech Connect (OSTI)

The kinetics and mechanism of the thermal dissociation of O,O'-bis(1,3,5-tri-tert-butyl-4-oxo-2,5-cyclohexadienyl)-p-benzoquinone dioxime (quinol ether) in solutions in nonpolar solvents were investigated. The dissociation of the quinol ether is reversible two-stage process and involves the formation of an intermediate radical. In relation to the reaction conditions (initial concentration, temperature) the dissociation rate of the quinol ether obeys the kinetic equations omega = k/sub eff/ x c/sup 1/2/ or omega = k/sub 1/c. The change in the reaction order is due to the ratio of the rates of dissociation of the intermediate radical and of its reaction with the phenoxyl radical. The ESR spectra were recorded on a Varian E-9 radiospectrometer with high-frequency modulation of 100 kHz.

Khizhnyi, V.A.; Danilova, T.A.; Goloverda, G.Z.; Dobronravova, Z.A.

1987-09-20T23:59:59.000Z

59

Aza crown ether compounds as anion receptors  

DOE Patents [OSTI]

A family of aza-ether based compounds including linear, multi-branched and aza-crown ethers is provided. When added to non-aqueous battery electrolytes, the new family of aza-ether based compounds acts as neutral receptors to complex the anion moiety of the electrolyte salt thereby increasing the conductivity and the transference number of LI{sup +} ion in alkali metal batteries. 3 figs.

Lee, H.S.; Yang, X.O.; McBreen, J.

1998-08-04T23:59:59.000Z

60

Near-Infrared Electrochromism in Electroactive Pentacenediquinone-Containing Poly(aryl ether)s  

E-Print Network [OSTI]

Near-Infrared Electrochromism in Electroactive Pentacenediquinone-Containing Poly(aryl etherVed October 21, 2005 The synthesis and near-infrared electrochromic properties of pentacenediquinone-infrared electrochromic properties of pentacenediquinone-containing poly(aryl ether)s were studied

Wan, Xin-hua

Note: This page contains sample records for the topic "butyl ether na" 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

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

62

A thermodynamic model of nitric acid extraction by tri-n-butyl phosphate  

SciTech Connect (OSTI)

A thermodynamic model is presented for nitric acid extraction by tri-n-butyl phosphate (TBP). This model is based on the formation of the organic phase species: TBP.HNO/sub 3/ and (TBP)/sub 2/.HNO/sub 3/. The model works successfully at TBP concentrations of 5 to 100 vol% and was found to be effective at predicting the extraction of HNO/sub 3/ from HNO/sub 3//NaNO/sub 3/ and HNO/sub 3//LiNO/sub 3/ solutions. Within the TBP concentration range of 5 to 30%, a single set of extraction constants was sufficient to fit extraction data. Stoichiometric activity coefficients of nitric acid in HNO/sub 3//NaNO/sub 3/ and HNO/sub 3//LiNO/sub 3/ mixtures were calculated using a model developed by Bromley.

Chaiko, D.J.; Vandegrift, G.F.

1988-07-01T23:59:59.000Z

63

Crown Ethers in Graphene Bring Strong, Selective Binding | ornl...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Materials Characterization Crown Ethers in Graphene Bring Strong, Selective Binding November 14, 2014 Schematic showing a graphene sheet containing an array of ideal crown ethers....

64

Ethers have good gasoline-blending attributes  

SciTech Connect (OSTI)

Because of their compatibility with hydrocarbon gasoline-blending components, their high octane blending values, and their low volatility blending values, ethers will grow in use as gasoline blending components. This article discusses the properties of ethers as blending components, and environmental questions.

Unzelman, G.H.

1989-04-10T23:59:59.000Z

65

Purification of aqueous cellulose ethers  

SciTech Connect (OSTI)

Manufacture of cellulose ethers usually involves high amounts of salt by-products. For application of the product, salt must be removed. In this work, we have studied the injection of high-pressure CO{sub 2} into an aqueous polymer-salt solution; we find that upon addition of isopropanol in addition to CO{sub 2}, the solution separates into two phases. One phase is rich in polymer and water, and the other phase contains mostly isopropanol, water and CO{sub 2}. The salt distributes between the two phases, thereby offering interesting possibilities for development of a new purification process for water-soluble polymers. This work presents experimental phase-equilibrium data for hydroxyethyl cellulose and sodium carboxymethyl cellulose with sodium acetate and potassium sulfate, respectively, in the region 40{degree}C and 30 to 80 bar. Based on these data, we suggest a process for the manufacture and purification of water-soluble cellulose ethers. 15 refs., 14 figs., 9 tabs.

Bartscherer, K.A.; de Pablo, J.J.; Bonnin, M.C.; Prausnitz, J.M.

1990-07-01T23:59:59.000Z

66

Methyl tertiary butyl ether (MtBE) contamination of the City of Santa Monica drinking water supply  

SciTech Connect (OSTI)

In the summer of 1996, the City of Santa Monica ceased pumping groundwater from two Well Fields (Charnock and Arcadia) used for public drinking water supply due to persistent and increasing concentrations of MtBE in all seven municipal water supply wells. This lost production accounted for 50% of the City`s total drinking water supply. In late 1996, the City, in cooperation with State and Federal agencies, initiated an investigation of MtBE contamination at the two well fields. The objectives of the investigation were as follows: (1) Review available data on the production, use, chemical characteristics, fate and transport, toxicology, and remediation of MtBE; (2) Identify locations of potential sources of MtBE groundwater contamination at the well fields; (3) Develop an understanding of the hydrologic pathways from the potential sources to the drinking water wells; and (4) Evaluate alternative treatment technologies for the removal of MtBE from drinking water. In addition to a review of available information about MtBE, the investigation included an extensive review of literature and available data relevant to the well fields, including well field production histories, site and regional hydrogeology, all well logs and production in the groundwater basins, general groundwater quality, and the record of MtBE detection. Based upon the review of background information, conceptual hydrogeologic models were developed. A detailed review of agency files for over 45 potential source sites was conducted. The information from this review was summarized, and source site screening and ranking criteria were developed. A field program was conducted at the major well field (Charnock), including soil gas surveys, CPTs, soil borings and well installations, geophysics, and aquifer testing. The field program provided site data which allowed the conceptual hydrogeologic model to be refitted to actual site conditions.

Brown, A.; Farrow, J.R.C. [Komex H2O Science, Huntington Beach, CA (United States); Rodriguez, R.A. [City of Santa Monica, CA (United States)] [and others

1997-12-31T23:59:59.000Z

67

Whole-Genome Analysis of Methyl tert-Butyl Ether-Degrading Beta-Proteobacterium Methylibium petroleiphilum PM1  

E-Print Network [OSTI]

D. J. Slomczynski. 2003. BTEX/MTBE bioremediation: BionetsScow, and L. Alvarez-Cohen. MTBE and benzene biodegradationinteractions in BTEX and MTBE mixtures by an MTBE-degrading

2007-01-01T23:59:59.000Z

68

Review of potential technologies for the treatment of Methyl tertiary butyl Ether (MtBE) in drinking water  

SciTech Connect (OSTI)

At present, the state of knowledge on effective treatment technologies for MtBE in drinking water, and groundwater in general, is limited. Research by others is focusing on the remediation of MtBE close to the point of release. The City of Santa Monica, MWD, Komex and USC are currently conducting research into different technologies that could be used to remove MtBE from drinking water supplies. The objectives of the research are to evaluate different treatment technologies to identify cost-effective and technically feasible alternatives for the removal of MtBE from drinking water. The evaluation is considering moderate to high water flow rates (100 to 2,000+ gpm) and low to moderate MtBE concentrations (<2,000 {mu}g/l). The research program includes four phases: (1) Literature Review; (2) Bench Scale Study; (3) Field Scale Pre-pilot Study; and (4) Summary Evaluation. This paper presents some preliminary information and findings from the first phase of this research - the literature review. The review discusses the chemical properties of MtBE and how they affect remediation and thus, an evaluation of alternative treatment technologies. The review of available literature, and the applicability and limitations of the following technologies are presented in detail.

Brown, A.; Browne, T.E. [Komex H2O Science, Huntington Beach, CA (United States); Devinny, J.S. [Univ. of Southern California, Los Angeles, CA (United States)] [and others

1997-12-31T23:59:59.000Z

69

Comparative Environmental Performance of Two-Diesel-Fuel Oxygenates: Dibutyl Maleate (DBM) and Triproplyene Glycol Monomethyl Ether (TGME)  

SciTech Connect (OSTI)

Many studies have shown that the addition of oxygen bearing compounds to diesel fuel can significantly reduce particulate emissions. To assist in the evaluation of the environmental performance of diesel-fuel oxygenates, we have implemented a suite of diagnostic models for simulating the transport of compounds released to air, water, and soils/groundwater as well as regional landscapes. As a means of studying the comparative performance of DBM and TGME, we conducted a series of simulations for selected environmental media. Benzene and methyl tertiary butyl ether (MTBE) were also addressed because they represent benchmark fuel-related compounds that have been the subject of extensive environmental measurements and modeling. The simulations showed that DBM and TGME are less mobile in soil because of reduced vapor-phase transport and increased retention on soil particles. The key distinction between these two oxygenates is that DBM is predicted to have a greater potential than TGME for aerobic biodegradation, based on chemical structure.

Layton, D.W.; Marchetti, A.A.

2001-10-01T23:59:59.000Z

70

Process for making propenyl ethers and photopolymerizable compositions containing them  

DOE Patents [OSTI]

Propenyl ether monomers of formula A(OCH{double_bond}CHCH{sub 3}){sub n} (V) wherein n is an integer from one to six and A is selected from cyclic ethers, polyether, and alkanes are disclosed. The monomers are readily polymerized in the presence of cationic photoinitiators, when exposed to actinic radiation, to form poly(propenyl ethers) that are useful for coatings, sealants, varnishes and adhesives. Compositions for preparing polymeric coatings comprising the compounds of formula V together with particular cationic photoinitiators are also disclosed, as are processes for making the monomers from allyl halides and readily available alcohols. The process involves rearranging the resulting allyl ethers to propenyl ethers.

Crivello, J.V.

1996-01-23T23:59:59.000Z

71

Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper and lower critical consolute points  

E-Print Network [OSTI]

has been measured for a two-component critical liquid system, butyl cellosolve-water, in the region to report measurements of the shear viscosity of critical binary mixture butyl cello- solve (2-n353 Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper

Boyer, Edmond

72

Divinyl ether synthase gene and protein, and uses thereof  

DOE Patents [OSTI]

The present invention relates to divinyl ether synthase genes, proteins, and methods of their use. The present invention encompasses both native and recombinant wild-type forms of the synthase, as well as mutants and variant forms, some of which possess altered characteristics relative to the wild-type synthase. The present invention also relates to methods of using divinyl ether synthase genes and proteins, including in their expression in transgenic organisms and in the production of divinyl ether fatty acids, and to methods of suing divinyl ether fatty acids, including in the protection of plants from pathogens.

Howe, Gregg A. (East Lansing, MI); Itoh, Aya (Tsuruoka, JP)

2011-09-13T23:59:59.000Z

73

Divinyl ether synthase gene, and protein and uses thereof  

DOE Patents [OSTI]

The present invention relates to divinyl ether synthase genes, proteins, and methods of their use. The present invention encompasses both native and recombinant wild-type forms of the synthase, as well as mutants and variant forms, some of which possess altered characteristics relative to the wild-type synthase. The present invention also relates to methods of using divinyl ether synthase genes and proteins, including in their expression in transgenic organisms and in the production of divinyl ether fatty acids, and to methods of suing divinyl ether fatty acids, including in the protection of plants from pathogens.

Howe, Gregg A.; Itoh, Aya

2006-12-26T23:59:59.000Z

74

Crown Ethers Flatten in Graphene for Strong, Specific Binding...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SHARE Crown Ethers Flatten in Graphene for Strong, Specific Binding ORNL discovery holds potential for separations, sensors, batteries, biotech and more This sheet of graphene...

75

E-Print Network 3.0 - aqueous crown ethers Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ether recognition agent, as well as a glucose sensor, which utilizes... -3760, USA. vinyl crown ether into the PCCA 1,5-8. In contrast, we fab- ricatedaglucosesensing......

76

Process for producing dimethyl ether form synthesis gas  

DOE Patents [OSTI]

This invention pertains to a Fischer Tropsch process for converting synthesis gas to an oxygenated hydrocarbon with particular emphasis on dimethyl ether. Synthesis gas comprising carbon monoxide and hydrogen are converted to dimethyl ether by carrying out the reaction in the presence of an alkali metal-manganese-iron carbonyl cluster incorporated onto a zirconia-alumina support.

Pierantozzi, Ronald (Macungie, PA)

1985-01-01T23:59:59.000Z

77

Solvent Effects on Metal Complexation with Crown Ethers from Liquid to Supercritical Fluids (DE-FG07-98ER 149 13)  

SciTech Connect (OSTI)

The purpose of this project is to study the salvation effects of metal-crown ether complexation in different solvents. It has been suggested in the literature that supercritical fluid carbon dioxide (SF-CO2) is a tunable solvent because its salvation environment can be varied with the fluid density. In this project, spectroscopic techniques including nuclear magnetic resonance (NMR) and Fourier Transform Infrared (FTIR) were used to evaluate salvation effects of metal crown complexation in organic solvents and in SF-CO2. In most solvent extraction systems, water is often involved in the extraction processes. We have carried out extensive studies of water-crown ether interactions in different solvents and in SF-CO2 using NMR and FTIR techniques. Water molecules can be attached to crown ethers through hydrogen bonding of H-0-H to the oxygen atoms of crown ether cavities. This type of interaction is like a Lewis acid-Lewis base complexation. During the course of this project, we noticed that some CO2 soluble Lewis base such as tri-n-butyl-phosphate (TBP) can also form such Lewis acid-Lewis base complexes with water and other inorganic acids including nitric acid and hydrochloric acid. Inorganic acids (e.g. nitric acid) are normally not soluble in SF-CO2. However, because TBP is highly soluble in SF-CO2, an inorganic acid bound to TBP via hydrogen bonding becomes CO2 soluble. This Lewis acid-Lewis base complex approach provides a method of introducing inorganic acids into supercritical fluid CO2 for chemical reactions.

Wai, C.M.

2002-06-01T23:59:59.000Z

78

Origin of mechanical modifications in poly (ether ether ketone)/carbon nanotube composite  

SciTech Connect (OSTI)

Variations in the hardness of a poly (ether ether ketone) beam electrically modified with multi-walled carbon nanotubes (MWCNT, 0.5%-3%) are investigated. It is shown that both rupture and hardness variations correlate with the changes in carbon nanotube concentration when using micro indentation and extended Raman imaging. Statistical analysis of the relative spectral intensities in the Raman image is used to estimate local tube concentration and polymer crystallinity. We show that the histogram of the Raman D band across the image provides information about the amount of MWCNTs and the dispersion of MWCNTs in the composite. We speculate that we have observed a local modification of the ordering between pure and modified polymer. This is partially supported by small angle neutron scattering measurements, which indicate that the agglomeration state of the MWCNTs is the same at the concentrations studied.

Pavlenko, Ekaterina; Puech, Pascal; Bacsa, Wolfgang, E-mail: wolfgang.bacsa@cemes.fr [CEMES-CNRS and University of Toulouse, 29 Jeanne Marvig, 31055 Toulouse (France); Boyer, Franois; Olivier, Philippe [Universit de Toulouse, Institut Clment Ader, I.U.T. Universit Paul Sabatier - 133C Avenue de Rangueil - B.P. 67701, 31077 Toulouse CEDEX 4 (France); Sapelkin, Andrei [School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, E1 4NS London (United Kingdom); King, Stephen; Heenan, Richard [ISIS Facility, Rutherford Appleton Laboratory, Chilton, OX11 0QX Didcot (United Kingdom); Pons, Franois; Gauthier, Bndicte; Cadaux, Pierre-Henri [AIRBUS FRANCE (B.E. M and P Toulouse), 316 Route de Bayonne, 31060 Toulouse (France)

2014-06-21T23:59:59.000Z

79

Crown Ethers in Nonaqueous Electrolytes for Lithium/Air Batteries  

SciTech Connect (OSTI)

The effects of three crown ethers, 12-crown-4, 15-crown-5, and 18-crown-6, as additives and co-solvents in non-aqueous electrolytes on the cell performance of primary Li/air batteries operated in a dry air environment were investigated. Crown ethers have large effects on the discharge performance of non-aqueous electrolytes in Li/air batteries. A small amount (normally less than 10% by weight or volume in electrolytes) of 12-Crown-4 and 15-crown-5 reduces the battery performance and a minimum discharge capacity appears at the crown ether content of ca. 5% in the electrolytes. However, when the content increases to about 15%, both crown ethers improve the capacity of Li/air cells by about 28% and 16%, respectively. 15-Crown-5 based electrolytes even show a maximum discharge capacity in the crown ether content range from 10% to 15%. On the other hand, the increase of 18-crown-6 amount in the electrolytes continuously lowers of the cell performance. The different battery performances of these three crown ethers in electrolytes are explained by the combined effects from the electrolytes contact angle, oxygen solubility, viscosity, ionic conductivity, and the stability of complexes formed between crown ether molecules and lithium ions.

Xu, Wu; Xiao, Jie; Wang, Deyu; Zhang, Jian; Zhang, Jiguang

2010-02-04T23:59:59.000Z

80

Molecular Mechanism of Polybrominated Diphenyl Ether Disposition in the Liver  

E-Print Network [OSTI]

Polybrominated diphenyl ethers (PBDEs) were introduced in the late 1970's as additive flame retardants incorporated into textiles, electronics, plastics and furniture. Although 2,2',3,3',4,4',5,5',6,6'-decabromodiphenyl ...

Pacyniak, Erik Kristofer

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

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]

Charge Compression Ignition (HCCI) Engines: Key Research andJ. Girard, and R. Dibble, "HCCI in a CFR Engine: ExperimentsRyan III, and J.S. Souder, "HCCI Operation of a Dual-Fuel

Mack, John Hunter; Buchholz, Bruce A; Flowers, Daniel L; Dibble, Robert W

2005-01-01T23:59:59.000Z

82

Analysis of dissolved benzene plumes and methyl tertiary butyl ether (MTBE) plumes in ground water at leaking underground fuel tank (LUFT) sites  

SciTech Connect (OSTI)

The 1990 Clean Air Act Amendments mandate the addition of oxygenates to gasoline products to abate air pollution. Currently, many areas of the country utilize oxygenated or reformulated fuel containing 15- percent and I I-percent MTBE by volume, respectively. This increased use of MTBE in gasoline products has resulted in accidental point source releases of MTBE containing gasoline products to ground water. Recent studies have shown MTBE to be frequently detected in samples of shallow ground water from urban areas throughout the United States (Squillace et al., 1995). Knowledge of the subsurface fate and transport of MTBE in ground water at leaking underground fuel tank (LUFT) sites and the spatial extent of MTBE plumes is needed to address these releases. The goal of this research is to utilize data from a large number of LUFT sites to gain insights into the fate, transport, and spatial extent of MTBE plumes. Specific goals include defining the spatial configuration of dissolved MTBE plumes, evaluating plume stability or degradation over time, evaluating the impact of point source releases of MTBE to ground water, and attempting to identify the controlling factors influencing the magnitude and extent of the MTBE plumes. We are examining the relationships between dissolved TPH, BTEX, and MTBE plumes at LUFT sites using parallel approaches of best professional judgment and a computer-aided plume model fitting procedure to determine plume parameters. Here we present our initial results comparing dissolved benzene and MTBE plumes lengths, the statistical significance of these results, and configuration of benzene and MTBE plumes at individual LUFT sites.

Happel, A.M.; Rice, D. [Lawrence Livermore National Lab., CA (United States); Beckenbach, E. [California Univ., Berkeley, CA (United States); Savalin, L.; Temko, H.; Rempel, R. [California State Water Resources Control Board, Sacramento, CA (United States); Dooher, B. [California Univ., Los Angeles, CA (United States)

1996-11-01T23:59:59.000Z

83

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

84

Extraction of Plutonium into 30 Percent Tri-Butyl Phosphate from Nitric Acid Solution Containing Fluoride, Aluminum, and Boron  

SciTech Connect (OSTI)

This work consists of experimental batch extraction data for plutonium into 30 volume-percent tri-butyl phosphate at ambient temperature from such a solution matrix and a model of this data using complexation constants from the literature.

Kyser, E.A.

2000-01-06T23:59:59.000Z

85

Aging of Weapon Seals An Update on Butyl O-ring Issues  

SciTech Connect (OSTI)

During testing under the Enhanced Surveillance Campaign in 2001, preliminary data detected a previously unknown and potentially serious concern with recently procured butyl o-rings on several programs. All butyl o-rings molded from a proprietary formulation throughout the period circa 1999 through 2001 had less than a full cure. Engineering judgment was that under curing is detrimental and could possibly lead to sub-optimum performance or, in the worst case, premature seal failure. An aging study was undertaken to ensure that suspect o-rings installed in the stockpile will retain sufficient sealing force for a minimum ten-year service life. A new prediction model developed for this study indicates suspect o-rings do not need to be replaced before the ten-year service life. Long-term testing results are reported on a yearly basis to validate the prediction model. This report documents the aging results for the period September 2002 to January 2011.

Wilson, Mark H.

2011-07-13T23:59:59.000Z

86

Batch polymerization of styrene initiated by n-butyl lithium in a cyclohexane solvent  

E-Print Network [OSTI]

anionic mechanism. A mathematical model is de- veloped and the predicted values are compared with their corresponding experimental values. Initiator and monomer concentrations are varied and their conversion time profiles are studied. A G&el... and Storage Vessels Purification of Monomer Purification of Solvent Polymerization Reaction Scavenger Level Analysis o f Butyl Lithium Analysis of Molecular Weight Distributions by the Use of Gel Permeation Technique 10 19 19 ZO Zl ZZ 24 25 25...

Landon, Thomas Rodman

1971-01-01T23:59:59.000Z

87

he U.S. Geological Survey's (USGS) National Water-Quality Assess-  

E-Print Network [OSTI]

of the wells included methyl tert-butyl ether (MTBE), tetrachloroethene (PCE), dichlorodifluoromethane, 1

88

CATALYSTS FOR HIGH CETANE ETHERS AS DIESEL FUELS  

SciTech Connect (OSTI)

A novel 1,2-ethanediol, bis(hydrogen sulfate), disodium salt precursor-based solid acid catalyst with a zirconia substrate was synthesized and demonstrated to have significantly enhanced activity and high selectivity in producing methyl isobutyl ether (MIBE) or isobutene from methanol-isobutanol mixtures. The precursor salt was synthesized and provided by Dr. T. H. Kalantar of the M.E. Pruitt Research Center, Dow Chemical Co., Midland, MI 48674. Molecular modeling of the catalyst synthesis steps and of the alcohol coupling reaction is being carried out. A representation of the methyl transfer from the surface activated methanol molecule (left) to the activated oxygen of the isobutanol molecule (right) to form an ether linkage to yield MIBE is shown.

Kamil Klier; Richard G. Herman; James G.C. Shen; Qisheng Ma

2000-08-31T23:59:59.000Z

89

The interactions of water and perfluorodiethyl ether on Ru(100)  

SciTech Connect (OSTI)

We have studied the interactions of water and perfluorodiethyl ether on Ru(100) in order to model the effects of surface structure and humidity on the bonding and decomposition of perfluoroalkyl ether lubricants with metal surfaces. In order to understand the interactions on Ru(100), we have first investigated the interactions of each of these adsorbates alone on the clean surface. The interactions of water with Ru(100) have been studied using both thermal desorption spectroscopy (TDS) and electron energy loss spectroscopy (EELS). From these studies we conclude that a small amount of water dissociates on this surface (5--10% of a monolayer), but water is adsorbed in a predominantly molecular form on this surface with an increasing degree of hydrogen-bonding with increasing coverage. The effects of hydrogen and oxygen coadsorption on the interactions of water with this surface have also been studied using TDS. Finally, the interactions of coadsorbed water and perfluorodiethyl ether on Ru(100) have been investigated using TDS.

Leavitt, P.

1990-09-21T23:59:59.000Z

90

Thermodynamics of Hydrogen Production from Dimethyl Ether Steam Reforming and Hydrolysis  

SciTech Connect (OSTI)

The thermodynamic analyses of producing a hydrogen-rich fuel-cell feed from the process of dimethyl ether (DME) steam reforming were investigated as a function of steam-to-carbon ratio (0-4), temperature (100 C-600 C), pressure (1-5 atm), and product species: acetylene, ethanol, methanol, ethylene, methyl-ethyl ether, formaldehyde, formic acid, acetone, n-propanol, ethane and isopropyl alcohol. Results of the thermodynamic processing of dimethyl ether with steam indicate the complete conversion of dimethyl ether to hydrogen, carbon monoxide and carbon dioxide for temperatures greater than 200 C and steam-to-carbon ratios greater than 1.25 at atmospheric pressure (P = 1 atm). Increasing the operating pressure was observed to shift the equilibrium toward the reactants; increasing the pressure from 1 atm to 5 atm decreased the conversion of dimethyl ether from 99.5% to 76.2%. The order of thermodynamically stable products in decreasing mole fraction was methane, ethane, isopropyl alcohol, acetone, n-propanol, ethylene, ethanol, methyl-ethyl ether and methanol--formaldehyde, formic acid, and acetylene were not observed. The optimal processing conditions for dimethyl ether steam reforming occurred at a steam-to-carbon ratio of 1.5, a pressure of 1 atm, and a temperature of 200 C. Modeling the thermodynamics of dimethyl ether hydrolysis (with methanol as the only product considered), the equilibrium conversion of dimethyl ether is limited. The equilibrium conversion was observed to increase with temperature and steam-to-carbon ratio, resulting in a maximum dimethyl ether conversion of approximately 68% at a steam-to-carbon ratio of 4.5 and a processing temperature of 600 C. Thermodynamically, dimethyl ether processed with steam can produce hydrogen-rich fuel-cell feeds--with hydrogen concentrations exceeding 70%. This substantiates dimethyl ether as a viable source of hydrogen for PEM fuel cells.

T.A. Semelsberger

2004-10-01T23:59:59.000Z

91

E-Print Network 3.0 - aromatic crown ethers Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cryptands are unique macrocycles. Since Lehn's seminal... that are several orders of magnitude greater than monomacrocyclic crown ethers.7 Size recognition properties......

92

E-Print Network 3.0 - allyl glycidyl ether Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science 15 () Trichloromethane ()1,1,2,2-1,1,2,2-Tetrachloroethane Summary: ;() Acrolein () Acrylic acid () Allyl zlcohol () Allyl chloride () Allyl glycidyl ether(AGE) ()2-...

93

E-Print Network 3.0 - anesthesia ether cyclopropane Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 cm Source: Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 70 An Electrochemical Approach to the Guanacastepenes Summary: ), and the resulting enol ether...

94

E-Print Network 3.0 - anticancer ether lipid Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Butyric acid Oligosaccharides Peptides 13-methyltetradecanoic acid Nucleosides Ether lipids... led to a substantial increase in our knowledge of the intracellular origin of...

95

POLYCHLORINATED BIPHENYLS AND POLYBROMINATED DIPHENYL ETHERS IN GALAPAGOS SEA LIONS (ZALOPHUS WOLLEBAEKI)  

E-Print Network [OSTI]

), polybrominated diphenyl ethers (PBDEs), polychlorinated dibenzo-p- dioxins (PCDDs), and polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) repre- sent persistent

Gobas, Frank

96

E-Print Network 3.0 - alpha -chloro ethers Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

YU, and JEONG S. YU, Department of Chemistry and Chemical... functions of two engineering plastics a poly(phenylene ether) and a polycether imide) were characterized...

97

Batch polymerization of styrene and isoprene by n-butyl lithium initiator  

E-Print Network [OSTI]

-20). Analysis of products consists of determining the point at which no free lithium alkyl remains. Thus if a butyl lithium initiated polymerization were terminated with water, butane would be evolved as long as the initiator were present. The butane...? agent were evaporated under a hood. Finally the polymer. was dried in a vacuum oven at about 50'C and under a vacuum of 30 inches of gg for about 30 hours. The weight of polymer formed was determined by final weighing. 25 The monomer conversion...

Hasan, Sayeed

1970-01-01T23:59:59.000Z

98

A kinetic investigation of the reaction of dibutyl sodiophosphonate with n-butyl bromide  

E-Print Network [OSTI]

of Texn~ in partial fulfillment of the requirements for the de ree of MASTER OF SCIENCE August 1955 Major Subject: Chemistry A KINETIC INVESTIGATION OF THE REACTION OF DIBUTYL SODIOPHOSPHONATE WITH N-BUTYL BROMIDE A Thesis By James Howard Shaffer... Concentrations o " Reactants and Calculated Second Order Specific Reaction pa, ". ;e Rate Constants Table 1, 40 C Table 2, 50 0 Table 3, BO C 3c II. Initial Concentrations of React iit : ?d Apparent Rate Constants of Erofosed Die er 1!echani sm Table 4...

Shaffer, James Howard

1955-01-01T23:59:59.000Z

99

CATALYSTS FOR HIGH CETANE ETHERS AS DIESEL FUELS  

SciTech Connect (OSTI)

A tungstena-zirconia (WZ) catalyst has been investigated for coupling methanol and isobutanol to unsymmetrical ethers, i.e. methyl isobutyl ether (MIBE) and compared with earlier studied sulfated-zirconia (SZ) and Nafion-H catalysts. In all cases, the ether synthesis mechanism is a dual site S{sub N}2 process involving competitive adsorption of reactants on proximal acid sites. At low reaction temperatures, methylisobutylether (MIBE) is the predominant product. However, at temperatures >135 C the WZ catalyst is very good for dehydration of isobutanol to isobutene. The surface acid sites of the WZ catalyst and a Nafion-H catalyst were diagnosed by high resolution X-ray photoelectron spectroscopy (XPS) of N 1s shifts after adsorption of amines. Using pyridine, ethylenediamine, and triethylamine, it is shown that WZ has heterogeneous strong Broensted acid sites. Theoretical study located the transition state of the alcohol coupling reaction on proximal Broensted acid sites and accounted well for XPS core-level shifts upon surface acid-base interactions. While computations have not been carried out with WZ, it is shown that the SZ catalyst is a slightly stronger acid than CF{sub 3}SO{sub 3}H (a model for Nafion-H) by 1.3-1.4 kcal/mol. A novel sulfated zirconia catalyst having proximal strong Broensted acid sites was synthesized and shown to have significantly enhanced activity and high selectivity in producing MIBE or isobutene from methanol/isobutanol mixtures. The catalyst was prepared by anchoring 1,2-ethanediol bis(hydrogen sulfate) salt precursor onto zirconium hydroxide, followed by calcination to remove the -(CH{sub 2}CH{sub 2})- bridging residues.

Kamil Klier; Richard G. Herman; Heock-Hoi Kwon; James G. C. Shen; Qisheng Ma; Robert A. Hunsicker; Andrew P. Butler; Scott J. Bollinger

2003-03-01T23:59:59.000Z

100

Polybrominated diphenyl ether flame retardants in the antarctic environment  

E-Print Network [OSTI]

, the historical record of dioxins, PCBs and DDTs in the same cores showed a decreasing trend. At present, PBDEs are recognized as a worldwide pollution problem since they have reached remote areas such as the deep ocean, the Arctic and Antarctica (de Boer et al... that cheerful and warm Brazilian spirit. You are my Aggie family! viii NOMENCLATURE #1; critical value of a statistical test used to reject the null hypothesis ANOVA Analysis of Variance BDE Brominated Diphenyl Ether BFR Brominated Flame Retardant DC...

Yogui, Gilvan Takeshi

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Proton-conducting polymer electrolyte membranes based on fluoropolymers incorporating perfluorovinyl ether sulfonic acids and fluoroalkenes  

E-Print Network [OSTI]

acids. A novel synthetic route describing the preparation of perfluorovinyl ether monomer containing. The radical (co) and terpolymerization of 4-[(,,-trifluorovinyl)oxy]benzene sulfonyl chloride (TFVOBSC) with 1,1-difluoroethylene (or vinylidene fluoride, VDF), hexafluoropropene (HFP), and perfluoromethyl vinyl ether (PMVE

Paris-Sud XI, Université de

102

Decomposition of Ethanol and Dimethyl Ether During Chemical Vapour deposition Synthesis  

E-Print Network [OSTI]

1 Decomposition of Ethanol and Dimethyl Ether During Chemical Vapour deposition Synthesis of Single-phase thermal decomposition of ethanol and dimethyl ether (DME) at typical SWNT growth conditions using to the predicted decomposition mechanism. Signature peak intensities indicated concentrations of both ethanol

Maruyama, Shigeo

103

Use TAME and heavier ethers to improve gasoline properties  

SciTech Connect (OSTI)

Producing oxygenates from all potential FCC tertiary olefins is one of the most economic methods for reducing olefins and Reid vapor pressure (Rvp) in motor gasoline. MTBE production based on FCC isobutylene has reached a very high level. But the amount of MTBE from a refinery sidestream MTBE unit is insufficient for producing reformulated gasoline (RFG) and additional oxygenates must be purchased. The next phase will see conversion of isoamylenes in FCC light gasoline to TAME. Very little attention has been given to the heavier tertiary olefins present in the FCC light gasoline like tert-hexenes and heptenes. This route allows higher levels of oxygenates production, thereby lowering Rvp and the proportion of olefins in the gasoline pool and maximizing the use of FCC olefins. By using all the components produced by an FCC efficiently, many gasoline problems can be solved. Isobutene is converted to MTBE, C[sub 3]/C[sub 4] olefins are converted to alkylate and C[sub 5] tertiary olefins can be converted to TAME. All of these are preferred components for gasoline quality. By producing more oxygenates like MTBE, TAME and heavier ethers, a refinery can be self-sufficient in blending reformulated gasoline and no oxygenates need to be purchased. The technology for producing TAME and other ethers is described.

Ignatius, J.; Jaervelin, H.; Lindqvist, P. (Neste Engineering, Porvoo (Finland))

1995-02-01T23:59:59.000Z

104

Tests for mutagenic effects of ammoniated glycyrrhizin, butylated hydroxytoluene, and gum arabic in roden germ cells  

SciTech Connect (OSTI)

Ammoniated glycyrrhizin, butylated hydroxytoluene, and gum Arabic are generally recognized as safe (GRAS) substances that are used primarily as additives in foods. These substances were incorporated into rodent diets and fed to male rats and mice for 10 and 8 wk, respectively. The treated male mice and rats were then tested for dominant lethal effects. The mice were also tested for induced heritable translocation. Results of the rat studies indicated a statistically significant dominant lethal effect of each of the compounds tested; however, the biological significance of this response is not known. Results of the mouse dominant lethal and heritable translocation studies, on the other hand, indicated no adverse effects of the compounds tested.

Sheu, C.W.; Cain, K.T.; Rushbrook, C.J.; Jorgenson, T.A.; Generoso, W.M.

1986-01-01T23:59:59.000Z

105

Initiation Temperature for Runaway Tri-n-Butyl Phosphate/Nitric Acid Reaction  

SciTech Connect (OSTI)

In a review of the safety basis for solvent extraction processes at the Department of Energy's Savannah River Site, a question was raised concerning the safety margin associated with a postulated accident involving a runaway tri-n-butyl phosphate (TBP)/nitric acid reaction due to the inadvertent heating of a tank. The safety margin was based on studies which showed the maximum temperature would not exceed 128 degrees Celsius compared to 130 degrees Celsius, the minimum initiation temperature for runaway reaction established in the 1950's following damaging incidents at the Savannah River and Hanford Sites. The reviewers were concerned the minimum temperature was not conservative since data for solutions containing 20 wt percent dissolved solids showed initiation temperatures at or below 130 degrees Celsius and process solutions normally contain some dissolved solids.

Rudisill, T.S.

2001-09-14T23:59:59.000Z

106

Green polymer electrolytes based on chitosan and 1-butyl-3-methylimidazolium acetate  

SciTech Connect (OSTI)

Green polymer electrolytes based on chitosan as the polymer matrix and ionic liquid 1-butyl-3-methylimidazolium acetate [Bmim][OAc] as charge carriers were prepared by solution casting technique. Complexes with various amount of ionic liquid loading were investigated as possible ionic conducting polymers. The ionic conductivity was found to increase with increasing weight percent of ionic liquid. The highest ionic conductivity of the charged chitosan-[Bmim][OAc] was 2.44 10{sup ?3} S cm{sup ?1} at 90 wt.% of [Bmim][OAc] content at ambient temperature. Attenuated Total Reflection Fourier Transform infrared (ATR-FTIR) spectroscopy has proven the interaction between chitosan and [Bmim][OAc]. X-ray Diffraction (XRD) has shown that the amorphosity of the complexes increase as the amount of [Bmim][OAc] increase.

Shamsudin, Intan Juliana [Chemistry Department, Centre for Defence Foundation Studies, National Defence University of Malaysia, 57000 Kuala Lumpur (Malaysia); Ahmad, Azizan; Hassan, Nur Hasyareeda [School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Darul Ehsan (Malaysia)

2014-09-03T23:59:59.000Z

107

A potassium crown ether complex with dichloroaurate(I)  

E-Print Network [OSTI]

Acta Cryst. (2003). E59, m57m58 DOI: 10.1107/S1600536803000813 Md. Alamgir Hossain et al. #15; [K(C 12 H 24 O 6 )][AuCl 2 ] m57 metal-organic papers Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368 A potassium crown ether...-james@ku.edu Key indicators Single-crystal X-ray study T = 100 K Mean #27;(CC) = 0.002 A R factor = 0.017 wR factor = 0.047 Data-to-parameter ratio = 27.2 For details of how these key indicators were automatically derived from the article, see http...

Hossain, Alamgir; Powell, Douglas R.; Bowman-James, Kristin

2003-01-17T23:59:59.000Z

108

Solvent Effects on Cesium Complexation with Crown Ethers from Liquid to Supercritical Fluids  

SciTech Connect (OSTI)

Nuclear magnetic resonance (NMR) techniques were used to study crown ether-water interactions in solvents of low dielectric constants such as chloroform and carbon tetrachloride. Water forms a 1:1 complex with a number of crown ethers including 12-crown-4, 15-crown-5, 18-crown-6, dicyclohexano-18=crown-6, dicyclohexano-24-crown 8, and dibenzl-24-crown-8 in chloroform. Among these crown ethers, the 18-crown-6-H2 complex has the largest equilibrium constant (K=545) and 97% of the crown is complexed to water in chloroform. Addition of carbon tetrachloride to chloroform lowers the equilibrium constants of the crown-water complexes. The partition coefficients of crown ethers (D=crown in water/crown in solvent) between water and organic solvent also vary with solvent composition.

Chien M. Wai; Anne Rustenholtz; Shaofen Wang; Su-Chen Lee; Jamie Herman; Richard A. Porter

2004-03-15T23:59:59.000Z

109

E-Print Network 3.0 - acid-labile cholesterol-vinyl ether-peg...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Crystallization of Recombinant Crithidia fasciculata Tryparedoxin Summary: of 30% polyethylene glycol monomethyl ether (PEG MME) 2000, 0.1 M TrisHCl, pH 8.2, 1% dimethyl Source:...

110

Study of the peroxidation mechanism of diethyl ether (DEE) International Symposium on Loss Prvention  

E-Print Network [OSTI]

and in allylic and benzylic structures. In figure 23 are presented peroxidizable moieties in order of decreasing hazard. l.Ethers and acetals with a-hvdroaen H -i-o-

Paris-Sud XI, Université de

111

Comparison of SPME headspace analysis to U.S. EPA method5030/8260B for MTBE monitoring  

SciTech Connect (OSTI)

A novel method for analysis of methyl tert-butyl ether andtert-butyl alcohol using solid phase microextraction is described andcompared to a standard method.

