查询词典 crystal chemistry

Chemistry the existence of different kinds of crystal of the same chemical compound.

不同种的晶体拥有同一化学组成。

In the experiment,ζ-potential of the two minerals were measured, and the effects of pH, concentration of oleic acid and flotation time on the purity and recovery of SiO2 were tested. Furthermore, the crystal structure, surface characters of quartz and clinochlore, and the solution chemistry of oleic acid as the anionic collector were analyzed.

实验中测定粉石英和斜绿泥石的ζ电位、pH值、油酸浓度、浮选时间对SiO2回收率和纯度的影响；分析粉石英、斜绿泥石的晶体结构和表面性质以及油酸作阴离子捕收剂时的溶液化学。

A quantum chemistry calculation for the crystal structure of 4- benzaldehyde-2,4-dinitro phenyl hydrazone was performed by using Gaussian98 with B3LYP/6-31G basis sets.

利用Gaussian98程序，采用密度泛涵方法(B3LYP/6-31G)对4-苯甲醛缩-2，4-二硝基苯腙化合物的晶体结构进行了量化计算，利用相关参数推测了它的分子特性，结果表明，该化合物的分子结构为一大平面结构，难与金属形成配合物

Based on the quantum chemistry ab initio calculation method, density functional theory method's ultrasoft pseudopotential method and semi-empirical interatomic pair potential combined, the cohesive energy of martensite crystal cell of the high-carbon alloy steel DM8A and DM8 was calculated.

利用量子化学从头计算方法、密度泛函理论的超软赝势方法与半经验原子间相互作用对势相结合，计算出高碳合金钢DM8A钢和DM8钢马氏体晶胞的结合能信息。

Quartz crystal microbalance, which has high mass sensitivity, has the extensive applications in electrochemistry, analytical chemistry and biochemistry.

石英晶体微天平具有高灵敏度检测质量变化的特点，在电化学、分析化学以及生物化学等研究领域都有广泛的应用。

Its well-defined crystal structure and surface abundance of silanol groups offer good supports to study the surface organometallic chemistry.

沸石分子筛是一类性能优良和用途广泛的无机材料，其确定的晶体结构和丰富的表面羟基为表面金属有机化学的研究提供了良好基体。

Other factors, such as physical chemistry and protein inhibitors of crystal growth, also play a role.

其他因素，如物理化学和晶体形成蛋白抑制剂，也同样起一定作用。

Recently, crystal engineering of coordination polymer and supramolecular chemistry has become one of the particularly important and topical subjects, and also there are potential applications in the fields of medicine, absorption and selective catalysis, nonlinear optical and magnetic materials.

配位聚合物和超分子化学的晶体工程已成为近年来化学研究的热点领域之一，且在医药、吸附与选择性催化、非线性光学与磁性材料等方面显出潜在的应用价值。

The spectra of X-ray diffract revealed that its crystal is B type and the value is about 18%, far lower than that of ordinary maize starch. With the method of chemistry modification, we modified the amylose starch with acetates. The result showed that the best reaction condition was at the ratio of 1:5.3 (glucose: acerbity), with MSA 1.5% catalyzer, at 75℃ for 3 h.

利用化学改性法对高直链玉米淀粉进行醋酸酯化改性，最佳反应条件为，淀粉葡萄糖基与酸的质量比1：5.3、催化剂甲磺酸用量为体系的1.5%、反应温度75℃、反应时间3 h，在此条件下可制备取代度为2.84的醋酸酯淀粉，比普通玉米淀粉高0.78。

Using Gassian98 with LANL2DZ basis sets, the quantum chemistry calculation of the model was performed.4. A series of ligands which all include imidazolyl group were designed and synthesized. The crystal structure of one of them was determined by X-ray diffraction.

设计并合成了一系列含有咪唑基的配体，应用X-射线衍射方法测定了其中一种配体的晶体结构，并用Gaussian98程序包进行了量子化学计算。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。