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Note: This page contains sample records for the topic "methyl isobutyl ketone" from the National Library of EnergyBeta (NLEBeta).
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1

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

E-Print Network (OSTI)

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

Dommer, Richard Alvin

2012-06-07T23:59:59.000Z

2

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

3

Engineering of Bacterial Methyl Ketone Synthesis for Biofuels  

Science Journals Connector (OSTI)

...composition to optimize diesel fuel properties. Supplemental...for the synthesis of fuels and chemicals. Nature...2003. Tools for genetic engineering in the amino acid-producing...Knothe, G . 2008. biodiesel: optimizing fatty ester composition to improve fuel properties. Energy Fuels...

Ee-Been Goh; Edward E. K. Baidoo; Jay D. Keasling; Harry R. Beller

2011-10-28T23:59:59.000Z

4

LETTER 2911 Stability Relationships in Bicyclic Ketones  

E-Print Network (OSTI)

. Intuitively, most of us are aware that bicyclo[3.3.0]octanes prefer cis fusion by a sufficient energy margin is to provide calculated energy differences of bicyclo[m.3.0]alkanones as iso- meric pairs with respect Stuttgart · New York Abstract: Calculated energy differences between cis- and trans- fused bicyclic ketones

Hudlicky, Tomas

5

The Risk Assessment Information System  

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

Condensed Toxicity Summary for METHYL ISOBUTYL KETONE Condensed Toxicity Summary for METHYL ISOBUTYL KETONE NOTE: Although the toxicity values presented in these toxicity profiles were correct at the time they were produced, these values are subject to change. Users should always refer to the Toxicity Value Database for the current toxicity values. July 1995 Prepared by Rosmarie A. Faust, Ph.D., Chemical Hazard Evaluation and Communication Program, Biomedical and Environmental Information Analysis Section, Health Sciences Research Division, *, Oak Ridge, Tennessee. Prepared for OAK RIDGE RESERVATION ENVIRONMENTAL RESTORATION PROGRAM. *Managed by Lockheed Martin Energy Systems, Inc., for the U.S. Department of Energy under Contract No. DE-AC05-84OR21400. Methyl isobutyl ketone (MIBK) (CAS Reg. No. 108-10-1), a clear liquid with

6

E-Print Network 3.0 - alcohols ketones alkanediols Sample Search...  

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

hydrogenation (TH) of ketones under basic conditions employing ... Source: Stradiotto, Mark - Department of Chemistry, Dalhousie University Collection: Chemistry 33 CHEMISTRY...

7

Oligomerization and Catalytic Ketonization in the Mixalco™ Process  

E-Print Network (OSTI)

–3 Depending how many steps are employed, the final product is ketones, alcohols, or hydrocarbons. Potential biomass feedstocks include municipal solid waste, animal manure, and energy crops.4–8 The MixAlco™ process is a version of the carboxylate platform...

Taco Vasquez, Sebastian

2013-10-29T23:59:59.000Z

8

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

SciTech Connect

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

Berg, L.

1993-07-20T23:59:59.000Z

9

Engineering of Ralstonia eutropha H16 for Autotrophic and Heterotrophic Production of Methyl Ketones  

Science Journals Connector (OSTI)

...monitoring system (RAMOS). The general set-up and operation of the...fermentation, a CO2 measuring cycle was continuously repeated; the measuring cycle consisted of a 240-min measuring...the acyl-CoAs entering the cycle. In this context, one can...

Jana Müller; Daniel MacEachran; Helcio Burd; Noppadon Sathitsuksanoh; Changhao Bi; Yi-Chun Yeh; Taek Soon Lee; Nathan J. Hillson; Swapnil R. Chhabra; Steven W. Singer; Harry R. Beller

2013-05-17T23:59:59.000Z

10

E-Print Network 3.0 - alkyl methyl ketones Sample Search Results  

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

l S e m e s t e r 1 9 9 7 Summary: . These acetylides are nucleophilic enough to undergo SN2 reactions with alkyl halides. There are two steps involved... : (a) formation of the...

11

E-Print Network 3.0 - a-stereogenic ketone moiety Sample Search...  

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

of Physics, Harvard University Collection: Physics 28 Synthesis and Reactivity of (DMSC)Ti(2-OCAr2)L2 Complexes (DMSC ) Dimethylsilyl-Bridged Summary: of the ketone moiety of...

12

Key Intermediates in Combinatorial Chemistry:? Access to Various Heterocycles from ?,?-Unsaturated Ketones on the Solid Phase  

Science Journals Connector (OSTI)

The value of ?,?-unsaturated ketones as key intermediates for the combinatorial assembly of four different templates on the solid phase, namely pyrimidines, dihydropyrimidinones, pyridines, and pyrazoles, was explored with individual syntheses of variably ...

Andreas L. Marzinzik; Eduard R. Felder

1998-01-22T23:59:59.000Z

13

Photoinduced Hydrogen Abstraction from Phenols by Aromatic Ketones. A New Mechanism for Hydrogen Abstraction by  

E-Print Network (OSTI)

Photoinduced Hydrogen Abstraction from Phenols by Aromatic Ketones. A New Mechanism for Hydrogen carried out of the kinetics of inter- and intramolecular phenolic hydrogen abstraction phenolic hydrogen, which yields the corresponding phenoxyl-hemipinacol biradical. The biradicals have also

Leigh, William J.

14

The Risk Assessment Information System  

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

Formal Toxicity Summary for METHYL ISOBUTYL KETONE Formal Toxicity Summary for METHYL ISOBUTYL KETONE NOTE: Although the toxicity values presented in these toxicity profiles were correct at the time they were produced, these values are subject to change. Users should always refer to the Toxicity Value Database for the current toxicity values. EXECUTIVE SUMMARY 1. INTRODUCTION 2. METABOLISM AND DISPOSITION 2.1 ABSORPTION 2.2 DISTRIBUTION 2.3 METABOLISM 2.4 EXCRETION 3. NONCARCINOGENIC HEALTH EFFECTS 3.1 ORAL EXPOSURES 3.2 INHALATION EXPOSURES 3.3 OTHER ROUTES OF EXPOSURE 3.4 TARGET ORGANS/CRITICAL EFFECTS 4. CARCINOGENICITY 4.1 ORAL EXPOSURES 4.2 INHALATION EXPOSURES 4.3 OTHER ROUTES OF EXPOSURE 4.4 EPA WEIGHT-OF-EVIDENCE 4.5 CARCINOGENICITY SLOPE FACTORS 5. REFERENCES July 1995 Prepared by Rosmarie A. Faust, Ph.D., Chemical Hazard Evaluation and

15

Characterization Of The Local Electrical Environment In An Electrically-guided Protein Patterning System Incorporating Antifouling Self-assembled Monolayer  

E-Print Network (OSTI)

Infrared Spectroscopy GMPCPP Guanosine-5?-[(?,?)-methyleno]triphosphate MIBK Methyl Isobutyl Ketone MPEOPS 2-[methoxypoly-(ethyleneoxy)propyl]-trimethoxysilane MT Microtubule PEG-SAM Poly(ethylene glycol) Self Assembled Monolayer PMMA Poly... in acetone for five minutes, followed by rinsing with acetone and isopropanol and drying with nitrogen gas. After the cleaned silicon wafers were placed on a hot plate at 200 ?C for complete drying, a few drops of electon-beam resist (PMMA (poly...

Park, Jinseon

2011-10-21T23:59:59.000Z

16

Oxidation of ketone groups in transported biomass burning aerosol from the 2008 Northern California Lightning Series fires  

E-Print Network (OSTI)

, Ketone, Biomass burning, Fossil fuel combustion 1. Introduction Globally the two largest sources of primary organic aerosol are fossil fuel combustion (2-28 Tg C yr-1 ) and biomass burning (31-45 Tg C yr-1Oxidation of ketone groups in transported biomass burning aerosol from the 2008 Northern California

Russell, Lynn

17

Oxidation of ketone groups in transported biomass burning aerosol from the 2008 Northern California Lightning Series fires  

E-Print Network (OSTI)

., 2000), making SOA from fossil fuel combustion, biogenic, and biomass burning emissions a potentiallyOxidation of ketone groups in transported biomass burning aerosol from the 2008 Northern California in revised form 20 July 2010 Accepted 21 July 2010 Keywords: Organic carbon particles Ketone Biomass burning

Russell, Lynn

18

Reactivity of a Well-Characterized Titananorbornadiene (?6-Arene) Complex with Ketones and Aldehydes  

Science Journals Connector (OSTI)

The reaction between the titananorbornadiene complex [(DMSC)Ti(?6-1,2,4-(Me3Si)3C6H3)] (2; DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene dianion) and ketones or aldehydes proceeds by insertion of a ketone or aldehyde molecule into a Ti?C bond of 2, yielding 2,5-dioxatitanacyclopentane or 2-oxatitanacycloheptene compounds. ... The reaction between the titananorbornadiene complex [(DMSC)Ti(?6-1,2,4-(Me3Si)3C6H3)] (2) and ketones or aldehydes proceeds by insertion of a ketone or aldehyde molecule into a Ti?C bond of 2, yielding 2,5-dioxatitanacyclopentane or 2-oxatitanacycloheptene compounds. ... 29-31 Previously, we reported that reduction of (DMSC)TiCl2 (1; DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene)32 with activated Mg in the presence of Me3SiC?CH led to isolation of the titananorbornadiene (?6-arene) complex [(DMSC)Ti(1,2,4-(Me3Si)3C6H3)] (2), which was fully characterized including by X-ray crystallography. ...

Oleg V. Ozerov; Sean Parkin; Carolyn P. Brock; Folami T. Ladipo

2000-09-13T23:59:59.000Z

19

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

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

20

Unusual Reductive Coupling of Alkynes and Ketones:? Reactivity of Titanacycles Supported by Dimethylsilylcalix[4]arene (DMSC) Ligands  

Science Journals Connector (OSTI)

Unusual Reductive Coupling of Alkynes and Ketones:? Reactivity of Titanacycles Supported by Dimethylsilylcalix[4]arene (DMSC) Ligands ... [(DMSC)Ti{1,2,4-(Me3Si)3C6H3}] (1) mediates an unusual coupling of terminal alkynes with ketones to produce 2,7-dioxa-1-titana-4-cycloheptenes. ... The regioselectivity of the reaction is controlled by the DMSC ligand, which enforces exo-orientation of the alkyne non-H substituent in the putative intermediate (DMSC)Ti(?2-alkyne) species. ...

Oleg V. Ozerov; Carolyn P. Brock; Shana D. Carr; Folami T. Ladipo

2000-10-12T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Controlling DNA Methylation  

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

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

22

Properties Investigation of Sulfonated Poly(ether ether ketone)/Polyacrylonitrile Acid–Base Blend Membrane for Vanadium Redox Flow Battery Application  

Science Journals Connector (OSTI)

Acid–base blend membrane prepared from sulfonated poly(ether ether ketone) (SPEEK) and polyacrylonitrile (PAN) was detailedly evaluated for vanadium redox flow battery (VRFB) application. SPEEK/PAN blend membrane exhibited dense and homogeneous cross-...

Zhaohua Li; Wenjing Dai; Lihong Yu; Le Liu; Jingyu Xi; Xinping Qiu; Liquan Chen

2014-10-15T23:59:59.000Z

23

Nucleophilic substitution of ?-halo-ketones. XXIII. Acetolysis of 1-chloro-3-phenoxy-1-phenylthio-2-propanones. An intramolecular trans-acetylation involving phenoxide anion as the leaving group  

Science Journals Connector (OSTI)

The acetolyses of ?-chloro-ketones1a-c,2a-c,9a and11a have been investigated parallely. Several aspects of the mechanisms involved in chlorine normal and cine substitution have been elucidated. Intramolecular trans-acetylation, ultimately leading to fragmentation of acetoxy-ketones3b,4a and4c, have been postulated to account for the formation of thiol ester6, aldehyde5a and ketone5c, respectively.

Alba Pusino; Antonio Saba; Vittorio Rosnati

1984-01-01T23:59:59.000Z

24

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

SciTech Connect

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

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

2010-01-22T23:59:59.000Z

25

Part I. A Comparison of Three Different High Pressure Liquid Chromatography Systems for the Determination of Aldehydes and Ketones in Diesel Exhaust  

Science Journals Connector (OSTI)

......aldehydes and ketones in diesel exhaust to be a solvent...measured for a 75 wt% diesel/25 wt% Tergitol 15-S-7...reported in reference 8. In general, it was found that the...the base fuel (No. 2 diesel), aldehyde emissions...different days, with the engine and sampling conditions......

G. Creech; R.T. Johnson; J.O. Stoffer

1982-02-01T23:59:59.000Z

26

Reductive Coupling of [(RO)2Ti(L2)2] Complexes Containing a Chelating Bis(aryloxide) Ligand with Ketones (L2 = bpy, dmbpy, or phen)  

Science Journals Connector (OSTI)

[(RO)2Ti(L2)2] complexes {(RO)2 = DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene dianion, or MBMP = 2,2‘-methylenebis(6-tert-butyl-4-methylphenol) dianion; L2 = bpy, dmbpy, or phen} react with aromatic ketones in a reversible manner to afford Ti-?2-ketone complexes [(RO)2Ti(?2-OCArR)(L2)] (Ar = aryl, while R = aryl or alkyl), which undergo further reaction with ketone to give the corresponding 2-aza-5-oxa-titanacyclopentene. ... The reactivity of [(RO)2Ti(L2)2] complexes (L2 = bpy, dmbpy, or phen; (RO)2 = DMSC or MBMP) with ketones was investigated (DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene dianion; MBMP = 2,2‘-methylenebis(6-tert-butyl-4-methylphenol) dianion). ... The molecular structures of [(DMSC)Ti(bpy)2] (6a) and [(DMSC)Ti(bpy)2] (7a) were characterized by X-ray crystallography. ...

David Owiny; Jesudoss V. Kingston; Marc Maynor; Sean Parkin; Jeff W. Kampf; Folami T. Ladipo

2005-07-06T23:59:59.000Z

27

Palladium-Catalyzed Asymmetric Alkylation in the Synthesis of Cyclopentanoid and Cycloheptanoid Core Structures Bearing All-  

E-Print Network (OSTI)

, iodoethane, acrylonitrile, methyl vinyl ketone, and acrolein were distilled prior to use. Purified water

Stoltz, Brian M.

28

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

SciTech Connect

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

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

1999-05-05T23:59:59.000Z

29

Effect of salinity on methylation of mercury  

SciTech Connect

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

Blum, J.E.; Bartha, R.

1980-09-01T23:59:59.000Z

30

Kinetic measurements of the gas-phase reactions of OH radicals with hydroxy ethers, hydroxy ketones, and keto ethers  

SciTech Connect

Absolute rate constants were determined for the gas-phase reactions of hydroxyl radicals with a series of hydroxy ethers as well as the simplest hydroxy ketone and keto ether with use of the flash photolysis resonance fluorescence technique. At 298 K, the measured rate constants were as follows (in units of 10{sup {minus}12} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}): 2-methoxyethanol, 12.5 {plus minus} 0.7; 2-ethoxyethanol, 18.7 {plus minus} 2.0; 2-butoxyethanol, 23.1 {plus minus} 0.9; 3-ethoxy-1-propanol, 22.0 {plus minus} 1.3; 3-methoxy-l-butanol, 23.6 {plus minus} 1.6; acetol, 3.0 {plus minus} 0.3; and methoxyacetone, 6.8 {plus minus} 0.6. The kinetic data for 2-methoxyethanol obtained between 240 and 440 K were used to derive the following Arrhenius expression: k{sub 1} = (4.5 {plus minus} 1.4) {times} 10{sup {minus}12} exp((325 {plus minus} 100)/T) (cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}). The results for all seven reactants are discussed in terms of the prediction of OH rate constants for oxygenated organic compounds.

Dagaut, P.; Liu, R.; Wallington, T.J.; Kurylo, M.J. (National Institute of Standards and Technology, Gaithersburg, MD (USA))

1989-11-16T23:59:59.000Z

31

Accelerated Degradation of Methyl Iodide by Agrochemicals  

Science Journals Connector (OSTI)

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

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

2003-01-01T23:59:59.000Z

32

Low temperature synthesis of methyl formate  

DOE Patents (OSTI)

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

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

1986-01-01T23:59:59.000Z

33

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

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

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

34

Production of methyl tert-alkyl ethers  

SciTech Connect

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

Trofimov, V.A.

1995-01-01T23:59:59.000Z

35

Evaluation of thermodynamic properties of fluid mixtures by PC-SAFT model  

Science Journals Connector (OSTI)

Abstract Densities and viscosities of binary mixtures of methyl isobutyl ketone (MIK) with polar solvents namely, 2-propanol, 2-butanol and 2-pentanol, were measured at 7 temperatures (293.15–323.15 K) over the entire range of composition. Using the experimental data, excess molar volumes V m E , isobaric thermal expansivity ? p , partial molar volumes V Ż m , i and viscosity deviations ? ? , have been calculated due to their importance in the study of specific molecular interactions. The observed negative and positive values of deviation/excess parameters were explained on the basis of the intermolecular interactions occur in these mixtures. The Perturbed Chain Statistical Association Fluid Theory (PC-SAFT) has been used to correlate the volumetric behavior of the mixtures.

Mohammad Almasi

2014-01-01T23:59:59.000Z

36

Mercury methylation in periphyton of the Florida Everglades  

Science Journals Connector (OSTI)

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

37

A review on environmental factors regulating arsenic methylation in humans  

SciTech Connect

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

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

2009-03-15T23:59:59.000Z

38

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

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

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

39

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

DOE Patents (OSTI)

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

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

2011-07-26T23:59:59.000Z

40

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

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

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

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

Science Journals Connector (OSTI)

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

Jon D. Snyder; James G. Leesch

2001-05-24T23:59:59.000Z

42

Control of mercury methylation in wetlands through iron addition  

E-Print Network (OSTI)

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

Sedlak, David L; Ulrich, Patrick D

2009-01-01T23:59:59.000Z

43

Methyl bromide emissions to the atmosphere from temperate woodland ecosystems   

E-Print Network (OSTI)

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

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

2008-01-01T23:59:59.000Z

44

The Genetics of de novo Methylation in Arabidopsis thaliana  

E-Print Network (OSTI)

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

Greenberg, Maxim Van Cleef

2012-01-01T23:59:59.000Z

45

Graft polymerization of methyl methacrylate onto short leather fibers  

Science Journals Connector (OSTI)

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

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

1999-03-01T23:59:59.000Z

46

The synthesis of some N-methylated aminoalkylphosphonic acids  

E-Print Network (OSTI)

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

Eikenberry, Jon Nathan

1966-01-01T23:59:59.000Z

47

Comment on flash photolysis resonance fluorescence investigation of the gas-phase reactions of OH radicals with a series of aliphatic ketones over the temperature range 240-440 K  

SciTech Connect

The recent flash photolysis-resonance fluorescence study of Wallington and Kurylo dealing with the kinetics of the gas-phase reactions of the OH radical with ketones has greatly expanded the literature data base concerning this class of organic compounds. For 2- and 3-pentanone and 2-hexanone the absolute room temperature rate constants determined by Wallington and Kurylo can be compared to rate constants obtained by using a relative rate technique, and significant discrepancies, outside of the combined stated experimental error limits, are evident. The relative rate constant measurements were carried out in a 60-L Teflon chamber, and problems ascribed to first-order wall losses of the ketones during the irradiations were observed.

Atkinson, R.; Aschmann, S.M.

1988-06-30T23:59:59.000Z

48

Flash photolysis resonance fluorescence investigation of the gas-phase reactions of OH radicals with a series of aliphatic ketones over the temperature range 240-440 K  

SciTech Connect

Absolute rate constants have been determined for the gas-phase reactions of OH radicals with a series of aliphatic ketones by the flash photolysis resonance fluorescence measurement technique. Experiments were performed over the temperature range 240-440 K at total pressures (using Ar diluent gas) between 25 and 50 Torr. The rate constant data for acetone (k/sub 1/), 2-butanone (k/sub 2/), and 3-pentanone (k/sub 3/) were used to derive the Arrhenius expressions k/sub 1/ = (1.7 +/- 0.4) x 10/sup -12/ exp(-(600 +/- 75)/T) cm/sup 3/ molecule/sup -1/ s/sup -1/, k/sub 2/ = (2.3 +/- 1.1) x 10/sup -12/ exp(-170 +/- 120)/T) cm/sup 3/ molecule/sup -1/ s/sup -1/, and k/sub 3/ = (2.8 +/- 0.3) x 10/sup -12/ exp(10 +/- 35)/T) cm/sup 3/ molecule/sup -1/ s/sup -1/. At 296 K, the measured rate constants (in units of 10/sup -13/ cm/sup 3/ molecule/sup -1/ s/sup -1/) were k/sub 1/ = 2.16 +/- 0.16, k/sub 2/ = 11.5 +/- 1.0, and k/sub 3/ = 27.4 +/- 1.3. Room temperature rate constants for the reaction of OH radicals with a number of other 2-ketones were also determined. These were (in the above units) 3,3-dimethyl-2-butanone (12.1 +/- 0.5), 2-pentanone (40.0 +/- 2.9), 2-hexanone (66.4 +/- 5.6), 2-heptanone (86.7 +/- 8.4reverse arrow, 2-octanone (110 +/- 9), 2-nonanone (122 +/- 13), and 2-decanone (132 +/- 12). The error limits represent 2 standard deviations (from the least-squares analysis); the authors estimate that an additional 5% uncertainty should be added to account for possible systematic error in the measurements. These results are discussed in terms of reactivity trends for C-H bonds located in the ..cap alpha.., ..beta.., and ..gamma.. positions with respect to the carbonyl group.

Wallington, T.J.; Kurylo, M.J.

1987-09-10T23:59:59.000Z

49

Neutron scattering investigations on methyl group dynamics in polymers.  

E-Print Network (OSTI)

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

Juan Colmenero; Angel J. Moreno; Angel Alegría

2005-01-01T23:59:59.000Z

50

Nested methylation-specific polymerase chain reaction cancer detection method  

DOE Patents (OSTI)

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

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

2007-05-08T23:59:59.000Z

51

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

Science Journals Connector (OSTI)

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

Kapustin, E.A.

2014-05-31T23:59:59.000Z

52

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

E-Print Network (OSTI)

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

Giguzinsky, Orit

2014-01-01T23:59:59.000Z

53

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

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

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

54

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

Science Journals Connector (OSTI)

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

Sajad Abdolvand; Sahar Kayedinejad Esfahani…

2014-09-01T23:59:59.000Z

55

Cyclic chronopotentiometric studies of the LiAl anode in methyl acetate  

Science Journals Connector (OSTI)

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

Y. S. Fung; H. C. Lai

1989-03-01T23:59:59.000Z

56

Mercury Methylation by Planktonic and Biofilm Cultures of Desulfovibrio desulfuricans  

Science Journals Connector (OSTI)

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

Chu-Ching Lin; Jennifer A. Jay

2007-09-01T23:59:59.000Z

57

Ultrafast photochemistry of methyl hydroperoxide on ice particles  

E-Print Network (OSTI)

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

Nizkorodov, Sergey

58

Phase 1 Methyl Iodide Deep-Bed Adsorption Tests  

SciTech Connect

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

Nick Soelberg; Tony Watson

2014-08-01T23:59:59.000Z

59

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

Science Journals Connector (OSTI)

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

Szabolcs Vass; Kristina Haimer; Gerhard Meier…

2002-03-01T23:59:59.000Z

60

Global methylation responses to low dose radiation exposure  

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

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

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Laser induced fluorescence spectra and carbonyl wagging potential energy functions for the S1(n,?*) excited states of tetrahydrofuran-3-one and tetrahydrothiophen-3-one: Correlation between inversion barrier and angle strain for cyclic ketones  

Science Journals Connector (OSTI)

The jet-cooled fluorescence excitation spectra of the S1(n ?*) states of tetrahydrofuran-3-one CH 2 OCH 2 CH 2 C Ż =O and tetrahydrothiophen-3-one CH 2 SCH 2 CH 2 C Ż =O have been recorded and analyzed. The carbonyl inversion bands which arise from double-minimum potential energy functions in the excited states were fit with functions of the form V=ax4?bx2 or V=cx2+d?exp(?fx 2). The furanone was found to have an inversion barrier in the S1(n ?*) state of 1152 cm?1 (13.8 kJ/mol) while the thiophenone has a barrier of 659 cm?1 (7.9 kJ/mol). The two molecules have their potential energy minima for the S1(n ?*) state at carbonyl wagging angles of 26° and 20° respectively. The results here together with previous data for several other cyclic ketones demonstrate that the inversion barrier increases with the ring angle strain at the ketone carbon atom.

Paul A. Sagear; S. N. Lee; Jaan Laane

1997-01-01T23:59:59.000Z

62

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

Science Journals Connector (OSTI)

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

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

2003-12-06T23:59:59.000Z

63

Role of methyl nitrate in plasma exhaust treatment  

SciTech Connect

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

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

1999-10-01T23:59:59.000Z

64

"Seeing" Mercury Methylation in Progress  

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

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

65

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

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

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

66

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

SciTech Connect

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

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

2010-01-01T23:59:59.000Z

67

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

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

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

68

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

E-Print Network (OSTI)

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

Sun, Hongyan

2000-01-01T23:59:59.000Z

69

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

Science Journals Connector (OSTI)

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

A. Heidemann; J. Eckert; L. Passell…

1987-01-01T23:59:59.000Z

70

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

Science Journals Connector (OSTI)

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

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

1989-01-01T23:59:59.000Z

71

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

E-Print Network (OSTI)

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

Kolaei, Alireza Rezania

72

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

E-Print Network (OSTI)

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

Morel, François M. M.