Stringfellow, William T.; Oh, Kuen-Chan

2005-02-01T23:59:59.000Z

112

Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers  

E-Print Network [OSTI]

Ethylene dichloride 1 MTBE 2 Vinylchloride 3 Ethylbenzene 1Methyl- Tertiary-Butyl-Ether (MTBE) or Ethyl-Tertiary-Butyl-Styrene Vinylchloride MTBE Benzene, Toluene, Xylene Acetone

Neelis, Maarten

2008-01-01T23:59:59.000Z

113

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

114

Vapor-liquid equilibria for methanol + tetraethylene glycol dimethyl ether  

SciTech Connect (OSTI)

Vapor-liquid equilibrium (P-T-x) for the methanol + tetraethylene glycol dimethyl ether binary system were obtained by the static method in the range of temperatures from 293.15 to 423.15 K at 10 K intervals. The modified vapor pressure apparatus used is described. The Kuczynsky method was used to calculate the liquid and vapor composition and the activity coefficients of methanol from the initial composition of the sample and the measured pressure and temperature. The results were correlated by the NRTL and UNIQUAC temperature dependent activity coefficient models. This system shows nearly ideal behavior at 323.15 K, but positive deviations from ideality at lower temperatures and negative deviations at higher temperatures are observed. The activity coefficients become more negative with the increase in temperature and mole fraction of methanol. The excess molar enthalpy using the Gibss-Helmholtz equation and the NRTL and UNIQUAC parameters were calculated at 303.15 K and compared with experimental data. This binary system shows promise as a working pair for high-temperature heat pump applications.

Esteve, X.; Chaudhari, S.K.; Coronas, A. [Univ. Rovira i Virgili, Tarragona (Spain). Dept. of Electrical and Mechanical Engineering

1995-11-01T23:59:59.000Z

115

Treatability studies of groundwater contaminated with bis(2-chloroethyl) ether  

SciTech Connect (OSTI)

The groundwater aquifer underneath a chemical manufacturing plant in Southeast Texas has been contaminated with the leachate from its landfill. There are 17 major chlorinated hydrocarbon contaminants found in the groundwater with concentrations ranging from 1 ppm to 1,200 ppm. An air-stripping unit followed by a thermal catalytic oxidation unit is currently operating on-site to remove all of the chlorinated compounds from the contaminated groundwater. One of the contaminants, bis(2-chloroethyl)ether (DCEE), has a fairly low Henry`s Law constant; therefore, a high air flow rate is employed in the stripping unit to improve the overall stripping efficiency. Nevertheless, the treated groundwater still contains a fair amount of DCEE. An UV-peroxidation reactor is set up to study its feasibility for oxidizing DCEE. The treatability data indicate that DCEE at a concentration of 200 ppm can be oxidized effectively in the presence of H{sub 2}O{sub 2} and the effective UV wavelengths lie between 200 and 280 nm. No noticeable reduction of the oxidation rate is observed at low temperature ({approximately} 11 C). Apparent oxidation rate equations of DCEE are determined and several process design parameters are discussed.

Huang, F.Y.C. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Dept. of Mineral and Environmental Engineering] [New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Dept. of Mineral and Environmental Engineering; Li, K.Y.; Liu, C.C. [Lamar Univ., Beaumont, TX (United States). Dept. of Chemical Engineering] [Lamar Univ., Beaumont, TX (United States). Dept. of Chemical Engineering

1999-05-01T23:59:59.000Z

116

Initiation Temperature for Runaway Tri-n-Butyl Phosphate/Nitric Acid Reaction  

SciTech Connect (OSTI)

During a review of the H-Canyon authorization basis, Defense Nuclear Facility Safety Board (DNFSB) staff members questioned the margin of safety associated with a postulated tri-n-butyl phosphate (TBP)/nitric acid runaway reaction due to the inadvertent heating of a canyon tank containing greater than 3000 lbs (1362 kg) of TBP. The margin of safety was partially based on experiments and calculations performed by the Actinide Technology Section (ATS) to support deletion of indication of tank agitation as a Safety Class System. In the technical basis for deletion of this system, ATS personnel conservatively calculated the equilibrium temperature distribution of a canyon tank containing TBP and nitric acid layers which were inadvertently heated by a steam jet left on following a transfer. The maximum calculated temperature (128 degrees C) was compared to the minimum initiation temperature for a runaway reaction (greater than 130 degrees C) documented by experimental work in the mid 195 0s. In this work, the initiation temperature as a function of nitric acid concentration was measured for 0 and 20 wt percent dissolved solids. The DNFSB staff members were concerned that data for 0 wt percent dissolved solids were not conservative given the facts that data for 20 wt percent dissolved solids show initiation temperatures at or below 130 degrees C and H-Canyon solutions normally contained a small amount of dissolved solids.

Rudisill, T.S.

2000-11-28T23:59:59.000Z

117

Thorium ions transport across Tri-n-butyl phosphate-benzene based supported liquid membranes  

SciTech Connect (OSTI)

Transport of Th(IV) ions across tri-n-butyl phosphate (TBP) benzene based liquid membranes supported in microporous hydrophobic polypropylene film (MHPF) has been studied. Various parameters such as variation of nitric acid concentration in the feed, TBP concentration in the membrane, and temperature on the given metal ions transport have been investigated. The effects of nitric acid and TBP concentrations on the distribution coefficient were also studied, and the data obtained were used to determine the Th ions-TBP complex diffusion coefficient in the membrane. Permeability coefficients of Th(IV) ions were also determined as a function of the TBP and nitric acid concentrations. The optimal conditions for the transport of Th(IV) ions across the membrane are 6 mol{sm_bullet}dm{sup -3} HNO{sub 3} concentration, 2.188 mol {center_dot} dm{sup -3} TBP concentration, and 25{degrees}C. The stoichiometry of the chemical species involved in chemical reaction during the transport of Th(IV) ions has also been studied.

Rasul, G.; Chaudry, M.A. [Pakistan Institute of Nuclear Chemistry, Islamabad (Pakistan); Afzal, M. [Quaid-I-Azam Univ., Islamabad (Pakistan)

1995-12-01T23:59:59.000Z

118

DIMETHYL ETHER (DME)-FUELED SHUTTLE BUS DEMONSTRATION PROJECT  

SciTech Connect (OSTI)

The objectives of this research and demonstration program are to convert a campus shuttle bus to operation on dimethyl ether, a potential ultra-clean alternative diesel fuel. To accomplish this objective, this project includes laboratory evaluation of a fuel conversion strategy, as well as, field demonstration of the DME-fueled shuttle bus. Since DME is a fuel with no lubricity (i.e., it does not possess the lubricating quality of diesel fuel), conventional fuel delivery and fuel injection systems are not compatible with dimethyl ether. Therefore, to operate a diesel engine on DME one must develop a fuel-tolerant injection system, or find a way to provide the necessary lubricity to the DME. In this project, they have chosen the latter strategy in order to achieve the objective with minimal need to modify the engine. Their strategy is to blend DME with diesel fuel, to obtain the necessary lubricity to protect the fuel injection system and to achieve low emissions. The bulk of the efforts over the past year were focused on the conversion of the campus shuttle bus. This process, started in August 2001, took until April 2002 to complete. The process culminated in an event to celebrate the launching of the shuttle bus on DME-diesel operation on April 19, 2002. The design of the system on the shuttle bus was patterned after the system developed in the engine laboratory, but also was subjected to a rigorous failure modes effects analysis (FMEA, referred to by Air Products as a ''HAZOP'' analysis) with help from Dr. James Hansel of Air Products. The result of this FMEA was the addition of layers of redundancy and over-pressure protection to the system on the shuttle bus. The system became operational in February 2002. Preliminary emissions tests and basic operation of the shuttle bus took place at the Pennsylvania Transportation Institute's test track facility near the University Park airport. After modification and optimization of the system on the bus, operation on the campus shuttle route began in early June 2002. However, the work and challenges continued as it has been difficult to maintain operability of the shuttle bus due to fuel and component difficulties. In late June 2002, the pump head itself developed operational problems (loss of smooth function) leading to excessive stress on the magnetic coupling and excessive current draw to operate. A new pump head was installed on the system to alleviate this problem and the shuttle bus operated successfully on DME blends from 10-25 vol% on the shuttle bus loop until September 30, 2002. During the period of operation on the campus loop, the bus was pulled from service, operated at the PTI test track and real-time emissions measurements were obtained using an on-board emissions analyzer from Clean Air Technologies International, Inc. Particulate emissions reductions of 60% and 80% were observed at DME blend ratios of 12 vol.% and 25 vol.%, respectively, as the bus was operated over the Orange County driving cycle. Increases in NOx, CO and HC emissions were observed, however. In summary, the conversion of the shuttle bus was successfully accomplished, particulate emissions reductions were observed, but there were operational challenges in the field. Nonetheless, they were able to demonstrate reliable operation of the shuttle bus on DME-diesel blends.

Elana M. Chapman; Shirish Bhide; Jennifer Stefanik; Howard Glunt; Andre L. Boehman; Allen Homan; David Klinikowski

2003-04-01T23:59:59.000Z

119

The Scientific Basis for the Regulation of Nanoparticles: Challenging Paracelsus and Pare  

E-Print Network [OSTI]

NANOTECHNOILOGY 402 (2007). 20. MTBE unquestionably causesTertiary-Butyl Ether (MTBE)-a Gasoline Additive-CausesMethyl Tertiary-butyl Ether (MTBE) in CD-I Mice and F-344

Goldstein, Bernard D.

2010-01-01T23:59:59.000Z

120

QUANTIFYING NON-POINT SOURCES OF VOLATILE ORGANIC COMPOUNDS IN STORMWATER FROM A PARKING LOT  

E-Print Network [OSTI]

-butyl ether (MTBE) on urban particles indicates a site- specific interaction between MTBE and a particulate is a possible source only for the gasoline oxygenate methyl tert-butyl ether (MTBE). Lopes and Bender (1998

Note: This page contains sample records for the topic "butyl ether na" 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

Life-cycle Environmental Inventory of Passenger Transportation in the United States  

E-Print Network [OSTI]

Methyltert?ButylEther(MTBE);http://www.atsdr.cdc.gov/MethylTertiaryButyl Ether (MTBE), which was easilyaccountingwasnotperformedonMTBEandtheresult of

Chester, Mikhail V

2008-01-01T23:59:59.000Z

122

Ab initio calculations of various protonation sites in perfluorodiethyl ether: Models for high temperature lubricant decomposition?  

SciTech Connect (OSTI)

Although perfluoropolyether (PFPE) lubricants have found successful application in spacecraft mechanisms and computer hard drives, there eventual breakdown is irksome, and the mechanism of decomposition is the subject of much scrutiny. However, very little notice is taken of the monomer ethers on which the polymer lubricants are based. Recently, concerted studies of the Lewis base properties of various fluorinated ethers have been performed, both from an experimental and a theoretical viewpoint. As an extension of the theoretical work, this study presents ab initio theoretical consideration of the multiple potential basic sites within perfluorodiethyl ether, (CF{sub 3}CF{sub 2}){sub 2}O, by way of the proton affinity of the molecule at various possible protonation sites (i.e., oxygen and fluorine atoms). The results indicate that although protonation at the oxygen is more energetically favored, protonation at the fluorine is not much higher in energy and provides for formation of an excellent leaving group, HF.

Ball, D.W. [Cleveland State Univ., OH (United States). Dept. of Chemistry

1995-04-01T23:59:59.000Z

123

Catalyst system and process for benzyl ether fragmentation and coal liquefaction  

DOE Patents [OSTI]

Dibenzyl ether can be readily cleaved to form primarily benzaldehyde and toluene as products, along with minor amounts of bibenzyl and benzyl benzoate, in the presence of a catalyst system comprising a Group 6 metal, preferably molybdenum, a salt, and an organic halide. Although useful synthetically for the cleavage of benzyl ethers, this cleavage also represents a key model reaction for the liquefaction of coal; thus this catalyst system and process should be useful in coal liquefaction with the advantage of operating at significantly lower temperatures and pressures.

Zoeller, J.R.

1998-04-28T23:59:59.000Z

124

Toxicity of polychlorinated diphenyl ethers in Hydra attenuata and in rat whole embryo culture  

E-Print Network [OSTI]

TOXICITY OF POLYCHLORINATED DIPHENYL ETHERS IN HYDRA A?TENUATA AND IN RAT WHOLE EMBRYO CULTURE A Thesis by MARION CAROL BECKER Submitted to the Office of Graduate Studies of Texas A8cM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1991 Major Subject: Toxicology TOXICITY OF POLYCHLORINATED DIPHENYL ETHERS IN HYDRA A1TENUATA AND IN RAT WHOLE EMBRYO CULTURE by MARION CAROL BECKER Approved as to style and content by: Stephen H. S (Ca...

Becker, Marion Carol

1991-01-01T23:59:59.000Z

125

Characterization of trace gases measured over Alberta oil sands mining operations: 76 speciated C2-C10volatile organic compounds (VOCs), CO2, CH4, CO, NO, NO2, NOy, O3and SO2  

E-Print Network [OSTI]

K. : Atmospheric chemistry of gasoline-related emissions:chemistry. Methyl tert-butyl ether is a solvent and gasoline

2010-01-01T23:59:59.000Z

126

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

127

Vol. 83, No. 2, 2006 121 Analysis of Heat Transfer Fouling by Dry-Grind Maize Thin Stillage  

E-Print Network [OSTI]

-tertiary butyl ether (MTBE), a petroleum derivative, and ethanol. In recent years, MTBE has been phased out due

128

Health risks associated with exposure to gasoline additives-methyl tertiary butyl ether [MTBE]. Hearing before a Subcommittee of the Committee on Appropriations, United States Senate, One Hundred Third Congress, First Session, Special Hearing  

SciTech Connect (OSTI)

This hearing focuses on an Alaskan study by the Centers for Disease Control which examines possible health risks associated with exposure to gasoline additive know as MTBE. Testimony is given by Dr. William Roper, Director, CDC.

Not Available

1993-01-01T23:59:59.000Z

129

Radical-anions of aromatic compounds. VII. Reaction of the products from the reduction of nitrobenzene by sodium with isopropyl and tert-butyl iodides  

SciTech Connect (OSTI)

The reaction of the products from the reduction of nitrobenzene by one and two equivalents of sodium with isopropyl iodide leads to the formation of N,O-diisopropylphenylhydroxylamine, while the reaction with tert-butyl iodide leads to p-(tert-butyl)nitrobenzene. Such a change in the nature of the reaction product in the transition from the primary and secondary alkyl halides to the tertiary alkyl halides clearly results from a change in the S/sub N/2 mechanism to the S/sub RN/1 mechanism, involving transfer of an electron from the radical-anion or dianion of nitrobenzene to the alkyl halide. The formation of considerable amounts of azoxybenzene in the reaction with tert-butyl iodide shows that the dianion and, to a lesser degree, the radical-anion of nitrobenzene exhibit basic characteristics.

Danilova, N.K.; Shteingarts, V.D.

1986-09-20T23:59:59.000Z

130

Lithium Hexamethyldisilazide-Mediated Ketone Enolization: The Influence of Hindered Dialkyl Ethers and Isostructural  

E-Print Network [OSTI]

Lithium Hexamethyldisilazide-Mediated Ketone Enolization: The Influence of Hindered Dialkyl Ethers of the enolization of 2-methylcyclohexanone mediated by lithium hexameth- yldisilazide (LiHMDS; TMS2NLi) solvated- bine to make lithium hexamethyldisilazide (LiHMDS) one of the most important Bronsted bases in organic

Collum, David B.

131

Dimethyl ether (DME) from coal as a household cooking fuel in China  

E-Print Network [OSTI]

be made from any carbonaceous feedstock, including natural gas, coal, or biomass, using establishedDimethyl ether (DME) from coal as a household cooking fuel in China Eric D. Larson Princeton gas (LPG) as a household cooking fuel. As such, DME is an attractive fuel for clean cooking. DME can

132

Viscoelastic Behavior of Poly(ether imide) Incorporated with Multiwalled Carbon Nanotubes  

E-Print Network [OSTI]

plastic, and suitable for use in many demanding applications because of its relatively high strength, high, and thermal properties of engineering plastics, including poly(ether imide) (PEI), with various nanoin; viscoelastic properties INTRODUCTION The demand for lightweight materials with high strength and thermal

Fisher, Frank

133

Effect of thermal history on the molecular orientation in polystyrene/poly(vinyl methyl ether) blends  

E-Print Network [OSTI]

ether) (PS/PVME) has been studied using polarization modulation infrared linear dichroism (PM to an increased orientation if the heating time at 51 8C is kept short. Moreover, PS and PVME develop a larger) blends; Thermal history; Polarization modulation infrared linear dichroism 1. Introduction The influence

Pezolet, Michel

134

Assessment of ether and alcohol fuels from coal. Volume 2. Technical report  

SciTech Connect (OSTI)

A unique route for the indirect liquefaction of coal to produce transportation fuel has been evaluated. The resultant fuel includes alkyl tertiary alkyl ethers and higher alcohols, all in the gasoline boiling range. When blended into gasoline, the ether fuel provides several advantages over the lower alcohols: (1) lower chemical oxygen content, (2) less-severe water-separation problems, and (3) reduced front-end volatility effects. The ether fuel also has high-octane quality. Further, it can be utilized as a gasoline substitute in all proportions. Production of ether fuel combines several steps, all of which are or have been practiced on an industrial scale: (1) coal gasification, (2) gas cleanup and shift to desired H/sub 2/:CO ratio, (3) conversion of synthesis gas to isobutanol, methanol, and higher alcohols, (4) separation of alcohols, (5) chemical dehydration of isobutanol to isobutylene, and (6) etherification of isobutylene with methanol. A pilot-plant investigation of the isobutanol synthesis step was performed. Estimates of ether-fuel manufacturing costs indicate this process route is significantly more costly than synthesis of methanol. However, the fuel performance features provide incentive for developing the necessary process and catalyst improvements. Co-production of higher-molecular-weight co-solvent alcohols represents a less-drastic form of methanol modification to achieve improvement in the performance of methanol-gasoline blends. Costs were estimated for producing several proportions of methanol plus higher alcohols from coal. Estimated fuel selling price increases regularly but modestly with higher alcohol content.

Not Available

1983-03-01T23:59:59.000Z

135

Report from NA49  

E-Print Network [OSTI]

The signatures of the onset of deconfinement, found by the NA49 experiment at low SPS energies, are confronted with new results from the Beam Energy Scan (BES) program at BNL RHIC and CERN LHC results. Additionally, new NA49 results on chemical (particle ratio) fluctuations, azimuthal angle fluctuations, intermittency of di-pions, etc. are presented.

Katarzyna Grebieszkow; for the NA49 Collaboration

2011-12-04T23:59:59.000Z

136

Successful Pregnancy with a Full-Term Vaginal Delivery One Year After n-Butyl Cyanoacrylate Embolization of a Uterine Arteriovenous Malformation  

SciTech Connect (OSTI)

Uterine arteriovenous malformation (AVM) causes significant morbidity with vaginal bleeding. Traditional therapy is a hysterectomy with no potential for future pregnancy. We present a case of successful superselective embolization of uterine AVM using n-butyl cyanoacrylate with subsequent normal term pregnancy and uncomplicated vaginal delivery in 1 year.

McCormick, Colleen C. [Johns Hopkins University School of Medicine, Department of Gynecology and Obstetrics (United States); Kim, Hyun S. [Johns Hopkins University School of Medicine, Russell H. Morgan Department of Radiology and Radiological Science (United States)], E-mail: sikhkim@jhmi.edu

2006-08-15T23:59:59.000Z

137

Process to convert biomass and refuse derived fuel to ethers and/or alcohols  

DOE Patents [OSTI]

A process is described for conversion of a feedstock selected from the group consisting of biomass and refuse derived fuel (RDF) to provide reformulated gasoline components comprising a substantial amount of materials selected from the group consisting of ethers, alcohols, or mixtures thereof, comprising: drying said feedstock; subjecting said dried feedstock to fast pyrolysis using a vortex reactor or other means; catalytically cracking vapors resulting from said pyrolysis using a zeolite catalyst; condensing any aromatic byproduct fraction; catalytically alkylating any benzene present in said vapors after condensation; catalytically oligomerizing any remaining ethylene and propylene to higher olefins; isomerizing said olefins to reactive iso-olefins; and catalytically reacting said iso-olefins with an alcohol to form ethers or with water to form alcohols. 35 figs.

Diebold, J.P.; Scahill, J.W.; Chum, H.L.; Evans, R.J.; Rejai, B.; Bain, R.L.; Overend, R.P.

1996-04-02T23:59:59.000Z

138

Process to convert biomass and refuse derived fuel to ethers and/or alcohols  

DOE Patents [OSTI]

A process for conversion of a feedstock selected from the group consisting of biomass and refuse derived fuel (RDF) to provide reformulated gasoline components comprising a substantial amount of materials selected from the group consisting of ethers, alcohols, or mixtures thereof, comprising: drying said feedstock; subjecting said dried feedstock to fast pyrolysis using a vortex reactor or other means; catalytically cracking vapors resulting from said pyrolysis using a zeolite catalyst; condensing any aromatic byproduct fraction; catalytically alkylating any benzene present in said vapors after condensation; catalytically oligomerizing any remaining ethylene and propylene to higher olefins; isomerizing said olefins to reactive iso-olefins; and catalytically reacting said iso-olefins with an alcohol to form ethers or with water to form alcohols.

Diebold, James P. (Lakewood, CO); Scahill, John W. (Evergreen, CO); Chum, Helena L. (Arvada, CO); Evans, Robert J. (Lakewood, CO); Rejai, Bahman (Lakewood, CO); Bain, Richard L. (Golden, CO); Overend, Ralph P. (Lakewood, CO)

1996-01-01T23:59:59.000Z

139

Kinetics of liquid phase catalytic dehydration of methanol to dimethyl ether  

SciTech Connect (OSTI)

This paper reports the kinetics of the liquid phase catalytic dehydration of methanol to dimethyl ether investigated. The experiments were carried out under low concentrations of feed in a 1-L stirred autoclave, according to a statistical experimental design. The inert liquid phase used for this investigation was a 78:22 blend of paraffinic and naphthenic mineral oils. A complete thermodynamic analysis was carried out in order to determine the liquid phase concentrations of the dissolved species. A global kinetic model was developed for the rate of dimethyl ether synthesis in terms of the liquid phase concentration of methanol. The activation energy of the reaction was found to be 18,830 cal/gmol. Based on a step-wise linear regression analysis of the kinetic data, the order of the reaction which gave the best fit was 0.28 with respect to methanol.

Gogate, M.R.; Lee, B.G.; Lee, S. (Akron Univ., OH (USA). Dept. of Chemical Engineering); Kulik, C.J. (Electric Power Research Inst., Palo Alto, CA (USA))

1990-01-01T23:59:59.000Z

140

2[prime] and 3[prime] Carboranyl uridines and their diethyl ether adducts  

DOE Patents [OSTI]

A process is described for preparing carboranyl uridine nucleoside compounds and their diethyl ether adducts, which exhibit a tenfold increase in boron content over prior art boron containing nucleoside compounds. The carboranyl uridine nucleoside compounds exhibit enhanced lipophilicity and hydrophilic properties adequate to enable solvation in aqueous media for subsequent incorporation of the compounds in methods for boron neutron capture therapy in mammalian tumor cells. No Drawings

Soloway, A.H.; Barth, R.F.; Anisuzzaman, A.K.; Alam, F.; Tjarks, W.

1992-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Molecular modeling of the morphology and transport properties of two direct methanol fuel cell membranes: phenylated sulfonated poly(ether ether ketone ketone) versus Nafion  

SciTech Connect (OSTI)

We have used molecular dynamics simulations to examine membrane morphology and the transport of water, methanol and hydronium in phenylated sulfonated poly ether ether ketone ketone (Ph-SPEEKK) and Nafion membranes at 360 K for a range of hydration levels. At comparable hydration levels, the pore diameter is smaller, the sulfonate groups are more closely packed, the hydronium ions are more strongly bound to sulfonate groups, and the diffusion of water and hydronium is slower in Ph-SPEEKK relative to the corresponding properties in Nafion. The aromatic carbon backbone of Ph-SPEEKK is less hydrophobic than the fluorocarbon backbone of Nafion. Water network percolation occurs at a hydration level ({lambda}) of {approx}8 H{sub 2}O/SO{sub 3}{sup -}. At {lambda} = 20, water, methanol and hydronium diffusion coefficients were 1.4 x 10{sup -5}, 0.6 x 10{sup -5} and 0.2 x 10{sup -5} cm{sup 2}/s, respectively. The pore network in Ph-SPEEKK evolves dynamically and develops wide pores for {lambda} > 20, which leads to a jump in methanol crossover and ion transport. This study demonstrates the potential of aromatic membranes as low-cost challengers to Nafion for direct methanol fuel cell applications and the need to develop innovative strategies to combat methanol crossover at high hydration levels.

Devanathan, Ramaswami; Idupulapati, Nagesh B.; Dupuis, Michel

2012-08-14T23:59:59.000Z

142

Effect of solvents on the radiation-induced polymerization of ethyl and isopropyl vinyl ethers  

SciTech Connect (OSTI)

The effect of solvents on the radiation-induced cationic polymerization of ethyl and isopropyl vinyl ethers (EVE and IPVE, respectively) was investigated. EVE and IPVE polymerizations were carried out in bulk and in solution under superdry conditions in which polar impurities, especially water, have been reduced to negligible levels. This was accomplished by means of a sodium mirror technique using joint free baked out glass equipment and high vacuum. Plots of the monomer conversions and irradiation times were obtained for EVE and IPVE polymerizations in bulk and in benzene solution at constant monomer concentrations. The monomer concentration dependence of the polymerization rate was studied for EVE polymerization in bulk and in benzene, diethlyl ether, diglyme and methylene chloride, and for IPVE polymerization in bulk and in benzene. Solvent effect on the estimated propagating rate constants was examined for EVE and IPVE polymerization in bulk and in solution. The effect of temperature on the polymerization rate was also investigated for EVE polymerization in bulk ad in benzene, diethyl and diisopropyl ethers, methylene chloride and nitromethane, and for IPVE ploymerization in bulk and in benzene.

Hsieh, W.C.

1981-01-01T23:59:59.000Z

143

Use of ferric sulfate: acid media for the desulfurization of model compounds of coal. [Dibenzothiophene, diphenyl sulfide, di-n-butyl sulfide  

SciTech Connect (OSTI)

The objective of this work has been to investigate the ability of ferric sulfate-acid leach systems to oxidize the sulfur in model compounds of coal. Ferric iron-acid leach systems have been shown to be quite effective at removal of inorganic sulfur in coal. In this study, the oxidative effect of ferric iron in acid-leach systems was studied using dibenzothiophene, diphenyl sulfide, and di-n-butyl sulfide as models of organic sulfur groups in coal. Nitrogen and oxygen, as well as various transition metal catalysts and oxidants, were utilized in this investigation. Dibenzothiophene was found to be quite refractory to oxidation, except in the case where metavanadate was added, where it appears that 40% oxidation to sulfone could have occurred per hour at 150/sup 0/C and mild oxygen pressure. Diphenyl sulfide was selectively oxidized to sulfoxide and sulfone in an iron and oxygen system. Approximately 15% conversion to sulfone occurred per hour under these conditions. Some of the di-n-butyl sulfide was cracked to 1-butene and 1-butanethiol under similar conditions. Zinc chloride and ferric iron were used at 200/sup 0/C in an attempt to desulfonate dibenzothiophene sulfone, diphenyl sulfone, and di-n-butyl sulfone. Di-n-butyl sulfone was completely desulfurized on one hour and fragmented to oxidized parafins, while dibenzothiophene sulfone and diphenyl sulfone were unaffected. These results suggest that an iron-acid leach process could only selectively oxidize aryl sulfides under mild conditions, representing only 20% of the organic sulfur in coal (8% of the total sulfur). Removal through desulfonation once selective sulfur oxidation had occurred was only demonstrated for alkyl sulfones, with severe oxidation of the fragmented paraffins also occurring in one hour.

Clary, L.R.; Vermeulen, T.; Lynn, S.

1980-12-01T23:59:59.000Z

144

Identification of volatile butyl rubber thermal-oxidative degradation products by cryofocusing gas chromatography/mass spectrometry (cryo-GC/MS).  

SciTech Connect (OSTI)

Chemical structure and physical properties of materials, such as polymers, can be altered as aging progresses, which may result in a material that is ineffective for its envisioned intent. Butyl rubber formulations, starting material, and additives were aged under thermal-oxidative conditions for up to 413 total days at up to 124 %C2%B0C. Samples included: two formulations developed at Kansas City Plant (KCP) (%236 and %2310), one commercially available formulation (%2321), Laxness bromobutyl 2030 starting material, and two additives (polyethylene AC-617 and Vanax MBM). The low-molecular weight volatile thermal-oxidative degradation products that collected in the headspace over the samples were preconcentrated, separated, and detected using cryofocusing gas chromatography mass spectrometry (cryo-GC/MS). The majority of identified degradation species were alkanes, alkenes, alcohols, ketones, and aldehydes. Observations for Butyl %2310 aged in an oxygen-18 enriched atmosphere (18O2) were used to verify when the source of oxygen in the applicable degradation products was from the gaseous environment rather than the polymeric mixture. For comparison purposes, Butyl %2310 was also aged under non-oxidative thermal conditions using an argon atmosphere.

Smith, Jonell Nicole; White, Michael Irvin; Bernstein, Robert; Hochrein, James Michael

2013-02-01T23:59:59.000Z

145

Molecular Dynamics Simulations of Tri-n-butyl-phosphate/n-Dodecane Mixture: Thermophysical Properties and Molecular Structure  

SciTech Connect (OSTI)

Molecular dynamics simulations of tri-n-butyl-phosphate (TBP)/n-dodecane mixture in the liquid phase have been carried out using two recently developed TBP force field models (J. Phys. Chem. B 2012, 116, 305) in combination with the all-atom optimized potentials for liquid simulations (OPLS-AA) force field model for n-dodecane. Specifically, the electric dipole moment of TBP, mass density of the mixture, and the excess volume of mixing were computed with TBP mole fraction ranging from 0 to 1. It is found that the aforementioned force field models accurately predict the mass density of the mixture in the entire mole fraction range. Commensurate with experimental measurements, the electric dipole moment of the TBP was found to slightly increase with the mole fraction of TBP in the mixture. Also, in accord with experimental data, the excess volume of mixing is positive in the entire mole fraction range, peaking at TBP mole fraction range 0.3 0.5. Finally, a close examination of the spatial pair correlation functions between TBP molecules, and between TBP and n-dodecane molecules, revealed formation of TBP dimers through self-association at close distance, a phenomenon with ample experimental evidence.

de Almeida, Valmor F [ORNL; Cui, Shengting [ORNL; Khomami, Bamin [ORNL

2014-01-01T23:59:59.000Z

146

High octane ethers from synthesis gas-derived alcohols. Quarterly technical progress report, April--June 1993  

SciTech Connect (OSTI)

The results shown in Figures 10 and 11 demonstrate that the formation of butenes was very sensitive to the alcohol partial pressure. A small elevation of the alcohol pressure suppressed the formation of butenes rather drastically at both 90 and 117{degree}C. The synthesis rates of DME, MIBE, and MTBE ethers were not significantly affected at 90{degree}C, although there was a trend to increase the space time yield of DME as the alcohol pressure was increased. At the reaction temperature of 117{degree}C, all of the ethers showed increasing productivities as the pressure of the reactants was increased (Figure 11). An isotope labelling experiment was carried out to provide mechanistic insight into the manner in which methanol and isobutanol react together to form DME, MIBE, and MTBE ethers and to determine if MTBE were derived from MIBE.

Klier, K.; Herman, R.G.; Menszak, J.; Johansson, M.A.; Feeley, O.C.; Kim, D.

1993-07-01T23:59:59.000Z

147

Commercial-scale demonstration of the Liquid Phase Methanol (LPMEOH{trademark}) Process. Peroxide formation of dimethyl ether in methanol mixtures  

SciTech Connect (OSTI)

Organic peroxides could form when dimethyl ether in methanol is stored for three to six months at a time. The objective of this work was to determine the level of peroxide formation from dimethyl ether in reagent grade methanol and raw methanol at room temperature under 3 atmospheres (45 psig) of air. Raw methanol is methanol made from syngas by the LPMEOH Process without distillation. Aliphatic ethers tend to react slowly with oxygen from the air to form unstable peroxides. However, there are no reports on peroxide formation from dimethyl ether. After 172 days of testing, dimethyl ether in either reagent methanol or raw methanol at room temperature and under 60--70 psig pressure of air does not form detectable peroxides. Lack of detectable peroxides suggests that dimethyl ether or dimethyl ether and methanol may be stored at ambient conditions. Since the compositions of {approximately} 1.3 mol% or {approximately} 4.5 mol% dimethyl ether in methanol do not form peroxides, these compositions can be considered for diesel fuel or an atmospheric turbine fuel, respectively.

Waller, F.J.

1997-11-01T23:59:59.000Z

148

Calixarene crown ether solvent composition and use thereof for extraction of cesium from alkaline waste solutions  

DOE Patents [OSTI]

A solvent composition and corresponding method for extracting cesium (Cs) from aqueous neutral and alkaline solutions containing Cs and perhaps other competing metal ions is described. The method entails contacting an aqueous Cs-containing solution with a solvent consisting of a specific class of lipophilic calix[4]arene-crown ether extractants dissolved in a hydrocarbon-based diluent containing a specific class of alkyl-aromatic ether alcohols as modifiers. The cesium values are subsequently recovered from the extractant, and the solvent subsequently recycled, by contacting the Cs-containing organic solution with an aqueous stripping solution. This combined extraction and stripping method is especially useful as a process for removal of the radionuclide cesium-137 from highly alkaline waste solutions which are also very concentrated in sodium and potassium. No pre-treatment of the waste solution is necessary, and the cesium can be recovered using a safe and inexpensive stripping process using water, dilute (millimolar) acid solutions, or dilute (millimolar) salt solutions. An important application for this invention would be treatment of alkaline nuclear tank wastes. Alternatively, the invention could be applied to decontamination of acidic reprocessing wastes containing cesium-137.

Moyer, Bruce A. (Oak Ridge, TN); Sachleben, Richard A. (Knoxville, TN); Bonnesen, Peter V. (Knoxville, TN); Presley, Derek J. (Ooltewah, TN)

2001-01-01T23:59:59.000Z

149

Title: Decomposition of ethanol and dimethyl-ether during CVD synthesis of single-walled carbon nanotubes  

E-Print Network [OSTI]

of ethanol and dimethyl-ether during CVD synthesis of single-walled carbon nanotubes Author list: Bo Hou (single-walled carbon nanotubes) was investigated. Gas-phase thermal decomposition of ethanol and DME ethanol and DME decomposition, confirming expected reaction trends and primary byproducts. Peak

Maruyama, Shigeo

150

Effects of oxygenate concentration on species mole fractions in premixed n-heptane flames  

E-Print Network [OSTI]

-heptane/oxygenate mixtures were 2.7 and 3.4. Three different fuel oxygenates (i.e. MTBE, methanol, and ethanol) were tested tertiary-butyl ether (MTBE), ethyl tertiary-butyl ether (ETBE), and tertiary amyl methyl ether (TAME)) were considered as possible fuel oxygenates. MTBE and ethanol are the most common oxygenates currently used

Senkan, Selim M.

151

Solvent Extraction Behavior of Neptunium (IV) Ions between Nitric Acid and Diluted 30% Tri-butyl Phosphate in the Presence of Simple Hydroxamic Acids  

SciTech Connect (OSTI)

Formo- and aceto-hydroxamic acids are very effective reagents for stripping tetravalent actinide ions such as Np(IV) and Pu(IV) ions from a tri-butyl phosphate phase into nitric acid. Distribution data for Np(IV) in the presence of these hydroxamate ions have now been accumulated and trends established. Stability constants for aceto-hydroxamate complexes of Np(IV) and Np(V) ions have also been determined in a perchlorate medium, and these reaffirm the affinity of hydroxamate ligands for actinide (IV) ions over actinyl (V,VI) ions.

Taylor, Robin J.; Sinkov, Sergey I.; Choppin, Gregory R.; May, Iain

2008-01-15T23:59:59.000Z

152

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

153

Process for the production of ethylidene diacetate from dimethyl ether using a heterogeneous catalyst  

DOE Patents [OSTI]

This invention relates to a process for producing ethylidene diacetate by the reaction of dimethyl ether, acetic acid, hydrogen and carbon monoxide at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that is stable to hydrogenation and comprises an insoluble polymer having pendant quaternized heteroatoms, some of which heteroatoms are ionically bonded to anionic Group VIII metal complexes, the remainder of the heteroatoms 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 3 consecutive runs without loss in activity.

Ramprasad, D.; Waller, F.J.

1998-04-28T23:59:59.000Z

154

Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process  

DOE Patents [OSTI]

The present invention pertains to a process for the coproduction of methanol and dimethyl ether (DME) directly from a synthesis gas in a single step (hereafter, the "single step DME process"). In this process, the synthesis gas comprising hydrogen and carbon oxides is contacted with a dual catalyst system comprising a physical mixture of a methanol synthesis catalyst and a methanol dehydration catalyst. The present invention is an improvement to this process for providing an active and stable catalyst system. The improvement comprises the use of an aluminum phosphate based catalyst as the methanol dehydration catalyst. Due to its moderate acidity, such a catalyst avoids the coke formation and catalyst interaction problems associated with the conventional dual catalyst systems taught for the single step DME process.

Peng, Xiang-Dong (Allentown, PA); Parris, Gene E. (Coopersburg, PA); Toseland, Bernard A. (Allentown, PA); Battavio, Paula J. (Allentown, PA)

1998-01-01T23:59:59.000Z

155

Process for the production of ethylidene diacetate from dimethyl ether using a heterogeneous catalyst  

DOE Patents [OSTI]

This invention relates to a process for producing ethylidene diacetate by the reaction of dimethyl ether, acetic acid, hydrogen and carbon monoxide at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that is stable to hydrogenation and comprises an insoluble polymer having pendant quaternized heteroatoms, some of which heteroatoms are ionically bonded to anionic Group VIII metal complexes, the remainder of the heteroatoms 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 3 consecutive runs without loss in activity.

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

1998-01-01T23:59:59.000Z

156

Derivation of a human equivalent concentration for n-butanol using a physiologically based pharmacokinetic model for n-butyl acetate and metabolites n-butanol and n-butyric acid  

SciTech Connect (OSTI)

The metabolic series (family) approach for risk assessment uses a dosimetry-based analysis to develop toxicity information for a group of metabolically linked compounds using pharmacokinetic (PK) data for each compound and toxicity data for the parent compound. An initial physiologically-based pharmacokinetic (PBPK) model was developed to support the implementation of the metabolic series approach for n-butyl acetate and its subsequent metabolites, n-butanol, and n-butyric acid (the butyl series) (Barton et al. 2000). In conjunction with pilot pharmacokinetic studies, the model was used to design the definitive intravenous (i.v.) PK studies. Rats were implanted with dual indwelling cannulae and administered test compounds by i.v. bolus dose, i.v. infusion, or by inhalation in a recirculating closed chamber. Hepatic, vascular and extravascular metabolic constants for metabolism were estimated by fitting the model to the blood time course data from these experiments. The respiratory bioavailability of n-butyl acetate and n-butanol was estimated from closed chamber inhalation studies and measured ventilation rates. The resulting butyl series PBPK model successfully reproduces the blood time course of these compounds following i.v. administration, and inhalation exposure to n-butyl acetate and n-butanol. A fully scaled human version of the model successfully reproduces arterial blood n-butanol kinetics following inhalation exposure to n-butanol. These validated i.v (rat) and inhalation route models (rat, butyl acetate, n-butanol; human, butanol only) can be used to support species and dose-route extrapolations required for risk assessment of butyl series family of compounds. Further, this work demonstrates the usefulness of i.v. kinetic data for parameterization of systemic metabolism and the value of collaboration between experimentalists and kineticists in the development of PBPK models. The product of this effort, validated rat and human PBPK models for the butyl series compounds, illustrates the effectiveness of broad multi-institutional public/private collaborations in the pursuit of developing state of the art tools for risk assessment.

Teeguarden, Justin G.; Deisinger, P. J.; Poet, Torka S.; English, J C.; Faber, W D.; Barton, H. A.; Corley, Rick A.; Clewell, III, H. J.

