Utilization by yeasts

An observation of Nielsen, Shull and Peterson may be connected with the process of reduction. These authors demonstrated that a substance obtained by mild oxidation of biotin with H2O2, in a lower state of oxidation than the sulfone of Hofmann, Melville and du Vigneaud, can be utilized by yeast. 

Although other researchers have reported the use of detoxification steps for other hydrolysates to be utilized by yeast (5,7,38,41), considering the low level of inhibitors present in the BSG OCL acid posthydrolysate, no special detoxification treatment was carried out, except adjustment of the hydrolysate pH to 5.5. For pH adjustment of the hydrolysate, several alkalis were tested, namely NaOH, CaO and Ca(OH)2. CaO, induced high foam... 

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