查询词典 free radical

When this happens the "free" electron is called a free radical.

在这种情况下，"免费"的电子称为自由基。

Nitrogen dioxide is a free radical of very importance. Laser Magnetic Resonance isa powerful technique in the study of hyperfine and Zeeman characteristics of free radicals.

二氧化氮是很重要的分子，激光磁共振是研究自由基超精细结构和Zeeman特性最强有力的手段之一。

Results showed that L-THP possessed negative inotropic and negative chronotropic action, lowed left ventricular pressure and it's infinitesimal calculus, decreased heart output in per min., shorten 〓 and 〓 of action potential of ventricular papillary muscle of guinea pig and even the plate-phase of action potential disappeared in larger dose group , but prolonged 〓. we studied transmembrane transportation of 〓 after administering L-THP , L-THP not only depressed uptake and increased release of Ca 2+ in normal myocardium, but also it showed stronger inhibition in cell injured by ISO, and fully eliminated the effect of ISO increasing uptake and decreasing release of 〓. By detecting the 〓 content of ventricular single myocyte using fluorescent probe Fluo-3/AM, results correspond to that done above, L-THP decreased 〓 content inside of cell significantly. Using whole-cell mode, we observed the effect of L-THP on Ica in ventricular single cell, it was found that L-THP decreased Ica, the effect increased with increasing it's dose, and had voltage, frequency-dependency. Dose highly corelated to effect, corelative constant is 0.87. When washing cell with normal tyre's solution, Ica could recover, which proved the blocked action of L-THP on calcium channel once again. Meanwhile, L-THP reduced production of MDA in heart injured by ISO in dose-dependent manner, improved content of GSH-Px, in case tissue or cell free from free radical damage.

结果显示，该药物具有负性肌力和负性频率作用，降低左室压及其微分，终使每分心输出量减少；缩短豚鼠心室乳头肌动作电位时程的〓和APD〓，大剂量使动作电位平台消失，〓延长；同位素示踪法研究证实L-THP抑制〓摄取，促进〓释放，降低细胞内的〓含量；单通道水平的研究证实，L-THP减少豚鼠心室肌单细胞内向钙电流，且具有剂量，电压，频率依赖性，其作用易于洗脱，药物剂量与Ica也具有高度相关性（相关系数r为-0.87）；L-THP还可抑制ISO损伤心肌组织所致的丙二醛含量增加，增加谷胱甘肽过氧化物酶的量，使组织细胞免受损伤。L-THP阻断L-型〓通道，抑制〓的摄取，促进〓的释放，降低细胞内〓含量L-THP作用的离子基础。

Based on the free radical reaction mechanism of spontaneous combustion of coal, the parameters of coal free radicals, including Lande factor, concentration, line width and line height were measured using an electron spin resonance spectrograph during the processes of being crushed and oxidated at low temperature.

基于煤炭自燃的自由基作用机理，采用电子自旋共振测谱仪，测定煤体在破碎和低温氧化过程中的自由基朗德因子，浓度，线宽和线高。

Dr Jean-Michel Savoie and his team from the Institut National de la Recherche Agronomique, a governmental research institute in France, found that anti-radical activity was equivalent to, if not more, than the better known mushrooms when they measured the respective mushrooms' free radical scavenging ability.

医生让-米歇尔萨瓦和他的团队从的Institut National de la研究和agronomique ，一个政府研究机构在法国发现，抗自由基的活性相等于，如果不是更比更广为人知蘑菇时，他们测量了各自的蘑菇'清除自由基能力。

Adopt poaching and alcohol sinking to get coarse polysaccharide, then take MCP, MCP-1 and MCP-2 for studing in antioxidation activities. They have strong ability for scavenging free radical only in DPPH system and oxidation system of linolic acid induced by alkane radical, but negatively in hydroxyl system and in super-oxygen anions system. And MCP-2 is better than MCP-1, so we choose enzymolysis method to remove protein.

采用水煮醇沉工艺提取粗多糖，然后对MCP、MCP-1和MCP-2进行抗氧化活性试验，三者在DPPH体系和烷基自由基引发的亚油酸氧化体系中具有明显的清除自由基能力，在羟基自由基体系和超氧阴离子自由基体系中则呈现负清除能力，其中MCP-2要优于MCP-1，因此选用酶解法除蛋白。

New reactions found in this program include: photoinduced regioselective free radical addition to aromatic imines;photoinduced Dielse-Alder reactions of aromatic imines for synthesis of tetrahydroquinoline derivatives;Photoinduced radical cation mediated selective ring opening reaction of epoxides;Formation of novel macrocyclic crown ethers by photoinduced reaction of diazonaphthaquinones;photoinduced selective desilylation of silyl ethers.

用这种方法成功的发现了下列在有机合成中有意义的新反应：(1)光诱导产生的自由基正离子诱导的自由基对芳香亚胺的区域选择性加成反应；(2)用光诱导的芳香亚胺的Diels-Alder反应合成四氢喹啉衍生物；(3)经光诱导产生的自由基正离子基诱导的环氧化物选择性开环反应；（4）重氮萘酮在环醚中经光诱导反应形成新奇的大环冠醚；（5）硅醚的光诱导选择性脱硅基反应。

Free radical hurts biological large molecules, lets lipid peroxid- ize and damages membrane, the weakening of antiperoxidation system in vivo (vit E, SOD, GSH-PX) will increase the harmful effect of radical on cells.

自由基损伤生物大分子，使脂类过氧化，造成膜损伤；机体抗氧化体系(维生素E，超氧化物歧化酶，谷胱甘肽过氧化物酶等)作用的削弱会加重自由基的细胞毒作用。

At present time people has found that various oxidants exist in injured cells, including peroxide and other free radical (eg: peroxide anion and hydroxide radical ion); these ROS also exist in abnormal cells arose from cell cleavage block and cell function loss.

目前已经发现，损伤的细胞中含有较多的各类氧化物，包括过氧化氢以及其它自由基(例如过氧化物阴离子和氢氧根离子)；在因细胞分裂阻断以及细胞功能丧失所引起的异常细胞中也含有这些活性氧类物质。

Dr Jean-Michel Savoie and his team from the Institut National de la Recherche Agronomique, a governmental research institute in France, found that anti-radical activity was equivalent to, if not more, than the better known mushrooms when they measured the respective mushrooms' free radical scavenging ability.

医生让-米歇尔萨瓦和他的团队从的Institut National德香格里拉研究和agronomique ，一个政府研究所在法国发现，抗自由基活性，相等于，如果不是更比更好地了解蘑菇时，他们测量了各自的蘑菇'清除自由基的能力。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。