2005-05-01T23:59:59.000Z

157

Coordination effect-regulated CO2 capture with an alkali metal onium salts/crown ether system  

SciTech Connect (OSTI)

A coordination effect was employed to realize equimolar CO2 absorption, adopting easily synthesized amino group containing absorbents (alkali metal onium salts). The essence of our strategy was to increase the steric hindrance of cations so as to enhance a carbamic acid pathway for CO2 capture. Our easily synthesized alkali metal amino acid salts or phenolates were coordinated with crown ethers, in which highly sterically hindered cations were obtained through a strong coordination effect of crown ethers with alkali metal cations. For example, a CO2 capacity of 0.99 was attained by potassium prolinate/18-crown-6, being characterized by NMR, FT-IR, and quantum chemistry calculations to go through a carbamic acid formation pathway. The captured CO2 can be stripped under very mild conditions (50 degrees C, N-2). Thus, this protocol offers an alternative for the development of technological innovation towards efficient and low energy processes for carbon capture and sequestration.

Yang, Zhen-Zhen [Nankai University China] [Nankai University China; Jiang, Deen [ORNL] [ORNL; Zhu, Xiang [ORNL] [ORNL; Tian, Chengcheng [ORNL] [ORNL; Brown, Suree [ORNL] [ORNL; Do-Thanh, Chi-Linh [The University of Tennessee] [The University of Tennessee; He, Liang-Nian [Nankai University China] [Nankai University China; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

158

Carbon-carbon bond cleavage of 1,2-hydroxy ethers b7 vanadium(V) dipicolinate complexes  

SciTech Connect (OSTI)

The development of alternatives to current petroleum-based fuels and chemicals is becoming increasingly important due to concerns over climate change, growing world energy demand, and energy security issues. Using non-food derived biomass to produce renewable feedstocks for chemicals and fuels is a particularly attractive possibility. However, the majority of biomass is in the form of lignocellulose, which is often not fully utilized due to difficulties associated with breaking down both lignin and cellulose. Recently, a number of methods have been reported to transform cellulose directly into more valuable materials such as glucose, sorbitol, 5-(chloromethyl)furfural, and ethylene glycol. Less progress has been made with selective transformations of lignin, which is typically treated in paper and forest industries by kraft pulping (sodium hydroxide/sodium sulfide) or incineration. Our group has begun investigating aerobic oxidative C-C bond cleavage catalyzed by dipicolinate vanadium complexes, with the idea that a selective C-C cleavage reaction of this type could be used to produce valuable chemicals or intermediates from cellulose or lignin. Lignin is a randomized polymer containing methoxylated phenoxy propanol units. A number of different linkages occur naturally; one of the most prevalent is the {beta}-O-4 linkage shown in Figure 1, containing a C-C bond with 1,2-hydroxy ether substituents. While the oxidative C-C bond cleavage of 1,2-diols has been reported for a number of metals, including vanadium, iron, manganese, ruthenium, and polyoxometalate complexes, C-C bond cleavage of 1,2-hydroxy ethers is much less common. We report herein vanadium-mediated cleavage of C-C bonds between alcohol and ether functionalities in several lignin model complexes. In order to explore the scope and potential of vanadium complexes to effect oxidative C-C bond cleavage in 1,2-hydroxy ethers, we examined the reactivity of the lignin model complexes pinacol monomethyl ether (A), 2-phenoxyethanol (B), and 1,2-diphenyl-2-methoxyethanol (C) (Figure 1). Reaction of (dipic)V{sup V}(O)O{sup i}Pr (1a) or (dipic)V{sup v}(O)OEt (lb) with A, B, or C in acetonitrile yielded new vanadium(V) complexes where the alcohol-ether ligand was bound in a chelating fashion. From the reaction of 1b with pinacol monomethyl ether (A) in acetonitrile solution, (dipic)V{sup v}(O)(pinOMe) (2) (PinOMe = 2,3-dimethyl-3-methoxy-2-butanoxide) was isolated in 61 % yield. Reaction of 1b with 2-phenoxyethanol (B) in acetonitrile gave the new complex (dipic)V{sup v}(O)(OPE) (3) (OPE = 2-phenoxyethoxide), which was isolated in 76% yield. In a similar fashion, 1a reacted with 1,2-diphenyl-2-methoxyethanol (C) to give (dipic)V(O)(DPME) (4) (DPME = 1,2-diphenyl-2-methoxyethoxide), which was isolated in 39% yield. Complexes 2, 3, and 4 were characterized by {sup 1}H NMR and IR spectroscopy, elemental analysis, and X-ray crystallography. Compared to the previously reported vanadium(V) pinacolate complex (dipic)V(O)(pinOH) the X-ray structure of complex 2 reveals a slightly shorter V = O bond, 1.573(2) {angstrom} vs 1.588(2) {angstrom} for the pinOH structure. Complexes 3 and 4 display similar vanadium oxo bond distances of 1.568(2) {angstrom} and 1.576(2) {angstrom}, respectively. All three complexes show longer bonds to the ether-oxygen trans to the oxo (2.388(2) {angstrom} for 2, 2.547(2) {angstrom} for 3, and 2.438(2) {angstrom} for 4) than to the hydroxy-oxygen in the pinOH structure (2.252(2) {angstrom}).

Hanson, Susan K [Los Alamos National Laboratory; Gordon, John C [Los Alamos National Laboratory; Thorn, David L [Los Alamos National Laboratory; Scott, Brian L [Los Alamos National Laboratory; Baker, R Tom [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

159

Isobaric vapor-liquid equilibria in the systems methyl 1,1-dimethylethyl ether + hexane and + heptane  

SciTech Connect (OSTI)

The vapor-liquid equilibrium at 94 kPa has been determined for the binary systems of methyl 1,1-dimethylethyl ether (MTBE) with hexane and with heptane. Both systems deviate slightly from ideal behavior, can be described as regular solutions, and do not present an azeotrope. The activity coefficients and boiling point of the solutions were correlated with its composition by the Redlich-Kister, Wohl, Wilson, UNIQUAC, NRTL, and Wisniak-Tamir equations.

Wisniak, J.; Magen, E.; Shachar, M.; Zeroni, I.; Segura, H. [Ben-Gurion Univ. of the Negev, Beer-Sheva (Israel). Dept. of Chemical Engineering] [Ben-Gurion Univ. of the Negev, Beer-Sheva (Israel). Dept. of Chemical Engineering; Reich, R. [Univ. de Concepcion (Chile). Dept. of Chemical Engineering] [Univ. de Concepcion (Chile). Dept. of Chemical Engineering

1997-03-01T23:59:59.000Z

160

Challenges for Na-ion Negative Electrodes  

E-Print Network [OSTI]

Na-ion batteries have been proposed as candidates for replacing Li-ion batteries. In this paper we examine the viability of Na-ion negative electrode materials based on Na alloys or hard carbons in terms of volumetric ...

Chevrier, V. L.

Note: This page contains sample records for the topic "butyl ether na" 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

Water Quality  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

which can lead to public health problems. * MtBE (Methyl tert Butyl Ether), a gasoline additive, has begun to contaminate ground water supplies. * Similarly, perchlorate has...

162

E-Print Network 3.0 - allyl methacrylate styrene Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tetrachloroethylene () Cyclohexanol () Cyclohexanone ()1- 1-Butyl alcohol ()2... ;() Acrolein () Acrylic acid () Allyl zlcohol () Allyl chloride () Allyl glycidyl ether(AGE) ()2-...

163

Multiple Objective Stormwater Management For the Coliseum Complex  

E-Print Network [OSTI]

methyl tertiary butyl ether (MTBE) remain in the soil around5.2 ppb xylenes, and 160 ppb MTBE remain in the groundwater

Jones, Jesse; Kraai, Rachel

2009-01-01T23:59:59.000Z

164

Stratospheric ozone, global warming, and the principle of unintended consequences - an ongoing science and policy story  

E-Print Network [OSTI]

as methyl-tert-butyl ether (MTBE), lubricating oil and itsthe environment. Use of the MTBE additive in gasoline wasof gasoline laced with MTBE into groundwater resulted in

2013-01-01T23:59:59.000Z

165

The Drinking Water Security and Safety Amendments of 2002: Is America's Drinking Water Infrastructure Safer Four Years Later?  

E-Print Network [OSTI]

355 tertiary butyl ether ("MTBE"). 43 8 Amazingly, even "[c]Water: Study Estimates Cost of MTBE Remedia- tion At Up to $

Shermer, Steven D.

2006-01-01T23:59:59.000Z

166

Agricultural and Resource Economics Update  

E-Print Network [OSTI]

tertiary butyl ether (MTBE), a natural-gas derivative, werebattle between advocates for ethanol and those for MTBE.MTBE became the dominant additive because it was less

Smith, Aaron; Zilberman, David; Saitone, Tina; Sexton, Richard J.

2012-01-01T23:59:59.000Z

167

Biomass burning and urban air pollution over the Central Mexican Plateau  

E-Print Network [OSTI]

the urban tracers (e.g. C 2 H 2 , MTBE, toluene) are highlymethyl tert-butyl ether (MTBE) because their shorter atmo-

2009-01-01T23:59:59.000Z

168

Effects of water chemistry on NF/RO membrane structure and performance  

E-Print Network [OSTI]

methyl tert-butyl ether (MTBE), benzene, ethylbenzene,TCE** Industrial C 2 HCl 3 MTBE** [48] Industrial C 5 H 12 O

Mo, Yibing

2013-01-01T23:59:59.000Z

169

Cometabolic bioremediation  

E-Print Network [OSTI]

Intrinsic bioremediation of MTBE-contaminated groundwater atcontaminants, e.g. PCE, TCE, MTBE, TNT, dioxane, atrazine,Methyl tert-butyl ether (MTBE) has also been remediated

Hazen, Terry C.

2010-01-01T23:59:59.000Z

170

First Annual U.S. Department of Energy Office of Science Joint Genome Institute User Meeting  

E-Print Network [OSTI]

Genome Analysis of MTBE-Degrading Beta- Proteobacteriummethyl tert- butyl ether (MTBE). Strain PM1 can alsooften co-contaminants with MTBE in groundwater, including

Various

2006-01-01T23:59:59.000Z

171

Thermophysical properties of 2,2,2-trifluoroethanol + tetraethylene glycol dimethyl ether  

SciTech Connect (OSTI)

Isothermal P,x data from 303.15 K to 423.15 K, liquid densities from 283.15 K to 423.15 K, and dynamic viscosities from 343.15 K to 393.15 K for the binary system 2,2,2-trifluoroethanol + tetraethylene glycol dimethyl ether were measured. The vapor-liquid equilibrium (VLE) data were measured. The vapor-liquid equilibrium (VLE) data were measured using a static apparatus. VLE data were correlated by the five-parameter NRTL equation, while density and kinematic viscosity data were correlated with temperature and liquid composition using empirical equations. The viscosity data used in the correlation cover the range of 293.15--393.15 K. VLE data indicate that this binary system exhibits large negative deviations from Raoult`s law. These mixtures present large exothermic excess molar enthalpies. The excess molar enthalpy calculated using the Gibbs-Helmholtz equation and the NRTL parameters was compared with experimental data existing in the literature.

Herraiz, J.; Olive, F.; Zhu, S.; Shen, S.; Coronas, A. [Univ. Rovira i Virgili, Tarragona (Spain). Dept. of Mechanical Engineering] [Univ. Rovira i Virgili, Tarragona (Spain). Dept. of Mechanical Engineering

1999-07-01T23:59:59.000Z

172

() Trichloromethane ()1,1,2,2-1,1,2,2-Tetrachloroethane  

E-Print Network [OSTI]

acetate () Ethylene glycol monobutyl ether () Ethylene glycol monomethy ether ()- O-dichlorobenzene ( ) Xylenes(o-,m-,p- isomers) () Cresol - 19 - #12;() Chlorobenzene () Amyl acetate () Isoamyl acetate () Isobutyl acetate () Isopropyl acetate () Ethyl acetate () Propyl acetate () Butyl acetate () Methyl acetate

Huang, Haimei

173

Pyrolysis of Organic Molecules Relevant to Combustion as Monitored by Photoionization Time-of-Flight Mass Spectrometry  

E-Print Network [OSTI]

is observed, which is similar to MTBE in this system whichisobutene formed from MTBE, is found to occur. REFERENCES [methyl tert-butyl ether (MTBE) and tert-amyl methyl ether (

Weber, Kevin Howard

2010-01-01T23:59:59.000Z

174

Modeling of the simultaneous extraction of nitric acid and uranyl nitrate with tri-n-butyl phosphate. Application to extraction operation  

SciTech Connect (OSTI)

A mathematical model developed for the equilibrium HNO{sub 3}-UO{sub 2}(NO{sub 3}){sub 2}-tri-n-butyl phosphate (TBP)-diluent is the basis of the computation of distribution isotherms. The isotherms are used to study the influence of TBP concentration on two chosen operation parameters, distribution coefficients and number of theoretical stages, for the selected flow sheets. It is established that an increase in TBP concentration leads to a decrease in the number of theoretical stages for the extraction flow sheets but to their increase for the striping flow sheets. Given diagrams can be used to determine the efficiency of extraction processes. Agreement with available literature calculations on the number of theoretical stages supports the use of the model in the computation of distribution isotherms, of the system quoted above, in a wide range of nitric acid, uranyl nitrate, and TBP concentrations.

Comor, J.J.; Tolic, A.S.; Kopecni, M.M.; Petkovic, D.M. [Vinca Inst. of Nuclear Sciences, Belgrade (Yugoslavia). Chemical Dynamics Lab.] [Vinca Inst. of Nuclear Sciences, Belgrade (Yugoslavia). Chemical Dynamics Lab.

1999-01-01T23:59:59.000Z

175

Thermally Switchable Thin Films of an ABC Triblock Copolymer of Poly(n-butyl methacrylate)-poly(methyl methacrylate)-poly(2-fluoroethyl methacrylate)  

SciTech Connect (OSTI)

The thermo-responsive behavior of polymer films consisting of novel linear triblock copolymers of poly(n-butyl methacrylate)-poly(methyl methacrylate)-poly(2-fluoroethyl methacrylate) (PnBuMA-PMMA-P2FEMA) are reported using differential scanning calorimetry (DSC), atomic forcing microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and contacting angle (CA) measurements. The surface morphology, wettability and chemical structure of thin films of these triblock copolymers on silicon wafers as a function of temperature have been investigated. It has been shown that the wettability of the films is thermally switchable. Detailed structural analysis shows that thermo-responsive surface composition changes are produced. The underlying mechanism of the thermoresponsive behavior is discussed.

Zhang, Shanju [Georgia Institute of Technology; Liu, Zhan [Georgia Institute of Technology; Bucknall, David G. [Georgia Institute of Technology; He, Lihong [ORNL; Hong, Kunlun [ORNL; Mays, Jimmy [ORNL; Allen, Mark [Georgia Institute of Technology

2011-01-01T23:59:59.000Z

176

Aithisg Bhliadhnail Coilltearachd na h-Alba  

E-Print Network [OSTI]

' toirt thugaibh Lirmheas Bliadhnail ghdarras Coilltearachd na h-Alba 2007-08. B' e seo a' chiad bliadhna. Tha mise a' meas an Lirmheas seo mar `iris dhealbhach' an cois na h-Aithisg Bhliadhnail agus ghdarras na Coilltearachd a bhith danamh cinnteach gu lean an fhs seo agus gum bi e na bhuannachd do

177

Mechanistic Investigation of Acid-Catalyzed Cleavage of Aryl-Ether Linkages: Implications for Lignin Depolymerization  

SciTech Connect (OSTI)

Carbon-oxygen bonds are the primary inter-monomer linkages lignin polymers in plant cell walls, and as such, catalyst development to cleave these linkages is of paramount importance to deconstruct biomass to its constituent monomers for the production of renewable fuels and chemicals. For many decades, acid catalysis has been used to depolymerize lignin. Lignin is a primary component of plant cell walls, which is connected primarily by aryl-ether linkages, and the mechanism of its deconstruction by acid is not well understood, likely due to its heterogeneous and complex nature compared to cellulose. For effective biomass conversion strategies, utilization of lignin is of significant relevance and as such understanding the mechanisms of catalytic lignin deconstruction to constituent monomers and oligomers is of keen interest. Here, we present a comprehensive experimental and theoretical study of the acid catalysis of a range of dimeric species exhibiting the b-O-4 linkage, the most common inter-monomer linkage in lignin. We demonstrate that the presence of a phenolic species dramatically increases the rate of cleavage in acid at 150 degrees C. Quantum mechanical calculations on dimers with the para-hydroxyl group demonstrate that this acid-catalyzed pathway differs from the nonphenolic dimmers. Importantly, this result implies that depolymerization of native lignin in the plant cell wall will proceed via an unzipping mechanism wherein b-O-4 linkages will be cleaved from the ends of the branched, polymer chains inwards toward the center of the polymer. To test this hypothesis further, we synthesized a homopolymer of b-O-4 with a phenolic hydroxyl group, and demonstrate that it is cleaved in acid from the end containing the phenolic hydroxyl group. This result suggests that genetic modifications to lignin biosynthesis pathways in plants that will enable lower severity processes to fractionate lignin for upgrading and for easier access to the carbohydrate fraction of the plant cell wall.

Sturgeon, M. R.; Kim, S.; Chmely, S. C.; Foust, T. D.; Beckham, G. T.

2013-01-01T23:59:59.000Z

178

The lightness of being: mass, ether, and unification of the forces  

SciTech Connect (OSTI)

How can an electron be both a wave and a particle? At the same time? Because it is a quantum field. That key insight seems to be underappreciated, given the awe and mysticism that permeate most nontechnical discussions of modern physics. Perhaps the root of the problem is that most popularizations of quantum mechanics and of particle physics shy away from quantized fields, the natural language for microscopic phenomena. In 'The Lightness of Being: Mass, Ether, and the Unification of Forces', Frank Wilczek confronts quantum field theory head on, demystifying not only wave-particle duality but also the origin of mass for hadrons (that is, everyday matter). Wilczek is the Herman Feshbach Professor of Physics at MIT and a co-recipient of the 2004 Nobel Prize in Physics. His research has spanned almost all aspects of theoretical particle physics, with significant forays into condensed-matter physics and dense nuclear matter (condensed quark matter, one might say). Recurring themes are the richness of quantum chromodynamics (QCD) and the alluring ideas of unification. His breadth and depth make him a sought after speaker for colloquia and public lectures. Wilczek also contributes an occasional Reference Frame column to 'Physics Today'. The material in 'The Lightness of Being' reflects the scope of the author's research. The book consists of three parts: the quantum fields of QCD (the ether that makes mass), gravitation (the ether that feels mass), and unification. Part 1, which traces notions of mass from Isaac Newton's time through theoretical and computational results of the past 40 years, is the most substantial and original; it is rich, modern, and rooted in observed phenomena. Part 2 continues in the same vein as it connects gravity, also an observed phenomenon, to QCD. Part 3 is more conventional, for a popularization of particle physics, in its focus on speculative ideas that (still) await direct experimental tests. Readers of 'Physics Today' will know that Wilczek can write with wit, grace, and an uncanny facility for using lightweight language to express heavy-duty ideas. They will find much of that kind of writing in 'The Lightness of Being'. Wilczek addresses subtle ideas with vim and vigor. He avoids some of the jargon of quantum field theory; for example, he calls the vertex in a Feynman diagram a hub. In more ambitious terminology, he refers to space-filling, everfluctuating quantum fields--be they electrons, quarks, gluons, or gravity--as 'the Grid'. The term is supposed to be short and familiar, evoking the ubiquitous electric grid (and soon-to-beubiquitous computing grid). It also, for the expert, cleverly alludes to lattice gauge theory. Indeed, after vividly explaining how the dynamics of QCD and the constraints of Heisenberg uncertainty conspire to create mass from the Grid, Wilczek emphasizes that the picture is backed by lattice QCD computations of 'heroic' proportions. Unfortunately, too much of 'The Lightness' is laden with clunky affectation: silly names (a pulsed electron accelerator is called the 'ultrastroboscopic nanomicroscope'), sophomoric jokes ('hadron' is 'not a typo'), references to pop culture (Wilczek might have called quantum fields 'the Matrix, but the sequels tarnished that candidate'), and many pointless footnotes. In a public lecture the audience may guffaw at such jokes, but on the printed page they fall flat. Wilczek explains physics so well that the inappropriate humor is the biggest unexplained puzzle of the book. It is fine to be silly, even crude, as long as the reader's path to understanding is made easier. A joke can inform with an unexpected perspective or simply give the mind a pause to refresh. Some of the humor achieves such aims, but too many gags impede the pace of the otherwise fine exposition. Three appendices, a glossary, and a set of endnotes are crisp and sober. They are excellent. 'The Lightness of Being' is not unbearable, but it is weighed down with too much clutter to rank as a masterpiece. It's a pity: Wilczek's best writing--some of it in this book--is l

Kronfeld, Andreas S.

2009-03-01T23:59:59.000Z

179

NA61/SHINE ion program  

E-Print Network [OSTI]

The Super Proton Synchrotron (SPS) at CERN covers one of the most interesting regions of the phase diagram (T - \\mu_{B}) of strongly interacting matter. The study of central Pb+Pb collisions by NA49 indicate that the threshold for deconfinement is reached already at the low SPS energies. Theoretical considerations predict a critical point of strongly interacting matter at energies accessible at the SPS. The NA61/SHINE experiment, a successor of the NA49 project, will study hadron production in p+p, p+A, h+A, and A+A reactions at various energies. The broad physics program includes the investigation of the properties of strongly interacting matter, as well as precision measurements of hadron spectra for the T2K neutrino experiment and for the Pierre Auger Observatory and KASCADE cosmic-ray projects. The main physics goals of the NA61/SHINE ion program are to study the properties of the onset of deconfinement at low SPS energies and to find signatures of the critical point of strongly interacting matter. To achieve these goals a broad range in the (T - \\mu_{B}) phase diagram will be covered by performing an energy (10A-158A GeV/c) and system size (p+p, B+C, Ar+Ca, Xe+La) scan. The first data for this 2-D scan were taken in 2009, i.e. p+p interactions at 20, 30, 40, 80, 158 GeV/c beam energy. This contribution will summarize physics arguments for the NA61/SHINE ion program, show the detector performance and present the current status of the experiment and plans for the next years.

Maja Mackowiak for the NA61 Collaboration

2010-09-06T23:59:59.000Z

180

Transport study of hafnium(IV) and zirconium(IV) ions mutual separation by using Tri-n-butyl phosphate-xylene-based supported liquid membranes  

SciTech Connect (OSTI)

A Hf transport study through supported liquid membranes has been carried out to determine flux and permeability data for this metal ion. Tri-n-butyl phosphate (TBP)-xylene-based liquid membranes supported in polypropylene hydrophobic microporous film have been used. These data for hafnium and the previous data for zirconium have furnished the Zr to Hf flux ratio (S) as a function of nitric acid and TBP concentrations of the order of 12 in a single stage at room temperature. Optimum conditions for the separation of these two metal ions appear to 5-6 TBP mol/dm{sup 3} HNO{sub 3}, concentrations {le} 2.93 mol/dm{sup 3}, and 10C. The value of S from an aqueous solution containing 2.4% Hf with respect to Zr has been found to be >125 at 10C and 1.78 mol/dm{sup 3} TBP concentration in the membrane. The technique appears to be feasible for purification of Zr respect to Hf or vice versa.

Chaudry, M.A.; Ahmed, B. (Pakistan Inst. of Nuclear Science and Technology, Islamabad (Pakistan))

1992-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Fluctuating micro-heterogeneity in watertert-butyl alcohol mixtures and lambda-type divergence of the mean cluster size with phase transition-like multiple anomalies  

SciTech Connect (OSTI)

Watertert-butyl alcohol (TBA) binary mixture exhibits a large number of thermodynamic and dynamic anomalies. These anomalies are observed at surprisingly low TBA mole fraction, with x{sub TBA} ? 0.030.07. We demonstrate here that the origin of the anomalies lies in the local structural changes that occur due to self-aggregation of TBA molecules. We observe a percolation transition of the TBA molecules at x{sub TBA} ? 0.05. We note that islands of TBA clusters form even below this mole fraction, while a large spanning cluster emerges above that mole fraction. At this percolation threshold, we observe a lambda-type divergence in the fluctuation of the size of the largest TBA cluster, reminiscent of a critical point. Alongside, the structure of water is also perturbed, albeit weakly, by the aggregation of TBA molecules. There is a monotonic decrease in the tetrahedral order parameter of water, while the dipole moment correlation shows a weak nonlinearity. Interestingly, water molecules themselves exhibit a reverse percolation transition at higher TBA concentration, x{sub TBA} ? 0.45, where large spanning water clusters now break-up into small clusters. This is accompanied by significant divergence of the fluctuations in the size of largest water cluster. This second transition gives rise to another set of anomalies around. Both the percolation transitions can be regarded as manifestations of Janus effect at small molecular level.

Banerjee, Saikat; Furtado, Jonathan; Bagchi, Biman, E-mail: bbagchi@sscu.iisc.ernet.in [SSCU, Indian Institute of Science, Bangalore 560012 (India)] [SSCU, Indian Institute of Science, Bangalore 560012 (India)

2014-05-21T23:59:59.000Z

182

Low-temperature CVD of iron, cobalt, and nickel nitride thin films from bis[di(tert-butyl)amido]metal(II) precursors and ammonia  

SciTech Connect (OSTI)

Thin films of late transition metal nitrides (where the metal is iron, cobalt, or nickel) are grown by low-pressure metalorganic chemical vapor deposition from bis[di(tert-butyl)amido]metal(II) precursors and ammonia. These metal nitrides are known to have useful mechanical and magnetic properties, but there are few thin film growth techniques to produce them based on a single precursor family. The authors report the deposition of metal nitride thin films below 300?C from three recently synthesized M[N(t-Bu){sub 2}]{sub 2} precursors, where M?=?Fe, Co, and Ni, with growth onset as low as room temperature. Metal-rich phases are obtained with constant nitrogen content from growth onset to 200?C over a range of feedstock partial pressures. Carbon contamination in the films is minimal for iron and cobalt nitride, but similar to the nitrogen concentration for nickel nitride. X-ray photoelectron spectroscopy indicates that the incorporated nitrogen is present as metal nitride, even for films grown at the reaction onset temperature. Deposition rates of up to 18?nm/min are observed. The film morphologies, growth rates, and compositions are consistent with a gas-phase transamination reaction that produces precursor species with high sticking coefficients and low surface mobilities.

Cloud, Andrew N.; Abelson, John R., E-mail: abelson@illinois.edu [Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 201 Materials Science and Engineering Building, 1304 W. Green St., Urbana, Illinois 61801 (United States); Davis, Luke M.; Girolami, Gregory S., E-mail: girolami@scs.illinois.edu [School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, Illinois 61801 (United States)

2014-03-15T23:59:59.000Z

183

Fluctuating micro-heterogeneity in water - tert-butyl alcohol mixtures and lambda-type divergence of the mean cluster size with phase transition-like multiple anomalies  

E-Print Network [OSTI]

Water - tert-butyl alcohol (TBA) binary mixture exhibits a large number of thermodynamic and dynamic anomalies. These anomalies are observed at surprisingly low TBA mole fraction, with $x_{\\text{TBA}} \\approx 0.03 - 0.07$. We demonstrate here that the origin of the anomalies lies in the local structural changes that occur due to self-aggregation of TBA molecules. We observe a percolation transition of the TBA molecules at $x_{\\text{TBA}} \\approx 0.05$. We note that "islands" of TBA clusters form even below this mole fraction, while a large spanning cluster emerges above that mole fraction. At this percolation threshold, we observe a lambda-type divergence in the fluctuation of the size of the largest TBA cluster, reminiscent of a critical point. Alongside, the structure of water is also perturbed, albeit weakly, by the aggregation of TBA molecules. There is a monotonic decrease in the tetrahedral order parameter of water, while the dipole moment correlation shows a weak non-linearity. Interestingly, water molecules themselves exhibit a reverse percolation transition at higher TBA concentration, $x_{\\text{TBA}} \\approx 0.45$, where large spanning water clusters now break-up into small clusters. This is accompanied by significant divergence of the fluctuations in the size of largest water cluster. This second transition gives rise to another set of anomalies around. Both the percolation transitions can be regarded as manifestations of Janus effect at small molecular level.

Saikat Banerjee; Jonathan Furtado; Biman Bagchi

2014-02-20T23:59:59.000Z

184

Monitoring synaptic protein dynamics with higher temporal, spatial, and molecular resolution  

E-Print Network [OSTI]

Spectrometry mSOG MiniSOG MTBE Methyl tert-butyl ether mTORMethyl tert-butyl ether (MTBE, 1.4 mL) was then added for1,000 g, 5 min). The MTBE layer was collected into a 1.5-mL

Butko, Margaret

2012-01-01T23:59:59.000Z

185

UNIVERSITY OF CALIFORNIA Santa Barbara  

E-Print Network [OSTI]

, B. Dooher, and D. Rice, Analysis of dissolved benzene plumes and methyl tertiary butyl ether (MTBE, An evaluation of MTBE impacts to California groundwater resources, pp. 68 p., Lawrence Livermore National, Temporal Analysis of Methyl Tertiary Butyl Ether (MTBE) Plumes at California Leaking Underground Fuel tank

California at Santa Barbara, University of

186

(2/94)(2-4,9/95)(7/97)(11,12/98)(1,9,11/99) Neuman Chapter 3 Haloalkanes, Alcohols, Ethers, and Amines  

E-Print Network [OSTI]

, Ethers, and Amines from Organic Chemistry by Robert C. Neuman, Jr. Professor of Chemistry, emeritus://web.chem.ucsb.edu/~neuman/orgchembyneuman/> Chapter Outline of the Book ************************************************************************************** I. Foundations 1. Organic Molecules and Chemical Bonding 2. Alkanes and Cycloalkanes 3. Haloalkanes

Reed, Christopher A.

187

Single-Step Syngas-to-Distillates (S2D) Synthesis via Methanol and Dimethyl Ether Intermediates: Final Report  

SciTech Connect (OSTI)

The objective of the work was to enhance price-competitive, synthesis gas (syngas)-based production of transportation fuels that are directly compatible with the existing vehicle fleet (i.e., vehicles fueled by gasoline, diesel, jet fuel, etc.). To accomplish this, modifications to the traditional methanol-to-gasoline (MTG) process were investigated. In this study, we investigated direct conversion of syngas to distillates using methanol and dimethyl ether intermediates. For this application, a Pd/ZnO/Al2O3 (PdZnAl) catalyst previously developed for methanol steam reforming was evaluated. The PdZnAl catalyst was shown to be far superior to a conventional copper-based methanol catalyst when operated at relatively high temperatures (i.e., >300C), which is necessary for MTG-type applications. Catalytic performance was evaluated through parametric studies. Process conditions such as temperature, pressure, gas-hour-space velocity, and syngas feed ratio (i.e., hydrogen:carbon monoxide) were investigated. PdZnAl catalyst formulation also was optimized to maximize conversion and selectivity to methanol and dimethyl ether while suppressing methane formation. Thus, a PdZn/Al2O3 catalyst optimized for methanol and dimethyl ether formation was developed through combined catalytic material and process parameter exploration. However, even after compositional optimization, a significant amount of undesirable carbon dioxide was produced (formed via the water-gas-shift reaction), and some degree of methane formation could not be completely avoided. Pd/ZnO/Al2O3 used in combination with ZSM-5 was investigated for direct syngas-to-distillates conversion. High conversion was achieved as thermodynamic constraints are alleviated when methanol and dimethyl are intermediates for hydrocarbon formation. When methanol and/or dimethyl ether are products formed separately, equilibrium restrictions occur. Thermodynamic relaxation also enables the use of lower operating pressures than what would be allowed for methanol synthesis alone. Aromatic-rich hydrocarbon liquid (C5+), containing a significant amount of methylated benzenes, was produced under these conditions. However, selectivity control to liquid hydrocarbons was difficult to achieve. Carbon dioxide and methane formation was problematic. Furthermore, saturation of the olefinic intermediates formed in the zeolite, and necessary for gasoline production, occurred over PdZnAl. Thus, yield to desirable hydrocarbon liquid product was limited. Evaluation of other oxygenate-producing catalysts could possibly lead to future advances. Potential exists with discovery of other types of catalysts that suppress carbon dioxide and light hydrocarbon formation. Comparative techno-economics for a single-step syngas-to-distillates process and a more conventional MTG-type process were investigated. Results suggest operating and capital cost savings could only modestly be achieved, given future improvements to catalyst performance. Sensitivity analysis indicated that increased single-pass yield to hydrocarbon liquid is a primary need for this process to achieve cost competiveness.

Dagle, Robert A.; Lebarbier, Vanessa MC; Lizarazo Adarme, Jair A.; King, David L.; Zhu, Yunhua; Gray, Michel J.; Jones, Susanne B.; Biddy, Mary J.; Hallen, Richard T.; Wang, Yong; White, James F.; Holladay, Johnathan E.; Palo, Daniel R.

2013-11-26T23:59:59.000Z

188

A pulsed field gradient and NMR imaging investigations of the water retention mechanism by cellulose ethers in mortars  

SciTech Connect (OSTI)

The study presented in this paper is devoted to improve the knowledge on the influence of cellulose ethers (CE) on the freshly-mixed mortars water retention. Indeed, this crucial property is the most important imparted by these polysaccharides. One of the assumptions proposed to explain this phenomenon is that CE acts as diffusion barrier to the water. To test this hypothesis, the CE effect on the self-diffusion coefficient of water in solution and on the water mobility between two fresh cement pastes was studied by Nuclear Magnetic Resonance. CE does not significantly modify the water self-diffusion coefficient in CE solution or in admixed cement pastes. Moreover the interdiffusion imaging experiments demonstrated that the water diffusion at the paste/paste interface is not affected by the presence of cellulosic admixture.

Patural, Laetitia, E-mail: patural@emse.f [Ecole Nationale Superieure des Mines de Saint-Etienne, Centre SPIN, LPMG UMR 5148, 158 cours Fauriel, F-42023 Saint-Etienne Cedex 2 (France); Porion, Patrice [Centre de la Recherche sur la Matiere Divisee, CNRS-Universite d'Orleans, UMR 6619, 1b rue de la Ferollerie, F-45071 Orleans Cedex 2 (France); Van Damme, Henri [Laboratoire de Physico-chimie des Polymeres et Milieux Disperses, ESPCI ParisTech, 10 rue Vauquelin, F-75231 Paris Cedex 05 and Universite Paris Est - LCPC, 58 boulevard Lefebvre, 75732 Paris cedex 15 (France); Govin, Alexandre; Grosseau, Philippe [Ecole Nationale Superieure des Mines de Saint-Etienne, Centre SPIN, LPMG UMR 5148, 158 cours Fauriel, F-42023 Saint-Etienne Cedex 2 (France); Ruot, Bertrand; Deves, Olivier [Universite Paris-Est, Centre Scientifique et Technique du Batiment, Departement Enveloppe et Revetements/Division Enduits, Mortiers et Colles, 84 avenue Jean Jaures, F-77447 Marne-la-Vallee Cedex 2 (France)

2010-09-15T23:59:59.000Z

189

Is Embolization of the Pancreas Safe? Pancreatic Histological Changes after Selective Transcatheter Arterial Embolization with N-Butyl Cyanoacrylate in a Swine Model  

SciTech Connect (OSTI)

Purpose: This study was designed to evaluate the safety of selective transcatheter arterial embolization (TAE) with N-butyl cyanoacrylate (NBCA) in a swine model in terms of histological changes in the pancreas. Methods: Three groups of two female swine (58-64 kg) per group underwent TAE of the dorsal pancreatic artery, under anesthesia, with 1:1, 1:4, and 1:9 mixtures of NBCA and iodized oil. Blood parameters were evaluated at days 1, 4, and 10 after TAE, after which the animals were sacrificed and pancreatic tissues were examined under light microscopy. Results: All of the animals were asymptomatic and survived for 10 days. Cone beam computed tomographic angiography revealed occlusion of the dorsal pancreatic artery and no enhancement in the embolized area. The white blood cell count and C-reactive protein level were elevated slightly on day 1 after TAE (mean {+-} SD: 252.7 {+-} 27.8 Multiplication-Sign 10{sup 2}/{mu}l and 0.15 {+-} 0.07 mg/l, respectively), but they normalized or remained near the upper normal limit thereafter. The serum amylase and lipase levels also were elevated on day 1 (8831.7 {+-} 2169.2 U/l and 130 {+-} 53.4 U/l, respectively) but normalized thereafter. Histologically, necrosis and fibrosis were noted only in the embolized segment, and necrosis and acute inflammatory reactions were absent in the nonembolized segment. The border between both segments was well defined. Lymphocytic infiltration and foreign body reaction were noted around the embolized vessels. Conclusions: Selective TAE with NBCA in the pancreas caused localized ischemic necrosis without clinically significant pancreatitis; therefore, this procedure is tolerable in swine.

Okada, Takuya, E-mail: okabone@gmail.com; Yamaguchi, Masato [Kobe University Graduate School of Medicine, Department of Radiology (Japan); Takahashi, Takuya [Kobe Red Cross Hospital, Department of Pathology (Japan); Izaki, Kenta; Uotani, Kensuke; Sakamoto, Noriaki; Sugimura, Kazuro; Sugimoto, Koji [Kobe University Graduate School of Medicine, Department of Radiology (Japan)

2012-02-15T23:59:59.000Z

190

Enol Ethers as Substrates for Efficient Z- and Enantioselective Ring-Opening/Cross-Metathesis Reactions Promoted by Stereogenic-at-Mo Complexes: Utility in Chemical Synthesis and Mechanistic Attributes  

E-Print Network [OSTI]

The first examples of catalytic enantioselective ring-opening/cross-metathesis (EROCM) reactions that involve enol ethers are reported. Specifically, we demonstrate that catalytic EROCM of several oxa- and azabicycles, ...

Yu, Miao

191

Toxicity of polychlorinated diphenyl ethers in hydra attenuata and in rat whole-embryo culture. Master's thesis  

SciTech Connect (OSTI)

Polychlorinated diphenyl ethers (PCDEs) are a class of biaryl compounds that have little commercial application, but appear to be widespread in the environment. They have been found in wood preservative waste dumpsites and in fly ash from municipal waste incinerators. They have been detected in bird eggs and tissues, fish, and other edible marine organisms in the United States, Canada, and Europe. There are limited reports in the extant literature on the toxicity of PCDEs. This study was designed to evaluate the toxicity of selected PCDEs in cultures of Hydra attenuata and post-implantation rat whole embryos. The toxicity of several closely related polychlorinated biphenyls (PCBs) was evaluated in both cultures and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was evaluated in whole embryo culture. Embryonic growth and development parameters (yolk sac diameter, crown-rump length, somite count, and DNA and protein content) and gross morphology were determined. Findings indicated that these chemicals were neither embryotoxic nor teratogenic. Thus, the PCDEs, which elicit other diverse toxic and biochemical responses in rodents, are relatively inactive in these bioassays for developmental toxicity.

Becker, M.C.

1991-05-01T23:59:59.000Z

192

Monodisperse porous polymer particles containing macrocyclic ether as a new class of sorbent for SR(II) separation  

SciTech Connect (OSTI)

Strontium{sup 90} is one of the typical fission products that may be found in high level liquid waste (HLLW). Separation of Sr{sup 90} prior to the vitrification is beneficial to the final treatment of solid radioactive waste. In this study, a new class of sorbent for Sr(II) was developed by loading the macrocyclic ether DtBuCH18C6 into the monodisperse porous polymer particles (MPPPs). The MPPPs are well-known as a promising chromatographic material due to the uniform particle size, porous morphology, good compatibility with organic extractants, and rigid matrix. The structure and micro-morphology of the sorbent particles were characterized. The adsorption behavior towards Sr(II) in HNO{sub 3} media was investigated by both batch and column experiments. High adsorption efficiency and selective separation of Sr(II) was obtained. The sorbent particles can be recycled for at least several times before obvious lose of the adsorption ability. This kind of sorbent possesses the potential to be used for strontium separation in radioactive liquid waste.

