羧酸酯基 的英文怎麼說
中文拼音 [suōsuānzhǐjī]
羧酸酯基
英文
carboxylate
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羧 :
名詞[化學] (羧基) carboxyl
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酸 :
酸構詞成分。
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酯 :
名詞[化學] (有機化合物的一類) ester
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A review on application of monohydrated sodium bisulfate as catalyst in synthesis of ester, such as monocarboxylic esters, dicarboxylic esters, chloroacetates, hydroxycarboxylic esters, aromatic esters and the reusability of sodium bisulfate with
摘要介紹了一水硫
酸氫鈉在催化合成
酯(如一元
羧酸酯、二元
羧酸酯、氯乙
酸酯、羥
基酸脂、芳香
酸酯)中的應用及其重復催化性能。
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Metronidazole ; amino carboxylic acid ; amino acid ; diester
-氨
基羧酸氨
基酸二
酯
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An one - pot process including direct condensation of ethyl isodehydracetate and hydrocitronellal, followed by decarboxylation, isomerization and isomer resolution, was developed for practical preparation of zr juvenile hormone analogue series with high content of effective component
以異脫氫乙
酸乙
酯與甲氧
基香茅醛直接縮合為起點,將縮合、脫
羧、異構化、 (順、反)異構體拆分等採用多步反應連續一鍋法的操作方法,成功地得到高有效含量的zr型保幼激素類似物。
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In order to find replacer for metronidazole and drug selection. some diesters or esters of acids containing nitrogen with metronidazole were designed and synthesized, which have difference in water - solubility. metronidazole was reacted with the corresponding amino or imino multi - carboxylic acid compounds in the presence of acetic anhydride or thionyl chloride or dcc. the intermediate of nitrilotriacetic acid with ac
為尋找羥乙
基甲硝唑的替代物,分別採用
酸酐法酰氯法或dcc法,將氨
基羧酸與羥乙
基甲硝唑反應,得到5個親水性不同的單
酯或二
酯,用ms譜確證了次氨
基三乙
酸與乙
酸酐反應的中間物,並對得到的
酯的
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Abstract : researches on unformaldehyde unironing finishing are summarized in this paper. functions and deficiencies of glyoralamido, water soluble heat reactive polyure thane, bishydroxyethyl - sulfoue, natural high precision chitosan, reactive organosilicon, amyloidosis epoxide, multiple carboxyl acid compound are also analyzed and compared
文摘:綜述了無甲醛免燙整理方面的研究,分析比較了乙二醛-酰胺類整理劑、水溶熱反應性聚氨
酯、雙羥乙
基碸、天然高聚物殼聚糖、反應性的有機硅、澱粉改性物、環氧類整理劑、多
羧酸化合物等無甲醛抗皺整理劑的功能以及各種整理劑存在的不足
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Cratoneuron taihangense musci : amblystegiaceae, a new species from hebei province, china
二甲
基甲酰胺二異丙
基縮醛對
羧酸酯化反應的研究
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A super acylation catalyst, 4 - dimethylamino pyridine ( dmap ), was prepared and used to synthesize cholesteryl ester compounds. four kinds of cholesteryl ester compounds such as cholesteryl p - alkoxyl benzoate, cholesteryl dicarboxylate, cholesteryl lumequeic ester and coattail - like cholesteryl ester were synthesized by acylation method and super acylation catalyst method. chemical structures and liquid crystal behaviors of the synthesized samples have been characterized by using element analysis, ftir, dsc and polarized microscopy with a hot stage
本文合成了高效酰化催化劑4 -二甲
基氨
基吡啶( 4 - dimethylaminopyridine , dmap ) ,採用酰氯化法和高效酰化催化劑法分別合成了對烷氧
基苯甲
酸膽甾醇
酯、對稱脂族二
羧酸膽甾醇
酯、烯
酸膽甾醇
酯及燕尾型膽甾醇
酯四類膽甾醇
酯衍生物,並進行了化學結構和液晶性能的表徵。
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The synthesis technology of various liquid rubbers with different active group terminated, such as hydroxyl - terminated, carboxyl - terminated, isocyanate - terminated, ami - no - terminated, mercaptan - terminated and various main chains like polybutadiene, polyurethane, polystyrene were reviewed with 23 references
摘要綜述了端羥
基、端
羧基、端異氰
酸酯基、端氨
基、端巰
基等活性端
基,以及聚丁二烯、聚氨
酯、聚苯乙烯等不同主鏈結構的液體橡膠的合成技術。
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Abstract : the title compound useful as insecticide, is synthesized from methyl 3 - ( 2 :, 2, 2trichloroethyl ) - 2, 2 - dimethylcyclopropanecarboxylate. by uniform design, the experimental condition is optimized. mathematical model is established and discussed
文摘:從3 - ( 2 , 2 , 2 -三氯乙
基) - 2 , 2 -二甲
基環丙烷
羧酸甲
酯出發制備二氯菊
酸甲
酯。應用均勻設計選擇反應優化條件,並對實驗數據建立數學模型,同時對模型進行分析。
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A study on carboxyl terminated unsaturated ployester thickened by diisocyanate compounds
異氰
酸酯增稠端
羧基不飽和聚
酯的研究
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( 3 ) volume shrinkage of composite decreases greatly with wpu increasing, even can arrive a negative number, but thermal stability is still good. ( 4 ) toughening mechanism is that : the formation of high molecular linear amino formate construct is the toughening reason ; hydroxyl - terminated pu - prepolymer and pf react to produce chemical bond effect which participate cure ; carboxyl - terminated pu - prepolymer and pf form semi - ipn which make toughened pf occur maximum
( 4 )通過紅外光譜對pf / pu共混物分子結構進行的定性分析、以及掃描電鏡對沖擊斷面形貌進行的分析,可證明聚氨
酯預聚物增韌酚醛樹脂的機理是:兩個體系都是由於高分子量的線形氨
基甲
酸酯結構而增韌;端羥
基pu與pf在共固化中產生化學鍵效應,參與pf的固化;而端
羧基pu則與pf形成半互穿網路而增韌。
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In this paper, a new class of concrete high performance water reducer ( hpwr ) was designed from chemical classification of high performance wra, working principle and unit structure model of poly - carboxylate series wra. the comb - like copolymer structure of hpwr was " carboxylic group - ether link - ester link ". the synthetic chemical materials was polyethylene glycil, acrylic acid and methyl - metacrylic acid ester
本文從高性能減水劑的化學結構、作用機理以及聚
羧酸類減水劑的單元結構模型出發,設計出國內所沒有的一類新型高性能減水劑? ? 「
羧酸?醚鍵?
