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Chromic trioxide and chromium hemitrioxide are determined with iodometry, the coefficient of variation of chromic trioxide is 0.056%, and the recovery of marked compound is 99.82-99.83%; the coefficient of variation of chromium hemitrioxide is 1.45%,and the recovery of marked compound is 98.55-99.26%; iron is determined by complexometric titration, the coefficient of variation of iron is 1.73%, and the recovery of marked compound is 99.12-99.23%;sulfate is determined by complexometric titration, the coefficient of variation of sulphate is 0.16%, and the recovery of marked compound is

Analysis Of The Chromium Electroplating Wastewater By Oxidation-reduction And Complexometric Titration-化学工程与工艺-本文采用氧化还原滴定法与络合滴定法对镀六价铬的废水中铬酸酐，三氧化二铬，铁和硫酸根的含量进行了测定：铬酸酐和三氧化二铬用碘量法测定，铬酸酐的变异系数为0.056%，加标回收率为99.82-99.83%，三氧化二铬的变异系数为1.45%，加标回收率为98.55-99.26%；铁用络合滴定法测定，其变异系数为1.73%，加标回收率为99.12-99.23%；硫酸根用络合返滴定法测定，其变异系数为0.16%，加标回收率为

Geant4 toolkit for Monte Carlo simulation is used in high energy heavy ion energy deposition simulation.

在银河宇宙射线中，400MeV/nucleon的铁离子通量相对来讲是较高的，400MeV/nucleon的铁离子对空间辐射引起的损伤和辐射剂量有重要的贡献。

SEM experimental result proved that the particle size of ammonium iron blue was uniform and about 20 nm.

SEM实验表明，铵铁蓝颗粒大小均匀、粒径约为20nm；XRD实验表明，铵铁蓝具有与Fe4[Fe6]3相同的立方晶体结构。

SEM experimental result proved that the particle size of ammonium iron blue was uniform and about 20 nm. XRD experimental result showed that ammonium iron blue was the cubic crystal structure.

SEM实验表明，铵铁蓝颗粒大小均匀、粒径约为20 nm；XRD实验表明，铵铁蓝具有与Fe4[Fe6]3相同的立方晶体结构。

Moreover, the powders of ammonium iron blue was obtained after filtrating, washing, drying and grinding the products.

将铁蓝过滤、洗涤、干燥、研磨得到铵铁蓝粉末。

Through the judgment of appearance and samples preparation of iron minerals,some detection methods of iron filings in iron minerals are introduced.

通过对铁精粉的外观、制样等情况判断几种铁精粉中含铁屑的检测方法。

Through the judgment of appearance and samples preparation of iron minerals,some detection method s of iron filings in iron minerals are introduced.

通过对铁精粉的外观、制样等情况判断几种铁精粉中含铁屑的检测方法。

Dr Zhang, who did his undergraduate degree in Shanghai before moving to America, thought iron filings, which have a large surface area, might provide a cheap alternative.

他认为铁粉的比表面积大，可以作为纳米铁的替代物，在中国只需20美分1千克，要廉价很多。

The process of iron release from horse spleen ferritin by dithiothreitol was determined by electronic spectroscopy method.

用光谱法检测了二硫苏糖醇在不同温度下对马脾铁蛋白铁核铁的释放过程。

The structure of iron core from horse spleen ferritin and the extra phosphate had an effect upon the rate of iron release, but the reaction order was not changed.

而近期的研究又进一步指出了铁蛋白铁核表层的高磷铁比结构可能与蛋白所表达的生理功能有一定的联系[7]。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