丙烷

Bromopropane is produced from hydrogen bromide and propene in the presence of catalyst by free radical addition process.

丙烯与溴化氢在催化剂作用下，进行自由基加成反应生产1-溴丙烷。

Including high-purity synthetic hydrobromide, hydrogen bromide acetic acid solution, hydrogen bromide acetone \ dichloromethane solution, sodium bromide, calcium, ammonium and other inorganic bromide, Bromochloromethane second bromomethane, 1 - bromo --3 - chloropropane organic bromide.

包括高纯度合成氢溴酸、溴化氢醋酸溶液、溴化氢丙酮\二氯甲烷溶液、溴化钠、钙、铵等无机溴化物，溴氯甲烷、二溴甲烷、1-溴-3-氯丙烷等有机溴化物。

In addition to water, this study will include the following components: hydrogen sulfide, carbon dioxide, methane, ethane, and propane.

除水外，本研究还包括以下方面：硫化氢、二氧化碳、甲烷、乙烷和丙烷。

The mixture of 1, 1, 1, 3, 3-pentafluoropropane (HFC-245fa) and hydrogen fluoride has a minimum axeotrope.

1，1，1，3，3-五氟丙烷－氟化氢混合物是一种二元最低共沸物。

The first four members of the series (methane, ethane, propane, butane) are gases at ordinary temperatures; the next eleven are liquids, and form the main constituents of paraffin oil; the higher members are solids.

最前的四个烷烃化合物(甲烷、乙烷、丙烷、丁烷)在常温下为气体；接下来的十一个为液体，是构成石蜡油的主要物质；更高碳数的则为固体。

Objective To evaluate the stability of perfluorepropane-albumin microsphere injection at 2-8℃.

目的 评价全氟丙烷人血白蛋白微球注射液在2~8℃保存的稳定性。

The adducts of ethylene oxide and propylene oxide are possessed of the majority of nonionic deinking agents. They are the adducts of fatty acid and polyol and monoethanolamine.

在非离子脱墨剂中，环氧乙烷和环氧丙烷的加聚产物占了绝大部分，分别为硬脂肪酸、高碳醇和烷酰醇胺型的加成物。

The research results show for low Sn concentrations, for example 1wt%Sn with respect to Ni, the Ni/Sn surface alloy is energetically preferred. We have also used XPS to characterize the catalysts. The quantified Sn and Ni XP spectra for Ni/Sn/SLT catalysts show that Sn preferentially segregates to the surface of the Ni/Sn alloy. We demonstrate that supported Ni/Sn alloy catalyst provides significantly higher reforming reactivity and resistance to deactivation via carbon deposition than supported monometallic Ni catalyst both in steam reforming of CH4 and CO_2 dry reforming.

本文以SLT为支撑体，利用Sn对传统的Ni基催化剂进行表面合金化处理，成功制备了Ni/Sn表面合金重整催化剂，将该催化剂用于甲烷和丙烷的CO_2重整和水蒸汽重整反应，研究结果表明，在Sn浓度很低的情况下，例如1wt%Sn含量，从能量角度看更易于形成表面合金，XPS数据也显示Sn更易于富集在Ni/Sn合金催化剂表面。

Refining the Montgolfier brothers' concept, he designed the propane burner system, new envelope material, the modern light-bulb-style envelope shape we see today, a new inflation system, and many safety features.

精炼的孟格菲兄弟'的概念，他设计的丙烷燃烧器系统，新的信封材料，现代的光球式信封形状，我们今天所看到的，新的通货膨胀的系统，以及许多安全特性。

The 2 Montgolfier brothers, Joseph and Etienne, first began experimenting with paper vessels elevated by heated air, and after a couple years of experimentation they developed a hot air balloon similar in design to the ones used today, but with one major difference — they were powered by burning straw, manure and other material in an attached fire pit instead of propane.

2孟格菲兄弟，约瑟夫和Etienne，第一次开始尝试与纸张的船只通过加热空气升高，实验后，他们制定了一个热气球在设计上类似今天使用的一对夫妇年，但有一个最大的不同-他们是焚烧秸秆，粪肥和其他物质动力，而不是在一个丙烷重视跳火坑。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