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Note: This page contains sample records for the topic "methyl ethyl 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.


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

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

SciTech Connect (OSTI)

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

Kinetics of ethanol dehydrogenation into ethyl acetate  

Science Journals Connector (OSTI)

The kinetics of gas-phase dehydrogenation of ethanol into ethyl acetate over a copper-zinc- ... means to design a reactor for dehydrogenation of ethanol into ethyl acetate in different regimes.

V. A. Men’shchikov; L. Kh. Gol’dshtein; I. P. Semenov

2014-01-01T23:59:59.000Z

12

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

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

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

13

Process for the preparation of ethyl benzene  

DOE Patents [OSTI]

Ethyl benzene is produced in a catalyst bed under 0.25 to 50 atmospheres of pressure and at temperatures in the range of 50.degree. C. to 300.degree. C., using as the catalyst a mole sieve characterized as acidic by feeding ethylene to the catalyst bed while benzene is conveniently added through the reflux to result in a molar excess present in the reactor to that required to react with ethylene, thereby reacting substantially all of the ethylene and recovering benzene as the principal overhead and ethyl benzene and diethyl benzene in the bottoms. The bottoms are fractionated, the ethyl benzene recovered and the bottoms are contacted with benzene in the liquid phase in a fixed bed straight pass reactor under conditions to transalkylate the benzene thereby converting most of the diethyl benzene to ethyl benzene which is again separated and recovered.

Smith, Jr., Lawrence A. (Houston, TX); Arganbright, Robert P. (Houston, TX); Hearn, Dennis (Houston, TX)

1995-01-01T23:59:59.000Z

14

Process for the preparation of ethyl benzene  

DOE Patents [OSTI]

Ethyl benzene is produced in a catalyst bed under 0.25 to 50 atmospheres of pressure and at temperatures in the range of 50 C to 300 C, using as the catalyst a mole sieve characterized as acidic by feeding ethylene to the catalyst bed while benzene is conveniently added through the reflux to result in a molar excess present in the reactor to that required to react with ethylene, thereby reacting substantially all of the ethylene and recovering benzene as the principal overhead and ethyl benzene and diethyl benzene in the bottoms. The bottoms are fractionated, the ethyl benzene recovered and the bottoms are contacted with benzene in the liquid phase in a fixed bed straight pass reactor under conditions to transalkylate the benzene thereby converting most of the diethyl benzene to ethyl benzene which is again separated and recovered. 2 figs.

Smith, L.A. Jr.; Arganbright, R.P.; Hearn, D.

1995-12-19T23:59:59.000Z

15

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

16

Isobaric vapor–liquid equilibria of binary system ethyl acetate + ethyl benzene + lithium bromide  

Science Journals Connector (OSTI)

Lithium bromide salt (99.9 wt% purity) ... . The salt studied was dissolved in ethyl acetate as a solvent to the saturated level...

Zaid Ahmed Al-Anber; Munther Issa Kandah…

2013-05-01T23:59:59.000Z

17

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

SciTech Connect (OSTI)

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

18

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

19

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

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

20

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

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

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

22

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

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

23

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

24

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.

25

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters...  

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

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...

26

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

27

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

28

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

29

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

30

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

SciTech Connect (OSTI)

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

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

2012-08-14T23:59:59.000Z

31

Electron stimulated reactions of methyl iodide coadsorbed with amorphous solid water  

SciTech Connect (OSTI)

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

32

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

33

List of Reproductive Toxins and Highly Acute Toxic Materials  

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

34

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

35

Aptamer-Based Microcantilever Sensor for O-ethyl S-[2(diisopropylamino)ethyl] methylphosphonothiolate, Sarin Detection and Kinetic Analysis  

Science Journals Connector (OSTI)

Abstract A novel method for O-ethyl S-[2(diisopropylamino)ethyl] methylphosphonothiolate (VX), sarin detection and kinetic analysis based on piezoresistive microcantilever aptasensor was proposed, where VX and sarin aptamers were immobilized on the microcantilever surface by biotin-avidin binding system. A linear relationship between the response voltage and the concentration of VX in the range of 2?60 ?g L?1 was obtained, the linear regression equation was ?Ue = 0.886C ? 1.039 (n = 5, R = 0.984, p < 0.001) and the detection limit was 2 ?g L?1 (S/N ?A linear relationship between the response voltage and the concentration of sarin in the range of 10?60 ?g L?1 was obtained, the linear regression equation was ?Ue = 0.716C ? 2.304 (n = 5, R = 0.996, p < 0.001) and the detection limit was 10 ?g L?1 (S/N ?The sensor showed no response for O-butyl methylphosphonochloridate, a structural analog of VX and sarin, indicating a high specificity and good selectivity. On this basis, a reaction kinetic model based on receptor-ligand binding and the relationship with response voltage was established. Response voltage (?Ue) and response time (t0) obtained from the fitting equation on different concentrations of VX and sarin fitted well with the measured values.

Zhi-Wei LIU; Zhao-Yang TONG; Lan-Qun HAO; Bing LIU; Xi-Hui MU; Jin-Ping ZHANG; Chuan GAO

2014-01-01T23:59:59.000Z

36

Controlling DNA Methylation  

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

37

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.

38

Low Temperature Autoignition of C8H16O2 Ethyl and Methyl Esters in a Motored Engine  

Broader source: Energy.gov [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

39

Synthesis and crystal structure studies of ethyl 5-methyl-1, 3-diphenyl-1H-pyrazole-4-carboxylate  

SciTech Connect (OSTI)

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

40

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

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

Reactions of Ethyl Groups on a Model Chromia Surface: Ethyl Chloride on Stoichiometric Alpha-Cr2O3(1012)  

SciTech Connect (OSTI)

The reaction of CH3CH2Cl over the nearly-stoichiometric ?-Cr2O3 (1 0 View the MathML source 2) surface yields gas phase CH2double bond; length as m-dashCH2, CH3CH3, H2 and surface chlorine adatoms. The decomposition reaction is initiated via C-Cl bond cleavage to give a surface ethyl (CH3CH2-) intermediate. A rate-limiting ?-hydride elimination from the surface ethyl species produces gas phase CH2double bond; length as m-dashCH2 and surface hydrogen atoms. Two parallel competing reactions form CH3CH3, via ?-hydride addition to remaining surface ethyl species (reductive elimination), and H2, via the combination of two surface hydrogen atoms. The chlorine freed from the dissociation of CH3CH2Cl binds at the five-coordinate surface Cr3+ sites on the stoichiometric surface and inhibits the surface chemistry via simple site blocking. No surface carbon deposition is observed from the thermal reaction of ethyl chloride, suggesting that ethyl intermediates are not primary coke forming intermediates in the dehydrogenation of ethane over (1 0 View the MathML source 2) facets of ?-Cr2O3.

Brooks, J.; Ma, Q; Cox, D

2009-01-01T23:59:59.000Z

42

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

43

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

44

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

SciTech Connect (OSTI)

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

45

Small angle neutron scattering study of deuterated sodium dodecylsulfate micellization in dilute poly((2edimethylamino)ethyl methacrylate) solutions  

E-Print Network [OSTI]

Small angle neutron scattering study of deuterated sodium dodecylsulfate micellization in dilute 2010 Keywords: Poly((2edimethylamino)ethyl methacrylate) Micelle Small angle neutron scattering a b angle neutron scattering. We found three transitions of the poly ((2edimethylamino)ethyl methacrylate

Kofinas, Peter

46

Detection of Benzene, Toluene, Ethyl Benzene, and Xylenes (BTEX) Using Toluene Dioxygenase-Peroxidase Coupling Reactions  

E-Print Network [OSTI]

bioassay may be suitable for field monitoring of BTEX to identify and track contaminated water and follow in contaminated water because of their accuracy and sensitivity. Although very sensitive, the cost associatedDetection of Benzene, Toluene, Ethyl Benzene, and Xylenes (BTEX) Using Toluene Dioxygenase

Chen, Wilfred

47

A Novel Method for Separation and Identification of Sulphur Compounds in Naphtha (30–200°C) and Middle Distillate (200–350°C) Fractions of Lloydminster Heavy Oil by GC/MS  

Science Journals Connector (OSTI)

......5-diethylthiophene thiophene diethyl sulphide tetrahydrothiophene ethyl phenyl sulphide naphthalene...benzothiophene dibenzothiophene methyl tetrahydrothiophene methyl tetrahydrothiopyran dimethyl tetrahydrothiophene ethyl butyl sulphide amyl ethyl......

M.A. Poirier; G.T. Smiley

1984-07-01T23:59:59.000Z

48

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

49

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

50

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.

51

Dynamic Simulation of Startup in Ethyl tert-Butyl Ether Reactive Distillation with Input Multiplicity  

Science Journals Connector (OSTI)

Dynamic Simulation of Startup in Ethyl tert-Butyl Ether Reactive Distillation with Input Multiplicity ... However, smaller internal rates inside the column that result from lower reboiler and condenser duty could increase the potential risk of flooding in the column and reduce the availability of reactants in the reactive section. ... Column simulations performed using both Pro/II and SpeedUp showed excellent agreement with previously published exptl. ...

Budi H. Bisowarno; Moses O. Tadé

2000-05-09T23:59:59.000Z

52

Association Behavior of Biotinylated and Non-Biotinylated PolyEthylene Oxide-b-Poly(2-(Diethylamino)Ethyl Methacrylate)  

E-Print Network [OSTI]

Biotinylated and non-biotinylated copolymers of ethylene oxide (EO) and 2-(diethylamino)ethyl methacrylate (DEAEMA) were synthesized by the atom transfer radical polymerization technique (ATRP). The chemical compositions ...

Tan, J. F.

53

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

E-Print Network [OSTI]

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

Al-Arfaj, Muhammad A.

54

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

SciTech Connect (OSTI)

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

55

Effect of salinity on methylation of mercury  

SciTech Connect (OSTI)

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

56

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

SciTech Connect (OSTI)

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

57

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

58

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

59

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

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

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

60

Catalytic oxidation of ethyl acetate over La-Co and La-Cu oxides  

Science Journals Connector (OSTI)

Abstract Lanthanum-containing mixed oxides (La-Co and La-Cu) were synthesized by several methods: exotemplating, evaporation, glycine-nitrate and glycine-nitrate-exotemplating. Samples were characterized by thermogravimetry and differential scanning calorimetry, N2 adsorption, temperature programmed reduction, scanning electron microscopy and X-ray diffraction. The materials obtained were tested as catalysts for ethyl acetate oxidation, as a model volatile organic compound. La-Cu samples showed poor catalytic performance, but La-Co materials were much more active than the individual components. Catalytic activity seems to be mainly determined by the easiness of reduction of the catalysts, which is related to the availability of oxygen from the lattice. Catalysts containing Co or Cu in excess of La (on a molar base) were more active than the corresponding mixed oxides consisting of equal amounts of La and the transition metal. Samples prepared by the evaporation method were more active than those prepared by exotemplating, for the same molar ratio. Samples prepared by evaporation and glycine-nitrate methods calcined at 600 °C had a better performance than the corresponding oxides calcined at 300 °C. The most active sample found in this study was the La-Co mixed oxide prepared by the glycine nitrate method and calcined at 600 °C, 100% conversion of ethyl acetate to H2O and CO2 being achieved at 230 °C.

