羟自由基

Overview of doctor of traditional Chinese medicine has fall gas relieves a cough, bowel of smooth asthma, embellish is aperient, can promote functional metabolization, exciting hydrochloric acid in gastric juice is secreted, help blood pressure of aid digestion, stomachic, balance, hematic fat, cleared oxygen is free base with hydroxide freedom base, have fight anile action very well.

中医概述有降气止咳。平喘。润肠通便，可促进功能代谢，刺激胃酸分泌，帮助消化。增进食欲。平衡血压，血脂，清除氧自由基和羟自由基，有很好的抗衰老作用。

From the results obtained in the study, the following conclusions can be made:The methylene blue and spectrophotometer method can capture the free radicals generated successfully. This is an effective way to measuring the free radicals quantitatively in cavitation, moreover it is easy to fulfill.The intensity of cavitation increases with reduction in the cavitation number. But the different mechanism of various enhancive processes (chemical and physical processes) results in different effect by cavitation number.The effect of operating parameters, such as inlet pressure, temperature and time on cavitation indicate that optimum operating conditions exist at the cavitation enhancive effect is maximum.It is important to optimize the structure of hydrodynamic cavitation reactor for achieving a desired effect. A reasonable geometric parameter can promote the enhancive effect for a fixed hydrodynamic condition.Ventilating appropriate gas to cavitating flow can increase cavitational intensity and hence promote the enhancive effect of hydrodynamic cavitation.

研究结果表明：亚甲基蓝分光光度计法，能够成功地捕捉到水力空化产生的羟自由基，是定量检测空化自由基简便易行的有效方法；空化程度随空化数的减小而增强，但对于不同的强化过程，因其强化机理不同，故空化数对强化效应的影响也不同；水力空化系统的压力、温度及时间等操作参数对空化强化效应的影响规律表明：在适宜的操作条件下可产生最佳的空化强化效果；空化发生器结构的优化设计是保证空化强化效应的重要前提，在一定的水力学条件下，合理的结构尺寸可以增强空化作用效果：往水流中适量加入干扰气体能够提高空化强度，增强空化强化效果。

The results showed Antioxidant activity was very strong; at the concentration of 0.10g/L, The inhibition rate of superoxide anion free radical(Osuperscript – subscript 4 was 48.45%, The scavenging rate of hydroxyl free radical was 67.52%. Adding 0.1% of the extracts to lard, its antioxidant activity was better than that of 0.02% BHT. The extracts from peel showed higher activities than from juice.

结果表明：荸荠皮提取物的有明显的抗氧化活性，当浓度为0.10g/L时，对超氧离子自由基O(上标–下标 4的抑制率为48.45%，对羟自由基的清除率为67.52%，其0.1%提取物对猪油的抗氧化效果优于0.02%的抗氧化剂BHT，且其活性具有剂量效应关系。

The oxygen free radicals generation system and mouse liver homogenate lipid peroxidation in vitro were used.

采用体外氧自由基生成系统和羟自由基诱导的小鼠肝匀浆脂质过氧化反应方法，评价炮制对黄柏抗氧化作用的影响。

OH and superoxide free radical(O.- 2).MethodsThe methods of DPPH.,Salicylic Acid and pyrograllol auto-oxidation were used to assay the scavenging the extract from the leaf of L. rethenicum Murr. on the three free radicals.

方法采用DPPH法、水杨酸法、邻苯三酚自氧化法分别测定黑果枸杞叶片甲醇提取物清除DPPH自由基、羟自由基和超氧自由基的能力。

Using tea polyphenol and Vc as the control, the effect of lotus seed polyphenol on scavenging OH and O2(superscript -) was studied with Fenton reaction and pyrogallol autoxidation methods.

以茶多酚和Vc为对照，采用Fenton反应法研究莲子多酚对羟自由基的清除作用；采用邻苯三酚自氧化法研究莲子多酚对超氧阴离子自由基O2

With the isolated and purified PSP as test materials, the chemical model systems were used to produce and OH. resp. And the scavenging capability of PSP on free radicals, its inhibition effect on pyrogallol autoxidation and the effects of PSP on SOD activity and MDA content in tumor-bearing mice were studied.

方法］以已分离提纯的甘薯多糖为试验材料，利用分别产生氧自由基O2(上标-和羟自由基的化学模型体系，研究甘薯多糖清除舟自由基能力及其对邻苯三酚自氧化的抑制作用和甘薯多糖对荷瘤小鼠SOD活性和丙二醛含量的影响。

The results show that the ethyl acetate extract of Alpinia oxyphylla Miquel possesses strongest DPPH radical scavenging activity and reducing power in a concentration-dependent manner.

在还原能力、清除DPPH自由基和羟自由基方面，乙酸乙酯提取物表现出了很强的抗氧化能力，呈现剂量依赖关系。

Methods The methods of DPPH , pyrograllol auto-oxidation and salicylicl acid were used in order to get the scavenging quality of DPPH free radical , superoxide free radical O2-.

方法采用DPPH法、邻苯三酚自氧化法、水杨酸法，分别测定缬草醚酯提取物清除DPPH自由基、超氧阴离子自由基和羟自由基的能力。

Based on Fenton reaction and the auto-oxidation of pyrogallol, the anti-radical activity of morinda officinalis how was studied by spectrophotometry. The morinda officinalis how has obvious scavenging effects on hydroxyl radical and superoxide anion radicalO2(superscript - with the efficiency related to concentration of morinda officinalis how.

基於Fenton反应和抑制邻苯三酚自氧化原理，分光光度法测定体系吸光度的变化研究巴戟天抗自由基活性，证明巴戟天对羟自由基及超氧阴离子自由基O2(上标-均有良好的清除作用，清除率与巴戟天的浓度有一定的量效关系。

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。