选择性

Methods 109 patients(109 ears) with perforations of the ear drum were recruited from November 2007 to March 2009 . The patients were divided into 3 groups according to the size and position of perforations of the ear drum: 31 accepted myringoplasties with a fat plug , 43 accepted perichondrium via endotoscope, and 35 accepted fascia musculares via an operating microscope.

针对不同大小及位置的鼓膜穿孔患者109例109耳，选择性地采用耳内镜下脂肪组织鼓膜成形术(31耳)、软骨膜鼓膜成形术(43耳)和显微镜颞肌筋膜鼓膜成形术(35耳)，比较三组患者的治疗效果。

And the hollow fiber membranes have an O2 permeance rate of 6.38 GPU with an O2/N2 selectivity coefficient of 7.13 at 25℃and 0.5MPa.

考察了温度和压力对膜的渗透系数和选择性系数的影响，并考察了物理老化对膜性能的影响。

This is especially true for applications burning coal, residual fuel oil, and petroleum coke.

选择性催化还原系统运行的经济性、可靠性和有效性对电力用户十分重要，特别是燃煤、残油和石油焦的电厂。

The results showed that the effect of pH on the selectivity and the current efficiency is the most obvious.

结果表明pH值对选择性和电流效率的影响最大。

Results: In the comparison between phenol red colormetric method and the other methods, the corrlative coefficency was 0.9822 and 0.9813, and the bias was 1.64% and 1.59% at 15～45 mmol/L.

结果 酚红比色法与离子选择性电极法、酶法比较，相关系数分别为0.9822和0.9813，碳酸氢根测定浓度在15～45 mmol/L时的预期相对偏差均值分别为1.64%和1.59%。

A series of convenient and efficient reactions have been developed. Especially, instead of using toxic phosgene, the triphosgene was employed in the synthetic process of some receptors, which provides a convenient. safe and efficient method for the preparation of chiral unsymmetrical urea.

深入研究了它们的合成方法，实现了多种简便有效的选择性合成，特别是以三光气代替剧毒的光气，实现了一条简便、安全、有效的制备手性不对称脲的方法。

Solid at room temperature, phosgene is a solid, relatively stable, even when boiling, only a small amount of decomposition, as a substitute for phosgene, not only low-toxic and easy to use, and the mild reaction conditions, good selectivity and high yield.

固体光气在室温下是固体，比较稳定，即使沸腾时，也仅仅少量的分解，作为光气的替代物，不仅毒性低，使用方便，而且反应条件温和，选择性好，收率高。

The ratio of linear to branched of the aldehyde is not significant influenced by the phosphine concentration.

循环实验中证明该催化体系有较好的稳定性，其催化活性和选择性基本没有变化。

The induction of acylamide group can enhance the stereoselectivity of photochemistry and be used in other chemistry fields.

通过在二苯甲酮上引入酰胺羧酸类活性基团，不仅可以作为光化学前体用于提高光反应的立体选择性，而且还可直接应用于其他化学领域。

Keywords: solid phase organic synthesis; stereoselective reaction; heterogeneous photosensitization

中文关键词：固相有机合成；立体选择性反应；非均相光敏异构化

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。