查询词典 sulfureted hydrogen

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

Objective To investigate the protective effect and mechanism of erythropoietin on injury of human retinal pigment epithelial cell induced by hydrogen peroxide (H2O2). Methods Take subcultured hFRPE cells as study target.

目的 观察促红细胞生成素对人视网膜色素上皮细胞抗过氧化氢（H2O2）损伤的影响。

The hydrogen bonding and π-π interactions between the chiral stationary phase and the polar group of racemates may be responsible for the chiral recognition.

手性固定相与外消旋样品上的极性基团之间的氢键作用和π-π作用可能是进行手性识别的主要原因。

Successful ethylene ignition and sustained main stream combustion is achieved with normal fuel injection and taking hydrogen as pilot flame.

采用从壁面垂直主流喷射燃料和以氢作为先锋火焰，实现了乙烯燃料的可靠点火和稳定燃烧。

Experimental investigations on the combustion process of a liquid hydrocarbon fuel ed scramjet, ignited by hydrogen pilot flame, and with four different inlets, were conducted in free-jet tests, which simulated the fly conditions of Ma=6 and H=25km.

在模拟飞行马赫数Ma=6，高度25km条件的液体碳氢燃料超燃冲压发动机自由射流试验中，对比研究了4种不同进气道，不同燃烧室入口条件下模型发动机的点火与燃烧性能。

Experimental investigations on the combustion process of a liquid hydrocarbon fueled scramjet, ignited by hydrogen pilot flame, and with four different inlets, were conducted in free-jet tests, which simulated the fly conditions of Ma=6 and H=25km.

在模拟飞行马赫数Ma=6，高度25km条件的液体碳氢燃料超燃冲压发动机自由射流试验中，对比研究了4种不同进气道，不同燃烧室入口条件下模型发动机的点火与燃烧性能。

The effect of addition of calix [4] pyrrole on the retention of anions and amino acids is consistent with the hydrogen interaction abilities of calix [4] pyrroles with analytes.

首次将杯[4]吡咯用作CE的电解质添加剂，对卤素阴离子及氨基酸的分离作了初步探讨，杯[4]吡咯对分析物保留的影响程度与它和各分析物形成氢键能力的大小顺序一致。

The binding of different halide anions to four strapped calix[4]pyrroles was studied by means of molecular mechanics and molecular dynamics simulations methods. The results indicate that the anion binding ability of calix[4]pyrrole-type systems could be effectively tuned by modifying the length and nature of the bridging straps. In this process, it was the most stable conformation upon anion binding due to the formation of four NH\|halide hydrogen bond, simultaneity, the difference of cavity by modifying straps adapted themselves to different halide anion.

模拟结果表明，加入带状修饰链和调节链长可以增强对某种特殊卤素阴离子的识别，在这个过程中，卤素阴离子与杯[4]吡咯NH上的氢形成的多氢键使主体分子与阴离子形成稳定复合物，同时带状修饰链通过改变杯吡咯空腔大小影响主体分子与卤素阴离子的氢键相互作用，从而调节了对不同阴离子的识别能力。

In this paper, a turbostratic CN precursor was prepared by means of pyrolysis of melamine, then it was treated by high temperature and high pressure. The pyrolysis process of melamine, mechanism of hydrogen elimination and the effect of catalysts on pyrolysis of melamine were studied. The crystal structures, bonding states and chemical compositions of CN precursor obtained by pyrolyzing melamine are analyzed by X ray diffraction, burning spectrum, scanning elecron microscope and Fourier transform infrared Spectroscopy.

本文采用三聚氰胺热解法制备了乱层石墨结构的碳氮前驱物并进行了探索性的高温高压实验；研究了三聚氰胺热解的工艺、去氢机理以及催化剂对三聚氰胺热解过程的影响规律；借助 X 射线衍射、燃烧谱、透射电镜和红外光谱等手段，对获得的碳氮前驱物进行了成分、晶体结构、价键结构的分析。

The protostar develops into a full-fledged star powered by thermonuclear fusion of hydrogen and other light elements in its core.

原恒星在热核聚变的作用下最终成为一颗完全发育的恒星。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。