73

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

SciTech Connect

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

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

2011-01-01T23:59:59.000Z

74

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

SciTech Connect

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

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

2012-01-01T23:59:59.000Z

75

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

E-Print Network (OSTI)

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

Boyer, Edmond

76

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

E-Print Network (OSTI)

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

Wang, Hsin-Min

77

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

E-Print Network (OSTI)

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

Hertel, Klemens J.

78

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

Science Journals Connector (OSTI)

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

Tom Mayo; Gabriele Schweikert; Guido Sanguinetti

2014-11-01T23:59:59.000Z

79

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

E-Print Network (OSTI)

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

Sparks, Donald L.

80

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

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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 JOURNAL OF CHEMICAL PHYSICS 138, 054301 (2013) Photodissociation dynamics of the methyl perthiyl radical at 248 nm  

E-Print Network (OSTI)

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

Neumark, Daniel M.

82

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

E-Print Network (OSTI)

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

83

Methyl-CpG island-associated genome signature tags  

DOE Patents (OSTI)

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

Dunn, John J

2014-05-20T23:59:59.000Z

84

High Temperature Chemical Kinetic Combustion Modeling of Lightly Methylated Alkanes  

SciTech Connect

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

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

2011-03-01T23:59:59.000Z

85

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

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

86

E-Print Network 3.0 - asymmetric hetero-diels-alder reactions...  

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

Correction Paper No. b927076k Summary: . The classic hetero-Diels Alder reaction of acrolein with methyl vinyl ketone (Scheme 3) was examined in great... is unsymmetrically...

87

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

E-Print Network (OSTI)

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

Schliesing, Laura Jo

1990-01-01T23:59:59.000Z

88

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

E-Print Network (OSTI)

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

Diaz Casas, Adriana Z.

2005-11-01T23:59:59.000Z

89

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

Science Journals Connector (OSTI)

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

Lourdes Jachero; Betsabet Sepúlveda; Inés Ahumada…

2013-09-01T23:59:59.000Z

90

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

E-Print Network (OSTI)

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

Glanville, Yvonne

2005-01-01T23:59:59.000Z

91

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

Science Journals Connector (OSTI)

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

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

2003-12-15T23:59:59.000Z

92

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

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

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

93

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

Science Journals Connector (OSTI)

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

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

1987-01-01T23:59:59.000Z

94

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

E-Print Network (OSTI)

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

Pangallo, Kristin C

2009-01-01T23:59:59.000Z

95

Novel syngas-based process for methyl methacrylate  

SciTech Connect

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

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

1996-12-31T23:59:59.000Z

96

Methods for collection and analysis of geopressured geothermal and oil field waters  

SciTech Connect

Present methods are described for the collection, preservation, and chemical analysis of waters produced from geopressured geothermal and petroleum wells. Detailed procedures for collection include precautions and equipment necessary to ensure that the sample is representative of the water produced. Procedures for sample preservation include filtration, acidification, dilution for silica, methyl isobutyl ketone (MIBK) extraction of aluminum, addition of potassium permanganate to preserve mercury, and precipitation of carbonate species as strontium carbonate for stable carbon isotopes and total dissolved carbonate analysis. Characteristics determined at the well site are sulfide, pH, ammonia, and conductivity. Laboratory procedures are given for the analysis of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, iron, manganese, zinc, lead, aluminum, and mercury by atomic absorption and flame emission spectroscopy. Chloride is determined by silver nitrate titration and fluoride by ion-specific electrode. Bromide and iodide concentrations are determined by the hypochlorite oxidation method. Sulfate is analyzed by titration using barium chloride with thorin indicator after pretreatment with alumina. Boron and silica are determined colorimetrically by the carmine and molybdate-blue methods, respectively. Aliphatic acid anions (C/sub 2/ through C/sub 5/) are determined by gas chromatography after separation and concentration in a chloroform-butanol mixture.

Lico, M.S.; Kharaka, Y.K.; Carothers, W.W.; Wright, V.A.

1982-01-01T23:59:59.000Z

97

Isolation of levoglucosan from pyrolysis oil derived from cellulose  

DOE Patents (OSTI)

High purity levoglucosan is obtained from pyrolysis oil derived from cellulose by: mixing pyrolysis oil with water and a basic metal hydroxide, oxide, or salt in amount sufficient to elevate pH values to a range of from about 12 to about 12.5, and adding an amount of the hydroxide, oxide, or salt in excess of the amount needed to obtain the pH range until colored materials of impurities from the oil are removed and a slurry is formed; drying the slurry azeotropically with methyl isobutyl ketone solvent to form a residue, and further drying the residue by evaporation; reducing the residue into a powder; continuously extracting the powder residue with ethyl acetate to provide a levoglucosan-rich extract; and concentrating the extract by removing ethyl acetate to provide crystalline levoglucosan. Preferably, Ca(OH)[sub 2] is added to adjust the pH to the elevated values, and then Ca(OH)[sub 2] is added in an excess amount needed. 3 figures.

Moens, L.

1994-12-06T23:59:59.000Z

98

Isolation of levoglucosan from lignocellulosic pyrolysis oil derived from wood or waste newsprint  

DOE Patents (OSTI)

A method is provided for preparing high purity levoglucosan from lignocellulosic pyrolysis oils derived from wood or waste newsprint. The method includes reducing wood or newsprint to fine particle sizes, treating the particles with a hot mineral acid for a predetermined period of time, and filtering off and drying resulting solid wood or newsprint material; pyrolyzing the dried solid wood or newsprint material at temperatures between about 350 and 375 C to produce pyrolysis oils; treating the oils to liquid-liquid extraction with methyl isobutyl ketone to remove heavy tar materials from the oils, and to provide an aqueous fraction mixture of the oils containing primarily levoglucosan; treating the aqueous fraction mixtures with a basic metal salt in an amount sufficient to elevate pH values to a range of about 12 to about 12.5 and adding an amount of the salt in excess of the amount needed to obtain the pH range to remove colored materials of impurities from the oil and form a slurry, and freeze-drying the resulting slurry to produce a dry solid residue; and extracting the levoglucosan from the residue using ethyl acetate solvent to produce a purified crystalline levoglucosan. 2 figs.

Moens, L.

1995-07-11T23:59:59.000Z

99

Analysis and storage of samples for chromium determination in seawater  

Science Journals Connector (OSTI)

An improved method for determination of chromium in seawater has been developed. The procedure is based on the ion-pair extraction of Cr(VI) with tricaprylmethyl ammonium chloride (Aliquat-336) into methyl isobutyl ketone (MIBK). The extract is analyzed by Graphite Furnace Atomic Absorption Spectrophotometry (GFAAS). The possibility to determine total chromium by oxidation of Cr(III) is also shown. Different ways for storage of natural seawater samples in order to avoid speciation changes were also investigated. Coastal seawater could be stored at least one month at natural pH and at room temperature. Cr(VI) in frozen oceanic water is stable for at least eight months. The method allows rapid determination of Cr(VI). Measurements on CASS-2 reference material gave a Cr(VI) concentration of 2.76 ± 0.09 nM (n = 6), compared to the certificated value 2.32 ± 0.40 nM. The detection limit based on 3? of the blank is 0.1 nM. The determination of total chromium is more time-consuming and has a slightly lower precision.

Waraporn Sirinawin; Stig Westerlund

1997-01-01T23:59:59.000Z

100

Isolation of levoglucosan from lignocellulosic pyrolysis oil derived from wood or waste newsprint  

DOE Patents (OSTI)

A method is provided for preparing high purity levoglucosan from lignocellulosic pyrolysis oils derived from wood or waste newsprint. The method includes reducing wood or newsprint to fine particle sizes, treating the particles with a hot mineral acid for a predetermined period of time, and filtering off and drying resulting solid wood or newsprint material; pyrolyzing the dried solid wood or newsprint material at temperatures between about 350.degree. and 375.degree. C. to produce pyrolysis oils; treating the oils to liquid-liquid extraction with methyl isobutyl ketone to remove heavy tar materials from the oils, and to provide an aqueous fraction mixture of the oils containing primarily levoglucosan; treating the aqueous fraction mixtures with a basic metal salt in an amount sufficient to elevate pH values to a range of about 12 to about 12.5 and adding an amount of the salt in excess of the amount needed to obtain the pH range to remove colored materials of impurities from the oil and form a slurry, and freeze-drying the resulting slurry to produce a dry solid residue; and extracting the levoglucosan from the residue using ethyl acetate solvent to produce a purified crystalline levoglucosan.

Moens, Luc (Lakewood, CO)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

DOE Patents (OSTI)

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

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

2014-08-05T23:59:59.000Z

102

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

DOE Patents (OSTI)

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

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

2014-08-12T23:59:59.000Z

103

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

104

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

SciTech Connect

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

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

2008-01-09T23:59:59.000Z

105

Behavior of 3-Isobutyl-2-hydroxypyrazine (IBHP), a Key Intermediate in 3-Isobutyl-2-methoxypyrazine (IBMP) Metabolism, in Ripening Wine Grapes  

Science Journals Connector (OSTI)

The TOF-MS was operated in EI mode, with an ionization energy of ?70 eV. ... Kaye, Constellation Brands, personal communication). ...

Sarah A. Harris; Imelda Ryona; Gavin L. Sacks

2012-11-19T23:59:59.000Z

106

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

SciTech Connect

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

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

1990-12-01T23:59:59.000Z

107

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

E-Print Network (OSTI)

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

108

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

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

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

109

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

Science Journals Connector (OSTI)

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

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

2013-01-01T23:59:59.000Z

110

Electron stimulated reactions of methyl iodide coadsorbed with amorphous solid water  

SciTech Connect

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

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

2007-05-28T23:59:59.000Z

111

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

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

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

112

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

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

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

113

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

Science Journals Connector (OSTI)

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

M. Saravanan; A. Anbarasu; M. Loganathan

2013-01-01T23:59:59.000Z

114

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

SciTech Connect

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

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

2012-11-15T23:59:59.000Z

115

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

E-Print Network (OSTI)

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

Jupe, Eldon Ralph

2012-06-07T23:59:59.000Z

116

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

Science Journals Connector (OSTI)

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

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

2011-03-10T23:59:59.000Z

117

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

SciTech Connect

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

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

2005-10-16T23:59:59.000Z

118

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

Science Journals Connector (OSTI)

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

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

2011-05-16T23:59:59.000Z

119

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

Science Journals Connector (OSTI)

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

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

2014-10-01T23:59:59.000Z

120

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

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

Science Journals Connector (OSTI)

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

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

2004-07-01T23:59:59.000Z

122

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

Science Journals Connector (OSTI)

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

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

2014-08-08T23:59:59.000Z

123

Synthesis of Signals for De Novo DNA Methylation in Neurospora crassa  

Science Journals Connector (OSTI)

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

Hisashi Tamaru; Eric U. Selker

2003-04-01T23:59:59.000Z

124

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

E-Print Network (OSTI)

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

125

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

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

126

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

Science Journals Connector (OSTI)

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

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

1990-11-01T23:59:59.000Z

127

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

Science Journals Connector (OSTI)

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

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

2010-01-01T23:59:59.000Z

128

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

129

Experimental and modeling study of the thermal decomposition of methyl decanoate  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

130

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

E-Print Network (OSTI)

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

Ordal, George W.

131

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

E-Print Network (OSTI)

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

132

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

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

133

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

SciTech Connect

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

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

1993-12-01T23:59:59.000Z

134

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

135

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

Science Journals Connector (OSTI)

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

Ryo Yamauchi; Norio Yamamoto; Koji Kato

1995-05-01T23:59:59.000Z

136

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

Science Journals Connector (OSTI)

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

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

2009-02-16T23:59:59.000Z

137

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

Science Journals Connector (OSTI)

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

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

2001-12-01T23:59:59.000Z

138

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

E-Print Network (OSTI)

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

139

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

Science Journals Connector (OSTI)

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

Marinella Farré; Daniela Asperger; Lina Kantiani…

2008-04-01T23:59:59.000Z

140

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

Science Journals Connector (OSTI)

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

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

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

Science Journals Connector (OSTI)

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

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

1984-01-01T23:59:59.000Z

142

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

Science Journals Connector (OSTI)

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

Y. S. Fung; H. C. Lai

1992-03-01T23:59:59.000Z

143

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

Science Journals Connector (OSTI)

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

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

2014-10-01T23:59:59.000Z

144

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

E-Print Network (OSTI)

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

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

2011-08-04T23:59:59.000Z

145

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

Science Journals Connector (OSTI)

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

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

2004-01-08T23:59:59.000Z

146

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

Science Journals Connector (OSTI)

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

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

2005-05-01T23:59:59.000Z

147

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

SciTech Connect

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

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

1995-12-31T23:59:59.000Z

148

Electrochemical properties of lithium hexafluoroarsenate in methyl acetate at various temperatures  

Science Journals Connector (OSTI)

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

Elena Yu. Tyunina; Marina D. Chekunova

2013-01-01T23:59:59.000Z

149

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

SciTech Connect

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

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

2007-01-15T23:59:59.000Z

150

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

Science Journals Connector (OSTI)

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

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

2001-11-01T23:59:59.000Z

151

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

Science Journals Connector (OSTI)

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

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

2014-03-07T23:59:59.000Z

152

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

Science Journals Connector (OSTI)

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

Lieve M.L. Laurens

2015-01-01T23:59:59.000Z

153

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

SciTech Connect

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

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

1993-10-01T23:59:59.000Z

154

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

SciTech Connect

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

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

1996-05-01T23:59:59.000Z

155

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

SciTech Connect

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

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

2012-01-01T23:59:59.000Z

156

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

E-Print Network (OSTI)

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

Gao, Song

157

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

E-Print Network (OSTI)

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

Turitsyn, Sergei K.

158

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

Science Journals Connector (OSTI)

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

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

159

Carbon-Catalyzed Gasification of Organic Feedstocks in Supercritical Water  

Science Journals Connector (OSTI)

Feedstocks studied in this paper include glycerol, glucose, cellobiose, whole biomass feedstocks (depithed bagasse liquid extract and sewage sludge), and representative Department of Defense (DoD) wastes (methanol, methyl ethyl ketone, ethylene glycol, acetic acid, and phenol). ...

Xiaodong Xu; Yukihiko Matsumura; Jonny Stenberg; Michael Jerry Antal, Jr.

1996-08-08T23:59:59.000Z

160

Green chemistry : dense carbon dioxide and water as environmentally benign reaction media  

E-Print Network (OSTI)

(cont.) was investigated in scCO?, and the cycloaddition between cyclopentadiene and methyl vinyl ketone (MVK) was studied in an scCO?/liquid water environment. Nitrogen chemistry, specifically the synthesis of nitrogen ...

Allen, Andrew J. (Andrew John), 1978-

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

162

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

Science Journals Connector (OSTI)

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

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

2004-07-01T23:59:59.000Z

163

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

Science Journals Connector (OSTI)

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

Tarun Kumar Misra; Chittaranjan Sinha

1999-04-01T23:59:59.000Z

164

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

E-Print Network (OSTI)

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

Boyer, Edmond

165

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

Science Journals Connector (OSTI)

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

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

2013-05-13T23:59:59.000Z

166

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

Science Journals Connector (OSTI)

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

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

2013-08-14T23:59:59.000Z

167

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

Science Journals Connector (OSTI)

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

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

2014-10-01T23:59:59.000Z

168

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

E-Print Network (OSTI)

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

Bradford, Kent

169

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

E-Print Network (OSTI)

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

Schlegel, H. Bernhard

170

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

SciTech Connect

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

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

2013-01-21T23:59:59.000Z

171

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

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

172

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

SciTech Connect

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

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

2012-09-15T23:59:59.000Z

173

Heterogeneous catalyst for the production of acetic anhydride from methyl acetate  

DOE Patents (OSTI)

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

Ramprasad, D.; Waller, F.J.

1999-04-06T23:59:59.000Z

174

Heterogeneous catalyst for the production of acetic anhydride from methyl acetate  

DOE Patents (OSTI)

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

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

1999-01-01T23:59:59.000Z

175

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

SciTech Connect

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

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

1989-08-01T23:59:59.000Z

176

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

Science Journals Connector (OSTI)

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

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

2013-01-01T23:59:59.000Z

177

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

Science Journals Connector (OSTI)

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

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

2003-10-02T23:59:59.000Z

178

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

Science Journals Connector (OSTI)

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

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

2011-01-01T23:59:59.000Z

179

Embedded Piezoresistive Microcantilever Sensors Functionalized for the Detection of Methyl Salicylate  

SciTech Connect

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

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

2013-03-01T23:59:59.000Z

180

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

SciTech Connect

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

Yongchun Tang; John (Qisheng) Ma

2012-03-23T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

182

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

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

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

183

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

Science Journals Connector (OSTI)

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

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

1996-01-01T23:59:59.000Z

184

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

E-Print Network (OSTI)

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

Coogan, Melinda Ann

2007-01-01T23:59:59.000Z

185

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

Science Journals Connector (OSTI)

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

Kaori Ishida; Shiho Matsuda; Masaru Watanabe…

2014-12-01T23:59:59.000Z

186

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

Science Journals Connector (OSTI)

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

Mahdi Abdollahi; Mohammad Ali Semsarzadeh

2012-04-01T23:59:59.000Z

187

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

Science Journals Connector (OSTI)

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

Abdolah Raeisi Sarasiab; Mehdi Hosseini

2014-06-01T23:59:59.000Z

188

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

E-Print Network (OSTI)

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

Rotavera, Brandon Michael

2012-07-16T23:59:59.000Z

189

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

SciTech Connect

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

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

1986-07-01T23:59:59.000Z

190

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

SciTech Connect

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

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

2010-08-01T23:59:59.000Z

191

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

Science Journals Connector (OSTI)

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

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

2006-01-01T23:59:59.000Z

192

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

SciTech Connect

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

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

1990-04-01T23:59:59.000Z

193

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

Science Journals Connector (OSTI)

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

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

2015-01-01T23:59:59.000Z

194

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

SciTech Connect

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

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

2009-05-03T23:59:59.000Z

195

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

SciTech Connect

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

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

2013-04-15T23:59:59.000Z

196

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

E-Print Network (OSTI)

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

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

2011-06-29T23:59:59.000Z

197

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

Science Journals Connector (OSTI)

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

Helmut Muenstedt; Nikolaos Katsikis; Joachim Kaschta

2008-11-21T23:59:59.000Z

198

PEMFC cathode catalyst contamination evaluation with a RRDE-methyl methacrylate  

Science Journals Connector (OSTI)

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

Junjie Ge; Jean St-Pierre; Yunfeng Zhai

2014-01-01T23:59:59.000Z

199

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

SciTech Connect

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

Spataru, A.; Romig, C.

1995-12-31T23:59:59.000Z

200

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

SciTech Connect

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

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

1995-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

Science Journals Connector (OSTI)

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

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

1979-01-01T23:59:59.000Z

202

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

Science Journals Connector (OSTI)

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

2014-01-01T23:59:59.000Z

203

List of Reproductive Toxins and Highly Acute Toxic Materials  

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

Reproductive Toxins and Highly Acute Toxic Materials Reproductive Toxins and Highly Acute Toxic Materials Reproductive Toxins Acrylonitr ile Aniline Arsenic and its compounds Benzene Benzo(a)pyrene Beryllium Boric acid (Boron) Cadmium and its compounds Carbon monoxide Chlordecone (Kepone) Chloroform Chloroprene Dibromochloropropane (DBCP) Dichlorobenzene 1,1-Dichloroethane Dichloromethane Dioxane Epichlorohydrin Ethylene Dibromide Ethylene Dichloride Ethylene Oxide Fluorocarbons Formaldehyde Formamides Lead (Organic) Manganese and its compounds Mercury and its compounds (Inorganic) Methyl n-butyl ketone Methyl chloroform Methyl ethyl ketone (MEK) Nitrogen Dioxide Ozone Platinum and its compounds Polybrominated biphenyls (PBB) Polychlorinated bipenyls (PCB) Selenium and its compounds Styrene Tellurium and its compounds Tetr achloroethylene

204

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

Science Journals Connector (OSTI)

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

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

2008-11-01T23:59:59.000Z

205

Ketone Production from the Thermal Decomposition of Carboxylate Salts  

E-Print Network (OSTI)

The MixAlco process uses an anaerobic, mixed-culture fermentation to convert lignocellulosic biomass to carboxylate salts. The fermentation broth must be clarified so that only carboxylate salts, water, and minimal impurities remain. Carboxylate...

Landoll, Michael 1984-

2012-08-15T23:59:59.000Z

206

Brief Report: Monocarboxylate Transporter 1 Deficiency and Ketone Utilization  

Science Journals Connector (OSTI)

...study have moderate intellectual disability; however, at this stage it remains unclear whether this is a direct effect of the absence of MCT1 in the brain or caused by episodes of profound ketoacidosis. The use of acidic biomolecules as an energy source presents a potential threat to acid–base homeostasis... Ketoacidosis is potentially lethal. The authors of this study found a homozygous frameshift mutation in the gene encoding monocarboxylate transporter 1 (MCT1) in a patient with recurrent, severe ketoacidosis and additional inactivating mutations in MCT1 in 96 other patients.

van Hasselt P.M.; Ferdinandusse S.; Monroe G.R.

2014-11-13T23:59:59.000Z

207

Enantioselective Copper-Catalyzed Reductive Coupling of Alkenylazaarenes with Ketones   

E-Print Network (OSTI)

Catalytic enantioselective methods for the preparation of chiral azaarene-containing compounds are of high value. By combining the utility of copper hydride catalysis with the ability of C?N-containing azaarenes to activate adjacent alkenes toward...

Saxena, Aakarsh; Choi, Bonnie; Hon, Lam Wai

2012-05-23T23:59:59.000Z

208

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

Science Journals Connector (OSTI)

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

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

2014-08-08T23:59:59.000Z

209

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

210

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

E-Print Network (OSTI)

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

211

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

Science Journals Connector (OSTI)

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

Poulain, A.

2014-02-28T23:59:59.000Z

212

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

Science Journals Connector (OSTI)

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

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

2011-08-01T23:59:59.000Z

213

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

Science Journals Connector (OSTI)

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

Oszajca, M.

2013-10-31T23:59:59.000Z

214

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

Science Journals Connector (OSTI)

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

U Meyer; W.F Hoelderich

1999-01-01T23:59:59.000Z

215

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

Science Journals Connector (OSTI)

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

John W. Diehl; Frank P. DiSanzo

216

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

Science Journals Connector (OSTI)

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

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

2012-09-01T23:59:59.000Z

217

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

Science Journals Connector (OSTI)

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

John W. Diehl; Frank P. DiSanzo

218

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

219

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

220

Bioreactor Landfill Research and Demonstration Project Northern Oaks Landfill, Harrison, MI  

SciTech Connect

A bioreactor landfill cell with 1.2-acre footprint was constructed, filled, operated, and monitored at Northern Oaks Recycling and Disposal Facility (NORDF) at Harrison, MI. With a filled volume of 74,239 cubic yards, the cell contained approximately 35,317 tons of municipal solid waste (MSW) and 20,777 tons of cover soil. It was laid on the slope of an existing cell but separated by a geosynthetic membrane liner. After the cell reached a design height of 60 feet, it was covered with a geosynthetic membrane cap. A three-dimensional monitoring system to collect data at 48 different locations was designed and installed during the construction phase of the bioreactor cell. Each location had a cluster of monitoring devices consisting of a probe to monitor moisture and temperature, a leachate collection basin, and a gas sampling port. An increase in moisture content of the MSW in the bioreactor cell was achieved by pumping leachate collected on-site from various other cells, as well as recirculation of leachate from the bioreactor landfill cell itself. Three types of leachate injection systems were evaluated in this bioreactor cell for their efficacy to distribute pumped leachate uniformly: a leachate injection pipe buried in a 6-ft wide horizontal stone mound, a 15-ft wide geocomposite drainage layer, and a 60-ft wide geocomposite drainage layer. All leachate injection systems were installed on top of the compacted waste surface. The distribution of water and resulting MSW moisture content throughout the bioreactor cell was found to be similar for the three designs. Water coming into and leaving the cell (leachate pumped in, precipitation, snow, evaporation, and collected leachate) was monitored in order to carry out a water balance. Using a leachate injection rate of 26 – 30 gal/yard3, the average moisture content increased from 25% to 35% (wet based) over the period of this study. One of the key aspects of this bioreactor landfill study was to evaluate bioreactor start up and performance in locations with colder climate. For lifts filled during the summer months, methane generation started within three months after completion of the lift. For lifts filled in winter months, very little methane production occurred even eight months after filling. The temperature data indicated that subzero or slightly above zero (oC) temperatures persisted for unusually long periods (more than six months) in the lifts filled during winter months. This was likely due to the high thermal insulation capability of the MSW and the low level of biological activity during start up. This observation indicates that bioreactor landfills located in cold climate and filled during winter months may require mechanisms to increase temperature and initiate biodegradation. Thus, besides moisture, temperature may be the next important factor controlling the biological decomposition in anaerobic bioreactor landfills. Spatial and temporal characterization of leachate samples indicated the presence of low levels of commonly used volatile organic compounds (including acetone, methyl ethyl ketone, methyl isobutyl ketone, and toluene) and metals (including arsenic, chromium, and zinc). Changes and leachate and gaseous sample characteristics correlated with enhanced biological activity and increase in temperature. Continued monitoring of this bioreactor landfill cell is expected to yield critical data needed for start up, design, and operation of this emerging process.

