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two carbonyl
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  两个羰基
     The results indicate that hydrogen bond interaction and relative orientation of the two carbonyl g roups play an important role in the sta-bility of pyruvic acid rotamers.
     研究发现,氢键相互作用及两个羰基的相对空间取向在丙酮酸异构体的稳定性中起着重要的作用.
短句来源
  “two carbonyl”译为未确定词的双语例句
     carbamide, uramine and two carbonyl compound, by this reaction we gain a series of 2,4,6-three substitute pyrimidine. We gain tweney-two compound in all.
     以β-二酮类化合物为起始原料分别与脒、脲、胍反应,得到了一系列2,4,6-三取代基嘧啶,并以之为原料进行衍生化反应,共合成了22个嘧啶类化合物。
短句来源
     Then we tried to modify the amino group to form (R)-(+)-N-(9-anthracenyl) -3-isothiocyanatopyrrolidinedione, but this compound is still very inconstancy, and difficultly to purificate due to the existance of two carbonyl groups.
     因此我们后来将目标分子调整为(R卜(+)一N一(9一葱基关3-异硫氰基一2,5一毗咯二酮。该化合物由于两个拨基的存在性质非常活泼,分离提纯非常困难。关键词:手性,荧光试剂,合成,葱,叮陡
短句来源
     Since there is no carbonyl peak in the IR and NV spectra of SA/FA blend LB films, it is suggested that each Cd2+ in the LB film may be coordinated with two carbonyl groups, as shown below:where R and R' stand for main chains of SA of FA respectively. The quantitative analysis of ESCA results has also supported above coordinated model.
     采用IR、UV和ESCA对LB膜的结构进行了表征,表明所制备的LB膜具有高度的均匀性,在每一层单分子膜中,两种羰基以与Cd~(+2)成络合物形式存在。
短句来源
     A 2,4-dinitrophenyl-hydrazine derivative was designed and synthesized,in view of the characteristics of curcumin molecule structure, containing two carbonyl groups. Its structure was confirmed by IR,~1H NMR and elemental analysis.
     鉴于天然活性物质姜黄素分子结构含有2个C=O的特点,采用常规方法,经结构修饰合成了姜黄素2,4-二硝基苯肼衍生物,其结构经IR,1H NMR和元素分析确证。
短句来源
  相似匹配句对
     Two.
     二、末日意识
短句来源
     Two.
     二.
短句来源
     The Tc-carbonyl complexes of tryptophan and histidine were synthesized by two-step method.
     采用两步法合成了色氨酸及组氨酸的羰基锝配合物。
短句来源
     The two branches on both sides of the carbonyl bridge are in conjugative competition for the carbonyl group.
     羰桥两边两个分支对羰桥的共轭作用是互相竞争的,当共轭竞争的优势从一分支转移到另一分支时,同系直线就分为斜率不同的两段,其间出现转折点。
短句来源
     NICKEL CARBONYL POISONING
     羰基镍中毒
短句来源
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  two carbonyl
These two carbonyl-containing compounds are the main carbonyl products of metal-catalyzed oxidation of proteins, accounting for 55-100% of the total carbonyl value.
      
Two carbonyl groups, one axial the other equatorial, complete the coordination sphere of the cobalt atom bound to phosphorus.
      
Two carbonyl ligands in the resulting spin adducts were replaced by PPh3.
      
The presence of two carbonyl groups as substituents in furans and thiophenes results in reduction of the sorption energy of the latter, which is known as ?negative? α-effect.
      
Some palladium(I) carbonyl tetranuclear complexes were synthesized, which, based on the IR spectral and x-ray structure analysis data, contain two long and two short Pd-Pd bonds with two carbonyl and two carboxylate bridges.
      
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In this investigation, the action of a tertiary amine, 2-methyl-3-(β-diethylaminoethyl) indole with hydrogen peroxide has been described. The results are as follows. (1) 3% Hydrogen peroxide had no apparent effect on the compound. (2) By using 10% hydrogen peroxide a compound with the empirical formula C_(15)H_(24)O_3N_2, m.p. 129° (dec), had been isolated; the structure of which was proposed as 2-methyl-3-(β-diethylaminoethyl)-2:3-dihydroxy-dihydroindole oxide (III), on the assumption that the amine oxide was...

In this investigation, the action of a tertiary amine, 2-methyl-3-(β-diethylaminoethyl) indole with hydrogen peroxide has been described. The results are as follows. (1) 3% Hydrogen peroxide had no apparent effect on the compound. (2) By using 10% hydrogen peroxide a compound with the empirical formula C_(15)H_(24)O_3N_2, m.p. 129° (dec), had been isolated; the structure of which was proposed as 2-methyl-3-(β-diethylaminoethyl)-2:3-dihydroxy-dihydroindole oxide (III), on the assumption that the amine oxide was first formed, whilst simultaneous oxidation of the 2:3 double bond of the indole nucleus to two hydroxyl groups was also taken place. (3) By using hydrogen peroxide of concentration higher than 15%, a compound with empirical formula C_(11)H_(11)O_3N, m.p. 126—127°, had been isolated; the structure of which was proposed as o-acetamidophenyl-epoxyvinyl ketone (IV), on the assumption that at first the oxidation of the 2:3 double bord of the indole nucleus to two carbonyl groups occurred, and then cleavage took place between the amine oxide N and 2-methylindolylethyl moiety to form a β-ketoaldehyde, which isomerized to (IV) eventually. Another evidence was that the compound (IV) formed a mono-phenylhydrazone, m.p. 226—227°.The conclusions drawn here are: (1) in an amine oxide with one group attached to the tertiary nitrogen atom different from the other two, the cleavage takes place between the nitrogen and the heavier group; (2) a 2:3 disubstituted indole nucleus can be oxidized at the 2:3 double bond to two carbonyl groups by hydrogen peroxide probably through the dihydroxy stage.

