查询词典 Zn

The biocatalyzed characters of the purified cellulases were investigated with the CMC-Na as substrate. The most appropriate catalyzed temprature for cellulase 1 is 60 "C,and 65 for cellulase 2. The two enzymes have the extreme stability at the temperatures no more than 50.The CMC-Na has the protective effect on the cellulase. The pH stability range of cellulase 1 is 4 ~ 8, and 6-9 for cellulase 2. Zn2+, Ca2+, Mg2+, K+, Li+can ativate cellulase 1. K+, Li"1 can ativate cellulase 2. Cellulase 1 can mainly decompose CMC and salicin. Cellulase 2 can decompose not only CMC and salicin, but other substrates feebly.

以羧甲基纤维素为底物时，酶1的最适催化温度为60℃，酶2的最适催化温度为65℃，在50℃以下稳定性较好，底物对酶有较强的保护作用；酶1和酶2的最适pH分别为5.5和5.5～6.0，酶1的pH稳定性范围为4～8，酶2的稳定性范围为6～9；Zn~(2+)，Ca~(2+)，Mg~(2+)，K~+，Li~+对酶1有激活作用，K~+，Li~+对酶2有激活作用；酶1主要对CMC和水杨素有分解作用，对其它底物几乎不分解；酶2除了可以分解CMC和水杨素外，对其它底物也有微弱的分解作用。

In this paper we did experiments on ingot Zn\|5%Al alloy,to find the effect of sandglass extrusion technology on the microstructures and properties of the test mate.

沙漏挤压是一种新的晶粒细化方法，通过挤压过程中产生的大塑性变形和动态再结晶而使晶粒得到细化。

In this paper we did experiments on ingot Zn\|5%Al alloy,to find the effect of sandglass extrusion technology on the microstructures and properties of the test mate...

实验结果表明：沙漏挤压工艺能够有效的细化晶粒，使材料获得均匀的等轴细晶组织和优良的综合性能，并有助于实现高应变速率超塑性

A new method of pre-separation of Cu, Ni and Zn from scandium oxide by means of extraction chromatography resin CL-P350 was proposed.

提出了将CL－P350草淋树脂用于Sc与杂质元素预分离的方法

This study main purpose investigated the effect of mechanical properties and microstructure of the strengthens Al-Zn-Mg-Cu alloys by scandium addition, and obtained high strength aluminum alloy of the best heat treatment condition by the experiment.

本论文主要目的为研究钪元素强化铝-锌-镁-铜合金之机械性质与显微组织的影响，并由实验所得最佳热处理条件之高强度铝合金。

Solution culture and pot experiments were conducted to study the characteristic of Zn uptake in Sedum alfredii Hance.

采用水培和盆栽方法研究超积累生态型东南景天吸收锌的特征。

The objectives of this study were to investigate on growth response and metal accumulation of Sedum alfredii Hance to complex levels of Zn, Cd, and Pb in both nutrient solution and soil.

因些，研究金属超积累植物对多种金属复合污染的响应及金属积累特性，对重金属污染土壤的植物修复理论与技术体系的形成具有重要的理论和实践意义。

In present study, field survey, solution culture experiment and soil culture experiment were carried out to characterize Zn uptake and accumulation of Sedum alfredii Hance.

本研究通过对中国东南部一些古老铅锌矿区植被的调查，首次发现矿山生态型东南景天是一种锌超积累植物。

Theoretical analysis and experimental results indicate that reaction of zinc with selenide as fully as possible under H2-O2 flame at about 1500℃ is the key step in the synthesis process and prolonging holding time at high temperature, which makes the diffuse reaction adequately take place, is favourable to obtain stoichiometry ZnSe polycrystalline.

理论分析和实验研究均表明：前期H2-O2焰下高温灼烧(~1500℃)使Zn和Se充分反应，是合成工艺的关键；延长后期恒温时间（不少于2周），使扩散反应进行完全，有利于获得更接近化学计量比的ZnSe多晶料。

The X-ray diffraction results of corrosion products and scanning electron microscopy analysis of corrosion surface were used to comparatively investigate the corrosion properties of Zn/Al coatings, and to study the self-sealing mechanism.

研究表明，与纯锌、纯铝涂层相比，对于钢基体，锌铝复合涂层具有更加合适的阴极保护电位，可以大大提高防护寿命；海水环境中涂层表面会形成一层致密稳定的腐蚀产物膜，能有效阻止腐蚀介质向涂层内部的渗透，涂层会保持在一个较低的腐蚀速度。

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。