Propylene epoxidation to propylene epoxide is one of the most important challenges in catalysis because this reaction possesses both industrial significance and academic importance.

中文摘要：丙烯環(huán)氧化制環(huán)氧丙烷具有重大的工業(yè)應(yīng)用背景和重要的學(xué)術(shù)意義，開拓該反應(yīng)的高效催化體系和催化劑是催化領(lǐng)域的最重要的挑戰(zhàn)之一福利免费试看。

MnO_x catalytic gauzes are analyzed using BET90人人操人人干、SEM and IR before and after treatment. The result shows that the specific surface area, total pore volume and average pore size of MnO_x reduce dramatically, and the infrared absorption band of N-O enhances. The removal mechanism of NO_2 using MnO_x catalyzer is preliminarily believed as absorption-catalysis process.

對(duì)使用前后的MnO_x催化網(wǎng)進(jìn)行線性掃描和紅外光譜分析，得到使用后催化劑比表面積欧美亚洲另类图片、總孔容和總孔面積明顯減小99思思视频，N-O鍵增多，初步分析認(rèn)為NO_2被MnO_x催化網(wǎng)去除的機(jī)理為先吸附后發(fā)生催化反應(yīng)為酸草草影院欧美一区。

Under the catalysis of ammonia, tetraethoxysilane hydrolysed and polymerized to form the silica nanoparticles.

將環(huán)己烷不卡免费黄色小视频、正己醇和表面活性劑Triton X-100按一定體積比(12.3∶1.04∶1)混合均勻，形成清澈透明的溶液看av在綫；將適量的四羧基鋁酞菁溶解到濃氨水中亚洲中久久久久久精品国产，加入到上述混合溶液中，形成反向膠束精品深夜福利视频无码精品社区。

The outstanding properties of near-critical water comparing to that of water at ambient temperature and pressure are its high ionization constant and low dielectric constant,so it possesses self-acid/base catalysis function and special solubility of organics and inorganics.

近臨界水與常溫常壓水相比其突出的性能是電離常數(shù)大和介電常數(shù)小色五月综合性，因而近臨界水自身具各酸堿催化功能和能同時(shí)溶解有機(jī)物和無機(jī)物的特性。

So far they have been synthesized with various substituted groups and cavity-size of 4-20 phenol units. Calixarenes have been utilized in fields of complexation, catalysis, extraction, ionophore and so on.

目前已經(jīng)合成出了4-20個(gè)苯酚單元所構(gòu)成的不同環(huán)腔尺寸和具有不同取代基的杯芳烴：它已在配位女人与拘性行为视频网站、催化www,3p、萃取、離子載體九九青草视频、分離材料等領(lǐng)域得到了應(yīng)用夜间福利在线看黄，在色譜中的應(yīng)用也日益受到關(guān)注。

In order to study the catalysis of iron oxide nanoparticles on the metallic fuel ,the nanoparticles of α-Fe2O3 were prepared using iron chloride as raw material and special surfactant as dispersant agent by an orthonormal test.

為了研究納米氧化鐵對(duì)金屬燃料的催化作用网站色色的，以氯化鐵為原料亚洲色图无玛一区二区在线观看，以特種表面活性劑為分散劑，通過正交試驗(yàn)制備出分散性好在线欧美一区二区、晶粒度為25。

In chapter I, We study that the catalysis of Al~(3+) on the reduction of Cr~(6+) by citrate acid, tartaric acid, oxalate acid, butyric acid, laetrile acid and malic acid at different temperatures and pH.

本論文共分三部分：第一部分：在不同的溫度和pH條件下99aaa视频，通過批式試驗(yàn)研究了Al~(3+)對(duì)檸檬酸一级a一级s爱片免免费免免高潮、酒石酸、草酸、正丁酸日韩免费在线视频、苦杏仁酸在线观看欧美、蘋果酸還原Cr~(6+)的催化作用。

Thermal decomposition, sometimes with catalysis, of a complex substance, especially the breaking of petroleum molecules into shorter molecules to extract low-boiling fractions such as gasoline .

裂化有時(shí)通過催化作用對(duì)復(fù)合物的熱分解亚洲一区二区三区在线观看视频，尤指把石油分子分解成更小的分子并提取低沸點(diǎn)的分餾部分日韩亚洲午夜在线影院，如汽油

It has become emergent to exploit new surfactants, which suit for constituting reverse micelles applied to enzymatic catalysis.

開發(fā)新型的表面活性劑，以構(gòu)建適用于酶催化反應(yīng)的反膠束體系三级片在线免费观看网站视频，已經(jīng)成為一個(gè)亟待解決的問題久久久久久精品网亚洲。

WT5BZThe catalysis of lipase in reversed micelles system s was showed in this review.

該綜述對(duì)逆膠束系統(tǒng)脂肪酶的催化作了較詳細(xì)的敘述。