类黄酮化合物抗氧化的研究

论文编号:ZY094    论文字数:12671,页数:30

摘要：类黄酮是一类天然的酚类化合物，以C6-C3-C6基本构造，分为黄酮（Flavone）、黄酮醇（Flavonols）、异黄酮、黄烷酮、原花色素、查儿酮。他是植物合成的一种次生代谢产物，它以结合态(黄酮苷)或自由态(黄酮苷元)形式存在于蔬菜和茶叶等许多食源性植物中.目前已知化学结构的有6000多种。近年来由于发现黄酮类化合物具有人体保健与疾病治疗功能受到普遍重视， 如类黄酮可软化血管、抗癌、抗氧化及消除体内自由基等。类黄酮系天然存在于蔬菜、水果、茶叶及葡萄酒等饮料中的多酚抗氧化剂。
 本次实验以桑色素（morin），柚皮素（naringenin）和白杨黄素（chrysin）为研究对象，利用还原力, 超氧阴离子自由基和羟基自由基础的生成和清除抗氧化模型，研究类黄酮化合物的抗氧化活性。
 
关键词：类黄酮；抗氧化性；吸光度

Abstract：Flavonoids are a group of more than 6000 polyphenolic compounds that occur naturally in foods of plant origin. These compounds possess a common phenylbenzopyrone structure (C6-C3-C6), and they are categorized according to the saturation level and opening of the central pyranring, into flavonesflavanols, isoflavones, flavonols, flavanones, and flavanonols. It’s a phytosynthesis secondary metabolite, existing in vegetables, tea and many other food-borne plants in the form of its bond (flavonoids glycoside) or free state (flavonoids million). In recent years, the discovery flavonoids with human health and disease treatment of functional are to be universal. Flavonoids might soften the blood vessel, had the anticancer, antioxidant activities and eliminated free radical.Flavonoids are the natural polyphenol antioxidants in drink, vegetables, fruit, tea and grape wine.
 In this paper, morin, naringenin and chrysin are researched antioxidant activity, using the reducing power, superoxide anion radical and hydroxyl radical models.

Keywords：Flavonoid; Antioxygenation; Absorbance

目  录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
 1.1  类黄酮的定义 1
 1.2  理化性质.....................................................1
 1.2.1通性....................................................1
 1.2.2黄酮类化合物的鉴别与结构测定............................2
 1.3  黄酮类物质在医学，食疗保健和食品工业中的应用价值.............7
 1.4黄酮类物质的抗氧化性......................................8
2. 实验部分...........................................................11
 2.1  实验内容.....................................................11
 2.2  实验方法.....................................................12
 2.2.1还原力..................................................12
 2.2.2 超氧阴离子自由基........................................13
 2.2.3 羟基自由基的生成和清除实验..............................14
3. 结果与讨论...........................................................16
 3.1  实验数据.......................................................16
 3.1.1还原力....................................................16
 3.1.2 超氧阴离子自由基.........................................18
 3.1.3 羟基自由基的生成和清除实验...............................21
 3.2  数据结论........................................................23
4．总结与展望............................................................24
 3.1  实验总结........................................................24
 3.2  实验展望........................................................24
致谢.....................................................................25
参考文献.................................................................26