X. Chen; S.A.C. Carabineiro; P.B. Tavares; J.J.M. Órfăo; M.F.R. Pereira; J.L. Figueiredo

2014-01-01T23:59:59.000Z

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

Production of methyl tert-alkyl ethers  

SciTech Connect (OSTI)

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

Trofimov, V.A.

1995-01-01T23:59:59.000Z

62

Atmospheric chemistry of diethyl ether and ethyl tert-butyl ether  

SciTech Connect (OSTI)

The mechanisms for the Cl-initiated and OH-initiated atmospheric oxidation of diethyl ether and ethyl tert-butyl ether (ETBE) have been determined. For diethyl ether the products are ethyl formate and formaldehyde and its atmospheric oxidation can be represented by C{sub 2}H{sub 5}OC{sub 2}H{sub 5} + OH + 2NO {yields} C{sub 2}H{sub 5}OC(O)H + HCHO + 2NO{sub 2} + HO{sub 2}. The mechanism for the atmospheric oxidation of ETBE is more complex, with 80% of the reaction being accounted for in terms of tert-butyl formate and formaldehyde. The remaining 20% the authors ascribe to 2-ethoxy-2-methylpropanal. The atmospheric oxidation of ETBE can be represented by ETBE + OH + 1.8NO {yields} 0.8HCOOC(CH{sub 3}){sub 3} + 0.2C{sub 2}H{sub 5}OC(CH{sub 3}){sub 2}CHO + HO{sub 2} + 0.8HCHO + 1.8NO{sub 2}. THe subsequent atmospheric chemistry of 2-ethoxy-2-methylpropanal the authors estimate to be represented by C{sub 2}H{sub 5}OC(CH{sub 3}){sub 2}CHO + OH + 3NO {yields} CO{sub 2} + H{sub 2}CO + C{sub 2}H{sub 5}OC(O)CH{sub 3} + HO{sub 2} + 3NO{sub 2}. These results are discussed in terms of the reactivity of these compounds in urban atmospheres.

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

1991-03-01T23:59:59.000Z

63

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

64

A review on environmental factors regulating arsenic methylation in humans  

SciTech Connect (OSTI)

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

65

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

66

Physical insight into switchgrass dissolution in the ionic liquid 1-ethyl-3-methylimidazolium acetate  

SciTech Connect (OSTI)

Small-angle neutron scattering was used to characterize solutions of switchgrass and the constituent biopolymers cellulose, hemicellulose, and lignin, as well as a physical mixture of them mimicking the composition of switchgrass, dissolved in the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate. The results demonstrate that the IL dissolves the cellulose fibrils of switchgrass, although a supramolecular biopolymer network remains that is not present in solutions of the individual biopolymers and that does not self-assemble in a solution containing the physical mixture of the individual biopolymers. The persistence of a network-like structure indicates that dissolving switchgrass in the IL does not disrupt all of the physical entanglements and covalent linkages between the biopolymers created during plant growth. Reconstitution of the IL-dissolved switchgrass yields carbohydrate-rich material containing cellulose with a low degree of crystallinity, as determined by powder X-ray diffraction, which impacts potential down-stream uses of the biopolymers produced by the process. The data suggests that the use of chemical additives which would break bonds that exist between the lignin and hemicellulose might improve the purity of the resulting product, but may not be able to disrupt the highly physically-entangled biopolymer network sufficiently to facilitate their separation.

Wang, Hui [University of Alabama, Tuscaloosa] [University of Alabama, Tuscaloosa; Gurau, Gabriela [University of Alabama, Tuscaloosa] [University of Alabama, Tuscaloosa; Pingali, Sai Venkatesh [ORNL] [ORNL; O'Neil, Hugh [ORNL] [ORNL; Evans, Barbara R [ORNL] [ORNL; Urban, Volker S [ORNL] [ORNL; Heller, William T [ORNL] [ORNL; Rogers, Robin D [University of Alabama, Tuscaloosa] [University of Alabama, Tuscaloosa

2014-01-01T23:59:59.000Z

67

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

SciTech Connect (OSTI)

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

Hsieh, W.C.

1981-01-01T23:59:59.000Z

68

The Behaviour of Electrolytes in Mixed Solvents. Part I. The Free Energies and Heat Contents of Hydrogen Chloride in Water-Ethyl Alcohol Solutions  

Science Journals Connector (OSTI)

1 November 1929 research-article The Behaviour of Electrolytes in Mixed Solvents. Part I. The Free Energies and Heat Contents of Hydrogen Chloride in Water-Ethyl Alcohol Solutions J. A. V. Butler C. M. Robertson The Royal Society...

1929-01-01T23:59:59.000Z

69

Beneficial Effect of Nanoclay in Atom Transfer Radical Polymerization of Ethyl Acrylate:? A One Pot Preparation of Tailor-Made Polymer Nanocomposite  

Science Journals Connector (OSTI)

Beneficial Effect of Nanoclay in Atom Transfer Radical Polymerization of Ethyl Acrylate:? A One Pot Preparation of Tailor-Made Polymer Nanocomposite ... Nanoclays [Cloisite 30B, Cloisite NA+, and Cloisite 20A] were supplied by Southern Clay products, Gonzales, TX. ...

Haimanti Datta; Nikhil K. Singha; Anil K. Bhowmick

2007-12-12T23:59:59.000Z

70

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

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

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

71

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

72

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

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

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

73

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

74

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

75

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

76

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

77

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

78

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

79

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 (OSTI)

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

80

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 (OSTI)

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

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

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

82

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

83

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

84

Complete oxidation of CO, ethanol, and ethyl acetate over copper oxide supported on titania and ceria modified titania  

SciTech Connect (OSTI)

Titania and titania modified with 3 and 12 {mu}mol Ce/m{sup 2} surface area of the titania were prepared and were used as supports for copper oxide. Preparations with 3 and 12 {mu}mol CuO{sub x}/m{sup 2} surface area of the support were tested for the combustion of CO, ethyl acetate, and ethanol. The results show that the Ce-doped titania surface is good as support for CuO{sub x} and that the cerium not only enhances the activity of the copper species, but also stabilizes the surface area of the TiO{sub 2} support in the presence of copper oxide. Additions of Al, K, and La are also found to stabilize the TiO{sub 2} support but, compared with Ce, these elements do not to the same extent enhance the activity of the copper species. Acetaldehyde is observed to ban an intermediate in the combustion of both ethanol and ethyl acetate over Cu-Ce-Ti-O catalysts. Since acetaldehyde is more harmful than any of the reactants and also is photochemically active, it is in applications important to assure that the combustion is complete. Cu-Ce-Ti-O catalysts show good performance not only for feeds without water vapor, but also for humid feeds. Although the concentrations of intermediates are affected by the addition of water, there is little effect on the temperature required for obtaining complete conversion to carbon dioxide and water. Characterization with XRD, FT-Raman, TPR, and XPS indicates that the dispersed copper species are in the form of patches or a bidimensional layer which interacts with the surface of the support. When the content of cerium and copper is low, other types of dispersed copper species are present, which possibly are monomers or dimers. The copper species are predominantly Cu{sup 2+} species.

Larsson, P.O. [Perstorp AB (Sweden)] [Perstorp AB (Sweden); Andersson, A. [Univ. of Lund (Sweden). Dept. of Chemical Engineering II] [Univ. of Lund (Sweden). Dept. of Chemical Engineering II

1998-10-01T23:59:59.000Z

85

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

86

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

87

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

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

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

88

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

89

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

90

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

91

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

92

Phase 1 Methyl Iodide Deep-Bed Adsorption Tests  

SciTech Connect (OSTI)

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

93

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

94

C(sp2)?C(sp3) Rotational Barriers in Simple Amides:? H2N?C(O)R (R = Methyl, Ethyl, i-Propyl, tert-Butyl)  

Science Journals Connector (OSTI)

(a) Cuillerdier, C.; Musikas, C.; Hoel, P.; Nigond, L.; Vitart, X. Sep. ... (f) Cuillerdier, C.; Musikas, C.; Nigond, L. Sep. ... (i) Nigond, L.; Musikas, C.; Cuillerdier, C. Solv. ...

Giovanni Sandrone; David A. Dixon; Benjamin P. Hay

1999-02-03T23:59:59.000Z

95

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

96

Global methylation responses to low dose radiation exposure  

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

97

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

98

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

99

Role of methyl nitrate in plasma exhaust treatment  

SciTech Connect (OSTI)

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

100

Evaluation of the 3M Organic Vapor Monitor #3500 as a sampling device for ethyl acrylate and the effect of discontinued exposure on vapor retention  

E-Print Network [OSTI]

Sampling Theories of Adsorption Forces of Adsorption Activation Procedures Surface Structure Statement of Hypotheses METHODOLOGV Test Atmosphere Generation Exposure Chamber MIRAN Calibration and Use Monitor Exposure to EA Analytical Procedures...EVALUATION OF THE 3M ORGANIC VAPOR MONITOR 53500 AS A SAMPLING DEVICE FOR ETHYL ACRYLATE AND THE EFFECT OF DISCONTINUED EXPOSURE ON VAPOP, RETENTION A Thesis by ROBERT WAYNE BARR Submitted to the Graduate College of Texas Al!M University...

Barr, Robert Wayne

2012-06-07T23:59:59.000Z

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

Detection of chlorpyrifos-ethyl (Dursban) and its metabolites in urine samples using immunoassays with confirmation by gas chromatography/mass spectrometry  

E-Print Network [OSTI]

by The Dow Chemical Company. ' In 1986, when regulatory measures restricted chlordane usage, Dursban (a 5% formulation of chlorpytifos-ethyl) became popular for termite control. Since chlotpyrifoswthyl is effective against a wide range of insects... (O, O-diethyl phosphate) and DETP (O, O-diethyl phosphorothioate). " A study involving termite control workers concluded that urinary alkyl phosphate levels would be a useful index in biological monitoring of chlorpyrifos exposuie: maximum DETP...

Clewis, Suenda Beth

1995-01-01T23:59:59.000Z

102

"Seeing" Mercury Methylation in Progress  

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

103

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

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

104

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

SciTech Connect (OSTI)

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

105

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

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

106

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

107

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

108

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

109

Ethyl Alcohol Production.  

E-Print Network [OSTI]

-1/2 bushel batch. 2. The ground grain is added to and mixed with 150 gallons of water (12 gallons per bushel) at 120 degrees F. This begins the cooking process, during which the grain mixture or mash is constantly agitated. A liquefying enzyme (Taka...-1/2 bushel batch. 2. The ground grain is added to and mixed with 150 gallons of water (12 gallons per bushel) at 120 degrees F. This begins the cooking process, during which the grain mixture or mash is constantly agitated. A liquefying enzyme (Taka...

O'Neal, Henry

1981-01-01T23:59:59.000Z

110

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

111

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.

112

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

SciTech Connect (OSTI)

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

113

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

SciTech Connect (OSTI)

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

114

-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

115

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

116

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.

117

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

118

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.

119

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

120

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.

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

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

122

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

123

High Temperature Chemical Kinetic Combustion Modeling of Lightly Methylated Alkanes  

SciTech Connect (OSTI)

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

124

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

125

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

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

126

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

127

GC—MS Analysis of Acylated Derivatives of a Series of Side Chain Regioisomers of 2-Methoxy-4-Methyl-Phenethylamines  

Science Journals Connector (OSTI)

......each amine in 50 L of ethyl acetate followed by addition of large...reconstituted with 200 L of ethyl acetate and 50 L of pyridine. General...which upon reduction with lithium aluminum hydride (LAH) yields...Hays. and R.F. X. Klein. Synthesis and characteriza- tion of......