1.用15%过氧化氢溶液与2-甲基-3-(β-二乙胺乙基)吲哚(即一种氮原子上有不全相同的基团的叔胺)相作用,其分裂处系氮与重量较大的基团连接的键上。因而获得隣-乙酰胺苯-氧乙烯酮,并制得其单苯腙。 2.吲(口朶)核2:3位置的双键可以过氧化氢氧化为两个酮基,并可能系从双羟基化合物而来。

The 1H, 13C-NMR spectra in the solutions and IR spectra in solid state of seven 6-hydroxy-2-pyridone derivatives are reported. It is demonstrated by experiments that the compounds studied can not exist in the form of 6-keto-2-pyridone at normal temperature and under acidic conditions. The two carbonyl bands in the range of 1 686- 1 630 cm-1 in IR spectra for some samples are explained. The possible structures for these compounds under acidic, neutral and basic conditions are proposed according to the spectral...

The 1H, 13C-NMR spectra in the solutions and IR spectra in solid state of seven 6-hydroxy-2-pyridone derivatives are reported. It is demonstrated by experiments that the compounds studied can not exist in the form of 6-keto-2-pyridone at normal temperature and under acidic conditions. The two carbonyl bands in the range of 1 686- 1 630 cm-1 in IR spectra for some samples are explained. The possible structures for these compounds under acidic, neutral and basic conditions are proposed according to the spectral data.

报道了 7个6-羟基-2-吡啶酮衍生物在溶液中的 1H-.13C-NMR波谱和固态的红外光谱数据.实验表明,在常温和酸性介质中井不能使它们以 6-酮基-2-吡啶酮的结构存在.解释了红外光谱中1886—1630 cm-1范围内某些化合物的两条羰基谱带.根据波谱数据,提出了这类化合物在酸性、中性和碱性条件下可能存在的结构形式.

An oxygen-enriching composite membrane is prepared by depositiong stearic acid (SA) and H-(CF2)10-COOH (FA)blend monolayers on the surface of porous polypropylene membrane, using LB (Langmuir-Blodgett) technique. The structure of composite mem- branes is characterized by IR,UV,SAXD,EXCA and so on. From the good linear relationship of IR absorbances with the number of deposited monolayers of SA/FA blend films, it is known that the typical and excellent Y-type LB film can be prepared.Since there is no carbonyl...

An oxygen-enriching composite membrane is prepared by depositiong stearic acid (SA) and H-(CF2)10-COOH (FA)blend monolayers on the surface of porous polypropylene membrane, using LB (Langmuir-Blodgett) technique. The structure of composite mem- branes is characterized by IR,UV,SAXD,EXCA and so on. From the good linear relationship of IR absorbances with the number of deposited monolayers of SA/FA blend films, it is known that the typical and excellent Y-type LB film can be prepared.Since there is no carbonyl peak in the IR and NV spectra of SA/FA blend LB films, it is suggested that each Cd2+ in the LB film may be coordinated with two carbonyl groups, as shown below:where R and R' stand for main chains of SA of FA respectively. The quantitative analysis of ESCA results has also supported above coordinated model. From the measurement of long space by the small angle x-ray diffraction (SADX), we can calculate the thickness of SA (or SA/FA blend) LB monolayer which is about 25. 4 A. this result is consistent with the theoretical length of SA molecules and also proves that the monolayers are typical Y-type LB films.It is shown that the separation factor (αo/n)increased rapidly while the permeability (J) decreased a little with increasing number of deposited monolayers. When the thickness of composite membrane is only about 304 A (12 monolayers), the good oxygen enrichment performance has already been gotten, e.g. αo/n-2. 6, Jo2 = 1. 01×10-2 cm3 (STP)/cm2. sec. cmHg.

本文研究了全氟代十一酸(FA)与硬脂酸(SA)共混物在气—水界面上的单分子膜性质,制备了其Langmuir—Blodgett(LB)膜。小角X光衍射测得LB膜单分子层的厚度为2.54nm左右。采用IR、UV和ESCA对LB膜的结构进行了表征,表明所制备的LB膜具有高度的均匀性,在每一层单分子膜中,两种羰基以与Cd~(+2)成络合物形式存在。以聚丙烯微孔膜为支撑膜,FA/SA共混LB膜为亲氧的功能膜,研究了其组成、结构与富氧性能之间的关系。对于十二层复合富氧膜,其功能层厚度仅为30nm左右,其氧/氮分离因子达2.6,氧气的透过率为1.01×10~(-2)cm~3(STP)/cm~2·Sec·cmHg,已具有工业应用价值。

 
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