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锌离子提高絮凝酵母乙酸胁迫耐受性

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Indexed by:期刊论文

Date of Publication:2012-06-15

Journal:化工学报

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:63

Issue:6

Page Number:1823-1829

ISSN No.:0438-1157

Key Words:自絮凝酵母;锌离子;乙酸胁迫;乙醇发酵

Abstract:研究了锌离子对絮凝酵母SPSC01乙酸胁迫条件下乙醇发酵的影响,结果表明,添加适当浓度的锌离子可以缓解乙酸对自絮凝酵母生长的抑制,进而缩短其发酵周期;其中添加0.03 g·L-1锌离子对乙酸胁迫下细胞活性的保护作用最明显,可使15 g·L-1乙酸存在时发酵周期缩短近30 h,最终生物量得率提高27.8%,乙醇产率提高66.7%.同时锌离子还可以使乙酸抑制条件下,发酵液中副产物乳酸和丙酸的含量降低.

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