Leng, Yuxiao; Bai, Feifei [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China); Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing 100084 (China); Ye, Gang; Wei, Jichao; Wang, Jianchen; Chen, Jing [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China)

2013-07-01T23:59:59.000Z

193

Investigation of HCCI Combustion of Diethyl Ether and Ethanol Mixtures Using Carbon 14 Tracing and Numerical Simulations  

SciTech Connect (OSTI)

Despite the rapid combustion typically experienced in Homogeneous Charge Compression Ignition (HCCI), components in fuel mixtures do not ignite in unison or burn equally. In our experiments and modeling of blends of diethyl ether (DEE) and ethanol (EtOH), the DEE led combustion and proceeded further toward completion, as indicated by {sup 14}C isotope tracing. A numerical model of HCCI combustion of DEE and EtOH mixtures supports the isotopic findings. Although both approaches lacked information on incompletely combusted intermediates plentiful in HCCI emissions, the numerical model and {sup 14}C tracing data agreed within the limitations of the single zone model. Despite the fact that DEE is more reactive than EtOH in HCCI engines, they are sufficiently similar that we did not observe a large elongation of energy release or significant reduction in inlet temperature required for light-off, both desired effects for the combustion event. This finding suggests that, in general, HCCI combustion of fuel blends may have preferential combustion of some of the blend components.

Mack, J H; Dibble, R W; Buchholz, B A; Flowers, D L

2004-01-16T23:59:59.000Z

194

Calcitriol inhibits Ether-a go-go potassium channel expression and cell proliferation in human breast cancer cells  

SciTech Connect (OSTI)

Antiproliferative actions of calcitriol have been shown to occur in many cell types; however, little is known regarding the molecular basis of this process in breast carcinoma. Ether-a-go-go (Eag1) potassium channels promote oncogenesis and are implicated in breast cancer cell proliferation. Since calcitriol displays antineoplastic effects while Eag1 promotes tumorigenesis, and both factors antagonically regulate cell cycle progression, we investigated a possible regulatory effect of calcitriol upon Eag1 as a mean to uncover new molecular events involved in the antiproliferative activity of this hormone in human breast tumor-derived cells. RT real-time PCR and immunocytochemistry showed that calcitriol suppressed Eag1 expression by a vitamin D receptor (VDR)-dependent mechanism. This effect was accompanied by inhibition of cell proliferation, which was potentiated by astemizole, a nonspecific Eag1 inhibitor. Immunohistochemistry and Western blot demonstrated that Eag1 and VDR abundance was higher in invasive-ductal carcinoma than in fibroadenoma, and immunoreactivity of both proteins was located in ductal epithelial cells. Our results provide evidence of a novel mechanism involved in the antiproliferative effects of calcitriol and highlight VDR as a cancer therapeutic target for breast cancer treatment and prevention.

Garcia-Becerra, Rocio [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico); Diaz, Lorenza, E-mail: lorenzadiaz@gmail.com [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico); Camacho, Javier [Department of Pharmacology, Centro de Investigacion y de Estudios Avanzados, Instituto Politecnico Nacional, Av. Instituto Politecnico Nacional 2508, San Pedro Zacatenco 07360, Mexico, D.F. (Mexico)] [Department of Pharmacology, Centro de Investigacion y de Estudios Avanzados, Instituto Politecnico Nacional, Av. Instituto Politecnico Nacional 2508, San Pedro Zacatenco 07360, Mexico, D.F. (Mexico); Barrera, David; Ordaz-Rosado, David; Morales, Angelica [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico); Ortiz, Cindy Sharon [Department of Pathology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Pathology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico); Avila, Euclides [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico); Bargallo, Enrique [Department of Breast Tumors, Instituto Nacional de Cancerologia, Av. San Fernando No. 22, Tlalpan 14080, Mexico, D.F. (Mexico)] [Department of Breast Tumors, Instituto Nacional de Cancerologia, Av. San Fernando No. 22, Tlalpan 14080, Mexico, D.F. (Mexico); Arrecillas, Myrna [Department of Pathology, Instituto Nacional de Cancerologia, Av. San Fernando No. 22, Tlalpan 14080, Mexico, D.F. (Mexico)] [Department of Pathology, Instituto Nacional de Cancerologia, Av. San Fernando No. 22, Tlalpan 14080, Mexico, D.F. (Mexico); Halhali, Ali; Larrea, Fernando [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)] [Department of Reproductive Biology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Vasco de Quiroga No. 15, Tlalpan 14000 Mexico, D.F. (Mexico)

2010-02-01T23:59:59.000Z

195

Synergistic effect of mixing dimethyl ether with methane, ethane, propane, and ethylene fuels on polycyclic aromatic hydrocarbon and soot formation  

SciTech Connect (OSTI)

Characteristics of polycyclic aromatic hydrocarbon (PAH) and soot formation in counterflow diffusion flames of methane, ethane, propane, and ethylene fuels mixed with dimethyl ether (DME) have been investigated. Planar laser-induced incandescence and fluorescence techniques were employed to measure relative soot volume fractions and PAH concentrations, respectively. Results showed that even though DME is known to be a clean fuel in terms of soot formation, DME mixture with ethylene fuel increases PAH and soot formation significantly as compared to the pure ethylene case, while the mixture of DME with methane, ethane, and propane decreases PAH and soot formation. Numerical calculations adopting a detailed kinetics showed that DME can be decomposed to produce a relatively large number of methyl radicals in the low-temperature region where PAH forms and grows; thus the mixture of DME with ethylene increases CH{sub 3} radicals significantly in the PAH formation region. Considering that the increase in the concentration of O radicals is minimal in the PAH formation region with DME mixture, the enhancement of PAH and soot formation in the mixture flames of DME and ethylene can be explained based on the role of methyl radicals in PAH and soot formation. Methyl radicals can increase the concentration of propargyls, which could enhance incipient benzene ring formation through the propargyl recombination reaction and subsequent PAH growth. Thus, the result substantiates the importance of methyl radicals in PAH and soot formation, especially in the PAH formation region of diffusion flames. (author)

Yoon, S.S. [Corporate Research and Development Division, Hyundai-Kia Motors, Gyeonggi-do 445-706 (Korea); Anh, D.H. [Korea Electric Power Research Institute, Daejeon 305-380 (Korea); Chung, S.H. [School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742 (Korea)

2008-08-15T23:59:59.000Z

196

analiticheskij kompleks na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

197

aktinidnykh matrits na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

198

aprendizagem organizacional na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

199

aplicacao na prevencao: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

200

acumulam na doenca: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

Note: This page contains sample records for the topic "butyl ether na" 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

acometido na vertigem: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

202

apendicite aguda na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

203

aplicacao na producao: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

204

argila na morfologia: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

205

atividade pesqueira na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

206

adjuvante na papilomatose: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

207

alcalino neoproterozoico na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

208

artificiais na bacia: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

209

acidente na usina: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

210

ambulatoriais na cidade: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

211

adquirida na comunidade: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

212

aplicacao na calibracao: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

213

adsorbirovannogo na tverdykh: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

214

animais silvestres na: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

215

acidentes na industria: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

216

aliado na busca: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

217

alteracoes na secrecao: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

218

auxilio na atividade: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

219

aplicacao na dosimetria: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

220

aplicado na automacao: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

Note: This page contains sample records for the topic "butyl ether na" 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

aktivnosti na fiziologicheskie: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

222

avaliadas na semeadura: Topics by E-print Network  

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Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

223

Um novo paradigma na medicina DESENVOLVEU UMA METODOLOGIA DISRUPTIVA BASEADA NA INTEGRAO DE AVANADAS TECNOLOGIAS  

E-Print Network [OSTI]

Um novo paradigma na medicina do coração DESENVOLVEU UMA METODOLOGIA DISRUPTIVA BASEADA NA M?DICOS A MELHORAR DIAGN?STICOS NA MEDICINA DO CORA??O. #12;Depois do aperfeiçoamento das tecnologias pa medicina. A utilização dos resultados da genéti- ca como meio auxiliar de diagnóstico clínico é já uma

Instituto de Sistemas e Robotica

224

Na double-edge magneto-optic filter for Na lidar profiling of wind and temperature in the  

E-Print Network [OSTI]

proposed by one of the authors (Williams), originating from the Na magneto-optic filter in solar-edge magneto-optic fil- ter (Na-DEMOF). It has advantages over the FPIs and iodine filters because of its magnetic field across the Na cell causes the Zeeman splitting of Na energy levels, which shifts

Chu, Xinzhao

225

[sup 7]Li-NMR determination of stability constants as a function of temperature for lithium-crown ether complexes in a molten salt mixtures  

SciTech Connect (OSTI)

The stability constants of several crown ethers with lithium ion were determined by [sup 7]Li-NMR measurements. A room temperature, basic molten salt of the composition of 55/45 mol % 1-methyl-3-ethyl-imidazolium chloride to aluminum (III) chloride was used as solvent. On the basis of a 1:1 complex formation the following order was found for the stability constants of the investigated crown ethers: 18-crown-6 < 12-crown-4 < benzo-15-crown-5 < 15-crown-5. A temperature dependence study for 12-crown-4, benzo-15-crown-5, and 15-crown-5 was undertaken for the range 5-84[degree]C. Values of [Delta]H and [Delta]S were calculated. At 5.5[degree]C the splitting of the single, fast exchange peak into two separate signals was observed for benzo-15-crown-5, providing further evidence for the formation of the 1:1 complex. 34 refs., 4 figs., 5 tabs.

Gerhard, A. (Univ. of Utah, Salt Lake City, UT (United States) Univ. of Witten/Herdecke (Germany)); Cobranchi, D.P.; Garland, B.A.; Highley, A.M.; Huang, Y.H.; Konya, G.; Eyring, E.M. (Univ. of Utah, Salt Lake City, UT (United States)); Zahl, A.; Eldik, R. van (Univ. of Witten/Herdecke (Germany)); Petrucci, S. (Polytechnic Univ., Farmingdale, NY (United States))

1994-08-11T23:59:59.000Z

226

master's degree NaNotechNology  

E-Print Network [OSTI]

master's degree NaNotechNology When choosing a Master's programme, it is wise to look one step topical, incorporating the latest developments in applied physics, nanotechnology, chemical engineering projects will be carried out at the MESA+ institute for nanotechnology, or the MIRA institute

Twente, Universiteit

227

Ethers help gasoline quality  

SciTech Connect (OSTI)

In this article three scenarios to evaluate the effect of etherification on gasoline production and quality are reviewed: Base case FCC/C{sub 4} alkylation complex - FCC unit operation for maximum gasoline yield, MTBE unit added to base case FCC unit operation and MTBE unit added to maximum olefins FCC unit operation. Details of the FCC, MTBE and C{sub 4} alkylation operations used in this article are reviewed, followed by a discussion of overall results.

Chang, E.J.; Leiby, S.M. (SRI International, Menlo Park, CA (US))

1992-02-01T23:59:59.000Z

228

Laser trapping of {sup 21}Na atoms  

SciTech Connect (OSTI)

This thesis describes an experiment in which about four thousand radioactive {sup 21}Na (t{sub l/2} = 22 sec) atoms were trapped in a magneto-optical trap with laser beams. Trapped {sup 21}Na atoms can be used as a beta source in a precision measurement of the beta-asymmetry parameter of the decay of {sup 21}Na {yields} {sup 21}Ne + {Beta}{sup +} + v{sub e}, which is a promising way to search for an anomalous right-handed current coupling in charged weak interactions. Although the number o trapped atoms that we have achieved is still about two orders of magnitude lower than what is needed to conduct a measurement of the beta-asymmetry parameter at 1% of precision level, the result of this experiment proved the feasibility of trapping short-lived radioactive atoms. In this experiment, {sup 21}Na atoms were produced by bombarding {sup 24}Mg with protons of 25 MeV at the 88 in. Cyclotron of Lawrence Berkeley Laboratory. A few recently developed techniques of laser manipulation of neutral atoms were applied in this experiment. The {sup 21}Na atoms emerging from a heated oven were first transversely cooled. As a result, the on-axis atomic beam intensity was increased by a factor of 16. The atoms in the beam were then slowed down from thermal speed by applying Zeeman-tuned slowing technique, and subsequently loaded into a magneto-optical trap at the end of the slowing path. The last two chapters of this thesis present two studies on the magneto-optical trap of sodium atoms. In particular, the mechanisms of magneto-optical traps at various laser frequencies and the collisional loss mechanisms of these traps were examined.

Lu, Zheng-Tian

1994-09-01T23:59:59.000Z

229

APPENDXD.CHP:Corel VENTURA  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (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...

230

A Low-Carbon Fuel Standard for California Part 1: Technical Analysis  

E-Print Network [OSTI]

methyl-tertiary butyl ether (MTBE), from gasoline by 2004.MTBE was used to meet a requirement for gasoline to containbeginning in 2002, replacing MTBE with ethanol. According to

2007-01-01T23:59:59.000Z

231

Emissions of volatile organic compounds inferred from airborne flux measurements over a megacity  

E-Print Network [OSTI]

methyl-tertiary-butyl- ether (MTBE) and the biomass burningfrom all source categories. MTBE is a gasoline additive andwith the fuel tracer MTBE (e.g. 0.82 for MTBE/benzene).

Karl, T.; Apel, E.; Hodzic, A.; Riemer, D. D; Blake, D. R; Wiedinmyer, C.

2009-01-01T23:59:59.000Z

232

Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area  

E-Print Network [OSTI]

Methanol Ethanol Acetone MEK MTBE CO Methane UCI UCI TOGA/methyl tertiary butyl ether (MTBE), and toluene all ratioedthe observed decay. For MTBE, also a species that is not

2010-01-01T23:59:59.000Z

233

Soil type, crop and irrigation technique affect nitrogen leaching to groundwater  

E-Print Network [OSTI]

water contamination with MTBE (methyl tertiary-butyl ether,that areas vulnerable to MTBE are also vulner- able tothat affect the movement of MTBE. If only a small amount of

Letey, John; Vaughan, Peter

2013-01-01T23:59:59.000Z

234

Measurements of volatile organic compounds at a suburban ground site (T1) in Mexico City during the MILAGRO 2006 campaign: measurement comparison, emission ratios, and source attribution  

E-Print Network [OSTI]

methyl tert-butyl ether (MTBE) at 57 amu has been previouslyby a fragment of MTBE (62%) with minor contributions fromFortner and Knighton, 2008). MTBE also in- terfered (16%)

2011-01-01T23:59:59.000Z

235

Characterization of trace gases measured over Alberta oil sands mining operations: 76 speciated C2-C10volatile organic compounds (VOCs), CO2, CH4, CO, NO, NO2, NOy, O3and SO2  

E-Print Network [OSTI]

methyl tertiary- butyl ether (MTBE) and its effect on plasmaand three VOCs (propyne, furan, MTBE) remained below their 3Ethanol Acetone MEK MAC MVK MTBE Furan CH 3 OH C 2 H 5 OH C

2010-01-01T23:59:59.000Z

236

Synthesis of higher alcohols on copper catalysts supported on alkali-promoted basic oxides  

E-Print Network [OSTI]

-butyl-ether (MTBE) after isobutanol dehydration to form isobutene. An equimolar ratio of methanol to isobutanol would be preferred for MTBE synthesis. Methanol and higher alcohols can also be used for direct blending

Iglesia, Enrique

237

A Low-Carbon Fuel Standard for California, Part 1: Technical Analysis  

E-Print Network [OSTI]

methyl-tertiary butyl ether (MTBE), from gasoline by 2004.MTBE was used to meet a requirement for gasoline to containbeginning in 2002, replacing MTBE with ethanol. According to

Farrell, Alexander E.; Sperling, Dan

2007-01-01T23:59:59.000Z

238

Factors influencing biological treatment of MTBE contaminated ground water  

E-Print Network [OSTI]

Methyl tertiary-butyl ether (MTBE) biodegradation in batchCometabolic degradation of MTBE by a cyclohexane-oxidizingof 49 Biological Treatment of MTBE Fortin, N. Y. , and M. A.

Stringfellow, William T.; Hines Jr., Robert D.; Cockrum, Dirk K.; Kilkenny, Scott T.

2001-01-01T23:59:59.000Z

239

Finding the missing stratospheric Bry: a global modeling study of CHBr3 and CH2Br2  

E-Print Network [OSTI]

Methanol Ethanol Acetone MEK MTBE CO Methane UCI UCI TOGA/methyl tertiary butyl ether (MTBE), and toluene all ratioedthe observed decay. For MTBE, also a species that is not

2010-01-01T23:59:59.000Z

240

APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Aug. 2004, p. 47204726 Vol. 70, No. 8 0099-2240/04/$08.00 0 DOI: 10.1128/AEM.70.8.47204726.2004  

E-Print Network [OSTI]

contamination of surface and groundwater resources by the gasoline oxygenate methyl tert-butyl ether (MTBE) is leading to its phaseout. Ethanol, a likely candidate to substitute MTBE, is increasingly being used

Alvarez, Pedro J.

Note: This page contains sample records for the topic "butyl ether na" 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

Assessing the Effectiveness of California's Underground Storage Tank Annual Inspection Rate Requirements  

E-Print Network [OSTI]

Methyl Tert-Butyl Ether (MTBE), a gasoline additive. Thefor the lions share of MTBE contamination, as well asIn response to the MTBE crisis, California increased the

Cutter, W. Bowman

2008-01-01T23:59:59.000Z

242

Trichloroethene Removal From Waste Gases in Anaerobic Biotrickling Filters Through Reductive Dechlorination  

E-Print Network [OSTI]

methyl tert-butyl ether (MTBE) vapors into water was used.MTBE is highly soluble in water (dimensionless Henrysgas stream was laden with MTBE vapors (200-300 mg m -3 )

Popat, Sudeep Chandrakant

2010-01-01T23:59:59.000Z

243

Life-Cycle Water Impacts of U.S. Transportation Fuels  

E-Print Network [OSTI]

Drinking Water: Methyl Tertiary Butyl Ether (MTBE).http://www.epa.gov/mtbe/water.htm (11/30/10), Chiu, Y. W. ;LCFS LCI LP LPG MED MRO MSF MTBE MWD MWDOC NAICS NERC NETL

Scown, Corinne Donahue

2010-01-01T23:59:59.000Z

244

2011 Annual Planning Summary for Defense Nuclear Nonproliferation (NA-20)  

Broader source: Energy.gov [DOE]

The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 within Defense Nuclear Nonproliferation (NA-20).

245

Gua para a Sustentabilidade Ambiental na UDC  

E-Print Network [OSTI]

#12;#12;#12;Guía para a Sustentabilidade Ambiental na UDC #12;Redacción Dolores Árias Vázquez Juan Introdución 23 Indicadores de sustentabilidade 27 O contorno natural e humanizado 35 Caracterización dos Ambientalización curricular 101 Outros servizos da udC relacionados coa sustentabilidade 105 O medio ambiente

Fraguela, Basilio B.

246

Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol  

E-Print Network [OSTI]

Comparative studies of etching mechanisms of CR-39 in NaOH/H2O and NaOH/ethanol K.C.C. Tse, D Avenue, Kowloon Tong, Hong Kong Available online 13 May 2007 Abstract The bulk etch rate for CR-39 in NaOH/ethanol accumulates on the surface of CR-39 detector during etching in NaOH/ethanol, which is absent during etching

Yu, K.N.

247

Crnica: "A horta na cidade" (Primavera Ambiental 2013)  

E-Print Network [OSTI]

Crónica: "A horta na cidade" (Primavera Ambiental 2013) O pasado mércores 10 de abril tivo lugar na con ADEGA. A actividade que leva por título "A horta na cidade" consistiu nunha conferencia a cargo de, Isabel Barrio explicounos os pros e contras dos diferentes tipos de hortas urbanas, dende as máis básicas

Fraguela, Basilio B.

248

Exposure to di(n-butyl)phthalate and benzo(a)pyrene alters IL-1{beta} secretion and subset expression of testicular macrophages, resulting in decreased testosterone production in rats  

SciTech Connect (OSTI)

Di(n-butyl)phthalate (DBP) and benzo(a)pyrene (BaP) are environmental endocrine disruptors that are potentially hazardous to humans. These chemicals affect testicular macrophage immuno-endocrine function and testosterone production. However, the underlying mechanisms for these effects are not fully understood. It is well known that interleukin-1 beta (IL-1{beta}), which is secreted by testicular macrophages, plays a trigger role in regulating Leydig cell steroidogenesis. The purpose of this study was to reveal the effects of co-exposure to DBP and BaP on testicular macrophage subset expression, IL-1{beta} secretion and testosterone production. Adult male Sprague-Dawley rats were randomly divided into seven groups; two groups received DBP plus BaP (DBP + BaP: 50 + 1 or 250 + 5 mg/kg/day) four groups received DBP or BaP alone (DBP: 50 or 250 mg/kg/day; BaP: 1 or 5 mg/kg/day), and one group received vehicle alone (control). After co-exposure for 90 days, the relative expression of macrophage subsets and their functions changed. ED2{sup +} testicular macrophages (reactive with a differentiation-related antigen present on the resident macrophages) were activated and IL-1{beta} secretion was enhanced. DBP and BaP acted additively, as demonstrated by greater IL-1{beta} secretion relative to each compound alone. These observations suggest that exposure to DBP plus BaP exerted greater suppression on testosterone production compared with each compound alone. The altered balance in the subsets of testicular macrophages and the enhanced ability of resident testicular macrophages to secrete IL-1{beta}, resulted in enhanced production of IL-1{beta} as a potent steroidogenesis repressor. This may represent an important mechanism by which DBP and BaP repress steroidogenesis.

Zheng Shanjun [Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038 (China); Key Laboratory of High Altitude Medicine, Ministry of Education, Chongqing 400038 (China); Key Laboratory of High Altitude Physiology and High Altitude Disease, PLA, Chongqing 400038 (China); Tian Huaijun, E-mail: huaijunt@sohu.co [Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038 (China); Key Laboratory of High Altitude Medicine, Ministry of Education, Chongqing 400038 (China); Key Laboratory of High Altitude Physiology and High Altitude Disease, PLA, Chongqing 400038 (China); Cao Jia [Department of Hygienic Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing 400038 (China); Gao Yuqi, E-mail: yanhua007_007@hotmail.co [Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038 (China); Key Laboratory of High Altitude Medicine, Ministry of Education, Chongqing 400038 (China); Key Laboratory of High Altitude Physiology and High Altitude Disease, PLA, Chongqing 400038 (China)

2010-10-01T23:59:59.000Z

249

Published Ahead of Print 1 July 2011. 2011, 193(17):4549. DOI: 10.1128/JB.00415-11.J. Bacteriol.  

E-Print Network [OSTI]

Laboratory, Joint Genome Institute, Biosciences Division Genome Science B6, Los Alamos, New Mexico 875454 ; U and energy source (9, 10, 11, 14). This strain can also grow on other ethers (e.g., 2-methyl-1,3- dioxolane and butyl methyl ether), alcohols, and benzene as the sole carbon and energy source, and it can grow

Alvarez-Cohen, Lisa

250

7198 J. Org. Chem. 1995,60, 7198-7208 Gas Phase Decomposition of Conjugate Acid Ions of Simple  

E-Print Network [OSTI]

(MTBE),ethyl (ETBE),n-propyl,isopropyl,and isobutyl tert-butyl ethers have been examined experimentally spectroscopy (MIKES) experiments on deuterated ions from MTBE and ETBE. Mechanistic possibilities are probed tert-amyl ether and its deuterated analogues. Protonated MTBE displays a single unimolecular

Morton, Thomas Hellman

251

International Journal of Mass Spectrometry 249250 (2006) 303310 Pyrolysis of 2-methoxy-2,3,3-trimethylbutane (MTMB) monitored by  

E-Print Network [OSTI]

used fuel oxygenates MTBE and TAME), the predominance of bond homolysis at temperatures >900 K suggests homologues ­ methyl tert-butyl ether (MTBE) and tert-amyl methyl ether (TAME) ­ present a new set of problems discussed as alternatives to MTBE and TAME, because they are expected to be much less soluble in water. More

Morton, Thomas Hellman

252

Office of Nuclear Material Integration (ONMI), NA-73  

National Nuclear Security Administration (NNSA)

U.S. as well as Imports and Exports Jointly funded by the NRC & NNSA - Managed by NA-73 Fuel Cycle Facilities Conversion Enrichment Fuel Fabrication Power Reactors,...

253

alvo molecular na: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

relacionar as percepes de identidade profissional dos docentes de educao infantil com (more) Leito, Zuleica Maria Tavares de Brito 2013-01-01 122 for the NA48...

254

Workforce Statistics - NA-30 | National Nuclear Security Administratio...  

National Nuclear Security Administration (NNSA)

NA-30 | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

255

Angular distributions of photoelectrons from free Na clusters  

SciTech Connect (OSTI)

We explore, from a theoretical perspective, photoelectron angular distributions (PADs) of the Na clusters Na{sub 8}, Na{sub 10}, Na{sub 12}, Na{sub 18}, Na{sub 3}{sup +}, Na{sub 11}{sup +}, Na{sub 13}{sup +}, and Na{sub 19}{sup +}. The basis of the description is the time-dependent local-density approximation (TDLDA), augmented by a self-interaction correction (SIC) to describe ionization properties correctly. The scheme is solved on a numerical grid in coordinate space with absorbing bounds. We assume for each cluster system an isotropic ensemble of free clusters and develop for the case of one-photon emission analytical formulas for computing the orientation-averaged PAD on the basis of a few TDLDA-SIC calculations for properly chosen reference orientations. It turns out that all the information in the averaged PAD is contained in one anisotropy parameter. We find that this parameter varies very little with system size, but as a whole is crucially influenced by the detailed ionic structure. We also make comparisons with direct orientation averaging and consider one example reaching outside the perturbative regime.

Wopperer, P.; Dinh, P. M. [Universite de Toulouse, UPS, Laboratoire de Physique Theorique, IRSAMC, F-31062 Toulouse Cedex, France and CNRS, UMR 5152, F-31062 Toulouse Cedex (France); Faber, B.; Reinhard, P.-G. [Institut fuer Theoretische Physik, Universitaet Erlangen, D-91058 Erlangen (Germany); Suraud, E. [Universite de Toulouse, UPS, Laboratoire de Physique Theorique, IRSAMC, F-31062 Toulouse Cedex, France and CNRS, UMR 5152, F-31062 Toulouse Cedex (France); Institut fuer Theoretische Physik, Universitaet Erlangen, D-91058 Erlangen (Germany)

2010-12-15T23:59:59.000Z

256

armazenamento na energia: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Rey Juan Carlos, Universidad 3 Portugal lidera consrcio envolvido na produo de "energia limpa, segura e abundante" Engineering Websites Summary: ) - A produo de...

257

ambientais envolvidos na: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Elisa Flvia Luiz Cardoso 2014-01-01 4 Portugal lidera consrcio envolvido na produo de "energia limpa, segura e abundante" Engineering Websites Summary: ) - A produo de...

258

alta energia na: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Leonardo Oliveira Ferreira 2006-01-01 2 Portugal lidera consrcio envolvido na produo de "energia limpa, segura e abundante" Engineering Websites Summary: ) - A produo de...

259

Pion and kaon freezeout in NA44  

SciTech Connect (OSTI)

The NA44 spectrometer is optimized for the study of single and two-particle particle spectra near mid-rapidity for transverse momenta below {approx} 1 GeV/c. A large fraction of all pairs in the spectrometer`s acceptance are at low relative momenta, resulting in small statistical uncertainties on the extracted size parameters. In addition, the spectrometer`s clean particle identification allows the authors to measure correlation functions for pions, kaons, and protons. This contribution will concentrate on the source size parameters determined from pion and kaon correlation functions. These size parameters will be compared to calculations from the RQMD event generator and also interpreted in the context of a hydrodynamic model. Finally, the measured single particle spectra will be examined from the viewpoint of hydrodynamics.

NA44 Collaboration

1994-12-01T23:59:59.000Z

260

Crnica I Encontro Solar na UDC O pasado mrcores 24 de abril tivo lugar na Praza da Fraga (Campus da  

E-Print Network [OSTI]

/informativos/os-universitarios-da-coruna-comparten-unha-xornada-de- gastronomia-solar-573783 http://www.lavozdegalicia.es/noticia/coruna/2013/04/24/cocina-universitaria-energiaCrónica I Encontro Solar na UDC O pasado mércores 24 de abril tivo lugar na Praza da Fraga (Campus da Zapateira) a primeira edición do Encontro Solar na UDC. Esta era a terceira das actividades

Fraguela, Basilio B.

Note: This page contains sample records for the topic "butyl ether na" 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

Supporting Information Electric Field Reversal of Na2SO4, (NH4)2SO4, and Na2CO3 relative to CaCl2  

E-Print Network [OSTI]

water 1 M Na2 CO3 1 M Na2 SO4 1 M (NH4 )2 SO4 2 M CaCl2 2 M NaCl Re (2) (a.u.) Incident Infrared (cm -1.8 M CaCl2, 1.8 M NaCl, 1.1 M Na2CO3, 1.1 M Na2SO4, and 1.1 M (NH4)2SO4 salt solutions. ExperimentalS1 Supporting Information Electric Field Reversal of Na2SO4, (NH4)2SO4, and Na2CO3 relative to CaCl

262

Combined 3D-QSAR, molecular docking and molecular dynamics study on thyroid hormone activity of hydroxylated polybrominated diphenyl ethers to thyroid receptors ?  

SciTech Connect (OSTI)

Several recent reports suggested that hydroxylated polybrominated diphenyl ethers (HO-PBDEs) may disturb thyroid hormone homeostasis. To illuminate the structural features for thyroid hormone activity of HO-PBDEs and the binding mode between HO-PBDEs and thyroid hormone receptor (TR), the hormone activity of a series of HO-PBDEs to thyroid receptors ? was studied based on the combination of 3D-QSAR, molecular docking, and molecular dynamics (MD) methods. The ligand- and receptor-based 3D-QSAR models were obtained using Comparative Molecular Similarity Index Analysis (CoMSIA) method. The optimum CoMSIA model with region focusing yielded satisfactory statistical results: leave-one-out cross-validation correlation coefficient (q{sup 2}) was 0.571 and non-cross-validation correlation coefficient (r{sup 2}) was 0.951. Furthermore, the results of internal validation such as bootstrapping, leave-many-out cross-validation, and progressive scrambling as well as external validation indicated the rationality and good predictive ability of the best model. In addition, molecular docking elucidated the conformations of compounds and key amino acid residues at the docking pocket, MD simulation further determined the binding process and validated the rationality of docking results. -- Highlights: ? The thyroid hormone activities of HO-PBDEs were studied by 3D-QSAR. ? The binding modes between HO-PBDEs and TR? were explored. ? 3D-QSAR, molecular docking, and molecular dynamics (MD) methods were performed.

Li, Xiaolin [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China)] [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China); Ye, Li [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China)] [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China); Wang, Xiaoxiang [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China)] [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China); Wang, Xinzhou [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China)] [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China); Liu, Hongling [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China)] [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China); Zhu, Yongliang [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China)] [Suzhou NeuPharma Co.,Ltd, Suzhou 215123 (China); Yu, Hongxia, E-mail: hongxiayu01@yahoo.com.cn [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China)] [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046 (China)

2012-12-15T23:59:59.000Z

263

Topical Review Voltage Dependence of the Na/K Pump  

E-Print Network [OSTI]

or ``ion well'' hy- pothesis. There are only two ways that net transport can be voltage dependent. Either of the external Na+ and K+ bind- ing sites within the membrane field. This access channel or ``ion well produced by applying a blocking Key words: Na,K-ATPase -- Membrane potential -- Access channel -- Ion well

Gadsby, David

264

Race to license new MTBE and TAME routes heats up  

SciTech Connect (OSTI)

With refineries and petrochemical manufacturers continuing to gear up production of oxygenates for use in reformulated fuels, new routes to methyl tert-butyl ether (MTBE) and tert-amyl methyl ether (TAME) are clearly hot items in the licensing market. And probably nowhere has the competition become as intense as in offerings for skeletal isomerization technologies to boost ethers production from fluid catalytic cracking and steam cracking.

Rotman, D.

1993-01-06T23:59:59.000Z

265

Emission Control and Elimination Through The Use Of Condensation and Heat Recovery Technologies- A Case Study  

E-Print Network [OSTI]

be no addition of water in the process, the level of water in the condensate would falloff dramatically. A prototype unit capable of handling three ovens with a total air flow of 1200 ft 3 /min (cfm) was installed. The unit performed as expected... ether (butyl cellosolve) and propylene glycol monomethyl ether. Butyl cellosolve is a regulated glycol ether (which is a HAP). At the oven process temperatures, the vapor pressure of the solvent mixture is 250 rom Hg. This corresponds to a saturated...

Madewell, A. E.; Bullock, W. N.

266

Analytical Potential Energy Surface for the Na + HF NaF + H reaction: Application of Conventional Transition-State Theory  

E-Print Network [OSTI]

Analytical Potential Energy Surface for the Na + HF NaF + H reaction: Application of Conventional Transition-State Theory Alessandra F. A. Vilela, Ricardo Gargano a Patricia R.P. Barreto b a Instituto de from calculation of the rate constant using con- ventional Transition State Theory (TST

267

Otoczenie spoleczne i jego wplyw na wyniki ekonomiczne przedsibiorstwa na przykladzie instytucji nonprofit wiadczcej uslugi lecznicze i rehabilitacyjne.  

E-Print Network [OSTI]

_wyniki_ekonomiczne_przedsi_biorstwa_na_przyk_adzie_instytucji_nonpr ofit_wiadcz_cej_us_ugi_lecznicze_i_rehabilitacyjne_autorstwa_K_Szagdaja_A_Miks a/888478 Recenzja 2: N_wyniki_ekonomiczne_przedsi_biorstwa_na_przyk_adzie_instytucji_nonpr ofit_wiadcz_cej_us_ugi_lecznicze_i_rehabilitacyjne_autorstwa_K_Szagdaja_Recenzj a_2_N_Wenc_a/888477 hal

Paris-Sud XI, Université de

268

Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold  

E-Print Network [OSTI]

The dark matter interpretation of the DAMA modulation signal depends on the NaI(Tl) scintillation efficiency of nuclear recoils. Previous measurements for Na recoils have large discrepancies, especially in the DAMA/LIBRA modulation energy region. We report a quenching effect measurement of Na recoils in NaI(Tl) from 3keV$_{\\text{nr}}$ to 52keV$_{\\text{nr}}$, covering the whole DAMA/LIBRA energy region for light WIMP interpretations. By using a low-energy, pulsed neutron beam, a double time-of-flight technique, and pulse-shape discrimination methods, we obtained the most accurate measurement of this kind for NaI(Tl) to date. The results differ significantly from the DAMA reported values at low energies, but fall between the other previous measurements. We present the implications of the new quenching results for the dark matter interpretation of the DAMA modulation signal.

Xu, Jingke; Calaprice, Frank; Westerdale, Shawn; Froborg, Francis; Suerfu, Burkhant; Alexander, Thomas; Aprahamian, Ani; Back, Henning O; Casarella, Clark; Fang, Xiao; Gupta, Yogesh K; Ianni, Aldo; Lamere, Edward; Lippincott, W Hugh; Liu, Qian; Lyons, Stephanie; Siegl, Kevin; Smith, Mallory; Tan, Wanpeng; Kolk, Bryant Vande

2015-01-01T23:59:59.000Z

269

On the 21Na(p,gamma)22Mg thermonuclear rate for 22Na production in novae  

E-Print Network [OSTI]

Classical novae are potential sources of gamma-rays, like the 1.275 MeV gamma emission following 22Na beta decay, that could be detected by appropriate instruments on board of future satellites like INTEGRAL. It has been shown that the production of 22Na by novae is affected by the uncertainty on the 21Na(p,gamma)22Mg rate and in particular by the unknown partial widths of the Ex = 5.714 MeV, J^pi = 2^+, 22Mg level. To reduce these uncertainties, we performed shell model calculations with the OXBASH code, compared the results with available spectroscopic data and calculated the missing partial widths. Finally, we discuss the influence of these results on the 21Na(p,gamma)22Mg reaction rate and 22Na synthesis.

Nadya A. Smirnova; Alain Coc

2000-08-16T23:59:59.000Z

270

Oxygenates du`jour...MTBE? Ethanol? ETBE?  

SciTech Connect (OSTI)

There are many different liquids that contain oxygen which could be blended into gasoline. The ones that have been tried and make the most sense are in the alcohol (R-OH) and ether (R-O-R) chemical family. The alcohols considered are: methanol (MeOH), ethanol (EtOH), tertiary butyl alcohol (TBA). The ethers are: methyl tertiary butyl ether (MTBE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), tertiary amyl ethyl ether (TAEE), di-isopropyl ether (DIPE). Of the eight oxygenates listed above, the author describes the five that are still waiting for widespread marketing acceptance (methanol, TBA, TAME, TAEE, and DIPE). He then discusses the two most widely used oxygenates in the US, MTBE and ethanol, along with the up-and-coming ethanol ether, ETBE. Selected physical properties for all of these oxygenates can be found in Table 2 at the end of this paper. A figure shows a simplified alcohol/ether production flow chart for the oxygenates listed above and how they are interrelated.

Wolfe, R.

1995-12-31T23:59:59.000Z

271

LANXESS Global Butyl Rubber Research Facility  

E-Print Network [OSTI]

Park, in partnership with Surface Science Western $10million City of London Investment in Fraunhofer- fraunhofer Agreement chosen to highlight celebrations for 40th Anniversary of Canada-Germany cooperation fuel cluster in Sarnia-Lambton, said Sarnia Mayor Mike Bradley, noting the Bioindustrial Innovation

Denham, Graham

272

E-Print Network 3.0 - azotada na produtividade Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

das melhores prticas da... destacar o crescimento significativo da certificao ISO 9001 ABNT, 1994 na indstria de software e... reside na gerao de estimativas...

273

E-Print Network 3.0 - adulteradas comercializadas na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

das melhores prticas da... destacar o crescimento significativo da certificao ISO 9001 ABNT, 1994 na indstria de software e... reside na gerao de estimativas...

274

E-Print Network 3.0 - atmosferas modificadas na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fax: +41 22 730 80258013 Summary: efeito estufa e aerossis da atmosfera, na radiao solar e nas propriedades da superfcie terrestre... na alterao do equilbrio da...

275

auto-anticorpos na artrite: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

276

anti-sepsia intrabucal na: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

277

autonomia na auto-reconquista: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Na monocarboxylate transport (SMCT) protein expression correlates with survival in colon cancer, 2006) We report an extensive characterization of the Na monocarboxy- late...

278

E-Print Network 3.0 - anseniformes ocorrido na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

de maior intensidade e freqncia esto na periferia das placas tectnicas. O Brasil se situa numa... posio privilegiada, ou seja, na poro central da Placa...

279

E-Print Network 3.0 - auxilio na descoberta Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Na ltima dcada, o Projeto Peixes de Bonito junto com vrias... universidades do Brasil e do exterior revelaram numerosos achados. Os mais recentes aconteceram na Expedio...

280

E-Print Network 3.0 - agricultura familiar na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atualmente, segundo o censo que realizamos em 200910 na comunidade... trabalho na horta que eles chamam de agricultura. Aqui procurei preservar a classificao deles,...

Note: This page contains sample records for the topic "butyl ether na" 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

Surface-polishing process for NaI crystals  

SciTech Connect (OSTI)

Darkening of large arrays of NaI used in high energy physics experiments at SLAC has prompted an investigation of methods for annealing radiation damage. As part of this research, it has been necessary to repolish the flat faces of the NaI crystals. The final polishing parameters are given in this document as well as an indication of some techniques which did not work.

Francis, J.