Zhao, Xiando; Voice, Thomas; and Hashsham, Syed A.

2006-08-29T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

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

SciTech Connect

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

Foote, R.S.; Mitra, S.

1984-01-01T23:59:59.000Z

222

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

Science Journals Connector (OSTI)

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

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

2007-01-01T23:59:59.000Z

223

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

Science Journals Connector (OSTI)

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

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

2010-01-01T23:59:59.000Z

224

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

Science Journals Connector (OSTI)

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

Hua-jie Zhu; Yi Ren; Jie Ren

2004-01-01T23:59:59.000Z

225

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

Science Journals Connector (OSTI)

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

S A Hashmi; Ashok Kumar; S K Tripathi

2007-01-01T23:59:59.000Z

226

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

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

227

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

Science Journals Connector (OSTI)

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

Agung Sudrajad; Ismail Ali; Khalid Samo; Danny Faturachman

2012-01-01T23:59:59.000Z

228

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

Science Journals Connector (OSTI)

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

S. Saravanan; G. Nagarajan; S. Sampath

2011-01-01T23:59:59.000Z

229

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

230

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

SciTech Connect

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

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

2014-02-24T23:59:59.000Z

231

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

Science Journals Connector (OSTI)

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

Christian Triebel; Nikolaos Katsikis; Hana Stará

2010-01-01T23:59:59.000Z

232

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

233

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

SciTech Connect

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

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

2012-04-01T23:59:59.000Z

234

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

SciTech Connect

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

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

2014-01-28T23:59:59.000Z

235

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

SciTech Connect

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

Eisenbraun, E.J.

1992-02-17T23:59:59.000Z

236

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

Science Journals Connector (OSTI)

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

Mazlan Said; Azhar Abdul Aziz

2012-01-01T23:59:59.000Z

237

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

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

238

An investigation of the burning rates of thin films of some selected composite propellants  

E-Print Network (OSTI)

Ammoni a/Perch 1 ori c Aci d Aluminum Atmospheres butyl Acetate Carbon Glass Cyclo tetramethylenetetrani tr amine L ad Azide IicCormick-Selph Methyl Fthyl Ketone IIitrocelIulose Oxidizer/Fue'I x-104, x-164 NcCormick-Selph material 300, 104...

Sawyer, Miles Lee

1970-01-01T23:59:59.000Z

239

Kinetic isotope effects, dynamic effects, and mechanistic studies of organic reactions  

E-Print Network (OSTI)

ŹÂ?-conjugating substituent is distal to the oxazolidinone but decreased steric interaction when the ĂŹÂ?-conjugating substituent is proximal to the oxazolidinone. Dynamic effects were studied in Diels-Alder reaction between acrolein and methyl vinyl ketone. This reaction...

Wang, Zhihong

2007-04-25T23:59:59.000Z

240

Barrier to Rotation around the Csp2-Csp2 Bond of the Ketoaldehyde Enol Ether MeC(O)CHCH?OEt As Determined by 13C NMR and ab Initio Calculations  

Science Journals Connector (OSTI)

NMR measurements and ab initio calculations were applied to determine the barriers to rotation around formally single bonds of the title methyl-?-ethoxyvinyl ketone, i.e., the vinylogue of the ethyl ester of acetic acid. For comparison, ab initio ...

Hans-Christian Siebert; Emad Tajkhorshid; Janusz Dabrowski

2001-08-22T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

An Au-Catalyzed Cyclialkylation of Electron-Rich Arenes with Epoxides To Prepare 3-Chromanols  

E-Print Network (OSTI)

, this species might be able to add to other functional groups such as epoxides in an SN2 manner. We tested epoxides (Figure 1B). The endo addition products were obtained exclusively, and the reaction(III) species in this reaction. This species then attacks methyl vinyl ketone in a manner like a Michael

He, Chuan

242

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

Science Journals Connector (OSTI)

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

Smith, G.

2014-11-19T23:59:59.000Z

243

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

E-Print Network (OSTI)

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

244

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

E-Print Network (OSTI)

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

Boyer, Edmond

245

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

SciTech Connect

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

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

1990-12-01T23:59:59.000Z

246

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

SciTech Connect

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

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

1995-05-01T23:59:59.000Z

247

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

248

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

Science Journals Connector (OSTI)

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

2013-01-01T23:59:59.000Z

249

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

SciTech Connect

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

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

2007-06-15T23:59:59.000Z

250

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

Science Journals Connector (OSTI)

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

Frank Barkusky; Christian Peth; Armin Bayer; Klaus Mann

2007-01-01T23:59:59.000Z

251

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

Science Journals Connector (OSTI)

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

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

2009-01-01T23:59:59.000Z

252

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

E-Print Network (OSTI)

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

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

2013-11-21T23:59:59.000Z

253

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

SciTech Connect

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

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

2013-10-01T23:59:59.000Z

254

Equilibrium Isotherms of Volatile Alkanes, Alkenes, and Ketones on Activated Carbon  

Science Journals Connector (OSTI)

Given the following values we obtain The measurement errors for the volumetric apparatus are (using a mercury filling and weighing method) Therefore the expected error in nads is The error may become larger than 1.6 % if the uncertainties for T and P are found to be more than the manufacturers’ specifications for the instruments. ...

Ming-Hong Lai; Richard Quio Chu; Hsiu-Chu Huang; Shih-Hong Shu; Tsair-Wang Chung

2009-05-22T23:59:59.000Z

255

Reaction of Ketones with Lithium Hexamethyldisilazide: Competitive Enolizations and 1,2-Additions  

E-Print Network (OSTI)

hexamethyldisilazide (LiHMDS, TMS2NLi) displays highly solvent-dependent chemoselectivity. LiHMDS in THF/toluene effect by two sterically unhindered ligands: THF and pyrrolidine. Despite the isostructural relation- ship of THF and pyrrolidine, LiHMDS/THF mixtures effect clean enolization, whereas LiHMDS/pyrrolidine mixtures

Collum, David B.

256

Ketone Enolization with Lithium Dialkylamides:? The Effects of Structure, Solvation, and Mixed Aggregates with Excess Butyllithium  

Science Journals Connector (OSTI)

Lawrence M. Pratt ,*† Anthony Newman ,‡ Jason St. Cyr ,‡ Harry Johnson ,§ Benjamin Miles ,§ April Lattier ,§ Elizabeth Austin ,‡ Susan Henderson ,‡ Brad Hershey ,‡ Ming Lin ,‡ Yuvaraju Balamraju ,‡ Laurel Sammonds ,‡ Jeffery Cheramie ,‡ Jonathan Karnes ,‡ Ellen Hymel ,‡ Brittini Woodford ,† and Carl Carter † ...

Lawrence M. Pratt; Anthony Newman; Jason St. Cyr; Harry Johnson; Benjamin Miles; April Lattier; Elizabeth Austin; Susan Henderson; Brad Hershey; Ming Lin; Yuvaraju Balamraju; Laurel Sammonds; Jeffery Cheramie; Jonathan Karnes; Ellen Hymel; Brittini Woodford; Carl Carter

2003-07-17T23:59:59.000Z

257

Evaluation of a,b-unsaturated ketone-based probes for papain-family cysteine proteases  

E-Print Network (OSTI)

that this reactive group shows highly selective labeling of cys- teine cathepsins in both intact cells and total cell that can be stud- ied using chemical proteomic methods. In particular, new reactive `warheads' need

Bogyo, Matthew

258

Z Group Ketone Chain Transfer Agents for RAFT Polymer Nanoparticle Modi cation via Hydrazone Conjugation  

E-Print Network (OSTI)

derivatives demonstrate a range of potential theranostic/biotechnological applications for this conveniently

Bong, Dennis

259

E-Print Network 3.0 - aromatic ketones aldehydes Sample Search...  

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

University of Nebraska-Lincoln Collection: Engineering 91 Synthesis and Reactivity of (DMSC)Ti(2-OCAr2)L2 Complexes (DMSC ) Dimethylsilyl-Bridged Summary: substrates, such as...

260

E-Print Network 3.0 - alkyl aryl ketones Sample Search Results  

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

of Chemistry, Boston University Collection: Chemistry 78 Synthesis and Reactivity of (DMSC)Ti(2-OCAr2)L2 Complexes (DMSC ) Dimethylsilyl-Bridged Summary: well-characterized...

Note: This page contains sample records for the topic "methyl isobutyl ketone" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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261

E-Print Network 3.0 - alpha-tosyloxy ketones applications Sample...  

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

of California, Davis Collection: Biotechnology 51 Synthesis and Reactivity of (DMSC)Ti(2-OCAr2)L2 Complexes (DMSC ) Dimethylsilyl-Bridged Summary: dianion) with 1 equiv...

262

Removal patterns of some alkyl phenyl ketones in a heterogeneous bacterial system  

E-Print Network (OSTI)

never lrave been wri t ten, I can only say thank you. TABLE OF CONTENTS pacCe ABSTRACT ACKNONLEDGEMENTS iLIST OF TABLES LIST OF FIGURES SECTION I Introduction and Literature Review SECTION II Apparatus and Materials Reactor Gas Chromatograph... Removal by Air Stripping Organic Component Analysis Suspended Solids pH of Reactor Fluids Diffused Air Flow Rate Temperature of Reactor Fluids SECTION IV Results Test A Test B Test C Test D Test E Test F Test G Test H Test. I Test R...

Salitros, James Joseph

2012-06-07T23:59:59.000Z

263

Pseudomonad Cyclopentadecanone Monooxygenase Displaying an Uncommon Spectrum of Baeyer-Villiger Oxidations of Cyclic Ketones  

Science Journals Connector (OSTI)

...chiral-GC column and analysis and C. Beaulieu and...1982. Quantitative analyses of biochemical kinetic...big business: the economic power of the microbe. Biotechnol...alkylation and conformational analysis of 15-hexadecanolide...

Hiroaki Iwaki; Shaozhao Wang; Stephan Grosse; Hélčne Bergeron; Ayako Nagahashi; Jittiwud Lertvorachon; Jianzhong Yang; Yasuo Konishi; Yoshie Hasegawa; Peter C. K. Lau

2006-04-01T23:59:59.000Z

264

Intramolecular cationic [5 + 2] cycloaddition reactions promoted by trimethylsilyl triflate in 3.0 M lithium perchlorate-ethyl acetate: Application to a formal total synthesis of (±)-isocomene  

Science Journals Connector (OSTI)

Trimethylsilyl triflate is an effective reagent in 3.0 M lithium perchlorate-ethyl acetate for promoting intramolecular cationic [5 + 2] cycloaddition reactions. A formal total synthesis of the angular triquinane isocomene (10) is detailed. Cationic [5 + 2] cycloaddition of quinone monoketal 40 gives rise to tricyclic diketone 35 which is subsequently converted into the known tricyclic ketone 33. Addition of methyl lithium followed by acid-catalyzed rearrangement employing the Pirrung protocol affords (±)-isocomene (10).

Paul A. Grieco; John K. Walker

1997-01-01T23:59:59.000Z

265

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

SciTech Connect

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

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

2014-03-31T23:59:59.000Z

266

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

Science Journals Connector (OSTI)

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

Machio Iwasaki; Kazumi Toriyama

1985-01-01T23:59:59.000Z

267

A STUDY OF FUNDAMENTAL REACTION PATHWAYS FOR TRANSITION METAL ALKYL COMPLEXES. I. THE REACTION OF A NICKEL METHYL COMPLEX WITH ALKYNES. II. THE MECHANISM OF ALDEHYDE FORMATION IN THE REACTION OF A MOLYBDENUM HYDRIDE WITH MOLYBDENUM ALKYLS  

SciTech Connect

I. This study reports the rapid reaction under mild conditions of internal or terminal alkynes with methyl (acetyl~ acetonato) (triphenylphosphine) nickel (1) in either aromatic or ether solvents. In all cases vinylnickel products 2 are formed by insertion of the alkyne into the nickel=methyl bond. These complexes may be converted into a variety of organic products (e.g. alkenes, esters, vinyl halides) by treatment with appropriate reagents. Unsymmetrical alkynes give selectively the one regioisomer with the sterically largest substituent next to the nickel atom. In order to investigate the stereochemistry of the initial insertion, a x-ray diffraction study of the reaction of 1 with diphenylacetylene was carried out. This showed that the vinylnickel complex formed by overall trans insertion was the product of the reaction. Furthermore, subsequent slow isomerization of this complex, to a mixture of it and the corresponding cis isomer, demonstrated that this trans addition product is the kinetic product of the reaction. In studies with other alkynes, the product of trans addition was not always exclusively (or even predominantly) formed, but the ratio of the stereoisomers formed kinetically was substantially different from the thermodynamic ratio. Isotope labeling, added phosphine, and other experiments have allowed us to conclude that the mechanism of this reaction does involve initial cis addition. However, a coordinatively unsaturated vinylnickel complex is initially formed which can undergo rapid, phosphine-catalyzed cis-trans isomerization in competition with its conversion to the isolable phosphine-substituted kinetic reaction products. II. The reaction of CpMo(CO){sub 3}H (1a) with CpMo(CO){sub 3}R (2, R= CH{sub 3}, C{sub 2}H{sub 5}) at 50{degrees} C in THF gives the aldehyde RCHO and the dimers [CpMo(CO){sub 3}]{sub 2} (3a) and [CpMo(CO){sub 2}]{sub 2} (4a). Labeling one of the reactants with a methylcyclopentadienyl ligand it was possible to show that the mixed dimers MeCpMo(CO){sub 3}-(CO){sub 3}MoCp (3b) and MeCpMo(CO){sub 2}{triple_bond}(CO){sub 2}MoCp (4b) are the predominant kinetic products of the reaction. Additionally labeling the carbonyl ligands of 1a with {sup 13}CO led to the conclusion that all three of the carbonyl ligands in 1a end up in the tetracarbonyl dimers 4a if the reaction is carried out under a continuous purge of argon Trapping studies failed to find any evidence for the intermediacy of either [CpMo(CO){sub 3}]{sup -} or [CpMo(CO){sub 3}]{sup +} in this reaction. A mechanism is proposed that involves the initial migration of the alkyl ligand in 2 to CO forming an unsaturated acyl complex which reacts with 1a to give a binuclear complex containing a three center-two electron Mo-H-Mo bond. This complex then selectively looses a carbonyl from the acyl molybdenum, migrates the hydride to that same metal, and forms a metal-metal bond. This binuclear complex with the hydride and acyl ligands on one metal reductively eliminates aldehyde, and migrates a carbonyl ligand, to give 4a directly. The other product 3a is formed by addition of two molecules of free CO to 4a.

Huggins, John Mitchell

1980-06-01T23:59:59.000Z

268

Study of immobilized catalysts. XVI. Study of structural features and catalytic properties of immobilized mono-and binuclear cobalt complexes  

SciTech Connect

A series of polymeric carriers with chelate-forming groups of diacylamine and aminovinyl ketone types and also mono- and binuclear Co (II) complexes based on them were obtained by methods of polymer-analogous transformations, startting from polyethylene (PE)-grafted (rgr-) polyacetylonitrile (PE-gr-PAN), PE-gr-polyacrylamide (PE-gr-PAA), or PE-gr-poly(methyl vinyl ketone) CPE-grPMVK). From the data of spectral and magnetic studies, a conclusion was made on the chelate structure of the Co (II) complexes synthesized with a tetrahedral configuration of the coordination unit. It was found that the immobilized Co (II) chelates have a high and stable catalytic activity in the sterospecific 1,4-cispolymerization of butadiene. It was shown that an increase in the number of Co (II) ions in the complex molecule leads to a decrease in the specific activity of the catalytic systems based on them.

Pomogailo, A.D.; Golubeva, N.D.; Uflyand, I.E.

1986-06-01T23:59:59.000Z

269

Quantum Chain Reactions and ?-Hydrogen Abstraction of Aromatic Ketones: Insights into Solid to Solid Transformations and Efficiency in Crystals  

E-Print Network (OSTI)

information, 3 solvent-free “green” synthesis, 4 ease offor applications in solvent-free, green chemical synthesis

Nielsen, Amy

2014-01-01T23:59:59.000Z

270

J. Am. Chem. SOC.1991, 113, 9571-9574 Effects of Lithium Salts on the Stereochemistry of Ketone  

E-Print Network (OSTI)

-Selective Enolate Formation 9571 Patricia L. Hall, James H. Gilchrist, and David B. Collum* Contributionfrom clear. R I 1 2 3 In 1984, Corey and Gross3reported that the E / Z selectivity for 3-pentanone! It was suggested that the in situ trapping procedure precludes rapid isomerization of ( I ) Evans, D. A. Asymmetric

Collum, David B.

271

Counter-anion role in the formation of two supra­molecular complexes: [Ag2(DPP)2](ClO4)2?CH3CN and [Ag2(DPP)2(NO3)2] {DPP is N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine}  

Science Journals Connector (OSTI)

In the Ag complex of N-[(di­phenyl­phosphanyl)methyl]pyridin-4-amine (DPP) with perchlorate, the unique Ag+ cation has a near-linear coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands. In the analogous complex with nitrate, the nitrate anions weakly chelate to each Ag+ cation, leading to each Ag+ cation having a distorted tetra­hedral coordination geometry consisting of one pyridine N atom and one P atom from two different DPP ligands, and two chelating nitrate O atoms.

Liang, G.-M.

2014-03-25T23:59:59.000Z

272

Molecular Cell Methylation of a Histone Mimic  

E-Print Network (OSTI)

,3 Andrew N. Krutchinsky,2 Ingrid Mecklenbra¨ uker,1 Agnes Viale,5 Eugene Rudensky,1 Ming-Ming Zhou,4., 2004; Huang et al., 2006; Kouskouti et al., 2004; Zhang et al., 2005). In contrast, little progr

Chait, Brian T.

273

Phytoremediation of Ionic and Methyl Mercury P  

SciTech Connect

Our long-term goal is to enable highly productive plant species to extract, resist, detoxify, and/or sequester toxic heavy metal pollutants as an environmentally friendly alternative to physical remediation methods. We have focused this phytoremediation research on soil and water-borne ionic and methylmercury. Mercury pollution is a serious world-wide problem affecting the health of human and wild-life populations. Methylmercury, produced by native bacteria at mercury-contaminated wetland sites, is a particularly serious problem due to its extreme toxicity and efficient biomagnification in the food chain. We engineered several plant species (e.g., Arabidopsis, tobacco, canola, yellow poplar, rice) to express the bacterial genes, merB and/or merA, under the control of plant regulatory sequences. These transgenic plants acquired remarkable properties for mercury remediation. (1) Transgenic plants expressing merB (organomercury lyase) extract methylmercury from their growth substrate and degrade it to less toxic ionic mercury. They grow on concentrations of methylmercury that kill normal plants and accumulate low levels of ionic mercury. (2) Transgenic plants expressing merA (mercuric ion reductase) extract and electrochemically reduce toxic, reactive ionic mercury to much less toxic and volatile metallic mercury. This metal transformation is driven by the powerful photosynthetic reducing capacity of higher plants that generates excess NADPH using solar energy. MerA plants grow vigorously on levels of ionic mercury that kill control plants. Plants expressing both merB and merA degrade high levels of methylmercury and volatilize metallic mercury. These properties were shown to be genetically stable for several generations in the two plant species examined. Our work demonstrates that native trees, shrubs, and grasses can be engineered to remediate the most abundant toxic mercury pollutants. Building on these data our working hypothesis for the next grant period is that transgenic plants expressing the bacterial merB and merA genes will (a) remove mercury from polluted soil and water and (b) prevent methylmercury from entering the food chain. Our specific aims center on understanding the mechanisms by which plants process the various forms of mercury and volatilize or transpire mercury vapor. This information will allow us to improve the design of our current phytoremediation strategies. As an alternative to volatilizing mercury, we are using several new genes to construct plants that will hyperaccumulate mercury in above-ground tissues for later harvest. The Department of Energy's Oak Ridge National Laboratory and Brookhaven National Laboratory have sites with significant levels of mercury contamination that could be cleaned by applying the scientific discoveries and new phytoremediation technologies described in this proposal. The knowledge and expertise gained by engineering plants to hyperaccumulate mercury can be applied to the remediation of other heavy metals pollutants (e.g., arsenic, cesium, cadmium, chromium, lead, strontium, technetium, uranium) found at several DOE facilities.

Meagher, Richard B.

1999-06-01T23:59:59.000Z

274

Conformation-Selective Methylation of Geminivirus DNA  

Science Journals Connector (OSTI)

...X15984) (22) were inoculated into the experimental host Nicotiana benthamiana Domin and grown in a greenhouse with supplementary lighting or in a climate chamber as described previously (81), under containment according to gene technology...

T. Paprotka; K. Deuschle; V. Metzler; H. Jeske

2011-08-10T23:59:59.000Z

275

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

SciTech Connect

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

Klier, K.; Herman, R.G.

1994-05-01T23:59:59.000Z

276

A fivefold inter­penetrating diamond­oid three-dimensional metal-organic framework constructed from benzene-1,4-di­acetic acid and flexible triazole derivatives: poly[[(2-benzene-1,4-di­acetato-2O:O){2-1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene-2N4:N4'}zinc(II)] monohydrate  

Science Journals Connector (OSTI)

The title compound has a fivefold inter­penetrating diamondoid three-dimensional metal-organic framework, with each ZnII centre surrounded by two O-donor atoms from monodentate carboxyl­ate groups belonging to two different benzene-1,4-di­acetate ligands and by two triazole N-donor atoms from two different 1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene ligands.

Shen, H.

2013-12-14T23:59:59.000Z

277

From Fields to Fuels: Recent Advances in the Microbial Production of Biofuels  

Science Journals Connector (OSTI)

In a move toward consolidated bioprocessing (engineering a microorganism that is capable of both digesting biomass and converting the resulting sugars into biofuels), the group engineered the biofuel-producing strain to express and secrete xylanases that break down xylan into xylose, a pentose that is readily catabolized by E. coli. ... Another use of the ?-oxidation pathway in biofuel production is the production of methyl ketone biofuels in E. coli. ... With improvements in both biofuel synthesis pathways and biomass digestion capabilities, our approach could provide an economical route to prodn. of advanced biofuels. ...

Yan Kung; Weerawat Runguphan; Jay D. Keasling

2012-11-05T23:59:59.000Z

278

Reactions of dimethyl carbonyl ylide produced by singlet methylene reactions with acetone in the gas phase  

E-Print Network (OSTI)

Determination of methyl ethyl ketone area Plot of' [NH][ACE]/[OX][NP] ratio versus the /Oxygen in 130 torr systems irradiated with 436 nm light Plot of [NH][ACE]/[OX][NP] ratio versus g Diluent using Argon and 0+S as diluents at 130 torr with 436 nm... irradiatiorf Least squares plot of [NH][ACE]/[IBOX][NP] versus the inverse of pressure for neat and infinitely dilute systems at 436 and 365 nm irradiations . . . ~ ~ Least squares plot of [NH][ACE]/[IBOX][NP] ratio versus mole fraction acetone at 436 nm...

Buckley, Gary Steven

2012-06-07T23:59:59.000Z

279

Green Solvents for Polymerization of Methyl Methacrylate to Poly(Methyl Methacrylate)  

Science Journals Connector (OSTI)

Solvents are often volatile organic compounds (VOCs) ... decade, chemistry research into the use of greener, alternative solvents has been grown enormously. Alternative solvents suitable for green chemistry are t...

S. Krishna Mohan

2012-01-01T23:59:59.000Z

280

Formation of Methyl Nitrite and Methyl Nitrate during Plasma Treatment of Diesel Exhaust  

Science Journals Connector (OSTI)

FTIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled ...

T. J. Wallington; J. W. Hoard; M. P. Sulbaek Andersen; M. D. Hurley; Y. Nakano; M. Kawasaki

2003-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

The Role of the Ocean in the Atmospheric Budgets of Methyl Bromide, Methyl Chloride and Methane  

E-Print Network (OSTI)

of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Shari A. Yvon-Lewis Committee Members, John D. Kessler Robert Rhew Gunnar W. Schade... to work with her. I would like to thank my committee members, Drs. John D. Kessler, Robert Rhew and Gunnar W. Schade. I went to two cruises with John and coauthored several papers with him. He gave me a lot of help and inspiration for methane study. He...

Hu, Lei

2012-10-19T23:59:59.000Z

282

Identification of Differentially Methylated Sequences in Colorectal Cancer by Methylated CpG Island Amplification  

Science Journals Connector (OSTI)

...genotype of each panel was determined. Linkage analysis was performed using the RH server of Stanford University (http://www-shgc.stanford.edu/RH/index.html). PCR primer sequences used to amplify each clone are available upon request. RT-PCR...

