抗氧化酶

Objective To study the damage effect of lead acetate on DNA and its mechanism and the changes of antioxidative enzymes in vivo.

目的 探讨醋酸铅对动物体内DNA的损伤作用、机制以及抗氧化酶的变化情况。

Accordingly to solve afore-mentioned problems, bo Wei of this Wen Yiluo tries material, studied different hormone deserves to compare, the genotype that supply system, illumination and temperature and sucrose chroma are right antheral hurt the influence with revulsive organization more, studied quite at the same time antheral hurt constituent brown to change more in the process a few kinds fight oxidation enzymatic active to change.

因此为了解决上述新问题，该文以萝卜为试材，探究了不同激素配比、供体基因型、光照和温度以及蔗糖浓度对花药愈伤组织诱导的影响，同时比较探究了花药愈伤组织褐变过程中几种抗氧化酶活性变化。

Its mechanism might be related with the inhibition of DLE on the decrease of antioxidant enzyme activities and the anti-radicals activity.

其作用机理可能与DLE抑制抗氧化酶活性降低和抗自由基活性有关。

The decrease of antioxidative enzyme activity in the musculus and hepar of the Sports anemia rats could be avoid by supplying the anti-Sports anemia Agent.

补充抗运动性贫血合剂，可以防止运动性贫血大鼠骨骼肌、肝脏中抗氧化酶活性的降低。

By means of a system of nutrient solution culture under greenhouse, the effects of different concentration of exogenous silicon on anti-oxidative system, reactive oxygen species, soluble protein and praline content, root activity and ion content in leaves and roots of Cabernet Sauvignon seedlings were investigated under salt stress condition (50 mM NaCl).

mM浓度的外源硅，研究了不同浓度外源硅处理对盐胁迫(50 mM NaCl)下赤霞珠幼苗叶片中抗氧化酶系统、活性氧代谢、可溶性蛋白质和游离脯氨酸含量，根系活力，根系及叶片中离子含量的影响，以期为外源硅在葡萄抗盐生产上的合理利用提供一定的理论依据。

objective: to achieve the soluble expression of mn-sod gene in e.coli and assay the enzyme activity of the expressed product. methods: the coding region of superoxide dismutase was amplified using pcr method from the e.coli genome. the pcr product was cloned into puc19-t vector and sequenced.in addition,the cloned coding region of mn-sod was inserted into the expression vector pet-28a to form the recombinant plasmid pet-28a-mn-sod and was then transformed into e.coli bl21 for expression.

超氧化物歧化酶(superoxide dismutase，sod)是细胞体内歧化超氧阴离子自由基(o-2)的一个抗氧化酶，按其结合的金属性离子根据其中金属辅基的不同可分为4类：cu/zn-sod、mn-sod、fe-sod和ni-sod，它们通过催化超氧阴离子自由基0-2发生歧化反应，达到清除o-2的效果，具有防御氧毒性、增强机体抗辐射损伤能力、防衰老以及治疗某些肿瘤、炎症、自身免疫疾病等功效，广受国内外科研工作者的关注和重视[1]。

These results suggest that the increase of splenocyte antilipoperoxidase activityafter the irradiation may be a pro...

上述结果提示，低剂量照射后脾细胞抗氧化酶活性增高可能是一种抗辐射损伤的保护性反应。

The physiology andbiochemical mechanism of high temperature on Rosa chinensis var floribunda and thetreatment of Ca~(2+),and Salicylic acid on Rosa chinensis var floribunda under hightemperature stress were also discussed.

同时探讨了钙离子、水杨酸处理对丰花月季品种曼海母在高温胁迫下抗氧化酶活性和抗氧化剂含量的影响，初步探明了这些处理对丰花月季耐热性诱导的生理机制。

The effect of high temperature on the electrolytic leakage of membrance, thecontent of malondialdehyde, the activities of antioxidant enzymes, and thecontent of antioxidants of Rosa chinensis var floribunda were studied and thetreatments with Ca~(2+)and Salicylic acid were taken to induce the thermotoleranceof Rosa chinensis var floribunda under high temperature stress.

丰花月季是温带地区重要的绿化树种，在高温下易导致造成花卉生长发育不良，影响花芽分化，甚至发生花蕾消蕾和生理病害。本试验以丰花月季品种曼海母和埃。霍尔恩为试材，研究了40℃高温对其叶片膜相对透性、MDA含量、抗氧化酶活性及抗氧化剂含量的影响。

These parameters did not differ from each other in figleaf gourd"s two treatments. The root temperature of 14℃didn"t induce significant changes in the total respiration rate in both species but caused an increase of the alternative respiration pathway and a decrease of the cytochrome respiration pathway, and more dead cells in root tips in cold-sensitive cucumber roots.

低温条件下，黄瓜的生长明显差于黑籽南瓜，同时根系表现出更高的超氧化物阴离子O_2~(·-产生速率、过氧化氢(H_2O_2)与膜脂过氧化产物丙二醛含量以及抗氧化酶活性。14℃根温并未引起两种作物根系的总呼吸速率发生变化，但却引起黄瓜根系的交替途径呼吸速率与细胞色素途径呼吸速率的显著变化，表现为低温下Valt的上调而Vcyt的下降。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。