In this report, half-esterification between these pendent hydroxyl groups of hydroxyl-PU and maleic anhydride could lead to new pendent groups, carboxylic groups. These highly polar carboxylic groups in the side chain of PU could play the role of internal emulsifier. They had self-dissociation ability in the water or were neutralized first by appropriate amount of base. Then, PU bearing carboxylic group could dispersed steadily in the water, named aqueous-based polyurethane dispersion.

在本論文中亚洲一区二区国产精品一区二区，利用原來(lái)親油性Hydroxyl PU主鏈段上懸掛的羥基經(jīng)由與琥珀酸酐的半酯化(Half-esterification Reaction)反應(yīng)后，使PU在側(cè)鏈上懸掛具有強(qiáng)極性的羧酸基黄片在线视频播放，其可作為聚胺酯分子中的內(nèi)乳化劑美女裸体露双乳黄a免费网站，羧酸基能在水相中自身解離產(chǎn)生離子或加入適量堿使之中合，使聚氨酯高分子能夠穩(wěn)定分散於水中免费h视频，即所謂水性PU分散液(Aqueous-based Polyurethane Dispersion)欧美暴力性爱。

Moreover, the physiochemical properties of CLA-SL were determined: color Y20R2.2, acid value 0.23mgKOH/g, peroxide value 3.15mmol/kg, iodine value 131gI/100g and saponification value 192mgKOH/g.

經(jīng)過兩級(jí)分子蒸餾后，重相酸價(jià)由98.5mgKOH/g降低至0.23mgKOH/g精品免费人成视频网站app，CLA-SL產(chǎn)品的得率為43.5%日本午夜片成年WWW，收率為91.0%。分子蒸餾CLA-SL產(chǎn)品的理化指標(biāo)：色澤Y20R2.291一区二区日本在线观看www，酸價(jià)0.23mgKOH/g黄色片视频免费，過氧化值3.15mmol/kg，碘值131gI/100g黄色毛片1级网站2000，皂化值192mgKOH/g日本A八性爱视频。

Moreover, higher degree of aromaticity of HA than that of FA was observed in pig manure compost.

而且，無(wú)論在堆肥開始還是結(jié)束欧美日韩免费粉嫩人妻视频专区，胡敏酸的芳構(gòu)化程度都明顯高于富里酸亚洲综合色图小说。

In the third step, when the ratio of racemic ester to benzenesulfonyl chloride to triethylamine to catalyst 4-DMAP is 1:1:1:0.1 in 10℃, the yield is 82.9% and high purity is obtained by crystallisation.

在第三步磺酰化反應(yīng)中国产ktv内交换配乱婬视频，得到合成消旋2-苯磺酸基-2(2-氯苯基)乙酸甲酯的較佳反應(yīng)條件為鄰氯扁桃酸甲酯：苯磺酰氯：三乙胺=1：1：1亚洲热在线观看，催化劑4-DMAP用量為摩爾反應(yīng)物的10%，反應(yīng)溫度為10℃强伦姧人妻一区二区，收率為82.9%，同時(shí)用結(jié)晶方法獲得高純度的產(chǎn)物毛片一级AB毛片一级。

ABSTRACT: In the presence of sodium t-butoxide and DMSO,ethyl 2-oxocyclopentanecarboxylate was subjected to C-alkylation with 2-(4-bromomethylphenyl)propanoic acid with high regioselectivity to give 2-［4-(1-ethoxycarbonyl-2-oxo-1-cyclopentanylmethyl)phenyl］propanoic acid (4) which was followed by hydrolysis,decarboxylation and salt formation to afford loxoprofen sodium in about 72% overall yield.

在叔丁醇鈉和二甲基亞砜的存在下国产女秘书免费视频，2-丙酸對(duì)2-乙氧羰基環(huán)戊酮進(jìn)行C-烷基化，再經(jīng)水解脫羧国产h视频在线观看免费，成鹽即得洛索洛芬鈉偷拍无码日韩丝袜视频，以2-丙酸計(jì)算，總收率為72%亚洲国产综合无码一区。

In these components, 2-methyl-1-propanol, ethyl acetate, 3-methyl-1- propanol, 2,3-butanediol, phenylethyl alcohol, butanedioic acid diethyl ester, ethyl hydrogen succinate, 2-hydroxy-ethyl propanoic acid and 4-hydroxy-benzeneethanol were main aroma components, these volatile componds provided the typical sensory style of wine.

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The esterification reaction was carried out in isooctane solvent at 50℃, with 0.15mol/L of substrate and 1:1.4 of acid-alcohol molar ratio.

