Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 167 for “"xylose"”.
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Improved xylose fermentation by expression of a putative xylose transporter encoding gene HXT2.4 in Saccharomyces cerevisiae
… Unfortunately S. cerevisiae cannot consume xylose, a pentose sugar which comprises almost 30% of lignocellulosic biomass. Metabolic and genetic engineering methods were used to develop S. cerevisiae that could consume xylose. However in S. cerevisiae, pentose sugars can only enter the cell …
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Overproduction of xylose isomerase in recombinant Escherichia coli
… coli. Five strains transformed with the xylose isomerase overproduction system (pRK248/pTXI-1) were compared, based on parameters of cell metabolism and inducible enzyme activity in shake flask cultures. E. coli strain LE392 (pRK248/pTXI-l) performed the best with respect to nearly all of …
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Metabolic engineering of yeast for xylose uptake and fermentation
Xylose is the major pentose and the second most abundant sugar in lignocellulosic feedstocks. Therefore, the efficient utilization of xylose is required for the cost-effective bioconversion of lignocellulose. Rational and combinatorial metabolic engineering approaches coupled with transcriptomic …
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Xylitol Production From D-Xylose by Facultative Anaerobic Bacteria
… 10 of the 17 species screened could grow on D-xylose and produce detectable quantities of xylitol during 24-96 h of fermentation. The ten bacterial species were studied for the effect of environmental factors, such as temperature, concentration of D-xylose, and aeration, on xylitol production. …
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Metabolic engineering of xylose-fermenting saccharomyces cerevisiae for bioisoprene production
… production. Utilizing lignocellulosic sugar, xylose, is a nascent approach for bioproduction of commodity chemicals. Since xylose, the second most abundant sugar after glucose, can be assimilated by microorganism as a cheap carbon source to make ethanol and other chemicals, bioisoprene …
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Control of glucose and xylose utilization by Clostridium thermohydrosulfuricum Rt8.B1
… of this study demonstrated that glucose and xylose were used simultaneously i.e. the bacterium exhibited hyperbolic growth when both glucose and xylose were supplied together at nonlimiting concentrations. Under conditions of hyperbolic growth, Cl. thermohydrosulfuricum Rt8.B1 exhibited …
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Bioconversion of xylose into high-value products by engineered saccharomyces cerevisiae
The student, Stephan Lane, accepted the attached license on 2019-04-16 at 21:01.
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Design of a Saccharomyces cerevisiae strain capable of simultaneously utilizing cellobiose and xylose
… glucose in lignocellulosic hydrolysates inhibits xylose and other sugars’ utilization. As a result, it is attractive to construct a glucose derepressed S. cerevisiae strain for efficient utilization of lignocellulosic sugars. In this thesis, we proposed and constructed an artificial cellobiose …
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Optimizing xylitol production: a molecular and experimental study of xylose reductase in Candida tropicalis
… the ability of Candida tropicalis to convert D-xylose into xylitol through the enzyme xylose reductase, with a focus on optimizing pH conditions to enhance conversion efficiency. To achieve this, both experimental fermentation and computational molecular dynamics simulations using GROMACS and …
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Engineering robust yeast strains for the conversion of xylose derived from lignocellulosic biomass to xylitol
… genes encoding a β-xylosidase, β-xylanase and xylose reductase (XR), was evaluated. The effect of over-expressed heterologous protein production on strain robustness and metabolism was also assayed. Our results revealed that the overexpressed XR failed to improve on the xylose reduction ability …
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Lactic acid fermentation of xylose by Escherichia coli: carbon tracer studies on the C₂ + C₁ condensation reaction
… a washed bacterial cell suspension utilizing xylose as a sole substrate. Previous investigators have obtained evidence that one of the first reactions in the fermentation of pentoses was a carbon bond cleavage resulting in the production of a C₃ and a C₂ fragment. The importance of the C₂ …
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