1982-09-01T23:59:59.000Z

282

Polybrominated diphenyl ethers in e-waste: Level and transfer in a typical e-waste recycling site in Shanghai, Eastern China  

SciTech Connect (OSTI)

Highlights: PBDEs were detected in the majority of e-waste. PBDEs were found in TVs made in China after 1990. The levels of ?PBDEs in e-waste made in Japan far exceed the threshold limit of RoHS. The inappropriate recycling and disposal of e-waste is an important source of PBDEs. - Abstract: Very few data for polybrominated diphenyl ethers (PBDEs) were available in the electronic waste (e-waste) as one of the most PBDEs emission source. This study reported concentrations of PBDEs in e-waste including printer, rice cooker, computer monitor, TV, electric iron and water dispenser, as well as dust from e-waste, e-waste dismantling workshop and surface soil from inside and outside of an e-waste recycling plant in Shanghai, Eastern China. The results showed that PBDEs were detected in the majority of e-waste, and the concentrations of ?PBDEs ranged from not detected to 175 g/kg, with a mean value of 10.8 g/kg. PBDEs were found in TVs made in China after 1990. The mean concentrations of ?PBDEs in e-waste made in Korea, Japan, Singapore and China were 1.84 g/kg, 20.5 g/kg, 0.91 g/kg, 4.48 g/kg, respectively. The levels of ?PBDEs in e-waste made in Japan far exceed the threshold limit of RoHS (1.00 g/kg). BDE-209 dominated in e-waste, accounting for over 93%. The compositional patterns of PBDEs congeners resembled the profile of Saytex 102E, indicating the source of deca-BDE. Among the samples of dust and surface soil from a typical e-waste recycling site, the highest concentrations of ?{sub 18}PBDEs and BDE-209 were found in dust in e-waste, ranging from 1960 to 340,710 ng/g and from 910 to 320,400 ng/g, which were 12 orders of magnitude higher than other samples. It suggested that PBDEs released from e-waste via dust, and then transferred to surrounding environment.

Li, Yue; Duan, Yan-Ping, E-mail: duanyanping@tongji.edu.cn; Huang, Fan; Yang, Jing; Xiang, Nan; Meng, Xiang-Zhou; Chen, Ling

2014-06-01T23:59:59.000Z

283

Effects of Point Defects and Impurities on Kinetics in NaAlH4  

Broader source: Energy.gov (indexed) [DOE]

Alanate * Viable hydrogen storage material (5.6 wt%) NaAlH 4 13 Na 3 AlH 6 + 23 Al + H 2 Na 3 AlH 6 3 NaH + Al + 32 H 2 * But: reactions slow - Only happen at too...

284

Investigation of thermonuclear $^{18}$Ne($?$,$p$)$^{21}$Na rate via resonant elastic scattering of $^{21}$Na+$p$  

E-Print Network [OSTI]

The $^{18}$Ne($\\alpha$,$p$)$^{21}$Na reaction is thought to be one of the key breakout reactions from the hot CNO cycles to the rp-process in type I x-ray bursts. In this work, the resonant properties of the compound nucleus $^{22}$Mg have been investigated by measuring the resonant elastic scattering of $^{21}$Na+$p$. An 89 MeV $^{21}$Na radioactive beam delivered from the CNS Radioactive Ion Beam Separator bombarded an 8.8 mg/cm$^2$ thick polyethylene (CH$_{2}$)$_{n}$ target. The $^{21}$Na beam intensity was about 2$\\times$10$^{5}$ pps, with a purity of about 70% on target. The recoiled protons were measured at the center-of-mass scattering angles of $\\theta_{c.m.}$$\\approx$175.2${^\\circ}$, 152.2${^\\circ}$, and 150.5${^\\circ}$ by three sets of $\\Delta E$-$E$ telescopes, respectively. The excitation function was obtained with the thick-target method over energies $E_x$($^{22}$Mg)=5.5--9.2 MeV. In total, 23 states above the proton-threshold in $^{22}$Mg were observed, and their resonant parameters were determined via an $R$-matrix analysis of the excitation functions. We have made several new $J^{\\pi}$ assignments and confirmed some tentative assignments made in previous work. The thermonuclear $^{18}$Ne($\\alpha$,$p$)$^{21}$Na rate has been recalculated based on our recommended spin-parity assignments. The astrophysical impact of our new rate has been investigated through one-zone postprocessing x-ray burst calculations. We find that the $^{18}$Ne($\\alpha$,$p$)$^{21}$Na rate significantly affects the peak nuclear energy generation rate, reaction fluxes, as well as the onset temperature of this breakout reaction in these astrophysical phenomena.

L. Y. Zhang; J. J. He; A. Parikh; S. W. Xu; H. Yamaguchi; D. Kahl; S. Kubono; P. Mohr; J. Hu; P. Ma; S. Z. Chen; Y. Wakabayashi; H. W. Wang; W. D. Tian; R. F. Chen; B. Guo; T. Hashimoto; Y. Togano; S. Hayakawa; T. Teranishi; N. Iwasa; T. Yamada; T. Komatsubara; Y. H. Zhang; X. H. Zhou

2014-03-19T23:59:59.000Z

285

13-03-09 9:37 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 2 | Ether Wave Propaganda Page 1 of 4http://etherwave.wordpress.com/2012/10/21/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-2/  

E-Print Network [OSTI]

13-03-09 9:37 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 2 | Ether Wave Propaganda Page 1 of 4http://etherwave.wordpress.com/2012/10/21/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-2/ Modernity, the Cold War, and New Whig Histories of Ideas, Pt. 2 October 21, 2012 Posted

Solovey, Mark

286

12-11-24 7:47 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 3 Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/11/17/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-3/  

E-Print Network [OSTI]

12-11-24 7:47 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 3 Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/11/17/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-3/ Modernity, the Cold War, and New Whig Histories of Ideas, Pt. 3 November 17, 2012 Posted

Solovey, Mark

287

13-03-09 9:32 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 1 | Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/09/22/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-1/  

E-Print Network [OSTI]

13-03-09 9:32 PMModernity, the Cold War, and New Whig Histories of Ideas, Pt. 1 | Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/09/22/modernity-the-cold-war-and-new-whig-histories-of-ideas-pt-1/ Modernity, the Cold War, and New Whig Histories of Ideas, Pt. 1 September 22, 2012 Posted

Solovey, Mark

288

Rate coefficient for the chemi-ionization in slow Li*(n)+Li and Na*(n)+Na collisions  

SciTech Connect (OSTI)

The chemi-ionization processes in slow-atom-Rydberg-atom collisions are considered in this paper. A version of the semiclassical method of rate coefficient calculation that is free of the presumptions which significantly limited its applicability previously is presented. The method is applied to the cases of Li*(n)+Li and Na*(n)+Na collisions for the principal quantum numbers 5{<=}n{<=}25 and temperatures 600{<=}T{<=}1200 K. The results of calculation of the rate coefficients of the corresponding chemi-ionization processes are compared to the existing experimental data from the literature.

Ignjatovic, Lj.M.; Mihajlov, A.A. [Institute of Physics, P. O. Box 68, 11080 Zemun, Belgrade (Serbia and Montenegro)

2005-08-15T23:59:59.000Z

289

NNSA PERSONNEL SECURITY CLEARANCE ACTION REQUEST Program Code: NA  

E-Print Network [OSTI]

NNSA PERSONNEL SECURITY CLEARANCE ACTION REQUEST Program Code: NA OFFICIAL USE ONLY (UPON sections and fields are required to be completed. The National Nuclear Security Administration (NNSA material (SNM). AL F 470.1 Form is used by NNSA Personnel Security Department to initiate background

Fuerschbach, Phillip

290

AMERINDIA n35, 2011 La nominalisation en kali'na  

E-Print Network [OSTI]

'na est une langue relativement bien connue grâce aux travaux de Hoff sur le Carib du Surinam (variété du origine commune. Par ailleurs, Hoff (2009) décrit, pour le Carib du Surinam, les constructions

Paris-Sud XI, Université de

291

BIOLOGICAL SAFETY O N/A Biosafety Cabinets  

E-Print Network [OSTI]

: _________________________________________________ _________________________________________________ _________________________________________________ RADIATION SAFETY O N/A ___RS-1 Radioactive Material Inventory / Use Logs out of date ___RS-2 Radioactive Material waste inventory cards improperly filled out ___RS-3 Stock radioactive material not secure ___RS-4 __Accelerator __PressureVessels __HiReactMaterials __Rad Material __PwIndV / __PwTools __>55g Oil __X

Entekhabi, Dara

292

A Lepton Universality Test at CERN NA62 Experiment  

E-Print Network [OSTI]

The NA62 experiment at CERN collected a large sample of K+ --> enu decays during a dedicated run in 2007, aiming at a precise test of lepton universality by measurement of the helicity suppressed ratio RK = BR(K+ --> enu)/BR(K+ --> munu). A preliminary result of the analysis of a partial data sample of 51089 K+ --> enu candidates is presented.

Evgueni Goudzovski

2010-05-07T23:59:59.000Z

293

Ja argang 14 naJa ar / 2007  

E-Print Network [OSTI]

Ja argang 14 naJa ar / 2007 ixMATR In gesprek met marIa van der Hoeven posItIef oordeel over IndustrIal desIgn alumnIdag over duurzame energIe Magnetisme op atomaire schaal k w a r t a a l b l a d v

Franssen, Michael

294

National Aeronautics and Space Administration NaNotechNology Roadmap  

E-Print Network [OSTI]

National Aeronautics and Space Administration · NaNotechNology Roadmap Technology Area 10 Michael A: Nanotechnology. NASA developed this DRAFT Space Technology Roadmap for use by the National Research Council (NRC Nanotechnology involves the manipulation of matter at the atomic level, where convention- al physics breaks down

Waliser, Duane E.

295

INTEX-NA: Intercontinental Chemical Transport Experiment -North America  

E-Print Network [OSTI]

and its precursors (hydrocarbons, NOx and HOx), aerosols, and the major greenhouse gases (CO2, CH4, N2O transported between the U. S., Canada, and Mexico. INTEX-NA will be the first continental scale inflow and horizontal concentration gradients of CO2 throughout the troposphere over continental source/sink regions

296

Background p(450 GeV/c)-p,d (NA51)  

E-Print Network [OSTI]

#12;#12;Background ' Open charm J / Drell-Yan #12;* p(450 GeV/c)-p,d (NA51) 208 16 p(200 Ge) 32 p(450 GeV/c)-A (A=C,Al,Cu,W) (NA38) 10101 10101010 652 3 4 B targetprojectile B(J/)/(AB)(nb) 5 4 3 Pb(208x158 GeV/c)-Pb (NA50) S(32x200 GeV/c)-U (NA38) p(200 GeV/c)-W (NA38) p(450 GeV/c)-A (A=p,d) (NA

Paris-Sud XI, Universit de

297

Investigation of thermonuclear $^{18}$Ne($\\alpha$,$p$)$^{21}$Na rate via resonant elastic scattering of $^{21}$Na+$p$  

E-Print Network [OSTI]

The $^{18}$Ne($\\alpha$,$p$)$^{21}$Na reaction is thought to be one of the key breakout reactions from the hot CNO cycles to the rp-process in type I x-ray bursts. In this work, the resonant properties of the compound nucleus $^{22}$Mg have been investigated by measuring the resonant elastic scattering of $^{21}$Na+$p$. An 89 MeV $^{21}$Na radioactive beam delivered from the CNS Radioactive Ion Beam Separator bombarded an 8.8 mg/cm$^2$ thick polyethylene (CH$_{2}$)$_{n}$ target. The $^{21}$Na beam intensity was about 2$\\times$10$^{5}$ pps, with a purity of about 70% on target. The recoiled protons were measured at the center-of-mass scattering angles of $\\theta_{c.m.}$$\\approx$175.2${^\\circ}$, 152.2${^\\circ}$, and 150.5${^\\circ}$ by three sets of $\\Delta E$-$E$ telescopes, respectively. The excitation function was obtained with the thick-target method over energies $E_x$($^{22}$Mg)=5.5--9.2 MeV. In total, 23 states above the proton-threshold in $^{22}$Mg were observed, and their resonant parameters were determ...

Zhang, L Y; Parikh, A; Xu, S W; Yamaguchi, H; Kahl, D; Kubono, S; Mohr, P; Hu, J; Ma, P; Chen, S Z; Wakabayashi, Y; Wang, H W; Tian, W D; Chen, R F; Guo, B; Hashimoto, T; Togano, Y; Hayakawa, S; Teranishi, T; Iwasa, N; Yamada, T; Komatsubara, T; Zhang, Y H; Zhou, X H

2014-01-01T23:59:59.000Z

298

In Situ 13C and 23Na Magic Angle Spinning NMR Investigation of...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In Situ 13C and 23Na Magic Angle Spinning NMR Investigation of Supercritical CO2 Incorporation in Smectite-Natural Organic In Situ 13C and 23Na Magic Angle Spinning NMR...

299

Postdoctoral positions fall/winter 2014 Na,K-ATPase turnover and ATP dependence.  

E-Print Network [OSTI]

Postdoctoral positions fall/winter 2014 Na,K-ATPase turnover and ATP and consumption of ATP in relation to Na,K- ATPase activity in neurons and renal epithelial cell systems. Develop

Haviland, David

300

Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for Water...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for WaterEthanol Separation. Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for WaterEthanol Separation. Abstract:...

Note: This page contains sample records for the topic "butyl ether na" 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

The Beam and Detector for the NA48 Neutral Kaon CP Violation Experiment at CERN  

E-Print Network [OSTI]

The Beam and Detector, used for the NA48 experiment, devoted to the measurement of $Re(\\epsilon^{\\prime}/\\epsilon)$, and for the NA48/1 experiment on rare K_S and neutral hyperon decays, are described.

Fanti, V; Marras, D; Musa, L; Nappi, A; Batley, J Richard; Bevan, A; Dosanjh, R S; Galik, R; Gershon, T; Hay, B; Kalmus, George Ernest; Katvars, S; Lazzeroni, C; Moore, R; Munday, D J; Needham, M D; Olaiya, E; Parker, M A; Patel, M; Slater, M; Takach, S; White, T O; Wotton; Bal, F; Barr, G; Bocquet, G; Bremer, J; Brodier-Yourstone, P; Buchholz, P; Burns, M; Ceccucci, A; Clment, M; Cuhadar-Donzelsmann, T; Cundy, Donald C; Doble, Niels; Falaleev, V; Formenti, F; Funk, W; Gatignon, L; Gonidec, A; Grafstrm, P; Hallgren, B; Kapusta, P; Kesseler, G; Kubischta, Werner; Iwanski, W; Lacourt, A; Laverriere, G; Linser, G; Ljuslin, C; Marchioro, A; Mast, M; Matheys, J P; Morel, M; Norton, A; Orlic, J P; Panzer-Steindel, B; Schinzel, D; Seidl, W; Taureg, H; Tarl, J C; Velasco, M; Vossnack, O; Wahl, H; Wertelaers, P; Weterings, J; Cheshkov, C; Gaponenko, A; Goudzovski, E; Khristov, P Z; Kalinin, A; Kekelidze, V D; Kozhevnikov, Yu; Madigozhin, D T; Molokanova, N A; Potrebenikov, Yu K; Tkatchev, A; Zinchenko, A I; Boyle, O; Knowles, I; Martin, V; Parsons, H; Peach, K J; Sacco, R; Veitch, E; Walker, A; Carassiti, V; Contalbrigo, M; Cotta-Ramusino, A; Dalpiaz, P; Damiani, C; Duclos, J; Ferretti, P; Frabetti, P L; Gianoli, A; Martini, M; Petrucci, F; Porcu, M; Rossi, F; Savri, M; Scarpa, M; Simani, C; Bizzeti, A; Calvetti, M; Collazuol, G; Graziani, G; Iacopini, E; Lenti, M; Martelli, F; Michetti, A; Ruggiero, G; Veltri, M; Becker, H G; Behler, M; Blmer, H; Coward, D; Ebersberger, C; Eppard, K; Eppard, M; Fox, H; Geib, K H; Hirstius, A; Kalter, A; Kleinknecht, K; Koch, U; Kpke, L; Lopes da Silva, P; Luitz, S; Marouelli, P; Masetti, L; Melzer-Pellmann, I; Moosbrugger, U; Morales-Morales, C; Peters, A; Renk, B; Scheidt, J; Schmidt, J; Schmidt, S A; Schnharting, V; Schu, Yu; Staeck, J; Wanke, R; Wilhelm, R; Winhart, A; Wittgen, M; Zeitnitz, O; Dabrowski, A; Fonseca-Martin, T; Chollet, J C; Crp, S; de La Taille, C; Fayard, L; Iconomidou-Fayard, L; Martin-Chassard, G; Ocariz, J; Unal, G; Wingerter-Seez, I; Anzivino, Giuseppina; Bordacchini, F; Cenci, P; Imbergamo, E; Lariccia, P; Lubrano, P; Mestvirishvili, A; Papi, A; Pep, M; Piccini, M; Punturo, M; Talamonti, C; Tondini, F; Bertanza, L; Calafiura, P; Carosi, R; Casali, R; Cerri, C; Cirilli, M; Costantini, F; Fantechi, R; Fidecaro, Francesco; Fiorini, L; Giudici, S; Gorini, B; Laico, F; Lamanna, G; Mannelli, I; Marzulli, V; Passuello, D; Pierazzini, G M; Raffaelli, F; Sozzi, M; Tripiccione, R; Anvar, S; Bdrde, D; Bugeon, F; Chze, J B; Cogan, J; De Beer, M; Debu, P; Durand, D; Edard, S; Fallou, J L; Formica, A; Gosset, L; Granier de Cassagnac, R; Heitzmann, J; Le Provost, H; Louis, F; Mandzhavidze, I; Mazzucato, E; Migliori, A; Mur, M; Peyaud, B; Schanne, S; Steinkamp, O; Tarte, Grard; Turlay, Ren; Vallage, B; Holder, M; Augustin, I; Bender, M; Maier, A; Schwarz, I; Ziolkowski, M; Arcidiacono, R; Barberis, P L; Benotto, F; Bertolino, F; Biino, C; Brunasso, O; Cartiglia, N; Clemencic, M; Dattola, D; Goy-Lopez, S; Govi, G; Guida, R; Marchetto, F; Menichetti, E; Palestini, S; Pastrone, N; Chlopik, A; Guzik, Z; Nassalski, J P; Rondio, E; Szleper, M; Wislicki, W; Wronka, S; Dibon, Heinz; Fischer, G; Jeitler, Manfred; Markytan, Manfred; Mikulec, I; Neuhofer, G; Pernicka, M; Taurok, Anton; Widhalm, L

2007-01-01T23:59:59.000Z

302

E-Print Network 3.0 - aborto ilegal na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

... (mre de 33 ans, deux enfants, en union libre) ; ... Il n'a pas t pla... ... s'il a t... et... comment on dit... planifi .... Non, non il n'a pas...

303

Impact of Biodiesel-Based Na on the Selective Catalytic Reduction...  

Broader source: Energy.gov (indexed) [DOE]

Impact of Biodiesel-Based Na on the Selective Catalytic Reduction (SCR) of NOx Using Cu-zeolite Impact of Biodiesel-Based Na on the Selective Catalytic Reduction (SCR) of NOx Using...

304

E-Print Network 3.0 - atmosfera controlada na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for: atmosfera controlada na Page: << < 1 2 3 4 5 > >> 1 coleo explorando o ensino o brasil e o meio ambiente antrtico Summary: Antrtica pgina 15 Aquecimento global na...

305

Caustic Recycle from Hanford Tank Waste Using Large Area NaSICON Structures (LANS)  

SciTech Connect (OSTI)

This report presents the results of a 5-day test of an electrochemical bench-scale apparatus using a proprietary (NAS-GY) material formulation of a (Na) Super Ion Conductor (NaSICON) membrane in a Large Area NaSICON Structures (LANS) configuration. The primary objectives of this work were to assess system performance, membrane seal integrity, and material degradation while removing Na from Group 5 and 6 tank waste from the Hanford Site.

Fountain, Matthew S.; Sevigny, Gary J.; Balagopal, S.; Bhavaraju, S.

2009-03-31T23:59:59.000Z

306

Fiscalizao e Controle: O Poder Legislativo na Argentina e no Brasil Contemporneos  

E-Print Network [OSTI]

1 Fiscalização e Controle: O Poder Legislativo na Argentina e no Brasil Contemporâneos Charles na Argentina e no Brasil Contemporâneos "La société a le droit de demander compte à tout agent public concentrar-se na análise das novas instituições de controle externo no Brasil e na Argentina, de acordo com o

Paris-Sud XI, Université de

307

Text na web Zprva esitele o vsledcch esen projektu  

E-Print Network [OSTI]

bydlí. Jedná se zejména o: 1. Permanentní instalaci kvalitního datového projektoru (typicky 4000 Ansi projektu). 2. Permanentní instalaci mensího datového projektoru (do 2500 Ansi Lumen) v seminárních, M5 à dataprojektor 4000 Ansi Lumen à PC kom

Cerveny, Vlastislav

308

Cosmogenic radionuclide production in NaI(Tl) crystals  

E-Print Network [OSTI]

The production of long-lived radioactive isotopes in materials due to the exposure to cosmic rays on Earth surface can be an hazard for experiments demanding ultra-low background conditions, typically performed deep underground. Production rates of cosmogenic isotopes in all the materials present in the experimental set-up, as well as the corresponding cosmic rays exposure history, must be both well known in order to assess the relevance of this effect in the achievable sensitivity of a given experiment. Although NaI(Tl) scintillators are being used in experiments aiming at the direct detection of dark matter since the first nineties of the last century, very few data about cosmogenic isotopes production rates have been published up to date. In this work we present data from two 12.5 kg NaI(Tl) detectors, developed in the frame of the ANAIS project, which were installed inside a convenient shielding at the Canfranc Underground Laboratory just after finishing surface exposure to cosmic rays. The very fast start of data taking allowed to identify and quantify isotopes with half-lives of the order of tens of days. Initial activities underground have been measured and then production rates at sea level have been estimated following the history of detectors; values of about a few tens of nuclei per kg and day for Te isotopes and 22Na and of a few hundreds for I isotopes have been found. These are the first direct estimates of production rates of cosmogenic nuclides in NaI crystals. A comparison of the so deduced rates with calculations using typical cosmic neutron flux at sea level and a carefully selected description of excitation functions will be also presented together with an estimate of the corresponding contribution to the background at low and high energies, which can be relevant for experiments aiming at rare events searches.

J. Amar; S. Cebrin; C. Cuesta; E. Garca; C. Ginestra; M. Martnez; M. A. Olivn; Y. Ortigoza; A. Ortiz de Solrzano; C. Pobes; J. Puimedn; M. L. Sarsa; J. A. Villar; P. Villar

2015-01-16T23:59:59.000Z

309

mTOR Regulates Lysosomal ATP-Sensitive Two-Pore Na+  

E-Print Network [OSTI]

mTOR Regulates Lysosomal ATP-Sensitive Two-Pore Na+ Channels to Adapt to Metabolic State Chunlei cytosolic ATP levels is not well understood. Here, we identify an endolysosomal ATP-sensitive Na+ channel (lysoNaATP). The channel is a complex formed by two-pore channels (TPC1 and TPC2), ion channels

Clapham, David E.

310

Besedje stare kme?ke delovne ege na Korokem steljeraje  

E-Print Network [OSTI]

dolo?enem podro?ju s pomo?jo rok U? s?ta:rix ?ca:jtix, ?k? ?e ni b?w? ?n? ?c?:st pa ne e?l?:ktrike pa ?tuj k?m?:?ke mexani?za:cije ?ni:so poz?na:li, se je na ?pa:u?rex de?wa:wo u??s? na ?ro:ke. SSKJ + Plet. + delo || ?d?:wo -a s delanje, vezano na... ?lu:ksus. SSKJ Plet. paver || ?pa:w?r -ra m kmet U? s?ta:rix ?ca:jtix, ?k? ?e ni b?w? ?n? ?c?:st pa ne e?l?:ktrike pa ?tuj k?m?:?ke mexani?za:cije ?ni:so poz?na:li, se je na ?pa:u?rex de?wa:wo u??s? na ?ro:ke. [nem. der Bauer kmet] SSKJ + (nije...

Benko, Anja

2010-01-01T23:59:59.000Z

311

Impact of surface roughness on the electrical parameters of industrial high efficiency NaOH-NaOCl textured multicrystalline silicon solar cell  

SciTech Connect (OSTI)

Sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) solution (1:1 ratio by volume) based texturization process at 80-82 C is an easy, low cost and comparatively new and convenient option for fabrication of any multicrystalline silicon (mC-Si) solar cell. In the present study atomic force microscope is used to observe the intragrain surface in a miniscule area (3 {mu}m x 3 {mu}m) of NaOH-NaOCl textured surface by two and three dimensional analysis, roughness analysis and section analysis. The r.m.s value of the surface parameter of 7.0 nm ascertains the smoothness of the textured surface and further the surface reflectivity is minimized to 4-6% in the 500-1000 nm wavelength range by a proper silicon nitride anti-reflection coating. Comparing with the standard HF-HNO{sub 3}-CH{sub 3}COOH acid textured cell, the NaOH-NaOCl textured cell shows a comparatively lower value of series resistance of 7.17 m{omega}, higher value of shunt resistance of 18.4 {omega} to yield a fill factor of 0.766 leading to more than 15% cell efficiency in the industrial cell processing line. This AFM study yields different surface roughness parameters for the NaOH-NaOCl textured wafers which can be used as a reference standard for optimized texturing. (author)

Basu, P.K. [Department of Physics, Echelon Institute of Technology, Faridabad 121002, Haryana (India); Pujahari, R.M. [Department of Physics, Echelon Institute of Technology, Faridabad 121002, Haryana (India); Department of Physics, Manav Rachna International University, Faridabad 121001, Haryana (India); Kaur, Harpreet [Department of Physics, Manav Rachna International University, Faridabad 121001, Haryana (India); Department of Physics, Advanced Institute of Technology and Management, Palwal 121105, Haryana (India); Singh, Devi [Department of Physics, Manav Rachna International University, Faridabad 121001, Haryana (India); Varandani, D.; Mehta, B.R. [Department of Physics, Indian Institute of Technology, New Delhi 110016 (India)

2010-09-15T23:59:59.000Z

312

13-03-09 9:30 PMCold War Social Science and the Rubric of the "Cold War" | Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/09/06/cold-war-social-science-and-the-rubric-of-the-cold-war/  

E-Print Network [OSTI]

13-03-09 9:30 PMCold War Social Science and the Rubric of the "Cold War" | Ether Wave Propaganda Page 1 of 6http://etherwave.wordpress.com/2012/09/06/cold-war-social-science-and-the-rubric-of-the-cold-war/ Cold War Social Science and the Rubric of the "Cold War" September 6, 2012 Posted by Will Thomas in EWP

Solovey, Mark

313

NIOSH Manual of Analytical Methods (third edition). Fourth supplement  

SciTech Connect (OSTI)

The NIOSH Manual of Analytical Methods, 3rd edition, was updated for the following chemicals: allyl-glycidyl-ether, 2-aminopyridine, aspartame, bromine, chlorine, n-butylamine, n-butyl-glycidyl-ether, carbon-dioxide, carbon-monoxide, chlorinated-camphene, chloroacetaldehyde, p-chlorophenol, crotonaldehyde, 1,1-dimethylhydrazine, dinitro-o-cresol, ethyl-acetate, ethyl-formate, ethylenimine, sodium-fluoride, hydrogen-fluoride, cryolite, sodium-hexafluoroaluminate, formic-acid, hexachlorobutadiene, hydrogen-cyanide, hydrogen-sulfide, isopropyl-acetate, isopropyl-ether, isopropyl-glycidyl-ether, lead, lead-oxide, maleic-anhydride, methyl-acetate, methyl-acrylate, methyl-tert-butyl ether, methyl-cellosolve-acetate, methylcyclohexanol, 4,4'-methylenedianiline, monomethylaniline, monomethylhydrazine, nitric-oxide, p-nitroaniline, phenyl-ether, phenyl-ether-biphenyl mixture, phenyl-glycidyl-ether, phenylhydrazine, phosphine, ronnel, sulfuryl-fluoride, talc, tributyl-phosphate, 1,1,2-trichloro-1,2,2-trifluoroethane, trimellitic-anhydride, triorthocresyl-phosphate, triphenyl-phosphate, and vinyl-acetate.

Not Available

1990-08-15T23:59:59.000Z

314

E-Print Network 3.0 - argilas pilarizadas na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

.1 m frac- tion was separated using centrifugation and Ca-, Na- and K-saturated with 1N CaCl2, Na... ) SiO2 Al2O3 Fe2O3 MnO MgO CaO Na2O 0.50 60.65 13.69 1.67 0.04 3.65 2.07 < L.D....

315

Determination of the composition of H2 O-NaCl-CaCl2  

E-Print Network [OSTI]

Determination of the composition of H2 O-NaCl-CaCl2 fluid inclusions based on microthermometric fluids in which NaCl and CaCl2 are the two most abundant salts and which may be adequately described by the system H2 O-NaCl-CaCl2 are common in many geologic environments. The best source of information

Bodnar, Robert J.

316

Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol  

E-Print Network [OSTI]

Bulk and track etch properties of CR-39 SSNTD etched in NaOH/ethanol K.F. Chan, F.M.F. Ng, D. described the use of NaOH/ethanol as an etchant for the CR-39 detector, and have determined the corre and track etch properties of CR- 39 in NaOH/ethanol were derived from direct measurements. The bulk etch

Yu, K.N.

317

E-Print Network 3.0 - adubo na perspectiva Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Computer Technologies and Information Sciences 30 Vitor Barata Ribeiro Blanco Barroso Gerao de Sombras em Tempo Real para Modelos CAD Summary: perspectiva, como na idia...

318

E-Print Network 3.0 - ambiente na periferia Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

o meio ambiente antrtico Summary: Dados Internacionais de Catalogao na Publicao (CIP) O Brasil e o meio ambiente antrtico : ensino... projeto ambiental Mudanas...

319

E-Print Network 3.0 - ao cultural na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DO SUL INSTITUTO DE INFORM ' Summary: -orientador Porto Alegre, outubro de 1994. 12; 2 CIP - CATALOGA C AO NA PUBLICA C AO Bordini, Rafael Heitor... Bandeira da Silva)...

320

E-Print Network 3.0 - amendoim forrageiro na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

autorais (Lei n 9.610). Dados Internacionais de Catalogao na Publicao (CIP) ... Source: Instituto Nacional de Pesquisas Espaciais, Laboratrio Associado de...

Note: This page contains sample records for the topic "butyl ether na" 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

E-Print Network 3.0 - auto-estima na funcionalidade Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

das melhores prticas da... destacar o crescimento significativo da certificao ISO 9001 ABNT, 1994 na indstria de ... Source: Endler, Markus - Departamento de...

322

Supplementary Information Bianchi et al., NN-A11887A The Neurotoxic MEC-4(d) Na+  

E-Print Network [OSTI]

Gene Function Method Effect on mec-4(d)- induced necrosis cax-1 Ca2+ exchanger RNAi No ncx-1 Na+ /Ca2

Schafer, William R.

323

E-Print Network 3.0 - arsenazo iii na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Phototriggerable Diplasmalogen Liposomes Summary: a (Bchl), Arsenazo III (AIII), NaCl, CaCl2, human fibrinogen (93% clottable), tissue transglutaminase... + was no longer detected...

324

E-Print Network 3.0 - aumento na densidade Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

de Qumica, Universidade Estadual de Campinas Collection: Chemistry 19 Por Que Falha a Energia Solar em Portugal? Segunda-feira, 29 de Dezembro de 2003 Summary: encontram na...

325

E-Print Network 3.0 - aplicacao na padronizacao Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

em producao na construcao de dezenas de aplicacoes entregues a ind'ustria. Neste ... Source: Endler, Markus - Departamento de Informtica, Pontifcia Universidade...

326

E-Print Network 3.0 - albopictus skuse na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Explorit Topic List Advanced Search Sample search results for: albopictus skuse na Page: << < 1 2 3 4 5 > >> 1 Biological Invasions 3: 151166, 2001. 2002 Kluwer Academic...

327

E-Print Network 3.0 - aedes albopictus na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by Explorit Topic List Advanced Search Sample search results for: aedes albopictus na Page: << < 1 2 3 4 5 > >> 1 Biological Invasions 3: 151166, 2001. 2002 Kluwer Academic...

328

E-Print Network 3.0 - agem na demanda Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Mathematics 2 Descrio original: Chaetodon tricolor Bloch, 1795, tipo do Brasil. CARACTERSTICAS DIAGNOSTIC CHARACTERS Summary: filamento na extremidade de cada lobo,...

329

E-Print Network 3.0 - abordagem multiescala na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sciences 2 Analise de formas representadas por marcos Summary: oria Natural do Brasil", 23) 2.2 Tipos de Dados em Morfometria Apesar da principal abordagem na...

330

E-Print Network 3.0 - armas brasileiras na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Engineering 2 Metas Brasileiras de Reduo de Emisses de GEE Summary: no Brasil 1. Metas Brasileiras Cenrio com Meta de Reduo do Desmatamento na Amaznia...

331

E-Print Network 3.0 - ambiental na costa Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for Systems and Robotics, Lisboa Collection: Engineering 3 coleo explorando o ensino o brasil e o meio ambiente antrtico Summary: Dados Internacionais de Catalogao na...

332

E-Print Network 3.0 - anomalia geologica na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Wancura Barbieri 1 Summary: a variabilidade da precipitao na regio Sul do Brasil podendo ser responsveis por anomalias positivas e... . Para a definio das...

333

E-Print Network 3.0 - aplicacao na medida Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energia em Clusters Web Dorgival Guedes , Wagner Meira Jr. , Diego Nogueira , Rodrigo Pereira Summary: na Figura 2. Os tres elemen- tos principais sao a aplicacao...

334

E-Print Network 3.0 - aleitamento materno na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Anthology Collection: Computer Technologies and Information Sciences 2 ROBERTA MARIA PEREIRA LEITE CICLO ESTRAL E MENSTRUAL: REPERCUSSO DA Summary: em ambos os grupos. Na...

335

E-Print Network 3.0 - adultos na coorte Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

tem 2400 m de cerca e quer cercar um campo retangular que est na margem ... Source: Pereira, Marcone Corra - Departamento de Matemtica, Universidade de So Paulo...

336

E-Print Network 3.0 - arte na enfermagem Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2001 a 2004, na perspectiva da aderncia dos cursos de graduao em Enfermagem, Medicina e... , Educao Fsica, Enfermagem, Farmcia, ... Source: Hanazaki, Natalia -...

337

High precision measurements of Na-26 beta(-) decay  

E-Print Network [OSTI]

PHYSICAL REVIEW C 71, 044309 (2005) High precision measurements of 26Na ?? decay G. F. Grinyer,1,? C. E. Svensson,1 C. Andreoiu,1 A. N. Andreyev,2 R. A. E. Austin,3,? G. C. Ball,2 R. S. Chakrawarthy,2 P. Finlay,1 P. E. Garrett,1,2 G. Hackman,2 J.... C. Hardy,4 B. Hyland,1 V. E. Iacob,4 K. A. Koopmans,3 W. D. Kulp,5 J. R. Leslie,6 J. A. Macdonald,2 A. C. Morton,2 W. E. Ormand,7 C. J. Osborne,2 C. J. Pearson,2 A. A. Phillips,1 F. Sarazin,2,? M. A. Schumaker,1 H. C. Scraggs,2,? J. Schwarzenberg,8...

Grinyer, GF; Svensson, CE; Andreoiu, C.; Andreyev, AN; Austin, RAE; Ball, GC; Chakrawarthy, RS; Finlay, P.; Garrett, PE; Hackman, G.; Hardy, John C.; Hyland, B.; Iacob, VE; Koopmans, KA; Kulp, WD; Leslie, JR; Macdonald, JA; Morton, AC; Ormand, WE; Osborne, CJ; Pearson, CJ; Phillips, AA; Sarazin, F.; Schumaker, MA; Scraggs, HC; Schwarzenberg, J.; Smith, MB; Valiente-Dobon, JJ; Waddington, JC; Wood, JL; Zganjar, EF.

2005-01-01T23:59:59.000Z

338

New etherification process commercialized in Finland  

SciTech Connect (OSTI)

The phase-out of leaded fuels in Europe, Asia, and parts of Africa and Latin America is increasing demand for octane and octane-bearing fuel components such as ethers. Early solutions to the problem of increasing octane while reducing tailpipe emissions involved use of methyl tertiary butyl ether (MTBE). According to Neste, using both tertiary amyl methyl ether (TAME) and MTBE can give refiners increased blending flexibility for volatility control. But the economics associated with TAME production often make TAME units difficult to justify. The paper discusses the NExTAME process, the unit at the Porvoo refinery and process improvements.

NONE

1997-01-06T23:59:59.000Z

339

n-Selective Single Capture Following Xe{sup 18+} And Xe{sup 54+} Impact On Na(3s) And Na*(3p)  

SciTech Connect (OSTI)

State selective single charge exchange n-level cross sections are calculated for collisions of Xe18+ and Xe54+ ions with Na(3s) and Na*(3p) over the energy range of 0.1 to 10.0 keV/amu. The CTMC method is used which includes all two-body interactions. Experimental state-selective cross sections and their corresponding transverse momentum spectra for Xe18+ are found to be in reasonable accord with the calculations.

Otranto, S. [CONICET and Dto. de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina); Olson, R. E. [Physics Department, Missouri University of Science and Technology, Rolla, MO 65401 (United States); Hasan, V. G.; Hoekstra, R. [KVI-Atomic and Molecular Physics, University of Groeningen (Netherlands)

2011-06-01T23:59:59.000Z

340

MSSBAUER STUDIES OF NaFeS2 : MAGNETIC HYPERFINE FIELDS AND COVALENCY IN MFeS2 COMPOUNDS (M=Na, K, Rb, Cs) (*)  

E-Print Network [OSTI]

'étude Mössbauer de NaFeS2, de la température ambiante à celle de l'hélium liquide, révèle la présence d. Abstract. 2014 Mössbauer studies of NaFeS2 from room temperature down to liquid helium tem- perature. The temperature stability was ± 2 °C. The samples were prepared by fusing iron powder with sodium carbonate

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "butyl ether na" 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

Molecular dynamics investigation of Na{sup +} in Na{sub 2}Ni{sub 2}TeO{sub 6}  

SciTech Connect (OSTI)

An inter-atomic potential for Na{sub 2}Ni{sub 2}TeO{sub 6} in the Parrinello- Rahman-Vashishta (PRV) model is parameterized empirically. The potential reproduces variety of structural and transport properties of that material in good agreement with recent experimental results. The study provides fresh insights on the migration channels and mechanism of Na{sup +} in the system.

Sau, Kartik, E-mail: padmakumarp@iitg.ernet.in; Kumar, P. Padma, E-mail: padmakumarp@iitg.ernet.in [Department of Physics, Indian Institute of Technology Guwahati, Guwahati-781039 (India)

2014-04-24T23:59:59.000Z

342

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

343

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

344

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

345

untitled  

Gasoline and Diesel Fuel Update (EIA)

3,054 Fuel Ethanol (FE) 1,019 97 1,116 2,133 528 393 3,054 Methyl Tertiary Butyl Ether (MTBE) 561 0 561 0 0 0 0 All Other Oxygenates a 0 0 0 0 0 0 0 Motor Gasoline Blend. Comp....

346

PROOF COPY [023113] 008209QEE [023113]008209QEE  

E-Print Network [OSTI]

as a replacement for the gasoline oxygenate, methyl tert-butyl ether MTBE , may lead to indirect impacts related facilitate the migration of pre-existing contamination. MTBE 25 mg/L influent was not degraded inlet by one order of magnitude relative to columns fed BTEX alone or with MTBE. However, 16S

Alvarez, Pedro J.

347

Environmental Toxicology and Chemistry, Vol. 21, No. 12, pp. 26312639, 2002 Printed in the USA  

E-Print Network [OSTI]

--Aquifer microcosms were used to determine how ethanol and methyl-tert-butyl ether (MtBE) affect monoaromatic compared to benzene, which was degraded only under aerobic conditions. The MtBE was not degraded within 100 to phase out MtBE as a gasoline oxy- genate is likely to significantly increase the use of ethanol

Alvarez, Pedro J.

348

PSA Vol 1 Tables Revised Ver 2 Print.xls  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

11,352 13 1,309 15,181 42 Fuel Ethanol (FE) 0 0 0 0 0 0 0 Methyl Tertiary Butyl Ether (MTBE) 234 928 10,251 0 21 11,434 31 Other Oxygenates 955 390 1,101 13 1,288 3,747 10 Motor...

