The effects of the initial calcium/ phosphorus molar ratio and the pH of the solution on the microstructure and phase composition of the powders were studied by scanning electron microscopy ( SEM) and X-ray diffractometry ( XRD). 通过扫描电子显微镜(SEM)和X射线衍射分析(XRD)研究了配料的Ca/P物质的量比和溶液的pH值对粉体显微结构和相组成的影响。
Studies on Lattice Parameter, Molar Volume and Excess Molar Volume of Pb-Based a-Phase Solid Solution in Pb-Sn-Cd Ternary System Pb-Sn-Cd三元系Pb基α相固溶体点阵参数、摩尔体积、超额摩尔体积的研究
Measurement of partial molar volumes in acetic acid aqueous solution 醋酸水溶液中偏摩尔体积的测定
While the optimum condition for 24 hours were 26 ℃, water/ oil molar ratio 60, pH 7.6, the buffer solution concentration and the additive CaCl_2 had little effects on the reaction. 反应24h时,最适条件为26℃、n(水)/n(油)比60p、H7.6,缓冲液浓度及CaCl2的影响不显著。
Mix 2-Aminopyrimidine and adipic acid together in 1:1 molar ration in the Solution of alcohol-water which mixed to a certain scale. 2氨基嘧啶与己二酸等摩尔混合,以一定比例的乙醇水溶液为溶剂。
Studies on Intra-abomasal infusion of different levels of glucose, casein and thier mixture and higher acetic acid molar proportion VFA solution to manipulate energy conversion in beef cattle 真胃内灌注不同水平的葡萄糖和酪蛋白对高乙酸比例VFA增重效率调控的研究
Partial molar volumes were measured in acetic acid aqueous solution at 20 ℃ and 30 ℃. 研究测定了20℃和30℃温度下醋酸水溶液中的偏摩尔体积,结果表明;
Molar Conductance Mensuration of Infinitely Dilute Weak Electrolyte Solution 弱电解质溶液无限稀时的摩尔电导测定
Besides, the peculiarity of formate brines solutions in pure and mixed system were studied, such as fundamental function and compatibility with polymeric additives, it can be provided that molar concentration of pure cesium formate solution with its viscosity is liner relation. 通过对甲酸盐单相和复配体系水溶液的特性研究(水溶液基本性能、水溶液与聚合物的配伍性、水溶液的腐蚀性),得到单相甲酸铯水溶液的摩尔浓度与其粘度呈线性关系。
The molar volumes show a positive deviation from the behavior of the ideal solution, and the contribution of the solute Cd to excess molar volumes VE is much larger than that of the solute Sn. 摩尔体积对理想溶液行为呈正偏差,且Cd对超额摩尔体积的贡献远大于Sn。
Through the coagulating test to treat simulating turbid water, the best parameters have been obtained by applying orthogonal design: Fe/ Si molar ratio, Na_2SiO_3 · 9H_2O solution polymerizing time, reacting time, reacting temperature and Al/ Si molar ratio. 本文采用正交试验法,通过模拟浊水的混凝试验,确定Fe/Si摩尔比、Na2SiO3.9H2O溶液聚合时间、反应时间、反应温度和Al/Si摩尔比等最佳参数;
The principle and method on determination of Fe~ 3+ molar linear absorption coefficient by spectrophotometry are introduced and the process of making Fe~ 3+ standard solution is described. 介绍了采用分光光度法测定Fe3+离子摩尔线性吸收系数的原理、方法及Fe3+离子标准溶液的制备过程;
The orthogonal optimum selection of stability constants and molar absorbance coefficients of Co ( SCN)_n complexes in DMSO-Ketone-Water solution [Co(SCN)n]~(2-n)配合物在二甲基亚砜丙酮水溶液中稳定常数和摩尔吸光系数的正交优选
For the equilibrium system which involves a few coloured species, this method can conveniently be employed to determine the equilibrium constant, the molar absorptivity of individual coloured species and the equilibrium concentration of individual species in the solution. 对水溶液中存在数种有色物质的简单平衡体系,该法可方便地测得反应的平衡常数,各有色物质的摩尔吸光系数及各物质的平衡浓度。
An experimental method for determining the limit molar conductivity of weak electrolyte solution was set up, and it could be applied to the experimental teaching of physical chemistry. 从而设计出一种测定弱电解质溶液无限稀释摩尔电导率的实验方法,应用于物理化学实验教学。
The following preparation conditions were examed: preparation methods, molar ratio of Fe/ Zr, molar content of Si, pH value of coprecipitation, aging time, precalcination temperature, concentration of impregnation solution H_2SO_4, calcination temperature and atmosphere. 考察了制备方法、Fe,Zr摩尔比、Si原子百分含量、沉淀pH值、陈化时间、预焙烧温度、浸渍液H2SO4溶液浓度、焙烧温度、焙烧气氛等对催化性能的影响。
The adsorption of dyes on aluminum-magnesium hydroxide sol possessing permanent positive charges and effects of the molar ratio of Al/ Mg in mixed solution, the types of dyes, pH were studied. 本文研究了染料在具有永久正电荷的铝镁氨氧化物上的吸附,考察了原料铝镁比、染料类型、pH等因素对吸附效果的影响,并进行了动力学、热力学研究。
Aluminum-magnesium hydroxide sol was found to be effective at removing dyes. The molar ratio of Al/ Mg in mixed solution 1: 3 was the most effective. 研究结果表明,铝镁氢氧化物溶胶具有良好的脱色效果,原料铝镁比为1:3的溶胶处理效果最佳;
A group contribution model for calculation of partial molar volumes of organic solutesin dilute aqueous solution has been established. 建立计算无限稀偏摩尔体积的基团贡献模型。
It is commonly considered that molar conductance of infinitely dilute weak electrolyte solution Λ 0 can not be measured directly, but by calculation with the molar conductance of strong electrolyte solution and law of independent ionic movement. 通常认为,弱电解质溶液无限稀时的摩尔电导∧0不能直接测定,它只能通过相关强电解质溶液无限稀时的摩尔电导及离子独立移动定律计算得出。
For the reaction system with the same nominal formula, the increase of the molar ratio of Si in alkali activator solution to total Si favors the geopolymerization in the range of low alkali activator solution modulus. 如果反应物系中名义化学式相同,在碱激液模数较低的范围内,碱激液中的硅占总硅比率增加时,有利于地质聚合反应的进行。
The low fluorescence quantum yield or small molar absorption coefficient of the analysed substances in aqueous solution precludes their trace amount determination. 水溶液中待测物质的低荧光量子产率或摩尔吸光系数使其痕量测定难度较大,故β-环糊精对其的荧光或吸光增敏作用从定量分析的角度而言颇具研究应用价值。
The conditions include reagent concentration, stabilizer concentration, reagent molar ratio, reaction time and regulating the pH of solution, and the mechanisms are discussed. 改变的实验条件主要包括反应物浓度、稳定剂用量、不同反应物用量比例、反应时间和调节溶液pH值几个方面,并对影响机理进行了讨论。
HEC with low molar substitution cannot dissolve in water, but is easily dissolved in dilute alkali solution, that is to say. it has a unique alkali-soluble ability. 其中,低摩尔取代度的HEC不溶于水中,而易溶于稀碱溶液,具有独特的碱溶性。