Distribution of phenolic compounds and antioxidative activities in parts of sweet potato (Ipomoea batata L.) plants and in home processed roots
Distribution of phenolic compounds and antioxidative activities in parts of sweet potato (Ipomoea batata L.) plants and in home processed roots
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DOI：
10.1016/j.jfca.2010.03.025
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发表时间：
2011-02-01
影响因子：
4.3
通讯作者：
Friedman, Mendel
中科院分区：
文献类型：
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作者：
Jung, Joong-Keun;Lee, Seung-Un;Friedman, Mendel
我们测定了六种酚类化合物的HPLC，总酚含量Folin-Ciocalteu，和抗氧化活性的三种方法在甘薯植物和家庭加工的根。叶片中总酚含量最高。对8个块根品种进行了酚类物质的分区分析。根的茎端有显着更多的酚类物质。在所有样品中，主要的绿原酸是5-咖啡酰奎宁酸（5-CQA）和3，5-diCQA。3，4-diCQA以显著量存在于叶和花中，并且4，5-diCQA存在于叶中。六种家庭加工/烹饪技术将酚含量从7%（烘焙）降低到40%（油炸/煮沸）。HPLC法和Folin-Ciocalteu法测定的酚类化合物、DPPH法测定的自由基清除活性、硫氰酸铁法和硫代巴比妥酸法测定的氧化活性之间具有高度相关性。结果表明，甘薯品种和植物的不同部位之间的酚类物质有很大的变化，高酚甘薯叶，广泛消费在亚洲国家作为蔬菜，应考虑其他国家的饮食。爱思唯尔公司出版
We measured six phenolic compounds by HPLC, the total phenolic content by Folin-Ciocalteu, and antioxidative activities by three methods in the sweet potato plant and in home processed roots. Total phenolic content was highest in the leaves. Eight root varieties were partitioned and analyzed for phenolics. The stem end of the root had significantly more phenolics. In all samples the predominant chlorogenic acids were 5-caffeoylquinic acid (5-CQA) and 3,5-diCQA. 3,4-diCQA was present in significant amounts in the leaves and the flower, and 4,5-diCQA in the leaves. Six home-processing/cooking techniques reduced phenolic content from 7% (baking) to similar to 40% (deep frying/boiling). High correlations were observed between phenolic compounds determined by HPLC and Folin-Ciocalteu, radical scavenging activity by 2,2-diphenyl-1-picrylhydrazyl (DPPH), and oxidative activity by ferric thiocyanate (FTC) and thiobarbituric acid (TBA) methods. The results show that there is a large variation in phenolics among sweet potato varieties and different parts of the plant and that high-phenolic sweet potato leaves, widely consumed in Asian countries as a vegetable, should be considered for diets of other countries. Published by Elsevier Inc.