Minoru Toyota; Coty Ho; Nita Ahuja; Kam-Wing Jair; Qing Li; Mutsumi Ohe-Toyota; Stephen B. Baylin; Jean-Pierre J. Issa

1999-05-15T23:59:59.000Z

283

Application of Bis-acetylenic Ketones in Synthesis:? One-Pot Preparation of the 1,2,4-Triazepine and Oxatriazaindenone Cores  

Science Journals Connector (OSTI)

Mauro F. A. Adamo ,*† Jack E. Baldwin ,‡ and Robert M. Adlington ‡ ... Adamo, Mauro F. A.; Adlington, Robert M.; Baldwin, Jack E.; Pritchard, Gareth J.; Rathmell, Richard E. ... Adamo, Mauro F. A.; Adlington, Robert M.; Baldwin, Jack E.; Day, Anna L. ...

Mauro F. A. Adamo; Jack E. Baldwin; Robert M. Adlington

2005-03-17T23:59:59.000Z

284

Glucose Uptake, Lactate Release, Ketone Body Turnover, Metabolic Micromilieu, and pH Distributions in Human Breast Cancer Xenografts in Nude Rats  

Science Journals Connector (OSTI)

...and pH values; blood gas analyzer, type MT 33...melabolic wasle produc -sand Ihe energy status of malignanl...MABP), respiratory gas parameters within the...Guenther, H. Respiratory gas transport in brain under...Regulation of Carbo hydrate Metabolism, Vol. 2...

F. Kallinowski; P. Vaupel; S. Runkel; G. Berg; H. P. Fortmeyer; K. H. Baessler; K. Wagner; W. Mueller-Klieser; and S. Walenta

1988-12-01T23:59:59.000Z

285

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

FL Kansas City, MO Lake Charles, LA Los Angeles, CAFL Kansas City, MO Lake Charles, LA Los Angeles, CA

Carter, W P L

2007-01-01T23:59:59.000Z

286

The contribution of oceanic methyl iodide to stratospheric iodine  

E-Print Network (OSTI)

horizontal wind speed and vertical transport efficiency (speed Horizontal wind speed and vertical transport CH 3 Ivertical transport. Note that for these two days high www.atmos-chem-phys.net/13/11869/2013/ horizontal wind speeds

2013-01-01T23:59:59.000Z

287

Isoprenylcysteine Methylation and Demethylation Regulate Abscisic Acid Signaling in Arabidopsis  

Science Journals Connector (OSTI)

...tomato (Solanum lycopersicum) (Loraine et al., 1996; Yalovsky et al., 1996...Arabidopsis. Plant Physiol. 126: 670-684. Loraine, A.E., Yalovsky, S., Fabry, S...Cell 12: 1267-1278. Yalovsky, S., Loraine, A.E., and Gruissem, W. (1996...

David H. Huizinga; Olutope Omosegbon; Bilal Omery; Dring N. Crowell

2008-10-28T23:59:59.000Z

288

Hg L3 XANES Study of Mercury Methylation in Shredded  

E-Print Network (OSTI)

,indicatingbioaccumulationofmercury.Plantsamples collected at this site were also grown in nutrient solution with 1 ppm HgCl2 under (1) aerobic conditions

289

Some sympathomimetic activities of N-methyl-tyramine  

E-Print Network (OSTI)

this depletion by the blockage of the storage mechanism in the norepine- phrine granules and not by blocking a pump in the cell membrane (Dahlstrom et al. , 1965). It does not block the synthesis or action of catecholamines. Schumann and Philippu (1962) have... described another difference between the depletions produced by tyramine and by reserpine. Reserpine mobilizes both the catecholamines and the ATP of the storage granules while tyramine and other sympathomimetic amines release only the catecholamines...

Blankenship, James William

2012-06-07T23:59:59.000Z

290

Ethionine-induced Changes in Rat Liver Transfer RNA Methylation  

Science Journals Connector (OSTI)

...given food and water ad libitum...their drinking water for 3 days prior to the drug treatment and maintained...the drinking water. [Addition...supernatant. Where dialysis was used the...subjected to paper electrophoresis in ammo- nium...

Elsie Wainfan; Mary L. Moller; Frank A. Maschio; and M. Earl Balis

1975-10-01T23:59:59.000Z

291

The DNA methylation landscape of human early embryos  

Science Journals Connector (OSTI)

... Biodynamic Optical Imaging Center & Center for Reproductive Medicine, College of Life Sciences, Third Hospital, Peking University, Beijing 100871, China

Hongshan Guo; Ping Zhu; Liying Yan; Rong Li; Boqiang Hu; Ying Lian; Jie Yan; Xiulian Ren; Shengli Lin; Junsheng Li; Xiaohu Jin; Xiaodan Shi; Ping Liu; Xiaoye Wang; Wei Wang; Yuan Wei; Xianlong Li; Fan Guo; Xinglong Wu; Xiaoying Fan; Jun Yong; Lu Wen; Sunney X. Xie; Fuchou Tang; Jie Qiao

2014-07-23T23:59:59.000Z

292

Superhydrophobic Transparent Surface of Nanostructured Poly(Methyl Methacrylate)  

E-Print Network (OSTI)

Analysis of nonselective plasma etching of AlGaN by CF4/Ar/Cl2 V. Kuryatkov, B. Borisov, J. Saxena-period superlattices with various doping properties. Etching is performed using mixed CF4/Ar feed gases in a combined describe experiments on CF4-based plasma etching of AlGaN layers with widely varying com- positions

Kim, Ho-Young

293

Methyl arsenic adsorption and desorption behavior on iron oxides  

E-Print Network (OSTI)

as competitive ligands. Arsenic was measured by FI-HG-AAS. MMAsV and iAsV were adsorbed in higher amounts than DMAsV on goethite and ferrihydrite at all pH values studied. Although MMAsV and iAsV were adsorbed quantitatively at lower concentrations on goethite...

Lafferty, Brandon James

2005-08-29T23:59:59.000Z

294

Classical trajectory simulations of photodissociation of methyl bromide at surfaces  

E-Print Network (OSTI)

as the P -phase of solid CH&Br to simulate dissociation from high coverages of the adsorbate where CH&Br ice is formed. The intermolecular interaction between the gas and surface atoms included long-range dispersion forces and short-range repulsive forces... ~ Cia coefficients for the interaction of CH&Br with LiF. 28 II. Structure and energetics parameters of CH&Br adsorbed on rough surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . " " 31 III. Buckingham potential parameters for CHsBr. . . 42...

Watson, Joseph Marion

2012-06-07T23:59:59.000Z

295

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

J. R. Holmes (1977): “Nitrogen Dioxide Photolysis in the LosO3 Ozone NO Nitric Oxide NO2 Nitrogen Dioxide NO3 NitrateNitrogen Pentoxide HONO Nitrous Acid HNO3 Nitric Acid HNO4 Peroxynitric Acid HO2H Hydrogen Peroxide CO Carbon Monoxide SO2 Sulfur Dioxide

Carter, W P L

2007-01-01T23:59:59.000Z

296

Diffusion of propane (1); 2-methyl-propane (2)  

Science Journals Connector (OSTI)

This document is part of Subvolume A ‘Gases in Gases, Liquids and their Mixtures’ of Volume 15 ‘Diffusion in Gases, Liquids and Electrolytes’ of Landolt-Börnstein Group IV ‘Physical Chemistry’. It is part of the ...

J. Winkelmann

2007-01-01T23:59:59.000Z

297

Investigation of the Atmospheric Ozone Impacts of Methyl Iodide  

E-Print Network (OSTI)

known amounts of ethylene, propane, propylene, n-butane, n-3 ppm -1 min -1 . (Primarily propane) ALK3 Alkanes and other

Carter, W P L

2007-01-01T23:59:59.000Z

298

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth  

Science Journals Connector (OSTI)

...sewage gas, and As(C2H5)3 has been recorded in landfill gas; they are likely formed by microbial action, thus...2C2H5As. Only sewage gas formed CH3AsH2, and only landfill gas formed (C2H5)3As. Particularly noteworthy is the...

Ronald Bentley; Thomas G. Chasteen

2002-06-01T23:59:59.000Z

299

Measurement of Mercury Methylation in Lake Water and Sediment Samples  

Science Journals Connector (OSTI)

...suggest a linear relation- ship between overall microbial activity...weeks to 4 days, enabling the detection of short-term fluctuations...seawater by ultra-violet radiation, analytical and other applications...no. 25. Canadian Fish and Marine Service, Winnipeg. 34. Stary...

Akira Furutani; John W. M. Rudd

1980-10-01T23:59:59.000Z

300

Sub-millimeter sized methyl butanoate droplet combustion: Microgravity experiments  

E-Print Network (OSTI)

1. Introduction Biodiesel is a renewable fuel source suitable for use within the current transport of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA b Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA Available online 5 September

Walter, M.Todd

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Methylation of 16S RNA during ribosome assembly in vitro  

Science Journals Connector (OSTI)

... 16S RNA. Little is known, however, about the role of ribosomal proteins in the processing of precursor 16S RNA7. Recent experiments which demonstrated that 16S RNA from kasugamycin-resistant ... RNA and the assembly map (Fig. 4)14,16 indicates these proteins are strongly interrelated and occupy an early part of the map. In addition to S4, S8, ...

Pallaiah Thammana; William A. Held

1974-10-25T23:59:59.000Z

302

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth  

Science Journals Connector (OSTI)

...about 50%) is used in the pharmaceutical industry (76, 201, 254). The 1899 edition...metalloid compounds in gases from domestic waste deposits with GC/ICP-MS. Fresenius...1991. Microbial energetics applied to waste repositories. Experientia 47: 645-687...

Ronald Bentley; Thomas G. Chasteen

2002-06-01T23:59:59.000Z

303

Synthetic approaches to the activation of substituted 2-methyl pyridines  

E-Print Network (OSTI)

increases in the yield and rate of these reactions is an important objective. This thesis describes synthetic approaches to a new class of ligands containing two picolinic acid units conected together by a non-oxidizable chain. An improved procedure...

Cancanon, Fernadina de la Caridad

2012-06-07T23:59:59.000Z

304

Computational prediction of methylation status in human genomic sequences  

E-Print Network (OSTI)

H. Bestor , and Michael Q. Zhang* *Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724 and ¶Department of Chemical Engineering, Columbia University, New York, NY 10032 Communicated by Michael H. Wigler, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, April 12, 2006 (received for review October 25

305

Properties of some ionic liquids based on 1-methyl-3-octylimidazolium and 4-methyl-N-butylpyridinium cations.  

E-Print Network (OSTI)

Ionic liquids as green solvents: progress and prospects.ionic liquids are “green” solvents, i.e. , environmentally

Papaiconomou, Nicolas; Yakelis, Neal; Salminen, Justin; Bergman, Robert; Prausnitz, John M.

2005-01-01T23:59:59.000Z

306

Global budgets of oceanic and atmospheric methyl iodide: development of methyl iodide as a tracer for marine convection  

E-Print Network (OSTI)

), wetlands (7 Gg yr \\Gamma1 ) and wood fuel (3 Gg yr \\Gamma1 ) are also included in the model. A global

Jacob, Daniel J.

307

Synthesis and structure of methyl 8-allyl-6-bromo-2-methyl-1,2,3,4-tetrahydroquinoline-4-carboxylate  

SciTech Connect

The compound C{sub 15}H{sub 18}NO{sub 2}Br was synthesized and characterized by X-ray diffraction. The crystals belong to the monoclinic system, sp. gr. P2{sub 1}/n, a = 8.913(2) A, b = 23.637(6) A, c = 13.892(3) A, {beta} = 90.31(2){sup o}, Z = 8, V = 2926.8(12) A{sup 3}, {rho}{sub calc} = 1.472 g/cm{sup 3}. The bond lengths and bond angles in two molecules are equal within an experimental error and are typical of this class of compounds. The conformational differences of the saturated heterocyclic and methoxycarbonyl fragments of the molecules result in the presence of two crystallographically independent molecules in the crystal structure.

Zhuravleva, Yu. A., E-mail: orgchem@samgtu.ru; Zimichev, A. V.; Zemtsova, M. N. [Samara State Technical University (Russian Federation); Rybakov, V. B., E-mail: rybakov@struct.chem.msu.ru [Moscow State University, Department of Chemistry (Russian Federation); Klimochkin, Yu. N. [Samara State Technical University (Russian Federation)

2010-09-15T23:59:59.000Z

308

Performance improvement of TiO2 supported on adsorbents for photocatalytic degradation of MEK in air  

Science Journals Connector (OSTI)

Photocatalytic degradation of Methyl Ethyl Ketone (MEK) was carried out in gas phase using TiO2 supported on different adsorbents. Based on size and surface area, three different adsorbents, montmorillonite, ?-zeolite and MCM-41 were tested. A fluidised bed annular photoreactor fitted with either 254 or 365 nm lamps was used for the photodegradation studies. The removal rates of MEK were higher for the catalysts supported on the adsorbent as compared to bare TiO2 (Degussa P25 and sol-gel TiO2) due to both improved adsorption and photocatalytic degradation. The photocatalytic activity of the supported TiO2 was maximum around 50 wt.% loading of TiO2. Among all the adsorbents tested, montmorillonite showed better removal rate than MCM-41 and ?-zeolite. Some limited experiments were conducted with Trichloroethylene (TCE) to evaluate the effect of polarity of the organic compound on overall degradation using the supported catalysts.

Pavan Kumar Puttamraju; Madhumita B. Ray

2008-01-01T23:59:59.000Z

309

Mass Spectroscopic Determination of Photoionization Products  

Science Journals Connector (OSTI)

A radio?frequency mass spectrometer of the Bennett type has been utilized to measure the mass of ions formed by photoionization of several gases by the ultraviolet radiation of a hydrogen discharge. Investigations were performed up to 11.4 electron volts the LiF cutoff. The mass spectra were found to be very simple and usually consisted of only one peak representing the mass of the whole molecule. This has been found to be true for acetone butadiene butene carbon disulfide methyl?ethyl ketone nitric oxide propylene and toluene. Only in the case of butane ethyl acetate and isopropyl alcohol fragment ions have been found. Some of them are even more intense than the parent ions. Undesirable ``secondary spectra '' reported by Lossing and Tanaka can be avoided by grounding of the lithium fluoride window.

Richard F. Herzog; Frederick F. Marmo

1957-01-01T23:59:59.000Z

310

Influence of complexation processes on the catalytic properties of some polymer-based cobalt compounds for oxygen electroreduction  

SciTech Connect

Electrochemical and X-ray absorption techniques have been used to determine the influence of complexation processes on the catalytic properties of heat-treated systems composed by the mixture of one polymer and Co acetate. Three non-nitrogenous polymers were studied: poly(methyl vinyl ketone) (PVK), poly(acrylic acid) (PAA); and polystyrene (PE). The catalysts composed by PE and PAA presented very low activity for the O{sub 2} reduction; a maximum of activity was found for the PVK catalyst at 100{degree}C. XAFS experiments at the Co, N, C, and O K edges showed that complexation between Co ions and the polymer yields a good dispersion of the Co ions and formation of small Co clusters during the thermal treatment. The absence of complexation leads to very poor activity, as in the case of PE and PAA. 14 refs., 13 figs., 5 tabs.

Alves, M.C.M.; Tourillon, G. [LURE, Orsay (France)

1996-05-02T23:59:59.000Z

311

Premixed ignition behavior of alternative diesel fuel-relevant compounds in a motored engine experiment  

SciTech Connect

A motored engine study using premixed charges of fuel and air at a wide range of diesel-relevant equivalence ratios was performed to investigate autoignition differences among surrogates for conventional diesel fuel, gas-to-liquid (GTL) diesel fuel, and biodiesel, as well as n-heptane. Experiments were performed by delivering a premixed charge of vaporized fuel and air and increasing the compression ratio in a stepwise manner to increase the extent of reaction while monitoring the exhaust composition via Fourier transform infrared (FTIR) spectrometry and collecting condensable exhaust gas for subsequent gas chromatography/mass spectrometry (GC/MS) analysis. Each fuel demonstrated a two-stage ignition process, with a low-temperature heat release (LTHR) event followed by the main combustion, or high-temperature heat release (HTHR). Among the three diesel-relevant fuels, the magnitude of LTHR was highest for GTL diesel, followed by methyl decanoate, and conventional diesel fuel last. FTIR analysis of the exhaust for n-heptane, the conventional diesel surrogate, and the GTL diesel surrogate revealed that LTHR produces high concentrations of aldehydes and CO while producing only negligible amounts of CO{sub 2}. Methyl decanoate differed from the other two-stage ignition fuels only in that there were significant amounts of CO{sub 2} produced during LTHR; this was the result of decarboxylation of the ester group, not the result of oxidation. GC/MS analysis of LTHR exhaust condensate for n-heptane revealed high concentrations of 2,5-heptanedione, a di-ketone that can be closely tied to species in existing autoignition models for n-heptane. GC/MS analysis of the LTHR condensate for conventional diesel fuel and GTL diesel fuel revealed a series of high molecular weight aldehydes and ketones, which were expected, as well as a series of organic acids, which are not commonly reported as products of combustion. The GC/MS analysis of the methyl decanoate exhaust condensate revealed that the aliphatic chain acts similarly to n-paraffins during LTHR, while the ester group remains intact. Thus, although the FTIR data revealed that decarboxylation occurs at significant levels for methyl decanoate, it was concluded that this occurs after the aliphatic chain has been largely consumed by other LTHR reactions. (author)

Szybist, James P.; Boehman, Andre L.; Haworth, Daniel C. [Pennsylvania State University, Fuel Science Program, 405 Academic Activities Building, University Park, PA 16802 (United States); Koga, Hibiki [Honda R and D Company, Ltd., Asaka-shi, Saitama 351-0024 (Japan)

2007-04-15T23:59:59.000Z

312

Alkylaluminum Halide Induced Reactions of Carbonyl Compounds with Unactivated Alkenes  

Science Journals Connector (OSTI)

Aldehydes, ketones and ?,?-unsaturated aldehydes and ketones undergo a wide variety of reactions with unactivated alkenes in the presence of alkylaluminum halide catalysts. Ene reactions, Diels-Alder reactions...

Barry B. Snider

1989-01-01T23:59:59.000Z

313

Vapor-liquid equilibria for copolymer+solvent systems: Effect of intramolecular repulsion  

SciTech Connect

Role of intramolecular interactions in blend miscibility is well documented for polymer+copolymer mixtures. Some copolymer+polymer mixtures are miscible although their corresponding homopolymers are not miscible; for example, over a range of acrylonitrile content, styrene/acrylonitrile copolymers are miscible with poly(methyl methacrylate) but neither polystyrene nor polyacrylonitrile is miscible with poly(methyl methacrylate). Similarly, over a composition range, butadiene/acrylonitrile copolymers are miscible with poly(vinyl chloride) while none of the binary combinations of the homopolymers [polybutadiene, polyacrylonitrile, and poly(vinyl chloride)] are miscible. This behavior has been attributed to ``intramolecular repulsion`` between unlike copolymer segments. We have observed similar behavior in vapor-liquid equilibria (VLE) of copolymer+solvent systems. We find that acrylonitrile/butadiene copolymers have higher affinity for acetonitrile solvent than do polyacrylonitrile or polybutadiene. We attribute this non-intuitive behavior to ``intramolecular repulsion`` between unlike segments of the copolymer. This repulsive interaction is weakened when acetonitrile molecules are in the vicinity of unlike copolymer segments, favoring copolymer+solvent miscibility. We find similar behavior when acetonitrile is replaced by methyl ethyl ketone. To best knowledge, this effect has not been reported previously for VLE. We have obtained VLE data for mixtures containing a solvent and a copolymer as a function of copolymer composition. It appears that, at a given solvent partial pressure, there may be copolymer composition that yields maximum absorption of the solvent. This highly non-ideal VLE phase behavior may be useful for optimum design of a membrane for a separation process.

Gupta, R.B.; Prausnitz, J.M.

1995-03-01T23:59:59.000Z

314

Mercury Distribution across 14 U.S. Forests. Part II: Patterns of Methyl Mercury Concentrations and Areal Mass of Total and Methyl Mercury  

Science Journals Connector (OSTI)

(9) In summary, the sites include (in order from south to north): (S1) a pine forest located near Gainesville, Florida; (S2) a mixed deciduous hardwood forest near Oak Ridge, Tennessee; (S3) an oak forest in Ashland, Missouri; (S4 and S5) two sites in the Sierra Nevada Mountain range south of Reno, Nevada, with one site affected by a stand-replacing wildfire in 1981 and an adjacent “intact” site that received no mature tree mortality;(28) (S6) a blue oak site in the foothills of California near Marysville; (S7 and S8) two Jeffrey pine forests near Truckee, California, where one site experienced prescribed burning treatments in 2002 while no prescribed burning was conducted in an adjacent site; (28) (S9) a high-elevation Rocky Mountain coniferous forest at Niwot Ridge, Colorado; (S10) a sugar-maple forest located near Hart, Michigan; (S11) a mixed, deciduous forest in Bartlett, New Hampshire; (S12) a coniferous forest in Howland, Maine; and (S13 and S14) two forest sites southeast of Seattle, Washington, one dominated by previously planted coniferous Douglas fir and an adjacent deciduous stand dominated by red alder. ... MeHg was analyzed for 12 of the 14 sites, not considering the two sites affected by prescribed burning and wildfires (sites S5 and S8). ...

Daniel Obrist

2012-04-22T23:59:59.000Z

315

GC and Mass Spectral Studies on Acylated Side Chain Regioisomers of 3-Methoxy-4-methyl-phenethylamine and 4-Methoxy-3-methyl-phenethylamine  

Science Journals Connector (OSTI)

......amine in 50 L of ethyl acetate followed by addition...with 200 L of ethyl acetate and 50 L of pyridine...working solutions. Synthesis The methods for the...upon reduction with lithium aluminum hydride (LAH...R.F.X. Klein. Synthesis and characteri- zation......

Tamer Awad; Jack DeRuiter; Tarek Belal; C. Randall Clark

2009-04-01T23:59:59.000Z

316

Isolation and characterization of methyl viologen-sensitive mutants of Escherichia coli K-12.  

Science Journals Connector (OSTI)

...MV), or paraquat, is a powerful superoxide radical propa- gator (12, 17, 18). MV is readily reduced by a single electron...only to MV and are resistant to other active oxygen propa- gator reagents (19) such as hydrogen peroxide and ionizing radiation...

M Morimyo

1988-05-01T23:59:59.000Z

317

Calmodulin-Mediated Signal Transduction Pathways in Arabidopsis Are Fine-Tuned by Methylation  

Science Journals Connector (OSTI)

...unique corresponding sites. CaM KMT OX Construct A synthetic DNA fragment of general structure 5-XhoI-native CaM...HindIII-CaM KMT was designed and the corresponding synthetic DNA fragment generated (GeneArt; see Supplemental Table...

Joydeep Banerjee; Roberta Magnani; Meera Nair; Lynnette M. Dirk; Seth DeBolt; Indu B. Maiti; Robert L. Houtz

2013-11-27T23:59:59.000Z

318

Effect of Methyl Methanesulfonate on Macromolecular Biosynthesis in P388F Cells  

Science Journals Connector (OSTI)

...4-Dimethanesulphonoxybutane (Myleran), S-/3-L-Alanyltetrahydrothiophenium Mesylate, Tetrahydrothiophene and Tetrahydrothiophene-l:l-dioxide in the Rat, Rabbit and Mouse. Biochem. Pharmacol., 6: 217- 227, 1961...

Brian W. Fox and Margaret Fox

1967-11-01T23:59:59.000Z

319

Maize Chromomethylase Zea methyltransferase2 Is Required for CpNpG Methylation  

Science Journals Connector (OSTI)

...RACE). RACE was conducted using the Marathon cDNA Amplification Kit (Clontech, Palo...isolated, and ends were sequenced using Marathon primers and gene-specific primers...100-muL aliquots and overlaid with mineral oil. The bisulfite modification was conducted...

Charles M. Papa; Nathan M. Springer; Michael G. Muszynski; Robert Meeley; Shawn M. Kaeppler

320

Fate of Triclosan and Triclosan-Methyl in Sewage TreatmentPlants and Surface Waters  

Science Journals Connector (OSTI)

The fate of triclosan in diverse stages of two sewage treatment ... two-stage biologic (activated sludge) process removed triclosan more efficiently than the STP with a ... not very effective. The elimination rat...

Kai Bester

2005-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Inhibition of Host Cell Ribosomal Ribonucleic Acid Methylation by Foot-and-Mouth Disease Virus  

Science Journals Connector (OSTI)

...chromatography, which has a high resolving power for the nucleic acids (based on secondary...and J. Polatnick. 1968. The site of foot-and-mouth disease virus ribonucleic...and G. Vande Woude. 1966. Studies on foot-and-mouth disease virus ribonucleic...