Tamer Awad; Jack DeRuiter; C. Randall Clark

128

GC-MS Analysis of Acylated Derivatives of the Side-Chain Regioisomers of 4-Methoxy-3-Methyl-Phenethylamines Related to Methylenedioxymethamphetamine  

Science Journals Connector (OSTI)

......amine in 50 L of ethyl acetate followed by the addition...with 200 L of ethyl acetate and 50 L of pyridine. Results and Discussion Synthesis Condensation of the...upon reduction with lithium aluminum hydride (LAH...general procedure for the synthesis of these compounds begins......

Tamer Awad; C. Randall Clark; Jack DeRuiter

2007-09-01T23:59:59.000Z

129

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

130

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

131

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

132

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

133

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

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

134

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

135

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

136

Novel syngas-based process for methyl methacrylate  

SciTech Connect (OSTI)

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

137

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

138

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

139

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

SciTech Connect (OSTI)

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

140

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

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

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

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

142

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

143

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

144

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

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

145

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

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

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

146

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

147

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

148

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

SciTech Connect (OSTI)

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

149

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

150

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

151

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

SciTech Connect (OSTI)

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

152

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

153

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

154

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

155

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

156

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

157

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

158

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

159

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

160

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

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

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

162

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

163

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

164

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.

165

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

166

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

167

Atmospheric Chemistry of Ethyl Propionate  

Science Journals Connector (OSTI)

Atomic chlorine was produced by photolysis of Cl gas (reaction 9) with UV-A light, and OH was generated by photolysis of ozone with UV-C light followed by reaction with water vapor (reactions 10 and 11). ... (9)(10)(11)O3 was generated from O2 with an ozone generator from O3 Technology (model AC-20), and condensed on silica gel that was cooled with ethanol and dry ice to approximately ?70 °C. ... However, we show here a new surface-mediated coupling of nitrogen oxide and halogen activation cycles in which uptake of gaseous NO(2) or N(2)O(5) on solid substrates generates adsorbed intermediates that react with HCl to generate gaseous nitrosyl chloride (ClNO) and nitryl chloride (ClNO(2)), respectively. ...

Vibeke F. Andersen; Kristian B. Řrnsř; Solvejg Jřrgensen; Ole John Nielsen; Matthew S. Johnson

2012-04-23T23:59:59.000Z

168

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

SciTech Connect (OSTI)

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

169

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

170

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

171

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

172

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

173

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

174

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

175

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

176

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

177

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

178

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

179

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

180

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

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

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

182

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

SciTech Connect (OSTI)

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

183

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

184

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

SciTech Connect (OSTI)

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

185

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

186

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

187

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

188

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

SciTech Connect (OSTI)

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

189

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

SciTech Connect (OSTI)

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

190

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

191

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

SciTech Connect (OSTI)

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

192

Short Time Dynamics of Ionic Liquids in AIMD-Based Power Spectra  

Science Journals Connector (OSTI)

Short Time Dynamics of Ionic Liquids in AIMD-Based Power Spectra ... A Car-Parrinello study of 1-ethyl-3-methyl-imidazolium chloride water mixture ...

Katharina Wendler; Martin Brehm; Friedrich Malberg; Barbara Kirchner; Luigi Delle Site

2012-04-04T23:59:59.000Z

193

Reaction of Cp*3Co3(.mu.3-CCH3)(.mu.3-H) with (Trimethylsilyl)diazomethane and Ethyl Diazoacetate: Facile Hydrogen Transfer Forms the Diazenide Clusters Cp*3Co3(.mu.3-CCH3)(.mu.3-.eta.1-NNCH2SiMe3) and Cp*3Co3(.mu.3-CCH3)(.mu.3-.eta.1-NNCH2CO2Et)  

Science Journals Connector (OSTI)

Reaction of Cp*3Co3(.mu.3-CCH3)(.mu.3-H) with (Trimethylsilyl)diazomethane and Ethyl Diazoacetate: Facile Hydrogen Transfer Forms the Diazenide Clusters Cp*3Co3(.mu.3-CCH3)(.mu.3-.eta.1-NNCH2SiMe3) and Cp*3Co3(.mu.3-CCH3)(.mu.3-.eta.1-NNCH2CO2Et) ...

Charles P. Casey; Ross A. Widenhoefer; Randy K. Hayashi

1995-04-01T23:59:59.000Z

194

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

195

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.

196

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

197

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

198

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

199

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

200

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

Science Journals Connector (OSTI)

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

Tarun Kumar Misra; Chittaranjan Sinha

1999-04-01T23:59:59.000Z

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

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

202

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

203

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

204

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

205

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

206

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

207

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

SciTech Connect (OSTI)

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

208

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

209

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

SciTech Connect (OSTI)

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

210

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

211

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

212

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

SciTech Connect (OSTI)

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

213

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

214

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

215

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

216

Embedded Piezoresistive Microcantilever Sensors Functionalized for the Detection of Methyl Salicylate  

SciTech Connect (OSTI)

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

217

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

SciTech Connect (OSTI)

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

218

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

219

Permanently charged tamoxifen derivatives: Chemical characterization, transcriptional activity, and biological effects  

Science Journals Connector (OSTI)

...methyl iodide, methyl bromide, ethyl bromide, isopropyl bromide, propyl bromide and butyl bromide) were obtained by SN2 reaction. Chemical structures were determined by NMR, electron microscopy and X-Ray diffraction. Biological effects: Binding...

Claudia Rivera Guevara; Rocio Garcia; Fernando Larrea; Martha S. Morales-Rios; Elizabeth Hermandez-Gallegos; David Barrera; Sandra Valencia; Victor Perez; and Javier Camacho

2007-11-01T23:59:59.000Z

220

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

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

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

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

222

Acute, sub-acute and general pharmacological evaluation of 5-(3,4-methylenedioxyphenyl)-4-ethyl-2E,4E-pentadienoic acid piperidide (SK-20): A novel drug bioavailability enhancer  

Science Journals Connector (OSTI)

An efflux pump inhibitor, SK-20 (5-(3,4-methylenedioxyphenyle)-4 ethyl-2E,4E-pentadienoic acid piperidide), was assessed for its toxicity at three different pharmacological profiles: acute, sub-acute and general pharmacology with pharmacokinetics. In acute study, the SK-20 was found safe up to a dose of 2000 mg/kg (b.wt.); and at sub-acute, dosages of 50 and 100 mg/kg (b.wt.) were found to be safe. However, dosages of 200 mg or above per kg (b.wt.) showed some morphological alterations in cellular architecture of both liver and kidneys in both sexes, viz., mild vascular congestion along with sporadic hemorrhages and infiltration into renal and hepatic parenchyma by mononucleate cell. General pharmacological studies did not result into any alterations in analgesic, convulsions, rectal temperatures and in the rhythm or the rate of the intestinal motility or the secretion of the bile. While the respiratory and the cardiac rate remained normal, the only parameter to show was the blood pressure, which at all the doses tested, showed a tendency toward reduction. Characteristically, the SK-20 at all doses influenced pentobarbital-induced hypnosis positively and negatively to spontaneous motor activity in a dose dependent manner. Pharmacokinetics of SK-20 revealed it to have retention time at 10.2 min and half life 2.47 h.

Sheikh Rayees; Rohit Sharma; Gurdarshan Singh; Ishtiyaq Ahmad Najar; Amarinder Singh; Dastagir Basheer Ahamad; Subash Chander Sharma; Manoj Kumar Tikoo; Vijay Kumar Gupta; Payare Lal Sangwan; Surjeet Singh; Surinder Koul; Rakesh Kamal Johri

2013-01-01T23:59:59.000Z

223

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

224

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

225

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

226

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

227

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

228

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

SciTech Connect (OSTI)

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

229

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

SciTech Connect (OSTI)

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

230

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

231

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

SciTech Connect (OSTI)

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

232

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

233

NOx Reduction from Biodiesel Fuels  

Science Journals Connector (OSTI)

NOx Reduction from Biodiesel Fuels ... NOx emissions appear to be different for biodiesels from different feedstocks. ... For the suite of biodiesels prepared from nearly pure fatty acids, all biodiesel fuels produced higher NOx than certification diesel with the following exceptions:? methyl palmitate, methyl laurate, ethyl stearate, and the ethyl ester of hydrogenated soybean oil. ...

Sandun Fernando; Chris Hall; Saroj Jha

2005-11-19T23:59:59.000Z

234

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

SciTech Connect (OSTI)

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

235

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

SciTech Connect (OSTI)

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

236

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

237

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

238

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

239

Combustion Characteristics of Tricomponent Fuel Blends of Ethyl Acetate, Ethyl Propionate, and Ethyl Butyrate in Homogeneous Charge Compression Ignition (HCCI)  

Science Journals Connector (OSTI)

Their proportions in the mixture vary according to fermentation conditions and biomass feedstocks. ...

Francesco Contino; Fabrice Foucher; Christine Mounaďm-Rousselle; Hervé Jeanmart

2011-03-09T23:59:59.000Z

240

Large scale total synthesis of apoptolidinone and progress towards the total synthesis of ammocidin  

E-Print Network [OSTI]

chapter: aldehyde 3.8 (C14-C19) was synthesized via Sharpless asymmetric epoxidation; ethyl ketone 3.9’ (C20-C28) was prepared via Kobayashi and Crimmins’s asymmetric aldol methodologies; aldehyde 3.14 (C7-C13) was generated by Brown crotylation and cross...

Liu, Qingsong

2009-05-15T23:59:59.000Z

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

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

SciTech Connect (OSTI)

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

242

Viscosity of gaseous ethyl fluoride (HFC-161)  

Science Journals Connector (OSTI)

Abstract The paper describes an improved Maxwell type oscillating-disk viscometer. The experimental system was calibrated by argon, carbon dioxide, nitrogen, hydrogen and verified by nitrogen. The viscosities of gaseous HFC-161 were measured from 293 K to 369 K at pressures from 0.1 MPa up to the saturated vapor pressure. An empirical viscosity equation is proposed to interpolate the present experimental data as a function of density and temperature. The uncertainty of the reported viscosity was estimated to be within 1%.

Shaohua Lv; Xiaoming Zhao; Chuanqi Yao; Wei Wang; Zhikai Guo

2014-01-01T23:59:59.000Z

243

Sandia National Laboratories: fatty acid ethyl esters  

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

Doppler Velocimeter EC Top Publications A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study Nonlinear Time-Domain...

244

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 (OSTI)

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

245

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 (OSTI)

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

246

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

247

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

248

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

249

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

250

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

251

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

252

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

253

Isobutanol-methanol mixtures from synthesis gas. Quarterly technical progress report, 1 January--31 March 1996  

SciTech Connect (OSTI)

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

254

Effect of organic-vapor mixtures on the service life of respirator cartridges. Part 1  

SciTech Connect (OSTI)

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

255

VOC recovery using microwave regeneration of adsorbents: Pilot-column studies  

SciTech Connect (OSTI)

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

256

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

257

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

258

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

259

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

260

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

Note: This page contains sample records for the topic "methyl ethyl 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.


