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Evaluation of oat hull hemicellulosic hydrolysate fermentability employing Pichia stipitis BABT
Chaud,Luciana Cristina Silveira; Silva,Débora Danielle Virgínio da; Mattos,Rafael Taino de; Felipe,Maria das Graças de Almeida.
Oat hull hemicellulosic hydrolysate obtained by diluted acid hydrolysis was employed as fermentation medium for Pichia stipitis cultivation. A comparison between the use of treated hydrolysate with 1% activated charcoal to reduce the toxic compounds generated during the hydrolysis process and untreated hydrolysate as a control was conducted. In the cultures using treated hydrolysate the total consumption of glucose, low xylose consumption and ethanol and glycerol formation were observed. The medium formulated with untreated hydrolysate showed morphological cell modifications with consequently cell death, no ethanol formation and formation of glycerol as byproduct of fermentative process, probably as a response to stressful conditions to yeast due to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pichia stipitis; Hemicellulosic hydrolysate; Oat hull; Ethanol; Activated charcoal.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500017
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