查询词典 precursors

The 3 kinds of concave earthquake precursors in seismogenic process-vector, stress and telluric current concavity are summarized.

总结了反映孕震过程的矢量凹形、应力凹形、地电凹形等3种凹形震兆，阐述了水汞、水氡突跳，形变相关系数和地磁最大相关系数等前兆图像及其预报作用。

The thermolysis of organometallic precursors in combined solvents is one of the most effective methods for preparing highly crystalline and size-controlled nanocrystals.

在混合溶剂中热解金属有机前驱体是制备尺寸可控、高度晶化的纳米材料的一个有效的方法。

It is ascertained the whole tandem reaction sequence pivots on the nucleophilicity of thiazole carbenes, and the solubility of thiazolium precursors has an enormous effect on the reactions.

整个反应的历程取决于噻唑卡宾的亲核性，而卡宾前体在有机溶剂中的溶解性对反应也有较大的影响。

Similarly, in early thymocyte precursors that lack both CD4 and CD8 co-receptors, the genes for each co-receptor

提供进一步的基因平衡程序是可能的，能帮助我们定义建立和分解基因程序的密码。

The Drosophila heart related genes, tinman and wingless, have been shown to play an important role in coordinating the early formation of heart progenitor cells and precursors, yet the late function is still unexplored.

虽然果蝇心脏发育基因wingless和tinman在果蝇心脏发育的早期功能已经清楚，它们都与果蝇心脏前体细胞的形成有关，但它们在果蝇心脏发育的后期功能仍有待进一步研究。

The Drosophila heart related genes,tinman and wingless,have been shown to play an important role in corrdinating the early formation of heart progenitor eells and precursors,yet the late function is still unexplored.

虽然果蝇心脏发育基因wingless和tinman在果蝇心脏发育的早期功能已经清楚，它们都与果蝇心脏前体细胞的形成有关，但它们在果蝇心脏发育的后期功能仍有待进一步研究。

In this exper iment, we took the advantage of RNAi technique, microinjected tinman and wingless dsRNA into the early embryos in Drosophila respectively and got these two genes' RNAi phenotypes, which were very similar to that of their mutant, showing heart tube defects or no heart precursors formation.

实验运用RNAi技术，分别将tinman和wingless的dsRNA注入果蝇的早期胚胎，得到了这两个基因的dsRNA干扰表型，与两个基因的突变体表型非常相似，都表现为果蝇心脏前体细胞不能形成或心脏管缺失。

Tinman dsRNA even caused visceral mesoderm defects and the somatic muscles disruption, yet wingless dsRNA only affected heart precursors and had no effect on visceral mesoderm and somatic muscles, indicationg that the heart-related genes dsRNA interference worked effectively and exclusively in Drosphila

尤其是tinman基因的dsRNA，还引起了肠中胚层缺失和体壁肌肉组织的紊乱，而wingless基因的dsRNA却只影响心脏的形成，而不影响肠中胚层，说明dsRNA干扰具有非常强的特异性，因而不失为研究果蝇心脏发育基因功能的有效方法。

The content Of isoalkanes decreased when NiSO_4 was loaded, for supported Ni oxidecould promote the dehydrogenation of the precursors of aromatics by unimolecular reactionwhich did not generate negative hydrogen ions, and the carbonium ions could not obtainsufficient negative hydrogen ions to promote hydrogen transfer reaction.

负载氧化镍以后异构烷烃含量下降，氧化镍可以通过脱氢促进芳构化反应，使正碳离子得不到足够的负氢离子饱和使氢转移反应得到抑制。

The type, initial feeding time and concentration of precursor for HV unit formation had great effects on PHBV production in shake flasks. Propionate was selected as the better precursor for HV fraction than valerate after comprehensive survey of these two precursors. The suitable PHBV shaking-flask culture conditions were obtained through the analysis of PHBV fermentation process, the investigation of several factors by using RSA method and the fed-batch experiments. Cell dry weight, PHBV content, PHBV concentration, HV fraction and yield coefficient of HV unit to propionate were 27. 7g/L, 80.7%, 22. 4g/L, 16. 1mol% and 0.50g/g, respectively.

在共聚物PHBV的摇瓶发酵过程中，PHBV中HV组分形成的前体物质的种类、初始加入时间以及加入量是影响PHBV发酵过程的重要因素；在综合比较丙酸和戊酸这两种前体的基础上，选择丙酸作为HV组分合成前体较适宜；通过对PHBV发酵过程曲线分析、影响PHBV发酵指标的各因素的响应面分析以及摇瓶发酵补料试验，得到了较适宜的PHBV摇瓶发酵补料条件，在此条件下，细胞干重、PHBV含量、PHBV浓度、HV组分含量和HV组分对丙酸的产率系数可分别达到27.7g/L、80.7％、22.4g/L、16.1mo1％和

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。