Richard Ascione; George F. Vande Woude

1969-11-01T23:59:59.000Z

322

Unconventional Air-Stable Interdigitated Bilayer Formed by 2,3-Disubstituted Fatty Acid Methyl Esters  

Science Journals Connector (OSTI)

The diffusion-limited aggregation (DLA) model is applied to describe the formation of the fractal structures of the bilayer as observed in the second plateau. ... For the fluorescence microscopy investigations, the film balance (144 cm2, Riegler & Kirstein) was mounted onto the stage of the Olympus microscope BX-FLA (Hamburg, Germany) equipped with a mercury lamp (USH-102D 100 W, power supply unit BH2-RFL-T3), an objective (LMPLFL 50×), and a CCD camera with a camera controller (Hamamatsu C4742-95, Hamamatsu, Japan). ...

Xiaodong Chen; Susanne Wiehle; Markus Weygand; Gerald Brezesinski; Ute Klenz; Hans-Joachim Galla; Harald Fuchs; Günter Haufe; Lifeng Chi

2005-10-05T23:59:59.000Z

323

Carbon-Sulfur Bond Cleavage of Methyl-Substituted Thiophenes with Iridium(III)  

E-Print Network (OSTI)

author. E-mail: jones@chem.rochester.edu. (1) Topsøe, H.; Clausen, B. S.; Massoth, F. E. Hydrotreating

Jones, William D.

324

Catalytic Hydrodeoxygenation of Methyl-Substituted Phenols: Correlations of Kinetic Parameters with Molecular Properties  

E-Print Network (OSTI)

. Introduction As a result of increasing environmental concerns, catalytic hydrotreating has become an important, oil shale, and tar sands would render the hydrotreating of oxygen-containing com- pounds, mostly

Simons, Jack

325

Absorption Spectra and Photolysis of Methyl Peroxide in Liquid and Frozen Water  

E-Print Network (OSTI)

, University of California, Irvine, California 92697, United States Department of Physical Chemistry with low temperatures, in the presence of clouds with a high liquid-water content and large solar zenith

Nizkorodov, Sergey

326

Toward Organic Photohydrides: Excited-State Behavior of 10-Methyl-9-phenyl-9,10-dihydroacridine  

E-Print Network (OSTI)

, United States § Department of Chemistry, University of Southern California, Los Angeles, California 90089 be powered using the photon's energy. Such a photochemical event can, in turn, be used to generate solar

Krylov, Anna I.

327

Photochemistry of Methyl Bromide on the ?-Cr2O3(0001) Surface...  

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

desorption (PSD). Irradiation of adsorbed CH3Br with broad band light from a Hg arc lamp resulted in both photodesorption and photodecomposition of the parent molecule at...

328

Multiple Fatalities Involving a New Designer Drug: Para-Methyl-4-Methylaminorex  

Science Journals Connector (OSTI)

......so-called head shops or over the internet and are often described as not...submitted in a number of drug abuse deaths; some of which were...Aks S.E. Emerging drugs of abuse. Emergency Medicine Clinics...Future synthetic drugs of abuse. (1988) Castonguay, R......

S. Cosbey; S. Kirk; M. McNaul; L. Peters; B. Prentice; A. Quinn; S.P. Elliott; S.D. Brandt; R.P. Archer

2014-01-01T23:59:59.000Z

329

Production and Fate of Methylated Sulfur Compounds from Methionine and Dimethylsulfoniopropionate in Anoxic Salt Marsh Sediments  

Science Journals Connector (OSTI)

...2374-2377. 15. Howarth, R. W., and J. M...a New England salt marsh. Limnol. Oceanogr...reduction pathways in salt marsh sediments. Limnol...1037-1051. 18. Kiene, R. P., R. S. Oremland...26. Oremland, R. S., L. Marsh, and D. J. DesMarais...

Ronald P. Kiene; Pieter T. Visscher

1987-10-01T23:59:59.000Z

330

Effect of Unburned Methyl Esters on the NOx Conversion of Fe-Zeolite SCR Catalyst  

SciTech Connect

Engine and flow reactor experiments were conducted to determine the impact of biodiesel relative to ultra-low-sulfur diesel (ULSD) on inhibition of the selective catalytic reduction (SCR) reaction over an Fe-zeolite catalyst. Fe-zeolite SCR catalysts have the ability to adsorb and store unburned hydrocarbons (HC) at temperatures below 300 C. These stored HCs inhibit or block NO{sub x}-ammonia reaction sites at low temperatures. Although biodiesel is not a hydrocarbon, similar effects are anticipated for unburned biodiesel and its organic combustion products. Flow reactor experiments indicate that in the absence of exposure to HC or B100, NO{sub x} conversion begins at between 100 and 200 C. When exposure to unburned fuel occurs at higher temperatures (250-400 C), the catalyst is able to adsorb a greater mass of biodiesel than of ULSD. Experiments show that when the catalyst is masked with ULSD, NO{sub x} conversion is inhibited until it is heated to 400 C. However, when masked with biodiesel, NO{sub x} conversion is observed to begin at temperatures as low as 200 C. Engine test results also show low-temperature recovery from HC storage. Engine tests indicate that, overall, the SCR system has a faster recovery from HC masking with biodiesel. This is at least partially due to a reduction in exhaust HCs, and thus total HC exposure with biodiesel.

Williams, A.; Ratcliff, M.; Pedersen, D.; McCormick, R.; Cavataio, G.; Ura, J.

2010-03-01T23:59:59.000Z

331

Reverse Atom Transfer Radical Polymerization of Methyl Methacrylate in Room-Temperature Ionic Liquids  

E-Print Network (OSTI)

liq- uids have been considered and used as a new generation of green solvents for a number of or solvents, a much smaller amount of the catalyst was used. After a relatively easy removal of the polymer Chemistry, Vol. 41, 143­151 (2003) © 2002 Wiley Periodicals, Inc. 143 #12;tion solvents will make

Wan, Xin-hua

332

Methylation of Histone H3 Lysine 36 Is Required for Normal Development in Neurospora crassa  

Science Journals Connector (OSTI)

...slowly, and though they produced abundant aerial hyphae, they conidiated sparsely (Fig...Microscopic examination revealed that most aerial hyphae lacked the constrictions and budding...Yoshiura Ki, T. Ohta, T. Kishino, Y. Fukushima, N. Niikawa, and N. Matsumoto. 2002...

Keyur K. Adhvaryu; Stephanie A. Morris; Brian D. Strahl; Eric U. Selker

2005-08-01T23:59:59.000Z

333

Disruption of DNA methylation induces genome-specific changes in gene expression in Arabidopsis allotetraploids  

E-Print Network (OSTI)

the contrib- uted genomes of the new polyploid are meiotically recombinant or nonrecombinant, re- spectively, where the meiotic behavior reflects genome ?divergence?. Polyploidy is a prominent phenomenon among plants. 1Around 95% of angiosperms and 70... that govern gene expression in polyploids. The subspecies Arabidopsis thaliana and A. arenosa diverged from each other ~5.8 Mya and share more than 95% similarity in genomic sequence (Koch et al., 2001). Interspecific hybridization can occur between...

Chen, Meng

2007-04-25T23:59:59.000Z

334

Type II restriction-modification system methylation subunit of Alicyclobacillus acidocaldarius  

DOE Patents (OSTI)

Isolated and/or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius are provided. Further provided are methods for modulating or altering recombination inside or outside of a cell using isolated and/or purified polypeptides and/or nucleic acid sequences from Alicyclobacillus acidocaldarius.

Lee, Brady D; Newby, Deborah T; Lacey, Jeffrey A; Thompson, David N; Thompson, Vicki S; Apel, William A; Roberto, Francisco F; Reed, David W

2013-10-29T23:59:59.000Z

335

Mechanisms Regulating Mercury Bioavailability for Methylating Microorganisms in the Aquatic Environment: A Critical Review  

E-Print Network (OSTI)

crystalline particles that cannot be adequately represented by conventional chemical equilibrium models for Hg widely in the nature (even in remote areas) through a complex web of trans- formation and transport of thousands of children are born each year with in utero MeHg exposures exceeding health guidelines.5

336

Sulfate-Reducing Bacterium Desulfovibrio desulfuricans ND132 as a Model for Understanding Bacterial Mercury Methylation  

Science Journals Connector (OSTI)

...Phylogenetically, ND132 falls into a large group of salt-tolerant...Mercury Science Focus Area Program at Oak Ridge National...Minnesota): importance of atmospheric deposition and ecosystem...Article Research Support, Non-U.S. Gov't Research...Support, U.S. Gov't, Non-P.H.S. | 0 DNA...

Cynthia C. Gilmour; Dwayne A. Elias; Amy M. Kucken; Steven D. Brown; Anthony V. Palumbo; Christopher W. Schadt; Judy D. Wall

2011-04-22T23:59:59.000Z

337

Kinetics of methyl radical-hydroxyl radical collisions and methanol decomposition.  

SciTech Connect

The CH{sub 3} + OH bimolecular reaction and the dissociation of methanol are studied theoretically at conditions relevant to combustion chemistry. Kinetics for the CH{sub 3} + OH barrierless association reaction and for the H + CH{sub 2}OH and H + CH{sub 3}O product channels are determined in the high-pressure limit using variable reaction coordinate transition state theory and multireference electronic structure calculations to evaluate the fragment interaction energies. The CH{sub 3} + OH {yields} {sup 3}CH{sub 2} + H{sub 2}O abstraction reaction and the H{sub 2} + HCOH and H{sub 2} + H{sub 2}CO product channels feature localized dynamical bottlenecks and are treated using variational transition state theory and QCISD(T) energies extrapolated to the complete basis set limit. The {sup 1}CH{sub 2} + H{sub 2}O product channel has two dynamical regimes, featuring both an inner saddle point and an outer barrierless region, and it is shown that a microcanonical two-state model is necessary to properly describe the association rate for this reaction over a broad temperature range. Experimental channel energies for the methanol system are reevaluated using the Active Thermochemical Tables (ATcT) approach. Pressure dependent, phenomenological rate coefficients for the CH{sub 3} + OH bimolecular reaction and for methanol decomposition are determined via master equation simulations. The predicted results agree well with experimental results, including those from a companion high-temperature shock tube determination for the decomposition of methanol.

Jasper, A. W.; Klippenstein, S. J.; Harding, L. B.; Ruscic, B.; Chemistry

2007-01-01T23:59:59.000Z

338

Neutron Scattering Study of Vermiculite?Poly(vinyl methyl ether) Mixtures  

Science Journals Connector (OSTI)

Neutrons scattered by the gel samples were recorded on a two-dimensional area detector, software coded as 128 × 128 pixels, situated 1.5 m behind the samples, covering the approximate q range between 0.2 and 2 nm-1, where the wavenumber q is defined by the equation with ? being the scattering angle. ... The quartz sample cells used were practically transparent to neutrons at the wavelength utilized on the SANS-J, and the small angle neutron scattering from D2O was of low intensity and completely unstructured over the q range studied. ...

H. Jinnai; M. V. Smalley; T. Hashimoto; S. Koizumi

1996-03-06T23:59:59.000Z

339

Reactions of Methyl Perfluoroalkyl Ethers with Isopropyl Alcohol: Experimental and Theoretical Studies  

Science Journals Connector (OSTI)

B&W Pantex, LLC, Amarillo, Texas 79120, United States ... Chemicals and Materials ... Physical Chemistry Chemical Physics (2007), 9 (29), 3864-3871 CODEN: PPCPFQ; ISSN:1463-9076. ...

Howard C. Knachel; Vladimir Benin; Chadwick D. Barklay; Janine C. Birkbeck; Billy D. Faubion; William E. Moddeman

2012-07-16T23:59:59.000Z

340

A study of the mixed association of cholesterol with methyl cholate by vapor pressure osmometry  

E-Print Network (OSTI)

out on a Knauer Vapor Pressure Osmometer equipped w1th the Knauer Universal Temperature Measuring Apparatus (a sensitive Wheatstone bridge with a 10-turn helical potentiometer) and a chart recorder. A thorough discussion of some of the experimental... at the desired temperature. Two themistors are mounted in the chamber and are coupled to the Wheatstone bridge. Using syr1nges, a drop of pure solvent is placed on one themistor and a drop of solution on the other. Because of the lowering of solvent vapor...

Foster, Bruce William

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

CpG Island Methylator Phenotype Association with Elevated Serum ?-Fetoprotein Level in Hepatocellular Carcinoma  

Science Journals Connector (OSTI)

...that only a subset of EGR1-containing, WTI-responsive promoters may be physiologically...supplementalglutamine. Sequence analysis of the WTI transcript has been described previously...to examine the expression of postulated WTI-target genes with EGR1-containing promoters...

Changsong Zhang; Zhengyou Li; Yue Cheng; Fengqi Jia; Rong Li; Mengchao Wu; Ke Li; Lixin Wei

2007-02-01T23:59:59.000Z

342

DNMT1 Is Regulated by ATP-Citrate Lyase and Maintains Methylation Patterns during Adipocyte Differentiation  

Science Journals Connector (OSTI)

...nuclear pellet was resuspended in 500 mul of nuclear lysis buffer (50 mM Tris [pH 8], 5...acetyl-CoA can contribute to the regulation of nuclear histone acetylation (7). Protein levels...C Carlberg, and L Sinkkonen. 2012. Dataset integration identifies transcriptional...

Tatiana Londońo Gentile; Chao Lu; Peter M. Lodato; Sarah Tse; Scott H. Olejniczak; Eric S. Witze; Craig B. Thompson; Kathryn E. Wellen

2013-07-29T23:59:59.000Z

343

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

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

of the discovery of arsenic in drinking-water in Bangladesh and recommends intervention strategies Source: California at Berkeley, University of - School of Public Health,...

344

E-Print Network 3.0 - aromatic hydrocarbons methyl Sample Search...  

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

Renewable Energy 2 Quantification of Local Ozone Production Attributable to Automobile Hydrocarbon Emissions Summary: -fueled automobiles, most cyclic hydrocarbons are...

345

The High-Pressure Characterization of Energetic Materials: 2-Methyl-5-Nitramino-2H-Tetrazole  

SciTech Connect

The isothermal structural properties, equation of state, and vibrational dynamics of 2MNT were studied under high-pressure using synchrotron XRD and optical Raman and IR microspectroscopy. Analysis of the XRD patterns revealed no indication of a phase transition to near 15 GPa and the pressure-volume isotherm remained smooth to 15 GPa. Near 15 GPa, significant sample damage was observed from the X-ray beam which precluded the acquisition of patterns above this pressure. XRD and Raman spectroscopic measurements showed the monoclinic ambient condition phase of 2MNT remains the dominant phase to near 20 GPa, although a shift of the NO{sub 2} IR active vibrational modes to lower frequencies suggested a subtle geometry modification not reflected in the XRD data.

J Ciezak

2011-12-31T23:59:59.000Z

346

Cysteine Dioxygenase 1 Is a Tumor Suppressor Gene Silenced by Promoter Methylation in Multiple Human Cancers  

E-Print Network (OSTI)

purchased from Invitrogen (Carlsbad, CA), and the TaqManTrizol (Invitrogen, Carlsbad, CA) and reverse- transcribed

2012-01-01T23:59:59.000Z

347

On the spherically symmetrical combustion of methyl decanoate droplets and comparisons with detailed numerical modeling  

E-Print Network (OSTI)

.e., 40­50% for CI compared to 25­30% for SI). As such, diesel power has the potential for an immediate impact on petroleum consumption, especially when conventional diesel is blended with bio-diesel fuels [3­5]. Blending diesel fuel with a fuel derived from sustainable sources will have an immediate impact

Walter, M.Todd

348

Stochastic subwavelength structures on poly(methyl methacrylate) surfaces for antireflection generated by plasma treatment  

Science Journals Connector (OSTI)

Subwavelength structures of sufficient height-to-width aspect ratio are adequate for reduction of the Fresnel reflection of surfaces. In the case of low-pressure plasma-treated...

Leitel, Robert; Schulz, Ulrike; Kaiser, Norbert; Tünnermann, Andreas

2008-01-01T23:59:59.000Z

349

E-Print Network 3.0 - agent tm208 4-methyl-piperazine-1-carbodithioc...  

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

mercy of ill-intending agent platforms. We have devised Source: Roth, Volker - FX Palo Alto Laboratory Collection: Computer Technologies and Information Sciences 31 Intelligent...

350

Partitioning and Degradation of Triclosan and Formation of Methyl-Triclosan in Water-Sediment Systems  

Science Journals Connector (OSTI)

Adsorption and degradation processes of triclosan (TCS) were studied in the laboratory...K d) varied from 147 to 1,425 mL ?g?1.... The sediment with a higher organic carbon content and a lower pH ...

Xiaolong Huang; Chenxi Wu; Xiong Xiong; Kai Zhang…

2014-08-01T23:59:59.000Z

351

E-Print Network 3.0 - atropine methyl bromide Sample Search Results  

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

environmental significance. For example, the ability to consume ... Source: Goodwin, Kelly D. - Ocean Chemistry Division, Atlantic Oceanographic and Meteorological Laboratory....

352

Growth of Diamond from Atomic Hydrogen and a Supersonic Free Jet of Methyl Radicals  

Science Journals Connector (OSTI)

...18 January 1994 An in Vitro System for Adhesion and Fusion of Maize Gametes J.-E. Faure, C. Digonnet...male-female gamete pairs and results in 80 percent fusion, whereas fusions with other combinations of gametic and mesophyllic...

Szetsen Steven Lee; David W. Minsek; Daniel J. Vestyck; Peter Chen

1994-03-18T23:59:59.000Z

353

Contribution of Iron-Reducing Bacteria to Mercury Methylation in Marine Sediments  

E-Print Network (OSTI)

in continental margin sediments off central Chile. Limnologyof microbial iron reduction in sediments of the Baltic-Northreducing bacteria from sediments of an acid stressed lake.

Fleming, Emily J.; Nelson, D C

2006-01-01T23:59:59.000Z

354

Methanol and methyl fuel catalysts. Final technical report, September 1978-August 1980  

SciTech Connect

The Cu/ZnO methanol synthesis catalysts were investigated for (1) the role of additives such as alumina, ceria, and lanthana, (2) the effect of carbon dioxide in the H/sub 2//CO synthesis gas, (3) the chemisorption of hydrogen and carbon monoxide on the catalysts, and (4) the chemical poisoning of the catalysts by sulfur- and chlorine-containing compounds. Maximum activity and selectivity were obtained with a binary catalyst having a composition of Cu/ZnO = 30/70 metal atomic percent and with a synthesis gas of H/sub 2//CO/CO/sub 2/ = 70/28/2 volume percent in the absence of strongly reducing or strongly oxidizing chemical poisons. Both the binary and the ternary catalysts were fully characterized by scanning transmission electron microscopy (STEM), X-ray diffraction, electron spectroscopy, diffuse reflectance spectroscopy, and surface area-pore distribution measurements. Structural and morphologic information is presented in this report in detail for very active Cu/ZnO/Al/sub 2/O/sub 3/ catalysts prepared from acetates and for other catalysts in which the third component caused a loss of activity.

Klier, K.; Herman, R.G.

1980-12-15T23:59:59.000Z

355

Elucidating the Process of Activation of Methyl-Coenzyme M Reductase  

Science Journals Connector (OSTI)

...presented. INTRODUCTION The highest heat of combustion per mass unit (55.7 kJ/g) among all the hydrocarbons makes methane an important source...This decrease was probably due to heat instability of the enzyme. In...

Divya Prakash; Yonnie Wu; Sang-Jin Suh; Evert C. Duin

2014-04-25T23:59:59.000Z

356

DNA methylation dynamics, metabolic fluxes, gene splicing, and alternative phenotypes in honey bees  

Science Journals Connector (OSTI)

...manifested by the lack or presence of entire organs such as wax glands, or leg baskets in one caste. We compared a battery of several...Sequencing data were pro-cessed first by the Illumina Data Analysis Pipeline, and then bisulfite-converted sequencing reads were aligned...

Sylvain Foret; Robert Kucharski; Matteo Pellegrini; Suhua Feng; Steven E. Jacobsen; Gene E. Robinson; Ryszard Maleszka

2012-01-01T23:59:59.000Z

357

Production of low ash coal by thermal extraction with N-methyl-2-pyrrolidinone  

Science Journals Connector (OSTI)

Present study was conducted for the purpose of producing low ash coal from LRC (low rank coals) such as lignite and sub-bituminous coal through thermal extraction using polar solvent. Extraction from bituminous coal

Sang Do Kim; Kwang Jae Woo; Soon Kwan Jeong…

2008-07-01T23:59:59.000Z

358

Studying Nucleosome Positioning, DNA Methylation, and Other Epigenetic Factors Using Genomic Approaches  

E-Print Network (OSTI)

ecotypes, and 2 to 5% in F1 plants. Epimutation clusters arethe corresponding parental and F1 chromosomes. Results andNPB) and 93-11, as well as the F1 hybrids resulting from

Chodavarapu, Ramakrishna Kant

2012-01-01T23:59:59.000Z

359

Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide  

E-Print Network (OSTI)

Global sea-to-air flux climatology Ko, M. K. W. , Poulet,Global sea-to-air flux climatology Vogt, R. , Sander, R. ,sea-to-air flux climatology for bromoform, dibromomethane

2013-01-01T23:59:59.000Z

360

Discovery of Novel Targets for Aberrant Methylation in Pancreatic Carcinoma Using High-Throughput Microarrays  

Science Journals Connector (OSTI)

...Microarrays 1 Norihiro Sato Noriyoshi Fukushima Anirban Maitra Hiroyuki Matsubayashi...5-CTCTGTTTAGCACTGATAATG-3 (forward) and 5-TTTATTAGACTTGAGCTGATTC-3...5-CGGGAGATCAAGCAGAATG-3 (forward) and 5-AACGGCCTCGTTGTACTTG-3...61: 8540-8546, 2001. 5 Fukushima N., Sato N., Ueki T...

Norihiro Sato; Noriyoshi Fukushima; Anirban Maitra; Hiroyuki Matsubayashi; Charles J. Yeo; John L. Cameron; Ralph H. Hruban; and Michael Goggins

2003-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Transesterification of rubber seed oil by sonication technique for the production of methyl esters  

Science Journals Connector (OSTI)

The research and development activities in several countries on this subject have been mostly on sunflower, safflor, soybean, rapeseed and peanut among others; most of these being edible in Indian context. Thus, ...

S. Nivetha Ragavan; D. Vetha Roy

2011-07-01T23:59:59.000Z

362

Elevated Transcriptional Complexity and Decrease in Enzymatic DNA Methylation in Cells Treated with l-Ethionine  

Science Journals Connector (OSTI)

...1). Nonidet P-40 (Shell Oil Co., Frankfurt, GermanFederal...reactions were terminated by heating to 65 for 5 min and the addition...DNA was thermally denatured by heating to 98 in a water bath for 15...8. Christman. J. K., Price, P., Pedrinan, L., and...

Thomas L. J. Boehm and Dusan Drahovsky

1981-10-01T23:59:59.000Z

363

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters...  

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

500 600 700 800 900 1000 300 320 340 360 380 400 420 Apparent Heat Release Rate (kJDeg) Bulk Cylinder Gas Temperature (K) CA (Deg) -0.01 0.01 0.03 0.05 0.07 0.09 0.11 50 250 450...

364

Elucidating the Process of Activation of Methyl-Coenzyme M Reductase  

Science Journals Connector (OSTI)

...It is not clear how these make up the whole protein complex...electrons, however, can be used to reduce polyferredoxin (Em = 500 mV...however, would not be enough to reduce the Ni in MCR. The next step...has been shown to be able to reduce the polyferredoxin (34, 35...

Divya Prakash; Yonnie Wu; Sang-Jin Suh; Evert C. Duin

2014-04-25T23:59:59.000Z

365

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

366

Usage of Fuel Mixtures Containing Ethanol and Rapeseed Oil Methyl Esters in a Diesel Engine  

Science Journals Connector (OSTI)

However, its use in the diesel engine cycle is hampered by the poor motor-fueling characteristics of lower alcohols and, primarily, the limited solubility of ethanol in fossil diesel fuel and its low self-ignition characteristics. ... Coefficient ? = Gair/(GfL0) estimates air supply into a diesel engine cylinder (indicator process), taking into account the differences of stoichiometric ratio L0 of the tested fuels, caused by the increase of the E portion in the RME?E mixture (Gair is air consumption, and Gf is fuel consumption). ... Future research will concentrate on the analysis of fuel injection and heat release rate characteristics in a cylinder, while a diesel engine is running on biodiesel fuels RME?E, and also on the operational parameters of diesel engines when fossil diesel fuel is replaced with three-component fuels D?RME?E. ...

Sergejus Lebedevas; Galina Lebedeva; Violeta Makareviciene; Prutenis Janulis; Egle Sendzikiene

2008-11-12T23:59:59.000Z

367

A circadian rhythm in the susceptibility of the boll weevil, Anthonomus grandis Boheman to methyl parathion  

E-Print Network (OSTI)

. A similar light sensitive rhythm was described in the phototactic response of the unicellular organism F~l 6 ttt (9 d Pitt d lgh, 19 6). 2. Circadian ~rh ms in plants. T' he earliest circadian rhythms observed in organisms were rhythmic movements...