261

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

262

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

263

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

264

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

265

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

266

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

267

The Risk Assessment Information System  

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

268

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

SciTech Connect (OSTI)

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

269

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

270

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

271

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

272

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

273

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

274

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

275

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

276

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

277

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

SciTech Connect (OSTI)

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

278

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

279

CO2-limitation-inducible Green Recovery of fatty acids from cyanobacterial biomass  

Science Journals Connector (OSTI)

...other microbial bioreactors such as algae, E. coli, and yeast...fatty acyl methyl, or ethyl esters (biodiesel), and alkanes...Green Recovery is introduced into algae. Fig. S1. One fluorescence microscopy...

Xinyao Liu; Sarah Fallon; Jie Sheng; Roy Curtiss III

2011-01-01T23:59:59.000Z

280

HPLC analysis of tonka bean extracts  

Science Journals Connector (OSTI)

Based on the results of GC-MS analysis, an HPLC procedure was developed for the determination of coumarin, dihydrocoumarin, melilotic acid (o...-dihyd-rocoumaric acid), methyl melilotate, ethyl melilotate, 5-hydroxymethylfurfural

Dorothea Ehlers; Michael Pfister…

1995-01-01T23:59:59.000Z

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

Life-cycle Assessment of Semiconductors  

E-Print Network [OSTI]

of isopropyl alcohol (IPA), CO, NO X , ethyl lactate andHMDS: hexa-methyl disilizane IPA: isopropyl alcohol OMCTS:liquid H 2 SO 4 HCl NH 4 OH IPA oxide CMP slurry, chemicals

Boyd, Sarah B.

2009-01-01T23:59:59.000Z

282

Thermal instabilities of organic carbonates with discharged cathode materials in lithium-ion batteries  

Science Journals Connector (OSTI)

Thermal instability of lithiated cathode materials with organic...4, LiMn2O4, and LiCoO2...were mixed with diethyl carbonate, dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate, and propylene carbonat...

Wei-Jie Ou; Chen-Shan Kao; Yih-Shing Duh…

2014-06-01T23:59:59.000Z

283

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

284

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

SciTech Connect (OSTI)

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

285

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

SciTech Connect (OSTI)

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

286

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 (OSTI)

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

287

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

288

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

289

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

290

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

291

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

292

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

293

PMo or PW heteropoly acids supported on MCM-41 silica nanoparticles: Characterisation and FT-IR study of the adsorption of 2-butanol  

SciTech Connect (OSTI)

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

294

Energy Balance for Ethyl Alcohol Production from Crops  

Science Journals Connector (OSTI)

...used in agricultural and industrial processing, except the solar energy that the plants use for growth. Moreira and Goldemberg...which they live to-gether in the Serengeti National Park of Tanzania. During the wet season, which extends from November through...

JOSÉ GOMES DA SILVA; GIL EDUARDO SERRA; JOSÉ ROBERTO MOREIRA; JOSÉ CARLOS CONÇALVES; JOSÉ GOLDEMBERG

1978-09-08T23:59:59.000Z

295

LIGNIN BIODEGRADATION AND THE PRODUCTION OF ETHYL ALCOHOL FROM CELLULOSE  

E-Print Network [OSTI]

and Moore, W. E. , Removing lignin from wood with white-rotof carbohydrates on lignin degradation by the white-rotP. and Eriksson, K. -E. , Lignin degradation and utilization

Rosenberg, S.L.

2013-01-01T23:59:59.000Z

296

Methylene II. Gas Phase Reactions with Ethyl Chloride  

Science Journals Connector (OSTI)

27 August 1968 research-article Methylene II. Gas Phase Reactions...free-radical mechanism in which CH abstracts a chlorine or a hydrogen atom from C...in electronic structure rather than energy content. The Royal Society is collaborating...

1968-01-01T23:59:59.000Z

297

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

SciTech Connect (OSTI)

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

298

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

SciTech Connect (OSTI)

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

299

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

300

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

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

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

SciTech Connect (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 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

302

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

303

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

304

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

305

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

SciTech Connect (OSTI)

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

306

Supplemental Material for Spessard and Stoltz 1 Supplemental Materials for  

E-Print Network [OSTI]

% yield) that was used without further purification. RF = 0.5 (30% ethyl acetate in hexanes eluent); FTIR, 29.18 mmol, 1.0 equiv) in dry THF (100 mL) was added methyl lithium (34 mL, 1.3 M in Et2O, 43.77 mmol was purified by silica gel chromatography (10% ethyl acetate in hexanes eluent) to afford enone 12 as a yellow

Stoltz, Brian M.

307

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

308

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.

309

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

310

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

311

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

312

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

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

313

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

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

314

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

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

315

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

316

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

317

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

SciTech Connect (OSTI)

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

318

The Risk Assessment Information System  

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

319

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

320

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 (OSTI)

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

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

An Examination of the Thermodynamics of Fusion, Vaporization, and Sublimation of Several Parabens by Correlation Gas  

E-Print Network [OSTI]

An Examination of the Thermodynamics of Fusion, Vaporization, and Sublimation of Several Parabens, Kasetsart University, Bangkane, Bangkok 10900, Thailand 2 Department of Chemistry and Biochemistry.com). DOI 10.1002/jps.22423 ABSTRACT: The vaporization, fusion, and sublimation enthalpies of methyl, ethyl

Chickos, James S.

322

E-Print Network 3.0 - aminoethanesulfonic acid Sample Search...  

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

methyl-2- aminoethane-sulfonic acid, 8 trehalose, 10 glucose, 26 NaHCO3, 1 NaH2PO4, 1.5 CaCl2, and 4 Mg... 0 100 150 0 10 20 Benzaldehyde 1-butanol Butyric acid Ethyl acetate...

323

SPME in Environmental Analysis: Biotransformation Pathways  

Science Journals Connector (OSTI)

......SPMEGCMS to study the degradation of ethyl benzene using...methyl-t-butyl ether and its degradation products, t-butyl...food by determining degradation products and other released...Bitumen is a fossil fuel rich in sulfur, which...Aliquots of the cell suspension (2 mL......

Annamaria Halasz; Jalal Hawari

2006-08-01T23:59:59.000Z

324

Bibliography and Index of the Literature on Gas Chromatography—1964 November 1, 1963 to November 1, 1964  

Science Journals Connector (OSTI)

......Haus, Joseph B., Manolev, Lazar, and Price, Robert W. J. Assoc. Offic. Agr...Nov. 1963) 723 CHEMICAL CHANGE OF ETHYLENE GLYCOL INDUCED BY GAMMA RAPS, Hir- ota...INDUCED REACTION BE- TWEEN ACETALDEHYDE AND ETHYLENE- MAINLY ON THE PRODUCTION OF METHYL ETHYL......

Mignon Gill; Seaton T. Preston; Jr.

1964-12-01T23:59:59.000Z

325

Preparation and evaluation of 3-methyl isomers of 15-(p-iodophenyl)-3-methylpentadecanoic acid (BMIPP): 3R-BMIPP shows greater heart uptake than 3S-BMIPP in rats  

SciTech Connect (OSTI)

Iodine-123 racemic (3-R,S) BMIPP is of widespread interest for evaluation of myocardial viability. To evaluate the effects of the asymmetric C-3 center of BMIPP on heart uptake/clearance we have resolved and characterized 3R- and 3S-BMIPP (H-1 and C-13 NMR, MS, HPLC, [{alpha}], m.p.) and evaluated the radioiodinated isomers in rats. A thiophene {open_quotes}template{close_quotes} approach using ethyl 3R-methylglutarate was used to synthesize the authentic 3R-BMPPA substrate (mp 41-42 {degrees}C, [{alpha}] + 1.45 {degrees}). Reaction of racemic 3-R, S-BNPPA with S-(-)-{alpha}-methylbenzylamine gave the diastereomeric amides, separated by TLC, column or HPLC. The more polar isomer was identical to the amide prepared from the 3R-isomer. HCI cleavage of the purified diastereomers provided 3R- and 3S-BMPPA (mp 40-41 {degrees}C, [{alpha}] - 3.90 {degrees}). Iodination (TTFAA/KI) gave 3R-BMIPP (mp 51-52 {degrees}C, [{alpha}] + 0.74 {degrees}) and 3S-BMIPP (mp 45-46 {degrees}C, [{alpha}] - 1.67 {degrees}), which formed amides identical with the two amides separated from the 3-R, S-BMIPP amide mixture. A [I-125]-3R-BMIPP and [I-131]-3S-BMIPP mixture was administered to groups of fasted rats (n = 5/group) sacrificed at 5, 15, 60 and 180 minutes. While blood levels and uptake and clearance from liver, lungs and kidney were nearly identical for both isomers, 3R-BMIPP had higher heart uptake at all periods evaluated (%ID/gram, i.e., 15 min: 3R = 5.25 {plus_minus} 0.77, 3S= 4.51 {plus_minus} 0.50; 180 min: 3R = 2.31 {plus_minus} 0.51, 3S = 1.98 {plus_minus} 0.26), suggesting that transport into the myocytes is different for the isomers. Higher heart uptake suggests that the 3R-BMIPP isomer should be further evaluated.

Knapp, F.F.R. Jr.; Lin, Q.; Luo, H. [Oak Ridge National Lab., TN (United States)] [and others

1996-05-01T23:59:59.000Z

326

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

327

Direct Determination of Ethyl Glucuronide and Ethyl Sulfate in Postmortem Urine Specimens Using Hydrophilic Interaction Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......presence of ETG and ETS in wine at concentrations of 0.153...ratio in order to ensure the quality of IPs, and the ratio should...other CNS active drugs can increase the risk of intoxication and...causing death where ethanol may increase toxicity as an addi- tive......

Ahmed I. Al-Asmari; Robert A. Anderson; Patrik Appelblad

2010-06-01T23:59:59.000Z

328

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 (OSTI)

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

329

Thermodynamic properties of organic oxygen compounds XLIII. Vapour pressures of some ethers  

Science Journals Connector (OSTI)

Vapour pressures of methyl propyl, isopropyl methyl, butyl methyl, ethyl propyl, t-butyl methyl, dipropyl, di-isopropyl, di-t-butyl, and decyl methyl ethers were measured at pressures up to 205 kPa. The measured values were fitted by Antoine and by Chebyshev equations, values already published from this laboratory for three aromatic ethers were recomputed uniformly with the present results, and published values for four additional compounds were incorporated in a scheme for correlation of the vapour pressures of ethers. Estimates were made of the vapour pressures of 10 other ethers. Between 5 and 200 kPa the vapour pressures of ethers may be represented by a single equation in which carbon number or an effective carbon number is a parameter. Chebyshev equations are given for interpolation between the upper bounds of the measurements and the critical pressures of 11 ethers for which this property has been previously determined.

D Ambrose; J.H Ellender; C.H.S Sprake; R Townsend

1976-01-01T23:59:59.000Z

330

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

SciTech Connect (OSTI)

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

331

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

332

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.

333

Preliminary screening of alternative technologies to incineration for treatment of chemical-agent-contaminated soil, Rocky Mountain Arsenal  

SciTech Connect (OSTI)

In support of the U.S. Army`s efforts to determine the best technologies for remediation of soils, water, and structures contaminated with pesticides and chemical agents, Argonne National Laboratory has reviewed technologies for treating soils contaminated with mustard, lewisite, sarin, o-ethyl s-(2- (diisopropylamino)ethyl)methyl-phosphonothioate (VX), and their breakdown products. This report focuses on assessing alternatives to incineration for dealing with these contaminants. For each technology, a brief description is provided, its suitability and constraints on its use are identified, and its overall applicability for treating the agents of concern is summarized. Technologies that merit further investigation are identified.

