It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

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In the precence of the base catalyst KF/Al2O3, the one - pot reaction of 2 -hydroxybenzaldehyde or 2 - hydroxynaphthaldehyde with ethyl α- bromoacetate,α-bromoacetophenone , 1,4 - dichloromethylbenzene , 4,4'- dichloromethylbiphenyl and 1,5 -dichloromethylnaphthalene gave the benzofuran compounds in 38-89% yield.

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The main products are: HH-01 fungicides HH-02 organic dispersant HH-03 cationic starch Wood HH-04 cationic starch Department HH-05 modified starch warp sizing agents also sell German Baker Chemical Co., Ltd. Main Products Defoamer series product: E640, T50 Surface Sizing Agent: A281, A288, K532, pesticides / medicine / veterinary medicine a variety of intermediate products (p-Bromo-p-Bromotoluene bromoform 1 - bromo-heptane triethyl citrate 1,2, 3 - Three Bromopropane 3 - chloro -4 - fluoro bromobenzene Bromotoluene ethylbenzene 4 - bromo -2 - bromo-ethyl-Chloroaniline 2 - bromo--5 - chloro-toluene 3 - bromo-methyl 1,6 C - Dibromo Hexane 1 - bromo -4 - nitrobenzene o-methoxy benzaldehyde acid propyl bromide p-fluorotoluene bromo dodecane toluene four of iodine bromide bromoethane three citric acid tert-butane n-butyl 2 - bromo-p-bromo-butane Hydroxybenzaldehyde between 2 - bromo-propionic acid bromide veratryl aldehyde inter-bromo-trifluoro-n-hexane of toluene on Bromoxynil Bromotoluene toluene ethylbenzene o-bromophenol bromide bromide Cyclohexane Cyclopentane bran acid dibutyl maleate Ethyl Lactate Propylene between bromine bromine bromine between aniline o-anisidine o-fluorophenol difluorobenzonitrile to aminobenzaldehyde Bromotoluene aniline on Bromobenzaldehyde Bromotoluene acid) and other relevant units have been in substantial promotion, and client set up a good relationship of cooperation has been the user's praise.

現(xiàn)主要產(chǎn)品：HH—01殺菌劑 HH—02有機分散劑HH—03陽離子淀粉 HH—04木署陽離子淀粉 HH—05 經(jīng)紗上漿變性淀粉同時還代理銷售德國貝克化學(xué)公司系列產(chǎn)品主要產(chǎn)品消泡劑：E640 亚洲网在线、T50 表面施膠劑：A281、A288 一级a毛片水多视频国产一、K532草久草网，農(nóng)藥/醫(yī)藥/獸藥中間體多種產(chǎn)品(對溴苯酚對溴甲苯溴仿 1-溴庚烷檸檬酸三乙酯 1，2欧美色图亚洲色图在线，3-三溴丙烷 3-氯-4-氟溴苯對溴乙苯 4-溴-2-氯苯胺溴乙酸乙酯 2-溴-5-氯甲苯 3-溴丙酸甲酯 1www,五月天,com，6-二溴己烷 1-溴-4-硝基苯鄰甲氧基苯甲醛溴乙酸丙酯對氟甲苯溴代十二烷對碘甲苯四溴乙烷溴代叔丁烷檸檬酸三丁酯 2-溴氯苯間羥基苯甲醛溴丁烷 2-溴丙酸黎蘆醛溴已烷間溴三氟甲苯對溴苯腈對溴乙苯鄰溴甲苯溴代環(huán)已烷溴代環(huán)戊烷糠溴酸馬來酸二丁酯溴丙烯乳酸乙酯間溴苯胺間溴苯甲醚鄰氟苯酚鄰氟苯腈對氨基苯甲醛對溴苯胺對溴苯甲醛對溴苯甲酸)等在相關(guān)單位得到了大量推廣，與客戶建立了良好的合作關(guān)系香港经典a毛片久久免费观看2，得到了用戶的贊譽欧美性交片视频。

Reductive dechlorination of chlorinated Endocrine Disrupting Chemicals in Water by metallic catalytic reduction was studied for further understanding the application of palladiumized iron-scrap bimetallic catalytic reduction technology in treating high molecular weight and structure complicated refractory chlorinated organic pollutans, especially, the reductive dechlorination reaction of the three chlorinated EDCs: 2,4-dichlorophenoxyacetic acid(2,4-D), Hexachlorocyclohexane, and chlordane.

通過研究水體中有機氯類環(huán)境內(nèi)分泌干擾物在金屬催化還原體系中的還原脫氯反應(yīng)，考察了鐵屑鍍鈀雙金屬催化還原技術(shù)在處理水體中大分子量復(fù)雜結(jié)構(gòu)的難降解氯代有機污染物的應(yīng)用先锋久久中文，著重研究了水體中2国产色福利影院，4-二氯苯氧乙酸(2，4-D)爱爱视频在哪里考、六六六和氯丹三種有機氯類環(huán)境內(nèi)分泌干擾物在Pd/Fe催化還原體系中的還原脫氯行為天堂视频网站。

The best disinfection methods should be selected to achieve tetter water quality in biological stability and DPBs, Chloramination (chlorine to ammonia by 3:1) results less DBPs and AOC formation (HAAs by 90%, THMs by 70%, AOC by 10% respctively).

氯胺消毒在對消毒副產(chǎn)物鹵乙酸和三鹵甲烷以及 AOC 的影響方面均優(yōu)于氯消毒，特別是消毒副產(chǎn)物黑人一级婬片A片免费无码，采用氯氨比3： l 比例時鹵乙酸下降約90％jizzg，三鹵甲烷下降70％，對提高飲用水水質(zhì)有很好的作用古装观看一级古装A片。

Results show that, by using thionyl chloride and N,N-dimethyl formamide as chlorinating reagent and dichloromethane as solvent and taking -15℃ as reaction temperature, Z-iomer crystals with pale white color and stable to temperature can be obtained with an overall yield of 70%.

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Our main products category has chloride (pivaloyl chloride, acetyl chloride, Propionyl chloride, methyl acryloyl chloride, butyl chloride, 2 - furyl chloride already chloride, acryloyl chloride, is amyl chloride, etc.) and acids (positive acid, pivalate, propionate, acetic acid, methyl acrylate, 2 - furoic acid, etc.) and so on dozens of products.

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Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane ,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

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Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;2. Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane, trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用靜電紡絲法制備聚酯納米纖維欧美性免费，選擇苯酚和四氯乙烷黄色在线网站视频，三氟乙酸，三氟乙酸和二氯甲烷3種溶劑分別溶解PET切片進行靜電紡絲A性视频AAA，通過掃描電子顯微鏡對纖維表面形態(tài)進行觀察日韩精品视频热线在线观看，結(jié)果表明：三氟乙酸和二氯甲烷混合溶劑溶解PET制備的電紡纖維較好。

Purified sucralose-6-acetate which had been recrystallized was hydrolyzed in th system of sodium methoxide/methanol solution, and the mixture was quenched with H+ ion exchange resin, and cake was washed with methanol. The eluate was concentrated to remove methanol and methyl acetate. The aqueous solution was decoloured with active carbon. The filtrate solution was concentrated and crystallized above 38℃for sever hours, the product sucralose was collected.

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