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首页> 外文期刊>Journal of the Institute of Brewing >Sucrose Fermentation by Brazilian Ethanol Production Yeasts in Media Containing Structurally Complex Nitrogen Sources
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Sucrose Fermentation by Brazilian Ethanol Production Yeasts in Media Containing Structurally Complex Nitrogen Sources

机译：巴西乙醇生产酵母在含有结构复杂氮源的培养基中进行蔗糖发酵

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摘要

Four Saccharomyces cerevisiae Brazilian industrial ethanol production strains were grown, under shaken and static conditions, in media containing 22% (w/v) sucrose supplemented with nitrogen sources varying from a single ammonium salt (ammonium sulfate) to free amino acids (casamino acids) and peptides (peptone). Sucrose fermentations by Brazilian industrial ethanol production yeasts strains were strongly affected by both the structural complexity of the nitrogen source and the availability of oxygen. Data suggest that yeast strains vary in their response to the nitrogen source's complex structure and to oxygen availability. In addition, the amount of trehalose produced could be correlated with the fermentation performance of the different yeasts, suggesting that efficient fuel ethanol production depends on finding conditions which are appropriate for a particular strain, considering demand and dependence on available nitrogen sources in the fermentation medium.
机译：在摇动和静态条件下，在含有22％（w / v）蔗糖并补充了氮源（从单个铵盐（硫酸铵）到游离氨基酸（酪蛋白氨基酸）不等）的培养基中培养了四种酿酒酵母巴西工业乙醇生产菌株。和肽（蛋白p）。巴西工业乙醇生产酵母菌株的蔗糖发酵受到氮源结构复杂性和氧气可用性的强烈影响。数据表明，酵母菌株对氮源的复杂结构和对氧的利用率的反应各不相同。此外，海藻糖的产生量可能与不同酵母的发酵性能相关，这表明有效的燃料乙醇生产取决于寻找适合特定菌株的条件，同时考虑到发酵培养基中需求和对可用氮源的依赖。 。

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