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Methods and Results— We generated a gene-targeted mouse in which the active CathA was replaced with a mutant enzyme carrying a Ser190Ala substitution in the active site.

方法和结果——我们用在活性部位Ser190Ala替代的突变酶取代有活性的CathA，培养了基因定向小鼠。

The active compound Celangulin-V, which is the main active compound against insect pest from Celastrus angulatus Max, was modified at its 6-OH and the core structure β-dihydroagarofuran polyol of Celangulins from the basic hydrolysis of the extract of the root bark of Celastrus angulatus Max was modified by combinatorial chemical method.

主要结果如下： 1、合成了苦皮藤素V6-乙酯、6-烯丙基醚和6-酮等衍生物，通过NMR方法鉴定了化合物的结构，经文献检索均为新化合物，生测结果表明酮衍生物丧失了杀虫活性，乙酯衍生物与苦皮藤素V活性相当，醚衍生物较苦皮藤素V活性提高11倍。

Chapter Ⅴ establishes the spatial model of the medium-low speed maglev vehicle to calculate the lateral dynamic response in the cases of passive guidance and active guidance, the centrically arrangement and offset arrangement of electromagnets. As a result, the comparative analyses indicate active guidance can improve evidently the lateral dynamic performances of maglev vehicle.

本文第五章建立磁浮车辆系统的空间耦合模型，并考虑电磁力的空间耦合作用，比较研究了主动、被动导向和电磁铁横向对中、错位布置下磁浮车辆的横向动力性能，为低速磁浮车辆电磁铁导向结构设计及控制方式的参数选取提供动力学理论依据。

In order to reduce the dead time and enhance the counting rate of single photon avalanche detector with higher quantum efficiency , we design a flexible and chronometrical circuit which realizes the excellent active technology with active quenching and fast reset.

该技术使探测器工作在更加安全高效的模式下，最后实验测得探测器总的死时间由原全被动模式下大于2us缩短至120ns，单光子计数率由被动中低于1MHz上升到8MHz以上，因此可以满足一些高速光子计数的需要。

When one is in his or her intuitive inference, the insula and anterior cingulated cortex are more active, and these areas are related with human social behaviors such as cooperation, trust, compassion and love; on the contrary, in rational inference, the active areas are parietal lobe and prefrontal.

人类在直觉推理时，大脑的脑岛、前扣带皮质区较活跃，这与该区连结的许多人类社会行为有关，包括合作、信任、同理心及爱情；相对的，在理性推理中，活化的区位为顶叶及前额叶。

In order to get more active compounds,two related active drugs by combination theory with raw material cinnamic acid.

目的：利用拼合原理，以桂皮酸为原料，与相关活性的药物成酯得到衍生物，以期得到活性更高的药物。

The removal of these impurities by three kinds of active carbon(coaly activated carbon,fruit hull activated carbon,woodiness activated carbon) are studied under different experimental conditions.The results show that the fruit hull active carbon is not suitable for the removal of the impurity in bittern of salt lake because its removing rate of COD and turbidity is ...

以去除盐湖卤水中COD和浊度为目的，选用煤质活性炭、果壳活性炭、木质活性炭3种不同活性炭进行净化除杂的工艺研究，结果表明：果壳活性炭对COD和浊度的去除率最低，加入量最大，不宜选用；木质活性炭在低温下(≤20℃)脱除COD效果较好，在常温下(28~45℃)去除COD和浊度的效率明显低于煤质活性炭；在震荡速度、吸附时间及吸附剂加入量均相同的情况下，煤质活性炭脱色除杂效果明显优于其余两种活性炭，在盐湖卤水的脱色净化工程中应优先选用。

As the active additive used in recharge able battery,Cobaltous oxide can improve crystal struchure of active substance,raise using rate upto 10%,shorten oxidiaing process of nickel electric pole,reduce internal stress of pole plate.

近年来氧化亚钴材料作为二次电池材料中的有效添加剂，可使电池中活性物质晶型得到改善，利用率提高10%以上，同时提高了镍电极的氧化过程，减少了极片内应力，使充放电效率得到改善，解决了使用放电不足问题，延长电池的使用寿命。

The anti-microbial activity of active materials against Valsa mail, Fusarium oxysporum, Coniothyrium diplodieua and Aspergillus nidulans were measured in vitro. The results showed that active materials extracted using acetone.

然后以提取液为供试药剂，对苹果腐烂病菌、棉花枯萎病菌、葡萄白腐病菌、构巢曲霉病菌4种植物病原真菌进行离体活性咧定。

The explanation for this is that ethylene oligomerized in the Ni catalyst active site and the oligomers containing vinyl end group served as comonomers to in situ copolymerize with the growing polyethylene chain in the active site of titanium catalyst.

催化剂的摩尔比、Al/摩尔比和聚合温度等聚合条件对催化活性及聚合物的结构与性能有明显影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。