查询词典 free radical

The advantage of supercritical carbon dioxide used as an environmental medium in polymerization and reactions in supercritical carbon dioxide are described. It includes homogeneous free radical polymerizations, precipitation free radical polymerizations, dispersion free radical polymerizations, emulsion and inverse emulsion free radical polymerizations, cationic polymerizations, ring-opening polymerization, melt-phase condensation polymerizations, sol-gel polymerizations, polymer blend synthesis, catalytic chain transfer polymerizations, oxidative coupling polymerization, nitroxide-mediated radical dispersion, atom-transfer radical polymerization, reversible addition-fragmentation chain transfer polymerization, electrochemical polymerization, simultaneous one-pot combination of enzymatic and chemical polymerization, copolymerization of carbon dioxide used as monomer.

评述了ScCO2作为聚合反应介质的优点，以及在ScCO2中可进行的聚合反应类型，包括均相聚合、沉淀聚合、分散聚合、乳液及反相乳液聚合、阳离子聚合、开环聚合、熔融态缩聚、溶液-凝胶聚合、聚合物混合合成、链催化转移聚合、氧化-偶合反应聚合、氮氧自由基可控活性聚合、原子转移自由基聚合、可逆加成-断裂链转移、电化学聚合、原子转移聚合与酶催化开环聚合两种活性聚合在ScCO2中同时聚合、二氧化碳作为原料共聚合等。

Meanwhile the function of antioxidant defense system increased to enhance the ability for clearing free radical and antagonized the damage to organism from free radical. So the activity of GSH-Px and T-AOC enhanced. But the compensative ability was limited and the activity of GSH-Px decreased abruptly and the T-AOC was not increased further in cerebellum of chicken with encephalomalacia. This showed that it existed the exhaustion of GSH-Px in cerebellum of chicken with encephalomalacia.

在体内自由基蓄积的同时，机体抗氧化系统功能出现代偿性增强，提高自由基的清除能力，以对抗自由基对机体的损伤，表现为GSH-Px活性和T-AOC的增强，但机体的代偿能力是有限的，发病雏鸡小脑中GSH-Px活性的突然降低和T-AOC的不再增高，表明GSH-Px在发病雏鸡小脑中存在耗竭现象。

The content of Fe and Cu increased and the content of Zn decreased, the change of the content of Se was consistent with the change of activity of GSH-Px and the content of Ca and Co did not changed in chicken with encephalomalacia The change of Ca and trace element was all relative to the mechanism of free radical The change of Fe ion status showed that Fe acted as medium in the progress of synthesizing free radical.

脑软化雏鸡体内铁、铜含量增高，锌含量降低，硒含量的变化与GSG-Px活性的变化相一致，而钙、钴、锰的含量没有变化。

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。

Results Laminarin exhibited a dosedependent inhibitory effect on the hydroxyl free radical and superoxide anion free radical.

结果 海带多糖体外可清除O-2·及·OH；抑制 H2O2 诱导的大鼠红细胞氧化性溶血；抑制小鼠组织MDA的生成。

Free radical contents of the tooth enamel in 25 children permanent tooth and 35 milktooth samples were measured by electron spin resonance technique, and the relationshipbetween free radical content of the tooth enamel and radiation dose was also investigated.

本文用电子自旋共振技术，对25个儿童恒牙和35个乳牙釉质样品中的自由基含量进行了测定，研究了牙釉质中自由基含量与辐射剂量的关系。

Antioxidant activity of Se-PC was investigated and compared with phycocyanin by using four different free radical scavenging assays, namely, trolox equivalent antioxidant capacity assay, DPPH free radical scavenging assay, superoxide anion scavenging assay and assay for erythrocyte hemolysis mediated by peroxyl free radicals .

通过含硒藻蓝蛋白与藻蓝蛋白对4种不同的自由基清除能力的比较，即总抗氧化能力、清除DPPH自由基、过氧化物阴离子和引发红细胞溶血的过氧化氢自由基能力测定，从而对含硒藻蓝蛋白的抗氧化活性进行评价。

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。

Alkyl gallates can also low the extent of lipid peroxidation. To investigate the effects of PG and AG on livers that were injured by tetrachloride, we treamed small mice and fed them with different medicines, The conclusion is that AG and PG could scavenge free radical and protect mice livers from injuring by tetrachloride, AG was more effective than PG. 4. 3 The results of experiment for scavenging free radical of alkyl gallate in vitro showed that alkyl gallates can effectively scavenging free radical, but the parent gallic acid showed little effect. This suggested that introducing of hydrophobic group could significantly improve the anti-oxidative ability of gallic acid derivatives at large extent.

在体内没食子酸烷基酯的抗氧化效果大小顺序为：AG＞PG 4.3 体外清除自由基试验表明：没食子酸烷基酯可有效清除自由基，其能力远远大于母体没食子酸，说明引入脂肪链可相当程度上提高没食子酸衍生物的抗氧化能力。

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。