Results 151 to 160 of about 117,488 (208)
Canadian Journal of Research, 1947 Pyrolysis of the vapour of the cyclic methyl ethyl ketal of l-2,3-butanediol gives butanone as the chief product. Catalysts such as alumina or phosphoric anhydride greatly accelerate this reaction, while catalytic nickel has little effect. It was found necessary to have alkyl or aryl radicals substituted on the 1,3-dioxa-cyclopentane ring to obtain a ...
A C, NEISH, V C, HASKELL, F J, MACDONALD
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Bacterial 2,3-butanediol dehydrogenases
Archives of Microbiology, 1978Enterobacter aerogenes, Aeromonas hydrophila, Serratia marcescens and Staphylococcus aureus possessing L(+)-butanediol dehydrogenase produced mainly meso-butanediol and small amounts of optically active butanediol; Acetobacter suboxydans, Bacillus polymyxa and Erwinia carotovora containing D(-)-butanediol dehydrogenase produced more optically active ...
H, Höhn-Bentz, F, Radler
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Stereoisomeric specificities of 2,3-butanediol dehydrogenases
Biochimica et Biophysica Acta, 1960Abstract 1. 1. Bacteria that produce 2,3-butanediol as an end product of the fermentation of sugars all form D (−)-acetylmethylcarbinol from pyruvate. 2. 2. 2,3-Butanediol dehydrogenases are stereoisomerically specific. Some dehydrogenases oxidize a hydroxyl group in the D (−) configuration [ D (−) dehydrogenase] while other dehydrigenases ...
M B, TAYLOR, E, JUNI
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Identification and measurement of 2,3‐butanediol in silage
Journal of the Science of Food and Agriculture, 1973Abstract2,3‐butanediol was identified in silage extracts using gas chromatography and mass spectrometry. It was present in stacks of untreated and formaldehyde‐treated silage in concentrations of 2.4% of the dry matter.
P F, Fennessy, T N, Barry
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On the role of 2,3-butanediol in the metabolism of ethanol
Medical Hypotheses, 1986A new mechanism is proposed for the enzymatic formation of 2,3-butanediol. It could be related to the elimination of ethanol and acetaldehyde in chronic alcoholic subjects.
F J, López-Soriano, J M, Argilés
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Applied Microbiology and Biotechnology, 2016
The stereochemistry of 2,3-butanediol (2,3-BD) synthesis in microbial fermentations is important for many applications. In this work, we showed that Corynebacterium glutamicum endowed with the Lactococcus lactis genes encoding α-acetolactate synthase and decarboxylase activities produced meso-2,3-BD as the major end product, meaning that (R)-acetoin is
Dušica Radoš +7 more
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The stereochemistry of 2,3-butanediol (2,3-BD) synthesis in microbial fermentations is important for many applications. In this work, we showed that Corynebacterium glutamicum endowed with the Lactococcus lactis genes encoding α-acetolactate synthase and decarboxylase activities produced meso-2,3-BD as the major end product, meaning that (R)-acetoin is
Dušica Radoš +7 more
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Microbial Production of 2,3-Butanediol
2011Microbial production of 2,3-butanediol (2,3-BDL) was once conducted commercially in Europe until it could be made more cheaply from fossil oil sources. Interest in its biotechnological production resurfaced recently due to its diverse potential practical uses and the ever-decreasing availabilities of petroleum oil.
Sabra, Wael +4 more
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Separation of Racemic frommeso-2,3-Butanediol
Cryobiology, 19992,3-Butanediol containing less than 3% of the meso form has been obtained from samples containing up to 50% of the meso form. The diacetate was obtained by esterification with acetic anhydride in the presence of traces of sulfuric acid as a catalyst and was then purified.
Utille, J.P., Boutron, P.
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Biological production of 2,3-butanediol
Applied Microbiology and Biotechnology, 20012,3-Butanediol (2,3-BDL), which is very important for a variety of chemical feedstocks and liquid fuels, can be derived from the bioconversion of natural resources. One of its well known applications is the formation of methyl ethyl ketone, by dehydration, which can be used as a liquid fuel additive. This article briefly reviews the basic properties of
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UTILIZATION OF 2,3-BUTANEDIOL BY SHEEP
Canadian Journal of Animal Science, 19812,3-butanediol was measured at concentrations of up to 1.8% of the dry matter in barley silage and in lesser amounts in alfalfa-grass silage. In exp. 1, from 1.2 to 2.5% of the 2,3-butanediol in barley silage consumed by sheep was excreted in the urine. In exp. 2, 2,3-butanediol was fed to 16 sheep at concentrations of 0, 1, 3 or 5% of the diet for 20
G. W. MATHISON +2 more
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