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硝基苯基
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  “硝基苯基)”译为未确定词的双语例句
     Studies on the Nucleophilic Reactions of 5-(4-nirophenyl)-10, 15,20-triphenylporphyrin
     5-(4-硝基苯基)-10,15,20-三苯基卟啉的亲核反应研究
短句来源
     STUDY ON RACEMIZATION OF L-threo-2-AMINO-1-(4-NITROPHEN L)-1, 3-PROPANEDIOL
     L-苏型-1-(对硝基苯基)-2-氨基-1,3-丙二醇的消旋工艺研究
短句来源
     Through spectrograms of UV,IR,MS,NMR and elementary analysis of niphensamide,the constitutional formula of niphensamide is proved to be N (4 nitrophenyl) 5 chlorosalicylylamide.
     通过UV、IR、MS、NMR光谱分析和元素分析,证实硝苯柳胺的结构式为N(4硝基苯基)5氯水杨酰胺
短句来源
     Synthesis of Chiral Phase-Transfer Catalyst from Intermediate of Chloramphenicol(L-Thereo -2-Amino-1-(4-Niophenyl)-1, 3-Propanediol)
     由氯霉素中间体L-苏型-1-(对硝基苯基)-2-氨基-1,3-丙二醇制备手性相转移催化剂
短句来源
     Two natural urea derivatives, ethyl 4 - (0 - nitrophenyl) - 3 - thio - allopllanate and ethyl 4 - (0 - nitrophenyl) - 3 - allophanate, were isolated from the leaves of rice.
     从水稻叶片中分离出两种天然脲类化合物:4-(邻硝基苯基)-3-硫代脲酸乙酯和4-(邻硝基苯基)-3-脲酸乙酯。
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  相似匹配句对
     Study on ESR Spectrum of Radical Anion of Nitrobenzene
     阴离子的ESR谱的研究
短句来源
     Preparation of 2-(4-nitrophenyl)ethanol
     2-(4-)乙醇的制备
短句来源
     2. basal cell;
     细胞;
短句来源
     Aluminium-Based Composite Material
     铝复合材料
短句来源
     Growth of N-(4-Nitrophenyl )-(L)-Prolinol Crystal and Its Structure Properties
     N-(4--(L—脯氨醇(NPP的单晶生长与结构特征
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  nitrophenyl)
4-(p-Nitrophenyl)-1H-6-R-quinolones-2 were nor reduced byEscherichia coli cells.
      
methylumbelliferyl and p-nitrophenyl sugar derivatives were determined.
      
The Michaelis constant of the elastase for N-t-Boc-L-alanine p-nitrophenyl ester is 0.10 mM; the Michaelis constant of the cathepsin G for N-benzoyl-L-tyrosine ethyl ester is 0.42 mM.
      
Catalytic properties of the enzyme in reactions with L-tryptophan and some other substrates as well as competitive inhibition by various amino acids in the reaction with S-o-nitrophenyl-L-cysteine were studied.
      
The α-N-acetylgalactosaminidase is resistant to NaCl; for p-nitrophenyl-α-N-acetyl-D-galactosaminide, the Km is 0.38 mM.
      
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This paper deals with the synthesis of 3-[o-dichloro (or monochloro-) acetamino-p-nitro-plenyl]-propanol (Ⅱ or Ⅱa),structurally varying from chloramphenicol on the one hand by shif-ting the dichloroacetamino group from the aliphatic side-chain to aromatic ring and replacing thesecondary hydroxyl group by hydrogen on the other,for the purpose of investigating the relationbetween biological action and chemical constitution of the antibiotic.The resulting compoundsshowed no inhibiting effect against E.coli,S.thphosa,S.paratyphi...

This paper deals with the synthesis of 3-[o-dichloro (or monochloro-) acetamino-p-nitro-plenyl]-propanol (Ⅱ or Ⅱa),structurally varying from chloramphenicol on the one hand by shif-ting the dichloroacetamino group from the aliphatic side-chain to aromatic ring and replacing thesecondary hydroxyl group by hydrogen on the other,for the purpose of investigating the relationbetween biological action and chemical constitution of the antibiotic.The resulting compoundsshowed no inhibiting effect against E.coli,S.thphosa,S.paratyphi A and B.staphylococcusaureus,and B.subtilis.The compounds Ⅱ and Ⅱa were prepared by a 4-step synthesis starting from o-nitrocin-namyl alcohol (Ⅵ),which upon hydrogenation in the presence of Raney-nickel catalyst led tothe formation of 3-(o-aminophenyl)-propanol (Ⅶ),m.p.65°.By nitrating the latter with amixture of HNO_3 and H_2SO_4,there was formed 3-(o-amino-p-nitrophenyl)-propyl hydrogen sul-phate (Ⅷ),m.p.203°(decomp.); which on subsequent hydrolysis with dilute mineral acidgave the desired product 3-(o-amino-p-nitrophenyl)-propanol (Ⅸ),m.p.90°.In order toestablish the orientation of the nitro group,this compound was converted into its N,O-diacetylderivative (Ⅹ),m.p.128°,which on oxidation with potassium permanganate gave the knowno-acetamino-p-nitrobenzoic acid (Ⅺ).Finally,the compounds Ⅱ,m.p.132°,and Ⅱa,m.p.118°,were obtained by chloroacetylation with an appropriate acid chloride.Direct hydrogenation of o-nitrocinnamaldehyde (Ⅻ) in the presence of Raney-nickel catalystgave rise to 1,2,3,4-tetrahydroquinoline (ⅩⅢ).

