文献类型：期刊文献

中文题名：落叶松原花青素的没食子酰化及其抗氧化活性增强效应

英文题名：Galloylation of Procyanidin from Larch Bark and Its Enhancement Effects on Antioxidant Activity

作者：徐曼[1] 陈笳鸿[1] 汪咏梅[1,2] 吴冬梅[1,2] 吴在嵩[1] 张亮亮[1,2]

第一作者：徐曼

机构：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室;[2]中国林业科学研究院林业新技术研究所

年份：2010

卷号：30

期号：6

起止页码：55-60

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金："十一五"国家科技支撑计划资助(2006BAD18B0403)

语种：中文

中文关键词：落叶松树皮;原花青素;没食子酰化;抗氧化活性

外文关键词：larch bark; procyanidin; galloyl modification; antioxidant activity

分类号：TQ351.0

摘要：对落叶松树皮提取分离的原花青素(PC)进行没食子酰化反应,在其分子结构中引入具有邻三酚羟基的没食子酰基,获得改性产物没食子酰化原花青素(GPC)。红外光谱分析表明:PC经过没食子酰化反应,产物GPC形成了原花青素没食子酯的结构,羟基的数量得到增加。通过HPLC法测定产物GPC水解后生成的没食子酸量,计算其没食子酰化度为63%。测定比较了PC和GPC对DPPH自由基(DPPH.)的清除能力以及对过渡金属离子的络合能力和对油脂抗氧化性能的效果。结果表明原花青素经过没食子酰化后,其改性产物的抗氧化活性得到显著增强。
Galloylation of procyanidin was carried out using procyanidins（PC） separated from larch bark as raw material.Galloyl groups were inserted into procyanidin molecule based on esterification,and galloylated procyanidins（GPC）were obtained consequently.It was showed that galloylation had taken place and number of hydroxyls in molecule had increased from FT-IR spectra of PC and its galloylated product.Through estimation of gallic acid quantity in product hydrolysate by HPLC method,the galloylation degree was 63 %.Furthermore the researches on biological activity difference between PC and GPC were carried out through estimation of radical-scavenging activity and complexation ability for transition metal ions,as well as antioxidation ability toward fat,showing that the biological activity of procyanidin after galloylation was enhanced observably.