选择反应

Therefore,a lower temperature(50℃)and a higher catalyst dosage were adopted in acetylation of high-grade bamboo pulp.

因而我们选择了乙酰化反应采用较低的温度(50℃)相对较高的催化剂用量3%。

The selective oxidation of propane to acrolein is an important reaction for the utilization of light alkanes.

丙烷选择氧化制丙烯醛是低碳烷烃优化利用的一个重要反应。

Esides, Ce ions can accelerate the oxidation-reduction cycle of catalysts in the process of propane oxidation to acrolein.

i-Mo二元复合氧化物催化剂中添加适量的Ce和V组分可进一步提高催化剂晶格氧选择氧化丙烯生成丙烯醛的反应活性。

The morphology and acrosome reaction of sperm may be two important parameters to evaluate the function of fertilization.

因此，精子形态分析和顶体反应二项参数，在自然周期和IVF周期中，对受精功能的评价有着不同的参考价值和意义；同时，在人类辅助生殖技术实施过程中可以作为选择不同辅助生殖技术的依据。

We further evaluated the synergistic cytotoxicity of TRAIL in combination with actinomycin D, cisplatin and paclitaxel in A549 cell lines in vitro and in vivo.

本实验选择了人肺腺癌A549细胞瘤株作为我们实验研究的对象，通过TRAIL对人肺腺癌A549细胞诱导凋亡研究，在A549的荷瘤裸鼠的动物模型上研究了其体内的抗肿瘤活性，并进一步研究了TRAIL与化疗药物放线菌素D(actinomycin D，Act D)、紫杉醇和顺铂(cisplatin，CDDP)的联合作用对人肺腺癌A549细胞的体外协同抗肿瘤活性，通过化疗药物协同增强TRAIL抗肿瘤活性作用机制的初步研究，为降低临床化疗药的用药量，减轻其对机体的不良反应提供一定的理论基础。

The effect of alkaline metal, alkaline-earth metal or rare-earth metal oxides doping to Pd/γ-Al〓O〓 on the properties of supported palladium catalysts were investigated.

研究含氧条件下单Pd催化剂上进行丙烯选择催化还原NO的反应，考察浸渍法制备的Pd/γ-Al〓O〓催化剂中加入碱或稀土金属氧化物助剂对NO转化率的影响，并对催化剂进行了XRD表征及在氧化气氛中饱和吸附NO后的TPD研究。

This paper selects"Preparation and characterization of palladium-lanthanum supported catalyst and its use in the amination of 2, 6-diisopropylphenol"as the research subject of thesis for Doctor's Degree, and has theoretical importance and practical value.

因此，本论文选择了"钯-镧负载型催化剂的制备、表征及其在酚类胺化反应中的应用"这一课题，具有重要的理论意义和实用价值。

The influence of handling, salinity, temperature, parasitism, and gender on the immune responses reactie oxygen species (ROS production and coelomic amoebocyte concentration of the starfish Asterias rubens was inestigated in experimental conditions.

在实验室条件下研究了海星Asterias rubens对不同选择压、盐度、温度、寄生和性别的免疫反应即活性氧和体腔阿米细胞浓度。

First, for the different molar ratio of two monomers mixtures,the different molar ratio of homogeneous polymer is obtained by choosing the proper condition(the reaction temperature is 60℃-70℃, initiator benzoyl peroxideis 0.1wt%- 0.2wt%)from carrying out bulk copolymerization and its refractive index has been measured respectively by the method of minimum deviation angle.

首先，对不同摩尔比值的两单体混合液，选择适合的工艺条件(共聚温度60℃-70℃，引发剂过氧化苯甲酰0.1wt%-0.2wt%)进行本体共聚反应，获得各摩尔比值下的匀质聚合物；并用最小偏向角法分别测量了由系列匀质聚合物制作的三棱镜的折射率。

Overall, this paper is proved to be meaningful in both theoretical explanation and practical application of biodegradation of anthraquinone resembles.

总之，通过本论文的工作，筛选并找到了一株高效降解溴胺酸的菌株，对其降解溴胺酸的特性及降解途径进行了深入的研究，不仅在理论上有助于诠释动胶菌与溴胺酸反应的实质，而且为该菌株处理溴胺酸等蒽醌类染料中间体的实际运用中操作参数的设计和选择提供依据。

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％。