Cole, Charles L

2012-06-07T23:59:59.000Z

368

Thermochemistry of radicals formed by hydrogen abstraction from 1-butanol, 2-methyl-1-propanol, and butanal  

E-Print Network (OSTI)

and alternative-fuel com- bustion, where they are important as intermediates. Therefore reliable prediction with sparsely available group additivity data, and trends in enthalpy and free energy as a function of radical center are discussed for the isomeric radicals. © 2012 American Institute of Physics. [http

Truhlar, Donald G

369

Batch Effects and Pathway Analysis: Two Potential Perils in Cancer Studies Involving DNA Methylation Array Analysis  

Science Journals Connector (OSTI)

...dry ice, first to Dhaka by car, then to Columbia University...members of the first having water As concentrations between 50...members of the second having water As concentrations over 100 mug...if they are not aware of the power of batch effects, they may...

Kristin N. Harper; Brandilyn A. Peters; and Mary V. Gamble

2013-06-01T23:59:59.000Z

370

Analysis of DNA Methylation in Bowel Lavage Fluid for Detection of Colorectal Cancer  

Science Journals Connector (OSTI)

...system was then validated in an independent test set (n = 153; AUC = 0.808). No significant...have shown that the fecal occult blood test (FOBT) is a highly cost-effective screening...immunochemical FOBT (iFOBT or Fecal Immunochemical Test, FIT) has been improved (2, 3 ) and...

Taku Harada; Eiichiro Yamamoto; Hiro-o Yamano; Masanori Nojima; Reo Maruyama; Kohei Kumegawa; Masami Ashida; Kenjiro Yoshikawa; Tomoaki Kimura; Eiji Harada; Ryo Takagi; Yoshihito Tanaka; Hironori Aoki; Masayo Nishizono; Michiko Nakaoka; Akihiro Tsuyada; Takeshi Niinuma; Masahiro Kai; Kazuya Shimoda; Yasuhisa Shinomura; Tamotsu Sugai; Kohzoh Imai; Hiromu Suzuki

2014-10-01T23:59:59.000Z

371

Isolation, Determination of Absolute Stereochemistry, and Asymmetric Synthesis of Insect Methyl-Branched Hydrocarbons  

E-Print Network (OSTI)

z Figure S.2.6: (A) Total ion (TIC) chromatogram of alkanesbrunnea CHC extract, (B) TIC-Chromatogram of MBCH fractionof P. brunnea CHC extract. (C) TIC-chromatogram of 3-MeC23

Bello, Jan Edgar

2014-01-01T23:59:59.000Z

372

Experimental and Computational Thermochemical Study of 2-and 3-Thiopheneacetic Acid Methyl Esters  

E-Print Network (OSTI)

, biodiagnostics, electronic and optoelectronic devices, and conductive polymers. The present study reports found widespread use in modern drug design,3 biodiagnostics,4 electronic and optoelectronic devices,5

Chickos, James S.

373

Diffusion of 2-methyl-propane (1); 2,2-dimethyl-propane (2)  

Science Journals Connector (OSTI)

This document is part of Subvolume A ‘Gases in Gases, Liquids and their Mixtures’ of Volume 15 ‘Diffusion in Gases, Liquids and Electrolytes’ of Landolt-Börnstein Group IV ‘Physical Chemistry’. It is part of the ...

J. Winkelmann

2007-01-01T23:59:59.000Z

374

Copolymers of 2,5-bis[(4-methoxyphenyl) oxycarbonyl]styrene with Styrene and Methyl  

E-Print Network (OSTI)

YI, XINGHE FAN, XIAOFANG CHEN, XINHUA WAN, QI-FENG ZHOU Department of Polymer Science and Engineering crystalline poly- mers (MJLCPs) in which the mesogenic units are laterally attached to the polymer main chain;including molecular design of novel types of MJLCPs,5­7 synthesis of new rod-coil diblock copolymers8

Wan, Xin-hua

375

Methyl mercury dynamics in a tidal wetland quantified using in situ optical measurements  

E-Print Network (OSTI)

, particle sorption, and random episodic events such as wind storms and precipitation. Correlation significant risks to humans and wildlife as methylmercury (MeHg) is concentrated in aquatic food webs effects on the immune and endocrine systems (Mergler et al. 2007; Tan et al. 2009). In fish and wildlife

Boss, Emmanuel S.

376

E-Print Network 3.0 - abscisic acid methyl Sample Search Results  

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

tuberosum, abscisic acid, after- ripening, dormancy, fluridone, germination, gibberellin, hydrothermal time... in freshly harvested TPS (Spicer and Dionne, 1961; Bamberg and...

377

Beta-Phosphinoethylboranes as Ambiphilic Ligands in Nickel-Methyl Complexes  

E-Print Network (OSTI)

group between the boron and phosphorous (R 2 P- BR' 2 ), andsome interaction between the phosphorous and boron centers.

Fischbach, Andreas

2011-01-01T23:59:59.000Z

378

Experimental study of the oxidation of methyl oleate in a jet-stirred , Mohammed Hichem Hakkaa  

E-Print Network (OSTI)

.1016/j.combustflame.2009.12.008 #12;1. Introduction The interest in the oxidation of biodiesel fuels is increasing because of their use along with conventional diesel fuels in internal combustion engines [1], [2], [3] and [4]. Biodiesel fuels are alternative renewable fuels which are obtained from vegetable oils

Paris-Sud XI, Université de

379

Modeling study of the lowtemperature oxidation of large methyl esters from C11 to C19  

E-Print Network (OSTI)

in biodiesel fuels has been investigated. Models have been developed for these species and then detailed; Biodiesel fuels; Modeling; Oxidation * Corresponding author: Olivier Herbinet Laboratory of Reaction the differences with the combustion of alkanes induced by the ester function. While biodiesel fuels deriving from

Boyer, Edmond

380

Beyond Fatty Acid Methyl Esters: Expanding the Renewable Carbon Profile with Alkenones from Isochrysis sp.  

Science Journals Connector (OSTI)

¶ Department of Botany, Faculty of Science, Alexandria University, Alexandria 21526, Egypt ... (a) Mata, T. M.; Martins, A. A.; Caetano, N. S. Renewable Sustainable Energy Rev. 2010, 14, 217– 232 ...

Gregory W. O’Neil; Catherine A. Carmichael; Tyler J. Goepfert; James M. Fulton; Gerhard Knothe; Connie Pui Ling Lau; Scott R. Lindell; Nagwa G-E. Mohammady; Benjamin A. S. Van Mooy; Christopher M. Reddy

2012-03-12T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Use of advanced cluster analysis to characterize seafood consumption patterns and methyle mercury exposures among  

E-Print Network (OSTI)

1 N° 2007/14 Use of advanced cluster analysis to characterize seafood consumption patterns. This study provides demonstrates that a global increase in seafood consumption could lead to MeHg exposure exclusively from eating fish and seafood products. Of the organic mercury compounds, MeHg is the most toxic

Paris-Sud XI, Université de

382

CpG Island Methylator Phenotype Associates with Low-Degree Chromosomal Abnormalities in Colorectal Cancer  

Science Journals Connector (OSTI)

...Francis Barany, Department of Microbiology and Immunology, Weill Medical...Affiliations: 1 Department of Microbiology and Immunology, Weill Medical...30730057 (J. Ott), and the Gilbert Family Foundation and the...progression. | Department of Microbiology and Immunology, Weill Medical...

Yu-Wei Cheng; Hanna Pincas; Manny D. Bacolod; Gunter Schemmann; Sarah F. Giardina; Jianmin Huang; Sandra Barral; Kamran Idrees; Sajid A. Khan; Zhaoshi Zeng; Shoshana Rosenberg; Daniel A. Notterman; Jurg Ott; Philip Paty; and Francis Barany

2008-10-01T23:59:59.000Z

383

Sulfate-Reducing Bacteria: Principal Methylators of Mercury in Anoxic Estuarine Sediment  

Science Journals Connector (OSTI)

...D-1408-3-85. 17 to 20% by ignition) was collected at a...tion of the isolate was based on microscopic observations...on lactate. However, based on cell protein, the...CH3Hg+ from Hg2+ in a steam-sterilized anoxic estuarine...vol) inoculum to a steam-sterilized and HgCl2-spiked...

G. C. Compeau; R. Bartha

1985-08-01T23:59:59.000Z

384

Effect of Divalent Metals on Hg(II) Uptake and Methylation by Bacteria  

Science Journals Connector (OSTI)

The production of methylmercury by some bacteria is a key first step in the accumulation and biomagnification of this toxic substance in aquatic food webs, a major human health concern. By direct measurement of cellular Hg(II) uptake in model iron and ...

Jeffra K. Schaefer; Aleksandra Szczuka; François M. M. Morel

2014-02-10T23:59:59.000Z

385

Interplant communication: airborne methyl jasmonate induces synthesis of proteinase inhibitors in plant leaves.  

Science Journals Connector (OSTI)

...regulate the synthesis of these inhibitors in response to herbivore attacks and have found that the inhibitor genes are induced by oligosaccharide...ronides) and pathogen (chitosan) cell walls (3). The mecha...activate the pro- teinase inhibitor genes is not known, but oligosaccharide...

E E Farmer; C A Ryan

1990-01-01T23:59:59.000Z

386

Recent trends in atmospheric methyl bromide: analysis of post-Montreal Protocol variability  

E-Print Network (OSTI)

2003) caution that their bio- fuel emission estimates couldthe Yevich and Logan (2003) bio- fuel emissions to CH 3 Br

Yvon-Lewis, S. A; Saltzman, E. S; Montzka, S. A

2009-01-01T23:59:59.000Z

387

Inactivation of a DNA Methylation Pathway in Maize Reproductive Organs Results in Apomixis-Like Phenotypes  

Science Journals Connector (OSTI)

...nucleotide groups. In Arabidopsis, where the process is best understood, at least three classes...DMT102 and DMT103 likely act on a common process in the ovule, consistent with their...Hieracium subgenus pilosella are closely interrelated developmental pathways. Plant Cell 15...

Marcelina Garcia-Aguilar; Caroline Michaud; Olivier Leblanc; Daniel Grimanelli

2010-10-29T23:59:59.000Z

388

The Stress Hormone Corticosterone Increases Synaptic -Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid  

E-Print Network (OSTI)

Acid (AMPA) Receptors via Serum- and Glucocorticoid-inducible Kinase (SGK) Regulation of the GDI-Rab4 membrane. Guanosine nucleotide dissociation inhibitor (GDI), which regulates the cycle of Rab proteins. Corticoster- one also triggers an increased GDI phosphorylation at Ser-213 by the serum- and glucocorticoid

Yan, Zhen

389

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

E-Print Network (OSTI)

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

390

Biodegradation of Methyl tert-Butyl Ether by a Pure Bacterial Culture  

Science Journals Connector (OSTI)

...identify cost-effective remediation technologies. Relatively...treated with ENV735 as a remediation biocatalyst, but the strain...through the Small Business Innovative Research program (grant...situ bioaugmentation for remediation of chlorinated solvents in...

Paul B. Hatzinger; Kevin McClay; Simon Vainberg; Marina Tugusheva; Charles W. Condee; Robert J. Steffan

2001-12-01T23:59:59.000Z

391

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

E-Print Network (OSTI)

discharge of organic compounds require that new, innovative tech- nologies and methods of remediation dioxide, making the DMP reactor a promising tool in the future remediation of water. Chemical and physical is transformed into a more toxic material or a substance that is more difficult to remediate, the treatment

Dandy, David

392

Temperature dependence of the vapour tension of methyl-substituted phenol derivatives  

SciTech Connect

Notable among the coking products of coal are phenol and its derivatives, derived for the coal tar and water layer above ht tar. Given that phenol an its derivatives are mainly extracted from coal tar fractions by rectification, information on how the vapor tension of the individual components depends on the temperature is of great importance. For phenol and various substituted alkylphenols there are tabular data. In the pre-computer era these data were sufficient for the separation of phenol mixtures. However, the development and introduction of information technology in the coal industry and in the design process demands the mathematical description of the physicochemical processes of coking products. The temperature dependence of the saturated vapor pressure for organic compounds is commonly described by the Antoine equation.

S.G. Gagarin [Institute of Mineral Fuels (Russian Federation)

2007-05-15T23:59:59.000Z

393

Enhanced photodegradation of methyl orange with TiO nanoparticles using a triboelectric  

E-Print Network (OSTI)

Search Collections Journals About Contact us My IOPscience #12;IOP PUBLISHING NANOTECHNOLOGY% and 27%, respectively. The fabricated TENGs have potential applications in wastewater treatment, water/295401/mmedia (Some figures may appear in colour only in the online journal) 1. Introduction Wastewater

Wang, Zhong L.

394

Another Look at the Decomposition of Methyl Azide and Methanimine:? How Is HCN Formed?  

Science Journals Connector (OSTI)

(18)?(a) Nguyen, M. T.; Rademakers, J.; Martin, J. M. L. Chem. ... Nguyen, Minh Tho; Rademakers, Johan; Martin, Jan M. L. ...

Minh Tho Nguyen; Debasis Sengupta; Tae-Kyu Ha

1996-04-18T23:59:59.000Z

395

A comparative analysis of DNA methylation across human embryonic stem cell lines  

E-Print Network (OSTI)

human embryonic stem cell lines. Genome Biology 2011 12:R62.human embryonic stem cell lines Pao-Yang Chen 1,2 , Suhuaembryonic stem cell (HESC) lines. It had previously been

Chen, Pao-Yang; Feng, Suhua; Joo, Jong; Jacobsen, Steve E; Pellegrini, Matteo

2011-01-01T23:59:59.000Z

396

free energy of desolvation for the larger neo-pentyl system relative to the methyl chloride  

E-Print Network (OSTI)

and ex- plains the difference seen between gas-phase and solution-phase experimental results for the SN2 to the energy of the steric effect. Another choice for the measure of the steric effect ( E*), the SN2 barrier reaction. References and Notes 1. A. W. Hofmann, Ber. Dtsch. Chem. Ges. 5, 704 (1872). 2. , Ber. Dtsch

Saffman, Mark

397

Frontside versus backside reactivity in electron transfer to oriented tert butyl bromide and methyl bromide  

E-Print Network (OSTI)

by bimolecular nucleophilic substitution (SN2) reactions, such as Cl CH3BrClCH3 Br . 1 These reactions proceedH9Br. © 2002 American Institute of Physics. DOI: 10.1063/1.1496477 I. INTRODUCTION Chemical reaction decreases the reaction rate by orders of magnitude because the larger CH3 groups impede the inversion

Brooks, Philip R.

398

Anomalous Properties of Poly(methyl methacrylate) Thin Films in Supercritical Carbon Dioxide  

Science Journals Connector (OSTI)

The PMMA swelling isotherms are insensitive to changing the substrate from silicon to gallium arsenide. ... The wafers were then rinsed with voluminous amounts of deionized water (NANOpureII, Barnstead) and then dried with nitrogen gas (Matheson Gas Products, >99.999%). ... The solubility of CO2 in the polymer film may be expected to decrease as the compressibility increases. ...

S. M. Sirard; K. J. Ziegler; I. C. Sanchez; P. F. Green; K. P. Johnston

2002-02-01T23:59:59.000Z

399

Multivitamins, Folate, and Green Vegetables Protect against Gene Promoter Methylation in the Aerodigestive Tract of Smokers  

Science Journals Connector (OSTI)

...2425 Ridgecrest Drive Southeast, Albuquerque...Harvard Food Frequency Questionnaire...and 21 dietary variables hypothesized...38 composite variables using the food frequency questionnaire...these composite variables, red and processed...

Christine A. Stidley; Maria A. Picchi; Shuguang Leng; Randy Willink; Richard E. Crowell; Kristina G. Flores; Huining Kang; Tim Byers; Frank D. Gilliland; and Steven A. Belinsky

2010-01-15T23:59:59.000Z

400

Combustion chemical kinetics of biodiesel and related compounds (methyl and ethyl esters): Experiments and  

E-Print Network (OSTI)

energy resource that has been consumed by the world's population, exceeding natural gas, coal, nuclear a shift toward alternative sources of energy that are renewable, sustainable, efficient, cost Industries Chimiques de Nancy, Laboratoire Réactions et Génie des Procédés, UMR CNRS 7274, 1 rue Grandville

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Methyl bromide in preindustrial air: Measurements from an Antarctic ice core  

E-Print Network (OSTI)

with estimates of the impact of anthropogenic activity (fumigation, combustion, and biomass burning. A preindustrial scenario assuming no fumigation, no combustion, and a 75% reduction in biomass-burning sources

Saltzman, Eric

402

Evaluation of radiation-induced myocardial damage using iodine-123 ?-methyl-iodophenyl pentadecanoic acid scintigraphy  

Science Journals Connector (OSTI)

......short follow-up period after completion of RT for cardiac dysfunction...most useful as a prognostic index for RT-induced cardiac events...has become a widely accepted index of heart failure or heart remodeling...The median interval from completion of RT to I-123 BMIPP scintigraphy......

Rei Umezawa; Kei Takase; Keiichi Jingu; Kentaro Takanami; Hideki Ota; Tomohiro Kaneta; Ken Takeda; Haruo Matsushita; Hisanori Ariga; Shoki Takahashi; Shogo Yamada

2013-09-01T23:59:59.000Z

403

Coniferyl aldehyde 5-hydroxylation and methylation direct syringyl lignin biosynthesis in angiosperms  

Science Journals Connector (OSTI)

...Reaction , eds Sarkanen K V Ludwig C H ( Wiley Interscience , New York ), pp 639 – 694 . 3 Chang H M Sarkanen K V ( 1973 ) Tappi 56 : 132 – 136 . 4 Chiang V L Funaoka M ( 1990 ) Holzforschung 44 : 309 – 313 . 5 Higuchi T Brown S A ( 1963 ) Can J Biochem...

Keishi Osakabe; Cheng Chung Tsao; Laigeng Li; Jacqueline L. Popko; Toshiaki Umezawa; Daniel T. Carraway; Richard H. Smeltzer; Chandrashekhar P. Joshi; Vincent L. Chiang

1999-01-01T23:59:59.000Z

404

Extended Summaries: IUPAC Conference glyphosate, AMPA, and N-methylAMPA  

E-Print Network (OSTI)

and Sue Hayes 2 1 Zeneca Ag Products , 1200 S 47th Street, Richmond, CA 94804, USA 2 Zeneca Agrochemicals

Zhang, Minghua

405

Histone H2A.Z and DNA methylation are mutually antagonistic chromatin marks  

E-Print Network (OSTI)

4,5 , engenders opposite changes (gains and losses) in H2A.Z deposition, whereas mutation of the PIE

406

Metal carbonyl-hydrosilane reactions and hydrosilation catalysis. Final report for period May 1, 1995 - August 14, 1999  

SciTech Connect

Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a doxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(CO){sub 4}MnR [L = CO, PPh{sub 3}; R = COCH{sub 3}, COPh, CH{sub 3}] and (b) halides (CO){sub 5}MnX and [(CO){sub 4}MnX]{sub 2} (X = Br, I). The former promote hydrosilation and deoxygenation catalysis; the latter promote dehydrogenative silation of alcohols and carboxylic acids as well as hydrosilation and deoxygenation of some metallocarboxylic acid derivatives. In every case studied, these Mn precatalysts are far more reactive or selective than traditional Rh(l) precatalysts. The reaction chemistry of the above and other Mn alkyl complexes with hydrosilanes was studied in order to probe catalysis mechanism(s). Thus, Mn(CO){sub 5} methyl, benzyl, acetyl, and benzoyl (4 p-substituents) complexes reacted with hydrosilines by four different mechanisms, which were established. A noteworthy development was that the methyl and benzoyl complexes gave moderate yields of a new ({eta}{sup 2}-Si-H) silane adduct (CO){sub 4}Mn(SiMe{sub 2}Ph)(H-SiMe{sub 2}Ph), which is stable in the presence of excess silane. This silane adduct promotes all three catalytic reactions; its extraordinary activity and potential selectivity are under study.

Cutler, Alan R.

2001-04-14T23:59:59.000Z

407

Mesoporous tantalum oxide as catalyst for dehydration of glucose to 5-hydroxymethylfurfural  

Science Journals Connector (OSTI)

Abstract Mesoporous tantalum oxide was prepared by acid hydrolysis of tantalum penta-ethoxide in the presence of a triblock co-polymer Pluronic L-121, a non-ionic surfactant, at room temperature and subsequent calcination at 550 °C for 6 h. This solid exhibits a suitable specific surface area (79 m2 g?1) and a high acidity (353 ?mol NH3 g?1) with the presence of both Brönsted and Lewis acid sites, demonstrating to be active as solid acid catalyst in the dehydration of glucose to 5-hydroxymethylfurfural (HMF), in a biphasic water/methyl-iso-butyl ketone (MIBK) system. Thus, by using a glucose:catalyst weight ratio of 3:1, a glucose conversion of 69% and a HMF yield of 23% were achieved at 175 °C, and after only 90 min of reaction time. The catalytic process is selective toward HMF, which is preserved from ulterior hydration to levulinic acid. Fructose was also detected as by-product of glucose isomerisation with 14% of selectivity. The catalyst is very stable, since no leaching of tantalum species to the liquid phase was found; moreover, the catalytic performance of this acid solid is well recovered after calcination at 550 °C for 2 h.

I. Jiménez-Morales; M. Moreno-Recio; J. Santamaría-González; P. Maireles-Torres; A. Jiménez-López

2014-01-01T23:59:59.000Z

408

A novel Whole Air Sample Profiler (WASP) for the quantification of volatile organic compounds in the boundary layer  

SciTech Connect

The emission and fate of reactive VOCs is of inherent interest to those studying chemical biosphere-atmosphere interactions. In-canopy VOC observations are obtainable using tower-based samplers, but the lack of suitable sampling systems for the full boundary 5 layer has limited the data characterizing the vertical structure of such gases above the canopy height and still in the boundary layer. This is the important region where many reactive VOCs are oxidized or otherwise removed. Here we describe an airborne sampling system designed to collect a vertical profile of air into a 3/800 OD tube 150m in length. The inlet ram air pressure is used to flow sampled air through the 10 tube, which results in a varying flow rate based on aircraft speed and altitude. Since aircraft velocity decreases during ascent, it is necessary to account for the variable flow rate into the tube. This is accomplished using a reference gas that is pulsed into the air stream so that the precise altitude of the collected air can be reconstructed post-collection. The pulsed injections are also used to determine any significant effect 15 from diffusion/mixing within the sampling tube, either during collection or subsequent extraction for gas analysis. This system has been successfully deployed, and we show some measured vertical profiles of isoprene and its oxidation products methacrolein and methyl vinyl ketone from a mixed canopy near Columbia, Missouri.

Mak, J. E.; Su, L.; Guenther, Alex B.; Karl, Thomas G.

2013-10-16T23:59:59.000Z

409

Isobutanol-methanol mixtures from synthesis gas. Quarterly technical progress report, 1 January--31 March 1996  

SciTech Connect

A series of CuMgCeO{sub x} catalysts have been prepared. Range of Cu dispersion, determined by N{sub 2}O titration, was 19-48% and are among the highest reported in the literature for Cu-based methanol and higher alcohol synthesis catalysts. Kinetics of MeOH and EtOH coupling reactions on Cu/ZnO and K-Cu/MgO/CeO{sub 2} catalysts indicate that Cu promotes alcohol dehydrogenation. Acetaldehyde is a reactive intermediate. High-pressure isobutanol synthesis studies have been carried out on K- and Cs-promoted Cu/MgO/CeO{sub 2} catalysts. The K promoter is more active than Cs for CO conversion, but the Cs promoter activates the C{sub 1} to C{sub 2} step more effectively. Catalysts with high alkali loading resulted in low conversions. Temperature programmed surface reaction studies of MeOH, EtOH, and acetaldehyde on MgO/CeO{sub 2}-based Cu catalysts show evolution of acetone, crotonaldehyde, methyl ethyl ketone, H2, carbon oxides. Neither EtOH nor acetaldehyde produces propionaldehyde or 1- propanol, suggesting that these C{sub 3} species can only form via reactions involving C{sub 1} and C{sub 2} oxygenate species.

NONE

1996-04-20T23:59:59.000Z

410

Effect of organic-vapor mixtures on the service life of respirator cartridges. Part 1  

SciTech Connect

We challenged pairs of MSA respirator cartridges with two compounds, isopropyl alcohol (IPA) and methyl ethyl ketone (MEK), to study the adsorption characteristics of organic vapors on cartridge performance. Each vapor was injected at three concentrations: (1) each at 10 times the respective Threshold Limit Value (TLV), (2) as a mixture at a concentration equal to the sum of the two single concentrations of item (1), and (3) each alone at a concentration equal to the total-mixture challenge concentration of item (2). The experiments were repeated at 20% and 85% relative humidities. One-percent and ten-percent breakthrough times were observed experimentally in every case, and breakthrough times of the mixture agreed with the single, high-concentration challenge. Experimental data were matched to a theoretical model derived from modified Wheeler-Robell equations and showed close correlations between adsorption-rate constants for the mixture and for the individual compounds. Based on these first experiments, we feel that an accurate mathematical model is possible, and further experiments are planned to verify this. 12 refs., 1 fig., 3 tabs.

Swearengen, P.M.; Weaver, S.C.

