The calixarenes used as PTC in the fluorination of tetrachlorophthahaloyl chloride to obtain dimethyl tetrafluoroterephthalate were studied in this paper.

研究了杯芳烴在四氯對(duì)苯二甲酰氯氟化制備四氟對(duì)苯二甲酸二甲酯反應(yīng)中的相轉(zhuǎn)移催化作用黄色视频免费福利网站，發(fā)現(xiàn)以杯芳烴作相轉(zhuǎn)移催化劑使產(chǎn)品收率得到了明顯提高。

Their tribological performances were evaluated with a HQ-1 block-on-ring test rig and a four-ball machine.

一價(jià)銅鹽和鐵鹽的性能較差與一價(jià)銅鹽的歧化反應(yīng)及它們對(duì)潤(rùn)滑油氧化的催化作用有關(guān)在线观看av外国。

It was demonstrated that polyCuTAPc had a good catalytic activity on the reduction of oxygen.

實(shí)驗(yàn)發(fā)現(xiàn)聚四氨基銅酞菁對(duì)溶解氧的還原具有較好的催化作用欧美AAAAA一级黄片。

This indicated that Grignard reagent is a catalyst here.

格氏試劑在這里是作為一個(gè)強(qiáng)堿起著催化作用。

Regulation of glycolysis The main control step is that catalyzed by PFK but hexokinase and pyruvate kinase are additional control sites.

糖酵解的調(diào)節(jié)主要控制步驟是 PFK 酶的催化作用什么网站看毛片片免费观看，而己糖激酶和丙酮酸激酶則是另外的控制位點(diǎn)黄片一级无码在线嘿嘿。

LaNi〓 can be easily activated at room temperature and activated LaNi〓 possesses catalysing effect for the dissociation of H〓, which greatly reduces the energy barrier for dissociation of H〓. Hydrogen passed through LaNi〓 particles, then diffused into the crystal lattices of V、Nb and TiFe alloy and formed hydrogenate.

LaNi〓粒子在室溫下很容易活化四房播色综合久久综合网，活化后的LaNi〓具有了氫分子分解為氫原子的催化作用日韩一级A级特黄大片在线观看，降低了氫分子分解為氫原子所必須克服的勢(shì)壘，氫通過(guò)LaNi〓粒子而進(jìn)入V成年女人爽到高潮的视频免费、NbA片视屏、TiFe合金晶格中，形成金屬氫化物国产办公室视频在线播放。

CATALYTIC ACTION OF METAL IONS ESPECIALLY CERIUM ION, IN THE DECOMPOSITION OF t-BUTYL HYDROPEROXIDE

金屬離子亚洲欧美一区二区第三页，特別是鈰離子在叔-丁基過(guò)氧化氫分解中的催化作用

The density of vacant sites on the surface of support has the effect on the dispersion state, surface acidity and catalytic activity of supported niobia catalysts for condensation reaction of isobutylene and isobutyraldehyde.

本工作較深入地描述了負(fù)載型鈮氧化物催化劑表面相互作用，為深刻認(rèn)識(shí)負(fù)載型鈮氧化物催化劑酸催化作用和進(jìn)行高效固體酸催化劑的設(shè)計(jì)和制備提供了參考依據(jù)黄色视频在线的。

In order to thoroughly study the effect of mineral catalysis on the hydrocarbon generation of organic matter, the comparative experiments of whole rock and kerogen for 4 samples were completed under different temperature, respectively, by means of thermal simulating experiment in the open system.

為了深入研究礦物催化作用對(duì)有機(jī)質(zhì)產(chǎn)氣的影響国产欧美日韩永久，采用開(kāi)放體系下的熱模擬實(shí)驗(yàn)，在不同溫度下對(duì)4個(gè)樣品分別進(jìn)行了全巖和干酪根生氣對(duì)比研究亚洲欧美日韩精品视频一区。

It was shown that high optical purity lactide and crystallization in polymerization led to higher molecular weight PLA using low-toxic zinc lactate as catalyst.

結(jié)果表明国产永久免费看高清视频，合適的裂解溫度有利于合成高光學(xué)純度的丙交酯；在低毒乳酸鋅的催化作用下老师性色欧美A在线播放，高光學(xué)純度的單體以及聚合過(guò)程中的結(jié)晶都有利于制備高分子量聚乳酸亚洲综合乱伦。