酶的

The results show that this strain was a typical acidophile with optimal growth pH being 2.0 for hypha and pH 3.0-4.0 for the spore germination. Peptone was the most suitable nitrogen source which helped produce xylanase induced by xylan during stationary phase. The resultant xylanase reacted best at 50℃-55℃ and pH 3.5, and had activities 70% after 60 min maintenance under optimum reaction conditions.

结果表明：实验菌株嗜酸，菌丝生长最适pH为2.0，孢子萌发生长适宜pH为3.0-4.0；木聚糖诱导菌体在生长稳定期大量产生木聚糖酶，蛋白胨是菌体产酶的适宜氮源；菌株所产木聚糖酶属于酸性木聚糖酶，反应最适pH3.5、最适温度50℃-55℃，在最适反应条件下保温60min，残余酶活仍接近70%，适用于较强酸性的高温加工环境。

Activities of Aminopyrine N-demethylase, Ethoxycoumarin O-deethylase and Glutathione S-transferase in the hepatopancreas and gills of Fenneropenaeus chinensis were measured by UV spectrophotometry and fluorospectrophotometry. The effects on the activities of APND and ECOD、GST in the hepatopancreas and gills were studied following multi-oral baicalin.

用紫外分光光度法及荧光分光光度法测定中国对虾肝胰腺及鳃氨基比林－N-脱甲基酶、乙氧基香豆素－O-脱乙基酶、谷光甘肽－S-转移酶几种药物代谢酶的活性，探讨黄芩苷对上述几种酶活性的影响。

398 Neutral protease,pepsin,papain and bromelin were utilized to hydrolyze the head of Penaeus monodon .

利用AS1.398中性蛋白酶、胃蛋白酶、菠萝蛋白酶及木瓜蛋白酶对斑节对虾头蛋白进行酶水解试验，从中选出了优选试验用酶，并在此基础上对优选酶的最适酶解工艺条件进行了探讨。

Polyphenols can not be combined sufficiently the activity of enzyme decreased slowly because of insufficient cellular fragmentation in the processing of blacke tea congou. But the activity of hydrolydase will increase with the damnification of cell. So on the contrary the activity of P -glucosidase continues increasing.

工夫红茶加工过程中，揉捻阶段叶细胞并未充分破碎，使多酚类物质与酶的结合不充分，酶活性下降较少，但细胞损伤，水解酶活性会升高，因而最终结果β-葡萄糖苷酶活性反而继续上升，致使发酵阶段酶活性大于红碎茶，为工夫红茶香气的形成奠定了基础。

In accordance with increasing concentrations of Ca~(2+), Ca~(2+)-ATPase and H~+-ATPase activity in plasma membrane and tonoplast of cucumber root were increased significantly at first, then decreased slightly later; H~+-ATPase activity in plasma membrane and tonoplast of cucumber leaf was changed unremarkably; Ca~(2+)-ATPase activity in plasma membrane and tonoplast of cucumber leaf was increased significantly at first, then decreased slightly later.

低温下，随Ca~(2+)浓度的升高根中质膜和液泡膜Ca~(2+)-ATP酶和H~+-ATP酶活性及叶片中质膜和液泡膜Ca~(2+)-ATP酶活性先升高后下降，叶片中质膜和液泡膜H~+-ATP酶活性无显著变化，说明适当增加营养液中Ca~(2+)浓度后，可提高ATP酶的活性减轻低温伤害。

Now,this paper introduces the actualities of crustacean and insect chitinase research,including the chitinase s properties,structure,molecular biology and its physiological function in the periodic ecdysis of arthropods.

本文介绍了节肢动物中甲壳动物和昆虫几丁质酶的产酶种类、酶学特性、酶结构、分子生物学及其几丁质酶在节肢动物蜕皮中生理作用的研究现状。

Polyporus versicolor, Fomes lignosus and Votvariella volvcea do not produce laccase under this condition.

在富氮培养条件下，未发现有木质素过氧化物酶的生成，主要木质素降解酶为漆酶和锰过氧化物酶。

The activities of catalase, alkaline phosphatase, dehydrogenase and invertase showed some differences in the soil profiles, but there was no difference about catalase activity.

过氧化氢酶、碱性磷酸酶、脱氢酶、转化酶的活性在土壤剖面均表现出一定的差异性，仅过氧化氢酶活性没有差异。

The affinities of the two mutants for the lichenin were basically unchanged.

在酶的最适pH值上，野生酶和EGs1突变酶为6.5，而EGs2突变酶为7.0。

The researchs on isozymes indicated that some varieties of isozyme loci present during the embryo development. There are 7 esterase loci and 5 acid phosphatase loci during the periods between nucellar filament and early globular embryo; both of Est and Acp appeared the most diversity in the stage of 8-nucleate embryo sac.

用聚丙烯酰胺凝胶电泳的方法研究鹤顶兰从指状突起出现到早期球形胚形成的全过程中酯酶、酸性磷酸酶的变化发现：这一过程中酯酶表达有7个同工酶位点，酸性磷酸酶有5个同工酶位点，两者均在八核胚囊时期变化最显著。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。