The optimum reaction conditions are as follows: diphenylmethanethiol : methyl chloroacetate is 1:1.5, and the reaction carried out at 100℃ for 4 h, 2- acetamide can be carried out in the room temperature for 20 h, the yield of 2- acetamide was 76%, hydrogen dioxide: 2- acetamide is 1:1, and the reaction carried out at 60℃ for 3 h, the yield of modafinil was 79%, the total yield of reaction can be reached 48%.

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A kinetic study on the photopolymerization of MMA with benzophenone/triethylamine/mer-captan system as initiator has been carried out in the presence of oxygen.

采用二笨甲酮/三乙胺/硫醇體系作為引發(fā)劑第一页国产，在含氧條件下進(jìn)行了MMA光聚合反應(yīng)的動(dòng)力學(xué)研究色偷偷一区二区无码视频。

Water, Cyclomethicone, Glycerin, Sd Alcohol 40-B (Alcohol Denat.), Propylene Glycol, Melia Azadirachta Leaf Extract, Lecithin, Arctium Lappa Root Extract, Xylitol, Lactitol, Alpha-Glucan Oligosaccharide, Lactoferrin, Potassium Thiocyanate, Glucose Pentaacetate, Glucose Oxidase, Lactoperoxidase, Glycoproteins, Panax Ginseng Root Extract, Equisetum Arvense Extract, Hydrolyzed Milk Protein, Peg-8, Caprylyl Glycol, Sebacic Acid, Sodium Polyacrylate, Betula Alba Bark Extract, Cupressus Sempervirens Leaf Extract, Hamamelis Virginiana Extract, Avena Sativa Meal Extract, Humulus Lupulus Extract, Silk, Nylon-12, Polyacrylamide, Polymethyl Methacrylate, Butylene Glycol, Salicylic Acid, Lauryl Methacrylate/Glycol Dimethacrylate Copolymer, Tocopheryl Acetate, C13-14 Isoparaffin, Laureth-7, Triethanolamine, Xanthan Gum, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Phenoxyethanol, Chlorphenesin, Benzoic Acid, Methylparaben, Fragrance, Titanium Dioxide

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According to the compared analysis of prevention sulfur deposition during the production of high sour gas well, the key of prevent sulfur deposition and to control sulfur blocking is choose right element sulfur, carry out some research on the selection of sulfur solution, remix the triethylenetetramine, diethylenetriamine and monoethanolamine in different ratios, finally formed LJ-1 compounding which is best fit the production of north Sichuan province.

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In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

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In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

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Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.

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The absorbency changes of both thiol and vinyl functional group were monitored independently by FTIR spectrometer during vinyl silazane photopolymerizing with ethanedithiol, Based on the results,the kenitics of reaction was studied and the convertion of both thiol and vinyl functional groups were investigated.

采用傅立葉變換紅外光譜法跟蹤巰基和乙烯基吸光度的變化，跟蹤測(cè)定了光聚合反應(yīng)過程中巰基和乙烯基的轉(zhuǎn)化率亚洲国产图片大全视频，研究了乙二硫醇/乙烯基硅氮烷體系的光聚合反應(yīng)動(dòng)力學(xué)日韩一级免费黄片。

To synthesize the octreotide, Phe-Leu-Glu-Glu-Leu and C_(15)H_(31)-CO-Lys-Thr -Thr-Lys-Ser peptides, the strategies are as followings: Fmoc- group as protective group for α-NH_2; TBTU, DIEA and HOBt as coupling reagent; and ethanedithiol -phenol - thioanisole - H_2O - TFA ( 2.5:5:5:5:82.5 , V/V ) as cleaving solution.

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Gas chromatography with sample-pretreatment by solid-phase micro-extraction and with pulse flame photometric detection was applied to the determination of 6 stenchy sulfides(hydrogen sulfide,carbon disulfide,methanethiol,1,2-ethanedithiol,dimethylthioether and carbonyl sulfide) in polluted air.

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malathion：馬拉硫磷

概述 馬拉硫磷(malathion)即0,0-二甲基-S-(1,2一二乙氧基羰基乙基)二硫代 磷酸 酯,是一種高效低毒的有機(jī)磷殺蟲劑. 馬拉硫磷有強(qiáng)烈的硫醇臭,嗅覺閾為0.

aminoethyl mercaptan：氨基乙硫醇

aminoethyl cellulose | 氨基乙基纖維素 | aminoethyl mercaptan | 氨基乙硫醇 | aminoethyl pyrazine | 氨乙基吡嗪 氨乙基對(duì)二氮雜苯

thiodiphenylamine; phenothiazine：二苯并噻[口+井]

二乙醇硫醚;硫二甘醇;2,2'-硫二乙醇 thiodiglycol; thiodiethyleneglycol; 2,2'-thiodiethanol | 二苯并噻[口+井] thiodiphenylamine; phenothiazine | 乙硫醚;二乙基硫醚 thioether

dithioglycol：二硫乙二醇;乙二硫醇

二硫二乳酸 dithiodilactic acid | 二硫乙二醇;乙二硫醇 dithioglycol | 二硫氫醌;對(duì)苯二硫酚 dithiohydroquinone

tolylene glycol;hydrobenzoin：二苯[基]乙二醇

甲苯硫醇;甲硫酚 tolyl mercaptan;thiocresol | 二苯[基]乙二醇 tolylene glycol;hydrobenzoin | 稗凝黑穗病菌屬 Tolyposporium

ethanedioyl chloride; oxalyl chloride：乙二酰氯;草酰氯

乙二醇 ethanediol | 乙二酰氯;草酰氯 ethanedioyl chloride; oxalyl chloride | 二硫乙酸甲酯;乙硫羥羰酸甲酯 ethanedithioic methyl ester

tolyl mercaptan;thiocresol：甲苯硫醇;甲硫酚

甲苯硫醇;甲硫酚 tolyl mercaptan;thiocresol | 二苯[基]乙二醇 tolylene glycol;hydrobenzoin | 稗凝黑穗病菌屬 Tolyposporium

diethyl thiophosphoryl chloride：二乙基硫代磷 氯

二乙基硫代磷 氯 diethyl thiophosphoryl chloride | 二乙基硫代磷 氯 o,o-diethylthiophosphoryl chloride | 二乙烯基乙二醇 DIETHYLENE GLYCOL

ethylene undecane dicaroxylate; ethylenebrassylate：十一碳二甲酸伸乙酯

環(huán)硫乙烷;噻丙烷;硫化伸乙基 ethylene sulfide | 乙二硫醇 ethylene thioglycol | 十一碳二甲酸伸乙酯 ethylene undecane dicaroxylate; ethylenebrassylate

dimercaprol; 2,3-dimercaptopropanol：二巰丙醇;2,3-二氫硫丙醇

二蜜蠟酸甘油酯 dimelissin | 二巰丙醇;2,3-二氫硫丙醇 dimercaprol; 2,3-dimercaptopropanol | 乙二硫醇 dimercaptoethane