Shem, L.M.; Rosenblatt, D.H.; Smits, M.P.; Wilkey, P.L.; Ballou, S.W.

1995-12-01T23:59:59.000Z

334

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

335

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.

336

Phytoremediation of Ionic and Methyl Mercury P  

SciTech Connect (OSTI)

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

337

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

338

Synthesis of ethyl N-carbobenzoxy-L-valyl-L-valyl-4-amino-3-hydroxyoctanoate  

E-Print Network [OSTI]

~~I~H2~mH~~~H~I?H CH2~0H Figure 1. Structure of isovaleryl-L-valyl-L-valyl-(3S, 4S)-statyl-L-alanyl-(3S, 4S)-statine (pepstatin). Table I. Biological Activity of Pepstatin and Analogs 1 compounds I050 (ug/ml ) pepsin cathepsin D renin AHMHA IVA...-Val-Val Ac-Ala-AHMHA Ac-Leu-AHMHA Ac-Val-AHMHA IVA-Val-AHMHA-Val-AHMHA IVA-Val-Val-AHMHA-Ala-AHMHA &250 &250 26 9. 3 2. 4 0. 01 0. 01 &250 &250 280 8. 5 4. 4 0. 05 0. 005 &250 &250 &250 &250 &250 &250 4. 5 a ID50...

Chesky, Elizabeth Gourley

1982-01-01T23:59:59.000Z

339

E-Print Network 3.0 - alcohol ethyl alcohol Sample Search Results  

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

By The University of Texas at Arlington Police Department... 817-272-3381 Tips for Young Adults: The Truth about Alcohol If you are the victim of a crime on the U... . One...

340

Direct Catalytic Asymmetric Aldol-Type Reaction of Aldehydes with Ethyl  

E-Print Network [OSTI]

high stereocontrol in these processes, considering the requirement of atom efficiency, it would be more of China wangjb@pku.edu.cn Received February 24, 2003 ABSTRACT The direct aldol-type condensation. Because the aldol reaction is generally considered as one of the most powerful and efficient C-C bond

Wang, Jianbo

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

A theoretical analysis of the reaction between ethyl and molecular oxygen  

SciTech Connect (OSTI)

Using a combination of electronic-structure theory, variational transition-state theory, and solutions to the time-dependent master equation, the authors have studied the kinetics of the title reaction theoretically over wide ranges of temperature and pressure. The agreement between theory and experiment is quite good. By comparing the theoretical and experimental results describing the kinetic behavior, they have been able to deduce a value for the C{sub 2}H{sub 5}-O{sub 2} bond energy of {approximately}34 kcal/mole and a value for the exit-channel transition-state energy of {minus}4.3 kcal/mole (measured from reactants). These numbers compare favorably with the electronic-structure theory predictions of 33.9 kcal/mole and {minus}3.0 kcal/mole, respectively. The master-equation solutions show three distinct temperature regimes for the reaction, discussed extensively in the paper. Above T {approx} 700 K, the reaction can be written as an elementary step, C{sub 2}H{sub 5} + O{sub 2} {leftrightarrow} C{sub 2}H{sub 4} + HO{sub 2}, with the rate coefficient, k(T) = 3.19 x 10{sup {minus}17} T{sup 1.02} exp(2035/RT) cm{sup 3}/molec.-sec., independent of pressure even though the intermediate collision complex may suffer a large number of collisions.

James A. Miller; Stephen J. Klippenstein; Stuart H. Robertson

2000-12-13T23:59:59.000Z

342

Hydrogenated soy ethyl ester (HySEE) from ethanol and waste vegetable oil  

SciTech Connect (OSTI)

Biodiesel is gaining recognition in the United States as a renewable fuel which may be used as an alternative to diesel fuel without any modifications to the engine. Currently the cost of this fuel is the factor that limits its use. One way to reduce the cost of biodiesel is to use a less expensive form of vegetable oil such as waste oil from a processing plant. These operations use mainly hydrogenated soybean oil, some tallow and some Canola as their frying oils. It is estimated that there are several million pounds of waste vegetable oil from these operations. Additional waste frying oil is available from smaller processors, off-grade oil seeds and restaurants. This paper reports on developing a process to produce the first 945 liters (250 gallons) of HySEE using recipes developed at the University of Idaho; fuel characterization tests on the HySEE according to the ASAE proposed Engineering Practice for Testing of Fuels from Biological Materials, X552; short term injector coking tests and performance tests in a turbocharged, DI, CI engine; and a 300 hour screening test in a single cylinder, IDI, CI engine.

Peterson, C.; Reece, D.; Thompson, J. [Univ. of Idaho, Moscow, ID (United States)] [and others

1995-11-01T23:59:59.000Z

343

Enrichment, isolation and characterization of fungi tolerant to 1-ethyl-3-methylimidazolium acetate  

E-Print Network [OSTI]

Davis, 95616; Biomass Science and Conversion Technologybiomass is a potential renewable feedstock that is available for conversion

Singer, S.W.

2012-01-01T23:59:59.000Z

344

Inhibitory Effects of Plant-Derived Flavonoids and Phenolic Acids on Malonaldehyde Formation from Ethyl Arachidonate  

Science Journals Connector (OSTI)

The antioxidant activities of the flavones and flavonols decreased in the following order:? luteolin > rhamnetin > fisetin > kaempferol > morin > quercetin. ... It was also reported that caffeic acid is more effective than ferulic acid against lipid peroxyl radicals generated in the lipophilic phase of low-density lipoproteins (LDL) and in protecting LDL cholesterol from oxidation (36). ...

Kwang-Geun Lee; Takayuki Shibamoto; Gary R. Takeoka; Sung-Eun Lee; Jeong-Han Kim; Byeoung-Soo Park

2003-10-22T23:59:59.000Z

345

SEC data for polymer 1, 2 (R= 2-ethyl-hexyl) and 3  

E-Print Network [OSTI]

performance shown: Solar cells based on copolymers of benzothiadiazole and thiophene Eva Bundgaard a,b and Frederik C. Krebs a a Polymer Solar Cell Initiative, The Danish Polymer Centre, Risø National Laboratory Universitycenter, Universitetsvej 1, PO Box 260, DK-4000 Roskilde, Denmark. IV-curves for the polymer 1 (a) and 3

346

Copper-Catalyzed Addition of Ethyl Diazoacetate to Furans:? An Alternative to Dirhodium(II) Tetraacetate  

Science Journals Connector (OSTI)

A.C. thanks the MCYT and M.M.D.R. thanks the Ramón y Cajal Program for a research fellowship. ... (d) Wenker, E.; Khatuya, H.; Klein, P. S. Tetrahedron Lett. ...

Ana Caballero; M. Mar Díaz-Requejo; Swiatoslaw Trofimenko; Tomás R. Belderrain; Pedro J. Pérez

2005-06-29T23:59:59.000Z

347

Rate of isomerization of triethyl phosphite to diethyl ethylphosphonate in the presence of ethyl iodide  

E-Print Network [OSTI]

Wbnsov. Eswevaz; vms. Attic hIInetie' gate ce'ether'gamest svidenss has been yvesented, to saypaA this view ' 'Xhzss, yspcnrs in selatiwelp ebsscwre gecLcnals~ @~ with tbs Rinetio's, of tbs msaetien, have spys~. Ths finest was bg S~shi mk ' aod M... (gggseeqj g~) esStJe@j. eely, at $~ ~9M gsSttge ecssse54~%hloge, Xzk Cge p&5seaS Qeeey lj&I55 sgSSleetfo@ pe&We" +. oz'@QP se cia~ bg' Qg lgit4sl 4iLe4~isp~w liI? Vis 8?p8pisssatel ~s ezgh ae a. 'yo@ew4@t Z. sstgm ~P L@ %he'fatggel 4o~t eee " es' ~54:. v...

Zerwekh, Ralph Edwin

2012-06-07T23:59:59.000Z

348

E-Print Network 3.0 - arrhizus ethyl esters Sample Search Results  

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

Rhizopus arrhizus fungal biomass. Biosorption was not considered globally... groups; Sorption capacity; Rhizopus arrhizus fungal biomass 1. Introduction The influential role of...

349

?9-Tetrahydrocannabinol and Ethyl Alcohol: Evidence for Cross-Tolerance in the Rat  

Science Journals Connector (OSTI)

...332 (1968). 3. R. K. Kubena and H. Barry ill, J. Pharmacol. Exp. Ther. 173, 94 (1970); B. C. Bose, A. W. Saifi, A. W. Bhagwat, Arch. Int. Pharmacodyn. Ther. 141, 520 (1963). 4. H. I. Bicher and R. Mechoulam, Arch. Int...

L. Michael Newman; Michael P. Lutz; Michael H. Gould; Edward F. Domino

1972-03-03T23:59:59.000Z

350

Electronic Structure and Spectroscopic Analysis of 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide Ion Pair  

Science Journals Connector (OSTI)

High purity [EMIM+][NTf2–] was obtained as a generous gift by Boulder Ionics. ... Li, G.; Parimal, K.; Vyas, S.; Hadad, C. M.; Flood, A. H.; Glusac, K. D.Pinpointing the Extent of Electronic Delocalization in the Re(I)-to-tetrazine Charge-separated Excited State using Time-resolved Infrared Spectroscopy J. Am. ...

Shubham Vyas; Christopher Dreyer; Jason Slingsby; David Bicknase; Jason M. Porter; C. Mark Maupin

2014-08-01T23:59:59.000Z

351

Two Types of Intramolecular Lewis-Base Adducts with the [2-(Dimethylamino)ethyl]cyclopentadienyl Ligand  

E-Print Network [OSTI]

/or carbide-forming metals are involved.3 We were therefore led to investigate some organonickel com- plexes applied. A dead-time delay of 10 µs and a pulse repetition time of 200 Organo Group 13 Transition Metal ring.1 Jutzi et al. have been studying a number of metal complexes bearing this Lewis base

Bluemel, Janet

352

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

353

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

354

A Detailed Chemical Kinetic Reaction Mechanism for Oxidation of Four Small Alkyl Esters in Laminar Premixed Flames  

SciTech Connect (OSTI)

A detailed chemical kinetic reaction mechanism has been developed for a group of four small alkyl ester fuels, consisting of methyl formate, methyl acetate, ethyl formate and ethyl acetate. This mechanism is validated by comparisons between computed results and recently measured intermediate species mole fractions in fuel-rich, low pressure, premixed laminar flames. The model development employs a principle of similarity of functional groups in constraining the H atom abstraction and unimolecular decomposition reactions in each of these fuels. As a result, the reaction mechanism and formalism for mechanism development are suitable for extension to larger oxygenated hydrocarbon fuels, together with an improved kinetic understanding of the structure and chemical kinetics of alkyl ester fuels that can be extended to biodiesel fuels. Variations in concentrations of intermediate species levels in these flames are traced to differences in the molecular structure of the fuel molecules.