349

90% of new cars have engines specially designed to run on hydrous ethanol. This avoids the expense of remov-  

E-Print Network [OSTI]

competes with gasoline (petrol), diesel and MTBE (methyl tert-butyl ether, added to gasoline to MTBE, however, ethanol is comparable regarding price per energy unit and has considerable environmental advantages. MTBE is added to gasoline as an octane booster, replac- ing the lead formerly used

350

Physico-chemical and biological characterization of an aquifer polluted with Yves Benoit (1)  

E-Print Network [OSTI]

to in order to meet specific requirements. Oxygenates such as methyl tert-butyl ether (MTBE) or ethyl tert on groundwater was not estimated prior to their utilization and the actual level of MTBE and ETBE contamination of MTBE- and ETBE-biodegradation is quite poor. Two directives have been adopted in the EU to promote

Paris-Sud XI, Université de

351

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

E-Print Network [OSTI]

water contamination by methyl tert-butyl ether (MTBE) have made policymakers more cognizant of the need reformulated gasoline (RFG) (2% oxygen) year-round to reduce emissions that contribute to ozone formation. MTBE-making process that lead to the widespread use of MTBE over the last decade is now quite controversial (BRP, 1999

Alvarez, Pedro J.

352

Author's personal copy Automobile proximity and indoor residential concentrations of BTEX and MTBE  

E-Print Network [OSTI]

Author's personal copy Automobile proximity and indoor residential concentrations of BTEX and MTBE to indoor benzene and MTBE concentrations appeared to have been dominated by car exhaust concentrations of other BTEX components and methyl tert-butyl ether (MTBE) have been reported [5,6]. Up until

Siegel, Jeffrey

353

I. Pt-Catalyzed Tandem Epoxide Fragmentation/Pentannulation of Propargylic Esters II. Progress Toward the Kopsia Family of Indole Alkaloids  

E-Print Network [OSTI]

methyl t-butyl ether (MTBE), a much more environmentallyPhMe, reflux POCl 3 , Et 3 N CN MTBE Scheme 3.3: OptimizedO H NH POCl 3 , Et 3 N CN MTBE 1-Isocyanocyclohex-1-ene (

Pujanauski, Brian Gerard

2010-01-01T23:59:59.000Z

354

Biotreatment of groundwater contaminated with MTBE: interaction of common environmental co-contaminants  

E-Print Network [OSTI]

Biotreatment of groundwater contaminated with MTBE: interaction of common environmental co November 2005 Key words: aerobic, biodegradation, BTEX, co-contaminant, MTBE, TBA Abstract Contamination of groundwater with the gasoline additive methyl tert-butyl ether (MTBE) is often accompanied by many aromatic

355

Canada could get three MTBE plants  

SciTech Connect (OSTI)

This article reports on the proposed development of three methyl tert-butyl ether (MTBE) plants in Canada. MTBE is used as an oxygenated fuel additive. The author discusses how demand for MTBE is increasing due to the regulation of leaded gasoline by the U.S. and Canadian governments. The exportation of MTBE from Canada to the U.S. is highlighted.

Anderson, E

1990-03-01T23:59:59.000Z

356

Atmosphere-Water Interaction of Chloroform, Toluene, and MTBE in Small Perennial Urban Streams  

E-Print Network [OSTI]

Atmosphere-Water Interaction of Chloroform, Toluene, and MTBE in Small Perennial Urban Streams-butyl ether (MTBE) are frequently detected VOCs in the atmosphere, surface water, and ground water in urban not be the predominant source of chloroform and toluene in the two urban streams. In contrast, MTBE may be coming from

357

By Martman Cohen News Office staff  

E-Print Network [OSTI]

tertiary butyl ether, or MTBE (another hazardous gasoline component that is hazardous to health the benzene-removal technol- ogy to sites contaminated with MTBE. That gasoline additive tends to mi- grate of MTBE- contaminated sites from around the U.S. By simulating an anaerobic pro- cess similar to what

Lovley, Derek

358

UMass builds bugs to eat MTBE ByAuriaCimino  

E-Print Network [OSTI]

UMass builds bugs to eat MTBE ByAuriaCimino STAfFWRITER An area university's process to destroy with methyl tertiary butyl ether (MTBE), which is found in gasoline. Once the first field trial is complete in particular has suffered from MTBE contamination because of the abundance of groundwater in the state, said

Lovley, Derek

359

Fourier Transform Infrared Spectroscopy  

E-Print Network [OSTI]

FTIR - 1 Fourier Transform Infrared Spectroscopy FTIR DETERMINATION OF MTBE IN GASOLINE AND ETHANOL FTIR DETERMINATION OF MTBE IN GASOLINE AND ETHANOL IN VODKA AND MOUTHWASH INTRODUCTION As a part has contained MTBE (methyl tert­butyl ether) as its primary oxygenate. However, there has been

Nizkorodov, Sergey

360

MTBE still facing pressure from ethanol under latest fuel proposal  

SciTech Connect (OSTI)

The US EPA's finalized reformulated gasoline rule, part of Phase II of the 1990 Clean Air Act, signals a possible turnaround for the sluggish methyl tert-butyl ether (MTBE) market. But if a 30% renewable fuels proposal favoring ethanol passes, pressure could continue for MTBE.

Lucas, A.

1994-01-26T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

untitled  

Gasoline and Diesel Fuel Update (EIA)

Fuel Ethanol (FE) 1,229 108 1,337 2,369 724 497 3,590 Methyl Tertiary Butyl Ether (MTBE) 292 0 292 0 0 0 0 All Other Oxygenates a 0 0 0 0 0 0 0 Motor Gasoline Blend. Comp....

362

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

363

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

364

Modeling of Hydrogen Storage Materials: A Reactive Force Field for NaH  

E-Print Network [OSTI]

Modeling of Hydrogen Storage Materials: A Reactive Force Field for NaH Ojwang' J.G.O.*, Rutger van is the fall in potential energy surface during heating. Keywords: hydrogen storage, reactive force field governing hydrogen desorption in NaH. During the abstraction process of surface molecular hydrogen charge

Goddard III, William A.

365

E-Print Network 3.0 - anemia na ancylostomose Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(NETN without EDTA, supplemented with calcium: 20 mM Tris pH 8, 150 mM NaCl, 10 mM CaCl2, 0.1% NP... M NaCl, 10 mM imidazole, 10% glycerol, 1 mM AEBSF, 0.1% b-mercaptoethanol)...

366

The Catalytic Chemistry of HCN+NO over Na- and Ba-Y, FAU: An...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Catalytic Chemistry of HCN+NO over Na- and Ba-Y, FAU: An In Situ FTIR and TPDTPR Study. The Catalytic Chemistry of HCN+NO over Na- and Ba-Y, FAU: An In Situ FTIR and TPDTPR...

367

Departamento de Electronica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru~na  

E-Print Network [OSTI]

Departamento de Electr´onica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru;Departamento de Electr´onica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru~na AC LUCEH;Departamento de Electr´onica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru~na AC LUCEH

Fraguela, Basilio B.

368

High Temperature, Low Relative Humidity, Polymer-type Membranes Based on Disulfonated Poly(arylene ether) Block and Random Copolymers Optionally Incorporating Protonic Conducting Layered Water insoluble Zirconium Fillers  

SciTech Connect (OSTI)

Our research group has been engaged in the past few years in the synthesis of biphenol based partially disulfonated poly(arylene ether sulfone) random copolymers as potential PEMs. This series of polymers are named as BPSH-xx, where BP stands for biphenol, S stands for sulfonated, H stands for acidified and xx represents the degree of disulfonation. All of these sulfonated copolymers phase separate to form nano scale hydrophilic and hydrophobic morphological domains. The hydrophilic phase containing the sulfonic acid moieties causes the copolymer to absorb water. Water confined in hydrophilic pores in concert with the sulfonic acid groups serve the critical function of proton (ion) conduction and water transport in these systems. Both Nafion and BPSH show high proton conductivity at fully hydrated conditions. However proton transport is especially limited at low hydration level for the BPSH random copolymer. It has been observed that the diffusion coefficients of both water and protons change with the water content of the pore. This change in proton and water transport mechanisms with hydration level has been attributed to the solvation of the acid groups and the amount of bound and bulk-like water within a pore. At low hydration levels most of the water is tightly associated with sulfonic groups and has a low diffusion coefficient. This tends to encourage isolated domain morphology. Thus, although there may be significant concentrations of protons, the transport is limited by the discontinuous morphological structure. Hence the challenge lies in how to modify the chemistry of the polymers to obtain significant protonic conductivity at low hydration levels. This may be possible if one can alter the chemical structure to synthesize nanophase separated ion containing block copolymers. Unlike the BPSH copolymers, where the sulfonic acid groups are randomly distributed along the chain, the multiblock copolymers will feature an ordered sequence of hydrophilic and hydrophobic segments. If, like in Nafion, connectivity is established between the hydrophilic domains in these multiblock copolymers, they will not need as much water, and hence will show much better protonic conductivity than the random copolymers (with similar degree of sulfonation, or IEC) at partially hydrated conditions. The goal of this research is to develop a material suitable for use as a polymer electrolyte membrane which by the year 2010 will meet all the performance requirements associated with fuel cell operation at high temperatures and low relative humidity, and will out-perform the present standard Nafion{reg_sign}. In particular, it is our objective to extend our previous research based on the use of thermally, oxidatively, and hydrolytically, ductile, high Tg ion containing polymers based on poly(arylene ethers) to the production of polymer electrolyte membranes which will meet all the performance requirements in addition to having an areal resistance of < 0.05 ohm-cm{sup 2} at a temperature of up to 120 C, relative humidity of 25 to 50%, and up to 2.5 atm total pressure. In many instances, our materials already out performs Nafion{reg_sign}, and it is expected that with some modification by either combining with conductive inorganic fillers and/or synthesizing as a block copolymer it will meet the performance criteria at high temperatures and low relative humidity. A key component in improving the performance of the membranes (and in particular proton conductivity) and meeting the cost requirements of $40/m{sup 2} is our development of a film casting process, which shows promise for generation of void free thin films of uniform thickness with controlled polymer alignment and configuration.

McGrath, James E.; Baird, Donald G.

2010-06-03T23:59:59.000Z

369

Spectroscopy of $^{28}$Na: shell evolution toward the drip line  

E-Print Network [OSTI]

Excited states in $^{28}$Na have been studied using the $\\beta$-decay of implanted $^{28}$Ne ions at GANIL/LISE as well as the in-beam $\\gamma$-ray spectroscopy at the NSCL/S800 facility. New states of positive (J$^{\\pi}$=3,4$^+$) and negative (J$^{\\pi}$=1-5$^-$) parity are proposed. The former arise from the coupling between 0d$\\_{5/2}$ protons and a 0d$\\_{3/2}$ neutron, while the latter are due to couplings with 1p$\\_{3/2}$ or 0f$\\_{7/2}$ neutrons. While the relative energies between the J$^{\\pi}$=1-4$^+$ states are well reproduced with the USDA interaction in the N=17 isotones, a progressive shift in the ground state binding energy (by about 500 keV) is observed between $^{26}$F and $^{30}$Al. This points to a possible change in the proton-neutron 0d$\\_{5/2}$-0d$\\_{3/2}$ effective interaction when moving from stability to the drip line. The presence of J$^{\\pi}$=1-4$^-$ negative parity states around 1.5 MeV as well as of a candidate for a J$^{\\pi}$=5$^-$ state around 2.5 MeV give further support to the col...

Lepailleur, A; Mutschler, A; Sorlin, O; Bader, V; Bancroft, C; Barofsky, D; Bastin, B; Baugher, T; Bazin, D; Bildstein, V; Borcea, C; Borcea, R; Brown, B A; Caceres, L; Gade, A; Gaudefroy, L; Grvy, S; Grinyer, G F; Iwasaki, H; Khan, E; Krll, T; Langer, C; Lemasson, A; Llidoo, O; Lloyd, J; Negoita, F; Santos, F de Oliveira; Perdikakis, G; Recchia, F; Redpath, T; Roger, T; Rotaru, F; Saenz, S; Saint-Laurent, M -G; Smalley, D; Sohler, D; Stanoiu, M; Stroberg, S R; Thomas, J C; Vandebrouck, M; Weisshaar, D; Westerberg, A

2015-01-01T23:59:59.000Z

370

Synthesis and crystal structure of new layered BaNaSc(BO{sub 3}){sub 2} and BaNaY(BO{sub 3}){sub 2} orthoborates  

SciTech Connect (OSTI)

Crystals of two new layered BaNaSc(BO{sub 3}){sub 2} (I) and BaNaY(BO{sub 3}){sub 2} (II) orthoborates are grown from the melt-solution by the spontaneous crystallization onto the platinum loop. Single crystal X-ray analysis showed that the compounds are isostructural with the space group R3-bar, a=5.23944(12) and 5.3338(2) A, and c=34.5919(11) and 35.8303(19) A for I and II, respectively, Z=6. The distinctive feature of the structure is the close-packed composite anion-cation (Ba,Na)(BO{sub 3}) layers. The layers are combined into the base building packages of two types: {l_brace}M{sup 3+}[Ba{sup 2+}(BO{sub 3}){sup 3-}]{sub 2}{r_brace}{sup +} and {l_brace}M{sup 3+}[Na{sup +}(BO{sub 3}){sup 3-}]{sub 2}{r_brace}{sup -}, where M is Sc or Y. Neutral-charge two-package (four-layer) blocks are stacked by the rhombohedral principle into twelve layers of the cubic packing. - Graphical abstract: The distinctive feature of new orthoborate crystals BaNaSc(BO{sub 3}){sub 2} and BaNaY(BO{sub 3}){sub 2} is the combination of base building packages of two types: {l_brace}M{sup 3+}[Ba{sup 2+}(BO{sub 3}){sup 3-}]{sub 2}{r_brace}{sup +} and {l_brace}M{sup 3+}[Na{sup +}(BO{sub 3}){sup 3-}]{sub 2}{r_brace}{sup -}, where M is Sc or Y.

Seryotkin, Yurii V., E-mail: yuvs@uiggm.nsc.r [Institute of Geology and Mineralogy RAS, 3, Koptyuga avenue, 630090 Novosibirsk (Russian Federation); Novosibirsk State University, 2, Pirogova street, 630090 Novosibirsk (Russian Federation); Bakakin, Vladimir V. [Institute of Inorganic Chemistry RAS, 3, Lavrentieva avenue, 630090 Novosibirsk (Russian Federation); Kokh, Aleksandr E.; Kononova, Nadezhda G. [Institute of Geology and Mineralogy RAS, 3, Koptyuga avenue, 630090 Novosibirsk (Russian Federation); Svetlyakova, Tatyana N. [Institute of Geology and Mineralogy RAS, 3, Koptyuga avenue, 630090 Novosibirsk (Russian Federation); Novosibirsk State University, 2, Pirogova street, 630090 Novosibirsk (Russian Federation); Kokh, Konstantin A. [Institute of Geology and Mineralogy RAS, 3, Koptyuga avenue, 630090 Novosibirsk (Russian Federation); Drebushchak, Tatyana N. [Novosibirsk State University, 2, Pirogova street, 630090 Novosibirsk (Russian Federation); Institute of Solid State Chemistry and Mechanochemistry RAS, 18, Kutateladze street, 630128 Novosibirsk (Russian Federation)

2010-05-15T23:59:59.000Z

371

Der Briefwechsel zwischen Sidonie Na?dherny? und Albert Bloch : September 1947-September 1950 : mit einer Einfu?hrung in die Widmungsgedichte von Karl Kraus an Sidonie Na?dherny?  

E-Print Network [OSTI]

Die Aufgabe dieser Arbeit besteht darin, Sidonie Na?dherny? Einflu auf das Werk von Karl Kraus, vor allem auf seine Lyrik, an Hand der Albert Bloch/Sidonie Na?dherny?-Korrespondenz auszuwerten. Neben den eigentlichen ...

Champion, Elke Lorenz

1998-01-01T23:59:59.000Z

372

Assessment of the release of atomic Na from a burning black liquor droplet using quantitative PLIF  

SciTech Connect (OSTI)

The quantitative measurement of atomic sodium (Na) release, at high concentration, from a burning black liquor droplet has been demonstrated using a planar laser-induced fluorescence (PLIF) technique, corrected for fluorescence trapping. The local temperature of the particle was measured to be approximately 1700 C, at a height of 10 mm above a flat flame burner. The PLIF technique was used to assess the temporal release of atomic Na from the combustion of black liquor and compare it with the Na concentration in the remaining smelt. A first-order model was made to provide insight using a simple Plug Flow Reactor model based on the independently measured concentration of residual Na in the smelt as a function of time. This model also required the dilution ratio of the combustion products in the flat flame entrained into the plume gas from the black liquor particle to be estimated. The key findings of these studies are: (i) the peak concentration of atomic Na from the combustion of the black liquor droplets is around 1.4 ppm; (ii) very little atomic Na is present during the drying, devolatilisation or char combustion stages; and (iii) the presence of atomic Na during smelt phase dominates over that from the other combustion stages. (author)

Saw, Woei L.; Nathan, Graham J. [Centre for Energy Technology, The Environment Institute, School of Mechanical Engineering, The University of Adelaide, SA 5005 (Australia); Ashman, Peter J.; Alwahabi, Zeyad T. [Centre for Energy Technology, The Environment Institute, School of Chemical Engineering, The University of Adelaide, SA 5005 (Australia)

2009-07-15T23:59:59.000Z

373

Investigation of the Effects of Biodiesel-based Na on Emissions Control Components  

SciTech Connect (OSTI)

A single-cylinder diesel engine was used to investigate the impact of biodiesel-based Na on emissions control components using specially blended 20% biodiesel fuel (B20). The emissions control components investigated were a diesel oxidation catalyst (DOC), a Cu-zeolite-based NH{sub 3}-SCR (selective catalytic reduction) catalyst, and a diesel particulate filter (DPF). Both light-duty vehicle, DOC-SCR-DPF, and heavy-duty vehicle, DOC-DPF-SCR, emissions control configurations were employed. The accelerated Na aging is achieved by introducing elevated Na levels in the fuel, to represent full useful life exposure, and periodically increasing the exhaust temperature to replicate DPF regeneration. To assess the validity of the implemented accelerated Na aging protocol, engine-aged lean NO{sub x} traps (LNTs), DOCs and DPFs are also evaluated. To fully characterize the impact on the catalytic activity the LNT, DOC and SCR catalysts were evaluated using a bench flow reactor. The evaluation of the aged DOC samples and LNT show little to no deactivation as a result of Na contamination. However, the SCR in the light-duty configuration (DOC-SCR-DPF) was severely affected by Na contamination, especially when NO was the only fed NO{sub x} source. In the heavy-duty configuration (DOC-DPF-SCR), no impact is observed in the SCR NO{sub x} reduction activity. Electron probe micro-analysis (EPMA) reveals that Na contamination on the LNT, DOC, and SCR samples is present throughout the length of the catalysts with a higher concentration on the washcoat surface. In both the long-term engine-aged DPF and the accelerated Na-aged DPFs, there is significant Na ash present in the upstream channels; however, in the engine-aged sample lube oil-based ash is the predominant constituent.

Brookshear, D. William [University of Tennessee, Knoxville (UTK); Nguyen, Ke [University of Tennessee, Knoxville (UTK); Toops, Todd J [ORNL; Bunting, Bruce G [ORNL; Howe, Janet E [ORNL

2012-01-01T23:59:59.000Z

374

Spectroscopy of $^{28}$Na: shell evolution toward the drip line  

E-Print Network [OSTI]

Excited states in $^{28}$Na have been studied using the $\\beta$-decay of implanted $^{28}$Ne ions at GANIL/LISE as well as the in-beam $\\gamma$-ray spectroscopy at the NSCL/S800 facility. New states of positive (J$^{\\pi}$=3,4$^+$) and negative (J$^{\\pi}$=1-5$^-$) parity are proposed. The former arise from the coupling between 0d$\\_{5/2}$ protons and a 0d$\\_{3/2}$ neutron, while the latter are due to couplings with 1p$\\_{3/2}$ or 0f$\\_{7/2}$ neutrons. While the relative energies between the J$^{\\pi}$=1-4$^+$ states are well reproduced with the USDA interaction in the N=17 isotones, a progressive shift in the ground state binding energy (by about 500 keV) is observed between $^{26}$F and $^{30}$Al. This points to a possible change in the proton-neutron 0d$\\_{5/2}$-0d$\\_{3/2}$ effective interaction when moving from stability to the drip line. The presence of J$^{\\pi}$=1-4$^-$ negative parity states around 1.5 MeV as well as of a candidate for a J$^{\\pi}$=5$^-$ state around 2.5 MeV give further support to the collapse of the N=20 gap and to the inversion between the 0f$\\_{7/2}$ and 1p$\\_{3/2}$ levels below Z=12. These features are discussed in the framework of Shell Model and EDF calculations, leading to predicted negative parity states in the low energy spectra of the $^{26}$F and $^{25}$O nuclei.

A. Lepailleur; K. Wimmer; A. Mutschler; O. Sorlin; V. Bader; C. Bancroft; D. Barofsky; B. Bastin; T. Baugher; D. Bazin; V. Bildstein; C. Borcea; R. Borcea; B. A. Brown; L. Caceres; A. Gade; L. Gaudefroy; S. Grvy; G. F. Grinyer; H. Iwasaki; E. Khan; T. Krll; C. Langer; A. Lemasson; O. Llidoo; J. Lloyd; F. Negoita; F. de Oliveira Santos; G. Perdikakis; F. Recchia; T. Redpath; T. Roger; F. Rotaru; S. Saenz; M. -G. Saint-Laurent; D. Smalley; D. Sohler; M. Stanoiu; S. R. Stroberg; J. C. Thomas; M. Vandebrouck; D. Weisshaar; A. Westerberg

2015-03-30T23:59:59.000Z

375

Intracellular Sequestration of Sodium by a Novel Na /H Exchanger in Yeast Is Enhanced by Mutations in the  

E-Print Network [OSTI]

membrane Na /K -ATPase, a P-type ion pump, that drives Na ions out of the cell in exchange for K ions (1). The resultant Na gradient serves as the primary energy source for the transport of other ions and metabolites threat to agricultural production worldwide (4, 5). Because of a basic similarity in ion transport

Rao, Rajini

376

Balancing SoNaR: IPR versus Processing Issues in a 500-Million-Word Written Dutch Reference Corpus  

E-Print Network [OSTI]

Balancing SoNaR: IPR versus Processing Issues in a 500-Million-Word Written Dutch Reference Corpus included in SoNaR will have its IPR issues settled to the largest extent possible. This data collection lead to the creation of two corpora: a gigaword SoNaR, IPR-cleared for research purposes

Tilburg, Universiteit van

377

Non-oxidative reactions of propane on Zn/Na-ZSM5 Joseph A. Biscardi and Enrique Iglesia*  

E-Print Network [OSTI]

Non-oxidative reactions of propane on Zn/Na-ZSM5 Joseph A. Biscardi and Enrique Iglesia* Department rates during propane conversion at 773 K on Zn/Na-ZSM5 are about ten times higher than on Zn/H-ZSM5 catalysts with similar Zn content. The total rate of propane conversion is also higher on Zn/Na-ZSM5

Iglesia, Enrique

378

Polybrominated dibenzo-p-dioxins/dibenzofurans and polybrominated diphenyl ethers in soil, vegetation, workshop-floor dust, and electronic shredder residue from an electronic waste recycling facility and in soils from a chemical industrial complex in eastern China  

SciTech Connect (OSTI)

In this study, 11 2,3,7,8-substituted PBDD/Fs and 10 polybrominated diphenyl ether (PBDE) congeners were determined in electronic shredder waste, workshop-floor dust, soil, and leaves (of plants on the grounds of the facility) from a large-scale electronic wastes (e-waste) recycling facility and in surface soil from a chemical-industrial complex (comprising a coke-oven plant, a coal-fired power plant, and a chlor-alkali plant) as well as agricultural areas in eastern China. Total PBDD/F concentrations in environmental samples were in the range of 113-818 pg/g dry wt (dw) for leaves, 392-18,500 pg/g dw for electronic shredder residues, 716-80,0000 pg/g dw for soil samples, and 89,600-14,3000 pg/g dw for workshop-floor dust from the e-waste recycling facility and in a range from nondetect (ND) to 427 pg/g dw in soil from the chemical-industrial complex. The highest mean concentrations of total PBDD/Fs were found in soil samples and workshop-floor dust from the e-waste recycling facility. The dioxin-like toxic equivalent (measured as TEQ) concentrations of PBDD/Fs were greater than the TEQs of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) reported in our previous study for the same set of samples. The concentrations of PBDFs were several orders of magnitude higher than the concentrations of PBDDs in samples from the e-waste facility or from soil from the chemical-industrial complex. A significant correlation was found between the concentrations of {Sigma}PBDD/Fs and {Sigma}PBDEs (r = 0.769, p < 0.01) and between SPBDD/Fs and the previously reported SPCDD/F concentrations (r = 0.805, p < 0.01). The estimated daily human intakes of TEQs contributed by PBDD/Fs via soil/dust ingestion and dermal exposures in e-waste recycling facilities were higher than the intakes of TEQs contributed by PCDD/Fs, calculated in our previous study. 45 refs., 2 figs., 2 tabs.

Jing Ma; Rudolf Addink; Sehun Yun; Jinping Cheng; Wenhua Wang; Kurunthachalam Kannan [Shanghai Jiao Tong University, Shanghai (China). School of Environmental Science and Engineering

2009-10-01T23:59:59.000Z

379

E-Print Network 3.0 - anp na reducao Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

BY ANP high Na intake volume expansion normal L 2 0 IL- , 11----y7 --, 1 10 100 ANP infusion r-ate (rig... Physiological concentrations of ANP exert a dual regulatory influence...

380

High Density Hydrogen Storage System Demonstration Using NaAlH4  

E-Print Network [OSTI]

High Density Hydrogen Storage System Demonstration Using NaAlH4 Complex Compound Hydrides D. Mosher based storage systems, especially those which differ from conventional metal hydride systems, to meet

Note: This page contains sample records for the topic "butyl ether na" 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 - agroflorestal na zona Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9 tS5N: 0214-4557Fsica de La flerra 1998, n.' 10: 221-255 Summary: una consecuen- cia directa de la subduccin de la placa de Nazca bajo la placa Sudamerica- na. Si se......

382

Search for beta -delayed three-neutron emission frum /sup 31/Na  

E-Print Network [OSTI]

An upper limit P/sub 3n/<5*10/sup -4/ is found for the branching ratio of the beta -delayed three-neutron emission from /sup 31/Na. (5 refs).

Dtraz, C; Epherre-Rey-Campagnolle, Marcelle; Guillemaud, D; Klapisch, Robert; Langevin, M; Naulin, F; Thibault, C; Touchard, F

1981-01-01T23:59:59.000Z

383

Thermochemistry of phosphorus oxynitrides: PON and LiNaPON glasses  

SciTech Connect (OSTI)

High-temperature solution calorimetry has been very useful in elucidating the energetics of many oxide materials. Recently, a sodium molybdate melt, 3Na{sub 2}O{center{underscore}dot}4MoO{sub 3}, has been shown to be very effective for nitride calorimetry. This methodology has now been used to determine the energetics of formation of phosphorus oxynitride PON samples and of a series of LiNaPON oxynitride glasses. The magnitude of the energetics of nitrogen/oxygen substitution within PON and LiNaPON glasses has been correctly evaluated by using N-N, O-O, P-N, and P-O bond strengths. The in-situ precipitation of metallic particles from corresponding oxides in LiNaPON glasses has been predicted from high-temperature solution calorimetry results and appropriate thermodynamic cycles. The results constitute the first set of energetic data on nitridophosphates.

Tessier, F.; Navrotsky, A.; Le Sauze, A.; Marchand, R.

2000-01-01T23:59:59.000Z

384

Termination and complexity bounds for SAFE programs Salvador Lucas Ricardo Pe~na  

E-Print Network [OSTI]

Termination and complexity bounds for SAFE programs Salvador Lucas Ricardo Pe~na Dep. de Sistemas partially supported by the EU (FEDER) and the Spanish MEC, under grant TIN 2004-7943- C04. Salvador Lucas

Lucas, Salvador

385

E-Print Network 3.0 - al2o3 na obraztsakh Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the percentage of Al2O3 in (Al2O3 CaO Na2O K2O)) (Nesbitt... and Young, 1982), Vogt (1927) ratio (VR, defined as ... Source: Utrecht, Universiteit - Faculty of Earth...

386

E-Print Network 3.0 - atmosferica na regiao Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

48 Analise Matematica IV Licenciaturas: Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica Summary: regular, contida na regiao z C : 3 < Re(z) < 3 D(f), e tal que...

387

Catalytic Effect of Ti for Hydrogen Cycling in NaAlH4  

Broader source: Energy.gov (indexed) [DOE]

+ 2AlH 3 3 NaAlH 4 M. Mamula et al., Coll. Czechoslov. Chem. Commun. 32, 884 (1967). Atomic Hydrogen Interacting with Al Surfaces "H adsorption and the formation of alane...

388

Preparao de hbridos metal/carbono por carbonizao hidrotrmica para aplicao na oxidao eletroqumica de metanol.  

E-Print Network [OSTI]

??Neste trabalho foram preparados hbridos PtRu/Carbono e Ni/Carbono pelo mtodo da carbonizao hidrotrmica para aplicao na oxidao eletroqumica do metanol. Nesse processo, uma fonte de (more)

Marcelo Marques Tusi

2010-01-01T23:59:59.000Z

389

E-Print Network 3.0 - anemia falciforme na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

page (22-502 Summary: STUDIES OF FERRITIN-LIKE IRON I N RED BLOOD CELLS OF THALASSEMIA, SICKLE-CELL ANEMIA AND HEMOGLOBIN... . Aucune quan- tit6 de fer du type ferritine n'a btC...

390

E-Print Network 3.0 - anemia materna na Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

page (22-502 Summary: STUDIES OF FERRITIN-LIKE IRON I N RED BLOOD CELLS OF THALASSEMIA, SICKLE-CELL ANEMIA AND HEMOGLOBIN... . Aucune quan- tit6 de fer du type ferritine n'a btC...

391

Kinetic Study of Heterogeneous Reaction of Deliquesced NaCI Particles...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(1.1 ? Gaseous HNO3 uptake coefficient peaks around a relative humidity of 55%, with ?net 3 on sea salt particles was more rapid than that on the mixture of NaCl and...

392

E-Print Network 3.0 - atheriniformes atherinopsidae na Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(RS; bp), number of alleles (NA), average observed heterozygosity (HO), and average FIS and FST... This study Primer Sequence (5-3; Feldheim et al. in prep.) TA (C) RN RS...

393

Seismic Risk Assessment of Port Facilities Ung Jin Na, Samit Ray Chaudhuri  

E-Print Network [OSTI]

Seismic Risk Assessment of Port Facilities Ung Jin Na, Samit Ray Chaudhuri Faculty Advisor : Prof Estimation Methodology Applications (in progress) Port of Long Beach · Seismic Risk Assessment, Decision & Vertical movement, Settlement of Apron Seismic Vulnerability - quay Wall

Shinozuka, Masanobu

394

Impact of Biodiesel-Based Na on the Selective Catalytic Reduction...  

Broader source: Energy.gov (indexed) [DOE]

Biodiesel-Based Na on the Selective Catalytic Reduction (SCR) of NO x Using Cu-zeolite D. William Brookshear 1 , Todd J. Toops 2 , William Rohr 1 , Ke Nguyen 1 , and Bruce G....

395

E-Print Network 3.0 - alteracoes na sintese Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

de Movimento na etapa de s'intese, por'em devemos notar que os parametros gerados neste processo n... uma s'erie de etapas, que vao desde a s'intese dos dados de movimento,...

396

E-Print Network 3.0 - achados na artroscopia Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 Tera-feira, 17 de maio de 2011 Summary: universidades do Brasil e do exterior revelaram numerosos achados. Os mais recentes aconteceram na Expedio...

397

E-Print Network 3.0 - achados na tomografia Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 Tera-feira, 17 de maio de 2011 Summary: universidades do Brasil e do exterior revelaram numerosos achados. Os mais recentes aconteceram na Expedio...

398

E-Print Network 3.0 - anjos na escola Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ttulo do trabalho Eixo Situao Summary: na escola. 6 Aceito 8 MARIA DE FTIMA PEREIRA DE FREITAS No consta o ttulo 4 Aceito 9 MARILEA DE... Reestruturao do ensino...

399

E-Print Network 3.0 - artificiais na monitoracao Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Operacional, v.26, n.1, p.1-24, Janeiro a Abril de 2006 1 Summary: inspiradas na tomografia computadorizada que emitem radiao ao longo de todo o corpo do paciente 15......

400

Synthesis and characterization of hybrid materials based on 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid and Dawson-type tungstophosphate K{sub 7}[H{sub 4}PW{sub 18}O{sub 62}].18H{sub 2}O and K{sub 6}[P{sub 2}W{sub 18}O{sub 62}].13H{sub 2}O  

SciTech Connect (OSTI)

In this study, we synthesized hybrid materials using well-Dawson polyoxometalates (POMs), K{sub 7}[H{sub 4}PW{sub 18}O{sub 62}].18H{sub 2}O or K{sub 6}[P{sub 2}W{sub 18}O{sub 62}].13H{sub 2}O and a room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF{sub 4}]). K, W, P and CHN elemental analysis showed that one mole of [H{sub 4}PW{sub 18}O{sub 62}]{sup 7-} reacts with 6 moles of BMIM{sup +} and one mole of [P{sub 2}W{sub 18}O{sub 62}]{sup 6-} reacts with 4 moles of BMIM{sup +} to form, respectively, K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62} and K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62}. X-ray diffraction illustrated amorphous structure of the hybrid materials. FT-IR spectra showed the presence of both 1-butyl-3-methylimidazolium cation and the Dawson anion. TG analysis displayed a relative thermal stability of the hybrid materials compared to the parents Dawson POMs. Cyclic voltammetry showed that the reduction peak potentials of the Dawson anion in the hybrid materials shift towards negative values and the shift is more pronounced for K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62} compared to K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62}. This was attributed to a decrease in the acidity of the Dawson POM anion in the hybrid material. -- Graphical abstract: Powder XRD patterns of (a) PW{sub 18}, (b) K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62}, (c) P{sub 2}W{sub 18}, and (d) K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62}. Display Omitted Research highlights: {yields} 1-butyl-3-methylimidazolium tetrafluoroborate([BMIM][BF{sub 4}]) reacts with K{sub 7}[H{sub 4}PW{sub 18}O{sub 62}].18H{sub 2}O to form K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62}. {yields} [BMIM][BF{sub 4}] reacts with K{sub 6}[P{sub 2}W{sub 18}O{sub 62}].13H{sub 2}O to form K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62}. {yields} K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62} and K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62} displayed amorphous structures. {yields} K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62} and K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62} illustrated low water content. {yields} K[BMIM]{sub 6}H{sub 4}PW{sub 18}O{sub 62} and K{sub 2}[BMIM]{sub 4}P{sub 2}W{sub 18}O{sub 62} showed improved thermal stability.

Ammam, Malika, E-mail: m78ammam@yahoo.f [Department of Metallurgy and Materials Engineering (MTM), K.U Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee (Belgium); Fransaer, Jan [Department of Metallurgy and Materials Engineering (MTM), K.U Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee (Belgium)

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Increase of ionic conductivity in the microporous lithosilicate RUB-29 by Na-ion exchange processes  

SciTech Connect (OSTI)

The ionic conductivity in the zeolite-like lithosilicate RUB-29 (Cs{sub 14}Li{sub 24}[Li{sub 18}Si{sub 72}O{sub 172}].14H{sub 2}O [S.-H. Park, J.B. Parise, H. Gies, H. Liu, C.P. Grey, B.H. Toby, J. Am. Chem. Soc. 122 (2000) 11023-11024]) increases via simple ion-exchange processes, in particular when Na cations replace a part of Cs{sup +} and Li{sup +} of the material. The resulting ionic conductivity value of 3.2x10{sup -3} S cm{sup -1} at 885 K is about two orders higher than that for the original material [S.-H. Park, J.B. Parise, M.E. Franke, T. Seydel, C. Paulmann, Micropor. Mesopor. Mater., in print ( (doi:10.1016/j.micromeso.2007.03.040) available online since April 19, 2007)]. The structural basis of a Na{sup +}-exchanged RUB-29 sample (Na-RUB-29) at 673 K could be elucidated by means of neutron powder diffraction. Rietveld refinements confirmed the replacement of Na{sup +} for both parts of Cs and Li cations, agreeing with idealized cell content, Na{sub 8}Cs{sub 8}Li{sub 40}Si{sub 72}O{sub 172}. As a result of the incorporation of Na{sup +} in large pores, the number of Li{sup +} vacancies in dense Li{sub 2}O-layers of the structure could increase. This can be one of the main reasons for the improved conductivity in Na-RUB-29. In addition, mobile Na cations may also contribute to the conductivity in Na-RUB-29 as continuous scattering length densities were found around the sites for Na in difference Fourier map. - Graphical abstract: Li{sub 2}O-layers formed by edge- and corner-sharing LiO{sub 4}- and LiO{sub 3}-moieties in the zeolite-like lithosilicate RUB-29 provide optimal pathways for conducting Li{sup +}. The number of empty Li sites in this layer-like configuration could increase via 'simple' Na{sup +}-exchange processes, promoting fast Li motions.

Park, S.-H. [Section Crystallography, Earth and Environmental Sciences, Ludwig-Maximilians-Universitaet Muenchen, Theresienstr. 41, 80333 Munich (Germany)], E-mail: sohyun.park@lmu.de; Senyshyn, A. [Material- and Earth Sciences, Technische Universitaet Darmstadt, Petersenstr. 23, 64287 Darmstadt (Germany); Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Lichtenbergstr. 1, 85747 Garching (Germany); Paulmann, C. [Mineralogisch-Petrographisches Institut, Universitaet Hamburg, Grindelallee 48, 20146 Hamburg (Germany); HASYLAB, DESY, Notkestr. 85, 22603 Hamburg (Germany)

2007-12-15T23:59:59.000Z

402

Carbon monoxide adsorption/desorption processes over NaX zeolite and supported ruthenium catalyst  

SciTech Connect (OSTI)

The binding states of CO on NaX zeolite and RuNaX were investigated by thermal desorption spectroscopy. Desorption peaks centered at around 390, 430, 490, and 520 K were observed from NaX following room-temperature adsorption of CO. The activation energy values corresponding to these peaks were calculated to be 41.4, 45.7, 53.8, and 57.7 kJ mol{sup {minus}1}, respectively. These peaks were also observed in desorption profiles from RuNaX although their temperatures were higher by 10 to 20 K. In addition, the desorption spectra from RuNaX also comprise two high-temperature peaks at around 575 and 640 K. With both the RuNaX and the NaX samples the temperature and relative intensities of the desorption peaks depended on pretreatment conditions and on the lapsed time between CO exposure to the sample and the commencement of programmed heating. Mass spectral analysis revealed that the gas desorbed at 300-500 K consisted mainly of CO while at higher temperatures CO{sub 2} was the main component. The desorption peaks below 500 K are attributed to the release of carbon monoxide from structural and intragranular or intergranular zeolitic pores. Lewis sites on the zeolite surface are found to facilitate activation of CO, resulting in its transformation to CO{sub 2}. The initial adsorption of carbon monoxide in zeolite pores and subsequent diffusion to metal sites leading to its disproportionation/oxidation is found to play an important role in the CO adsorption/desorption process on RuNaX.

Kamble, V.S.; Gupta, N.M.; Iyer, R.M. (Bhabha Atomic Research Centre, Bombay (India))

1988-10-01T23:59:59.000Z

403

Crnica da III Feira da Sustentabilidade na UDC. Feira de Nadal 2012  

E-Print Network [OSTI]

Crónica da III Feira da Sustentabilidade na UDC. Feira de Nadal 2012 O pasado mércores 12 de universitaria a asistir á III Feira de Sustentabilidade que tivo lugar na Facultade de Economía e Empresa Sustentabilidade foi unha charla-debate en que Raúl Asegurado, presidente da Asociación Fiare Galiza, explicou en

Fraguela, Basilio B.

