The uniform nano-sized titanic oxide mesoporous thin film which can be coated repeatedly was prepared by adding tetrahydrofuran which acts as dispersant to micro-emulsion system consisting of water,cyclohexane,hexadecyl trimethyl ammonium bromide and butyl alcohol.

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These conditions included original material source, reagent ratio, base solutions, power of the microwave, reaction time and so on.2, Chitosan obtained from above was modified by Schiff base type macrocycles, which was prepared by the reaction of the reagents of salicylaldehyde, glacial acetic acid, hydrobromic acid, chloroepoxy propane and the others.

反應(yīng)的最優(yōu)化條件為：物料比1：25；反應(yīng)時(shí)間20min在线观看你懂的网站免费不卡；NaOH溶液濃度為50%亚洲男人综合天堂；微波功率為450w。 2国产欧美日韩一区二区、利用原料水楊醛av网页在线、氫溴酸、冰醋酸等采用四步法合成了含羥基的Schiff堿型大環(huán)化合物久操中文视频，然后以取代方法將此Schiff堿型大環(huán)化合物負(fù)載到殼聚糖上可以直接看的A片，得到具有特殊結(jié)構(gòu)與性能的殼聚糖衍生物，并得到各中間產(chǎn)物的紅外光譜圖国产主播第一页。

Ab initio and density functional theory (B3LYP) in G98 were employed to study the following four direct aldol reactions between acetone and isobutyraldehyde or 3,3-dimethylbutyric aldehyde or benzaldehyde or 4-bromo-phenyl aldehyde catalyzed by-proline .

中文摘要：本文采用G98程序包中的從頭計(jì)算方法和密度泛函方法計(jì)算研究了-脯氨酸催化丙酮與異丁醛91专区亚洲、3，3-二甲基丁醛美女福利国产精品免费观看、苯甲醛及對(duì)溴苯甲醛的不對(duì)稱直接羥醛縮合反應(yīng)亚洲精品ty久久久久久久久久，共計(jì)四個(gè)反應(yīng)體系。

Objective To study the counteraction of l-tetrahydropalmatine (1-THP) against bromocriptine-induced hypoprolactin in lactational rats and to prove that l-THP is an antagonist of dopamine D2 receptors.

目的 研究左旋四氫巴馬汀(l-tetrahyoropalmatine女人被叉视频， l-THP)對(duì)溴隱亭(Bromocriptin外国特级毛片www， Bro)誘導(dǎo)的哺乳期大鼠催乳素(Prolactin， PRL)水平低下的拮抗作用免费一级黄色，以證實(shí)其為中樞多巴胺能D2受體抗劑黄黄免费视频看。

For the first time, enantiomers of C2-symmetric 1,1 -spirobiindane-7,7'-diol were resolved with crude menthyl chloroformate by phase-transfer catalysis in the presence of tetrabutylammonium bromide. The reaction was carried out at 0℃-rt. The diastereomers of SPINOL bis-menthyl carbonate can be separated by simple crystallization using alcohol. The hydrolysis of the diastereomers was carried out via aqueous NaOH/EtOH solution.

首次通過相轉(zhuǎn)移催化的方法對(duì)螺雙二氫茚二酚進(jìn)行了有效的拆分，用L--氯甲酸薄荷醇酯做拆分劑日韩视频日韩精品视频在线观看，以四丁基溴化銨為催化劑在0℃-室溫下進(jìn)行酯化反應(yīng)生成非對(duì)映體衍生物奶头又大又白喷奶水av，以乙醇作溶劑，通過重結(jié)晶的方法分離衍生物www.av性爱，在水-乙醇混合溶劑條件下色色婷婷网，用強(qiáng)堿NaOH或KOH分別水解，制得相應(yīng)的光學(xué)純度大于99%ee的兩個(gè)異構(gòu)體SPINOL黑屌性爱视频，其中總收率：--SPINOLwww.日韩，78.2%；--SPINOL18禁黄无遮挡网站免费-百度，80.6%亚洲另类中文字幕。

That 1,4-addition reactions of Grignard agent made from 1-bromo-3-triphenylmethoxyl-1-octene and organozinc agent made from 1-iodo-3-trimethysiloxy-1-octene with 2-(6-methoxylcarbonylhexyl)-4-(2- tetrahydro-pyranyloxy)-2-cyclopentenone both gave prostaglandin 〓 methyl ester statethat prostaglandin E compounds can be prepared by 1,4-addition reaction oforganozinc agent.

最后，研究了溴化-3-三苯甲氧基-1-辛烯基鎂和碘化-3-三甲硅氧基-1-辛烯基鋅與2-(6-甲氧羰己基)-4-(2-四氫吡喃氧基)-2-環(huán)戊烯酮通過1，4-加成反應(yīng)合成〓甲酯的方法亚洲综合无码精品一区二区三区，結(jié)果表明精品精品国产高清A级毛片3d，用有機(jī)鋅試劑通過1，4-加成反應(yīng)來合成PGE類化合物是可行的国产盗摄在线精品福利。

This investigation was prepared MCM-41 catalyst films on silicon wafer in ammonia media, using tetraethyl orthosilicate as a precursor and cetyltrimethylammonium bromide as a surfactant.

中文摘要本研究以四乙基氧矽溶液為矽酸鹽的來源美女被草逼一级A片视频，溴化十六烷基三甲基銨鹽為界面活性劑，在氨水的環(huán)境下思思热国产精品视频，制備MCM-41觸媒薄膜於矽晶片上日韩久久性欲片。

Benzyl phenylacetate was synthesized by benzyl chloride with the salt prepared by phenylacetic acid and Na2CO3 under microwave irradiation and in presence of phase transfer catalyst without any organic solvent and inorganic carrier.

采用微波輻射相轉(zhuǎn)移催化技術(shù)，以四丁基溴化銨為相轉(zhuǎn)移催化劑学生妹人人操人人干人人，先將苯乙酸與碳酸鈉成鹽91日韩一区，在無有機(jī)溶劑和無機(jī)載體的條件下與氯化芐直接酯化合成苯乙酸芐酯。

The effect of components including tetracholrophthalic acid, phthalazine and antifoggant with tribromomethyl sulfone groups on photographic properties of FTG materials was investigated in different pH, using polyvinyl alcohol as a hydrophilic binder, in situ formed AgBr as light sensitive component.

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Fourthly, The preparation of 1 -triazolyl-2-isoxazolinyl substituted-ethenes was developed through an one-pot 1, 3-dipolar cycloaddition of NaN_3 and RI,α-alkylation reaction of substituted allyl bromides and 1, 3-dipolar cycloaddition of nitrile oxidesbased on polystyrene-supported propargyl selenide.

四熟女91拍、從聚苯乙烯負(fù)載的炔丙基硒醚出發(fā)，通過與疊氮化鈉和碘化物的一鍋法1在线看黄AV性爱，3-偶極環(huán)加成反應(yīng)亚洲人人操人人操、取代烯丙基溴的α-烷基化反應(yīng)和腈氧化物的1，3-偶極環(huán)加成反應(yīng)固相合成了1—三唑—2—異噁唑啉取代的-乙烯国产aaaa黄片。