查询词典 chemical method

The paper introduces the chemical reaction principle and working characteristics of lead-acid battery,analyzes phenomenon and reason of battery sulfating ,gives steps of processing sulfation,and points out prevention method.

介绍了铅酸蓄电池化学反应原理和工作特性，分析了电池产生&硫酸化&的现象及原因，给出了解决&硫酸化&电池的处理步骤，同时也指出了预防产生&硫酸化&的方法。

After preparing PC-HA and β-TCP by wet chemical precipitation method separately , granular type bone grafts were collected by filtrating, freeze drying, tableting, sintering, mixing, and size screening. All the bone graft specimens were analyzed with scanning electric microscope, Fourier transform infrared spectrometer and X-ray diffraction.

本实验室以湿式化学沈淀法分别反应生成PC-HA与β-TCP后，经过滤、混合、乾燥、压锭、烧结、粉碎后以不同网目筛网控制颗粒大小，备制磷酸钙骨移植材(PC-HA/β-TCP)，藉由扫描式电子显微镜、傅氏红外光谱仪与X光绕射分析仪进行材料之物化性分析。

The main process of metal wire drawing wastewater treatment is removing impurity and demulsification. This article took Saint Electrician production workshop waste wiredrawing fluid (in which, COD content is 11 233 mg/L, pH value is 8.4 and the content of wire drawing oil is 4%) as research object, used chemical demulsification method and through laboratory experiment, adopted electrolyte and coagulant separately to deal with the wastewater.

金属拉丝废水的处理工艺主要过程是去除杂质和破乳，以赛特电工生产车间的废拉丝液为研究对象（COD含量为11 233 mg/L，pH值8.4，拉丝油含量4%），选用化学破乳法，通过实验室实验，分别采用电解质和混凝剂处理废液。

In this paper we give an improved method flow of chemical separation of quartz from marine sediments.

提供了改进了的化学分离海洋沉积物中石英单矿物的方法流程。

Antimony-doped tin dioxide nanometer powders were prepared by wet chemical co-precipitation method using tin tetrachloride (SnCl4), trichloride antimony (SbCl3) and ammonium carbonate (NH42CO3 as raw materials.

研究絮凝剂聚丙烯酰胺对锑掺杂二氧化锡前驱体的固液相分离过滤速度和产物ATO粒径的影响及其相互作用机理。

When crude price remained a high level,the quantity of bittern increased,adding method of barium chloride was innovated,and the rate of chemical reaction of barium chloride increased,the cost of caustic soda would be reduced.

介绍了SO42-在盐水生产系统中的平衡情况及去除方法，指出在原盐价格坚挺的情况下，增大卤水用量，改进氯化钡的加入方式，提高氯化钡的化学反应率，可降低烧碱生产成本。

The bacterial mutation technique is an important bacterial research technique,including traditional physical and chemical and biological method,and modern genetic mutation technique.

细菌突变技术是重要的细菌学研究技术，包括传统的物理、化学、生物学等方法及现代的基因突变技术。

The suitable reaction conditions are determined by thermal analysis for grafting systems via reactive extrusion technology. The grafted structure and grafted ratio are determined and tested by infrared spectrometry and chemical tritration method. The reaction mechanism, by-reaction inhibition, effect of initiator, and monomer on grafted products are studied extensively. Polyethylene grafted with maleic anhydride, as the hot melt adhesive for the aluminum-plastics compound pipe, is also studied as a goal for engineering application.

对反应挤出接枝体系进行了热分析，确定了合理的反应挤出工艺条件：用红外光谱和化学滴定的方法分别对接枝结构和接枝率作了定性表征和定量测定；对三种反应挤出体系的反应机理和副反应的抑制，以及引发剂、单体对接枝产物的影响进行了深入系统地研究；对PE接枝MAH作为铝塑复合管的热熔胶进行了工程化应用研究。

The suitable reaction conditions are determined by thermal analysis for grafting systems via reactive extrusion technology. The grafted structure and grafted ratio are determined and tested by infrared spectrometry and chemical tritration method. The reaction mechanism, by-reaction inhibition, effect of initiator, and monomer on grafted products are studied extensively.

对反应挤出接枝体系进行了热分析，确定了合理的反应挤出工艺条件；用红外光谱和化学滴定的方法分别对接枝结构和接枝率作了定性表征和定量测定；对三种反应挤出体系的反应机理和副反应的抑制，以及引发剂、单体对接枝产物的影响进行了深入系统地研究；对PE接枝MAH作为铝塑复合管的热熔胶进行了工程化应用研究。

The Hall effect,XPS,optical absorption,Raman scattering,and cathode luminescence have been used to study the electrical properties,crystal quality,and defects of indium-doped bulk ZnO single crystals grown by the chemical vapor transport method.

张璠 中国科学院半导体研究所，北京 100083赵有文中国科学院半导体研究所，北京 100083董志远中国科学院半导体研究所，北京 100083张瑞中国科学院半导体研究所，北京 100083杨俊中国科学院半导体研究所，北京 100083研究了In掺杂n型ZnO体单晶的化学气相传输法生长和材料性质。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。