404

ISSN 0103-1538 4231 MONITORAMENTO DOS FOCOS DE CALOR NA REGIO SUL DO BRASIL  

E-Print Network [OSTI]

ISSN 0103-1538 4231 MONITORAMENTO DOS FOCOS DE CALOR NA REGI?O SUL DO BRASIL Instituto Nacional de monitorar a distribuição dos focos de calor na região sul do Brasil, entre os anos de 2003 a 2007, através, Geotecnologias, Região Sul do Brasil. RESUMEN Las quemadas pueden ser causadas de forma natural o por influencia

405

SISTEMATIZAO DE OCORRNCIAS DE DESASTRES NATURAIS NA REGIO SUL DO BRASIL EM 2011  

E-Print Network [OSTI]

Página1 SISTEMATIZA??O DE OCORR?NCIAS DE DESASTRES NATURAIS NA REGI?O SUL DO BRASIL EM 2011 Janete Aplicação de Geotecnologias para Desastres Naturais e Eventos Extremos para a Região Sul do Brasil e forma, a pesquisa tem como objetivo analisar os eventos de desastres naturais na Região Sul do Brasil em

406

Supporting information for: Na-doped p-type ZnO , Faxian Xiu2  

E-Print Network [OSTI]

S1 Supporting information for: Na-doped p-type ZnO microwires Wei Liu1* , Faxian Xiu2 , Ke Sun1 flow was switched to argon followed by cooling to room temperature. After the growth, high-density Zn distribution of the Na Doped ZnO microwire 1.3 EDX line scans spectra #12;S3 Figure S3 a) a typical TEM image

Yang, Zheng

407

Portugal lidera consrcio envolvido na produo de "energia limpa, segura e abundante"  

E-Print Network [OSTI]

Portugal lidera consórcio envolvido na produção de "energia limpa, segura e abundante" Autor: Data) - A produção de eletricidade a partir de fusão nuclear, considerada uma fonte de energia limpa, abundante e lidera consórcio envolvido na produção de "energia limpa, seg... http://sicnoticias.sapo.pt/Lusa/2013

Instituto de Sistemas e Robotica

408

Reactivity of the Quinone Methide of Butylated hydroxytoluene in Solution  

E-Print Network [OSTI]

BHT is a common antioxidant in pharmaceutical formulations and when oxidized it forms a quinone methide (QM). QM is a highly reactive electrophilic species which can undergo nucleophilic addition. This research investigated ...

Willcockson, Maren Gulsrud

2011-08-31T23:59:59.000Z

409

Conversion of Lignocellulosic Biomass to Ethanol Butyl Acrylate  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTieCelebrate EarthEnergy Contractor&3-1Program Managers

410

Stabilisation of Na,K-ATPase structure by the cardiotonic steroid ouabain  

SciTech Connect (OSTI)

Highlights: Ouabain binding to pig and shark Na,K-ATPase enhances thermal stability. Ouabain stabilises both membrane-bound and solubilised Na,K-ATPase. Synchrotron radiation circular dichroism is used for structure determination. Secondary structure in general is not affected by ouabain binding. Stabilisation is due to re-arrangement of tertiary structure. -- Abstract: Cardiotonic steroids such as ouabain bind with high affinity to the membrane-bound cation-transporting P-type Na,K-ATPase, leading to complete inhibition of the enzyme. Using synchrotron radiation circular dichroism spectroscopy we show that the enzyme-ouabain complex is less susceptible to thermal denaturation (unfolding) than the ouabain-free enzyme, and this protection is observed with Na,K-ATPase purified from pig kidney as well as from shark rectal glands. It is also shown that detergent-solubilised preparations of Na,K-ATPase are stabilised by ouabain, which could account for the successful crystallisation of Na,K-ATPase in the ouabain-bound form. The secondary structure is not significantly affected by the binding of ouabain. Ouabain appears however, to induce a reorganization of the tertiary structure towards a more compact protein structure which is less prone to unfolding; recent crystal structures of the two enzymes are consistent with this interpretation. These circular dichroism spectroscopic studies in solution therefore provide complementary information to that provided by crystallography.

Miles, Andrew J. [Institute of Structural and Molecular Biology, Birkbeck College, University of London, London WC1E 7HX (United Kingdom)] [Institute of Structural and Molecular Biology, Birkbeck College, University of London, London WC1E 7HX (United Kingdom); Fedosova, Natalya U. [Department of Biomedicine, Aarhus University, DK-8000 Aarhus (Denmark)] [Department of Biomedicine, Aarhus University, DK-8000 Aarhus (Denmark); Hoffmann, Sren V. [ISA, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus (Denmark)] [ISA, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus (Denmark); Wallace, B.A. [Institute of Structural and Molecular Biology, Birkbeck College, University of London, London WC1E 7HX (United Kingdom)] [Institute of Structural and Molecular Biology, Birkbeck College, University of London, London WC1E 7HX (United Kingdom); Esmann, Mikael, E-mail: me@biophys.au.dk [Department of Biomedicine, Aarhus University, DK-8000 Aarhus (Denmark)] [Department of Biomedicine, Aarhus University, DK-8000 Aarhus (Denmark)

2013-05-31T23:59:59.000Z

411

Band gap engineering for graphene by using Na{sup +} ions  

SciTech Connect (OSTI)

Despite the noble electronic properties of graphene, its industrial application has been hindered mainly by the absence of a stable means of producing a band gap at the Dirac point (DP). We report a new route to open a band gap (E{sub g}) at DP in a controlled way by depositing positively charged Na{sup +} ions on single layer graphene formed on 6H-SiC(0001) surface. The doping of low energy Na{sup +} ions is found to deplete the ?* band of graphene above the DP, and simultaneously shift the DP downward away from Fermi energy indicating the opening of E{sub g}. The band gap increases with increasing Na{sup +} coverage with a maximum E{sub g}?0.70?eV. Our core-level data, C 1s, Na 2p, and Si 2p, consistently suggest that Na{sup +} ions do not intercalate through graphene, but produce a significant charge asymmetry among the carbon atoms of graphene to cause the opening of a band gap. We thus provide a reliable way of producing and tuning the band gap of graphene by using Na{sup +} ions, which may play a vital role in utilizing graphene in future nano-electronic devices.

Sung, S. J.; Lee, P. R.; Kim, J. G.; Ryu, M. T.; Park, H. M.; Chung, J. W., E-mail: jwc@postech.ac.kr [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)

2014-08-25T23:59:59.000Z

412

Magnetic structure of the low-dimensional magnet NaCu{sub 2}O{sub 2}: {sup 63,65}Cu and {sup 23}Na NMR studies  

SciTech Connect (OSTI)

The magnetic structure of a quasi-one-dimensional frustrated NaCu{sub 2}O{sub 2} magnet single crystal is studied by NMR. The spatial orientation of the planar spin spirals in the copper-oxygen Cu{sup 2+}-O chains is determined, and its evolution as a function of the applied magnetic field direction is analyzed.

Sadykov, A. F., E-mail: sadykov@imp.uran.ru; Gerashchenko, A. P.; Piskunov, Yu. V.; Ogloblichev, V. V.; Smolnikov, A. G.; Verkhovskii, S. V.; Buzlukov, A. L.; Arapova, I. Yu. [Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation); Furukawa, Y. [Iowa State University, Ames Laboratory (United States); Yakubovskii, A. Yu. [National Research Centre Kurchatov Institute (Russian Federation); Bush, A. A. [Moscow State Technical University of Radio Engineering, Electronics, and Automation (Russian Federation)

2014-11-15T23:59:59.000Z

413

amine methanol, ether . Amine amine CO2  

E-Print Network [OSTI]

, . promoter . 1.2 CO2 HBGS process CO2 , CO2 . CO2 , IGCC (Integrated Gasification Combined Cycle) (fuel gas) CO2 . IGCC CO2 H2 . (gasification) CO H2 (water gas shift reaction) H2 CO CO2 . CO2 H2 turbine H2 . H2 , CO2 #12;. fuel gas CO2 40%, 60% H2 . fuel gas (gasification) HBGS process . CO2 CO2 . venture

Hong, Deog Ki

414

Search for compounds of the NaBaR(BO{sub 3}){sub 2} family (R = La, Nd, Gd, and Yb) and the new NaBaYb(BO{sub 3}){sub 2} orthoborate  

SciTech Connect (OSTI)

A search for compounds of the NaBaR(BO{sub 3}){sub 2} composition (where R = La{sup 3+}, Nd{sup 3+}, Gd{sup 3+}, or Yb{sup 3+}) is performed by solid state synthesis and spontaneous crystallization. A new compound, NaBaYb(BO{sub 3}){sub 2}, is found in this series. It crystallizes in space group R3{sup -} and belongs to the family of sublayer complex orthoborates with isolated BO{sub 3} groups NaBaR(BO{sub 3}){sub 2} (R = Y, Sc, and Yb). Theoretical X-ray powder diffraction patterns of NaBaY(BO{sub 3}){sub 2}, NaBaSc(BO{sub 3}){sub 2}, and NaBaYb(BO{sub 3}){sub 2} are calculated based on single-crystal data.

Svetlyakova, T. N., E-mail: svetlyakovatn@gmail.com; Kokh, A. E.; Kononova, N. G. [Russian Academy of Sciences, Sobolev Institute of Geology and Mineralogy, Siberian Branch (Russian Federation)] [Russian Academy of Sciences, Sobolev Institute of Geology and Mineralogy, Siberian Branch (Russian Federation); Fedorov, P. P. [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)] [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation); Rashchenko, S. V. [Russian Academy of Sciences, Sobolev Institute of Geology and Mineralogy, Siberian Branch (Russian Federation)] [Russian Academy of Sciences, Sobolev Institute of Geology and Mineralogy, Siberian Branch (Russian Federation); Maillard, A. [University of Metz and Supelec, Laboratoire Materiaux Optiques, Photonique et Systemes (France)] [University of Metz and Supelec, Laboratoire Materiaux Optiques, Photonique et Systemes (France)

2013-01-15T23:59:59.000Z

415

The synthesis and structural characterization of Na[sub 3]WO[sub 3]N  

SciTech Connect (OSTI)

The authors report the discovery of a new ternary oxynitride, Na[sub 3]WO[sub 3]N. Na[sub 3]WO[sub 3]N is synthesized by exposing a eutectic melt consisting of 1/2Na[sub 2]O:1Na[sub 2]WO[sub 4] to a flow of ammonia gas at 695[degrees]C. The compound crystallizes in the acentric space group Pmn2[sub 1] with a = 7.2481(3) [angstrom], b = 6.2728(3) [angstrom], and c = 56493(2) [angstrom]. The structure was determined from synchrotron X-ray powder diffraction data and refined using the Rietveld analysis on neutron powder diffraction data. It is isostructural to the low temperature form of Li[sub 3]PO[sub 4] which can be derived from an ordered wurtzite structure-type with all the atoms having tetrahedral coordination. Alternatively, the structure can be described as being [open quotes]salt-like[close quotes] consisting of isolated (WO[sub 3]N)[sup [minus]3] tetrahedral polyanions separated by Na[sup +].

Elder, S.H. (Cornell Univ., Ithaca, NY (United States) Institut des MJateriaux de Nantes, Nantes (France)); DiSalvo, F.J. (Cornell Univ., Ithaca, NY (United States)); Parise, J.B. (State Univ. of New York at Stony Brook, Stony Brook, NY (United States)); Hriljac, J.A. (Brookhaven National Lab., Upton, NY (United States)); Richardson, J.W. Jr. (Argonne National Lab., IL (United States))

1994-01-01T23:59:59.000Z

416

THE Na 8200 Angstrom-Sign DOUBLET AS AN AGE INDICATOR IN LOW-MASS STARS  

SciTech Connect (OSTI)

We investigate the use of the gravity sensitive neutral sodium (Na I) doublet at 8183 Angstrom-Sign and 8195 Angstrom-Sign (Na 8200 Angstrom-Sign doublet) as an age indicator for M dwarfs. We measured the Na doublet equivalent width (EW) in giants, old dwarfs, young dwarfs, and candidate members of the {beta} Pic moving group using medium-resolution spectra. Our Na 8200 A doublet EW analysis shows that the feature is useful as an approximate age indicator in M-type dwarfs with (V - K{sub s}) {>=} 5.0, reliably distinguishing stars older and younger than 100 Myr. A simple derivation of the dependence of the Na EW on temperature and gravity supports the observational results. An analysis of the effects of metallicity shows that this youth indicator is best used on samples with similar metallicity. The age estimation technique presented here becomes useful in a mass regime where traditional youth indicators are increasingly less reliable, is applicable to other alkali lines, and will help identify new low-mass members in other young clusters and associations.

Schlieder, Joshua E.; Simon, Michal [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States); Lepine, Sebastien; Rice, Emily [Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States); Fielding, Drummond [Department of Physics and Astronomy, Johns Hopkins University, 366 Bloomberg Center, 3400 North Charles Street, Baltimore, MD 21218 (United States); Tomasino, Rachael, E-mail: michal.simon@stonybrook.edu, E-mail: schlieder@mpia-hd.mpg.de, E-mail: lepine@amnh.org, E-mail: erice@amnh.org, E-mail: dfieldi1@jhu.edu, E-mail: tomas1r@cmich.edu [Department of Physics, Central Michigan University, Mount Pleasant, MI 48859 (United States)

2012-05-15T23:59:59.000Z

417

Polyclusters and Substitution Effects in the NaAuGa System: Remarkable Sodium Bonding Characteristics in Polar Intermetallics  

SciTech Connect (OSTI)

A systematic exploration of Na- and Au-poor parts of the NaAuGa system (less than 15 at. % Na or Au) uncovered several compounds with novel structural features that are unusual for the rest of the system. Four ternary compounds Na1.00(3)Au0.18Ga1.82(1) (I), NaAu2Ga4 (II), Na5Au10Ga16 (III), and NaAu4Ga2 (IV) have been synthesized and structurally characterized by single crystal X-ray diffraction: Na1.00(3)Au0.18Ga1.82(1)(I, P6/mmm, a = 15.181(2), c =9.129(2), Z = 30); NaAu2Ga4 (II, Pnma, a = 16.733(3), b = 4.3330(9), c =7.358(3) , Z = 4); Na5Au10Ga16 (III, P63/m, a = 10.754(2), c =11.457(2) , Z = 2); and NaAu4Ga2 (IV, P21/c, a = 8.292(2), b = 7.361(1), c =9.220(2), ? = 116.15(3), Z = 4). Compound I lies between the large family of Bergman-related compounds and Na-poor Zintl-type compounds and exhibits a clathrate-like structure containing icosahedral clusters similar to those in cubic 1/1 approximants, as well as tunnels with highly disordered cation positions and fused Na-centered clusters. Structures II, III, and IV are built of polyanionic networks and clusters that generate novel tunnels in each that contain isolated, ordered Na atoms. Tight-binding electronic structure calculations using linear muffin-tin-orbital (LMTO) methods on II, III, IV and an idealized model of I show that all are metallic with evident pseudogaps at the Fermi levels. The integrated crystal orbital Hamilton populations for IIIV are typically dominated by AuGa, GaGa, and AuAu bonding, although NaAu and NaGa contributions are also significant. Sodiums involvement into such covalency is consistent with that recently reported in NaAuM (M = Ga, Ge, Sn, Zn, and Cd) phases.

Smetana, Volodymyr [Ames Laboratory; Miller, Gordon J. [Ames Laboratory; Corbett, John D. [Ames Laboratory

2013-10-18T23:59:59.000Z

418

Caustic Recycle from Hanford Tank Waste Using NaSICON Ceramic Membrane Salt Splitting Process  

SciTech Connect (OSTI)

A family of inorganic ceramic materials, called sodium (Na) Super Ion Conductors (NaSICON), has been studied at Pacific Northwest National Laboratory (PNNL) to investigate their ability to separate sodium from radioactively contaminated sodium salt solutions for treating U.S. Department of Energy (DOE) tank wastes. Ceramatec Inc. developed and fabricated a membrane containing a proprietary NAS-GY material formulation that was electrochemically tested in a bench-scale apparatus with both a simulant and a radioactive tank-waste solution to determine the membrane performance when removing sodium from DOE tank wastes. Implementing this sodium separation process can result in significant cost savings by reducing the disposal volume of low-activity wastes and by producing a NaOH feedstock product for recycle into waste treatment processes such as sludge leaching, regenerating ion exchange resins, inhibiting corrosion in carbon-steel tanks, or retrieving tank wastes.

Fountain, Matthew S.; Kurath, Dean E.; Sevigny, Gary J.; Poloski, Adam P.; Pendleton, J.; Balagopal, S.; Quist, M.; Clay, D.

2009-02-20T23:59:59.000Z

419

Metal-insulator transition in Na{sub x}WO{sub 3}: Photoemission spectromicroscopy study  

SciTech Connect (OSTI)

We have investigated the validity of percolation model, which is quite often invoked to explain the metal-insulator transition in sodium tungsten bronzes, Na{sub x}WO{sub 3} by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases of high quality single crystals of Na{sub x}WO{sub 3} reveals the absence of any microscopic inhomogeneities embedded in the system within the experimental limit. Neither any metallic domains in the insulating host nor any insulating domains in the metallic host have been found to support the validity of percolation model to explain the metal-insulator transition in Na{sub x}WO{sub 3}.

Paul, Sanhita, E-mail: raj@iiserkol.ac.in; Ghosh, Anirudha, E-mail: raj@iiserkol.ac.in; Raj, Satyabrata, E-mail: raj@iiserkol.ac.in [Department of Physical Sciences, Indian Institute of Science Education and Research - Kolkata, Mohanpur Campus, Nadia -741252, West Bengal (India)

2014-04-24T23:59:59.000Z

420

Synthesis, characterization, and electrochemical studies of chemically synthesized NaFePO{sub 4}  

SciTech Connect (OSTI)

NaFePO{sub 4} is a naturally occurring mineral known as maricite. This compound has not been well characterized or examined for its potential use in battery applications. In the present study, NaFePO{sub 4} has been synthesized via the Pechini process with the resulting sample being characterized by X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Electrochemical properties have been investigated for possible application as a cathode in sodium-ion batteries. Electrodes of these materials were tested in coin cells using LiPF{sub 6} as the electrolyte and lithium metal as the counter electrode. Constant current cycling, cyclic voltammetry, and in situ frequency response analyses were performed. The results obtained demonstrate constant capacity or progressive increase in capacity with the consistently low internal resistance exhibited over consecutive cycles indicating possible application as a lithium analog in Na-ion batteries.

Sun, Ann; Beck, Faith R.; Haynes, Daniel; Poston, James A. Jr.; Narayanana, S.R.; Kumta, Prashant N.; A. Manivannan

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Determination of Na submonolayer adsorption site on Cu(111) by low-energy ion blocking  

SciTech Connect (OSTI)

The structure of a submonolayer coverage of sodium adsorbed on a Cu(111) surface at room temperature has been investigated using time-of-flight scattering and recoiling spectrometry. The effect of the adsorbed Na atoms on the angular distribution of scattered 2 keV H{sup +} ions is analyzed by molecular dynamics and scattering and recoiling imaging code simulations. It is shown that at a coverage {theta}=0.25 monolayer, Na atoms preferentially populate the fcc threefold surface sites with a height of 2.7{+-}0.1 A above the first-layer Cu atoms. At a lower coverage of {theta}=0.10 ML, there is no adsorption site preference for the Na atoms on the Cu(111) surface.

Zhang, R.; Makarenko, B. [Department of Chemistry, University of Houston, Houston, Texas 77204 (United States); Bahrim, B. [Department of Chemistry and Physics, Lamar University, Beaumont, Texas 77710 (United States); Rabalais, J. W. [Department of Chemistry, University of Houston, Houston, Texas 77204 (United States); Department of Chemistry and Physics, Lamar University, Beaumont, Texas 77710 (United States)

2007-09-15T23:59:59.000Z

422

Modeling the diffusion of Na+ in compacted water-saturated Na-bentonite as a function of pore water ionic strength  

SciTech Connect (OSTI)

Assessments of bentonite barrier performance in waste management scenarios require an accurate description of the diffusion of water and solutes through the barrier. A two-compartment macropore/nanopore model (on which smectite interlayer nanopores are treated as a distinct compartment of the overall pore space) was applied to describe the diffusion of {sup 22}Na{sup +} in compacted, water-saturated Na-bentonites and then compared with the well-known surface diffusion model. The two-compartment model successfully predicted the observed weak ionic strength dependence of the apparent diffusion coefficient (D{sub a}) of Na{sup +}, whereas the surface diffusion model did not, thus confirming previous research indicating the strong influence of interlayer nanopores on the properties of smectite clay barriers. Since bentonite mechanical properties and pore water chemistry have been described successfully with two-compartment models, the results in the present study represent an important contribution toward the construction of a comprehensive two-compartment model of compacted bentonite barriers.

Bourg, I.C.; Sposito, G.; Bourg, A.C.M.

2008-08-15T23:59:59.000Z

423

Estimativa do recurso contingente dos folhelhos olegenos da Formao Trememb, Bacia de Taubat, na regio de Trememb-Pindamonhangaba, SP.  

E-Print Network [OSTI]

??Esta dissertao tem como objetivo apresentar uma estimativa preliminar do volume de recurso contingente no-convencionais de folhelhos olegenos (oil shale) na Formao Trememb atravs de (more)

Leonardo Simes Pimentel

2012-01-01T23:59:59.000Z

424

The effect of NaCl salinity on bell pepper photosynthesis  

E-Print Network [OSTI]

annuum cv. Tambel-2, were grown in hydroponics and then salinized to 0, 50, 100 or 150 mM NaC1. Photosynthetic rates of individual leaves were measured on several occasions during the salinization period (usually 10 to 14 d) with an ' open' gas...-exchange system. These rates were reduced by NaC1 concentrations of 100 mM or higher. Stomatal conductance was concurrently reduced, but nonstomatal effects seem to be primarily responsible for decreases in photosynthesis. The correlation between either leaf...

Bethke, Paul Carl

1989-01-01T23:59:59.000Z

425

For-Ghaeltacht n Gaeltacht Fhoril? Mein Shisialta agus Forbairt na Gaeilge i Meirice Thuaidh  

E-Print Network [OSTI]

. Gan an mhais chriticiúil seo, is fíordheacair clann a thógáil le Gaeilge1, agus dá bharr sin is daoine seo, gur rud dona é seo. Tá a fhios agam go bhfuil roinnt daoine i Meiriceá Thuaidh a bhfuil Gaeilge pobal na Gaeltachta in ?irinn. Ceann de na fáthanna atá leis seo ná an easpa cainteoirí dúchais i

Scannell, Kevin Patrick

426

POST-OPERATIONAL TREATMENT OF RESIDUAL NA COOLLANT IN EBR-2 USING CARBONATION  

SciTech Connect (OSTI)

At the end of 2002, the Experimental Breeder Reactor Two (EBR-II) facility became a U.S. Resource Conservation and Recovery Act (RCRA) permitted site, and the RCRA permit1 compelled further treatment of the residual sodium in order to convert it into a less reactive chemical form and remove the by-products from the facility, so that a state of RCRA 'closure' for the facility may be achieved (42 U.S.C. 6901-6992k, 2002). In response to this regulatory driver, and in recognition of project budgetary and safety constraints, it was decided to treat the residual sodium in the EBR-II primary and secondary sodium systems using a process known as 'carbonation.' In early EBR-II post-operation documentation, this process is also called 'passivation.' In the carbonation process (Sherman and Henslee, 2005), the system containing residual sodium is flushed with humidified carbon dioxide (CO{sub 2}). The water vapor in the flush gas reacts with residual sodium to form sodium hydroxide (NaOH), and the CO{sub 2} in the flush gas reacts with the newly formed NaOH to make sodium bicarbonate (NaHCO{sub 3}). Hydrogen gas (H{sub 2}) is produced as a by-product. The chemical reactions occur at the exposed surface of the residual sodium. The NaHCO{sub 3} layer that forms is porous, and humidified carbon dioxide can penetrate the NaHCO{sub 3} layer to continue reacting residual sodium underneath. The rate of reaction is controlled by the thickness of the NaHCO{sub 3} surface layer, the moisture input rate, and the residual sodium exposed surface area. At the end of carbonation, approximately 780 liters of residual sodium in the EBR-II primary tank ({approx}70% of original inventory), and just under 190 liters of residual sodium in the EBR-II secondary sodium system ({approx}50% of original inventory), were converted into NaHCO{sub 3}. No bare surfaces of residual sodium remained after treatment, and all remaining residual sodium deposits are covered by a layer of NaHCO{sub 3}. From a safety standpoint, the inventory of residual sodium in these systems was greatly reduced by using the carbonation process. From a regulatory standpoint, the process was not able to achieve deactivation of all residual sodium, and other more aggressive measures will be needed if the remaining residual sodium must also be deactivated to meet the requirements of the existing environmental permit. This chapter provides a project history and technical summary of the carbonation of EBR-II residual sodium. Options for future treatment are also discussed.

Sherman, S.; Knight, C.

2011-03-08T23:59:59.000Z

427

Zdost o upustn od odborn pijmac zkousky do navazujcho magisterskho studia na MFF UK v Praze  

E-Print Network [OSTI]

pro akademický rok 2015/16 (zakrouzkujte dvod, který dokládáte a vyplte potebné údaje): dle bodu 1 absolventy nebo studenty posledního rocníku bakaláského studijního oboru Obecná fyzika 1701R026." dle bodu 2 oboru Fyzika zamená na vzdlávání 7504R183." dle bodu 3) ,,Od pijímací zkousky na magisterské studium

Cerveny, Vlastislav

428

Synthesis of Li{sub (x)}Na{sub (2-x)}Mn{sub 2}S{sub 3} and LiNaMnS{sub 2} through redox-induced ion exchange reactions  

SciTech Connect (OSTI)

Na{sub 2}Mn{sub 2}S{sub 3} was oxidatively deintercalated using iodine in acetonitrile to yield Na{sub 1.3}Mn{sub 2}S{sub 3}, with lattice constants nearly identical to that of the reactant. Lithium was then reductively intercalated into the oxidized product to yield Li{sub 0.7}Na{sub 1.3}Mn{sub 2}S{sub 3}. When heated, this metastable compound decomposed to form a new crystalline compound, LiNaMnS{sub 2}, along with MnS and residual Na{sub 2}Mn{sub 2}S{sub 3}. Single crystal X-ray diffraction structural analysis of LiNaMnS{sub 2} revealed that this compound crystallizes in P-3m1 with cell parameters a=4.0479(6) A, c=6.7759(14) A, V=96.15(3) A{sup 3} (Z=1, wR2=0.0367) in the NaLiCdS{sub 2} structure-type. - Graphical abstract: Structure of LiNaMnS{sub 2}. Li and Mn are statistically distributed in edge-shared tetrahedral environments linked into infinite planes. Sodium ions occupy interlayer sites.

Luthy, Joshua A.; Goodman, Phillip L. [Department of Chemistry and Biochemistry, Texas State University-San Marcos, 601 University Drive, San Marcos, TX 78666 (United States); Martin, Benjamin R. [Department of Chemistry and Biochemistry, Texas State University-San Marcos, 601 University Drive, San Marcos, TX 78666 (United States)], E-mail: bmartin@txstate.edu

2009-03-15T23:59:59.000Z

429

Loanwords in Kali'na, a Cariban language of French Guyana Odile Renault-Lescure  

E-Print Network [OSTI]

. It is constituted by the five Guianas: Venezuelan Guiana, (formerly British) Guyana, Suriname, French Guiana distributed in these countries. 11.141 live in Venezuela, 3000 in Guyana (Forte 2000), 3000 in Suriname (Boven% in Suriname; there is no precise data for French Guiana, but the rate is high). The Kali'na people speak

Boyer, Edmond

430

Non-Born-Oppenheimer molecular dynamics of NaFH photodissociation Ahren W. Jaspera  

E-Print Network [OSTI]

Non-Born-Oppenheimer molecular dynamics of Na¯FH photodissociation Ahren W. Jaspera Combustion 20 November 2007 The accuracy of non-Born-Oppenheimer electronically nonadiabatic semiclassical are re- stricted to a single Born-Oppenheimer electronic state typi- cally, the ground electronic state

Truhlar, Donald G

431

Na K -pump ligands modulate gating of palytoxin-induced ion channels  

E-Print Network [OSTI]

proteins that mediate transport of ions across cell membranes, they traditionally have been viewed as very to the extracellular surface. The 3Na 2K -exchange transport cycle is completed when two extracellular K ions bind ensure the vectorial nature of net transport. The occluded-ion conformations, with binding sites

Gadsby, David

432

ION CHANNELS The Na/K-ATPase/Src complex and cardiotonic  

E-Print Network [OSTI]

machine for the ATP-dependent and -coupled transport of Na+ and K+ across the plasma membrane of a living sarcoplasmic reticulum Ca-ATPase Introduction The P-type ATPases control ion fluxes across the cell membrane;allow the movement of ions across the cell membrane. They could also alter the function

Brand, Paul H.

433

Beta-delayed gamma spectroscopy of neutron rich 27,28,29Na  

SciTech Connect (OSTI)

The low-energy level structure of the exotic Na isotopes {sup 27,28,29}Na has been investigated through {beta}-delayed {gamma} spectroscopy. Detailed level structure of {sup 28,29}Na has been obtained through {beta}{gamma} and {beta}{gamma}{gamma} coincidence measurements. The low-lying levels populated in {sup 27}Na by {beta} decay were found to corroborate well with the in-beam data from the literature. Half-lives of the parent nuclides, {sup 27,28,29}Ne, were measured using {beta} fragment as well as fragment {beta}{gamma} coincidences and compared to previous measurements. The {beta}-delayed one- and two-neutron emission branching probabilities have been obtained from the {gamma} activities of the grand daughter nuclei. A comparison of the level schemes and the {beta}-decay branching ratios is made with shell-model predictions, both with and without intruder configurations, to understand the transition from normal-dominant to intruder-dominant excitations in these neutron-rich nuclei approaching the island of inversion.

Tripathi, V.; Tabor, S.L.; Hoffman, C.R.; Wiedeking, M.; Volya,A.; Mantica, P.F.; Davies, A.D.; Liddick, S.N.; Mueller, W.F.; Stolz, A.; Tomlin, B.E.

2006-05-04T23:59:59.000Z

434

{beta}-delayed {gamma} spectroscopy of neutron rich {sup 27,28,29}Na  

SciTech Connect (OSTI)

The low-energy level structure of the exotic Na isotopes {sup 27,28,29}Na has been investigated through {beta}-delayed {gamma} spectroscopy. Detailed level structure of {sup 28,29}Na has been obtained through {beta}{gamma} and {beta}{gamma}{gamma} coincidence measurements. The low-lying levels populated in {sup 27}Na by {beta} decay were found to corroborate well with the in-beam data from the literature. Half-lives of the parent nuclides, {sup 27,28,29}Ne, were measured using {beta} fragment as well as fragment {beta}{gamma} coincidences and compared to previous measurements. The {beta}-delayed one- and two-neutron emission branching probabilities have been obtained from the {gamma} activities of the grand daughter nuclei. A comparison of the level schemes and the {beta}-decay branching ratios is made with shell-model predictions, both with and without intruder configurations, to understand the transition from normal-dominant to intruder-dominant excitations in these neutron-rich nuclei approaching the island of inversion.

Tripathi, Vandana; Tabor, S.L.; Hoffman, C.R.; Wiedeking, M.; Volya, A.; Otsuka, T.; Utsuno, Y. [Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States); Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033 (Japan) and RIKEN, Hirosawa, Wako-shi, Saitama 351-0198 (Japan); Advanced Science Research Centre, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Mantica, P.F.; Liddick, S.N.; Tomlin, B.E. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States); Davies, A.D. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); Mueller, W.F.; Stolz, A. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

2006-05-15T23:59:59.000Z

435

Grant Title: NATIONAL ACADEMY OF EDUCATION/SPENCER POSTDOCTORAL FELLOWSHIP Funding Opportunity Number: N/A  

E-Print Network [OSTI]

Grant Title: NATIONAL ACADEMY OF EDUCATION/SPENCER POSTDOCTORAL FELLOWSHIP Funding Opportunity Number: N/A Agency/Department: The National Academy of Education/Spencer. Area of Research: Fellowship, 2011. Summary: TThe National Academy of Education/Spencer Postdoctoral Fellowship Program supports

Farritor, Shane

436

Hydrogen embrittlement of a bimaterial C. Ayas, N.A. Fleck, V.S. Deshpande  

E-Print Network [OSTI]

Hydrogen embrittlement of a bimaterial C. Ayas, N.A. Fleck, V.S. Deshpande Department, or increase susceptibility to corrosion or hydrogen embrittlement (Sireesha et al., 2000). The weld strength. Hydrogen embrittlement is a recognised threat for welded joints since hy- drogen take-up can arise during

Fleck, Norman A.

437

Super-Elastic and Plastic Shock Waves Generated by Lasers N.A. Inogamov a,1  

E-Print Network [OSTI]

Super-Elastic and Plastic Shock Waves Generated by Lasers N.A. Inogamov a,1 , V.V. Zhakhovsky b,3 fortov@ihed.ras.ru, i oleynik@usf.edu Keywords: Femtosecond laser-matter interactions, elastic-plastic there is an elastic shock wave (SW), which propagates before the strong plastic shock with plastic pressures of up

Fominov, Yakov

438

E-Print Network 3.0 - alongamento mesenterial na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

mutant... in Annexin V binding buffer (0.01 M Hepes, pH 7.4; 0.14 mM NaCl; 2.5 mM CaCl2). Two hundred microliters Source: Littman, Dan - Skirball Institute of Biomolecular...

439

E-Print Network 3.0 - alloiococcus otitidis na Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the frequency of the NotI target site. In contrast... H 7.6), 20 mM NaCl, and 1 mM CaCl2. Crystals of the apo enzyme were grown (2.0 M (NH4)2SO4, 100 mM MES Source: Stoddard,...

440

E-Print Network 3.0 - anodo na oxidacao Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(i.e., a biofilm that can efficiently transfer electrons... , 0.25-1.0 g; NH4Cl, 0.2 g; CaCl2,2H2O, 0.15 g; KCl, 0.33 g; NaCl, 0.30 g; MgCl2, 3.15 g; K2HPO4, 1... ). If methanogens...

Note: This page contains sample records for the topic "butyl ether na" 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

Measurement of (n,a) reactions on 147 Sm using a lead  

E-Print Network [OSTI]

12180, USA c Los Alamos Neutron Science Center Los Alamos National Laboratory, Los Alamos, New Mexico of the (n,a) cross section on 147 Sm and perform measurements on 149 Sm over the energy range 0.1 eV­10 ke limited because coulomb interaction prevents direct measurement at incident energies relevant

Danon, Yaron

442

Roles for Mitochondrial and Reverse Mode Na /Ca2 and the Plasmalemma Ca2  

E-Print Network [OSTI]

Roles for Mitochondrial and Reverse Mode Na /Ca2 Exchange and the Plasmalemma Ca2 ATPase in Post the processes regulating presynaptic cal- cium concentration ([Ca2 ]i ) in the generation of post-tetanic potentiation (PTP) at crayfish neuromuscular junctions, using spectrophotometric dyes to measure changes in [Ca

Zucker, Robert S.

443

Erratum: High-NA aberration retrieval with the Extended Nijboer-Zernike  

E-Print Network [OSTI]

of Technology, Lorentzweg 1, NL-2628 CJ Delft, The Netherlands P. Dirksen, A.J.E.M. Janssen Philips Research Europe, Professor Holstlaan 4, NL-5656 AA Eindhoven, The Netherlands In the paper "High-NA aberration regrettable notation errors are present in Eq.(10), page 06004-3. The expression gives the azimuthal Fourier

444

Design, Fabrication and Integration of a NaK-Cooled Circuit  

SciTech Connect (OSTI)

The Early Flight Fission Test Facilities (EFF-TF) team has been tasked by the NASA Marshall Space Flight Center Nuclear Systems Office to design, fabricate, and test an actively pumped alkali metal flow circuit. The system, which was originally designed for use with a eutectic mixture of sodium potassium (NaK), was redesigned for use with lithium. Due to a shift in focus, it is once again being prepared for use with NaK. Changes made to the actively pumped, high temperature circuit include the replacement of the expansion reservoir, addition of remotely operated valves, and modification of the support table. Basic circuit components include: reactor segment, NaK to gas heat exchanger, electromagnetic (EM) liquid metal pump, load/drain reservoir, expansion reservoir, instrumentation, and a spill reservoir. A 37-pin partial-array core (pin and flow path dimensions are the same as those in a full design) was selected for fabrication and test. This paper summarizes the integration and preparations for the fill of the pumped NaK circuit. (authors)

Garber, Anne; Godfroy, Thomas [NASA Marshall Space Flight Center, MSFC, AL 35824 (United States)

2006-07-01T23:59:59.000Z

445

Upper limit on the cross section for reactor antineutrinos changing 22Na decay rates  

E-Print Network [OSTI]

In this paper we present results of a long-term observation of the decay of 22Na in the presence of a nuclear fission reactor. The measurements were made outside the containment wall of and underneath the Koeberg nuclear power plant near Cape Town, South Africa. Antineutrino fluxes ranged from ~5*10^11 to 1.6*10^13 cm^-2 s^-1 during this period. We show that the coincidence summing technique provides a sensitive tool to measure a change in the total decay constant as well as the branching ratio between EC and beta+ decay of 22Na to the first excited state in 22Ne. We observe a relative change in count rate between reactor-ON and reactor-OFF equal to (-0.51+/-0.11)*10^-4. After evaluating possible systematic uncertainties we conclude that the effect is either due to a hidden instrumental cause or due to an interaction between antineutrinos and the 22Na nucleus. An upper limit of ~0.03 barn has been deduced for observing any change in the decay rate of 22Na due to antineutrino interactions.

R. J. de Meijer; S. W. Steyn

2014-09-23T23:59:59.000Z

446

Departamento de Electronica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru~na  

E-Print Network [OSTI]

Departamento de Electr´onica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru 2004­ p.1/29 #12;Departamento de Electr´onica e Sistemas Grupo de Arquitectura de Computadores´onica e Sistemas Grupo de Arquitectura de Computadores Universidade da Coru~na AC LUCEH Curriculum Vitae

Fraguela, Basilio B.

447

Cellular/Molecular Vestibular Hair Bundles Control pH with (Na , K )/H  

E-Print Network [OSTI]

Cellular/Molecular Vestibular Hair Bundles Control pH with (Na , K )/H Exchangers NHE6 and NHE9 21205, and 3Graduate School of Life Science, University of Hyogo, Ako, Hyogo 678-1297, Japan In hair acidify mechani- cally sensitive hair bundles without efficient removal of H . We found that, whereas

Rao, Rajini

448

Advances in X-Ray Chemical Analysis, Japan, 45 (2014) ISSN 0911-7806 Color Center in NaCl  

E-Print Network [OSTI]

. In addition, the color of NaCl changes to pale purple when irradiated with 405 nm laser after X-ray irradiation and to light brown when irradiated with 532 nm laser after X-ray irradiation. The colorCl, Sodium chloride, X-ray irradiation, Laser irradiation, White fluorescent lamp irradiation X X NaCl X X X

Jun, Kawai

449

Calcite dissolution and Ca/Na ion-exchange reactions in columns with different flow rates through high ESR soil  

E-Print Network [OSTI]

min? under conditions of saturated flow. Column eluate was monitored for pH, carbonate alkalinity, and Na, Ca and Cl concentrations to evaluate the elution of SAR 10 solution, dissolution of CaCO? and exchange of Na by Ca on the cation...

