Alkylamine reaction with dialkyl cyanodithioiminocarbonate was catalyzed by quaternary ammonium salts at room temperature to yield 3-alkylamine-5-amino-1,2,4-triazole in good quality and high yields. After imidization and reaction with an α,β-unsaturated acid derivative, the reaction intermediate was hydrolyzed in the presence of a Lewis acid to obtain the target product.

烷基胺與氰基亞胺硫代二甲酯在季氨鹽催化作用下得到質量好、收率高的3-烷氨基-5-氨基-1欧美巨吊，2www.青草草在线视频，4-三氮唑，進一步經過亞胺中間體并與α亚洲日免费视频，β-不飽和酸酯作用后黄色视频污免费网站，中間產物在Lewis酸催化作用下水解得到三唑嘧啶酮。

The catalytic effect of different modified molecular si eves were studied for synthesis amyl acetate, the results indicate that SO 2- 4 /FeZSM have go od catalysis activity to esterification .The effect of the ratio of reactants, the amoun t of the catalyst and the reaction time were also investigated.

考察不同改性分子篩催化合成乙酸戊酯的催化活性精品一区二区三区色婷婷综合，結果表明：改性SO2 - 4/FeZSM對合成酯的催化作用較好日韩欧美国产综合，并討論了以該催化劑催化酯化時原料配比、催化劑用量在线免费观看高清无码黄色视频、反應時間等因素與酯化反應的關系欧美人人干。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of solvent etc.) on catalytic activity were studied. The principle of the copolymerization was investigated.

研究了催化體系組成（含氮雙齒配體的結構與用量、強酸的結構與用量一级做a爱黑人又粗又硬、銅鹽的助催化作用国内乱伦自拍视频、甲醇和酚類化合物作用等）和共聚反應條件（共聚反應的溫度與時間、溶劑種類與用量处女福利视频、苯乙烯與一氧化碳量等）對溶液共聚反應的催化活性的影響中文字幕一级黄片，探索溶液聚合反應規(guī)律。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of dilution reagent etc.) on catalytic activity were studied in detail. Also the optimum copolymerization condition was chosen.

深入考察了催化體系組成（含氮雙齒配體的結構與用量操人黄片视频免费、強酸的結構與用量人人摸人人人草、銅鹽的助催化作用、醇類與酚類化合物的作用等）和沉淀共聚反應條件（共聚反應的溫度與時間国产日本黄色网站免费观看、稀釋劑結構與用量伊人狼人在线观看、苯乙烯與一氧化碳量等）對該共聚反應的催化活性的影響，優(yōu)化共聚反應的聚合條件久久小视频黄色A片。

NO elimination reactions are much complicated in the system of NO-CO-CO2-N2 with the existence of metallic oxides. Homogeneous reaction between NO and CO, reduction of NO by the lower valued metallic oxides, direct decomposition of NO as a catalytic reaction and catalytic reaction of NO/CO may all contribute in NO elimination.

金屬氧化物存在條件下NO-CO-CO2-N2體系中老版A片免费毛片视频观看，NO去除反應較為復雜，NO/CO氣相直接反應日韩在线精品色欲视频网站、低價氧化物對NO的還原作用日韩A片一区二区视频免费看、金屬氧化物對NO分解反應的催化作用及金屬氧化物對NO/CO反應的催化作用等都可能存在。

We also found for the first time that the reaction between ketone and alcohol to ketal was catalyzed by benzamide and their derivatives, and the related mechanism is proposed. Furthermore, under the same irradiation condition, the photo-reaction of succimide with alcohol as well as the photolysis of benzene sulfonamide was also found and studied.

并首次發(fā)現在紫外光激發(fā)下91论坛达人人妻论坛申请，苯甲酰胺對酮和醇生成縮酮的反應有一定的催化作用这里久久精彩视频，進而對一系列芳酰胺類化合物作了對比實驗，發(fā)現芳酰胺類化合物均能對縮酮的生成有催化作用国产精品丰满对白在线观看，并對芳酰胺的作用機理進行了初步探討成年人在线观看的视频网页。

It has offered the information of the boiling points of the chemical compounds, and it is helpful to reutilize them after their separation by rectification. The results showed that the main compounds of the heavy cut of terpineol were longifolene and βcaryophyllene. They are from the raw material, terpinene oil.

松油醇的合成工藝方法主要有兩種：一種是一步法，即松節(jié)油在酸催化作用下直接進行水合反應生成松油醇好大好粗好硬；另一種是二步法欧美黄色一区二区三区啊A片，即松節(jié)油首先在酸催化作用下水合成萜二醇jizzjizz20，再經稀酸催化脫水生產松油醇。

The Schiff base transitional metal complexes of various structures and their metallomicelles as peroxidase models for the phenol and phenolic derivant oxidation have been investigated. Some results are obtained from the studies:(1) the Schiff base transitional metal complexes have high catalytic activity for the phenol and phenolic derivant oxidation, and the structure of the complexes has a great effect on its catalytic activity;(2)a novel kinetic mathematical model for the complexes and their metallomicelles catalyzing the phenolic derivant oxidation has been established;(3) the feasibility and mechanism for the phenolic derivant oxidation catalyzed by the metallomicelle(as the mimetic model of peroxidase)have been discussed.

