多糖是苹果渣的有效成分之一,研究了酶解法提取对多糖结构和抗氧化活性的影响.对比酶解苹果渣多糖(Polysaccharides from enzymatic Apple Pomace,PEAP)与非酶解处理苹果渣多糖(Polysaccharide from apple pomace,PAP),分析二者结构,评...多糖是苹果渣的有效成分之一,研究了酶解法提取对多糖结构和抗氧化活性的影响.对比酶解苹果渣多糖(Polysaccharides from enzymatic Apple Pomace,PEAP)与非酶解处理苹果渣多糖(Polysaccharide from apple pomace,PAP),分析二者结构,评价体外抗氧化活性.傅里叶-红外光谱及单糖分析结果表明PAP和PEAP为酸性杂多糖,主要由不同摩尔比的阿拉伯糖、鼠李糖、半乳糖、葡萄糖、木糖和半乳糖醛酸组成;PAP的分子量大于PEAP的分子量.AFM分析表明,PEAP比PAP具有更多的支链.与PAP相比,PEAP具有更强的抗氧化活性,推断可归因于PAP、PEAP结构中糖醛酸含量、分子量大小和分支结构的差异.研究为苹果渣及其多糖的应用提供了理论数据.展开更多
The essential oil of Rhodiola from Qinghai was extracted by steam distillation.The chemical constituents of the essential oil were analyzed by gas chromatography-mass spectrometry(GC/MS). More than 100 peaks were sepa...The essential oil of Rhodiola from Qinghai was extracted by steam distillation.The chemical constituents of the essential oil were analyzed by gas chromatography-mass spectrometry(GC/MS). More than 100 peaks were separated.展开更多
文摘多糖是苹果渣的有效成分之一,研究了酶解法提取对多糖结构和抗氧化活性的影响.对比酶解苹果渣多糖(Polysaccharides from enzymatic Apple Pomace,PEAP)与非酶解处理苹果渣多糖(Polysaccharide from apple pomace,PAP),分析二者结构,评价体外抗氧化活性.傅里叶-红外光谱及单糖分析结果表明PAP和PEAP为酸性杂多糖,主要由不同摩尔比的阿拉伯糖、鼠李糖、半乳糖、葡萄糖、木糖和半乳糖醛酸组成;PAP的分子量大于PEAP的分子量.AFM分析表明,PEAP比PAP具有更多的支链.与PAP相比,PEAP具有更强的抗氧化活性,推断可归因于PAP、PEAP结构中糖醛酸含量、分子量大小和分支结构的差异.研究为苹果渣及其多糖的应用提供了理论数据.
文摘The essential oil of Rhodiola from Qinghai was extracted by steam distillation.The chemical constituents of the essential oil were analyzed by gas chromatography-mass spectrometry(GC/MS). More than 100 peaks were separated.
