选择性

It has been used to determine copper ion in waste water samples from hydrometallurgy of copper. The relative standard deviation (n=8) for the determination results of two samples were 0.8% and 1.4% and the recovery were 101% and 100%, respectively.

该离子选择性电极已用于湿法冶金废水中Cu(上标 2+)的分析，两个样品测定结果的相对标准偏差(n=8)分别为0.8%和101%，加标回收率分别为101%和100%。

Ideal catalysts are selected. Main factors influencing the selectivity of cis-pinane and the content of pinane hydroperoxide are investigated. Optimum conditions are decided.

选择了较理想的催化剂，考察了催化反应的某些因素对氢化反应中顺式蒎烷选择性、氧化反应中蒎烷氢过氧化物含量的影响，确定了适宜的工艺条件。

The role of gold is to activate molecular oxygen and promote the decomposition of cyclohexyl hydroperoxide to target products, accounting for the high activity and selectivity of gold catalysts in cyclohexane oxidation.

金在环己烷氧化过程中的作用主要表现为活化分子氧，同时促进中间产物环己基过氧化氢分解为目标产物，从而表现出较高的活性和选择性。

According to the differences in chemical and structural characters of WO42- and MoS42- the actions of them to separator molecular such as bonding, hydrophile/hydrophobia and geometry are discussed by using mineral flotation as reference.

以相似元素钨和钼的分离为例，根据WO42-和MoS42-的结构特征，从价键因素、亲水-疏水因素、几何因素等方面分析了它们与吸附剂的作用，成功选择了有色金属硫化物作为选择性吸附剂，实现钨和钼的高效分离，并进一步探讨了吸附剂的改性优化和其它类似元素的深度分离问题。

04Ppm.The modified electrode was used for selective determination of hydroquinone in the presence of resorcinol,with a satisfactory result.

该修饰电极在间苯二酚存在的条件下，能被用于选择性检测对苯二酚，得到了令人满意的结果。

Biocatalytic asymmetric synthesis renders an environmental benign, simple, efficient and high steroseletive method for production of chiral β-hydroxy acid derivatives.

生物催化的不对称合成方法以其绿色环保、简洁高效及高立体选择性已成为一个新兴的研究热点。

The decomposition of hydroxylamine hydrochloride under the reaction conditions was studied to understand its function during the amination process.

在此条件下，得到的苯胺收率为64 mol%，苯胺选择性为95.6%，转化数为48摩尔苯胺/摩尔V，此结果好于已有文献报道值。

Among them,the hypoplasia of left and/or right pulmonary arteries was found.

右心室和主动脉造影结合必要的选择性侧支血管造影仍是显示体肺侧支供血和肺动脉发育的重要方法。

In selected patient, PPV with ILM peeling is an used and effective method to treat macular hole.

对选择性病例，施行玻璃体切除并用ILM剥除是一有用且有效的治疗黄斑裂孔手术。

The synthesis process comprises using chiral phosphorus acid as catalysis, synthesizing 2-(4, 7-indoline) compound in high efficiency and highly enantioselective by using sulfur imide and 4, 7-indoline compound, and products can be used to prepare several 2-dimethylamino indoline compounds with high optical activity through oxidation reaction.

以手性磷酸作为催化剂，由磺酰亚胺和4，7-二氢吲哚化合物可以高效率高对映选择性的合成2-甲氨基(4，7-二氢吲哚)化合物；产物可以经过氧化反应用于制备多种高光学活性的2-甲氨基吲哚化合化合物。

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％。