The results showed that coniferin could completely polymerize with model compound of β-O-4 type lignin to form lignin macromolecule. The M of the polymerized product was much higher than the starting materials.

研究表明：在漆酶的催化作用下木質(zhì)素前驅(qū)物松柏醇－β-D-葡萄糖苷與木質(zhì)素模型物能很完全的發(fā)生聚合，產(chǎn)物中不存在起始物的晶體射,黄色视频，M也大大的增加了欧美二区乱伦视频。

To effectively enhance the contraposition selectivity of chlorinating reaction the p-chlorotoluene was prepared by direct chlorination of toluene and chlorine gas in the presence of zeolite catalyst.

為了有效提高甲苯氯化反應(yīng)的對(duì)位選擇性，研究了在分子篩催化作用下甲苯與氯氣直接氯化制取對(duì)氯甲苯大学生粉嫩12p国产。

The adsorption of urea nitrogen onto dialdehyde cellulose under catalysis of immobilized urease in gelatin was studied in batch system.

研究了在固定化脲酶催化作用下雙醛纖維素對(duì)尿素氮的吸附平衡和動(dòng)力學(xué)制服丝袜人妻日韩在线。

Ascorbate is concomitantly oxidized to monodehydroascorbate. Some monodehydroascorbate radicals are re-reduced in a reaction catalyzed by monodehy- droascorbate reductase, but the remainder undergoes spontaneous dismutation to ascorbate and dehydroascorbate.

在抵抗氧化脅迫的反應(yīng)中，抗壞血酸自身被氧化為單脫氫抗壞血酸深夜特黄A级毛片免费视频,，一部分單脫氫抗壞血酸在單脫氫抗壞血酸還原酶的催化作用下還原為抗壞血酸可以直接在线观看黄网站免费，另一部分單脫氫抗壞血酸的在歧化作用下被不成比例地還原為抗壞血酸或氧化為脫氫抗壞血酸。

The effects of reaction parameters such as temperature, pressure, and hydrogen to hydrocarbon ratio (H2/HC) on the hydroconversion of methylcyclopentane over Pt/HZSM-5 have been investigated in a fixedbed downflow reactor.

在連續(xù)流固定床反應(yīng)裝置上99久热只有精品视频最新，考察了反應(yīng)溫度美女裸体日韩成人网站视频在线观看、壓力及氫烴摩爾比等條件對(duì)甲基環(huán)戊烷臨氫轉(zhuǎn)化反應(yīng)活性及擴(kuò)環(huán)反應(yīng)選擇性的影響；結(jié)合反應(yīng)評(píng)價(jià)結(jié)果和熱力學(xué)分析在线观看无码区，探討了Pt/HZSM-5催化作用下MCP的擴(kuò)環(huán)反應(yīng)規(guī)律免费在线观看黄片AV。

The results show that the energy barrier with the two watermolecules reaction drops about 25% compared with that of onewater molecule reaction.

冰表面對(duì)〓反應(yīng)的催化作用對(duì)〓與一水和二水的反應(yīng)進(jìn)行了計(jì)算，優(yōu)化出了絡(luò)合態(tài)及過(guò)渡態(tài)九一精品视频在线美女在线观看。

An enzyme that catalyzes the oxidation of many body compounds e.g., epinephrine and ''.

對(duì)體內(nèi)化合物的氧化有催化作用的酶（如：腎上腺素国产精品久久久精品日日、降腎上腺素、五羥色胺）欧美激情丁香综合。

In thes subject, I have analyzed the developing conditions of esculen packing inland and overseas, according to ourselves level, adopting cheap bean dregs as material, using biological zymolysis technology, biological protease and lipase as catalyzer and through the catalysis of enzyme tO make soybean fibre of bean dregs and then form new esculent packing.

本課題通過(guò)分析國(guó)內(nèi)外可食性包裝的發(fā)展?fàn)顩r6080无码吃奶在线观看视频，結(jié)合我國(guó)的實(shí)際情況，采用價(jià)格低廉的豆渣為原料国内视频在线视频自拍区，運(yùn)用生物發(fā)酵技術(shù)你懂得黄色网址，以生物蛋白酶、脂肪酶為催化劑色爽交永久免费视频，經(jīng)酶的生物催化作用提取豆渣中的膳食纖維一级aa毛片免费高潮视频2020，制成新型可食性包裝。

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具體制備工藝為：首先以L-苯丙氨酸為原料采用重氮化方法得到-2-氯-3-苯基丙酸免费色哟哟网站，再經(jīng)酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇鈉催化作用下和丙二酸二乙酯縮合99tv无码国产精品，發(fā)生SN2反應(yīng)，得到相應(yīng)的三乙酯在线观看国产爆草网站视频，然后經(jīng)水解和脫羧呦呦色色网，得到-芐基丁二酸；在實(shí)驗(yàn)中乙醇鈉要和丙二酸二乙酯充分反應(yīng)日本同步大片，避免生成肉桂酸乙酯天天色天天爽；該過(guò)程操作簡(jiǎn)單，原料便宜日韩最新无码免费动漫AV，產(chǎn)率較高www.色色.com，總收率可達(dá)到26.8%无码有码日韩制服AV。

It was found that gold nanoparticles quench the fluorescence of fluorescein sodium in water.

第五章實(shí)驗(yàn)發(fā)現(xiàn)水溶液中金納米微粒對(duì)NaBH_4還原亞甲基藍(lán)的反應(yīng)具有顯著的催化作用。