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synthesis     
相关语句
  合成
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    Study on Synthesis of Omeprazole and Pyridine Derivatives
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    Study on the Synthesis, Characterization and Application of Organophosphorous Fire-proofing Agents
    有机磷阻燃剂的合成、表征及应用研究
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    Study on the Synthesis and Properties of Hydrophobically Modified Polyacrylamides and the Interaction of it with Ionic Surfactants
    疏水缔合型聚丙烯酰胺的合成与性能及其与离子型表面活性剂的相互作用
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  制备
    Study on Catalyst's Preparation and Properties for Synthesis o-Phenylphenol
    合成邻苯基苯酚的催化剂的制备及性能研究
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    Synthesis of TiO_2-based Nano-sized Photocatalysts and Their Applications in Photocatalysis and Superhydrophilicity
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    Study on DME Synthesis over Zeolite SUZ-4
    SUZ-4分子筛上二甲醚制备的研究
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    Synthesis of 2,6-Naphthalenedicarboxylic Acid and Preparation of New Aromatic Polyamides Containing Phthalazinone
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    THE SYNTHESIS OF [8-~(14)C]-GUANINE
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  化学合成
    Study on the Chemical Synthesis Process of Poly(3-hydroxybutyrate)
    聚3-羟基丁酸酯化学合成工艺的研究
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    Synthesis of Inosine-5'-Diphosphate And Cytidine-5'-Diphosphate
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    Synthesis of lnosine-5'-Diphosphate And Cyiidine-5'-Diphosphate
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    SYNTHESIS OF GUANINE
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  合成法
    Novel Synthesis Method for AB Ring of Taxol
    紫杉醇AB环的新合成法
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  synthesis
In the early 1960s research into radar signal synthesis produced important formulas describing the action of the two-dimensional Fourier transform on auto- and crossambiguity surfaces.
      
Wavelets, generalized white noise and fractional integration: The synthesis of fractional Brownian motion
      
The Design and Synthesis of a Novel, Orally Active, Selective ETA Antagonist
      
Synthesis and Cytotoxic Activity of 6-(Substituted-Phenyl)Amino-5,8-Quinazolinediones
      
Design, Synthesis and Growth Inhibition Activity of Bis-Epoxyethyl Derivatives of Stallimycin Modified on the Amidino Moiety
      
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A detailed procedure, which is essentially a modification of Baker and Briggs' method, is described here for the synthesis of α-phenyl-β-(3,5-diiodo-4-hydroxy-phenyl)-propionic acid (Priodax). Two derivatives of Priodax, one ,being new, were also prepared. The Priodax obtained exhibits low toxicity and produces good cholecystographic shadows. An attempt was made to employ hydriodic acid and red phosphorus for the simultaneous reduction and demethylation of p-methoxy-a-phenylcinnamic acid without success....

A detailed procedure, which is essentially a modification of Baker and Briggs' method, is described here for the synthesis of α-phenyl-β-(3,5-diiodo-4-hydroxy-phenyl)-propionic acid (Priodax). Two derivatives of Priodax, one ,being new, were also prepared. The Priodax obtained exhibits low toxicity and produces good cholecystographic shadows. An attempt was made to employ hydriodic acid and red phosphorus for the simultaneous reduction and demethylation of p-methoxy-a-phenylcinnamic acid without success. How- ever, this substituted cinnamic acid can be reduced in good yield by means of sodium amalgam.

本文主要報告α-苯基-β-(3,5-二碘-4-羥苯基)-丙酸的詳細合成方法。所得產品毒性較舶來品稍低,在X射線下不透光度很大,適合臨床上胆囊造影之用。實驗過程中,曾以氫碘酸及紅磷還原對甲氧基-α-苯代肉桂酸,未獲成功。但此還原反應在鈉汞齊作用下,可以順利進行。

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。

The stoichiometry of the synthesis from CO and H_2 is studied. By performing carbon, hydrogen and oxygen balances around an overall chemical equation, a number of stoichiometric equations relating the various reaction criteria have been obtained. Two of them are given as follows: c=1/3(2-u+m+e_1+d), and K=COx(3-4c+δ). where c, m, e_1=moles of CO_2, CH_4 and C_2H_6 formed per mole of CO converted, respectively; K=volume contraction, per cent; x=CO conversion, per cent; u=H_2/CO usage ratio; CO=volume fraction...

The stoichiometry of the synthesis from CO and H_2 is studied. By performing carbon, hydrogen and oxygen balances around an overall chemical equation, a number of stoichiometric equations relating the various reaction criteria have been obtained. Two of them are given as follows: c=1/3(2-u+m+e_1+d), and K=COx(3-4c+δ). where c, m, e_1=moles of CO_2, CH_4 and C_2H_6 formed per mole of CO converted, respectively; K=volume contraction, per cent; x=CO conversion, per cent; u=H_2/CO usage ratio; CO=volume fraction of CO in synthesis gas; and d, δ=correction terms which can usually be neglected. Various applications of the deduced stoichiometric relationships are described, including methods of testing the consistency of synthesis data, a thorough discussion of the significance of reaction criteria and examples to illustrate the use of the derived equations in certain process computations and in correlation of experimental data. For the calculation of contractions, additional formulas are derived to supplement the work of Bashkirov and of Rapoport.

本文从CO+H_2合成的一个总反应式出发,进行碳、氢和氧三个元素的平衡,结合考虑了反应前後气相分子数的改变,得到一些能够说明反应的基本数量指标间关系的公式,其中较重要的有: c=1/3(2-u+m+e1+d) 及 K=CO_x(3-4c+δ). 式中c、m、e1各为以转化的CO为基数时,CO_2、CH_4、C_2H_6的生成率;K、x、μ各属反应的收缩率、CO转化率和H_2/CO消耗比;CO为原料气中一氧化碳的体积分数;d与δ属可忽略的校正项。合成实验结果表明,对同一催化剂在一定反应压力和循回比下,c几不随x而改变。因此,在原料气不变时,K与x约成正比。根擦推导出的关系式,对各反应指标的意羲及其间关系作了较确切的解释;并提供了一些检验数据准确度和快速判断反应情况的方法。从上述公式推导出来的收缩率计算式補充了,和等人的工作。最後,举例说明了元素平衡的关系式可以方便地用到某些合成工艺计算以及实验数据的初步联系上去。

 
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