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学科主题: 物理化学
题名: Vitalized yeast with high ethanol productivity
作者: Liu, Xiumei1;  Xu, Wenjuan1;  Zhang, Chao1;  Yan, Peifang1;  Jia, Songyan1;  Xu, Zhanwei1;  Zhang, Z. Conrad1
通讯作者: 张宗超
刊名: RSC ADVANCES
发表日期: 2014
DOI: 10.1039/c4ra08809c
卷: 4, 期:94, 页:52299-52306
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Fuel ethanol is an attractive alternative to fossil-based fuels or fuel additives. Very-high-gravity (VHG) ethanol fermentation is a promising technology to reduce energy consumption in distillation. However, yeast cells subjected to a high concentration of ethanol and osmotic stress readily lose cell viability, resulting in reduced ethanol productivity. Here we report the beneficial effect of fully water-soluble polyethylene glycol (PEG) in chemically exo-protecting yeast cells during fermentation, resulting in largely boosted cell vitality and tolerance to high ethanol concentration. The final ethanol concentration and the yeast cell viability were substantially increased as compared to PEG-free fermentation. The recovered exo-protected yeast was further demonstrated to continue to deliver superior bio-catalytic performance in subsequent fermentations over that recovered from PEG-free broth. Furthermore, the water-soluble PEG was readily recycled for reuse after distillation of ethanol.
关键词[WOS]: SACCHAROMYCES-CEREVISIAE ;  FERMENTATION PROCESSES ;  ALCOHOL PRODUCTION ;  FUEL ALCOHOL ;  WHEAT MASHES ;  SUPPLEMENTATION ;  GLUCOSE ;  SUGAR
语种: 英语
WOS记录号: WOS:000344389000064
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144072
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian, Peoples R China

Recommended Citation:
Liu, Xiumei,Xu, Wenjuan,Zhang, Chao,et al. Vitalized yeast with high ethanol productivity[J]. RSC ADVANCES,2014,4(94):52299-52306.
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