查询词典 dioxide

Carbon dioxide would increase to 500 ppm or more.

二氧化碳含量将增加到500ppm 乃至更多。

The heats of adsorption of propanol, oxygen, and carbon dioxide were determine by the pulse method.

用脉冲法测定了丙醇、氧及CO2的吸附热，其数值与正交法的计算值一致。

The heats of adsorption of propanol, oxygen and carbcn dioxide were determined by the pulse method.

用脉冲法测定了丙醇、氧及CO_2的吸附热，其数值与正交法的计算值一致。

We prepared the pyrethric acid II through four reactions: esterification, oxidation, decomposition, diesterification. And the original synthesis route of the pyrethric acidII was improved: the yield of oxidation of allyl rise through increasing the activity of Selenium dioxide; in the document, tert-butyl-trans -2, 2-dimethy1-3-(2"-methoxycarbony1-1"-propenyl)cyclopropanecarboxy late was synthesized from tert-butyl-trans-2,2-dimethyl-3-(2 -formyl-r -propenyl) cyclopropanecarboxylate with two steps, with low yield.

我们经过酯化，氧化，成双酯，热分解四步反应，成功地得到了第二菊酸，并改进了原第二菊酸的合成路线：通过改变二氧化硒的活性提高了烯丙甲基的氧化产率；将原路线中醛氧化成羧酸、羧酸酯化的两步反应改为醛和甲醇、二氧化锰等作用一步直接酯化的方法，减少了反应步骤，提高了总收率。

At last, the catalytic mechanism of cycloaddition of propylene oxide with carbon dioxide is discussed.

论文最后对该催化剂在完成环加成反应过程中的催化机理进行了初步探讨。

The substitution of oxygen for carbon dioxide in the atmosphere, which occurred in the Proterozoic, caused probably by cyanobacteria in the form of stromatolites, caused changes leading to the evolution of aerobic organisms.

发生在原生代的大气中氧气取代二氧化碳，可能是由藻青菌在叠层结构上造成的；大气改变引发的变化，导致了好氧生物的发展进化。

However, data on efficient PSA separation of carbon dioxide with a suitable adsorbent in the literature is scarce.

然而，和文学的一个适当的吸附剂的在二氧化碳的有效率 PSA 分流上的数据是难得的。

Except in the pulmonary vein venous blood is rich in carbon dioxide and poor in oxygen.

除了在肺静脉，静脉血中二氧化碳含量多而氧气含量少。

In putrefaction the evolved materials may contain carbon dioxide, but the characteristic odors are hydrogen sulfide and sulfur-containing protein decomposition products.

在腐败过程中，放出的物质中可能含有二氧化碳，但其特征气味是硫化氢和含硫蛋白质的分解产物。

Fermentation processes usually do not evolve putrid odors. and carbon dioxide is usually produced.

发酵过程通常不放出腐烂的气味，而且通常产生二氧化碳。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。