title: Effect of inoculum level of xylitol production from rice straw hemicellulose hydrolysate by Candida guilliermondii.
abstract: The effect of inoculum level on xylitol production by Candida guilliermondii was evaluated in a rice straw hemicellulose hydrolysate. High initial cell density did not show a positive effect in this bioconversion since increasing the initial cell density from 0.67 g L-1 to 2.41 g L-1 decreased both the rate of xylose utilization and xylitol accumulation. The maximum xylitol yield (0.71 g g-1) and volumetric productivity (0.56 g L-1 h-1) were reached with an inoculum level of 0.9 g L-1. These results show that under appropriate inoculum conditions rice straw hemicellulose hydrolysate can be converted into xylitol by the yeast C. guilliermondii with efficiency values as high as 77% of the theoretical maximum.
authors.affiliation: Department of Biotechnology, Faculty of Chemical Engineering of Lorena, SP, Brazil.
authors.forename: I C
authors.initials: IC
authors.lastname: Roberto
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: I M
authors.initials: IM
authors.lastname: de Mancilha
mesh_terms: D002175:Candida / Q000254:growth & development* / Q000378:metabolism*; D015169:Colony Count, Microbial; D003470:Culture Media / Q000378:metabolism*; D005285:Fermentation; D006868:Hydrolysis; D012275:Oryza / Q000378:metabolism*; D011134:Polysaccharides / Q000378:metabolism*; D014993:Xylitol / Q000096:biosynthesis*
chemical_list: D003470:Culture Media; D011134:Polysaccharides; C007916:hemicellulose; D014993:Xylitol