查询词典 zinc

In the majority of roofs, timber is the principal material used, together with numerous others, such as tiles, slate s, asbestos cement, tar felt, asphalt, lead, copper, zinc, aluminium, etc.

而大多数屋面的主要建筑材料为木材，与之相配的其它材料有粘土瓦、岩板、石棉瓦、油毡、铅、铜、锌、铝等。

It was found that 78% zinc extraction was obtained at room temperature and atmosphere pressure.

试验结果表明：在常温常压下，用硫酸浸出该氧化锌矿石锌的浸出率可达到78%。

Methods The zinc concentration in red blood cell and plasma of 248 full-term infants and the mothers were determined by atonic absorption spectrometry,the infant's bilirubin levels were also measured.

方法利用原子吸收分光光度法测量248例足月新生儿及其母亲红细胞锌与血浆锌，并测定248例新生儿血胆红素值。

Aureomycin on reduction with zinc-acetic acid gives desdimethylaminoaureomycin under mild conditions and desdimethylaminodesoxyaureomycin under more drastic conditions.

金霉素在冰醋酸与甲醇溶液中，用锌粉氢解，在温和条件下，产生脱二甲胺金霉素；较剧烈条件下，则生成脱二甲胺脱羟金霉素。

This paper investigate occurrence characteristic s of copper,lead,zinc,aurum,silver,molybdenum in the ore from the Yuejingou copper polymetallic deposit,based on microprobe observation and electron microprobe analysis.

利用显微镜与电子探针对西藏拉萨跃进沟铜多金属矿床矿石进行了观察与分析，查明了矿石中Cu，Pb，Zn，Au，Ag，Mo等成矿元素的赋存特征。

This paper investigate occurrence characteristics of copper,lead,zinc,aurum,silver,molybdenum in the ore from the Yuejingou copper polymetallic deposit,based on microprobe observation and electron microprobe analysis.

利用显微镜与电子探针对西藏拉萨跃进沟铜多金属矿床矿石进行了观察与分析，查明了矿石中Cu，Pb，Zn，Au，Ag，Mo等成矿元素的赋存特征。

Some new heat stabilizers were exploited such as rare earth, organic antimony , autunite/zinc compounds, hydrotalcite and so on.

随着环保意识的逐渐加强，传统的PVC热稳定剂如铅盐类稳定剂已受到了一定的限制，相应地开发出了一系列新型的PVC热稳定剂，包括稀土类、有机锑类、钙锌复合类和水滑石类热稳定剂。

The thesis also introduced the procedure of chelate reation with the raw material of aspartame and zinc nitrate、bluestone and autunite nitrate.

在此基础上本课题合成了L-天门冬氨基酸螯合钙、L-天门冬氨基酸螯合铜。

The thesis investigated the effect of reation temperation, pH value, and material ratio on the chelating reation. To determine the L-aspartic acid zinc complex\' chelation ratio by orthogonal experiment, we get the best conditions of reaction. On this basis, the thesis synthesized L-aspartic acid autunite complex and L-aspartic acid coppe complex.

本课题探讨了反应温度、反应溶液的酸度、原料配比n：n三个方面对L-天门冬氨基酸与金属元素反应得影响，并以螯合率为指标，运用L_9(3~4)正交设计实验对影响L-天门冬氨基酸螯合锌的条件进行了研究，得出最佳的反应条件。

In this experiment, we utilized organic solvent ethanol, acetone sedimentation separation method to separate and purify metal chelates. In the mean time, the chelation ratio of L-aspartic acid/aspartame zinc、autunite、coppe、ferrous complex was determined by EDTA complexometric titration and the products\' structure were analyzed and confirmed by IR spectrometry.

本试验采用有机溶剂乙醇、丙酮沉淀分离法来分离提纯金属螯合物，借助EDTA络合滴定法测定了L-天门冬氨基酸、阿斯巴甜与金属元素钙、铁、铜、锌的螯合率，利用红外光谱对产品结构进行了分析确认。

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