κ-卡拉胶邻苯二甲酰基化衍生物的抗氧化活性研究

对κ-卡拉胶进行酸降解得到三种卡拉胶低聚糖,并进一步与苯二甲酰基合成制得三种分子量分别为1450、2520和3430的κ-卡拉胶邻苯二甲酰衍生物（LA、LB和LC）。对产物进行IR表征并对其取代度（DS）进行测定,并检测了产物对羟基自由基.OH、DPPH自由基和过氧化氢的清除活性以及还原能力。结果表明,上述三种κ-卡拉胶邻苯二甲酰衍生物的抗氧化能力强弱顺序依次为：LC〉LA〉LB,这可能与衍生物的羟基含量、取代基团的性质以及取代度等因素有关。...

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Bibliographic Details
Published in天然产物研究与开发 Vol. 23; no. 3; pp. 530 - 533
Main Author 孙涛 陶慧娜 周冬香 毛芳 谢晶
Format Journal Article
LanguageChinese
Published 上海海洋大学食品学院,上海,201306 2011
Subjects
κ-卡拉胶
抗氧化活性
邻苯二甲酰基
酸降解
酸降解
抗氧化活性
邻苯二甲酰基
κ-卡拉胶
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ISSN1001-6880
DOI10.3969/j.issn.1001-6880.2011.03.032

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Summary:对κ-卡拉胶进行酸降解得到三种卡拉胶低聚糖,并进一步与苯二甲酰基合成制得三种分子量分别为1450、2520和3430的κ-卡拉胶邻苯二甲酰衍生物（LA、LB和LC）。对产物进行IR表征并对其取代度（DS）进行测定,并检测了产物对羟基自由基.OH、DPPH自由基和过氧化氢的清除活性以及还原能力。结果表明,上述三种κ-卡拉胶邻苯二甲酰衍生物的抗氧化能力强弱顺序依次为：LC〉LA〉LB,这可能与衍生物的羟基含量、取代基团的性质以及取代度等因素有关。
Bibliography:Three κ-carrageenan oligosaccharides were prepared by acidic degradation of κ-carrageenan.Their phthaloyl derivatives with different molecular weight（LA∶1450;LB∶2520;LC∶3430） were synthesized with phthalic anhydride.The products were characterized by FI-IR,and the degrees of acylation（DS） were determined.Their antioxidant activities were evaluated by the scavenging of hydroxyl radical,1,1-diphenyl-2-picrylhrazyl radicals （DPPH）,hydrogen peroxide and reducing power.The results indicated that the orders of antioxidant activities were：LC LA LB.It may be related to the content of hydroxyl groups,the nature of substituting group and the substituting degrees.
SUN Tao,TAO Hui-na,ZHOU Dong-xiang,MAO Fang,XIE JingCollege of Food Science,Shanghai Ocean University,Shanghai 201306,China
κ-carrageenan; acid degradation; phthaloyl; antioxidant activity
51-1335/Q
ISSN:1001-6880
DOI:10.3969/j.issn.1001-6880.2011.03.032