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~(60)Co-γ射线辐照对孜然粉中的微生物和抗氧化活性的影响 

Food and Fermentation Industries(2009)

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Abstract
研究了60Co-γ射线辐照对孜然粉的杀菌效果和抗氧化性的影响。实验结果表明:孜然粉大肠菌群污染严重,达2.1×107MPN/100g。细菌总数、大肠菌群、微球菌、乳酸菌、酵母、霉菌和芽孢菌的数量随辐照剂量的增加显著减少。大肠菌群D10值1.31kGy,为辐射敏感菌,是辐照剂量设定的指示菌。辐照后检测总多酚、单宁含量,总多酚含量随辐照剂量增加呈先减少后增加的趋势,而单宁含量显著减少。推荐剂量范围内对孜然多酚含量影响不大,对精油抗氧化影响不显著,但显著提高了乙醇粗提液的DPPH.清除率。因此,60Co-γ射线辐照杀菌是香辛料等含抗氧化成分物料的理想杀菌方式。
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Key words
antioxidant activity,gamma irradiation,spices
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