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The reduction of ferric oxide may result from the Fe phase, which would increase the electrical conductivity of B〓C coating.

涂层中金属Fe杂质相的存在,使得它的电导率同含铁量低的碳化硼粉末所制得的涂层相比出现明显偏高。

METHODS: Heparin with an aldehyde group as reducing end was prepared by nitrous acid degradation method.

将肝素钠用亚硝酸降解法降解,得到还原末端为醛基的肝素,分别溶解于二甲亚砜、含0.05 mL,0.5 mL冰醋酸的二甲亚砜溶液,再与对巯基苯胺发生还原胺化反应,用氰基硼氢化钠作还原剂,得到带巯基的肝素衍生物。

According to petrologic analysis of 18 samples of altered rock, phlogopite rock , with regard to its B 2O 3 content, it is generally restricted to the outside of the ore bed, having certain ties with the boron minerlization while no ties are found in altered rock of the same type associated with veins of diorite porphyrite.

其中金云母岩多分布在含矿层外带,通过对 1 8件金云母岩样品中B2 O3含量分析,表明正常蚀变岩中的金云母岩与硼矿有一定的关系,而由闪长玢岩脉体侵入影响下形成的金云母岩则与矿化无关。

Lead and cadmium in printing inks for the application of enamels on borosilicate glass.

用於硼矽玻璃瓷漆的印刷油墨所含的铅及镉。

Lead and cadmium in printing inks for the application of enamels on borosilicate glass.

做为硼矽酸盐玻璃印刷的瓷釉墨水中所含的铅和镉。

This work is useful to improve the thermodynamic model for salt lake brine systems containing Lithium and borates and to make utilization of the resources in salt lake.

对完善含锂、硼盐湖卤水体系的热力学模型和盐湖资源的综合开发利用具有重要的意义。

Generally the catalysts have high activity and good selectivity. At present the coupling reactions of organoborahes with terminal olefins s acid chlorides and aryl halides play an important synthetic approaches in organoborane chemical. The catalysts can be used by many kinds of organometal compounds such as: irons cobalt nickel ruthenium rhodium palladiums titaniums zirconiums tins indium and lithium organic compounds; The achievement has been amazed in preparing of unsaturated or saturated compounds and in synthesizing of natural products bioactive molecules and chiral compounds.

目前,卤代烃与不饱和烃的偶联反应和有机硼试剂与酰卤和卤代烃的偶联反应已成为有机合成的研究热点,此类反应可用铁、钴、镍、钌、铑、钛、锆、锡、铟、锂等多种有机金属化合物来催化,用于形成含饱和或不饱和C-C键的化合物,并已在天然产物、液晶、具有生理活性物质和手性化合物的合成中应用。

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。