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单宁对紫甘薯花色苷的辅色作用研究

DOI: 10.7685/j.issn.1000-2030.2006.03.020, PP. 98-102

Keywords: 紫甘薯,单宁,花色苷,辅色作用,动力学

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Abstract:

在不同温度和光照条件下研究了紫甘薯花色苷、紫甘薯花色苷单宁辅色动力学特性。结果表明,在缓冲液pH值为4.0条件下,添加0.1mo.lL-1单宁的紫甘薯花色苷热降解活化能为43.09kJ.mol-1,比紫甘薯花色苷高11.57%。与紫甘薯花色苷相比,同一温度下单宁紫甘薯花色苷热降解速率低,半衰期长,耐热性好。单宁紫甘薯花色苷光降解速率是紫甘薯花色苷的92.8%。表明单宁能增强花色苷对光、热的稳定性,对紫甘薯花色苷有辅色作用。

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