查询词典 chromium

Based on this, a rapid,simple and accurate method for the determination of hexavalent chromium in alkalescent soil has been developed.

结果表明，用0.4mol／LKCl为提取剂，离心分离提取液，可简单、快速、准确地测定土壤中Cr6＋，所建立的方法适用于北方偏碱性土壤。

In this paper the as-cast microstructure, the rules of phase precipitation, the change of microstructure and minor phase content and the degeneration of aluminide coating after thermal exposure at temperature range from 850℃ to 1100℃ for 1000-3000 hours have been studied in comparison between two kinds of low chromium-high tungsten cast nickel-base superalloys.

本文对比地研究了两种低铬-高钨系列的铸造镍基高温合金的铸态显微组织，在850～1100℃范围内热暴露1000～3000小时后的相析出规律，显微组织和微量相的变化及铝化物涂层的蜕化。

In medium of mixed sulphuric acid and phosphoric acid, with N-phenylated anthranilic acid as a tracer agent, the standard solution of ammonium ferrous sulphate is used to titrate chromium.

试样以硝酸、氢氟酸溶解，加高氯酸冒烟驱除硅和氟，并将铬氧化为六价，在硫磷混合酸介质中，以N-苯代邻氨基苯甲酸为指示剂，用硫酸亚铁铵标准溶液滴定铬。

For example, ferric oxidate, chromium (Cr6+), ni ckel in wilding fume, and asbestic products, radiation of extremely low frequency electric fieldsand smoking in welding operations.

综述了与电焊工人肺癌有关的几个因素，如电焊烟尘中铁氧化物，六价铬和镍，焊接作业时石棉制品的接触和超低频电场的辐射，吸烟等。

Discussed element of the matrix in alloy of nickel radical high temperature through the experiment, advocate quantity element if the chromium, cobalt, tungsten, molybdenum, Tantalum, niobium, rhenium spectrum to spectral line of boracic ultimate analysis violates a condition, use matrix to match a law to undertake to matrix interference corrective, fixed appropriate analytic spectral line.

通过试验探索了镍基高温合金中基体元素，主量元素如铬、钴、钨、钼、钽、铌、铼等对硼元素分析谱线的光谱干扰情况，采用基体匹配法对基体干扰进行校正，确定了合适的分析谱线。

A diphenylcarbazide photometry with the bromocresol green as the internal standard for the determination of chromium in the water has been developed.

采用溴甲酚绿为内标，二苯碳酰二肼光度法测定水体中的六价铬。

The process is that chromium yeast is first washed after centificating from the cultural medium and dried and then determined by Biphenyl Carbazide Method.

确定了比较合适的有机铬检测方法：酵母粉进行振荡浸泡（100rpm）10h后，洗涤离心干燥，然后采用二苯胺基脲法检测有机铬含量。

The form of chromium in the animal, the effect of adding leather waste in the state of stress ,and the question of chromic remnant need the further study.

皮革蛋白粉中的铬在动物体内的转化形式、在较强的应激状态条件下添加皮革蛋白粉的效果、关于铬的残留问题，还需要进一步研究。

The effects of chromium on the mycelium growth,extracellular enzyme activity and exopolysaccharide of Pleurotus cornucopiae were studied.

铬浓度在100μg/mL时胞外多糖含量最高；高浓度的CrCl3·6H2O对菌丝及胞外酶活性和胞外多糖含量均有抑制作用。

Aiming at the tristep method smelting process of "electrical arc furnace+multifunction converter+VOD" for stainless steel, and centering about the dephosphorization during the process, the theoretical analysis and calculations have been carried out for the feasibility of several important links in the process chain (including desiliconization and chromium conservation in EAF, and simultaneous dephosphorization and desulfurization in ladle ) in the view of melting thermodynamics.

针对&电弧炉+多功能转炉+VOD&三步法不锈钢冶炼工艺，以脱磷为主线，从冶金热力学的角度对流程中涉及的几个重要工艺环节的可行性(包括电弧炉去硅保铬、铁水包同时脱磷脱硫等问题)进行了理论分析和计算。

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。