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- W287565925 abstract "Lignocellulosic raw materials for bioethanol production are today the basis for many ethanol production sites around the world. However, the utilization of engineered yeast strains for second generation ethanol production at large-scale can still be improved. Yeasts mainly use the sugars present in the lignocellulosic biomass but, toxic compounds derived from cellulose, hemicellulose and lignin degradation during pretreatment are also found in the media and inhibit yeast growth. Furthermore, wild type Saccharomyces cerevisiae is not able to ferment xylose which could constitute up to 40% of the lignocellulose material. Hence the recombinant yeast strains must be robust and ferment xylose to ethanol with high yields in the presence of inhibitors.In this study, different evolved xylose fermenting Saccharomyces cerevisiae strains have been compared in ethanol production processes from lignocellulosic hydrolysates. The differences between using single cell transformants and mixed populations will be evaluated in terms of ethanol production in large scale bioreactors.Furthermore, we have established a method to barcode the evolved yeast strains in order to be able to verify their origin. It is of outmost importance that after barcoding the original characteristics of a yeast strain are maintained. Those requirements can only be fulfilled by using a dominant selection principle. We have obtained a few hundred transformants that were shown to contain the new unique barcode DNA sequence via DNA isolation and DNA sequencing. The transformed strains must be able to grow on the lignocellulosic material and consume xylose at the same rate as before the transformation which also was tested in this study." @default.
- W287565925 created "2016-06-24" @default.
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- W287565925 date "2012-01-01" @default.
- W287565925 modified "2023-09-26" @default.
- W287565925 title "EVALUATION OF EVOLVED AND BARCODED XYLOSE FERMENTING STRAINS FOR BIOETHANOL PRODUCTION FROM LIGNOCELLULOSE" @default.
- W287565925 hasPublicationYear "2012" @default.
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