Westbrook, C K; Pitz, W J; Westmoreland, P R; Dryer, F L; Chaos, M; Osswald, P; Kohse-Hoinghaus, K; Cool, T A; Wang, J; Yang, B; Hansen, N; Kasper, T

2008-02-08T23:59:59.000Z

355

Synthesis of nitrogen heterocycles as potential herbicidal compounds  

E-Print Network [OSTI]

of lsatin in 90% Acetic Acid. . aa ~ ~ ~ e ~ ~ o ~ o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ i ~ o ~ ~ b. Prepared by the Method Reported by Buchmsn and Sargent. . . . ~ ~ e ~ o a ~ ~ a ~ e ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Infrared Spectrum of 6, 8-Dichloro-2-methylcin- choninic... Acido ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ t ~ ~ ~ ~ ~ ~ ~ ~ ~ 4t ~ ~ ~ ~ ~ ~ ~ Page 37 3 ~ Infrared Spectrum oi' the Methyl Ester of 6, 8- Dichloro-2-methylcinchoninic Acid. . . , . ???, ?, ,?? Infrared Spectrum of the Ethyl Ester of 6, 8...

Al-Naji, Hassan Ali

2012-06-07T23:59:59.000Z

356

Total Syntheses of Linear Poly-Thiazole/Oxazole Plantazolicin A and its biosynthetic precursor Plantazolicin B  

E-Print Network [OSTI]

condensed with cysteine ethyl ester hydrochloride salt 15, before oxidation of thiazolidine 25 using manganese dioxide to give thiazole 8 in and overall yield of 42%. This yield was comparable to those obtained previously for 8, but avoided the use... , condensation with cysteine methyl ester hydrochloride 13 and MnO2 mediated oxidation to afford thiazole 4b in an acceptable 41% overall yield. This is a marked improvement on the previous synthesis for related fragments. Removal of all nitrogen protection...

Wilson, Zoe E.; Fenner, Sabine; Ley, Steven V.

2014-11-25T23:59:59.000Z

357

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

358

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

359

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

360

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

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

Co-crystals of an agrochemical active – A pyridine-amine synthon for a thioamide group  

Science Journals Connector (OSTI)

Five novel co-crystals of thiophanate-ethyl (TE), an agrochemical active, with di(2-pyridyl)ketone (1), 2-benzoylpyridine (2), 3-benzoylpyridine (3), 4-phenylpyridine (4) and biphenyl (5) were found and crystal structures of four of them (TE1–TE3, TE5) solved by single crystal X-ray diffraction. Three of the co-crystals (TE1–TE3) form by way of a reliable pyridine-amine hydrogen bond synthon and one (TE5) because of close packing effects. The fifth co-crystal was identified by X-ray powder diffraction. The work demonstrates the usage of a reliable supramolecular synthon for crystal engineering, while concurrently reminds that the close packing of even very similar molecules cannot be fully predicted.

E. Nauha; M. Nissinen

2011-01-01T23:59:59.000Z

362

RECOVERY OF LACTIC ACID FROM AMERICAN CRYSTAL SUGAR COMPANY WASTEWATER  

SciTech Connect (OSTI)

This project has shown that the recovery of several valuable lactic acid products is both technically feasible and economically viable. One of the original objectives of this project was to recover lactic acid. However, the presence of a variety of indigenous bacteria in the wastewater stream and technical issues related to recovery and purification have resulted in the production of lactic acid esters. These esters could by hydrolyzed to lactic acid, but only with unacceptable product losses that would be economically prohibitive. The developed process is projected to produce approximately 200,000 lb per day of lactate esters from wastewater at a single factory at costs that compete with conventional solvents. The lactate esters are good solvents for polymers and resins and could replace acetone, methyl ethyl ketone, MIBK, and other polar solvents used in the polymer industry. Because of their low volatility and viscosity-lowering properties, they will be especially useful for inks for jet printers, alkyl resins, and high-solid paints. Owing to their efficiency in dissolving salts and flux as well as oils and sealants, lactate esters can be used in cleaning circuit boards and machine and engine parts. Unlike conventional solvents, lactate esters exhibit low toxicity, are biodegradable, and are not hazardous air pollutants. Another application for lactate esters is in the production of plasticizers. Severe health problems have been attributed to widely used phthalate ester plasticizers. The U.S. Department of Agriculture showed that replacement of these with inexpensive lactate esters is feasible, owing to their superior polymer compatibility properties. A very large market is projected for polymers prepared from lactic acid. These are called polylactides and are a type of polyester. Thermoplastics of this type have a variety of uses, including moldings, fibers, films, and packaging of both manufactured goods and food products. Polylactides form tough, orientable, self-supporting thin films and have, therefore, been used for adhesives, safety glass, and finishes. If the bacterial culture produces the L-lactic acid enanatiomer form exclusively, the L-lactide prepared from this form can be used for making polymers with good fiber-forming properties. We have not currently achieved the exclusive production of L-lactate in our efforts. However, markets in films and structural shapes are available for polymers and copolymers prepared from the mixed D,L-lactide forms that result from processing the D,L-lactic acid obtained from fermentation such as that occurring naturally in sugar beet wastewater. These materials are slowly biodegraded to harmless compounds in the environment, and they burn with a clean blue flame when incinerated. These materials represent excellent opportunities for utilization of the D,L-lactic mixture produced from natural fermentation of the ACS flume water. Esters can be converted into a lactide, and the alcohol released from the ester can be recycled with no net consumption of the alcohol. Lactide intermediates could be produced locally and shipped to polymer producers elsewhere. The polymer and copolymer markets are extremely large, and the role of lactides in these markets is continuously expanding. The overall process can be readily integrated into existing factory wastewater operations. There are several environmental benefits that would be realized at the factories with incorporation of the lactate recovery process. The process reduces the organic loading to the existing wastewater treatment system that should result in enhanced operability with respect to both solids handling and treated-water quality. A higher-quality treated water will also help reduce odor levels from holding ponds. Several water reuse opportunities are probable, depending on the quality of treated water from the FT process.

Daniel J. Stepan; Edwin S. Olson; Richard E. Shockey; Bradley G. Stevens; John R. Gallagher

2001-04-30T23:59:59.000Z

363

Atmospheric Measurements of Climate-Relevant Species  

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

Atmospheric Measurements of Climate-Relevant Species Atmospheric Measurements of Climate-Relevant Species CDIAC's data collection includes measurements of the following climate-relevant chemical species. A summary of recent greenhouse gas concentrations is also available. To determine how compounds are named, see the CDIAC "Name that compound" page. Butane (C4H10) Carbon Dioxide (CO2) Carbon Isotopes Carbon Monoxide (CO) Carbon Tetrachloride (CCl4) Chlorofluorocarbons Chloroform (CHCl3) Deuterium (2H) Ethane (C2H6) Ethyl Nitrate (C2H5ONO2) Ethyne (C2H2) Fluoroform (CHF3) Halogenated Compounds (modern records) Halons (fluorocarbons) Hydrogen (H2) Hydrochlorofluorocarbons (HCFCs) Hydrofluorocarbons (HFCs) i-Propyl Nitrate (C3H7ONO2) Methane (CH4) Methyl Bromide (CH3Br) Methyl Chloride (CH3Cl) Methyl Chloroform (CH3CCl3)

364

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

365

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

366

Molecular Analysis of Ethyl Methanesulfonate-induced Mutations at the hprt Gene in the Ethyl Methanesulfonate-sensitive Chinese Hamster Cell Line EM-C11 and Its Parental Line CHO9  

Science Journals Connector (OSTI)

...cleophilic centers in the DNA via a SN1 reaction, in which the rate limiting step...selectivity in their alkylation reaction. Since the number of oxygen atoms...67) and follows a mixed SN1/SN2 type reaction. Therefore, EMS also reacts with...

Christel W. Op het Veld; Matgorzata Z. Zdzienicka; Harry Vrieling; Paul H. M. Lohman; and Albert A. van Zeeland

1994-06-01T23:59:59.000Z

367

Steric Effects in Ionic Pairing and Polyelectrolyte Interdiffusion within Multilayered Films: A Neutron Reflectometry Study  

SciTech Connect (OSTI)

Using a series of polycations synthesized by atom transfer radical polymerization (ATRP), we investigate the effects of the polymer charge density and hydrophobicity on salt-induced interdiffusion of polymer layers within polyelectrolyte multilayer (PEM) films. Polycations with two distinct hydrophobicities and various quaternization degrees (QPDMA and QPDEA) were derived from parent polymers of matched molecular weights poly(2-(dimethylamino)ethyl methacrylate) (PDMA) and poly(2-(diethylamino)ethyl methacrylate) (PDEA) by quaternization with either methyl or ethyl sulfate. Multilayers of these polycations with polystyrene sulfonate (PSS) were assembled in low-salt conditions, and annealed in NaCl solutions to induce layer intermixing. As revealed by neutron reflectometry (NR), polycations with lower charge density resulted in a faster decay of film structure with distance from the substrate. Interestingly, when comparing polymer mobility in QPDEA/PSS and QPDMA/PSS films, layer intermixing was faster in the case of more hydrophobic QPDEA as compared to QPDMA, because of the weaker ionic pairing (due to the presence of a bulky ethyl spacer) between QPDEA and PSS.

Xu, Li [Stevens Institute of Technology, Hoboken, New Jersey; Ankner, John Francis [ORNL; Sukhishvili, Prof. Svetlana A. [Stevens Institute of Technology, Hoboken, New Jersey

2011-01-01T23:59:59.000Z

368

Supporting Information for Stoltz et al. SI 1 Development of (Trimethylsilyl)Ethyl Ester Protected Enolates and  

E-Print Network [OSTI]

cm) obtained from Daicel Chemical Industries, Ltd. Analytical SFC was performed with a Mettler SFC-H, or OB-H) columns (4.6 mm x 25 cm) obtained from Daicel Chemical Industries, Ltd. Analytical chiral GC). TLC was performed using E. Merck silica gel 60 F254 precoated glass plates (0.25 mm) and visualized

Stoltz, Brian M.

369

Interaction of Ethyl Chloride with Amorphous Solid Water Thin Film on Ru(001) and O/Ru(001) Surfaces  

E-Print Network [OSTI]

demonstrated for several molecules beside N2 such as CCl4,7 CD3Cl,8 and CO2.9 EC was chosen for this study coverage, respectively. Compression of preadsorbed 0.3 ML EC molecules into small islands on the surface developed above 20 ASW BL. A reversed TPD peak shift of the trapped EC molecules occurs from its compressed

Asscher, Micha

370

Alternative Fuels Data Center: Ethanol and Methanol Tax  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

and Methanol and Methanol Tax to someone by E-mail Share Alternative Fuels Data Center: Ethanol and Methanol Tax on Facebook Tweet about Alternative Fuels Data Center: Ethanol and Methanol Tax on Twitter Bookmark Alternative Fuels Data Center: Ethanol and Methanol Tax on Google Bookmark Alternative Fuels Data Center: Ethanol and Methanol Tax on Delicious Rank Alternative Fuels Data Center: Ethanol and Methanol Tax on Digg Find More places to share Alternative Fuels Data Center: Ethanol and Methanol Tax on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Ethanol and Methanol Tax Ethyl alcohol and methyl alcohol motor fuels are taxed at a rate of $0.08 per gallon when used as a motor fuel. Ethyl alcohol is defined as a motor

371

Method of using polysilane positive photoresist materials  

DOE Patents [OSTI]

New polysilane copolymers comprise recurring units of --Si(X)(Y)-- and Si(A)(B)--, Si(X)(Y) being different from Si(A)(B), wherein X and Y together have 1-13 carbon atoms, and X and Y each independently is hydrogen, alkyl, cycloalkyl, phenyl, alkylphenyl, or phenylalkyl, with the proviso that only one of X and Y contains a phenyl moiety, or together X and Y are an alkylene group forming a ring with the adjoining Si atom, and wherein A and B together have 3-13 carbon atoms, and A and B each independently is alkyl or cycloalkyl, with the proviso (a) that when one of A and B is ethyl, the other is not methyl or ethyl, and (b) that when one of A ad B is n-propyl and the other is methyl, X and Y are not both methyl. Corresponding homopolysilanes are also provided. Upon ultraviolet irradiation, they photodepolymerize to form volatile products. As a result, they represent a new class of photoresists which enable direct formation of a positive image eliminating the heretofore required development step.

