氧氢基

From the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonylmethylate, the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonyl- methylate followed by cycloaddition reaction, was tentatively proposed.

通过研究反应过程中分离出的副产物反丁烯酸二乙酯III和4，5-二氢吡唑-3，4，5-三羧酸乙酯IV，初步提出了反应经过乙氧羰基甲基化苯并二氮杂卓翁中间体V再发生环加成反应的机制。

When oxyhydrogen free radical release the dummy man smell, directs effectively the mosquito.

氢氧自由基释放时模拟人体气味，有效把蚊子引过来。

The AM1 method was used for a quantum chemistry study of the phenol hydroxylation reaction mechanism. The possible reaction path of the phenol and oxyhydrogen free radical was optimized, and the structures of stable intermediates in the reaction mechanism were also obtained.

本文还首次采用AM1方法对苯酚羟基化反应机理进行了量子化学研究，将苯酚与氢氧自由基的反应沿可能的反应路径进行几何优化，得到反应历程上相关驻点稳定构型的三维结构。

The harmful gas such as formaldehyde, benzene, ammonia, TVOC still has bad smell, bacterium to wait with oxyhydrogen freedom radical reacts, be decomposed immediately hurtless carbon dioxide and water.

甲醛、苯、氨、TVOC等有害气体还有臭气、细菌等与氢氧自由基反应，马上被分解成无害的二氧化碳和水。

Whenpyridine was used as reductive decomposing agent, the expecting cholest-4-en-3,6-dione-22-al was obtained. However, when Zn/HOAc was used to decomposethe ozonide, C-4,5 double bond was further reduced to give cholest-3,6-dione-22-al as main product. 2 For the side-chain construction of compound (1), the solid-liquid phase-transfer Wittig reaction was used. When (3-methyl-2-oxobutyl)-triphenylarsonium bromide was used as reagent, the reaction can be carried out inmild reaction condition and the yield is higher than that when phosphorane wasused.

但使用Zn／HOAc作为分解剂时，却得到其氢化产物胆甾-3， 6-二酮-22-醛；2在甾体支链引入过程中，采用固-液相转移Wittig反应的方法，用(3-甲基)-2-氧丁基三苯基溴化胂作为试剂，反应在非常温和的条件下便可完成，而且产率比传统采用膦烷的方法更高；3在对某些甾酮化合物的选择性还原反应研究时，发现在〓还原体系中，当加入某些金属离子后，反应有更好的区域选择性和立体选择性。

Nobody could believe it when we got this result.Franz Rohrer,Jülich Research Centre, GermanyBut the good news is tempered with a warning. As co-author Franz Rohrer of the Jülich Research Centre explains, the observations also show that atmospheric chemists don't fully understand the complex reactions that control the generation and destruction of hydroxyl radicals in our atmosphere.

但是也有个坏消息：报告的合著者、Jülich研究中心的Franz Rohrer认为，从另一个角度来看，观测也说明，大气化学家还没能充分理解我们大气中这些氢氧自由基产生、消亡之间的复杂反应。

However, Davallia divaricata and Davallia mariesii had better hydroxyl radical scavenging activity than the others.

但於氢氧自由基之清除能力，则以大叶骨碎补、海州骨碎补具有较佳活性。

METHODS:This compound was synthesized via acylation and hydrogenization using aciclovir and CBZ-L-valine as meterial.

以阿昔洛韦和N-苄氧羰基-L-缬氨酸为原料，经酰化、催化氢解反应得到了新型抗疱疹病毒药物缬昔洛韦。

Ethaol exaction from ropolis ; mitochondrion ; the oxygen free radical ; lipid peroxidize ; SDH

蜂胶醇提物；线粒体；氧自由基；脂质过氧化；琥珀酸脱氢酶

Filtrates of ultrafiltration within different membrane cut-off ranges were used to test the activity of growth inhibition from WEJFS.

爱玉子种子水萃物对DNA和Clone 9细胞具有保护作用，包括降低氢氧自由基诱导的DNA损伤，与抑制过氧化氢造成Clone 9细胞的死亡。

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。