Results 161 to 170 of about 117,488 (208)
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Canadian Journal of Research, 1947
levo-2,3-Butanediol will condense with ethyl acetoacetate in the presence of hydrochloric acid to give the ethyl ester of levo-2,4,5-trimethyl-2-carboxymethyl-1,3-dioxacyclopentane (I) (yield 48%) from which the free acid may be obtained. If p-toluenesulphonic acid is used as the catalyst and the condensation is carried out in boiling butanol with ...
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levo-2,3-Butanediol will condense with ethyl acetoacetate in the presence of hydrochloric acid to give the ethyl ester of levo-2,4,5-trimethyl-2-carboxymethyl-1,3-dioxacyclopentane (I) (yield 48%) from which the free acid may be obtained. If p-toluenesulphonic acid is used as the catalyst and the condensation is carried out in boiling butanol with ...
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Metabolism of 2,3‐butanediol in yeasts
Yeast, 1988AbstractThe biochemistry and physiology of 2,3‐butanediol metabolism has been studied in a number of selected yeast species. Candida utilis CBS 621 exhibited diauxic growth on 2,3‐butanediol. The first phase was characterized bu the utilization of the two optically active stereoisomers and associated accumulatoin. In the second phase of growth the meso‐
Cornelis Verduyn +3 more
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Canadian Journal of Research, 1947
Optically active 4,5-dimethyl-1,3-dioxacyclopentane derivatives can be easily obtained by condensing levo-2,3-butanediol with aldehydes or ketones in the presence of small amounts of strong acids at ordinary temperatures. Condensations were effected with formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, 2-ethylbutyraldehyde,
A G, NEISH, F J, MACDONALD
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Optically active 4,5-dimethyl-1,3-dioxacyclopentane derivatives can be easily obtained by condensing levo-2,3-butanediol with aldehydes or ketones in the presence of small amounts of strong acids at ordinary temperatures. Condensations were effected with formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, 2-ethylbutyraldehyde,
A G, NEISH, F J, MACDONALD
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Bioconversion of Pentoses to 2,3-Butanediol by Klebsiella pneumoniae
1983The facultative anaerobe Klebsiella pneumoniae converts a wide variety of sugars to 2,3-butanediol. The theoretical maximum yield of butanediol from sugar is 0.50 kg per kg. All of the sugars commonly found in hemicellulose and cellulose hydrolysates can be converted to butanediol, including glucose, xylose, arabinose, mannose, galactose, and ...
N B, Jansen, G T, Tsao
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The Microbial Production of 2,3-Butanediol
1987Publisher Summary This chapter provides a comprehensive survey of diol production, including biochemistry, microbiology, and process engineering. Two microbial species have demonstrated a potential for diol production on a commercial scale. Klebsiella pneumoniae, with broad substrate and environmental adaptability, is the most thoroughly investigated
Robert J. Magee, Naim Kosaric
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Adsorption of 2,3-butanediol on Si(1 0 0)
Surface Science, 2004The adsorption of 2,3-butanediol on a Si(1 0 0) surface has been investigated by photoelectron spectroscopy. The valence band spectra show features assigned to molecular orbitals of 2,3-butanediol by comparison with calculations, and the surface states of clean Si are removed. The Si 2p reveals core-level shifts with two new components at 0.24 andc0.97
JW Kim +7 more
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Combinatorial optimization of cyanobacterial 2,3-butanediol production
Metabolic Engineering, 2014A vital goal of renewable technology is the capture and re-energizing of exhausted CO₂ into usable carbon products. Cyanobacteria fix CO₂ more efficiently than plants, and can be engineered to produce carbon feedstocks useful for making plastics, solvents, and medicines.
John W.K. Oliver +3 more
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Canadian Journal of Research, 1949
The anaerobic dissimilation of glucose by Bacillus polymyxa, Bacillus subtilis (Ford's type), Aerobacter aerogenes, and Serratia marcescens was studied at poised hydrogen ion concentrations covering the range pH 5.0 to 8.0. Each fermentation was controlled within ±0.05 pH units by automatic addition of ammonium hydroxide solutions.
A. C. Neish, G. A. Ledingham
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The anaerobic dissimilation of glucose by Bacillus polymyxa, Bacillus subtilis (Ford's type), Aerobacter aerogenes, and Serratia marcescens was studied at poised hydrogen ion concentrations covering the range pH 5.0 to 8.0. Each fermentation was controlled within ±0.05 pH units by automatic addition of ammonium hydroxide solutions.
A. C. Neish, G. A. Ledingham
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2001
[513-85-9] C4H10O2 (MW 90.12) InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3 InChIKey = OWBTYPJTUOEWEK-UHFFFAOYSA-N (2R,3R) [24347-58-8] InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3/t3-,4-/m1/s1 InChIKey = OWBTYPJTUOEWEK-QWWZWVQMSA-N (2S,3S) [19132-06-0] InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3/t3-,4-/m0/s1 InChIKey ...
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[513-85-9] C4H10O2 (MW 90.12) InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3 InChIKey = OWBTYPJTUOEWEK-UHFFFAOYSA-N (2R,3R) [24347-58-8] InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3/t3-,4-/m1/s1 InChIKey = OWBTYPJTUOEWEK-QWWZWVQMSA-N (2S,3S) [19132-06-0] InChI = 1S/C4H10O2/c1-3(5)4(2)6/h3-6H,1-2H3/t3-,4-/m0/s1 InChIKey ...
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Screening of novel bacteria for the 2,3-butanediol production
Applied Microbiology and Biotechnology, 2016Biotechnologically produced 2,3-butanediol (2,3-BDO) is a potential starting material for industrial bulk chemicals such as butadiene or methyl ethyl ketone which are currently produced from fossil feedstocks. So far, the highest 2,3-BDO concentrations have been obtained with risk group 2 microorganisms. In this study, three risk group 1 microorganisms
Malee, Kallbach +3 more
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