Harrah, L.A.; Zeigler, J.M.

1986-05-06T23:59:59.000Z

372

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

373

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

374

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

375

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

376

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

377

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

378

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

379

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

380

Methyl arsenic adsorption and desorption behavior on iron oxides  

E-Print Network [OSTI]

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

Lafferty, Brandon James

2005-08-29T23:59:59.000Z

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

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

382

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

383

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

384

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

385

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

386

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

387

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

388

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

389

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

390

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

391

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

392

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

393

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.

394

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

SciTech Connect (OSTI)

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

395

The Risk Assessment Information System  

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

What's New What's New November 2013 Updates ECO mammalian SSLs were updated for cadmium, antimony , arsenic, inorganic, barium, Beryllium, chromium VI, cobalt, copper, lead, silver, vanadium, cyanide (total complex), methyl mercury, sulfide, thallium and tin. October 2013 Updates The biota intake rates for the radionuclide PRG and risk tools were updated to correct an improper units conversion. September 2013 Updates IRIS updates for 1,4-Dioxane and Biphenyl were completed. PPRTV values have been updated for Biphenyl, 3,4-Dichlorobenzotrifluoride, Trinitrophenylmethylnitramine (Tetryl), Endosulfan Sulfate, 1,1,2,2-Tetrachloroethane, Nitromethane, Dibenzothiophene, 2-Ethoxyethanol, 3,3'-Dimethoxybenzidine, Butylated hydroxytoluene, Ethyl Acetate, tert-Amyl Alcohol, 2,2-Difluoropropane,

396

Effect of pH on the uptake and activity of acifluorfen and 2,4-D  

E-Print Network [OSTI]

, and ammonium chloride (34). Addition of diammonium phosphate and urea-ammonium nitrate fertilizer solution to bentazon (3-(1-methyl- ethyl) ? (1H) -2, 1, 3-benzothiadiazin-4 (3H) -one 2, 2-dioxide) has been shown to increase its uptake and foliar activity... varies with weed species. Common cocklebur degraded 55 percent of the applied acifluorfen compared to 45 percent degradation in common ragweed after seven days. Frear (11) found that 85 to 95 percent of acifluorfen was degraded in 24 h by soybeans...

Simpson, David Michael

1992-01-01T23:59:59.000Z

397

Tracers for monitoring the activity of sodium/glucose cotransporters in health and disease  

DOE Patents [OSTI]

Radiolabeled tracers for sodium/glucose cotransporters (SGLTs), their synthesis, and their use are provided. The tracers are methyl or ethyl pyranosides having an equatorial hydroxyl group at carbon-2 and a C 1 preferred conformation, radiolabeled with .sup.18F, .sup.123I, or .sup.124I, or free hexoses radiolabeled with .sup.18F, .sup.123I, or .sup.124. Also provided are in vivo and in vitro techniques for using these and other tracers as analytical and diagnostic tools to study glucose transport, in health and disease, and to evaluate therapeutic interventions.

Wright, Ernest M; Barrio, Jorge R; Hirayama, Bruce A; Kepe, Vladimir

2014-09-30T23:59:59.000Z

398

Superfund record of decison (EPA Region 3): Aberdeen Proving Ground (Edgewood Area), J-field soil operable unit, Aberdeen Proving Ground, MD, September 27, 1996  

SciTech Connect (OSTI)

This Operable Unit (OU) consists of two main burn pits (the Northern Main Burn Pit and Southern Main Burn Pit). It also includes the Pushout Area, which consists of the O-ethyl-S-(2-iisoprop ylaminoethyl)methyl phosphonothiolate (VX) Burn Pit, the Mustard Burn Pit, and the Liquid Smoke Disposal Pit. This decision document addresses the actions to be taken toward remediating the principal threats provided by high levels of arsenic, lead, and PCBs at the J-Field SOU: (1) the removal of isolated hot spots of contamination from the SOU followed by (2) the construction of a Protective Soil Blanket (PSB) over the J-Field SOU.

NONE

1996-10-01T23:59:59.000Z

399

Directed evolution of phosphotriesterase: towards the efficient detoxification of sarin and soman  

E-Print Network [OSTI]

resulting in an inversion of configuration at the phosphorus center (Lewis et al., 1988). P O O O NO2 H2O -O NO2 O OH O + Scheme 1. The hydrolysis of paraoxon results in p-nitrophenol and diethylphosphate. In terms of tertiary folding, each monomer... in previous studies in which both the substituent size and the binding pocket size were varied (Chen-Goodspeed et al., 2001a,b). The effects of substrates containing either methyl, ethyl, isopropyl, and or phenyl substituents at the phosphorus center were...

Lum, Karin Tien

2004-09-30T23:59:59.000Z

400

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

SciTech Connect (OSTI)

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

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

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

402

Performance and emission characteristics of a diesel engine using esters of palm olein/soybean oil blends  

Science Journals Connector (OSTI)

In this experimental study, the engine performance and exhaust emissions of a diesel direct injection engine using mixed palm oleinâ??soybean vegetable oil ethyl ester (POSEE) and methyl ester (POSME) have been examined. The results of experimental studies have shown that the torque and brake power output of an engine, which uses biodiesels, is slightly lower and specific fuel consumption is higher than in an engine using conventional diesel fuel. It has also been observed that there is a decrease in both carbon monoxide and hydrocarbon (HC) emissions, which indicates an advantage of exhaust emissions. Although methyl ester's CO2 emissions decreased compared with those of diesel fuel, NO and NOX emissions were higher with the biodiesels.

Imdat Taymaz; Mucahit Sengil

2010-01-01T23:59:59.000Z

403

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

SciTech Connect (OSTI)

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

404

Direct conversion of wet algae to crude biodiesel under supercritical ethanol conditions  

Science Journals Connector (OSTI)

Abstract This paper presents a single-step, environmentally friendly approach for the direct conversion of wet algae to crude biodiesel under supercritical ethanol conditions. Ethanol was used for the simultaneous extraction and transesterification of lipids in algae to produce fatty acid ethyl esters at supercritical conditions. In this work the effects of process parameters dry algae to ethanol (wt./vol.) ratio (1:6–1:15), reaction temperature (245–270 °C), and reaction time (2–30 min.) on the yield of fatty acid ethyl esters (FAEE) were studied. 67% conversion was achieved at 265 °C and 20 min of reaction time. The calorific value of a purified biodiesel sample produced at optimum conditions was measured to be 43 MJ/kg, which is higher than that of fatty acid methyl esters produced from the same biomass. The purified fatty acid ethyl esters were analyzed using GC–MS and FTIR. TGA analysis of algal biomass and purified FAEE was presented along with TEM images of the biomass captured before and after supercritical ethanol transesterification. This green conversion process has the potential to provide an energy-efficient and economical route for the production of renewable biodiesel production.

Harvind K. Reddy; Tapaswy Muppaneni; Prafulla D. Patil; Sundaravadivelnathan Ponnusamy; Peter Cooke; Tanner Schaub; Shuguang Deng

2014-01-01T23:59:59.000Z

405

Synthesis and structural characterization of new dithiocarbamate complexes from Sb(III) and Bi(III)  

SciTech Connect (OSTI)

Twenty new antimony and bismuth dithiocarbamate complexes which employed ten different type of amines have been successfully synthesized. The synthesized complexes with metal to dithiocarbamate ratio at 1:3. Elemental analysis of the complexes gave the general formula of MCl[S{sub 2}CNR’R”]{sub 2} where M = Sb(III), Bi(III); R’ = methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, benzyl; R” = ethanol, methyl, ethyl, propyl, isopropyl, cyclohexyl, benzyl. The complexes were analysed by IR and NMR spectroscopy. The crystal structure of five-coordinated antimony (III) complex have been determined by X-ray single crystal diffraction. Single crystal X-ray diffraction studies on SbCl[S{sub 2}CN(C{sub 4}H{sub 9})(C{sub 2}H{sub 5})]{sub 2} adopted a triclinic system with a space group P1 with a = 10.0141(8) Ĺ, b = 10.1394(7) Ĺ, c = 11.8665(9) Ĺ, ? = 67.960°, ? =87.616°, ? = 80.172°.

Jamaluddin, Nur Amirah; Baba, Ibrahim [School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

2013-11-27T23:59:59.000Z

406

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

407

Pilot-Scale Production of Fatty Acid Ethyl Esters by an Engineered Escherichia coli Strain Harboring the p(Microdiesel) Plasmid  

Science Journals Connector (OSTI)

...Bey, Alexandria, Egypt. Alexander Steinbuchel...produce FAEEs by its natural metabolism, and it...because of its low price; glycerol of sufficient...analyzed by TLC, gas chromatography (GC...cells, as analyzed by gas chromatography (data...shown). Analyses by gas chromatography (GC...

Yasser Elbahloul; Alexander Steinbüchel

2010-05-07T23:59:59.000Z

408

Pilot-Scale Production of Fatty Acid Ethyl Esters by an Engineered Escherichia coli Strain Harboring the p(Microdiesel) Plasmid  

Science Journals Connector (OSTI)

...and is even available from renewable sources as a byproduct of microbial...and could contribute to the energy market as a substitute for...engineered E. coli strain on renewable substrates such as hemicelluloses...56-81-5 Glycerol | Bioelectric Energy Sources Biomass Biotechnology...

Yasser Elbahloul; Alexander Steinbüchel

2010-05-07T23:59:59.000Z

409

Simultaneous Speciation of Butyl-, Phenyl-, and Cyclohexyltin Compounds in Aqueous Matrices Using Ethylation Followed by Solid-Phase Trace Enrichment, SFE, and GC Determination  

Science Journals Connector (OSTI)

......TCyT), and their degradation products (1,2...the extraction cell had an internal volume...respectively. Flows of fuel gases were 120 mL...into the extraction cell, which contained...butyltin and its degradation products from seawater......

Yong Cai; Josep M. Bayona

1995-03-01T23:59:59.000Z

410

(+)-2-(1-Hydroxyl-4-Oxocyclohexyl) Ethyl Caffeate Suppresses Solar UV-Induced Skin Carcinogenesis by Targeting PI3K, ERK1/2, and p38  

Science Journals Connector (OSTI)

...University of Science Technology, Shanghai...activated by solar ultraviolet...of JB6 Cl41 cells without toxicity...mouse epidermal cells. The inhibition...vivo model of solar UV-induced...purchased from Cell Signaling Technology. The antibody...

