• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Wood Chemistry and Technology >Antioxidant Phenolic Compounds of Ethanolic and Aqueous Extracts from Pink Cedar (Acrocarpus fraxinifolius Whight & Arn.) Bark at Two Tree Ages
【24h】

Antioxidant Phenolic Compounds of Ethanolic and Aqueous Extracts from Pink Cedar (Acrocarpus fraxinifolius Whight & Arn.) Bark at Two Tree Ages

机译：两种树龄粉红色雪松（Acrocarpus fraxinifolius Whight＆Arn。）树皮中乙醇和水提取物的抗氧化酚类化合物

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In Central Mexico, commercial plantations of pink cedar (Acrocarpus fraxinifolius Whight & Arn.) from 7 to 15 years old are ready for harvesting to obtain wood products without current bark use. Therefore, the aim of this work was to study ethanolic and hot water extracts from A. fraxinifolius bark of 7-year-old (young) and 13-year-old (mature) trees. Yields, total phenolic, flavonoid, and proanthocyanidin contents, as well radical scavenging activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS) radicals, as well by ferric-reducing antioxidant power (FRAP) and low-density lipoprotein inhibition assays were estimated. Extracts of young tree barks showed higher phenolic content and better scavenging activity than extracts from mature tree barks; ethanolic extracts were superior to the aqueous ones. Positive correlations between polyphenol content and scavenging activity were observed. Results suggest that A. fraxinifolius bark loses phenolic content and antiradical activity as it ages. Bioactive phenolics such as gallic acid, catechin, epicatechin, and catechin gallate were identified by HPLC-DAD.
机译：在墨西哥中部，7至15岁的粉红色雪松（Acrocarpus fraxinifolius Whight＆Arn。）商业种植园已准备好收获，无需使用树皮即可获得木制品。因此，这项工作的目的是研究7岁（幼龄）和13岁（成熟）树木的fraxinifolius树皮的乙醇和热水提取物。产量，总酚，类黄酮和原花青素含量，以及1,1-二苯基-2-吡啶并肼基（DPPH）和2,2-叠氮基双-（3-乙基苯并噻唑啉-6-磺酸根）（ABTS）的自由基清除活性，还通过降低铁的抗氧化能力（FRAP）和低密度脂蛋白抑制试验进行了估算。幼树皮的提取物比成熟树皮的提取物具有更高的酚含量和更好的清除活性。乙醇提取物优于水性提取物。观察到多酚含量与清除活性之间呈正相关。结果表明，随着年龄的增长，A。fraxinifolius树皮会失去酚含量和抗自由基活性。通过HPLC-DAD鉴定了生物活性酚类，例如没食子酸，儿茶素，表儿茶素和没食子儿茶素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号