研究了冠醚Schiff堿金屬配合物作為過氧化物酶的模擬模型對酚類物質氧化反應的催化作用国产合集，取得如下結果：(1)幾種冠醚Schiff堿金屬配合物對催化酚類物質氧化具有良好的催化活性99日视频这里只有精品，其中配體結構對其催化活性有較大的影響；(2)建立了金屬配合物與表面活性劑形成的金屬膠束催化酚類物質氧化反應的動力學數學模型超碰97人妻在线；(3)探討了金屬膠束模擬過氧化物酶催化酚類氧化反應的可行性及其機理二级A片视频在线。

The molecular weight of dextransucrase measured by SDS-PAGE was 170 kDa ,which was similar to the enzyme from Leuconostoc mesenteroides. The enzyme had an optimum temperature between 25and 30℃ and an optimum pH of 5.4. It was relatively stable in the range of pH 5.0 to 7.0, but the stability declined rapidly as soon as the temperature rose over 35℃.

以蔗糖為底物，酶促反應的最適溫度為25～30℃18在线观看黄片，最適pH值為5.4就去色色五月天，動力學常數Km值為10.43 mmol/L；酶活在pH 5.0～8.0較為穩(wěn)定亚洲毛片无码一区二区，在室溫（25℃）保藏4 天仍有59%的酶活力一级a一级a爰片免费啪啪外国，4℃保存7周酶活力僅下降一半，但在35℃以上失活很快国产欧美日韩免费影片在线观看；Ca2+對催化作用有較大的促進，Mg2+有微弱的促進作用国产高清在线看AV网站免费，K+對催化反應無影響特黄一区黄片，Cu2+的抑制作用最強。

It is found that NaOH exhibited significant cocatalytic action on the oxidation of o and p nitrotoluenes and had no cocatalytic action on the oxidation of m nitrotoluene, and the cocatalytic action of alkali NaOH increased as the concentrations of NaOH increased.

發(fā)現NaOH對氧氣氧化鄰日韩性色加勒比在线观看、對硝基甲苯有明顯的助催化作用日韩午夜一级毛片，且堿的助催化作用隨著NaOH濃度的增加而增加；而對氧氣氧化間硝基甲苯則沒有助催化作用男女猛烈无遮挡免费视频在线观看。

autocatalysis：自動催化作用

1.自(動)催化作用(autocatalysis) 植物同化CO2速率,很大程度上決定于光合碳還原循環(huán)的運轉狀態(tài),以及光合中間產物的數量. 暗中的葉片移至光下,最初固定CO2速率很低,需經過一個"滯后期"后才能達到光合速率的"穩(wěn)態(tài)"階段. 其原因之一,

magmatic autocatalysis：巖漿自催化作用

magmatic assimilation 巖漿同化 | magmatic autocatalysis 巖漿自催化作用 | magmatic breccia 巖漿角礫巖

catalysis：催化作用

l836年,Berzelius經過多年的化學反應過程研究后認為,催化劑提供了一種特殊的能量從而影響反應物之間的作用力,并首次命名為"催化作用"(Catalysis). 1895年,0stwald提出"催化現象的本質在于某些物質具有特別強烈的加速那些沒有它們參加時進行得很慢的反應過程的性能".

Heterogeneous Catalysis：多相催化(催化劑與反應物處于不同相如在固體和流體相界面間發(fā)生催化作用)

glass delivery tube 玻璃導管 | heterogeneous catalysis 多相催化(催化劑與反應物處于不同相如在固體和流體相界面間發(fā)生催化作用) | homogeneous catalysis 均相催化(催化劑與反應物在同相中反應)

Heterogeneous Catalysis：多相催化作用

heterogeneous body 不均勻體 | heterogeneous catalysis 多相催化作用 | heterogeneous catalyst 多相催化劑

catalyze：催化作用

catalyzator 催化劑 | catalyze 催化作用 | catalyzed reaction 催化反應

catalyses：催化作用復數

catalyses 觸媒作用 | catalyses 催化作用復數 | catalystactivatorpromoter 催化劑

catalyses：觸媒作用/催化作用 (復數)

catalysate /催化產物/ | catalyses /觸媒作用/催化作用 (復數)/ | catalysis /催化作用/

catalytical role：催化作用

catalytic role;催化作用;; | catalytical role;催化作用;; | CATARINO, Pedro Manuel;佩德羅.曼努埃爾.卡塔里諾;;

katalysis：催化作用

首次對催化現象進行總結,并給了一個新的術語"催化作用"(Katalysis)的是瑞典化學大師J.J.貝采里烏斯,這一術語,一直到今天在科學上仍然使用它. 50-60年代初,魏茨(P.B.Weisz)等提出了分子篩晶內催化和擇形催化作用. 在此順便指出,