结晶化学

The actual REE distribution in a particular apatite is often indicative of the chemical and physical conditions under which it formed.

因此这种元素组份的分布可以成为磷灰石结晶过程所处的地质学环境中化学和物理条件的指证。

The chloroform layer and the aqueous layer were separated by multiple column chromatography including macroporous resin, silica gel and polyamide column and preparative HPLC. The compounds obtained were identified by mass spectra and NMR data.

大青叶乙醇提取物，用氯仿萃取后得到氯仿层和水层，各层再分别采用硅胶柱、大孔树脂柱、聚酰胺柱、制备液相、葡聚糖凝胶柱层析及重结晶等分离手段进行分离、纯化，并应用化学性质和质谱、波谱法（1H-NMR、13C-NMR、HMBC）鉴定其化学结构。

In the present paper,ZnS:Ag nanoparticles were prepared with simple chemicals by hydrothermal method.XRD patterns indicated that the products have cubic zinc blende crystal structure.

以简单的化学试剂和实验过程，采用水热法制备出ZnS：Ag纳米发光材料。X射线衍射结果表明，产品均为结晶良好的ZnS立方闪锌矿结构。

The knowledge about crystal, distillation, brewage, dye and so on existed in the Vinayapitaka separately.

在化学方面，佛藏文献中的化学内容极为零散，律藏部分有与结晶、蒸馏酿造、染料等方面有关的内容。

Using H2SO4 as acidulant,chromic sulfate with high purity was obtained by crystallization,which was applied to leather industry as chrome tanning agent .

将电镀废水中的六价铬还原成Cr，用化学沉淀法和絮凝法将其转化为Cr3沉淀，通过硫酸酸化，结晶为高纯硫酸铬，作为皮革工业的铬鞣剂。

However, the principles are still intuitive and commonsensible and thus can't explicitly reflect the inherent relationships between the goal and related research fields of green chemistry.

然而，上述原则主要是直觉和常识的结晶，难以清晰地反映绿色化学的目标和相关研究领域的内在联系。

Key technical/technological parameters include specific core surface load, formulation and particle size of charge, decomposition volume etc were optimized through a large number of experiments.

还通过大量实验优化了多炉芯加热技术的单位炉芯表面负荷、炉料配方、原料粒度与分解量大小等关键工艺参数，并研究了在不同技术／工艺参数条件下的产品的特点、化学纯度和结晶状况。

The aluminum hydrolysis process has been investigated using chemical analysis as the main testing method, we discovered that temperature plays an important part in the formation of products and its properties, at the same time, the change of reaction with the change of temperature is a reversible process. The experiment further proved that the optimal formation temperature of AlCl3·4Al3·7.5H2O and AlCl3·7Al3·18H2O is 75℃,the productivity rate of products were higher at this temperature and the crystallizability were better.

以化学分析为主要监测手段，对AlCl3·4Al3·7.5H2O和2AlCl3·7Al3·18H2O形态过程进行了研究，结果表明，温度对于产物的行成及性能有很大的影响，并且反应随温度的变化基本上是一个可逆的过程，同时，实验表明 75℃为AlCl3·4Al3·7.5H2O和2AlCl3·7Al3·18H2O析出的最佳温度，该温度下产物的产率较高且结晶状态良好。

The content of kaolinite varies in the range of 80%to 95%.Two occurrences of kaolinite are rev ealed:one is in the form of aggregate of vermiform crystals;another is in the form of cryptocrystalline or colloidal materials.Its crystallization index is calculated to be 0.54～0.74a nd 0.47～0.53,indicating its higher degree o f order.Chemical analyses show that the compositions of kaolinite are close to its theoretical values.

光学及扫描电子显微镜、 X射线衍射分析和红外分析等系统性研究的结果表明，高岭石主要有两种存在形式，一种呈蠕虫状集晶，另一种是隐晶质或胶状高岭石，测得其结晶指数分别为 0.54～ 0.74和 0.47～ 0.53，说明其有序度偏高；化学分析结果表明，其化学成分接近于高岭石的理论值， Al2O3含量达 35%～ 37%， SiO2含量为 47%～ 48%，碱金属、碱土金属及其他氧化物含量很低。

The iodometric titration was used to determine the oxida- tion state of Fe ions and the oxygen nonstoichiometry in La1-xSrxFeO3-δ.

用FTIR、TG-DTA、XRD等对产物形成过程及结晶学特征进行了研究，考察了合成样品与Sm0.2Ce0.8O1.9的化学相容性；利用碘滴定法测定了该系列产物中Fe元素的平均表观化合价和氧的非化学计量值。

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。