羟自由基

Objective In order to make full use of the resources of Leonurus and avoid wasting,identifying the process of extracting total flavone from Leonurus and its differentiating and the effect on scavenging of hydroxyl radicals.

益母草总黄酮的提取及其对羟自由基的清除作用》这篇优秀范文是126范文网由网友投稿提供或从网络上搜集整理的，文章版权归原作者所有。

Objective In order to make full use of the resources of Leonurus and avoid wasting,identifying the process of extracting total flavone from Leonurus and its differentiating and the effect on scavenging of hydroxyl radicals.

目的 为充分利用益母草植物资源，避免浪费，探讨益母草总黄酮的提取、鉴别及对羟自由基的清除作用。

Methods The flavones were extracted by using ethanol as the solvent from Leonurus with ultrasonic wave and extraction method.A spectrophotometry was used to extract and check the flavones of Leonurus.The effect of Leonurus on scavenging of hydroxyl radicals was studied.

采用超声波乙醇浸提法从益母草中提取黄酮类物质，对所提取的黄酮类物质进行验证，并用分光光度法测定含量，用益母草总黄酮对羟自由基清除作用进行试验。

The total flavone in antioxidant substance extracted from leaves of tartary buckwheat and its scaveninging function to OH and O(superscript - subscript 2) were determined by photometry and the inhibitory action to Lipin peroxidation and its synergy with other substances were studied by iodimetry in the experiment.

从苦荞叶中提取抗氧化性物质，用光度法测定提取物中总黄酮的含量及对羟自由基和超氧阴离子O(上标-下标 2的清除作用，并采用碘量法研究了苦荞叶提取物对脂质过氧化的抑制作用及与其他物质的协同作用。

The order is TRs〓＞extraction of black tea＞TB＞TRs〓＞TFs＞ECG＞EGC＞TP＞EGC＞EC. Comparing with catechins, peroxyl radical scavenging activities of their oxidative products were stronger.

儿茶素及其氧化产物对羟自由基有明显的清除作用，其清除·OH作用强弱顺序依次为TR〓＞红茶水提物＞TB＞TR〓＞TFs＞ECG＞EGC＞TP＞EGC＞EC。

Objective To clarify the effects of carbon disulfide(CS2) on hydroxyl free radical generation in phenanthroline chemiluminescence system(Phen-system).

简乐目的探讨二硫化碳(CS2)对邻菲罗啉化学发光体系中羟自由基产生的影响。

Results Low-and high-dose 95% and 50% ethanol extracts and Jiannao Capsule group could improve the learning and memory ability of the Wistar rats, markedly enhance cerebral SOD activities and decrease the levels of MDA, and improved the suppressed activity of the hydroxyl free radical. Of them, high-dose 50% ethanol extracts exhibited the best effect. Conclusion The main effective extracts from Valeriana amurensis Smir.

结果 黑水缬草95%乙醇粗提物低、高剂量组，50%乙醇洗脱物低、高剂量组，中药对照健脑胶囊组均可增强模型大鼠的学习记忆能力，SOD活力显著增加，MDA含量降低，抑制羟自由基能力增强，尤以50%乙醇洗脱物高剂量组效果最佳。

BACKGROUND: Schisandrone has strong activities of anti-oxidation, effectively scavenges hydroxyl radical and superoxide anion, and has protective effects on cells under active oxygen stress state.

背景：华中五味子酮有强的抗氧化活性，可高效清除羟自由基和超氧阴离子，对处于活性氧应激状态下的细胞具有保护作用。

In the range of test concentration, the maximum scavenging or inhibition rate of apple polyphenol extracts to linoleic acid auto-oxidation, nitroso, hydroxyl radical generated by Fenton reaction, superoxide anion radical generated by illuminating riboflavin and pyrogallol auto-oxidation was 94.4%, 95.76%, 96.64%, 95.19% and 90.48% respectively.

在试验浓度范围内，其对亚油酸自氧化、NO_2~-、Fenton反应产生的羟自由基及光照核黄素和邻苯三酚自氧化产生的O？

Experiment results showed as follows: 1 Two kinds of reactive oxygen species exhibited remarkable damage to larvae on 3 types of different development stage.The treatment of reactive oxygen species could result in decrease of larva survival rate and inhibit metamorphosis rate of cyprid.

实验结果表明：1、二种类型的活性氧对东方小藤壶三种不同发育时期的幼虫均具有伤害作用，在其作用下，幼虫存活率的下降，变态过程受到抑制，且表现出一定的剂量效应；三种不同发育时期的幼虫对活性氧作用的敏感性存有明显的差异性，Ⅵ期无节幼虫对羟自由基的作用最为敏感。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。