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首页> 外文期刊>Journal of the Institute of Brewing >Evaluation of Brazilian ethanol production yeasts for maltose fermentation in media containing structurally complex nitrogen sources
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Evaluation of Brazilian ethanol production yeasts for maltose fermentation in media containing structurally complex nitrogen sources

机译：评估巴西乙醇生产酵母在含结构复杂氮源的培养基中进行麦芽糖发酵的能力

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摘要

Maltose and glucose fermentations are strongly affected by the structural complexity of the nitrogen source and by the presence of oxygen. In this study five industrial Saccharomyces cerevisiae strains were grown in synthetic medium, containing maltose or glucose, supplemented with different nitrogen sources, with or without agitation. All strains were able to grow and efficiently ferment glucose, but not all strains were able to grow and ferment maltose well. Peptone and ammonium sulfate induced improved fermentation for all strains and conditions. Under agitation, as expected, higher biomass accumulation was detected. Casamino acids supplementation induced efficient maltose fermentation for all of the strains under aerated conditions, but differing maltose utilization patterns were observed for the static cultures.
机译：麦芽糖和葡萄糖的发酵受到氮源结构的复杂性和氧气的存在的强烈影响。在这项研究中，在合成培养基中培养了五种工业酿酒酵母菌株，这些菌株含有麦芽糖或葡萄糖，并辅以不同的氮源，有或没有搅拌。所有菌株都能生长并有效地发酵葡萄糖，但并非所有菌株都能生长并良好地发酵麦芽糖。蛋白ept和硫酸铵诱导了所有菌株和条件下发酵的改善。如预期的那样，在搅拌下，检测到更高的生物量积累。酪蛋白氨基酸的添加在充气条件下诱导了所有菌株的有效麦芽糖发酵，但是在静态培养物中观察到了不同的麦芽糖利用模式。

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