CA-CTSs including N,O-carboxymethyl chitosan,N,O-1-carboxyethyl chitosan (N,O-1-CEC),N,O-2-carboxyethyl chltosan(N,O-2-CEC),N-carboxymethyl chitosan and N-1-carboxyethyl chitosan(N-1-CEC) are quaternized using active quaternary salts prepared in laboratory.5 series including 25 kinds amphoteric chitosans characterized with polymeric ampholyte,in which 24 kinds are synthesized firstly,are obtained, 2-Hydroxypropyl dimethylbenzyl ammonium N,O-(1-carboxyethyl) chitosan chloride (GDMBA-N,O-1-CEC) is hydrolyzed into serial low molecular weight GDMBA-N, O-1-CEC with acid as catalyst and microwave as assistant instrumentality innovately.

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When n/n=0, the product is the mixture of h-WO3 (hexagonal system WO3) and WO3.1/3H2O, and have a morphology of nanorods; when n/n=0.5 or n/n=l, the product is γ-WO3, and have a morphology of rectangular flakes; when n/n=2, the product is β-WO3, with the same morphology of rectangular flakes.

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This work, concentrated on the asymmetric allylation of aldehydes controlled by different chiral auxiliaries prepared from rotational pure tartaric acid, can be divided into three parts.The first part aims to review the developments of chiral drugs and asymmetric synthesis, from which derived the present research topic backgrounds and works.Synthesis and applications of allylation from aldehydes are the second part of the thesis. By optimizing the reaction conditions, such as solvents, temperature, time and chiral auxiliaries like N,N\'-dibenzyl tartamide, N,N\'-p-dimethylphenyl tartamide, N,N\'-o-dimethylphenyl tartamide, N,N\'-o-dichlorophenyl tartamide, N,N\'-a-dinaphyl tartamide, N,N\'-dicyclohexyl tartamide and N,N\'-diphenyl tartamide, ideal experimenttal conditions are obtained according to HPLC monitoring, as well as the auxiliaries\' recoveries experiments. Starting from benzaldehyde and 3-bromopropaldehyde, N,N\'-dibenzyl tartamide is considered the best auxiliary in this reaction.

本文介紹了醛的不對稱烯丙基化反應(yīng)，以光學(xué)純酒石酸為原料日韩视频一区，研究了不同構(gòu)型手性配體在醛的烯丙基化反應(yīng)中的立體選擇性欧美性XXXXX极品视频，全文共分三部分十個章節(jié)：第一部分對當(dāng)前手性藥物和手性技術(shù)進(jìn)行了概述，并由此展開了本文的研究背景和任務(wù)无码播放；第二部分為有機(jī)合成部分亚洲精品地址一地址二，對醛的不對稱烯丙基化反應(yīng)進(jìn)行了深入探討，以苯甲醛為原料對反應(yīng)條件進(jìn)行優(yōu)化，在優(yōu)化的反應(yīng)條件下對制備的七種可回收手性酰胺配體(N-芐基酒石酸二酰胺自拍视频日韩在线视频观看网站免费、N-對甲苯基酒石酸二酰胺18禁三级黄色网站、N-鄰甲苯基酒石酸二酰胺、N-鄰氯苯基酒石酸二酰胺亚洲中文字幕三级在线网络、N-a-萘基酒石酸二酰胺精品日韩手机版视频在线观看免费、N-環(huán)己基酒石酸二酰胺和N-苯基酒石酸二酰胺)進(jìn)行篩選，優(yōu)化配體回收實驗條件欧美欧美日韩视频二区，最終確定出N-芐基酒石酸二酰胺在苯甲醛的不對稱烯丙基化反應(yīng)中具有較大優(yōu)越性人妖专区综合无码第一页，結(jié)晶回收的手性配體光學(xué)純度保持不變。

And to make the product be easy of purification, the excess of amine was reduced to 50% from 150%. Then the diiodoalkane reacted with dialkylmethylamine into diquaternary ammonium iodide, and obtained three diquaternary compounds whose spacer groups were -(CH2)6-, N,N"-dimethyl- N,N,N",N"-tetraoctyl-1,6-hexane diammonium diiodide, N,N"-dimethyl-N,N,N",N"-tetradecyl-1,6-hexane diammonium diiodide, N,N"-dimethyl-N,N,N",N-tetradodecyl -1,6-hexane diammonium diiodide.