1985-01-01T23:59:59.000Z

411

VOC recovery using microwave regeneration of adsorbents: Pilot-column studies  

SciTech Connect

A pilot-scale column was constructed to evaluate the technical feasibility of microwave (MW) heating as a means of regenerating adsorbents for recovery of volatile organic compounds (VOCs). The 6 inch diameter moving-bed column, which has a throughput capacity of 200 lb/hr of adsorbent, is representative of a full-scale component of a small-capacity recovery system or a single element of a large-capacity system. Regeneration experiments were conducted to study the effects of key process variables, including adsorbent and stripping gas feed rates, initial adsorbent coverage and microwave power input, on column performance. Two adsorbents with contrasting dielectric loss characteristics were studied, Dowex Optipore L502 (low dielectric loss styrene-based) and Rohm and Haas Ambersorb 600 (moderate dielectric loss carbonaceous). Adsorbates included polar and nonpolar compounds: isopropyl alcohol (iPA), methyl ethyl ketone (MEK) and toluene. Solvent recovery rates of 20--30 lbs/hr were achieved. The results of the pilot-column experiments demonstrate that axial temperature and desorption profiles are dependent on the dielectric characteristics of the adsorbent/sorbate pair, and that final regeneration coverage can be correlated with a dimensionless stripping gas ratio and final adsorbent temperature. Implications for design of microwave-regenerated VOC recovery systems are discussed.

Salinas, M.J.; Price, D.W.; Schmidt, P.S.

1999-07-01T23:59:59.000Z

413

Membrane proteomic analysis of pancreatic cancer cells  

E-Print Network (OSTI)

and amino acids, protein folding/ unfolded protein response,ER regulation of protein folding 8.98 Ketone body metabolismcatabolic process; protein folding/transport; response to

Liu, Xiaojun; Zhang, Min; Go, Vay Liang W; Hu, Shen

2010-01-01T23:59:59.000Z

414

Homo-cysteinyl peptide inhibitors of the L1 metallo-b-lactamase, and SAR as determined by combinatorial library synthesis  

E-Print Network (OSTI)

alcohol and ketone,3 hydroxamate,4 phen- azines,5 thioesters,6­9 biphenyl tetrazoles,10,11 thiols,9,12­ 17

Geysen, Mario

415

Continuous production of chiral 1,3-butanediol using immobilized biocatalysts in a packed bed reactor: promising biocatalysis method with an asymmetric hydrogen-transfer bioreduction  

Science Journals Connector (OSTI)

An asymmetric hydrogen-transfer biocatalyst consisting of mutated Rhodococcus phenylacetaldehyde reductase (PAR) or Leifsonia alcohol dehydrogenase (LSADH) was applied for some water-soluble ketone substrates. Am...

Nobuya Itoh; Masatoshi Nakamura; Kousuke Inoue…

2007-07-01T23:59:59.000Z

416

CHEM 3311, Fall 2010 Professor Walba  

E-Print Network (OSTI)

of overlap of hybrid atomic orbitals (e.g. Csp3­H1s). Put your answer in the box to the right: ___________________________________________ Page 2 of 6 Csp3 ­ Csp3 #12;2) (20 pts) The structure of isobutyl thiol is given in the box

Walba, David

417

ON THE FORMATION OF GLYCOLALDEHYDE (HCOCH2OH) AND METHYL FORMATE (HCOOCH3) IN INTERSTELLAR ICE ANALOGS  

E-Print Network (OSTI)

ANALOGS Chris J. Bennett and Ralf I. Kaiser Department of Chemistry, University of Hawaii at ManoaĂ?1 . Mass spectrometer signals during the warm-up of the ice sample showed sublimation of both cannot be accounted for solely by gas-phase chemistry. Subject headinggs: cosmic rays -- ISM: molecules

Kaiser, Ralf I.

418

Influence of Methylation on the Antibacterial Properties of Triclosan in Pasteurella multocida and Pseudomonas aeruginosa Variant Strains.  

E-Print Network (OSTI)

??The opportunistic bacterium Pasteurella multocida is extremely susceptible to the hydrophobic biocide triclosan by virtue of its markedly permeable outer membrane, while the opportunistic pathogen… (more)

Clayborn, Ashton B.

2011-01-01T23:59:59.000Z

419

Bioconcentration of Triclosan, Methyl-Triclosan, and Triclocarban in the Plants and Sediments of a Constructed Wetland.  

E-Print Network (OSTI)

??Triclosan and triclocarban are antimicrobial compounds added to a variety of consumer products that are commonly detected in waste water effluent. The focus of this… (more)

Zarate, Frederick M., Jr.

2011-01-01T23:59:59.000Z

420

BSCTV C2 Attenuates the Degradation of SAMDC1 to Suppress DNA Methylation-Mediated Gene Silencing in Arabidopsis  

Science Journals Connector (OSTI)

...beta-galactosidase activity using a filter-lift assay (Breeden and Nasmyth...concentration of OD600 = 1.5. Four different combinations of A. tumefaciens were infiltrated into four different positions at the same...remaining in each sampling time point; Ct, the quantified content...

Zhonghui Zhang; Hao Chen; Xiahe Huang; Ran Xia; Qingzhen Zhao; Jianbin Lai; Kunling Teng; Yin Li; Liming Liang; Quansheng Du; Xueping Zhou; Huishan Guo; Qi Xie

2011-01-18T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Excess Weight Gain Accelerates 1-Methyl-1-Nitrosourea–Induced Mammary Carcinogenesis in a Rat Model of Premenopausal Breast Cancer  

Science Journals Connector (OSTI)

...American Institute for Cancer Research [Internet]. Washington, D.C. [updated 11-1-0007...National Institutes of Health (NIH) [Internet]. Bethesda, MD [updated 10-1-2012...Wallace TM , Levy JC, Matthews DR.Use and abuse of HOMA modeling.Diabetes Care 2004...

Shawna B. Matthews; Zongjian Zhu; Weiqin Jiang; John N. McGinley; Elizabeth S. Neil; and Henry J. Thompson

2014-03-01T23:59:59.000Z

422

Structural Identification and Biological Activity of 7-Methyl-10,11-Ethylenedioxy-20(S)-Camptothecin, a Photodegradant of Lurtotecan  

Science Journals Connector (OSTI)

...compound in the plasma of patients treated...Bruker AM-300 (300 MHz, FT) spectrometer...in a humidified atmosphere in 5% CO2 in media...photodegradation in plasma, urine and cell...chromatography/atmospheric pressure chemical...was observed in plasma samples of patients...

Walter J. Loos; Jaap Verweij; Diederik F. S. Kehrer; Peter de Bruijn; Franciscus M. H. de Groot; Marta Hamilton; Kees Nooter; Gerrit Stoter; and Alex Sparreboom

2002-03-01T23:59:59.000Z

423

Biodegradation of Methyl tert-Butyl Ether and Other Fuel Oxygenates by a New Strain, Mycobacterium austroafricanum IFP 2012  

Science Journals Connector (OSTI)

...and the O2 consumption rate was measured with a 12-mm...France). The measured rates were corrected for endogenous...Cells were broken by three passes through a French press...from 105 to 200C at a rate of 10C/min. Helium...flushed with a Spectra-Physics SCM 400 vacuum flusher...

Alan François; Hugues Mathis; Davy Godefroy; Pascal Piveteau; Françoise Fayolle; Frédéric Monot

2002-06-01T23:59:59.000Z

424

Structural and biochemical insights into 2?-O-methylation at the 3?-terminal nucleotide of RNA by Hen1  

Science Journals Connector (OSTI)

...AvHen1-Cn, respectively, due to a nick introduced in the...sites were found with figure of merit (FOM...is made possible due to the nick in the insertion domain by...Method MR SAD MR MR Figure of merit 0.36 Refinement Resolution...

Chio Mui Chan; Chun Zhou; Joseph S. Brunzelle; Raven H. Huang

2009-01-01T23:59:59.000Z

425

Methyl mercaptan and dimethyl disulfide production from methionine by Proteus species detected by head-space gas-liquid chromatography.  

Science Journals Connector (OSTI)

...spectra with a reference library file (8). This identification...neither pure sam- ple nor library spectrum was available...comparison of head- space sampling with direct...Shigella Centre, Central Public Health Laboratory, London...chromatographic analysis of head-space gas of dilute aqueous...

N J Hayward; T H Jeavons; A J Nicholson; A G Thornton

1977-09-01T23:59:59.000Z

426

Yields of ?-hydroxynitrates, dihydroxynitrates, and trihydroxynitrates formed from OH radical-initiated reactions of 2-methyl-1-alkenes  

Science Journals Connector (OSTI)

...25 °C) and atmospheric pressure. The chamber...evaporation–condensation apparatus were added...spiking indicated recovery was 90–100...elution by using water and acetonitrile...Arey J ( 2003 ) Atmospheric degradation of volatile...The Mechanisms of Atmospheric Oxidation of the...

Aiko Matsunaga; Paul J. Ziemann

2010-01-01T23:59:59.000Z

427

Production of Hydroxyl-free Radical by Reaction of Hydrogen Peroxide with N-Methyl-N?-nitro-N-nitrosoguanidine  

Science Journals Connector (OSTI)

...by reaction of hydrogen peroxide (H2O2...resulted in -OH production. INTRODUCTION...MATERIALS AND METHODS Production of -OH...formation from hydrogen peroxide by ferrous...Statistical Methods,pp. 100-106...derived from hydrogen peroxide in lignin...mechanismfor the production of ethylene from...

Tomiko Mikuni; Masaharu Tatsuta; and Mikiharu Kamachi

1985-12-01T23:59:59.000Z

428

Experimental and Computational Study of the Kinetics of OH + Pyridine and Its Methyl-and Ethyl-Substituted Derivatives  

E-Print Network (OSTI)

remains somewhat uncertain; however, these compounds have been observed as products of coal combustion5-Substituted Derivatives Laurence Y. Yeung and Matthew J. Elrod* Department of Chemistry, Oberlin College, Oberlin, Ohio in some respects, the authors noted that the lack of knowledge concerning the ion-molecule chemistry

Elrod, Matthew J.

429

The effect of methyl silicone upon feedlot performance digestibility of nutrients and prevention of bloat in beef cattle  

E-Print Network (OSTI)

, , $45: g", ''. ' %$ ''-;:k ' '5y@l. . '-'. ' 7%, :;; i 9'~8 ' "', '. WAG "?' '. " '5N ' "" 4 ' F33'. '. ;p. 3~M t ' W':, - ~ 5 . 85, '. . f " fj~9. %59: i; . SORY: '. "'. . 's". ''. ' . . . 596'- -='&:. m9 ;, . %XV, :. , '-'4-' ? "-' Hi...'". ~~:: . ' -, " '. ";:;:=::, '-:l -:-. . -. ":-~M. 'mal %hi'6ex4 mr@ 'af ay&~ Xmke ecame t'o ~ I 4 I '. . . '. , ' ': -. , : 4W~ '~f8''M 4Q 9gl '@8 '1 d'?t"~g pQL+~ OX 'F5~%~CI':4M ?k4~'p". 4V)X'M+ 45' C& -, "' . --, ::. ceop-~q". . :8aui~ WW @re me%4ek . yZti', x...

Wythe, Landon Douglas

2012-06-07T23:59:59.000Z

430

Methyl p-Hydroxyphenyllactate and Nuclear Type II Binding Sites in Malignant Cells: Metabolic Fate and Mammary Tumor Growth  

Science Journals Connector (OSTI)

...Heterogeneity of estrogen-binding sites and the nuclear matrix. In: G. Maul (ed.). The Nuclear Matrix and the Nuclear Envelope, pp. 259-269. New York...inhibition on mitochondria! ATPase and energy-linked reactions in submitochondrial...

Barry M. Markaverich; Rebecca R. Gregory; MaryAnn Alejandro; Francis S. Kittrell; Daniel Medina; James H. Clark; Manju Varma; and Rajender S. Varma

1990-03-01T23:59:59.000Z

431

Discovery and Characterization of a Novel Dihydroisoxazole Class of ?-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) Receptor Potentiators  

Science Journals Connector (OSTI)

We are also grateful to Dr. Russell Dushin and Dr. Katherine Brighty for their review and helpful suggestions in preparing this manuscript. ... Zarrinmayeh, H.; Bleakman, D.; Gates, M. R.; Yu, H.; Zimmerman, D. M.; Ornstein, P. L.; McKennon, T.; Arnold, M. B.; Wheeler, W. J.; Skolnick, P.[3H]N-2-(4-(N-benzamido)phenyl)propyl-2- propanesulfonamide: a novel AMPA receptor potentiator and radioligand J. Med. ...

Nandini C. Patel; Jacob Schwarz; Xinjun J. Hou; Dennis J. Hoover; Longfei Xie; Anton J. Fliri; Randall J. Gallaschun; John T. Lazzaro; Dianne K. Bryce; William E. Hoffmann; Ashley N. Hanks; Dina McGinnis; Eric S. Marr; Justin L. Gazard; Mihály Hajós; Renato J. Scialis; Raymond S. Hurst; Christopher L. Shaffer; Jayvardhan Pandit; Christopher J. O’Donnell

2013-11-11T23:59:59.000Z

432

Biochemical Changes During Fungal Sporulation and Spore Germination: I. Phenyl Methyl Sulfonyl Fluoride Inhibition of Macroconidial Germination in Microsporum gypseum  

Science Journals Connector (OSTI)

...agent. The germination of Bacillus spores was inhibited 190...alkaline protease of B. subtilis (2). It is interesting that the B. subtilis alkaline protease was...transformable strain of Bacillus subtilis. Arch. Biochem. Biophys...

T. J. Leighton; J. J. Stock

1970-03-01T23:59:59.000Z

433

Combustion and emission characteristics of diesel engine fuelled with methyl esters of pungam oil and rice bran oil  

Science Journals Connector (OSTI)

Biodiesel derived from vegetable oils and animal fats can be used in diesel engines with little or no modifications. In this work, the combustion, performance and emission characteristics of various biodiesel (rice bran oil and pungam oil) and their blends are evaluated in a direct injection diesel engine. Lower ignition delay, higher peak pressure and heat release rate with almost same brake thermal efficiency are obtained for 20% biodiesel blend as compared with diesel fuel. They exhibited lower unburned hydrocarbon, carbon monoxide and soot emissions with a penalty of higher NOx emissions.

G. Lakshmi Narayana Rao; N. Nallusamy; S. Sampath; K. Rajagopal

2008-01-01T23:59:59.000Z

434

Growth and response of whitebrush to 2-methyl-4-chlorophenoxyacetic acid as conditioned by available soil moisture  

E-Print Network (OSTI)

S ......................................... 10 R E S U L T S ...................................................... .. lb Periodicity of Plant Growth ........... . ? ? ? ? ? ? ? ? ? 1^ Gross Responses of Nursery Plants .......................... 1^ Trends in Various Constituents at Time... ........................................... .. 19 C a l c i u m ............... .................? ? ? ? ? ? ? 20 M a g n e s i u m ............................ .. 20 B o r o n .................................................. 20 Trends in Various Plant Constituents Following Treatment...

McCully, Wayne Gunter

2013-10-04T23:59:59.000Z

435

Adsorption of As(V), As(III) and methyl arsenic by calcite and the impact of some groundwater species  

E-Print Network (OSTI)

for adsorbed Mg2+ as compared to Ca2+. Phosphate and sulfate were highly competitive with iAsV in adsorption to calcite and both resulted in decreased iAsV adsorption. The total prevention of iAsV adsorption at initial equimolar arsenic/phosphate concentrations...

Jones, Robert Garret

2009-05-15T23:59:59.000Z

436

Structural Identification and Biological Activity of 7-Methyl-10,11-Ethylenedioxy-20(S)-Camptothecin, a Photodegradant of Lurtotecan  

Science Journals Connector (OSTI)

...increase significantly in plasma samples exposed to laboratory...unidentified compound in the plasma of patients treated with...Bruker AM-300 (300 MHz, FT) spectrometer...at 37C in a humidified atmosphere in 5% CO2 in media supplemented...The increase of MEC in plasma and whole blood containing...

Walter J. Loos; Jaap Verweij; Diederik F. S. Kehrer; Peter de Bruijn; Franciscus M. H. de Groot; Marta Hamilton; Kees Nooter; Gerrit Stoter; and Alex Sparreboom

2002-03-01T23:59:59.000Z

437

Effect of nanoclay on the phase separation behavior of poly(methyl methacrylate)/poly(vinyl acetate) binary polymer blends  

Science Journals Connector (OSTI)

The effect of nanoclay on the phase-separation behavior of poly(...T c and delay time t D of isothermal phase-separation also decrease, and the variation amplitude depends on the m...

Ji-shi Zhao; Min Zuo ??; Chao-ying Lin; Qiang Zheng

2014-11-01T23:59:59.000Z

438

The influence of some pterins on the circadian rhythmicity of hydroxyindole-O-methyl transferase in the pineal gland  

E-Print Network (OSTI)

, Utrecht, The Netherlands. #12;However, some data on HIOMT regulation have been put forward in the litera (Fukushima and Nixon, 1979 ; Levine et al., 1979), their involvement in indole metabolism as a cofactor

Paris-Sud XI, Université de

439

Potential role of N-methyl-D-aspartate receptors as executors of neurodegeneration resulting from diverse insults: focus on  

E-Print Network (OSTI)

resulting from diverse insults: focus on memantine Gary L. Wenka , Chris G. Parsonsb and Wojciech Danyszb therapeutic mechanisms underlying the neuroprotective actions of memantine. Behavioural Pharmacology 17

Wenk, Gary

440

Conserved Structural and Functional Control of N-Methyl-D-aspartate Receptor Gating by Transmembrane Domain M3*  

E-Print Network (OSTI)

to pore block by ( )MK-801, ( )MK-801, ketamine, memantine, amantadine, and dex- trorphan. The partial

Traynelis, Stephen F.

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

DNA double-strand breaks promote methylation of histone H3 on lysine 9 and transient formation of repressive chromatin  

Science Journals Connector (OSTI)

...7456 ): 50 – 54 . 11 Price BD D’Andrea AD ( 2013...Y Gursoy-Yuzugullu O Price BD ( 2012 ) The...Apochromat/1.25-N.A. oil objective (Leica...Plan APO 63×/1.4 oil M27 lens (magnification...proteins were released by heating for 5 min with 2× sample...

Marina K. Ayrapetov; Ozge Gursoy-Yuzugullu; Chang Xu; Ye Xu; Brendan D. Price

2014-01-01T23:59:59.000Z

442

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

Science Journals Connector (OSTI)

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

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

2004-02-01T23:59:59.000Z

443

The Carcinogenicity of 3-Methoxy-4-aminoazobenzene and Its N-Methyl Derivatives for Extrahepatic Tissues of the Rat  

Science Journals Connector (OSTI)

...obtained. :Nineteen gm. (0.5 mole) of lithium aluminum hydride was suspended in 400...stirring was continued for 15 minutes. The excess hydride was destroyed by the dropwise addition of 50 ml. of ethyl acetate. The lithium aluminum-dye complex was decomposed...

James A. Miller and Elizabeth C. Miller

1961-09-01T23:59:59.000Z

444

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters in a Motored Engine  

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

The alkyl chain of fatty acid esters experience the typical paraffin-like low temperature oxidation sequence; the alkyl chain length of fatty acid esters has a crucial impact on the ignition behavior of fatty acid esters

445

BRCA1 Promoter Methylation in Sporadic Breast Cancer Is Associated with Reduced BRCA1 Copy Number and Chromosome 17 Aneusomy  

Science Journals Connector (OSTI)

...alterations that overcome these problems and force tumor progression down the same limited...carcinoma. In: Hayat MA, editor. Handbook of immunohistochemistry and in situ hybridization...2294-300. 26 Jones PA, Baylin SB. The fundamental role of epigenetic events in cancer...

Minjie Wei; Tatyana A. Grushko; James Dignam; Fitsum Hagos; Rita Nanda; Lise Sveen; Jinhua Xu; James Fackenthal; Maria Tretiakova; Soma Das; and Olufunmilayo I. Olopade

2005-12-01T23:59:59.000Z

446

Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores  

E-Print Network (OSTI)

study of ethane and propane oxidation in the tropo- sphere,alkanes (ethane, C 2 H 6 ; propane, C 3 H 8 ; n-butane, n-Cfluid contamination. 4.1.2. Propane [ 24 ] Propane levels in

Aydin, M.; Williams, M. B; Saltzman, E. S

2007-01-01T23:59:59.000Z

447

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

E-Print Network (OSTI)

Sato, and N. Kato. 2003. Propane monooxygenase and NAD + -alcohol dehydrogenase in propane metabolism by Gordonia sp.tert-butyl ether by propane-grown Mycobacterium vaccae JOB5.

2007-01-01T23:59:59.000Z

448

E-Print Network 3.0 - alpha-naftol c10h8o 2-methyl Sample Search...  

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

copper phthalocyanine CuPc , 4- dicyanomethylene ... Source: So, Shu K. - Department of Physic, Hong Kong Baptist University Collection: Physics ; Materials Science 87...

449

Enhancing Transport of Hydrogenophaga flava ENV735 for Bioaugmentation of Aquifers Contaminated with Methyl tert-Butyl Ether  

Science Journals Connector (OSTI)

...column was washed with the surfactant solution. d The sand was prewashed with the surfactant solution, and the cells...washed with BSM without surfactant. This work was supported...bacteria through a sandy soil. Appl. Environ. Microbiol...

Sheryl H. Streger; Simon Vainberg; Hailiang Dong; Paul B. Hatzinger

2002-11-01T23:59:59.000Z

450

Sub-10-nm half-pitch electron-beam lithography by using poly(methyl methacrylate) as a negative resist  

E-Print Network (OSTI)

Developing high-resolution resists and processes for electron-beam lithography is of great importance for high-density magnetic storage, integrated circuits, and nanoelectronic and nanophotonic devices. Until now, hydrogen ...

Berggren, Karl K.

451

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

E-Print Network (OSTI)

, a mechanistic and kinetic investigation Derek C. Johnson1 , Vasgen A. Shamamian2 , John H. Callahan2 , Ferencz S in the future remediation of water. Chemical and physical mechanisms, together with carbon balances, are used

Dandy, David

452

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

Science Journals Connector (OSTI)

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

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

2001-02-10T23:59:59.000Z

453

Effect of Energy Restriction on Cell Cycle Machinery in 1-Methyl-1-Nitrosourea-induced Mammary Carcinomas in Rats  

Science Journals Connector (OSTI)

...relationship to the effects of energy restriction on mammary...Thompson H. J. Mechanisms of energy restriction: effects of...McGraw-Hill Publishing Co. New York 1990. 19 Zhu Z., Jiang...Thompson H. J. Effect of energy restriction on the expression...

Weiqin Jiang; Zongjian Zhu; and Henry J. Thompson

2003-03-15T23:59:59.000Z

454

Molecular Dynamic Simulation of Thermo-Mechanical Properties of Ultra-Thin Poly(methyl methacrylate) Films  

E-Print Network (OSTI)

........................................... 71 4.4 Proposed Approach .............................................................................. 72 4.4.1 Energy Gradient ....................................................................... 72 4.4.2 One-dimensional Analysis... ........................................... 71 4.4 Proposed Approach .............................................................................. 72 4.4.1 Energy Gradient ....................................................................... 72 4.4.2 One-dimensional Analysis...

Silva Hernandez, Carlos Ardenis A.

2011-08-08T23:59:59.000Z

455

Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films  

E-Print Network (OSTI)

at constant volume per unit volume [J m -3 K -1 ] Con = concentration of solution [%] D max = dimension of the heating spot [m] E = Young?s modulus [GPa] F = fluence of the heating laser [J m -2 ] Fo = Fourier non-dimensional number H = dimensionless... ] ? = standard deviation ? = absorption coefficient ? = pulse width of the heating laser [s] ? = responsivity Subscripts ab = absorption bulk = Bulk material e = average electron property at Fermi levels exp = experimental h = thickness num...

Kim, Ick Chan

2009-05-15T23:59:59.000Z

456

HC-Pro Suppression of Transgene Silencing Eliminates the Small RNAs but Not Transgene Methylation or the Mobile Signal  

Science Journals Connector (OSTI)

...and if HC-Pro interferes with this process, we developed a polymerase chain reaction...enzyme ( ), HC-Pro may target the process at this step. There are several possible...the two branches of gene silencing are interrelated and if HC-Pro affects VIGS in the same...

Allison C. Mallory; Lara Ely; Trent H. Smith; Rajendra Marathe; Radhamani Anandalakshmi; Mathilde Fagard; Herve Vaucheret; Gail Pruss; Lewis Bowman; Vicki B. Vance

457

Enhancing Transport of Hydrogenophaga flava ENV735 for Bioaugmentation of Aquifers Contaminated with Methyl tert-Butyl Ether  

Science Journals Connector (OSTI)

...National Science Foundation Small Business Innovative Research (SBIR) program (award no...Ontario, Canada. Ground Water Monit. Remediation 18: 113-122. 52 Scholl, M. A...evaluation of in situ bioaugmentation for remediation of chlorinated solvents in groundwater...

