查询词典 radical

A study of Chemically Induced Dynamic Poiarization spectra is made, using a highly time resolved ESR, of photolized anthracenequinone radicals to determine the influence of surfactant micelles on the spin polarization of anthracenequinone anion. It is found that the CIDEP mechanism of photolization is mainly the radical pair mechanism of anthracenesemiquinone radical and of ethylene glycol ketyl R〓〓 or R〓 radical whose center is carbon in anthracenequinone/ethylene glycol system, but there is a certain amount of triplet state mechanism polarization.

分别研究了胶束和微乳液的"笼效应"对蒽醌和苯醌的光解CIDEP的影响，其结果如下：(1)对于蒽醌的CIDEP，在乙二醇溶剂中，极化的蒽醌自由基AQ〓和R〓自由基通过光解经过夺氢反应产生，其CIDEP机理主要是自由基对机理，但也包含了一部分三重态机理。

The results show that the formation of stable radical AH-R*between the antioxidant and the carbon-centred free radical R*from fat may be a main mechanism of the antioxidation to retard lipid rancid, and dihydrotanshinone I can also act as an antioxidant by donating a hydrogenatom to R*, becoming themselves an unreactive radical A*.

结果表明，抗氧化剂与油脂中碳中心自由基复合成稳定自由基，可能是丹参醌抑制或阻止油脂氧化酸败的主要途径，双氢丹参醌Ⅰ也可借助释放活泼H（本身转化成稳定自由基A*）有效清除R*。

The results show that the formation of stable radical AH-R* between the antioxidant and the carbon-centred free radical R* from fat may be a main mechanism of the antioxidation to retard lipid rancid, and dihydrotanshinone Ⅰ can also act as an antioxidant by donating a hydrogenatom to R*, becoming themselves an unreactive radical A*.

结果表明，抗氧化剂与油脂中碳中心自由基复合成稳定自由基，可能是丹参醌抑制或阻止油脂氧化酸败的主要途径，双氢丹参醌Ⅰ也可借助释放活泼H（本身转化成稳定自由基A*）有效清除R*。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理，获得以下结果：1）建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型；2）获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率，其值随溶剂而变化，范围在0.01-0.5；3）运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程，得到相应速率常数；对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟；4）（6-4）光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解，恢复二嘧啶的结构。

Cent of patient of 51 breast cancer is the method two groups, use medical group of biology albumen rubber 25 routine breast cancer is improved effect a radical cure glue of use biology albumen is achieved in the operation when art, did not use medical group of biology albumen rubber 26 routine breast cancer is improved effect a radical cure biology albumen gum is not used when art, the 1st day drainage after observing art always makes the discharge, hypodermic case that accumulate fluid after quantity, art, in order to decide medical biology albumen glue is improved to breast cancer the precautionary effect that effects a radical cure fluid is accumulated hypodermically after art.

方法51例乳腺癌患者分为两组，采用医用生物蛋白胶组25例行乳腺癌改良根治术时在手术创面使用生物蛋白胶，未用医用生物蛋白胶组26例行乳腺癌改良根治术时不使用生物蛋白胶，观察术后第1天引流量、术后总引流量、皮下积液情况，以确定医用生物蛋白胶对乳腺癌改良根治术后皮下积液的预防效果。

A study of Chemically Induced Dynamic Poiarization spectra is made, using a highly time resolved ESR, of photolized anthracenequinone radicals to determine the influence of surfactant micelles on the spin polarization of anthracenequinone anion. It is found that the CIDEP mechanism of photolization is mainly the radical pair mechanism of anthracenesemiquinone radical and of ethylene glycol ketyl R〓〓 or R〓 radical whose center is carbon in anthracenequinone/ethylene glycol system, but there is a certain amount of triplet state mechanism polarization.

分别研究了胶束和微乳液的&笼效应&对蒽醌和苯醌的光解CIDEP的影响，其结果如下：(1)对于蒽醌的CIDEP，在乙二醇溶剂中，极化的蒽醌自由基AQ〓和R〓自由基通过光解经过夺氢反应产生，其CIDEP机理主要是自由基对机理，但也包含了一部分三重态机理。

Results:3 cases enlarged radical operation,11 cases radical operation,3 cases simplified radical operation,1 case simple tumor-ectomy were performed,and 11 cases axillary lymphy nodes metastases were found(61.1%).

结果：3例扩大根治术，11例根治术，3例简化根治术，1例单纯肿块切除，腋窝淋巴结转移阳性者11例，占61.1%。

In the beginning, at the situation of high blood volume, if the blood glucose sufficient, the erythrocytic function of making ATP by glucose is normal, the free radical and the anti-free radical of the rat basicly keep balanced, erythrocytic deforming ability is not influenced greatly; while the erythrocytic function of making ATP degenerates in sport iron deficient erythrocyte formation and hemolysis, especially the former; and the vitalities of anti-free radical reduce greatly in blood, liver and Erythrocyte, the reducement of liver SOD vitality in the former and erythrocyte SOD vitality in the latter are more obvious, and the total blood SOD amounts reduce identically; The erythrocytic deforming ability reduces greatly too, but there is no obvious difference between the two groups, but the tendency of the inner-mechanism may be different needing to researching deeply later.

而长期递增的大负荷运动造成缺铁性红细胞生成或溶血发生时，红细胞利用葡萄糖制造ATP的功能下降，且前者下降更为明显；抗氧自由基活性均显著降低，HA组肝脏SOD活力和IDA组红细胞SOD活力降低更为明显，而二者血液总SOD降低一致；红细胞变形能力均显著下降，但内在机制的倾向性可能有所不同，建议进一步深入研究机理。

The results indicate that the free radical activity in kidney tissue increases significantly after exercise. As for dynamic changes of LPO, SOD and GSH-Px index based on four time tests, endurance exercise may increase the antioxidative enzyme activity in Kidney tissue, and as a result, it scavenges much more free radical resulting from exercise and enhances the ability for anti-free radical.

大鼠肾脏组织在运动结束后即刻自由基作用明显加强，从其在运动结束后4次测得肾脏组织LPO、SOD、GSH-Px和尿TP排出率指标所形成的动态变化看，耐久性运动可以提高大鼠肾脏组织抗氧化酶活性，从而清除运动时产生的大量自由基，提高大鼠肾脏组织对抗自由基的能力。

In the second part, quantum chemical AM1 methods were employedto theoretically investigate the electronic structures of maleic anhydride in ground- and excited-states. On basis of the frontier orbital theoryand three bonding principles, the possibility of reaction of active α-hydroxysuccinic anhydride carbanion and active α-hydroxy-succinic anhydride radical on polymerization process of MArespectively by alkali catalyst and by hydroxyl radical was discussed. Theanionic and radical polymerization of MA discussed also. Theoreticalstudies show that both polymerization products of MA are in the chainstructures, corresponding to the experimental findings.

第二部分用量子化学AM1方法，计算研究了马来酸酐的基态和激发态电子结构；应用前线轨道理论和成键三原则分别探讨了碱催化条件下和羟基自由基引发下马来酸酐均聚合过程中α-羟基丁二酸酐碳阴离子和α-羟基丁二酸酐碳自由基活性中间体参与反应的可能性及由它们引发的马来酸酐阴离子聚合反应机理和自由基引发聚合反应机理；理论研究表明马来酸酐的均聚合产物均为链式结构，与实验事实相相符。

It has to be computed by the host for the actual clock rate.

主控制器可以用来计算实际的时钟速率。

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