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Dibutyltin maleate,dioctyltin maleate,N-phenyl maleimide, N-(p-chlorophenyl) maleimide,N-(p-nitrophenyl) maleimide with unsaturated groups were synthesized using dibutyltin oxide,dioctyltin oxide,maleic anhydride, aniline,p-chloroaniline,p-nitroaniline as raw materials,respectively.Then dibutyltin male,ate/styrene bipolymer,dibutyltin maleate/styrene/methyl acrylate terpolymer,dibutyltin maleate/styrene/N-phenyl maleimide terpolymer ,dibutyltin maleate/styrene/N-(p-chlorophenyl) maleimide terpolymer ,dibutyltin maleate/styrene/N-(p-nitrophenyl) maleimide terpolymer ,dioctyltin maleate/styrene biopolymer,dioctyltin maleate/styrene/methyl acrylate terpolymer,dioctyltin maleate/styrene/ N-phenyl maleimide terpolymer,dioctyltin maleate/styrene/ N-(p-ehlorophenyl) maleimide terpolymer[P(DOTM/St/NC1PMI)],dioctyltin maleate/styrene/N-(p-nitrophenyl) maleimide terpolymerwere synthesized using DBTO,DOTO,PMI,N-p-ClPMI,N-p-NOPMI,styrene and methyl acrylate as monomers,respectively.

再以DBTO，DOTO久久久精品久久久，PMI欧美嘿咻嘿咻在线视频，N-p-ClPMI，N-p-NOPMI黑人性爱黄片，苯乙烯一级性爱在线看，丙烯酸甲酯等為單體，合成了馬來酸二丁基錫/苯乙烯二元共聚物{P}美女狂摸尿口动态图GIF，馬來酸二丁基錫/苯乙烯/丙烯酸甲酯三元共聚物{P}，馬來酸二丁基錫/苯乙烯/N-苯基馬來酰亞胺三元共聚物{P(DBTM/St/NPMI)}免费看到女人爽到高潮的视频，馬來酸二丁基錫/苯乙烯/N-對氯苯基馬來酰亞胺三元共聚物{P(DBTM/St/NClPMI)}黄色网站秒播视频，馬來酸二丁基錫/苯乙烯/N-對硝基苯基馬來酰亞胺三元共聚物{P(DBTM/St/NNOPMI)}，馬來酸二辛基錫/苯乙烯二元共聚物{P}，馬來酸二辛基錫/苯乙烯/丙烯酸甲酯三元共聚物{P}美国免费黄色大片，馬來酸二辛基錫/苯乙烯/N-苯基馬來酰亞胺三元共聚物{P(DOTM/St/NPMI)}一本久道综合在线无码视频，馬來酸二辛基錫/苯乙烯/N-對氯苯基馬來酰亞胺三元共聚物{P(DOTM/St/NClPMI)}，馬來酸二辛基錫/苯乙烯/N-對硝基苯基馬來酰亞胺三元共聚物{P(DOTM/St/NNOPMI)}麻豆日韩一级黄片。

Three novel hemicyanine derivatives,-N-(4-sulfopropyl)-4-[2-(4- N, N-diethylaminophenyl)-ethenyl]pyridinium,-N-(4-suMbbutyl)- 4-[2-(4-N, N-diethylaminophenyl)ethenyl]pyridinium (EPS4), and-N-(4- su)fobutyl-4-[2-(4-N, N-diethylaminophenyl)ethenyl]quinolinium (EQS4) with different length of alkyl chains between the adsorbing group (RSO3-) and the chromophore group, were synthesized and their photophysical and photoelectrochemical properties were studied.

設(shè)計合成了具有不同空間位阻的吡啶鹽類和喹啉鹽類半菁染料-N-(4—磺酸根丙基)-4-[2-4（4-N精品视频在线影院，N-二乙基氨基苯基）乙烯基]吡啶鎓鹽，-N-4-磺酸根丁基）-4-[2-(4-N亚洲毛片无码一区二区三区，N-二乙氨基苯基）乙烯基]吡啶鎓鹽（EPS4）和-N-（4-磺酸根丁基）-4-2-（4-NJizz美女18，N-二乙基氨基苯基）喹啉鎓鹽（EQS4），研究了它們的光物理性質(zhì)亚洲欧美日韩人人涩涩日日，并將它們用作TiO2納米晶電極的光敏化劑引入光電化學(xué)電池中日韩无码激情免费网站视频。

The increased amount of non--exchangeable NH4^＋-N during the incubation indicated as the following tendency, namely, Eum-Orthic Anthrosols 〉 Los - Orthic Entisols 〉 Hap-Ustic Isohumisols 〉 Ust-Sandiic Entisols. Organic material influenced significantly the increased amount of non-exchangeable NH4^＋-N （P was 0.0002, 0.0004 and 0.0003 when incubated at 20 d, 50 d and 60 d, respectively）. NH4^＋-N increased remarkably when Stlpa bungeana and Medicago sativa were added compared with no addition. The contents of non-exchangeable NH4^＋-N increased significantly when added （NH4）2SO4 compared without addition at 20 d, 40 d and 60d of incubation and P was 0.0037, 0.0033 and 0.0027, respectively. It was the result that the NH4^＋-N from （NH4）2 SO4 was fixed within the soil. The increased amount of non-exchangeable NH4^＋-N increased significantly for different soils, on which different vegetation types grew before the collection of soil samples, when incubated at 20 d （P=0.0434）, but not significantly at 40 d and 60d （P=0.7378 and 0.5375）. The increased amount of non-exchangeable NH4^＋-N in the soil, on which crop straw and nitrogen fertilizer had been incorporated for a long-term period, was larger than that of no addition, but it was not significantly different among these two fertilization models. Soil clay, total N and organic matter were positively correlated remarkably with the contents of non-exchangeable NH4^＋-N, the increased amount of non-exchangeable NH4^＋-N had no correlation with soil clay, whereas it had significantly positive correlation with total N and organic matter.