研究了反應(yīng)溫度、溶劑18禁成年无码免费网站下载、底物濃度最新精品在线、底物摩爾比、吸水劑用量等因素對(duì)酯化反應(yīng)的影響69亚洲精品无码专区在线，確定了正戊酸異戊酯的最佳合成條件為：反應(yīng)溫度為50℃亚洲欧美一区二区在线啊，異辛烷為反應(yīng)介質(zhì)，底物濃度為0.15mol/L为爱搞点激情在线，酸醇摩爾比為1：1.4夜夜爽人人爽。

A process for making an electronic device which comprises applying a nonaqueous plate-resistant ink by ink jet printing to selected areas of a dielectric substrate, optionally laminated with an electrically conductive metal, exposing the plate resistant ink to actinic and/or particle beam radiation to effect polymerisation, adding one or more metal layers by electrolytic or electroless deposition, the upper layer of which is an etchresistant metal, removing the polymerised plate-resistant ink with alkali and finally removing the electrically conductive metal which are optionally directly laminated to the dielectric substrate and not protected by an upper layer of etch-resistant metal by chemical etching wherein the plate-resistant ink is substantially solvent-free and comprises: A 30 to 90 parts acrylate functional monomers free from acid groups comprising mono- or higher functionality wherein 5 to 95% by weight are mono-functional monomers; B 1 to 30 parts acrylate functional monomer containing one or more acid groups; C 0 to 20 parts polymer or prepolymer; D 0 to 20 parts radical initiator; E 0 to 5 parts colorant; F 0 to 5 parts surfactant; and where the ink has a viscosity of not greater than 30 cPs at 40 DEG C and all parts are by weight.

一種制備電子裝置的方法，所述方法包括以下步驟：通過噴墨印刷在任選層壓了一種或多種導(dǎo)電金屬的介電底材的選定區(qū)域涂覆非水的阻沉積油墨免费三级网址，將所述阻沉積油墨暴露在光化輻射和/或微粒束輻射中以完成聚合好黄的视频网站，通過電解沉積或無(wú)電沉積增加一層或多層金屬層，其中最上層的金屬層為一種或多種阻蝕刻金屬国产A级特黄的片子试看，用堿除去聚合的阻沉積油墨人人操人人看人人搞，最后通過化學(xué)蝕刻將任選直接層壓在所述介電底材上并且不被一種或多種阻蝕刻金屬的上層保護(hù)的導(dǎo)電金屬除去，其中所述阻沉積油墨基本不含溶劑伊人影院在线操在线干影院，并且包含以下組分：A30-90份不含酸基團(tuán)的丙烯酸酯功能性單體男人j放进女人P全黄在线网站，所述單體包括單官能或多官能單體，其中5-95％重量為單官能單體欧美成狂野欧美在线观看；B1-30份包含一個(gè)或多個(gè)酸基團(tuán)的丙烯酸酯功能性單體在线亚洲中文；C0-20份聚合物或預(yù)聚物；D0-20份自由基引發(fā)劑日南视频网站在线；E0-5份著色劑中文字幕在线观看视频2020；和F0-5份表面活性劑；其中所述油墨的粘度在40℃下不高于30cPs狂野欧美激情蜜桃视频网站大全，并且所有的份數(shù)以重量計(jì)亚洲天码中字一区日本。

This research utilized the method of organic synthesis, researching different amounts and positions of hydroxy-substituted benzoic acid and serotonin into amide reaction, so as to produce a series of polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10). Accordingly, this study conducts the following four tests. I. The activity of antioxidant and the experiment of ability to scavenge DPPH free radical, II. The ability of overall antioxidant—the activity of TEAC, III. The activity test of inhibit Tyrosinase, and IV. The study of absorbing UV / VIS Spectrophotometers. This study use trolox, arbutin, and octyl salicylate as the control groups, and to test the ability of anti-oxidation, the activity of inhibit Tyrosinase, and the ability of absorbing UV. This research ultimately intends to investigate the applied value of those compounds into cosmetics.

本研究主要利用有機(jī)合成的方法，將不同數(shù)量及不同位置的羥基取代苯甲酸化合物與色洛冬寧進(jìn)行醯胺化反應(yīng)后无一码黄色视频，得到一系列的多羥基取代之N-色洛冬寧苯甲醯胺衍生物（化合物1 ~ 10）欧美性爱网页，進(jìn)行四種不同活性測(cè)試方法：一、清除DPPH自由基能力抗氧化活性測(cè)試日韩国产亚洲欧美有码；二天天操狠狠干、總抗氧化能力活性測(cè)試；三黄片中文字幕视频、抑制酪胺酸酶活性美白測(cè)試亚洲小说综合；四国产一级精品A片在线播放、紫外線／可見光光譜儀吸收測(cè)試，并以水溶性維生素E国产欧美va天堂在线观看视频下载、熊果素九九6精彩视频、水楊酸辛酯當(dāng)作對(duì)照組，探討其抗氧化能力免费韩国无码黄网站、抑制酪胺酸酶的活性能力與吸收紫外線能力日本亚洲一区二区三区在线播放，再進(jìn)一步探討其應(yīng)用於化妝品上的價(jià)值。

A method which was used to determine the formula of waterborne alkyd resin was introduced based on the formula design of solvent-based alkyd resin and the specific synthetic condition.

在溶劑型醇酸樹脂配方設(shè)計(jì)的基礎(chǔ)上理论片一区，結(jié)合水性化的具體條件av人人操网站在线看，設(shè)計(jì)出一種適用于水性醇酸樹脂配方計(jì)算的方法。