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Selection of Xilose-Fermenting Yeast Strains BABT
Silva,Rosimeire Oenning da; Cereda,Marney Pascoli; Gomes,Eleni; Martins,Gisele Marta; Pagnocca,Fernando Carlos; Silva,Roberto da.
ABSTRACT In Brazil, ethanol is obtained by fermentat of sugar cane juice using Saccharomyces cerevisiae. The cane juice extraction generates the bagasse that has been used for obtaining generation biofuel. However, the sugarcane bagasse has 30% pentose that cannot be fermented to ethanol by S. cerevisiae. Thus the aim of this study was to isolate a yeast able to ferment xylose to ethanol. Samples of cane juice and flowers were used for the isolation of 165 strains that were then screened for ethanol production using plate testing. Among them, the ethanol positive strains Wickerhamomyces anomalus, Schizosaccharomyces pombe and Starmerella meliponinorum were selected for a xylose fermentation assay, using a semi-synthetic and bagasse hydrolysate as must. S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xylose; Ethanol; Yeast; Sugarcane bagasse..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100419
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Alcoholic fermentation by the wild yeasts under thermal, osmotic and ethanol stress BABT
Silva,Rosimeire Oenning da; Batistote,Margareth; Cereda,Marney Pascoli.
This study aimed to explore the variability in the metabolism of nine wild yeasts isolated from the sugarcane juice from a distillery in the Brazilian State of Mato Grosso. Cell viability under the stress conditions was evaluated. The yeasts were inoculated in the test tubes containing sugarcane juice adjusted from 12 to 21º Brix, ethanol from 6 to 12% in volume and temperature at 30, 35 and 40ºC. The viability was established by the growth in Petri dishes and visually by the CO2 production in the test tubes. None of the evaluated yeasts showed simultaneous resistance to the three stress conditions. The potential of yeast BB.09 could be emphasized due to its ability to ferment up to12% ethanol at 30°C.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bio prospection; Alcohol distillery; Cellular viability; Fermentation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200001
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