Direct Fermentation of d -Xylose to Ethanol by Kluyveromyces marxianus Strains
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چکیده
منابع مشابه
D-Xylose transport by Candida succiphila and Kluyveromyces marxianus.
The kinetics and regulation of D-xylose uptake were investigated in the efficient pentose fermentor Candida succiphila, and in Kluyveromyces marxianus, which assimilate but do not ferment pentose sugars. Active high affinity (Km approximately 3.8 mM; Vmax approximately 15 nmol/[mg min]) and putative facilitated diffusion low-affinity (Km approximately 140 mM; Vmax approximately 130 nmol/[mg min...
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In the absence of oxygen Bacillus macerans is able to ferment xylose. The principal products are ethanol, formate, C02, acetone and H2. The yield of ethanol was 61% based on the theoretical value of 0.51 g per g xylose consumed. The cells could grow in the presence of up to 4% (v/v) of added ethanol but the growth rate was already reduced to about 50% by 1% (v/v) of alcohol. Glucose and the pen...
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Eleven strains of an undescribed species of Clavispora fermented D-xylose directly to ethanol under aerobic conditions. Strain UWO(PS)83-877-1 was grown in a medium containing 2% D-xylose and 0.5% yeast extract, and the following results were obtained: ethanol yield coefficient (ethanol/D-xylose), 0.29 g g (57.4% of theoretical); cell yield coefficient (dry biomass/D-xylose), 0.25 g g; maximum ...
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BACKGROUND The yeast Kluyveromyces marxianus features specific traits that render it attractive for industrial applications. These include production of ethanol which, together with thermotolerance and the ability to grow with a high specific growth rate on a wide range of substrates, could make it an alternative to Saccharomyces cerevisiae as an ethanol producer. However, its ability to co-fer...
متن کاملIsolation of Xylose Fermentation Strains for Ethanol Production and Xylose Fermentation Research
As a clean and renewable source of energy, ethanol is a promising alternative to fossil fuels.1 Especially lignocelluloses, as raw material for ethanol production, have gained great interest during these years.2 Production of bio-ethanol will help to cope with the over-consumption of fossil fuels and further work for the reduction of carbon dioxide emissions. Lignocelluloses (crop residue, cell...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1982
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.44.5.1039-1041.1982