Navarre, Audrey

1999-01-01T23:59:59.000Z

450

Effects of the treatment of straw with NaOH and urea solutions on ingestibility and digestibility in sheep  

E-Print Network [OSTI]

Effects of the treatment of straw with NaOH and urea solutions on ingestibility and digestibility of digestibility measures. The main results appear in table I. Straw intake and digestibility were in- creased by the treatments. This was par- ticularly true for NaOH treatments with the exception of nitrogen digestibility

Paris-Sud XI, Universit de

451

Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass  

E-Print Network [OSTI]

distribution and speciation of Na, Mg, Ni and Cs in a simulated (inactive) nuclear waste glass were studied and Cs represent dose determining long-lived radionuclides (59 Ni, 135 Cs) in vitrified nuclear wasteNa, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear

452

Background studies for NaI(Tl) detectors in the ANAIS dark matter project  

SciTech Connect (OSTI)

Several large NaI(Tl) detectors, produced by different companies, have been operated in the Canfranc Underground Laboratory (LSC) in the frame of the ANAIS (Annual modulation with NaI Scintillators) project devoted to the direct detection of dark matter. A complete background model has been developed for a 9.6 kg detector (referred as ANAIS-0 prototype) after a long data taking at LSC. Activities from the natural chains of {sup 238}U and {sup 232}Th, and {sup 40}K in the NaI(Tl) crystal were evaluated applying different methods: discrimination of alpha particles vs beta/gamma background by Pulse Shape Analysis for quantifying the content of the natural chains and coincidence techniques for {sup 40}K. Radioactive contaminations in the detector and shielding components were also determined by HPGe spectrometry. Monte Carlo simulations using Geant4 package were carried out to evaluate their contribution. At high energies, most of the measured background is nicely reproduced; at low energy some non-explained components are still present, although some plausible background sources have been analyzed. The {sup 40}K content of the NaI(Tl) crystal has been confirmed to be the dominant contributor to the measured background with this detector. In addition, preliminary results of the background characterization, presently underway at the LSC, of two recently produced NaI(Tl) detectors, with 12.5 kg mass each, will be presented: cosmogenic induced activity has been clearly observed and is being quantified, and {sup 40}K activity at a level ten times lower than in ANAIS-0 has been determined.

Amar, J.; Borjabad, S.; Cebrin, S.; Cuesta, C.; Fortuo, D.; Garca, E.; Ginestra, C.; Gmez, H.; Martnez, M.; Olivn, M. A.; Ortigoza, Y.; Solrzano, A. Ortiz de; Pobes, C.; Puimedn, J.; Sarsa, M. L.; Villar, J. A.; Villar, P. [Laboratorio de Fsica Nuclear y Astropartculas, Universidad de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, Spain and Laboratorio Subterrneo de Canfranc, Paseo de los Ayerbe s/n, 22880 Canfranc Estacin, Huesca (Spain)] [Laboratorio de Fsica Nuclear y Astropartculas, Universidad de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, Spain and Laboratorio Subterrneo de Canfranc, Paseo de los Ayerbe s/n, 22880 Canfranc Estacin, Huesca (Spain)

2013-08-08T23:59:59.000Z

453

Cleaning residual NaK in the fast flux test facility fuel storage cooling system  

SciTech Connect (OSTI)

The Fast Flux Test Facility (FFTF), located on the U.S. Department of Energy's Hanford Reservation, is a liquid metal-cooled test reactor. The FFTF was constructed to support the U.S. Liquid Metal Fast Breeder Reactor Program. The bulk of the alkali metal (sodium and NaK) has been drained and will be stored onsite prior to final disposition. Residual NaK needed to be removed from the pipes, pumps, heat exchangers, tanks, and vessels in the Fuel Storage Facility (FSF) cooling system. The cooling system was drained in 2004 leaving residual NaK in the pipes and equipment. The estimated residual NaK volume was 76 liters in the storage tank, 1.9 liters in the expansion tank, and 19-39 liters in the heat transfer loop. The residual NaK volume in the remainder of the system was expected to be very small, consisting of films, droplets, and very small pools. The NaK in the FSF Cooling System was not radiologically contaminated. The portions of the cooling system to be cleaned were divided into four groups: 1. The storage tank, filter, pump, and associated piping; 2. The heat exchanger, expansion tank, and associated piping; 3. Argon supply piping; 4. In-vessel heat transfer loop. The cleaning was contracted to Creative Engineers, Inc. (CEI) and they used their superheated steam process to clean the cooling system. It has been concluded that during the modification activities (prior to CEI coming onsite) to prepare the NaK Cooling System for cleaning, tank T-914 was pressurized relative to the In-Vessel NaK Cooler and NaK was pushed from the tank back into the Cooler and that on November 6, 2005, when the gas purge through the In-Vessel NaK Cooler was increased from 141.6 slm to 283.2 slm, NaK was forced from the In-Vessel NaK Cooler and it contacted water in the vent line and/or scrubber. The gases from the reaction then traveled back through the vent line coating the internal surface of the vent line with NaK and NaK reaction products. The hot gases also exited the scrubber through the stack and due to the temperature of the gas, the hydrogen auto ignited when it mixed with the oxygen in the air. There was no damage to equipment, no injuries, and no significant release of hazardous material. Even though the FSF Cooling System is the only system at FFTF that contains residual NaK, there are lessons to be learned from this event that can be applied to future residual sodium removal activities. The lessons learned are: - Before cleaning equipment containing residual alkali metal the volume of alkali metal in the equipment should be minimized to the extent practical. As much as possible, reconfirm the amount and location of the alkali metal immediately prior to cleaning, especially if additional evolutions have been performed or significant time has passed. This is especially true for small diameter pipe (<20.3 centimeters diameter) that is being cleaned in place since gas flow is more likely to move the alkali metal. Potential confirmation methods could include visual inspection (difficult in all-metal systems), nondestructive examination (e.g., ultrasonic measurements) and repeating previous evolutions used to drain the system. Also, expect to find alkali metal in places it would not reasonably be expected to be. - Staff with an intimate knowledge of the plant equipment and the bulk alkali metal draining activities is critical to being able to confirm the amount and locations of the alkali metal residuals and to safely clean the residuals. - Minimize the potential for movement of alkali metal during cleaning or limit the distance and locations into which alkali metal can move. - Recognize that when working with alkali metal reactions, occasional pops and bangs are to be anticipated. - Pre-plan emergency responses to unplanned events to assure responses planned for an operating reactor are appropriate for the deactivation phase.

Burke, T.M.; Church, W.R. [Fluor Hanford, PO Box 1000, Richland, Washington, 99352 (United States); Hodgson, K.M. [Fluor Government Group, PO Box 1050, Richland, Washington, 99352 (United States)

2008-01-15T23:59:59.000Z

454

Synthesis of octane enhancer during slurry-phase Fischer-Tropsch. Quarterly technical progress report No. 4, July 1, 1991--September 30, 1991  

SciTech Connect (OSTI)

The objective of this project is to investigate three possible routes to the formation of ethers, in particular methyl tert-butyl ether (MTBE), during slurry phase Fischer-Tropsch reaction. The three reaction schemes to be investigated are: Addition of isobutylene during the formation of methanol and/or higher alcohols directly from CO and H{sub 2} during slurry-phase Fischer-Tropsch. Addition of isobutylene to FT liquid products including alcohols in a slurry-phase reactor containing an MTBE or other acid catalyst. Addition of methanol to slurry phase FT synthesis making iso-olefins.

Marcelin, G.

1991-12-15T23:59:59.000Z

455

Synthesis of octane enhancers during slurry-phase Fischer-Tropsch. Quarterly technical progress report No. 5, October 1, 1991--December 31, 1991  

SciTech Connect (OSTI)

The objective of this project is to investigate three possible routes to the formation of ethers, in particular methyl tert-butyl ether (MTBE), during slurry phase Fischer-Tropsch reaction. The three reaction schemes to be investigated are: Addition of isobutylene during the formation of methanol and/or higher alcohols directly from CO and H{sub 2} during slurry-phase Fischer-Tropsch. Addition of isobutylene to FT liquid products including alcohols in a slurry-phase reactor containing an MTBE or other acid catalyst. Addition of methanol to slurry phase FT synthesis making iso-olefins.

Marcelin, G.

1992-06-10T23:59:59.000Z

456

The use Na, Li, K cations for modification of ZSM-5 zewolite to control hydrocarbon cold-start emission  

SciTech Connect (OSTI)

This paper addresses the problem of controlling hydrocarbon emissions from cold-start of engines by investigating the adsorbents which could adsorb the hydrocarbons at cold temperatures and hold them to 250-300 ?. The materials, that has been studied, are based on the modification of ZSM-5 (SiO{sub 2}/Al{sub 2}O{sub 3} = 35) zeolite with Li, K, Na cations. It has been shown that the introduction of Li, Na and K in an amount that is equivalent to the content of Al in zeolite results in occurrence of toluene temperature desorption peaks at high-temperatures. The toluene temperature desorption curves for 5%Li-ZSM-5 and 2.3%Na-ZSM-5 zeolites are identical and have peak toluene desorption rate between 200 to 400 ?. Upon analysis of toluene adsorption isotherms for 2.3%Na-ZSM-5 and 5%Li-ZSM-5, it was concluded that the toluene diffusion inside of the modified zeolites channels is extremely slow and the sorption capacity of 2.3%Na-ZSM-5 is higher than with 5%Li-ZSM-5. The 2.3%Na-ZSM-5 didn't change toluene temperature programmed desorption (TPD) rate of curve after the treatment in environment with 10% ?{sub 2}? at 750-800 ? for about 28 h. The 2.3%Na-ZSM-5 zeolite is very promising as adsorbent to control the cold-start hydrocarbon emissions.

Golubeva V.; Rohatgi U.; Korableva, A.; Anischenko, O.; Kustov, L.; Nissenbaum, V; Viola, M.B.

2012-08-29T23:59:59.000Z

457

Defective graphene as promising anode material for Na-ion battery and Ca-ion battery  

E-Print Network [OSTI]

We have investigated adsorption of Na and Ca on graphene with divacancy (DV) and Stone-Wales (SW) defect. Our results show that adsorption is not possible on pristine graphene. However, their adsorption on defective sheet is energetically favorable. The enhanced adsorption can be attributed to the increased charge transfer between adatoms and underlying defective sheet. With the increase in defect density until certain possible limit, maximum percentage of adsorption also increases giving higher battery capacity. For maximum possible DV defect, we can achieve maximum capacity of 1459 mAh/g for Na-ion batteries (NIBs) and 2900 mAh/g for Ca-ion batteries (CIBs). For graphene full of SW defect, we find the maximum capacity of NIBs and CIBs is around 1071 mAh/g and 2142 mAh/g respectively. Our results will help create better anode materials with much higher capacity and better cycling performance for NIBs and CIBs.

Datta, Dibakar; Shenoy, Vivek B

2013-01-01T23:59:59.000Z

458

Densities and refractive indexes of aqueous (Li,K,Na) NO[sub 3] mixtures  

SciTech Connect (OSTI)

This paper describes experimental procedures and techniques for measuring densities and/or refractive indexes of aqueous salt solutions between 25 and 200 [degrees]C and with 18.90-90.50 wt % mixed salt (LINO[sub 3], KNO[sub 3], and NaNO[sub 3]). An electrolyte solution of (LI, K, Na) NO[sub 3] slats in water was chosen for study because of its recent development as a potential high-temperature heat pump fluid, but any other appropriate fluid may be accommodated for study in the apparatus. The densities and refractive indexes are shown to represent a convenient way to measuring the concentration of salt (or water), and accuracies of [plus minus]0.8 and [plus minus]0.3 wt % total mixed salt were achieved by using the above two methods, respectively.

Ally, M.R.; Zaltash, A.; Linkous, R.L. (Oak Ridge National Lab., TN (United States). Energy Div.); Klatt, L.N. (Oak Ridge National Lab., TN (United States). Analytical Chemistry Div.)

1991-04-01T23:59:59.000Z

459

DALI2: A NaI(Tl) detector array for measurements of $?$ rays from fast nuclei  

E-Print Network [OSTI]

A NaI(Tl) detector array called DALI2 (Detector Array for Low Intensity radiation 2) has been constructed for in-beam $\\gamma$-ray spectroscopy experiments with fast radioactive isotope (RI) beams. It consists typically of 186 NaI(Tl) scintillators covering polar angles from $\\sim$15$^{\\circ}$ to $\\sim$160$^{\\circ}$ with an average angular resolution of 6$^{\\circ}$ in full width at half maximum. Its high granularity (good angular resolution) enables Doppler-shift corrections that result in, for example, 10% energy resolution and 20% full-energy photopeak efficiency for 1-MeV $\\gamma$ rays emitted from fast-moving nuclei (velocities of $v/c \\simeq 0.6$). DALI2 has been employed successfully in numerous experiments using fast RI beams with velocities of $v/c = 0.3 - 0.6$ provided by the RIKEN RI Beam Factory.

S. Takeuchi; T. Motobayashi; Y. Togano; M. Matsushita; N. Aoi; K. Demichi; H. Hasegawa; H. Murakami

2014-06-24T23:59:59.000Z

460

High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides  

SciTech Connect (OSTI)

This final report describes the motivations, activities and results of the hydrogen storage independent project "High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides" performed by the United Technologies Research Center under the Department of Energy Hydrogen Program, contract # DE-FC36-02AL67610. The objectives of the project were to identify and address the key systems technologies associated with applying complex hydride materials, particularly ones which differ from those for conventional metal hydride based storage. This involved the design, fabrication and testing of two prototype systems based on the hydrogen storage material NaAlH4. Safety testing, catalysis studies, heat exchanger optimization, reaction kinetics modeling, thermochemical finite element analysis, powder densification development and material neutralization were elements included in the effort.

Daniel A. Mosher; Xia Tang; Ronald J. Brown; Sarah Arsenault; Salvatore Saitta; Bruce L. Laube; Robert H. Dold; Donald L. Anton

2007-07-27T23:59:59.000Z

Note: This page contains sample records for the topic "butyl ether na" 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

Introduction L'Encyclopdie des Carabes ou Encyclopdie des Kali'na du Suriname  

E-Print Network [OSTI]

Introduction « L'Encyclopédie des Caraïbes » ou Encyclopédie des Kali'na du Suriname Odile Renault Suriname, jusqu'à la deuxième moitié du 20ème siècle5, pour désigner les peuples et langues de famille étude comparée des langues de la famille caribe du Suriname, ainsi que des descriptions grammaticales et

Boyer, Edmond

462

{alpha}-particle optical potentials for nuclear astrophysics (NA) and nuclear technology (NT)  

SciTech Connect (OSTI)

The high precision of recent measurements for low-energy {alpha}-particle elastic-scattering as well as induced-reaction data makes possible the understanding of actual limits and possible improvement of the global optical model potentials parameters. Involvement of recent optical potentials for reliable description of both the elastic scattering and emission of {alpha}-particles, of equal interest for nuclear astrophysics (NA) and nuclear technology (NT) for fusion devices, is discussed in the present work.

Avrigeanu, V.; Avrigeanu, M. [Horia Hulubei National Institute for Physics and Nuclear Engineering, POBox MG-6, 077125 Magurele, Ilfov (Romania)

2012-11-20T23:59:59.000Z

463

VII Seminrio Tcnico Cientfico de Anlise dos Dados do Desmatamento na Amaznia Legal  

E-Print Network [OSTI]

VII Seminário Técnico Científico de Análise dos Dados do Desmatamento na Amazônia Legal Base em Atividades Produtivas 363,75 44,72 (319,03) -88% Defesa do Pantanal com a Valorização da em Setembro de 2009. #12;Dados Gleba Curuá Alertas de Desmatamento (DETER) em 2009 ­ Jan/Set Classe

464

Threshold model and the latest NA50 data on $J/?$ suppression in Pb+Pb collisions  

E-Print Network [OSTI]

Using the QGP motivated threshold model, where all the $J/\\psi$'s are suppressed above a threshold density, we have analyzed the latest version of the NA50 data on the centrality dependence of the $J/\\psi$ over Drell-Yan ratio. The data are not well explain in the model, unless the threshold density is largely smeared. Large smeared threshold density effectively excludes creation of any deconfined medium in the collision.

A. K. Chaudhuri

2003-05-26T23:59:59.000Z

465

Sistematizao de ocorrncias de desastres naturais na regio Sul do Brasil Silvia Midori Saito1  

E-Print Network [OSTI]

Sistematização de ocorrências de desastres naturais na região Sul do Brasil Silvia Midori Saito1 - GEODESASTRES-SUL Caixa Postal 5021 - CEP: 97110-970, Santa Maria, RS, Brasil {silvia.saito; camila próximo artigo 39 Anais XIV Simpósio Brasileiro de Sensoriamento Remoto, Natal, Brasil, 25-30 abril 2009

466

LIVROS DIDTICOS E SUAS FUNES PARA O PROFESSOR DE MATEMTICA NO BRASIL E NA FRANA.  

E-Print Network [OSTI]

LIVROS DIDÁTICOS E SUAS FUN??ES PARA O PROFESSOR DE MATEMÁTICA NO BRASIL E NA FRAN?A. Clovis Gomes (França) GP 0517 Psicologia da educação matemática ­UNICAMP Campinas SP (Brasil) Jean dois países. No Brasil a compra de livros didáticos pelo governo brasileiro envolve volumes e cifras de

Paris-Sud XI, Université de

467

20Na  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience hands-onASTROPHYSICS H.CarbonMarch Value of the verb5N

468

20Na  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience hands-onASTROPHYSICS H.CarbonMarch Value of the verb5N

469

na-00  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF8/%2A en Responding6/%2A2/%2A en2/%2A

470

19Na  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience hands-on halloweenReliable7O(α, X)C β--Decay Evaluated Datap,NNa

471

Br-Cl-Na systematics in Illinois basin fluids: Constraints on fluid origin and evolution  

SciTech Connect (OSTI)

The authors present here bromide, chloride, and sodium data for fluids from reservoirs of Ordovician through Pennsylvania age in the Illinois basic which suggest that remnant marine fluids contribute significantly to fluid Cl budgets. Cl/Br and NaBr ratios for Ordovician through Devonian formation fluids are relatively uniform and near those for seawater, despite greater than a factor of ten range in Cl concentration. In contrast, fluids from Mississippian and Pennsylvanian reservoirs, separated from older reservoirs by the New Albany Shale Group, have more variable fluid Cl/Br and Na/Br ratios, most of which are significantly greater then those of seawater. The 1:1 stoichiometry of Cl and Na increases for Mississippian and Pennsylvanian formation fluids is consistent with halite dissolution. Nevertheless, Br systematics and mass-balance considerations indicate that he overall Cl budget of Illinois basin formation fluids appears to be more significantly influenced by the contribution from subaerially evaporated seawater than by halite dissolution.

Walter, L.M.; Huston, T.J. (Washington Univ., St. Louis, Missouri (USA)); Stueber, A.M. (Southern Illinois Univ., Edwardsville (USA))

1990-04-01T23:59:59.000Z

472

High-temperature corrosion of metallic alloys in an oxidizing atmosphere containing NaCl  

SciTech Connect (OSTI)

A particular heat-exchanger application involved metallic alloys exposed to flue gases of an aluminum remelt furnace. Because the flue gases might contain NaCl and other halides, the corrosion behavior of the alloys was to be investigated. Planned direct exposure of candidate alloys to the flue gases, however, was not conducted because of premature termination of the project. Complementary laboratory testing was conducted on seven commercially available alloys and two nickel aluminides. These materials were exposed to an oxidizing atmosphere containing 0.06 wt % NaCl for 1100 h at 1000/degree/C. Most of the alloy exhibited grain-boundary attack, which resulted in complete oxidation of enveloped grains. The alloys Incoloy MA-956, Incoloy 800, Inconel 625, Inconel 601, Hastelloy X, Haynes 188, and nickel aluminide IC-50 were substantially more corroded than Alloy 214 and nickel aluminide IC-221. The latter two alloys, therefore, would probably be superior to the others in application involving flue gases containing NaCl. Strength fabricability, and weldability, which are briefly discussed, would also affect selection of materials. 8 refs., 12 figs., 5 tabs.

Federer, J.I.

1989-02-01T23:59:59.000Z

473

Equilibrium thermodynamic analysis of liquid-phase ethyl tert-butylether (ETBE) synthesis  

SciTech Connect (OSTI)

Methyl tertiary butyl ether (MTBE) is now the second largest volume organic chemical, only behind ethylene, produced in the U.S. This is remarkable since its commercial production began barely two decades ago. Although MTBE is currently the industry standard, it has been proposed that ethanol and other renewable additives make up to 30% of the oxygenate market. As a result, ethyl tertiary butyl ether (ETBE, or 2-ethyoxy 2-methyl propane), derived from renewable ethanol and isobutylene, has emerged as a promising new oxygenate. ETBE also has a somewhat lower blending Reid vapor pressure as well as a higher octane number than MTBE. This paper describes the thermodynamic equilibrium constant for the production of ETBE.

Jensen, K.L.; Datta, R. [Univ. of Iowa, Iowa City, IA (United States)

1994-12-31T23:59:59.000Z

474

Role of Cl in Electrogenic Na -coupled Cotransporters GAT1 and Received for publication, August 10, 2000, and in revised form, September 5, 2000  

E-Print Network [OSTI]

criterion to classify Na cotransporters. Electrogenic sodium cotransporters utilize the movement of Na down, nutrients, and neu- rotransmitters into cells (1). This broad group of Na -driven cotransporters contains potential in most cells is close to the resting membrane potential, and little free energy would be provided

Eskandari, Sepehr

475

Saudi MTBE project revived  

SciTech Connect (OSTI)

Alujain Corp., a member of the Xenel group of Saudi Arabia, is going ahead with plans to build an 800,000-m.t./year methyl tert-butyl ether (MTBE) plant. Bechtel has been appointed project manager for the plant, which will be owned by a new company, National Fuel Additives (Tahseen). Bechtel will help evaluate proposals already submitted for the lump sum turnkey job.

NONE

1996-01-17T23:59:59.000Z

476

MTBE from butadiene-rich C/sub 4/s  

SciTech Connect (OSTI)

Methyl tert-butyl ether (MTBE), is made by reacting methanol with isobutylene. The preferred source of isobutylene is a steam cracker C/sub 4/ cut from which butadiene has been removed. However, moving the MTBE synthesis upstream of the butadiene extraction will improve the extraction step. The following is a review of conditions imposed on the MTBE unit's design and operation when placed in this new location.

Ancillotti, F.; Pescarollo, E.; Szatmari, E.; Lazar, L.

1987-12-01T23:59:59.000Z

477

Two US markets, or one? How the MTBE-gasoline relationship is evolving  

SciTech Connect (OSTI)

This issue of Energy Detente features the price sensitivity of Methyl Tertiary Butyl Ether. Data is presented for US wholesale gasoline prices vs. MTBE for the 20-month period beginning in June 1994 and ending in January 1996, and the data is discussed. Also contained in this issue is the refining netback data and the fuel price/tax data for the period ending January 5, 1996.

NONE

1996-01-26T23:59:59.000Z

478

Statoil outlines MTBE development program  

SciTech Connect (OSTI)

This paper reports that Norway's state oil company Den Norkse state Oljeselskap AS has outlined plans to become one of the major European producers of methyl tertiary butyl ether in the 1990s. Statoil predicts European demand for MTBE will jump to 4.5 million metric tons/year by 2000 from 2.5 million tons in 1990. Europe currently is a net importer of MTBE, with a productive capacity of 2.2 million tons/year.

Not Available

1991-11-25T23:59:59.000Z

479

E-Print Network 3.0 - aqueous na2s2o3 solutions Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Harris, 7th Summary: the molar concentration of the solution. Preparation and standardization of 0.1 M Na2S2O3. Boil about 500 m... with the ... Source: McQuade, D. Tyler -...

480

computational infrastructure for nuclear astrophysics Michael Smith, Physics Division, Oak Ridge Na:onal Lab coordinator@nucastrodata.org  

E-Print Network [OSTI]

computational infrastructure for nuclear astrophysics Michael Smith, Physics Division, Oak Ridge Na:onal Lab coordinator@nucastrodata.org #12;computational infrastructure for nuclear astrophysics system overview ·work with nuclear information, reaction rates, & simulations ·operates "in

Note: This page contains sample records for the topic "butyl ether na" 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

Identification of a Pool of Non-Pumping Na/K-ATPase* Man Liang1,3  

E-Print Network [OSTI]

Identification of a Pool of Non-Pumping Na/K-ATPase* Man Liang1,3 , Jiang Tian1,3 , Lijun Liu1 Title: Non-pumping Na/K-ATPase 4 To whom correspondence should be addressed: Zi-Jian Xie, Ph-383-4182; FAX: 419-383-2871 E-mail: zxie@meduohio.edu Summary Recent studies have ascribed many non-pumping

Brand, Paul H.

482

TRANSFER OF CONTINUOUSLY I. V. INFUSED NaHC14O3 AND Ca47Cl2  

E-Print Network [OSTI]

TRANSFER OF CONTINUOUSLY I. V. INFUSED NaHC14O3 AND Ca47Cl2 TO THE HEN'S EGG-SHELL (1) K. L?RCHER experiment was designed : after continuous i.v. infusion of Ca&dquo;C12 and/or NaHC1403 to achieve constant&dquo;/Sc&dquo;. RESULTS AND DISCUSSION The average egg-shell incorporation of continuously infused Ca&dquo; came out

Paris-Sud XI, Université de

483

Investigation of the ion exchange equilibrium between NA+, Ca++, Mg++, and a sulfonated polystyrene resin at various concentrations  

E-Print Network [OSTI]

INVESTIGATiON OF THE ION EXCHANGE EQUILIBRIUM BETWEEN Na , Ca++, Mg++, AND A SULFONATED POLYSTYRENE RESIN AT VARIOUS CONCENTRATIONS A THESIS BY WILLIAM FRANKLIN McILHENNY 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 January 1958 MaJor Subject: Chemical Engineering INVESTIGATION OF THE ION EXCHANGE EQUILIBRIUM BFTWEEN Na+, Ca++ Mg++ AND A SULFONATED POLYSTYRENE RESIN...

McIlhenny, William Franklin

1958-01-01T23:59:59.000Z

484

Capture isobutylene with glycol  

SciTech Connect (OSTI)

The separation of butenes present in C-4 streams (generated as a result of steam or catalytic cracking) is becoming increasingly important as the butenes find expanded applications in the production of methyl-t-butyl ether (MTBE), methyl methacrylate, butyl rubber, and linear low-density polyethylene. Available methods of separation include selective extraction with a liquid solvent (usually an acid); the use of addition reactions with suitable alcohols, acids, or water; selective polymerization and physical separation by absorbents. Three currently important separation processes for isobutylene production are an extraction route using mineral acid, the dehydration of tert-butanol, and the cracking of MTBE. As part of the research into solid acid catalysis for the generation of glycol tert-butyl monoethers, the authors have demonstrated an alternative C-4 separation process using solid inorganic acid catalysts and involving the intermediate preparation of glycol ethers. This new C-4 separation scheme could be particularly attractive to existing glycol producers who may also have a market, or internal need, for glycol monoalkyl ethers, as well as those who do not have MTBE capacity but still require pure isobutylene as a chemical intermediate or comonomer building block. The process is described.

Knifton, J.F. (Texaco Chemical's Austin Research Lab. TX (United States))

1994-05-01T23:59:59.000Z

485

Syntheses, crystal structures, and properties of three new metal selenites Na{sub 2}Co{sub 2}(SeO{sub 3}){sub 3}, Na{sub 2}Co{sub 1.67}Ni{sub 0.33}(SeO{sub 3}){sub 3}, and Na{sub 2}Ni{sub 2}(SeO{sub 3}){sub 3}  

SciTech Connect (OSTI)

Three new sodium cobalt (nickel) selenite compounds, namely, Na{sub 2}Co{sub 2}(SeO{sub 3}){sub 3}, Na{sub 2}Co{sub 1.67}Ni{sub 0.33}(SeO{sub 3}){sub 3}, and Na{sub 2}Ni{sub 2}(SeO{sub 3}){sub 3} have been hydro-/solvothermally synthesized in the mixed solvents of acetonitrile and water. Single-crystal X-ray diffraction analyses reveal that these isostructural compounds belong to the orthorhombic Cmcm space group and their structures feature three-dimensional open frameworks constructed by the two-dimensional layers of [MSeO{sub 3}] pillared by the [SeO{sub 3}]{sup 2-} groups. The two different types of Na{sup +} ions reside in the intersecting two-dimensional channels parallel to the a- and c-axes, respectively. Their thermal properties have been investigated via TGA-DSC. The magnetic measurements indicate the existence of the antiferromagnetic interactions in these compounds. - Graphical abstract: Three new isostructural metal selenites, Na{sub 2}Co{sub 2}(SeO{sub 3}){sub 3}, Na{sub 2}Co{sub 1.67}Ni{sub 0.33}(SeO{sub 3}){sub 3}, and Na{sub 2}Ni{sub 2}(SeO{sub 3}){sub 3} have been hydro-/solvothermally synthesized and characterized. Their structures feature three-dimensional open frameworks with Na{sup +}-occupied channels.

Yuan Xiaoqing [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China); Feng Meiling, E-mail: fml@fjirsm.ac.c [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China); Li Jianrong [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China); Huang Xiaoying, E-mail: xyhuang@fjirsm.ac.c [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)

2010-09-15T23:59:59.000Z

486

NA-42 TI Shared Software Component Library FY2011 Final Report  

SciTech Connect (OSTI)

The NA-42 TI program initiated an effort in FY2010 to standardize its software development efforts with the long term goal of migrating toward a software management approach that will allow for the sharing and reuse of code developed within the TI program, improve integration, ensure a level of software documentation, and reduce development costs. The Pacific Northwest National Laboratory (PNNL) has been tasked with two activities that support this mission. PNNL has been tasked with the identification, selection, and implementation of a Shared Software Component Library. The intent of the library is to provide a common repository that is accessible by all authorized NA-42 software development teams. The repository facilitates software reuse through a searchable and easy to use web based interface. As software is submitted to the repository, the component registration process captures meta-data and provides version control for compiled libraries, documentation, and source code. This meta-data is then available for retrieval and review as part of library search results. In FY2010, PNNL and staff from the Remote Sensing Laboratory (RSL) teamed up to develop a software application with the goal of replacing the aging Aerial Measuring System (AMS). The application under development includes an Advanced Visualization and Integration of Data (AVID) framework and associated AMS modules. Throughout development, PNNL and RSL have utilized a common AMS code repository for collaborative code development. The AMS repository is hosted by PNNL, is restricted to the project development team, is accessed via two different geographic locations and continues to be used. The knowledge gained from the collaboration and hosting of this repository in conjunction with PNNL software development and systems engineering capabilities were used in the selection of a package to be used in the implementation of the software component library on behalf of NA-42 TI. The second task managed by PNNL is the development and continued maintenance of the NA-42 TI Software Development Questionnaire. This questionnaire is intended to help software development teams working under NA-42 TI in documenting their development activities. When sufficiently completed, the questionnaire illustrates that the software development activities recorded incorporate significant aspects of the software engineering lifecycle. The questionnaire template is updated as comments are received from NA-42 and/or its development teams and revised versions distributed to those using the questionnaire. PNNL also maintains a list of questionnaire recipients. The blank questionnaire template, the AVID and AMS software being developed, and the completed AVID AMS specific questionnaire are being used as the initial content to be established in the TI Component Library. This report summarizes the approach taken to identify requirements, search for and evaluate technologies, and the approach taken for installation of the software needed to host the component library. Additionally, it defines the process by which users request access for the contribution and retrieval of library content.

Knudson, Christa K.; Rutz, Frederick C.; Dorow, Kevin E.

2011-07-21T23:59:59.000Z

487

Electroless Ni coatings used in 4% NaCl corrosion control of mild steel  

SciTech Connect (OSTI)

The purpose of this work is to study the behavior of electroless Ni coatings on SAE 1020 steel in aqueous 4% NaCl solution. An aqueous solution with NiSO{sub 4}.6H{sub 2}O (Nickel Sulfate), NaH{sub 2}PO{sub 2}.2H{sub 2}O (Sodium Hypophosphite), C{sub 3}H{sub 6}O{sub 3} (Lactic Acid), C{sub 3}H{sub 6}O{sub 2} (Propionic Acid) and Pb(NO{sub 3}){sub 2} (Lead Nitrate) as the basic ingredients of the bath was selected for the autocatalytic deposition of Ni, with an average deposit rate of c.a. 19 {micro}m/h. Steel coupons were immersed in the bath for 1, 2, 3 h in the original solution, renewing with fresh solution every hour. Once coated with nickel, the coupons were subjected to heat treatment for 1, 2, and 3 h at 400 C, measuring hardness to determine how it is affected by thermal treatment. Salt-spray tests were carried out at 30 C in line with ASTM B117-75 and DIN 50907 standards. The corrosion rate was determined by potentiodynamic polarizing curves (0.28.10{sup {minus}3} V/s), using a 4.0% w/w NaCl solution. Corrosion resistance was higher in the coupons that underwent 2--3 h of heat treatment and 2--3 h plating time. Corrosion rate varied between 2.41 and 3.40 {micro}m/y. The surface of the coupons in the salt spray chamber had a good appearance at the end of the 568-hour test.

Sanchez, M.A.; Zambrano, J.A.; Perez, O. [Univ. del Zulia, Maracaibo (Venezuela). Centro de Estudios de Corrosion; Podesta, J.J. [Univ. Nacional de La Plata (Argentina). Inst. de Investigaciones Fisicoquimicas Teoricas y Aplicadas

1997-12-01T23:59:59.000Z

488

Magnetoelastic Coupling and Symmetry Breaking in the Frustrated Antiferromagnet {alpha}-NaMnO{sub 2}  

SciTech Connect (OSTI)

The magnetic and crystal structures of the {alpha}-NaMnO{sub 2} have been determined by high-resolution neutron powder diffraction. The system maps out a frustrated triangular spin lattice with anisotropic interactions that displays two-dimensional spin correlations below 200 K. Magnetic frustration is lifted through magneto-elastic coupling, evidenced by strong anisotropic broadening of the diffraction profiles at high temperature and ultimately by a structural phase transition at 45 K. In this low-temperature regime a three-dimensional antiferromagnetic state is observed with a propagation vector k=((1/2),(1/2),0)

Giot, Maud [Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Vassilika Vouton, 71110 Heraklion (Greece); ISIS, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton-Didcot, OX11 0QX, Oxfordshire (United Kingdom); Chapon, Laurent C.; Radaelli, Paolo G. [ISIS, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton-Didcot, OX11 0QX, Oxfordshire (United Kingdom); Androulakis, John; Lappas, Alexandros [Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Vassilika Vouton, 71110 Heraklion (Greece); Green, Mark A. [NIST Center for Neutron Research, 100 Bureau Drive, Gaithersburg, Maryland 20899-8562 (United States); Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115 (United States)

2007-12-14T23:59:59.000Z

489

Tako imenovani Na?rt za pridigo iz rokopisne dobe sloven?ine  

E-Print Network [OSTI]

?mlicherweise ist aber die Akkusa- tivrektion gebraucht (wahrscheinlich als Analogie: Ia + Acc. 'f?r'). naIega Pron. poss. 1. P. PI. m. Gen. Sg. in -ega. goIpudy Subst. m. des i-Stammes (wie im CRR, SR, KR, SGR) pr?sentiert hier den U-Reflex des ursl. o, was ein... Zeichen der no- tranjgina oder der dolenjSCina sein kann. tu Adv. loc. mod. slow. tu 'hier' oder Pron. dem. N. Sg. n. mod. slow. to mit dem U-Ref lex. Iy k?nnte das Reflexivpronomen si sein. Semantisch m??te es aber als ie 'noch' in- terpretiert...

Mikhailov, Nikolai

1999-01-01T23:59:59.000Z

490

Publisher's note: Branching ratios for the beta decay of Na-21 (vol 74, pg 015501, 2006)  

E-Print Network [OSTI]

PHYSICAL REVIEW C 74, 029901(E) (2006) Publisher?s Note: Branching ratios for the ? decay of 21Na [Phys. Rev. C 74, 015501 (2006)] V. E. Iacob, J. C. Hardy, C. A. Gagliardi, J. Goodwin, N. Nica, H. I. Park, G. Tabacaru, L. Trache, R. E. Tribble..., Y. Zhai, and I. S. Towner (Received 31 July 2006; published 11 August 2006) DOI: 10.1103/PhysRevC.74.029901 PACS number(s): 27.30.+t, 23.40.?s, 99.10.Fg This paper was published online on 14 July 2006 with formatting errors in Eqs. (7) and (9...

Iacob, V. E.; Hardy, John C.; Gagliardi, Carl A.; Goodwin, J.; Nica, N.; Park, H. I.; Tabacaru, G.; Trache, L.; Tribble, Robert E.; Zhai, Y.; Towner, I. S.

2006-01-01T23:59:59.000Z

491

Thermonuclear reaction rate of $^{18}$Ne($?$,$p$)$^{21}$Na from Monte-Carlo calculations  

E-Print Network [OSTI]

The $^{18}$Ne($\\alpha$,$p$)$^{21}$Na reaction impacts the break-out from the hot CNO-cycles to the $rp$-process in type I X-ray bursts. We present a revised thermonuclear reaction rate, which is based on the latest experimental data. The new rate is derived from Monte-Carlo calculations, taking into account the uncertainties of all nuclear physics input quantities. In addition, we present the reaction rate uncertainty and probability density versus temperature. Our results are also consistent with estimates obtained using different indirect approaches.

P. Mohr; R. Longland; C. Iliadis

2014-12-14T23:59:59.000Z

492

Thermonuclear reaction rate of $^{18}$Ne($\\alpha$,$p$)$^{21}$Na from Monte-Carlo calculations  

E-Print Network [OSTI]

The $^{18}$Ne($\\alpha$,$p$)$^{21}$Na reaction impacts the break-out from the hot CNO-cycles to the $rp$-process in type I X-ray bursts. We present a revised thermonuclear reaction rate, which is based on the latest experimental data. The new rate is derived from Monte-Carlo calculations, taking into account the uncertainties of all nuclear physics input quantities. In addition, we present the reaction rate uncertainty and probability density versus temperature. Our results are also consistent with estimates obtained using different indirect approaches.

Mohr, P; Iliadis, C

2014-01-01T23:59:59.000Z

493

NA-ASC-500-13 Issue 26 ASC eNews Quarterly Newsletter  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource ProgramModificationEnzyme-FunctionalizedCirculatoryoNA-ASC-500-13

494

OFFICE OF CIVIL RIGHTS NA-1.2 VIDEO LIBRARY Item Title  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS NA-1.2 VIDEO LIBRARY Item

495

Office of Civil Rights NA-1.2 VIDEO LIBRARY Item Title  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS NA-1.2 VIDEOConflict

496

Office of Civil Rights NA-1.2 VIDEO LIBRARY Item Title  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS NA-1.2 VIDEOConflictMental

497

Office of Civil Rights NA-1.2 VIDEO LIBRARY Item Title  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS NA-1.2

498

Office of Civil Rights NA-1.2 VIDEO LIBRARY Item Title  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Review of theOFFICE OF CIVIL RIGHTS NA-1.2APAC w/ Nancy

499

NaRec New and Renewable Energy Centre | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte3Informationof Energy Calculator29 Jump to:NaRec New and

500

NaSt1: A Wolf-Rayet star cloaked by an eta Car--like nebula?  

E-Print Network [OSTI]

We present a study of the peculiar Galactic emission line object NaSt1 (WR122, IRAS 18497+0056) which has previously been classified as a Wolf-Rayet (WR) star. Our spectroscopic dataset comprises Keck I-HIRES, WHT-ISIS and UKIRT-CGS4 observations which show that NaSt1 has a highly reddened nebular spectrum with extremely strong permitted and forbidden lines covering a wide range in excitation. [OII-III] is unusually weak, with HeI-II and [NII] very strong, and carbon absent, suggestive of chemical peculiarities. Narrow-band WHT imaging reveals an elliptical nebula with an average diameter of 6.8arcsec. We measure an interstellar extinction of E(B-V)=2.1mag and estimate a distance of 1-3kpc, suggesting that NaSt1 is a luminous object, with 40.64, N enhanced by a factor of 20, O deficient by a factor of 140, while Ne, Ar and S are normal compared to average HII region abundances. This unusual abundance pattern suggests that the nebula consists of fully CNO-processed material. We compare the spectral appearance of NaSt1 with other luminous emission objects, and conclude that it is not an Ofpe/WN9, B[e] star or symbiotic nova although it does share several characteristics of these systems. We suggest instead that NaSt1 contains a massive evolved star that ejected its heavily CNO-processed outer layers a few thousand years ago. Although the stellar remnant is completely hidden from view by the dense nebula, we argue that the star must be an early-type WR star. The only object that shares some of the peculiarities of NaSt1 is eta Carinae. Whatever its true nature, NaSt1 should no longer be considered as a late-WN classification standard in the near-IR.

Paul A. Crowther; Linda J. Smith

1999-03-26T23:59:59.000Z