Sheryl H. Streger; Simon Vainberg; Hailiang Dong; Paul B. Hatzinger

2002-11-01T23:59:59.000Z

458

Surface Chemistry of CH3Br and Methyl Modified by Copper Deposition on Ru(001) T. Livneh and M. Asscher*  

E-Print Network (OSTI)

. They are observed at the step edges or adatoms that may alter adsorbate binding energy and generate new adsorption), the modified electronic structure was found to induce perturbations, which extend up to 50-100 Ă? away sites.20,21 Step ed

Asscher, Micha

459

Mechanistic Study of the Oxidation of a Methyl Platinum(II) Complex with O2 in Water: PtII  

E-Print Network (OSTI)

scavenger TEMPO do not support a homolytic mechanism. A SN2 mechanism was proposed for the formation. At pH 8, the reaction leads to a C1-symmetric monomethyl PtIV complex (dpms)PtIV Me(OH)2 (5) with high selectivity 97%; the reaction rate is first-order in [PtII Me] and fastest at pH 8.0. This behavior

Goddard III, William A.

460

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

Science Journals Connector (OSTI)

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

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

2004-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Effect of 1-Methyl-1-nitrosourea on Poly(Adenosine Diphosphate-Ribose) Polymerase Activity at the Nucleosomal Level  

Science Journals Connector (OSTI)

...6000 units/mg) and snake venom phos phodiesterase...from Drug Research and Development Program, National Cancer...that heating at high temperatures does not affect poly...was carried out using snake venom phosphodiestemase...After 15 mm at room temperature, the reaction was stopped...

Swaroop Sudhakar; Kenneth D. Tew; and Mark E. Smulson

1979-04-01T23:59:59.000Z

462

A novel multifunctional O-methyltransferase implicated in a dual methylation pathway associated with lignin biosynthesis in?loblolly?pine  

Science Journals Connector (OSTI)

...in The Biochemistry of Plants , ed Conn E E ( Academic , New York ), 7 , pp 457 – 478 . 3 Chang H M Sarkanen K V ( 1973 ) Tappi 56 : 132 – 136 . 4 Chiang V L Funaoka M ( 1990 ) Holzforschung 44 : 309 – 313 . 5 Higuchi T ( 1985 ) in Biosynthesis and...

Laigeng Li; Jacqueline L. Popko; Xing-Hai Zhang; Keishi Osakabe; Chung-Jui Tsai; Chandrashekhar P. Joshi; Vincent L. Chiang

1997-01-01T23:59:59.000Z

463

Enrichment and Molecular Characterization of a Bacterial Culture That Degrades Methoxy-Methyl Urea Herbicides and Their Aniline Derivatives  

Science Journals Connector (OSTI)

...to identify the bacterial composition of a coculture capable of...changes in bacterial species composition in enrichment cultures prepared...Changes in bacterial species composition in enrichment cultures with...and remediation for retail agrochemical dealers R. Pasquini G...

Said El-Fantroussi

2000-12-01T23:59:59.000Z

464

Synthesis and crystal structure studies of ethyl 5-methyl-1, 3-diphenyl-1H-pyrazole-4-carboxylate  

SciTech Connect

The title compound, C{sub 19}H{sub 18}N{sub 2}O{sub 2}, was investigated by single crystal X-ray diffraction method. It crystallizes in monoclinic class under the space group P2{sub 1}/c with cell parameters a= 8.4593(4) Ĺ, b=15.6284(6) Ĺ, c=12.4579(5) Ĺ, ?=90°, ?=98.241(3)°, ?=90° and Z=2. The ethoxycarbonyl group is slightly twisted from the pyrazole ring, and adopts syn-periplanar conformation. The crystal structure is stabilized by intermolecular C-H….O hydrogen bonds, which help in stabilizing the crystal structure.

Chandra,; Babu, E. A. Jithesh; Mahendra, M., E-mail: mahendra@physics.uni-mysore.ac.in [Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore-570006 (India); Srikantamurthy, N.; Umesha, K. B. [Department of Chemistry, Yuvaraja's College, University of Mysore, Mysore-570005 (India)

2014-04-24T23:59:59.000Z

465

A determination of the heats of combustion of the five-carbon fatty acids and their methyl and ethyl esters  

E-Print Network (OSTI)

'srr Ins~ Ce?c ~c Dl? 30? Tbe bstwLs sodAL 1Need wss ohtwixlsd frccc ths Q?S? Wool? Bar? of ghsnclalPds? Tbs hest ef ~tdocc wss giwRl se g6?QQ shs? kja/g? cocos (weighed in wceccs) er QLg eaL/g? essa (in @sees)? 3 oslorie? 0?wg$840 sbs, +? 'ei ~ r...LLd bs ~aied fer tbs fi~carhc?L aCCLds?ad the baste of vaoorisat4os of tbs ether Lsaee4e ac@de ae4hsated a4 their ~g, xdn4s The bs?te of vsyorhwQ. oe o' ths sands a4 2~ C? wars estiaated ly a?S~ 4R? k", ~? ~4lcsi55, ccsd '~ ~ . -? AIL' %7? Q? ~ +sad...

Gilby, Ralph F

2012-06-07T23:59:59.000Z

466

Effect of Energy Restriction on Cell Cycle Machinery in 1-Methyl-1-Nitrosourea-induced Mammary Carcinomas in Rats  

Science Journals Connector (OSTI)

...libitum fed (control); 40% energy ER continuously; and 40% ER...was annealed with GEAprimer Mix at 70C for 3 min and cooled...these effects are reversed by energy repletion. As an initial effort...abbreviations used are: ER, energy restriction; ER-REP, energy...

Weiqin Jiang; Zongjian Zhu; and Henry J. Thompson

2003-03-15T23:59:59.000Z

467

E-Print Network 3.0 - asymmetric dimethyl arginine-dimethylarginine...  

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

methyl acetate is selectively produced by reaction of dimethyl ether with carbon monoxide... .; "Superacid-Catalyzed Carbonylation of Methane, Methyl Halides, Methyl Alcohol,...

468

PMo or PW heteropoly acids supported on MCM-41 silica nanoparticles: Characterisation and FT-IR study of the adsorption of 2-butanol  

SciTech Connect

Mesoporous silica, prepared in basic conditions, has been loaded (20% weight) with 12-molybdophosphoric (PMo) or 12-tungstophosphoric (PW) acid and calcined at different temperatures ranging between 250 and 550 deg. C. The samples have been characterised by N{sub 2} adsorption-desorption at -196 deg. C, transmission electron microscopy (TEM), powder X-ray diffraction (PXRD), UV-visible diffuse reflectance, Raman spectroscopy and temperature programmed reduction (TPR). The acidity and catalytic activity have been, respectively, examined by monitoring the adsorption of pyridine and 2-butanol by FT-IR spectroscopy. The results indicate that PW and PMo acids are highly dispersed on mesoporous silica MCM-41 spherical nanoparticles. While PMo retains its Keggin structure up to 550 deg. C, PW decomposes at this temperature into crystalline WO{sub 3} and phosphorous oxides. In both cases, the morphology, hexagonal symmetry and long-range order observed for the support are preserved with calcination up to 450 deg. C. The Broensted-type acid sites found in all samples, whose surface concentration decreases as the calcination temperature increases, are responsible for the selective formation of cis-butene detected upon adsorption of 2-butanol. The sample containing PW calcined at 450 deg. C also shows selectivity to methyl ethyl ketone. - Graphical abstract: Samples based in MCM-41 nanoparticles loaded with tungstophosphoric and molybdophosphoric acids have been synthesised. The uncalcined solids and that derived upon their calcination in the temperature range 250-550 deg. C have been characterised and evaluated in the decomposition of 2-butanol monitored by FT-IR spectroscopy.

Carriazo, Daniel [GIR-QUESCAT, Dpto. de Quimica Inorganica, Universidad de Salamanca, 37008-Salamanca (Spain); Domingo, Concepcion [Instituto de Estructura de la Materia, C.S.I.C., Serrano, 123, 28006-Madrid (Spain); Martin, Cristina [GIR-QUESCAT, Dpto. de Quimica Inorganica, Universidad de Salamanca, 37008-Salamanca (Spain); Rives, Vicente [GIR-QUESCAT, Dpto. de Quimica Inorganica, Universidad de Salamanca, 37008-Salamanca (Spain)], E-mail: vrives@usal.es

2008-08-15T23:59:59.000Z

469

Progress towards the synthesis of tetracyclic heteroaromatic compounds via tandem benzannulation-cyclization strategies  

E-Print Network (OSTI)

A tandem benzannulation-cyclization strategy was successfully applied to the synthesis of a tetracyclic heteroaromatic compound expected to have interesting electronic properties. Benzannulation of a diazo ketone and a ...

Mamaliga, Galina

2012-01-01T23:59:59.000Z

470

Ionic Liquids as Green Solvents for the Oxidation of Alcohols  

Science Journals Connector (OSTI)

Carbonyl compounds are of central importance to organic chemistry, biochemistry, and biology. Aldehydes and ketones are used as starting materials or reagents for the synthesis of other organic compounds, drugs, ...

Farhad Shirini; Masoumeh Abedini; Seyyed Vahid Atghia

2012-01-01T23:59:59.000Z

471

Techno-economic analysis of biomass to fuel conversion via the MixAlco process  

Science Journals Connector (OSTI)

Figure 2 depicts biomass-to-hydrocarbon fuels conversion via the MixAlco process. To make hydrocarbon ... -efficiency vapor-compression evaporator, (4) thermal conversion of salts to ketones, (5) hydrogenation...

Viet Pham; Mark Holtzapple…

2010-11-01T23:59:59.000Z

472

Design and synthesis of probes for detection of protein-protein interaction and RNA localization  

E-Print Network (OSTI)

The use of the ketone biotin - benzophenone-biotin hydrazide system for detecting the formation of cyan fluorescent protein and NF-kappaB p50 dimers was assessed. A series of benzophenone-based probes were synthesized and ...

Ryan, Jeremy Adam

2005-01-01T23:59:59.000Z

473

Optical imaging for the new grammar of drug discovery  

Science Journals Connector (OSTI)

...the tumour region was observed only for the probes with the warhead acyloxymethyl ketone (AOMK) group. By contrast, control...reactive functional group. The ability to label caspase-3 in intact cells was successfully tested upon apoptosis induction of Jurkat...

Thomas Krucker; Britto S. Sandanaraj

2011-01-01T23:59:59.000Z

474

DOI: 10.1002/cssc.201402244 Chemocatalytic Upgrading of Tailored Fermentation  

E-Print Network (OSTI)

for blending with gasoline,[7­9] production of longer chain alcohols for jet and diesel blendstocks suffers reported a chemical catalysis route to generate aliphatic ketones (C5­C19) that are components of gasoline

Toste, Dean

475

In Vivo Lactate Production and Utilization by Jensen Sarcoma and Morris Hepatoma 7288CTC  

Science Journals Connector (OSTI)

...truncated superficial epigastric vessels. The tumor is tissue- isolated...arterial blood. Ketone body consumption was directly dependent on...glutamine as the major respiratory fuels in vivo for postabsorptive...Courtney, A. H. Glucose consumption by transplanted tumors in...

Leonard A. Sauer and Robert T. Dauchy

1986-02-01T23:59:59.000Z

476

E-Print Network 3.0 - asymmetric catalysis stereoelectronic Sample...  

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

>> Page: << < 1 2 3 4 5 > >> 81 2166 J. Am. Chem. SOC.1995,117, 2166-2178 Mechanism of Lithium Dialkylamide-Mediated Ketone and Summary: . Asymmetric Synthesis; Morrison, J. D.,...

477

Studies directed towards the total synthesis of (+)-sieboldine A  

E-Print Network (OSTI)

Progress towards the total synthesis of sieboldine A is described. This synthetic approach uses a nickel-catalyzed alkyne-ketone reductive cyclization to form the hydrindane core of the natural product in good yield and ...

Gehling, Victor S. (Victor Scott)

2008-01-01T23:59:59.000Z

478

Synthesis and determination of the absolute configuration of Armatol A through a polyepoxide cyclization cascade : revision of the proposed structures of Armatols A-F  

E-Print Network (OSTI)

Cyclization Cascades Leading to the Tricyclic Fragment of Armatol A The synthesis of the fused 6,7,7-tricycle of armatol A was investigated. Fragments containing both a ketone and an aldehyde for subsequent fragment coupling ...

Underwood, Brian Saxton

2011-01-01T23:59:59.000Z

479

Mechanistic and structural studies of nitroalkane oxidase from Fusarium oxysporum  

E-Print Network (OSTI)

This thesis describes the purification and the initial mechanistic studies of nitroalkane oxidase from Fusarium oxysponim. Nitroalkane oxidase catalyzes the oxidative denitrification of a nitroalkane to the corresponding aidehyde or ketone...

Heasley, Carl J

1995-01-01T23:59:59.000Z

480

The conversion of corn stover and pig manure to carboxylic acids with the MixAlco process  

E-Print Network (OSTI)

The MixAlco process, developed by Dr. Mark T. Holtzapple, uses anaerobic fermentation to convert waste biomass into carboxylate salts which can then be manipulated into carboxylic acids, ketones and alcohols. This project focuses on the application...

Black, Amanda Spring

2013-02-22T23:59:59.000Z

Note: This page contains sample records for the topic "methyl isobutyl ketone" 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

Synthesis of indoles via a tandem benzannulation-cyclization strategy  

E-Print Network (OSTI)

Vinylketenes (generated in situ from cyclobutenones or a-diazo ketones) react with ynamides via a pericyclic cascade process to produce highly-substituted aniline derivatives. Cyclization of the benzannulation products can ...

Lam, Tin Yiu

2008-01-01T23:59:59.000Z

482

Characterization of Triclocarban, Methyl- Triclosan, and Triclosan in Water, Sediment, and Corbicula Fluminea (Müller, 1774) Using Laboratory, in Situ, and Field Assessments.  

E-Print Network (OSTI)

??In the last decade emerging contaminants research has intensified in a bid to answer questions about fate, transport, and effects as these chemicals as they… (more)

Edziyie, Regina E.

2011-01-01T23:59:59.000Z

483

Synthesis of 2'-deoxy-2'-[.sup.18F]fluoro-5-methyl-1-B-D-arabinofuranosyluracil (.sup.18F-FMAU)  

DOE Patents (OSTI)

The present invention relates to methods of synthesizing .sup.18F-FMAU. In particular, .sup.18F-FMAU is synthesized using one-pot reaction conditions in the presence of Friedel-Crafts catalysts. The one-pot reaction conditions are incorporated into a fully automated cGMP-compliant radiosynthesis module, which results in a reduction in synthesis time and simplifies reaction conditions. The one-pot reaction conditions are also suitable for the production of 5-substituted thymidine or cytidine analogs. The products from the one-pot reaction (e.g. the labeled thymidine or cytidine analogs) can be used as probes for imaging tumor proliferative activity. More specifically, these [.sup.18F]-labeled thymidine or cytidine analogs can be used as a PET tracer for certain medical conditions, including, but not limited to, cancer disease, autoimmunity inflammation, and bone marrow transplant.

Li, Zibo; Cai, Hancheng; Conti, Peter S

2014-12-16T23:59:59.000Z

484

Characterization and translation of methylated and unmethylated vesicular stomatitis virus mRNA synthesized in vitro by ribonucleoprotein particles from vesicular stomatitis virus-infected L cells.  

Science Journals Connector (OSTI)

...digestion has already been established as m 7G' 'ppp 'Am, both peaks I* and II* may be considered to have the sequence of m7G"pppl"Am. The absence of any radioactive m7G may be explained by the labile nature of 3H in the C-8 position. The capped sequence...

F Toneguzzo; H P Ghosh

1976-02-01T23:59:59.000Z

485

Synthesis of 11 -(4-dimethylaminophenyl)-17 -hydroxy-17 -(3-methyl-1-butynyl)-4, 9-estradien-3-one and 11 -(4-acetophenyl)-  

E-Print Network (OSTI)

was found to be more, whereas that of compound 3 was less. © 2000 Elsevier Science Inc. All rights reserved, has passed the clinical trials in USA, and is under clinical trials in India. It is also a potent-mail address: hazra@ems.ncl.res.in (B.G. Hazra) Steroids 65 (2000) 157­162 0039-128X/00/$ ­ see front matter

Pal, Debnath

486

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

487

The Plastidial 2-C-Methyl-d-Erythritol 4-Phosphate Pathway Provides the Isoprenyl Moiety for Protein Geranylgeranylation in Tobacco BY-2 Cells  

Science Journals Connector (OSTI)

...prepared from envelope membrane fractions of spinach, kale, and Indian mustard (Brassica juncea) plastids, it was shown that unidirectional...Strasbourg, under the direction of Prof. Thomas Bach. From this point on, I have developed a strong interest in studying the biosynthesis...

Esther Gerber; Andréa Hemmerlin; Michael Hartmann; Dimitri Heintz; Marie-Andrée Hartmann; Jérôme Mutterer; Manuel Rodríguez-Concepción; Albert Boronat; Alain Van Dorsselaer; Michel Rohmer; Dring N. Crowell; Thomas J. Bach

2009-01-09T23:59:59.000Z

488

Orientation and Conformation of Methyl Pyruvate on Ni(111) M. Castonguay, J. -R. Roy, A. Rochefort, and P. H. McBreen*  

E-Print Network (OSTI)

´bec), Canada G1K7P4, and Centre de Recherche en Calcul Applique´ (CERCA) 5160, Boul. De´carie, Bureau 414, Montre´al, (Que´bec), Canada H3X2H9 ReceiVed August 16, 1999 Abstract: The molecular orientation of cinchonidine with Pt(111) has been studied using LEED and XPS,3i this is the first report of a surface

Rochefort, Alain

489

Accessible DNA and Relative Depletion of H3K9me2 at Maize Loci Undergoing RNA-Directed DNA Methylation  

Science Journals Connector (OSTI)

...University of Georgia, Athens, Georgia 30602 b Department of Biological Science, Florida State University, Tallahassee, Florida 32306 c Swammerdam Institute for Life Sciences, Universiteit van Amsterdam, 1098 XH Amsterdam, The Netherlands d...

Jonathan I. Gent; Thelma F. Madzima; Rechien Bader; Matthew R. Kent; Xiaoyu Zhang; Maike Stam; Karen M. McGinnis; R. Kelly Dawe

2014-12-02T23:59:59.000Z

490

A simple high-resolution procedure to study DNA methylation and in vivo DNA-protein interactions on a single-copy gene level in higher eukaryotes  

Science Journals Connector (OSTI)

...CpG. nucleotide primers. The greatest merits of this latter proce- dure are its speed...Acad. Sci. USA 85, 6697-6700. 12. Nick, H. & Gilbert, W. (1985) Nature...Chrysogelos, S., Stein, G., Stein, J. & Nick, H. (1987) Science 236, 1308-1311...

H Saluz; J P Jost

1989-01-01T23:59:59.000Z

491

Effects of Chronic Dietary Ethanol on in Vivo and in Vitro Metabolism of Methylazoxymethanol and on Methylazoxymethanol-induced DNA Methylation in Rat Colon and Liver  

Science Journals Connector (OSTI)

...research-article Basic Sciences Inhibition by Dietary Ethanol of Experimental Colonic Carcinogenesis...assessed the effects of chronic dietary ethanol consumption during the preinduction and...344 rats were given 33% of calories as ethanol or no ethanol (controls). Pair-feeding...

Emerich S. Fiala; Ock Soon Sohn; Stanley R. Hamilton

1987-11-15T23:59:59.000Z

492

Local cerebral metabolic effects of L-dopa therapy in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced parkinsonism in monkeys  

Science Journals Connector (OSTI)

...utilization) LINDA J. PORRINO*t, RICHARD S. BURNSt?, ALISON M. CRANE*, ERNESTA PALOMBO*, IRWIN J. KOPINt, AND Louis...16. Leenders, K. L., Wolfson, L., Gibbs, J. M., Wise, R. J. S., Causon, R., Jones, T. & Legg, N. J...

L J Porrino; R S Burns; A M Crane; E Palombo; I J Kopin; L Sokoloff

1987-01-01T23:59:59.000Z

493

p16INK4A Hypermethylation Detected by Fluorescent Methylation-specific PCR in Plasmas from Non-Small Cell Lung Cancer  

Science Journals Connector (OSTI)

...might contribute to a diagnostic grid for NSCLC. INTRODUCTION Delayed...contribution to a diagnostic grid that included information provided...samples by using a QIAamp DNA Mini kit (Qiagen, Milan, Italy...to be tested in a diagnostic grid for disease monitoring on plasma...

Alessandra Bearzatto; Davide Conte; Milo Frattini; Nadia Zaffaroni; Francesca Andriani; Debora Balestra; Luca Tavecchio; Maria Grazia Daidone; and Gabriella Sozzi

2002-12-01T23:59:59.000Z

494

Morphologically Normal-Appearing Mammary Epithelial Cells Obtained from High-Risk Women Exhibit Methylation Silencing of INK4a/ARF  

Science Journals Connector (OSTI)

...CA58207 (T.D. Tlsty). The costs of publication of this article...Review Board at Duke University Medical Center, in accordance with...were used under reduced lighting and stored in a desiccator...initial RPFNA at Duke University Medical Center from March 2003 to August...

Gregory R. Bean; Andrew D. Bryson; Patrick G. Pilie; Vanessa Goldenberg; Joseph C. Baker, Jr.; Catherine Ibarra; Danielle M.U. Brander; Carolyn Paisie; Natalie R. Case; Mona Gauthier; Paul A. Reynolds; Eric Dietze; Julie Ostrander; Victoria Scott; Lee G. Wilke; Lisa Yee; Bruce F. Kimler; Carol J. Fabian; Carola M. Zalles; Gloria Broadwater; Thea D. Tlsty; and Victoria L. Seewaldt

2007-11-15T23:59:59.000Z

495

On the Interaction of Methyl Azide (CH3N3) Ices with Ionizing Radiation: Formation of Methanimine (CH2NH), Hydrogen Cyanide (HCN), and Hydrogen Isocyanide (HNC)  

E-Print Network (OSTI)

investigations mimicking Titan's troposphere12 were carried out on a low-temperature (78-82 K) gas cell has been detected in the interstellar medium18-20 and in ices in the comet C/1995 O1 (Hale-Bopp),21

Kaiser, Ralf I.

496

A Role for CHH Methylation in the Parent-of-Origin Effect on Altered Circadian Rhythms and Biomass Heterosis in Arabidopsis Intraspecific Hybrids  

Science Journals Connector (OSTI)

...Biosystems), in which holes were placed above each well for seedling gas exchange. Plates were moved to the TopCount device and interleaved...Nat. Rev. Genet. 11 : 204-220. Law, J.A. , Du, J., Hale, C.J., Feng, S., Krajewski, K., Palanca, A.M...

Danny W.-K. Ng; Marisa Miller; Helen H. Yu; Tien-Yu Huang; Eun-Deok Kim; Jie Lu; Qiguang Xie; C. Robertson McClung; Z. Jeffrey Chen

2014-06-03T23:59:59.000Z

497

An automated hydride generation-cryogenic trapping-ICP-MS system for measuring inorganic and methylated Ge, Sb and As species  

E-Print Network (OSTI)

An automated hydride generation-cryogenic trapping-ICP-MS system for measuring inorganic of both flow injection and batch hydride generation and couples it to an automated cryogenic trapping unit with detection by ICP-MS. The Teflon cryogenic trap was packed with 10 cm of SE-30 5% Chromosorb W-HP 80­100 mesh

Canberra, University of

498

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

Science Journals Connector (OSTI)

...August 2002). EPA-821-R-02-019. Office of Water, Office of Science and Technology, Engineering and Analysis Division...EPA-821-R-01-020. Office of Water, Office of Science and Technology, Engineering and Analysis Division...

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

2014-08-08T23:59:59.000Z

499

GC-MS determination of parabens, triclosan and methyl triclosan in water by in situ derivatisation and stir-bar sorptive extraction  

Science Journals Connector (OSTI)

Stir-bar sorptive extraction in combination with an in situ derivatisation reaction and thermal desorption–gas chromatography–mass spectrometry was successfully applied to determine parabens (methylparaben, is...

Ana María Casas Ferreira; Monika Möder…

2011-01-01T23:59:59.000Z

500

Synthesis of [.sup.13C] and [.sup.2H] substituted methacrylic acid, [.sup.13C] and [.sup.2H] substituted methyl methacrylate and/or related compounds  

DOE Patents (OSTI)

The present invention is directed to labeled compounds of the formulae ##STR00001## wherein Q is selected from the group consisting of --S(.dbd.O)--, and --S(.dbd.O).sub.2--, Z is selected from the group consisting of 1-naphthyl, substituted 1-naphthyl, 2-naphthyl, substituted 2-naphthyl, and phenyl groups with the structure ##STR00002## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each independently selected from the group consisting of hydrogen, a C.sub.1-C.sub.4 lower alkyl, a halogen, and an amino group selected from the group consisting of NH.sub.2, NHR and NRR' where R and R' are each independently selected from the group consisting of a C.sub.1-C.sub.4 lower alkyl, an aryl, and an alkoxy group, and X is selected from the group consisting of hydrogen, a C.sub.1-C.sub.4 lower alkyl group, and a fully-deuterated C.sub.1-C.sub.4 lower alkyl group.

Alvarez, Marc A. (Santa Fe, NM); Martinez, Rodolfo A. (Santa Fe, NM); Unkefer, Clifford J. (Los Alamos, NM)

2010-02-16T23:59:59.000Z