本文报告合成氯霉素相似化合物3-[隣二氯(或一氯)乙醯氨基-对硝基苯基]-丙醇。此等化合物对大肠杆菌,伤寒杆菌,副伤寒甲及乙杆菌,金色葡萄球菌及枯草杆菌等细菌均不现抑制作用。说明氯霉素分子上的二氯乙醯氨基从脂肪炼上移至芳香环的相邻位置上,以及仲醇羟基以氢代替后则原有的抗生作用即消失。

3-(o-Diehloroacetaminomethyl-p-nitrophenyl)-propanol (Ⅱ) structurally related to chloramphenicol has been prepared for the purpose of investigating the relation between biological action and chemical constitution of the antibiotic.Compound Ⅱ was prepared by a 5-step synthesis starting from 3-o-aminophenyl-propanol (Ⅲ), which upon diazotization in presence of cuprous chloride formed 3-o-eyanophenylpropanol (Ⅳ) (b. p. 140—142/2mm, its nitrobenzoate, m.p. 85—86°). The o-acetyl derivative (Ⅵ, m. p. 122—123°) of...

3-(o-Diehloroacetaminomethyl-p-nitrophenyl)-propanol (Ⅱ) structurally related to chloramphenicol has been prepared for the purpose of investigating the relation between biological action and chemical constitution of the antibiotic.Compound Ⅱ was prepared by a 5-step synthesis starting from 3-o-aminophenyl-propanol (Ⅲ), which upon diazotization in presence of cuprous chloride formed 3-o-eyanophenylpropanol (Ⅳ) (b. p. 140—142/2mm, its nitrobenzoate, m.p. 85—86°). The o-acetyl derivative (Ⅵ, m. p. 122—123°) of V was obtained first by reducing Ⅳ by means of lithium aluminium hydride to form 3-o-aminomethyl phenylpropanol (Ⅴ, sulphate, m. p. 114—115°, its dinitrobenzoate, m. p. 154—155°), and followed by selective acotylation in glacial acetic acid, saturated with hydrogen chloride gas, with the aid of acetyl chloride. Compound Ⅵ was then nitrated with mixed acid, and the nitrating product hydrolyzed with dilute hydrochloric acid to give 3-(o-aminomethyl-p-nitrophenyl)-propanol hydrochloride (Ⅶ,m. p. 207—208°) from which the desired product Ⅱ, m. p. 141—142°, was obtained by dichloroacetylation with methyl dichloroacetate.

本文叙述从3-(隣氨基苯基)-丙醇开始經过五步反应合成3-(隣二氯乙酰氨甲基-对硝基苯基)-丙醇。此化合物对結核杆菌607的抑制作用約为氯霉素的十六分之一;对葡萄球菌,大腸杆菌及枯草杆菌無显著抑制作用。

The nitration,bromination and oxidation of tetra-p-tolylsilane were studied.When nitrated.with copper nitrate and acetic anhydride at room temperature,tri-(p-methyl-m-nitrophenyl)-p-tolylsilane was obtained in nearly quantitative yield;when brominated with N-hromosuccinimide,one tolyl-silicon bond was broken,and tri-(p-bromomethylphenyl)bromosilane was obtained,which was hydrolyzedinto the corresponding silanol,and its bromomethyl group could be transformedinto aldehyde group by Sommlet reaction;when oxidized...

The nitration,bromination and oxidation of tetra-p-tolylsilane were studied.When nitrated.with copper nitrate and acetic anhydride at room temperature,tri-(p-methyl-m-nitrophenyl)-p-tolylsilane was obtained in nearly quantitative yield;when brominated with N-hromosuccinimide,one tolyl-silicon bond was broken,and tri-(p-bromomethylphenyl)bromosilane was obtained,which was hydrolyzedinto the corresponding silanol,and its bromomethyl group could be transformedinto aldehyde group by Sommlet reaction;when oxidized with chromic anhydride,a high melting tetra-(p-carboxyphenyl)silane was resulted which could be esteri-fled to ethyl ester.

本文报告四(对甲苯基)硅烷的硝化、溴化和氧化反应的结果。当用硝酸铜和醋酸酐在室温硝化时,生成三(对甲基间硝基苯基)对甲苯基硅烷,产率接近定量。当用 N-溴代丁二酰亚胺溴化时,一个甲苯基-硅键发生断裂,生成三(对溴甲苯基)溴硅烷,水解得出相应的硅醇,其中的溴甲基经 Sommlet 反应可以变成醛基。当用铬酸酐和乙酸酐氧化时,得出高熔点的四(对羧苯基)硅烷,并制成其乙酯。

 
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