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synthesis
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  合成
    STUDY ON SYNTHESIS AND ANTIARRHYTHMIC ACTIVITY OF DERIVATIVES OF 1,2,3,4-TETRAHYDROISOQUINOLINES AND 1-BENZYL-1,2,3,4-TETRAHYDROISOQUINOLINES
    1,2,3,4—四氢异喹啉和1—苄基—1,2,3,4—四氢异喹啉类衍生物的合成及其抗心律失常活性研究
短句来源
    STUDY ON SYNTHESIS AND ANTITUMOR ACTIVITIES OF DERIVATIVES OF PODOPHYLLOTOXIN
    鬼臼毒素衍生物的合成及其抗肿瘤活性的研究
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    The study on the mechanism of oxytocin synthesis and release modulated by morphine in the rat,and the Functional implication of GIRK
    吗啡调节大鼠催产素合成与释放的机制及GIRK在吗啡效应中作用的研究
短句来源
    Total Synthesis of Methyl Protodioscin--A Potent Agent with Anti-Tumor Activities
    具有抗癌活性天然产物methyl protodioscin的全合成
短句来源
    Studies on Natural Substances from Marine Algae: 1. Studies on Synthesis & Biological Activities of Natural Antioxidant-Martefragin A Derivatives from Alga 2. Studies on Preparation & Detection of Paralytic Shellfish Toxins-Gonyautoxins
    海藻生物活性物质研究——1.天然海藻抗氧化剂—吲哚噁唑生物碱Martefragin A衍生物的合成及其生物活性研究 2.麻痹性贝毒之膝沟藻毒素Gonyautoxins的制备及其测定方法研究
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  化学合成
    A STUDY OF THE CHEMICAL SYNTHESIS OF AF821, ITS ANTIFUNGAL ACTIVITY AND DAMAGE EFFECT TO THE ULTRASTRUCTURE OF FUNGI CELLS
    AF821的化学合成、抗真菌活性及其对真菌细胞超微结构的影响
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    Synthesis of Bharatamine via Photochemistry
    生物碱Bharatamine的光化学合成
短句来源
    CHEMICAL SYNTHESIS OF ANTIGENIC PEPTIDES FROM PROTEIN OF HEPATITIS E VIRUS (HEV) ANDTHEIR USE IN SERODIAGNOSIS OF HEV INFECTION
    戊型肝炎病毒(HEV)蛋白抗原肽的化学合成及在血清学诊断中的应用
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    Synthesis and bactericidal activities of peptide antibiotics hPAB-β
    肽抗生素hPAB-β的化学合成及其杀菌活性的初步证实
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    The synthesis of S-nitroso N-a cetylpenicillamine and preparation of sustained release tablets
    S-亚硝基-N-乙酰基-DL-青霉胺的化学合成及其缓释片的试制备
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  合成
    STUDY ON SYNTHESIS AND ANTIARRHYTHMIC ACTIVITY OF DERIVATIVES OF 1,2,3,4-TETRAHYDROISOQUINOLINES AND 1-BENZYL-1,2,3,4-TETRAHYDROISOQUINOLINES
    1,2,3,4—四氢异喹啉和1—苄基—1,2,3,4—四氢异喹啉类衍生物的合成及其抗心律失常活性研究
短句来源
    STUDY ON SYNTHESIS AND ANTITUMOR ACTIVITIES OF DERIVATIVES OF PODOPHYLLOTOXIN
    鬼臼毒素衍生物的合成及其抗肿瘤活性的研究
短句来源
    The study on the mechanism of oxytocin synthesis and release modulated by morphine in the rat,and the Functional implication of GIRK
    吗啡调节大鼠催产素合成与释放的机制及GIRK在吗啡效应中作用的研究
短句来源
    Total Synthesis of Methyl Protodioscin--A Potent Agent with Anti-Tumor Activities
    具有抗癌活性天然产物methyl protodioscin的全合成
短句来源
    Studies on Natural Substances from Marine Algae: 1. Studies on Synthesis & Biological Activities of Natural Antioxidant-Martefragin A Derivatives from Alga 2. Studies on Preparation & Detection of Paralytic Shellfish Toxins-Gonyautoxins
    海藻生物活性物质研究——1.天然海藻抗氧化剂—吲哚噁唑生物碱Martefragin A衍生物的合成及其生物活性研究 2.麻痹性贝毒之膝沟藻毒素Gonyautoxins的制备及其测定方法研究
短句来源
更多       
  “synthesis”译为未确定词的双语例句
    4-Amino-piperidine Library: Studies on Synthesis and Activities of Blockers for N-type Calcium Channel
    4-氨基哌啶类N型钙离子通道阻断剂组合库的研究
短句来源
    The Effect of Latanoprost Free Acid on CTGF and Collagen Synthesis in Human Tenon Fibroblast
    拉坦前列素酸对人Tenon囊成纤维细胞CTGF和胶原合成的影响
短句来源
    Effects of Sodium Nitroprusside on LTC_4 Synthesis Enzymes and LTC_4 during the Early Phase of Hepatic Ischemia-reperfusion Injury in Rats
    硝普钠对大鼠肝脏缺血再灌注损伤早期微粒体白三烯C_4合成酶系及产物LTC_4的影响
短句来源
    BIOLOGICAL SYNTHESIS OF L-ASCORBIC ACID THE OXIDATION OF L-GULONO-γ-LACTONE AND L-GALACTONO-γ-LACTONE TO L-ASCORBIC ACID
    L-抗壤血酸之生物合成L-古罗糖酸-γ-内酯及L-半乳糖酸-γ-内酯之氧化
短句来源
    STUDIES ON N,N-DIMETHYLCARBAMATES AS INSECTISIDES Ⅰ. THE SYNTHESIS OF PHENYL AND NAPHTHYL N,N-DIMETHYLCARBAMATES AND THEIR CHLORO-ANALOGUES
    N,N-二甲氨基甲酸酯类杀虫剂的研究 Ⅰ.N,N-二甲氨基甲酸苯酯、萘酯及其氯衍生物的研究
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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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Methods of synthesis and the properties of ammonium antimonylgluconate are reported. Addition of a solution of antimony trichloride in conc. aqueous gluconic acid to conc. ammonium hydroxide gave the said drug. It can also be prepared by the interaction of antimony triethoxide and ammonium gluconate. The antimony content of the product can be varied over wide limits (up to, say, 50% Sb), being dictated by the choice of the relative amounts of starting materials. Ammonium antimonylgluconate is readily soluble...

