查询词典 potassium dichromate

Determination of purity of potassium dichromate by Coulometric Titrimetry

铬酸对铝的溶解度小，能保持原来被粘物的精度和表面光洁度，适用于尺寸容差小，表面光洁度高的零件。

To further explore tillage practices for improving soil structure, the effect of different tillage practices on the structure and organic carbon of tilth soils were investigated using routine method (Wet-sieving, Potassium dichromate volumetry and Core-cutting sampling).

为了寻求能够提高土壤结构稳定性的耕作模式，在陇中黄土高原半干旱区连续7年的定位试验研究基础上，采用常规分析方法(湿筛法、重铬酸钾容量法、环刀法)，研究了不同耕作方式对耕层土壤结构性能及有机碳含量的影响。

The positive rate was 62.5%. The allergens with higher positive rate were nickel sulfate, 4 Phenylenediamine base, fragrance mix, potassium dichromate and formaldehyde. The positive results were found in patients with face dermatitis, eczema, contact dermatitis, urticaria and pruritus.

阳性率较高的过敏原依次为：硫酸镍、对苯二胺、芳香混合物、重铬酸钾、甲醛，斑贴阳性的病种有面部皮炎、湿疹、接触性皮炎、荨麻疹、瘙痒症。

Soil organic matter, total nitrogen, available nitrogen and pH are measured with high temperature potassium dichromate oxidation-capacity, semiminim karl method, alkaline hydrolysis pervasion method, and the potentionmeter method respectively.

用五点混合取样法采集广西桂林毛村岩溶区和非岩溶区典型林地、灌草丛地和耕地的0~20cm，20~40cm土壤样品，以高温外热重铬酸钾氧化－容量法测定有机质含量，半微量凯氏法测定全氮含量，碱解扩散法测定有效氮含量，电位法测定pH值。

Nickel sulfate was the most frequent sensitizer, followed by Thimerosal, Potassium dichromate, Fragrance mix and Formaldehyde. Frequencies of contact allergy to Thiuram mix, Mercapto mix, Imidazolidinyl urea, and bronopol were relatively low.

结果： 1 129 例受试者中，阳性反应747例，阳性反应率较高的变应原依次是：硫酸镍、硫柳汞、重铬酸钾、芳香混合物、甲醛，阳性反应率较低的变应原有：秋兰姆混合物、硫氢基混合物、咪唑烷基尿素、溴硝丙二醇。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。