Do Young Lim; Mee-Hyun Lee; Seung Ho Shin; Hanyoung Chen; Joohyun Ryu; Lei Shan; Honglin Li; Ann M. Bode; Wei-Dong Zhang; and Zigang Dong

2014-08-01T23:59:59.000Z

411

Investigation of Pulsed Electric Field (PEF) as an Intensification Pretreatment for Solvent Lipid Extraction from Microalgae, utilizing Ethyl Acetate as a Greener Substitute to Chloroform-based Extraction  

E-Print Network [OSTI]

. Moreover, the novel utilization of Pulsed Electric Field (PEF) as a membrane permeating technique for intensification of the lipid extraction is analyzed. When compared to inherently toxic chloroform-based solvent (Bligh & Dyer method), this work...

Antezana Zbinden, Mauricio Daniel R.

2011-02-16T23:59:59.000Z

412

Metabolic Engineering of the Regulators in Nitrogen Catabolite Repression To Reduce the Production of Ethyl Carbamate in a Model Rice Wine System  

Science Journals Connector (OSTI)

...03602531003611915 . 7. Cadranel, JF , C Legendre, B Desaint, N Delamarre, C Florent and VG Levy. 1993. Liver disease from surreptitious administration of urethane. J. Clin. Gastroenterol. 17 :52-56. doi: 10.1097/00004836-199307000-00015...

Xinrui Zhao; Huijun Zou; Jianwei Fu; Jingwen Zhou; Guocheng Du; Jian Chen

2013-11-01T23:59:59.000Z

413

Experimental investigations of the performance, emission and combustion characteristics of a biodiesel (ethyl ester of fish oil) fuelled direct-injection diesel engine  

Science Journals Connector (OSTI)

The thirst for fuel is steadily increasing as technology continues to open new areas of exploration. At the same time, the indiscriminate extraction of fossil fuels may also result in pollutant emissions which cause major impacts on ecological systems. In order to overcome the above problems, a suitable biodiesel should be used to replace the diesel fuel. Hence, in this work, feasibility of using biodiesel prepared from fish oil was investigated. Experimental tests were carried out to evaluate the performance, emission and combustion characteristics of a single cylinder, constant speed engine using several blends under variable load conditions. It was found that NOx, HC and CO emission was reduced for blends along with a marginal increase of brake thermal efficiency and smoke. The ignition delay and maximum heat release rate were reduced compared to diesel. Ultimately, fish oil can indeed become the appropriate source for biodiesel with environmental benefits.

G. Sakthivel; G. Nagarajan; M. Ilangkumaran

2013-01-01T23:59:59.000Z

414

Influence of Neighboring Base Sequence on the Distribution and Repair of N-Ethyl-N-nitrosourea-induced Lesions in Escherichia coli  

Science Journals Connector (OSTI)

...total mutation. REFERENCES 1. Burns. P. A.. Gordon, A. J...194: 385-390, 1987. 2. Burns, P. A.. Allen, F. F...Smith, A. J. H., and Roe, B. A. Cloning in single-stranded...10. Gordon, A. J. E., Burns. P. A.. Fix, D. F...

Philip A. Burns; Alasdair J. E. Gordon; Kathy Kunsmann; and Barry W. Glickman

1988-08-15T23:59:59.000Z

415

Experimental Investigations of an IC Engine Operating with Alkyl Esters of Jatropha, Karanja and Castor Seed Oil  

Science Journals Connector (OSTI)

Abstract Diesel engines are efficient systems popularly used to meet electricity and other power requirements for agriculture, industry, transportation and decentralized power generation. Vegetable oils can be successfully used in Compression Ignition (CI) engine either through engine modifications or fuel modifications, later being more feasible option. Fuel modification options include blending of vegetable oils with mineral diesel, transesterification, cracking/pyrolysis, micro-emulsion, and hydrogenation to reduce polymerization and viscosity, transesterification of vegetable oil with a short chain alcohol i.e. methanol or ethanol being most popular. Several non-edible plant oils have been found to be promising crude oils for the production of biodiesel. Methanol is most commonly used in commercial production of biodiesel. Fatty acid alkyl esters (FAAE) produced from higher alcohols is of interest as they may have different fuel properties in comparison to methyl or ethyl esters. In the present investigations, preparation of methanol, ethanol, propanol and butanol were used for formation of alkyl esters of Jatropha, Karanja and Castor. The composition of Jatropha, Karanja and Castor oil were analysed and alcoholysis process for preparing alkyl esters of Jatropha, Karanja and Castor oil with various alcohols was optimised. Alkyl ester-diesel blends were used to test the diesel engine at different load conditions and extensive performance and emissions studies were conducted in single cylinder direct injection compression ignition engines. It is concluded that lower blends of ethyl, propyl and butyl esters of Jatropha and Karanja feedstock have physico-chemical properties similar to methyl esters. However, deviation from the properties became larger for higher blending ratio. Therefore, in order to get engine performance in close range of diesel, the optimum blending ratio of higher alkyl esters need to be even less than methyl esters. Lower blends of higher alkyl esters are expected to give engine characteristics in close proximity to diesel overcoming the limitations of bio-diesel, while retaining the advantages.

Sanjay Bajpai; Lalit Mohan Das

2014-01-01T23:59:59.000Z

416

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

417

DEPARTMENTS:  

Science Journals Connector (OSTI)

......Ethane Ethyl Acetylene Ethyl Chloride Ethyl Fluoride Ethylene Ethylene Oxide Fluorine Halocarbon- 11, 12, 13, 13B1, 14...compounds, the molecular weight, the catalog number and price. Listed for most items are the struc- tural formula......

New Products

1969-09-01T23:59:59.000Z

418

Table Definitions, Sources, and Explanatory Notes  

Gasoline and Diesel Fuel Update (EIA)

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

419

Polyfluoroalkyl chemicals in house dust  

SciTech Connect (OSTI)

We developed a high throughput analytical method using on-line solid phase extraction coupled with isotope dilution high-performance liquid chromatography-tandem mass spectrometry (on-line SPE-HPLC-MS/MS) to simultaneously determine the concentrations of 17 polyfluoroalkyl chemicals (PFCs) in house dust. The sample preparation includes dispersion of the dust samples in 0.1 M formic acid:MeOH (1:1), followed by agitation and filtration, addition of the isotope-labeled internal standard solution to the filtrate, and analysis by on-line SPE-HPLC-MS/MS. The limits of quantitation were <4.0 ng/g. The method accuracies ranged between 73.2% and 100.2% for the different analytes at two spike levels. We confirmed the validity of the method by analyzing 39 household dust samples collected in 2004. Of the 17 PFCs measured, 6 of them-perfluorobutane sulfonate (PFBuS), N-ethyl-perfluorooctane sulfonamide, 2-(N-ethyl-perfluorooctane sulfonamido) acetic acid (Et-PFOSA-AcOH), 2-(N-methyl-perfluorooctane sulfonamido) ethanol (Me-PFOSA-EtOH), perfluorohexane sulfonate (PFHxS), and perfluorooctane sulfonate (PFOS)-had detection frequencies >70%. We detected PFOS, PFBuS, and PFHxS at the highest median concentration, followed by Et-PFOSA-AcOH and Me-PFOSA-EtOH.

Kato, Kayoko [Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy., Mailstop F53, Atlanta, GA 30341 (United States)] [Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy., Mailstop F53, Atlanta, GA 30341 (United States); Calafat, Antonia M., E-mail: acalafat@cdc.gov [Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy., Mailstop F53, Atlanta, GA 30341 (United States); Needham, Larry L. [Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy., Mailstop F53, Atlanta, GA 30341 (United States)] [Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy., Mailstop F53, Atlanta, GA 30341 (United States)

2009-07-15T23:59:59.000Z

420

Thermodynamics of Hydrogen Production from Dimethyl Ether Steam Reforming and Hydrolysis  

SciTech Connect (OSTI)

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

T.A. Semelsberger

2004-10-01T23:59:59.000Z

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

Impact of energy-related pollutants on chromosome structure. Progress report, January 1-December 31, 1980. IQUID COLUMN CHROMATOGRAPHY; ABSORPTION SPECTRA; COMPUTER CODES; DICHROISM; EQUIPMENT INTERFACES; MICROPROCESSORS; SPECTROPHOTOMETERS; ; CARBON 13; COMPLEXES; NUCLEAR MAGNETIC RESONANCE  

SciTech Connect (OSTI)

Methods for rapidly analyzing methylated and ethylated nucleosides and bases by high pressure liquid chromatography were investigated. Deoxyribonucleotides were alkylated with alkyl iodides and dialkyl sulfates. Several unreported products of the reactions of methyl and ethyl iodide in dimethylsulfoxide were found and are being characterized. The Cary 219 UV-Vis spectrophotometer was interfaced to a microcomputer and several utility programs were written. Preliminary absorption and circular dichroism studies of the binding of ethidium to DNA and nucleosome cores showed binding to cores to be quite different from binding to DNA. Free radical and additional reactions of bisulfite with DNA in chromatin were examined. Free radical attack was minimal. Some conversion of cytosine to uracil was noted, but protein crosslinking to DNA was not detected. The first valid natural abundance /sup 13/C nmr spectra of double-stranded DNA and double-stranded DNA complexed with ethidium were obtained. These spectra suggested that DNA undergoes considerable internal motion. The data show that 13-C nmr studies of the conformational and motional properties of native DNA and of complexes of native DNA with small molecules are practical and promising. Studies of subnucleosomes derived from nucleosomes were completed. Based on these studies, a model of the linear arrangement of histone C-terminal and N-terminal chain regions along nucleosome DNA was proposed. The use of staphylococcal protease to probe histone conformations in nucleosomes was explored. Preliminary data indicate that H3 is much more susceptible to protease than other core histones, and is cleaved in its hydrophobic domain. A procedure for fractionating chromatin was alos developed. (ERB)

Not Available

1980-01-01T23:59:59.000Z

422

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

423

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

424

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

425

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

426

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

427

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

428

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

429

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.

430

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

431

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

432

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.

433

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

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

434

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

435

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

436

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

SciTech Connect (OSTI)

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

437

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

438

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

439

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

440

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

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

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

442

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

443

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

SciTech Connect (OSTI)

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

444

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

445

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

446

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

447

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

448

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

449

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

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

450

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

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

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

451

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

SciTech Connect (OSTI)

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

452

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

453

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

454

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

455

E-Print Network 3.0 - agent tm208 4-methyl-piperazine-1-carbodithioc...  

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

456

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

457

E-Print Network 3.0 - atropine methyl bromide Sample Search Results  

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

environmental significance. For example, the ability to consume ... Source: Goodwin, Kelly D. - Ocean Chemistry Division, Atlantic Oceanographic and Meteorological Laboratory....

458

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

459

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

460

Methanol and methyl fuel catalysts. Final technical report, September 1978-August 1980  

SciTech Connect (OSTI)

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

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

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

462

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

463

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

464

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

465

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

466

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

467

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

468

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

469

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

470

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

471

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

472

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

473

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

474

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

475

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

476

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

477

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.

478

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

479

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

480

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.

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

E-Print Network 3.0 - abscisic acid methyl Sample Search Results  

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

tuberosum, abscisic acid, after- ripening, dormancy, fluridone, germination, gibberellin, hydrothermal time... in freshly harvested TPS (Spicer and Dionne, 1961; Bamberg and...

482

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

483

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

484

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

485

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

486

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

487

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

488

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

489

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

490

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

491

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

492

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

493

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

494

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

495

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

496

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

497

Temperature dependence of the vapour tension of methyl-substituted phenol derivatives  

SciTech Connect (OSTI)

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

498

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.

499

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

500

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