Methods of synthesis and the properties of ammonium antimonylgluconate are reported. Addition of a solution of antimony trichloride in conc. aqueous gluconic acid to conc. ammonium hydroxide gave the said drug. It can also be prepared by the interaction of antimony triethoxide and ammonium gluconate. The antimony content of the product can be varied over wide limits (up to, say, 50% Sb), being dictated by the choice of the relative amounts of starting materials. Ammonium antimonylgluconate is readily soluble in water, practically insoluble in alcohol. Its aqueous solution is unstable towards heat, acids and bases. Direct titration of the untreated sample with iodine has been found unsuccessful, since the rate of oxidation of trivalent antimony to its pentavalent state is slow enough to give rise to shifting end points, presumably due to some protective action on the part of the gluconic acid residue. This behavior is to be contrasted with that of potassium antimonyltartrate (tartar emetic), where oxidation of antimony with iodine occurs instantaneously.

1.葡萄糖酸锑铵可由三氯化锑及葡萄糖酸的浓溶液,与浓氨水作用而得.亦可用亚锑酸乙酯及葡萄糖酸铵制备.在操作上以前法较简便.成品的含锑量可因锑化剂用量的多寡而不同。2.葡萄糖酸锑铵极易溶于水,水溶液加热或遇酸、鹼时均不稳定。水溶液与碘作用时,锑的氧化(由三价至五价)速度较慢,不能直接滴定,这一点和酒石酸锑钾(吐酒石)不同,后者可以直接用碘滴定,不必经过破坏。

The preparation of p-nitroethylbenzene,an important raw material for synthesis of chloramphenicol,from o-nitroethylbenzene has been described.o-Nitroethylbenzene was reduced to o-aminothylbenzene by iron power in the presence of a little cata- lyst such as hydrochloric acid,ammonium chloride,calcium chloride,or sodium hydrogeh sulphate in a yield of about 90%.The o-aminoethylbenzene was then nitrated to give the p-nitro-o-aminoethylbenzene,m.p.61-63°,its sulphate,m.p.170, which was converted to p-nitroethlbenzene...

