二氧化物

objective to study gastrodia elata blume to effect tau protein,sod,mda expression in gyrus hippocampi and cerebral cortex of experimental mice.methods to inject okadaic acid to mice ventriculus lateralis and to measure tau protein level,sod activity and lipid superoxide mda content of sod control group,oa injection group,oa and gastiodia elata injection solution group.results tau protein of experimental group(p＜0.05/p＞0.05),sod was lower than model group(p＜0.001) and was higher than control group(p＜0.05).conclusion gastrodia elata blume can increase sod activity and reduce tau protein expression and superoxide lipid forming in brain tissue of experimental dementia mice caused by oa.it can prevent and treat ad.

目的 观察天麻对痴呆模型大鼠海马、皮质神经元微管相关蛋白、超氧化物歧化酶和脂质过氧化物丙二醛表达的影响，探讨其治疗阿尔茨海默病(alzheimer disease，ad)的作用机制。方法用冈田酸(okadaic acid，oa)注射大鼠侧脑室造模，测定模型组、实验组、对照组海马和皮质tau蛋白、sod、mda的含量。结果实验组tau蛋白低于模型组(p＜0.001)，高于对照组(p＜0.05)；sod高于模型组(p＜0.001)和对照组(p＜0.05)；mda低于模型组(p＜0.001)，高于对照组(p＜0.05)。结论天麻可增强oa致实验性痴呆大鼠脑组织sod活性，降低mda蓄积和tau蛋白生成，具有防治阿尔茨海默病的作用。

Producing chiral epoxides and vicinal diols by means of enzymes is a very attractive method, which has high stereoselectivity, and is good for environment.

同时运用酶法拆分获得的手性环氧化物和邻位二醇具有高度立体选择性、环境友好等优势，是一个很有吸引力的方法。

Methods:The levels of plasma ET,serum malondial dehyde and super-oxide dismutase were measured by the methods of nalysis of radioimmunoassay,thiobarbiturate and xanthin oxidasein the blood samples from 68 patients with APP,and 29 normal controls.

采用放射免疫分析法、硫代巴比妥酸法及黄嘌呤氧化酶法测定68例APP组、及29例正常对照组血浆ET、血清丙二醛及超氧化物歧化酶的含量。

Objective To investigate the changes of cerebral ultramicrostructure and contents of superoxide dismutase, malondialdehyde and xanthine oxidase, and protective effect of safflor injection in chronic hypoxia-hypercapnia rats.

目的：探讨慢性低氧高二氧化碳大鼠大脑超微结构、超氧化物歧化酶、丙二醇与黄嘌呤氧化酶含量的变化，及红花注射液的保护作用。

Using the artificial water control technique in the shed of freerain and periodically changing water supply at different growth stages during annual growth period, we examined the SOD activity in leaves of %Acer truncatum% youngling to water stress .

通过旱棚人工控水，以元宝枫的生长阶段作为因素，采用三元二次通用旋转组合设计，对元宝枫不同生长阶段下供水量与供水方式对叶片中超氧化物歧化酶活性的影响进行了研究。

The activity of superoxide dismutase in the myocardial cells was determined by the diphenol method, plasma malondialdehyde content was measured by TBA assay, the culture medium LDH content was measured by the acetonic acid method, the intracellular calcium concentration was measured by fluorescence spectropho- tometer- The results was shown that aspartate-K.

结果显示，门冬氨酸钾镁能减少阿霉素中毒心肌细胞乳酸脱氢酶的释放量，降低细胞内丙二醛含量及游离钙浓度，同时可升高细胞内超氧化物歧化酶活力；结果表明，门冬氨酸钾镁可能通过抗脂质过氧化及逆转细胞内钙离子过负荷作用进而保护中毒心肌细胞。

The catalytic system composed of NHPI and transition metal ion can catalyze effectively ethane into acetic acid,cyclane into dicarboxylic acid,toluene into benzoic acid,alkene into epoxide,alkyne into acetylenic ketone,and amide into imide;NHPI used alone can catalyze adamantane to be carbonylated,hydrogen peroxide prepared by oxidization alcohol;NHPI combined with as...

NHPI与过渡金属离子组成的催化体系能高效地催化乙烷氧化为乙酸、环烷烃氧化为二元羧酸、甲苯氧化为苯甲酸、烯烃氧化为环氧化物、炔烃氧化为炔酮、酰胺氧化为酰亚胺；NHPI单独使用能催化金刚烷发生氧化羰基化反应、催化氧化醇制取过氧化氢；NHPI与有机助催化剂如偶氮二异丁腈、溴化季铵盐、蒽醌和醇等也能催化分子氧氧化反应。

These revealed that high dose copper can destroy function of erythrocytic membrane and cause oxidative stress, which may be one of the mechanisms of goat erythrocytic haematolysis induced by high dose copper. 3 High copper caused the increase of osmotic fragility of erythrocyte and AGLT50 in acor glycerine solution.

高铜导致红细胞膜超氧化物歧化酶和谷胱甘肽过氧化物酶活性降低，氧化产物丙二醛含量增多，引起红细胞抗氧化功能降低，诱发氧化胁迫，使得红细胞处于氧化应激状态，这可能是高铜致羊红细胞溶破机制之一。

The results showed that either of the extracted propolis had significant inhibitory effect on the level of triglyceride, total cholesterol, LDL-C,GPT and GOT in serum, and TC, TG and MDA in liver, but were ineffective on HDL-C, MDA, SOD and NO levels in serum. Ethanol extracted propolis also reduced the body weight, liver weight and liver index of hyperlipidemic SD rats, while water extracted propolis were adiaphorous.

结果表明：蜂胶醇提液和水提液均能有效抑制高脂血症SD大鼠血清中的甘油三酯、总胆固醇、低密度脂蛋白、谷丙转氨酶、谷草转氨酶的升高，并且能有效抑制肝脏组织中的TC、TG、MDA的升高，但对血清中的高密度脂蛋白、超氧化物歧化酶、丙二醛、一氧化氮的影响不明显；蜂胶醇提液能有效降低高脂血症SD大鼠的体重、肝重及肝指数，蜂胶水提液对体重、肝重及肝指数的影响则不显著。

In general, TiO2 synthesis used precursors for the titanium alkoxide or titanium metal salt which are hydrolyzed and thermal treatment to obtain TiO2 crystals.

传统二氧化钛合成是利用含钛的金属烷氧化物或含钛的金属盐类为前驱体，加以水解及热处理。

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。