查询词典 reaction

Hydroxyl octanoic acid(1) was synthesized from heptaldehyde by a four-step reaction of nucleophilic substitution,displacement reaction,acid hydrolysis and deaminization.

以正庚醛为原料，经过亲核取代、置换反应、酸水解及碱化脱氨等4步反应合成了制备3，6-二己基-1，4-二氧杂-2，5-二酮的中间体——α-羟基辛酸(1)；1经对甲苯磺酸催化脱水得辛交酯。

By combining with the author's own research work, the progresses of study on sperm egg identification, acrosomal reaction, cortical reaction, and formation of male and female pronucleus in decapod crustacean are reviewed in the paper.

结合作者近期的研究工作，从精卵识别、顶体反应、皮层反应、雌雄原核的形成和结合等方面综述了近年来十足类甲壳动物受精细胞学方面的研究成果，并展望了这一领域的研究与应用前景。

In addition, some aryl-substituted propenoic acids were prepared via Perkin reaction. The cyclization and decarboxylation reaction were studied.

此外，通过Perkin反应合成了4种芳基取代丙烯酸，研究了其关环和脱羧反应。

Some extensive and thorough researches on the behavior of reaction have been carried out by some famous researchers, but the mechanism of decarburization reaction is not clear up to now.

美国一些著名学者对此课题曾作了广泛和深入的研究，但对其作用机理仍不十分清楚。

Radioactive decay studies have found a kinds of elements can be α or β decay and the decay into another element, while the α-decay product of -α-rays became one of the deep structure of the material means of .1911, the Rutherford and others bombarded atoms with α-rays observed wide-angle deflection to determine the nuclear structure of atoms and nuclei was first proposed the term .1919 year, Rutherford and others have also found that with α-ray bombardment of nitrogen will release the nuclear protons, this is the first time Artificial realization of a nuclear reaction, after the bombardment of nuclei with the radiation caused by nuclear reaction method to become the primary means of research in nuclear.

放射性衰变研究发现了一种元素可以通过α衰变或β衰变而变成另外一种元素，而α衰变的产物——α射线又成了人们探讨物质深层结构的手段。1911年，卢瑟福等人用α射线轰击原子、观察到大角度偏折，从而确定了原子的有核结构，并首次提出原子核这一名词。1919年，卢瑟福等人又发现用α射线轰击氮核会放出质子，这是首次用人工实现的核反应，以后用射线轰击原子核来引起核反应的方法逐渐成为研究原子核的主要手段。

Furthermore, innovation is a reaction to changes in the environment, and decentralization enables faster reaction.

此外，创新是对环境变化的一种反应，而权力下放更会加速这种反应。

The main contents of precursors reaction in Si23H24- Zircon 4 surface of the atomic layer deposition dechlorination reaction mechanism.

研究的主要内容有前体反应物ZrCl4在Si23H24-4 表面的原子层淀积的反应过程中脱氯机理。

From this model, the effects of such factors as reaction temperature, reaction time, concentration of HCl, particle size of CaO on dechlorination characteristics were studied.

建立了CaO-HCl脱氯反应的未反应收缩核动力学模型，通过模型计算分析了反应温度、反应时间、HCl气体的浓度和CaO粒径对脱氯特性的影响。

The results showed that the preoxidation of PPESK was a free radicals reaction,which was initiated by the decomposition of proton in aromatic ring and sulfone functional group and the removal of H_2O and SO_2.When the preoxidation temperature was above 460℃,the radical reaction was initiated by the decomposition of ketone functional group and the removal of CO_2.At last,the three-demensional cross-linking structure containing polyaromatic ether and biphenyl was formed.

研究表明，PPESK的预氧化过程是一个自由基反应过程，始终伴随着芳香环质子和砜基官能团的脱除引发的自由基交联反应，脱出H_2O与SO_2；当预氧化温度超过460℃后，随着反应的进行，由羰基官能团分解引发的自由基交联反应开始发生，脱出CO_2，并最终形成了含有大量聚芳醚和联苯结构的稳定的三维空间网状结构，进而完成PPESK由热塑性材料向热固性材料的转化。

The results showed that the decompound ratio of molybdenum disulfide and ratio of sulfur fixation could reach 99.5% and 92% respectively when the reactant ratio n(MnO_2)/n(MoS_2) was 3, reaction temperature was 450℃ and 550℃, reaction time was all 2h, and air flow was 15-20ml/min. The calcine were leached by sulfuric acid when the temperature was 30℃, and the leaching ratio of molybdenum and manganese could reach 99% and 92% respectively.

结果表明，将辉钼矿(MoS_2)和二氧化锰(MnO_2)按摩尔比1：3的比例混合均匀，在管式炉中依次在温度为450℃和550℃下分别焙烧2小时，鼓风量为15-20ml/min，此条件下MoS_2的分解率可达99.5%以上，固硫率可以达92%。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新