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首页> 外文期刊>Journal of industrial and engineering chemistry >Correlation of increased antioxidation with the phenolic compound and amino acids contents of Camellia sinensis leaf extracts following ultra high pressure extraction
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Correlation of increased antioxidation with the phenolic compound and amino acids contents of Camellia sinensis leaf extracts following ultra high pressure extraction

机译:超高压提取后茶树叶片提取物中抗氧化作用增强与酚类化合物和氨基酸含量的关系

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摘要

Antioxidants are indispensable for protecting skin cell membranes against oxidative injury caused by reactive oxygen species and other free radicals. Likewise, phenolic compounds are also important barriers to such oxidative injury. In this study, we examined the correlation between increased antioxidation and the contents of phenolic compounds and amino acids in Camellia sinensis leaf extracts obtained by ultra-high pressure extraction. Compared with extracts obtained by leaching and ultrasonic extraction, to evaluate whether this method can improve the pharmacologic effects of C. sinensis leaves. The ultra-high pressure (50 and 100 MPa) extracts had tremendous enhancement of their extraction yield, l,l-diphenyl-2-picrylhydrazyl (free radical)-scavenging activity and superoxide anion radical scavenging activity, as well as the total phenolic, amino acid, and caffeine contents. The antioxidative effects were promoted not only by the phenolic compounds contents but also by other factors such as the amino acids content in the C. sinensis leaf extracts. These effects showed pressure-dependent increase with the enhanced phenolic compound and amino acid contents of the ultra high pressure extracts. Taken together, ultra high pressure extraction is a potentially useful method for the pharmaceutical, cosmetic, and food industries, because it improves the antioxidative effects of C. sinensis leaves.
机译:抗氧化剂对于保护皮肤细胞膜免受由活性氧和其他自由基引起的氧化损伤是必不可少的。同样,酚类化合物也是这种氧化损伤的重要障碍。在这项研究中,我们研究了通过超高压提取获得的山茶叶提取物中抗氧化作用增强与酚类化合物和氨基酸含量之间的相关性。与浸出和超声提取的提取物进行比较,以评估该方法是否可以提高中华绒螯蟹叶片的药理作用。超高压(50和100 MPa)提取物的提取率,1,1-二苯基-2-吡啶并肼基(自由基)清除活性和超氧阴离子自由基清除活性以及总酚类,氨基酸和咖啡因含量。抗氧化作用不仅由酚类化合物含量提高,而且还由其他因素(例如中华绒螯蟹叶提取物中的氨基酸含量)促进。这些作用表明,随着超高压提取物中酚类化合物和氨基酸含量的增加,压力依赖性增加。综上所述,超高压萃取对制药,化妆品和食品工业而言是一种潜在有用的方法,因为它改善了中华绒螯蟹叶片的抗氧化作用。

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