查询词典 selectivity

The experimental results showed that the product distribution and selectivity of the deasphalted oil from vacuum residuum was better than that from gasoline while the deasphalted oil from FCC slurry oil was worse than gasoline.

研究发现，减压渣油和掺兑催化油浆的减压渣油的丙烷脱沥青油具有较好的产物分布和选择性；而催化油浆的脱沥青油的裂化性能较差。

Objective To develop a RP-HPLC method for the enantiomeric separation of indapamide on a new chiral column CHIRALCEL OD-RHcellulose tris(3,5-dimethylphenylcarbamatecoated on a5μm silica-gel substratefor pharmaceutical study of indapamide.Methods To obtain optimistic method for the enantiomeric separation of indapamide,the inferences of the composition of mobile phase,the flow rate and the temperature on the enantiomer retentivity and selectivity were examined and discussed.

目的采 用新型反相手性色谱柱CHIRALCEL OD-RH(纤维素3，5-二甲基苯基氨基甲酸酯涂敷在5μm硅胶上)，建立吲达帕胺对映体的反相高效液相色谱拆分方法，为研究吲达帕胺手性对映体药代动力学提供基础。

The time-resolved technique currently used, is generally utilized to improve selectivity by adjusting delay sampling time. It is effective for eliminating the interference from signals with shorter lifetime to that with longer lifetime, but the revers is invalid.

目前所使用的时间分辨荧光光谱分析技术，一般都是通过延迟一定时间后再对样品信号采样，这对于消除短寿命信号对长寿命荧光信号的干扰非常有效，但不能消除长寿命信号对短寿命信号的干扰。

Because of Robeson upper limitation, the commercially available polymeric membranes often have either high permeability or high selectivity, but not two together.

普通高分子膜因受Robeson上限的限制，往往很难同时满足高渗透系数和高选择的要求，而促进传递膜却可以突破这一限制。

Ehrlich proceeded to test large numbers of chemicals for selectivity and discovered the first chemotherapeutic agents, of which Salvarsan, a drug for the cure of syphilis, was the most famous.

艾尔利克继续测试许多种化学物质，并且发现了第一种最为著名的化学治疗剂，沙弗酰，一种专治梅毒的药物。

The interaction of chemical molecules and biological ones, especially sequence specific recognition and site-specific cleavage of DNA have many applications such as in DNA sequence determinations, chromosome analyses, gene therapeutics, and recombinant DNA manipulation. So it is significant to develop artificial enzymes for the scission of nucleic acid with high activity and selectivity at normal condition.

化学小分子与生物大分子的相互作用，尤其是人工核酸定位切断试剂对DNA的切断在DNA序列测定、染色体分析、基因治疗以及DNA重组方面有着广泛的用途，因此进行人工合成核酸定位切断试剂及其与DNA的相互作用的研究具有重要的理论意义和应用价值。

By comparison recoveries of several sequential extraction procedures and selectivity of extractants for thorium in soil and scoria, Martínez-Aguirre's sequential extraction method was adopted for quantitative analysis of thorium fractions, then the optimization and evaluation of the sequential extraction method were performed.

分别采用Tessier、BCR和Martínez-Aguirre形态萃取方法对土壤和样品中钍的形态进行分析，通过对总量的回收率和萃取剂选择性比较，选择了Martínez-Aguirre连续萃取法定量样品中钍的形态，并对其进行了优化和评价。

This method is simple and rapid with high sensibility and selectivity.

本方法具有灵敏度和选择性高且操作简单、快速的特点。

The new method has higher sensitivity and better selectivity, which was used to determine water and satisfying results were obtained.

新方法具有较高的灵敏度、较好的选择性，在水的测定中获得满意的结果。

IF selectivity is a function of IF filter quality.

如果是选择性的过滤功能，如质量。

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％。