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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/8713


    Title: Antioxidative properties of protein hydrolysate from defatted peanut kernels treated with esperase
    Authors: Chang, Fengming M;Chan, Chien-Chung
    Contributors: Department of Information Science and Applications
    Keywords: Amines;Chromatographic analysis;Chromatography;High pressure liquid chromatography;Ion chromatography;Ion exchange;Ketones;Metal refining;Molecular weight;Organic acids;Anti oxidative activity;Antioxidant;Antioxidative property;Ascorbic acids;Chelating activity;Cut-off;Esperase;Ion exchange chromatography;Linolenic acids;Natural antioxidants;Neutrase;Peanut;Peanut proteins;Peroxidation;Protein hydrolysate;Radical scavenging activity
    Date: 2010-03
    Issue Date: 2010-04-07 21:34:04 (UTC+8)
    Publisher: Asia University
    Abstract: The aim of this study was to facilitate development of natural antioxidants from defatted peanut kernels. Protein hydrolysates obtained from defatted peanut kernels with esperase treatment for 2 h exhibited higher antioxidative activity toward linolenic acid peroxidation than other proteases (including neutrase, pepsin, protease A and protease N). The esperase hydrolysate of peanut protein (EHPP) was further separated with 3 and 5 kDa molecular cut-off membranes to determine the influence of molecular weight. EHPP with molecular weight 3∼5 kDa showed higher relative antioxidative activity, DPPH radical scavenging activity and metal chelating activity than that with molecular weight lower than 3 kDa or higher than 5 kDa. The fraction was further purified by ion exchange chromatography and high-performance liquid chromatography; the final peanut peptides exhibited higher relative antioxidative activity (27.5) than ascorbic acid (9.5). This study reported for the first time that protein hydrolysates from defatted peanut kernels possess antioxidative activity. © 2009 Elsevier Ltd. All rights reserved.
    Relation: LWT - Food Science and Technology 43(2) :285-290
    Appears in Collections:[行動商務與多媒體應用學系] 期刊論文

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