酯鍵」為單元結構模型的梳型分子結構的減水劑共聚物,並確定了以聚乙二醇( peg )系列、丙烯
酸( aa ) 、甲
基丙烯
酸甲
酯( mma )為合成該類減水劑的主要化學原料。
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Effect of added methyl acrylate on the polymerization of carboxylic chloroprene emulsion
丙烯
酸甲
酯對
羧基氯丁膠乳聚合體系的影響
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The effect of carboxy methyl cellulose, high ester pectin and propy leneglucolalginate were significant, and we experienced the synergic effect of them by positive cross assay
增稠劑
羧甲
基纖維素鈉、高
酯果膠及藻
酸丙二醇
酯能夠顯著提高調
酸果奶的穩定性,並通過正交試驗進行增稠劑的復配。
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The results showed that the acidic juice - milk could preserved stablely by adding multiple stabilizer consisted of 0. 14 % high ester pectin, 0. 20 % sodium carboxy methyl cellulose, 0. 175 % propy leneglucolalginate, 0. 12 % sodium citrate
結果表明:添加0 . 14 %高
酯果膠、 0 . 20 %
羧甲
基纖維素鈉、 0 . 175 %藻
酸丙二醇
酯復合增稠劑與0 . 12 %檸檬
酸鈉,可使調
酸果奶達到良好的穩定效果。
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Peg and superfluous aa reaction by complete concatenation method, the esterify production " esterify water " and acid number were mensurated, it shows that the esterify reaction would be processed under 100 esterify temperature and with amine accelerantthe tide of esterify reaction was substantiated by ir. in the ir spectrum, the characteristic peak of hydroxy of peg and carboxyl of aa were weakened. and the ester link of peg was reinforce. the " esterify water " was increased gradually and the acid number of esterify production was debased gradually along with the extent of esterify time and the augmentation of molecular weight of peg
通過聚乙二醇與過量的丙烯
酸採用全連續法進行反應,測定
酯化產物「
酯化水」和
酸值等宏觀手段反映出在胺類促進劑、 100的
酯化溫度等條件下的
酯化進程,而利用紅外光譜( ir )分析所反映的聚乙二醇的羥
基和丙烯
酸的
羧基特徵峰減弱,而pea的
酯基特徵峰加強等特徵進一步證實了宏觀手段所表現出來的
酯化趨勢:隨著
酯化時間的延長和聚乙二醇分子量的增大,產生的「
酯化水」逐漸增加,
酯化產物的
酸值逐漸降低;從
酯化時間看,當反應時間達到300min時,
酯化物的
酸值達到最小,而從ir分析來看,
酯化物pea4的羥
基峰在300min時減弱到最小, pea23在120min時羥
基峰的表現出
酯化
基本完全。
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Synthesis of some esters of acids containing nitrogen with metronidazole
含氮
羧酸的羥乙
基甲硝唑
酯的合成
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Take removes in the water to have the slight pollutant as the goal activated charcoal surface modified direction is : the reduced surface lactone base and the carboxyl group and so on contain the oxygen functional group the content, increase activated charcoal surface sparse river characterthe modified activated charcoal in has a drink together in the water used adsorption treating processes, a weak basicity environment is good
我們研究了以濃硝
酸、次氯
酸和氨水去除水中三氯甲烷為主要目標表面改性活性炭吸附處理技術。立意方向為:減少表面內
酯基及
羧基等含氧官能團的含量,增加活性炭表面的疏水性。
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Graft copolymerization of methyl methacrylate onto carboxymethyl chitin was carried out by stirring quickly and no emulsifier, without emulsifier made the products more pure
摘要通過高速攪拌,未使用乳化劑,制備了羧甲基甲殼素和甲基丙烯酸甲酯的接枝共聚物,避免了產物中引入乳化劑雜質。