Results 161 to 170 of about 13,063 (197)
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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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PRODUCTION AND PROPERTIES OF 2,3-BUTANEDIOL XXXVI. LINEAR POLYESTERS OF 2,3-BUTANEDIOL
Canadian Journal of Research, 1950New polyesters with basic units containing 6, 7, 8, 9, 10, 13, and 14 chain atoms have been prepared from levo-2,3-butanediol and ethyl oxalate, ethyl malonate, dimethyl terephthalate, maleic anhydride, succinic, glutaric, adipic, azelaic, and sebacic acids, and from meso-2,3-butanediol and o-phthalic anhydride. Esterification of 2,3-butanediol with a
R. W. Watson +2 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, 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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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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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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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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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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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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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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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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