过氧化反应

Carboxylic acid was peroxidized in organic solvents catalyzed by lipase and glycidol was synthesized from allyl alcohol catalyzed by acid peroxide.

利用脂肪酶在有机介质中催化制备过氧酸，丙烯醇在过氧酸的作用下发生环氧化反应生成环氧丙醇。

First, for the different molar ratio of two monomers mixtures,the different molar ratio of homogeneous polymer is obtained by choosing the proper condition(the reaction temperature is 60℃-70℃, initiator benzoyl peroxideis 0.1wt%- 0.2wt%)from carrying out bulk copolymerization and its refractive index has been measured respectively by the method of minimum deviation angle.

首先，对不同摩尔比值的两单体混合液，选择适合的工艺条件(共聚温度60℃-70℃，引发剂过氧化苯甲酰0.1wt%-0.2wt%)进行本体共聚反应，获得各摩尔比值下的匀质聚合物；并用最小偏向角法分别测量了由系列匀质聚合物制作的三棱镜的折射率。

In the investigation, they found that progeria cells demonstrate only 50 percent of normal catalase activity and 30 percent of normal glutathione peroxidase activity.

分析发现，早老症细胞的催化反应是正常细胞的 50%、麸胺基硫过氧化脢的活性是正常细胞的 30%，这样糟糕的抗氧化能力，当然无法有效清除体内的自由基罗。

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联，聚氯乙烯交联后拉伸强度有一定提高，凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收，由凝胶结构分析，推断出交联反应的机理：聚氯乙烯在过氧化物和热作用下产生大分子自由基，苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应，最终通过自由基之间的偶合产生交联；证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl，提高了过氧化物的交联效率，消弱了HCl对聚氯乙烯降解的促进作用；推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长，对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生，从而提高了交联效率。

Based on all above, Cd2+、Pb2+ single and their combined pollution led to some damage effects on seed germination of Casuarina equisetifolia. The results also suggest there is a cooperative effect of Cd2+and Pb2+ on seed germination,but there is an antagonist effect on membrane lipid oxidation and antioxidants physiological characteristics in a way.

研究表明，Cd2+、Pb2+单一及复合污染都会对木麻黄的初期生长造成伤害，Cd2+、Pb2+胁迫在木麻黄种子萌发生长上表现出协同效应，在对生物体膜脂过氧化及抗氧化生理反应上存在一定程度的拮抗作用。

It is a super natural antioxidant, and can quench monomorphous oxygen, remove free radicals, and eliminate peroxide chain reaction, thus protect cells against the damage of oxidation reaction.

它可以淬灭单形态氧，清除自由基以及有效的过氧化链式反应，从而保护细胞免受氧化反应的伤害。

Horseradish peroxidase has a strong catalytic effect on the H2O2 oxidation of o -phenylenediamine to 2,3-diaminophenazine, that caused significantly decreasing of the Rayleigh scattering intensity at 420, 445 and 484 nm.

辣根过氧化酶催化H2O2氧化邻苯二胺生成黄色的2，3-二氨基吩嗪产物，反应体系在420， 445和484 nm处的Rayleigh散射光信号显著减弱。

In PN group, the light microscopic findings included inflammation cells infiltration and hepatic steatosis, and electron microscopy showed vacuole change in cytosol and rarefactive microvillus in micro-bile duct. Conclusion PN-associated liver dysfunction was related with hepatocyte oxidative injury and apoptosis.

PN肝脏损伤机制可能是PN某些配方成分应用中，脂质过氧化导致肝细胞氧化损伤，同时损伤线粒体膜，促使线粒体膜通透性增加，释放细胞色素C等凋亡相关因子，激发caspase-3等级联反应，产生肝细胞凋亡，导致肝损伤。

Strains of rhizobia were isolated from the leguminous nodules collected in Pamirs Plateau located in Xinjiang, and 118 physiological and biochemical characters of these strains and 36 known control strains such as uses of single carbon and nitrogen sources, antibiotic and dye resistances, salt and alkali tolerances, initial growth pH, growth temperature limits, litmus and milk responses, oxidase, peroxidase and urease were determined and compared.

从新疆帕米尔高原采集豆科植物根瘤，经分离纯化获得68株供试根瘤菌，并选取36株参比菌株，进行唯一碳源利用、唯一氮源利用、对抗生素和染料抗性、耐盐性、初始pH生长、温度生长范围及石蕊牛奶反应、氧化酶、过氧化氧酶、脲酶共117项生理生化性状测定，并进行比较分析。

The synthetic liquid fuel is compounded with basic material including methanol and ethanol as well as additives including stearic acid, peroxide of oil and grease, potassium chlorate, zinc peroxide, methyl benzene, methane, cyclohexane, etc.

本发明是一种合成液体燃料及其生产方法，这种燃料由基料甲醇、乙醇和硬脂酸、过氧油脂、氯酸钾、过氧化锌、甲苯、甲烷、环已烷等添加剂经混合加热反应配制而成。

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。