培養(yǎng)期間非交換性NH4^＋-N的增加量均表現(xiàn)為以土墊旱耕人為土最大，其次是黃土正常新成土91免费偷拍视频网站，簡育干潤均腐土和干濕砂質(zhì)新成土較行园谙吖劭础；添加有機(jī)物料極顯著影響培養(yǎng)期間的非交換性NH4^＋-N增加量（培養(yǎng)20d国产AⅤ熟女乱视频、40d和60d時P分別為0.0002AV三级毛片网址，0.004和0.0003），表現(xiàn)為紫花苜蓿和長芒草土壤非交換性NH4^＋-N的增加量均極顯著高于不添加有機(jī)物料的對照土壤亚洲色图国产专区；在培養(yǎng)20d波多性爱视频、40d和60d時，加（NH4）2SO4土樣非交換性NH4^＋-N的增加量顯著大于不加（NH4）2SO4土樣（戶分別為0.0037免费A级毛片无卡免费视频，0.0033和0.0027）国产高潮白浆调教福利在线视频，這是土壤對（NH4）2SO4中NH4^＋-N固定的必然結(jié)果；不同植被類型土壤培養(yǎng)20d時的非交換性NH4^＋-N增加量差異顯著（P=0.0434）国产www性性，培養(yǎng)40d和60d時差異不顯著（p分別為0.7378和0.5375）永久无毒在线观看你懂的；長期秸稈和氮肥配施土壤非交換性NH4^＋-N增加量大于不施肥對照土壤，但差異不顯著土壤黏粒欧美一级男女插穴视频、全氮和有機(jī)質(zhì)與培養(yǎng)0d能看的黄色网站福利、20d、40d和60d時土壤的非交換性NH4^＋-N含量均呈極顯著正相關(guān)天天操天天操三级；而非交換性NH4^＋-N的增加量與粘粒無相關(guān)性欧美体内she精高潮，但與全氛和有機(jī)質(zhì)呈顯著正相關(guān)。

Four hemicyanine derivatives,-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylamino-phenyl) etheny1] pyridinium (P1),-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylaminophenyl)-1,3-buteny1] pyridinium (P2),-N-(4-sulfobutyl)-4-2-(4-N,N-dimethylaminophenyl) ethenyll quinolinium (Q1) and-N-(4-sulfobutyl)-4-

合成了具有不同共軛鏈長度的吡啶鹽類及喹啉鹽類半菁染料-N-（4-磺酸丁基）-4-[2-4-N网黄网址免费，N-二甲基氨基苯基）乙烯基]吡啶鎓鹽(P1www.madouav、-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）丁二烯基]吡啶鎓鹽(P2国产精品一区二区视色、-N-（4-磺酸丁基）-4-[2-(4-N劲爆欧美中文字幕精品视频，N-二甲基氨基苯基)乙烯基]哇琳鎓鹽(Q1)以及-N-（4-磺酸丁基）-4-[2-4-N国产免费吃奶摸下视频在线观看，N-二甲基氨基苯基丁二烯基]喹啉鎓鹽(Q2)。研究了它們的光物理性質(zhì)免费看黃色片，并將它們用作TiO2納米晶電極的光敏化劑引入光電化學(xué)電池欧洲一区视频在线观看。

Three cationic surfactants, N -dodecyl- N -(2-hydroxyethyl)- N , N -dimethylammonium bromide, N -tetradecyl- N -(2-hydroxyethyl)- N , N -dimethylammonium bromide and N -cetyl- N -(2-hydroxyethyl)- N , N - dimethylammonium bromide have been synthesized.

合成了 N -十二烷基- N -(2-羥乙基)- N ， N -二甲基溴化銨美女裸体污视频、 N -十四烷基- N -(2-羥乙基)- N 三级片手机在线视频， N -二甲基溴化銨和 N -十六烷基- N -(2-羥乙基)- N ， N -二甲基溴化銨等3個季銨鹽陽離子表面活性劑熟女一级毛片。

The calculated results show that azido in azides has linear structure , the most optimized CaN6 has linear structure , and the most optimized (CaN6)n (n=2～5) clusters have chain structure of perpendicularity of approximate diamond composed by two azido with two Ca atoms . The middle N atoms of azido show positive, the N atoms at both ends of azido show negative, and the N atoms effected with Ca atoms directly show more negative . There is strong ionic bond between the Ca and N atoms. The IR spectra of the most optimized (CaN6)n (n=1～5) clusters have four vibrational sections , the whole strongest vibrational peak lies in 2195～2280cm-1,and the vibrational mode is anti-symmetric stretching vibration of N-N bonds in azido . Stability analysis show that (CaN6)3 and (CaN6)5 clusters are more stable than other clusters .

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