查询词典 chromium

In the paper, a series of metallorganic compounds have been studied by the quantum-chemical calculation with proper basis sets, including:1. a series of carbonyl complexes.2. dibenzene chromium and its derivatives3. ferrocene and its derivatives4. a series of metallic complexes with acetylacetoneWe optimized the geometric configurations of a series carbonyl complexes including Ni4 Fe5, Cr6 with density functional theory B3LYP method at the different levels and confirmed the stable geometry by vibrational analyses. Then we calculated the nuclear magnetic resonance spectra with GIAO method provided by GAUSSION98 program at the different levels.

本文用量子化学计算程序，用密度泛函B3LYP方法，在恰当基组水平上，用GAUSSIAN98程序提供的GIAO方法研究了系列金属有机化合物的核磁共振谱：一、羰基配合物系列：二、二苯铬及其衍生物系列：三、二茂铁及其衍生物系列：四、乙酰丙酮的配合物系列：我们用密度泛函B3LYP方法，在不同基组水平上对第一过渡系羰基化合物的系列配合物进行了结构优化，通过振动分析确定其稳定构型，然后再用密度泛函B3LYP方法在不同基组水平上，用GAUSSIAN98程序提供的GIAO方法计算其核磁共振谱。

In this paper, the determination of trace elements including copper, manganese,cobalt, nikel and chromium in lead metasilicate by atomic absorption spectroscopyhas been investigated.

本文提出用火焰原子吸收分光光度法测定硅酸铅中的微量元素铜、锰、钴、镍和铬，并探索了样品中可能存在的干扰元素及溶剂介质酸度对测定的影响。

The influence of the K/Na modificator on structure and performance of high chromium cast iron was investigated. The melting and heat treatment process (hardening at 1000℃ and tempering at 450℃) were also obtained.

考察了K/Na变质剂对高铬铸铁组织和性能的影响，确定了合金的熔炼工艺和热处理工艺，得出最佳的淬火和回火工艺温度（淬火1000℃+450℃回火）。

In this paper the effects of the Re K Zn compound modificator on the microstructure and properties of high Chromium white cast iron as cast have been studied by the method of orthogonal design.

本文通过正交设计实验研究了Re K Zn 复合变质剂对高铬白口铸铁组织和性能的影响，借助于电子扫描显微镜、X 射线能谱仪等先进设备对其影响结果进行了分析。

Influences of types of modificator s and their added volume fractions on the structure and properties of The medium-chromium cast iron under the same experiment condition were investigated in this article.

探讨了在相同试验条件下，变质剂种类及其加入量对中铬铸铁组织和性能的影响。

In this paper the effects of the Re-K-Zn compound modificator on the microstructure and properties of high Chromium white cast iron as-cast have been studied by the method of orthogonal design. The results have been analyzed with the aid of scanning electron microscopy and energy dispersive X-ray analyzer.

本文通过正交设计实验研究了Re-K-Zn复合变质剂对高铬白口铸铁组织和性能的影响，借助于电子扫描显微镜、X-射线能谱仪等先进设备对其影响结果进行了分析。

medium-chromium cast iron ; modification ; modificator ; structure ; property ; wear resistance

在中铬铸铁的研究中发现，采用变质处理工艺能够改善中铬铸铁的组织和性能。

Monel alloy, copper-chromium alloy additives can also be other alloy materials processing .

蒙乃尔合金，铜铬合金添加剂等，也可以来料加工其他合金材料。

Monel alloy, copper-chromium alloy additives, can also processing other alloys Material.

蒙乃尔合金，铜铬合金添加剂等，也可以来料加工其他合金材料。

Ingredients: Apple Cider Vinegar, Magnesium Chelate, Monocalcium Phosphate, Inositol, Ascorbic Acid, Biotin, Mixed Tocopherols, Niacinamide, Calcium Pantothenate, Zinc Chelate, Manganese Chelate, Vitamin A Palmitate, Copper Chelate, Vitamin D, Selenium Chelate, Chromium Chelate, Pyridoxine HCl, Ribofl avin, Thiamine HCl, Molybdenum Chelate, Cyanocobalamin, Folic Acid, Vanadium Chelate, Potassium Iodide.

果醋，螯合镁，磷酸一钙，肌醇，抗坏血酸，生物素，混合生育酚，烟碱醯胺，泛酸钙，螯合锌，螯合锰，维生素A棕榄脂，螯合铜，维生素，螯合硒，螯合铬，盐酸？哆辛，核黄素，盐酸硫胺素，螯合钼，氰钴，叶酸，螯合钒，碘化钾

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。