The preparation of p-nitroethylbenzene,an important raw material for synthesis of chloramphenicol,from o-nitroethylbenzene has been described.o-Nitroethylbenzene was reduced to o-aminothylbenzene by iron power in the presence of a little cata- lyst such as hydrochloric acid,ammonium chloride,calcium chloride,or sodium hydrogeh sulphate in a yield of about 90%.The o-aminoethylbenzene was then nitrated to give the p-nitro-o-aminoethylbenzene,m.p.61-63°,its sulphate,m.p.170, which was converted to p-nitroethlbenzene by diazotization and followed by treat- ment with ethyl alcohol.p-Nitroethylbenzene could also be prepared by combining the nitration and diazotization process in one step without the isolation of the nitra- ting product in a yield of about 60%.

1.试验了邻硝基乙苯用铁屑及不同的接触剂存在下还原,产量约90%左右。2.直接硝化邻氨基乙苯获得对硝基邻氨基乙苯,收率60%左右。3.将对硝基邻氨基乙苯重氮化后从乙醇处理获得对硝基乙苯。或直接将邻氨基乙苯硝化及重氮化去氨基连续处理以获得对硝基乙苯,产量约60%。

Cyanide catalysed dehydrohalogenation of chloral (probably chloral methanolate) by a suspension of anhydrous sodium carbonate in methanol was exploited as the simplest way for a one step synthesis of methyl dichloracetate. Chloral (1 mol.) was dropped as rapidly as possible into a suspension of anhydrous sodium carbonate (0.52 mol.) in methanol (110 ml.) containing 4 per cent its weight of potassium cyanide (5.9 g) when an energetic reaction set in almost instantly. The temperature of the reaction was...

Cyanide catalysed dehydrohalogenation of chloral (probably chloral methanolate) by a suspension of anhydrous sodium carbonate in methanol was exploited as the simplest way for a one step synthesis of methyl dichloracetate. Chloral (1 mol.) was dropped as rapidly as possible into a suspension of anhydrous sodium carbonate (0.52 mol.) in methanol (110 ml.) containing 4 per cent its weight of potassium cyanide (5.9 g) when an energetic reaction set in almost instantly. The temperature of the reaction was kept at 60-64°. By finishing the reaction off in within about half an hour's time then cooled rapidly down to 20°, the oily ester layer was separated, washed with water, dried and fractionated. A yield of over 70% theory was obtained. However, hydrolytic fission of chloral into chloroform was shown to be competitive, when the concentration of cyanide ion present was reduced. Since equally good results could be obtained by first forming chloral methanolate, and then adding it to anhydrous sodium carbonate in methanol containing potassium cyanide;and since the reaction was rapid,and decomposition of chloral methanolate into chloral and methanol seemed improbable under the experimental conditions used, a new explanation of the mechanism of reaction was suggested as following:

研究了应用氰化物为接触剂,使三氯乙醛(可能是其加成物,三氯乙醛缩甲醇)与无水碳酸钠在甲醇中的混悬液作用脱氯化氢,一步生成二氯乙酸甲酯。反应温度60—64℃;三氯乙醛滴加速度必须尽可能地快,使整个反应在半小时内结束;加水分出油层;洗滌,干燥,分馏。收率能达到70%以上。但当反应液中氰化物浓度减低时,三氯乙醛水解分裂生成氯仿的趋势即逐渐增加。由于,当先将三氯乙醛与部分甲醇制成三氯乙醛缩甲醇,然后再加到无水碳酸钠和含有氰化钾的甲醇中反应时,结果也同样地好;同时由于,这个反应速度很快,而在反应所用条件下三氯乙醛缩甲醇分解释出游离三氯乙醛的可能性极小;我们提出了反应机制的新解释。

 
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