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| Silva,Débora Danielle Virgínio da; Mancilha,Ismael Maciel de; Silva,Silvio Silvério da; Felipe,Maria das Graças de Almeida. |
| The effect of glucose on xylose-to-xylitol bioconversion by Candida guilliermondii was examined by adding it to sugarcane bagasse hydrolysate medium to obtain different glucose:xylose ratios (1:25, 1:12, 1:5 and 1:2.5). Under experimental conditions, increasing glucose:xylose ratio improved the assimilation of the xylose present in the hydrolysate by yeast, resulting in biomass increase, and in the formation of xylitol and glycerol/ethanol by-products. Maximum values of xylitol yield (0.59 g g-1) and volumetric productivity (0.53 g l-1.h-1) were obtained with glucose:xylose ratio of 1:5, resulting in the higher conversion efficiency (64.3%). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Candida guilliermondii; Glucose; Sugarcane bagasse hydrolysate; Xylitol; Xylose. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200005 |
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| Chamnipa,Nuttaporn; Thanonkeo,Sudarat; Klanrit,Preekamol; Thanonkeo,Pornthap. |
| Abstract High potential, thermotolerant, ethanol-producing yeasts were successfully isolated in this study. Based on molecular identification and phylogenetic analysis, the isolated thermotolerant yeasts were clustered in the genera of Pichia kudriavzevii, Candida tropicalis, Candida orthopsilosis, Candida glabrata and Kodamea ohmeri. A comparative study of ethanol production using 160 g/L glucose as a substrate revealed several yeast strains that could produce high ethanol concentrations at high temperatures. When sugarcane bagasse (SCB) hydrolysate containing 85 g/L glucose was used as a substrate, the yeast strain designated P. kudriavzevii RZ8-1 exhibited the highest ethanol concentrations of 35.51 g/L and 33.84 g/L at 37 °C and 40 °C, respectively. It... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pichia kudriavzevii; Thermotolerant yeast; Ethanol production; Gene expression; Sugarcane bagasse hydrolysate. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200378 |
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| Silva,Débora D.V.; Felipe,Maria G.A.; Mancilha,Ismael M.; Luchese,Rosa H.; Silva,Sílvio S.. |
| Sugarcane bagasse hydrolysate (initial acetic acid concentration = 3.5g/L), was used as a fermentation medium for conversion of xylose into xylitol by the yeast Candida guilliermondii FTI 20037. Acetic acid (2.0g/L) was added to the medium at different times of fermentation, with the aim of evaluating its effects on the bioconversion process. The addition of acetic acid to the medium after 12h of fermentation resulted in the strongest inhibition of the yeast metabolism. In this case, the xylose consumption and cell growth were, respectively, 23.22 and 11.24% lower than when acid was added to the medium at the beginning of fermentation. As a consequence of the inhibitory effect, lower values of the xylitol yield (0.39g/g) and productivity (0.22g/L.h) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Xylitol; Xylose; Acetic acid; Sugarcane bagasse hydrolysate. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200014 |
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