期刊
FOOD CHEMISTRY
卷 192, 期 -, 页码 43-52出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.06.107
关键词
Copper; Saccharomyces cerevisiae; Cell growth; Fermentation performance; Adsorption pathway
资金
- National Nature Science Foundation Project [31471835]
The effect of copper stress on the fermentation performance of Saccharomyces cerevisiae and its copper adsorption pathway during alcoholic fermentation were investigated in this study. At the limits imposed by the regulations of the European Union and South African (<= 20 mg/l), copper had no effect on the cell growth of S. cerevisiae, but its fermentation performance was inhibited to a certain extent. Therefore, the regulated limit should be further reduced (<= 12.8 mg/l). Under 9.6-19.2 mg/l copper stress, S. cerevisiae could absorb copper; the copper removal ratio and the unit strain adsorption were 60-81% and 2.72-9.65 mg/g, respectively. S. cerevisiae has a non-biological adsorption of copper, but compared with biological (living yeast) adsorption, the non-biological adsorption was very low. The copper adsorption way of S. cerevisiae was primarily via biological (living yeast) adsorption, which was a two-step process. (C) 2015 Elsevier Ltd. All rights reserved.
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