选择性

The compound 117 is 19-fold more potent than -Hup A and 37-fold more potent than Tactine, its selectivity is 31-fold more potent than Tacrine.

其中化合物117的AChE抑制活性是石杉碱甲19倍、Tactine的37倍，其选择性也是Tacrine的31倍，可作为先导化合物进一步研究。

The results showed that M.testulalis had non-preference to bean but preference to cowpea and hyacinth bean.There were significant differences in larvae quantities in bean pods between hyacinth bean and cowpea.The resistance of different cowpea varieties to M.testulalis was also different.

结果表明普通菜豆的花与荚的虫量均为零，豆野螟对普通菜豆表现出明显的不选择性，对豇豆和扁豆表现出明显的嗜食性，但对扁豆则更偏食，扁豆与豇豆在豆荚中的幼虫虫量存在极显著差异。

The invention uses benzene carbonic acid as raw material, uses hydrogen gas as reducing agent, and uses ZnO and CeO2 as main accelerating agent. In solid-bed reactor the invention carries out hydrogenation reduction reaction. The reaction temperature is 340-440Deg.C, gas hourly space velocity is 600-4800h-1, hydracid mole rate is 20:1-160:1, the selectivity ratio of benzaldehyde is 99%, and the productivity is above 95%.

该方法以苯甲酸为反应原料，以氢气为还原剂，以ZnO和CeO 2 的复合氧化物为主催化剂，在固定床反应器中，进行气相加氢还原反应，反应温度为340℃～440℃，气时空速为600h -1 ～4800h -1 ，氢酸摩尔比为20∶1～160∶1，采用本发明制备苯甲醛的选择性可达99％，收率可达95％以上。

The invention uses benzene carbonic acid as raw material, uses hydrogen gas as reducing agent, and uses ZrO2, TiO2 and Y2O3 as main accelerating agent. In solid-bed reactor the invention carries out hydrogenation reduction reaction. The reaction temperature is 340-450Deg.C, gas hourly space velocity is 600-4800h-1, hydracid mole rate is 20:1-160:1, the selectivity ratio of benzaldehyde is 96%, and the productivity is above 90%.

该方法以苯甲酸为反应原料，以氢气为还原剂，以复合氧化物ZrO 2 、TiO 2 和Y 2 O 3 为主催化剂，在固定床反应器中，进行气相加氢还原反应，反应温度为340℃～450℃，气时空速为600h -1 ～4800h -1 ，氢酸摩尔比为20∶1～160∶1，采用本发明制备苯甲醛的选择性可达96％以上，收率可达90％。

This study shows that all of these compounds exhibit good extraction abilities toward Ag~+ and Hg~(2+), and the highest extraction percentages are 38.4% and 40.5%, respectively, toward sliver and hydrargyrum picrates.

结果表明，所合成的化合物对于Ag~+和Hg~(2+)表现出较好的选择性，苦味酸银和苦味酸汞的最高萃取率分别为38.4%和40.5%。

The reductive coupling of aryl halide s to form the corresponding biaryls was effected with high selectivity in water,using formic hydrazide as a reducing agent in the presence of a catalytic amount of Pd/C.

在Pd/C催化下，以甲酰肼为还原剂，卤代芳烃通过还原偶联反应能高选择性地合成相应的联苯化合物。

To establish a highly sensitive and highly selective method for the determination of hydrazine in the urine.

目的 建立一种高灵敏度、高选择性测定尿中肼的新方法。

We have taken the advantage of this TICT behavior for the design of new fluoroionophores and synthesized a series of trans-4-(N-arylamino)stilbenes containing a hydrazone substituent, namely 1Hz、2Hz and 3Hz. According to literatures, the hydrazone and methoxyl groups can selectively interact with Cu2+ ion.

欲进一步应用於金属离子感应材料的设计，我们合成了一系列具腙取代基的反式-4-二苯乙烯胺的衍生物1Hz、2Hz、3Hz，因为文献报导腙官能基对铜有极高的选择性。

The selective oxidation of hydrocarbon is one of the most important reactions in the organic chemical industry.

烃类的选择性氧化是有机化学工业中的重要反应之一。

The therapeutic research progression of hydrocele by the method of the traditional Chinese medicine,integrated traditional and western medicine,western medicine and surgery was selected explained and the therapeutic effects of above measurement was analyzed and compared.

现选择性的阐述了中医中药、中西医结合、西医西药和外科手术治疗鞘膜积液的治疗研究进展情况。分析比较了各种方法的治疗效果。

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％。