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rapid
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  “rapid”译为未确定词的双语例句
    RAPID DISSOLUTION METHOD OF CARBOXYMETHYLCELLULOSE SODIUM
    羧甲基纤维素钠速溶方法探讨
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    Rapid effects of corticosterone and bovine serum albumin-conjugated corticosterone on the release of vasopressin
    Rapid effects of corticosterone and bovine serum albumin-conjugated corticosterone on the release of vasopressin
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    CONCLUSION HPLC-ECD is rapid ,simple, accurate and sensitive to determine propofol concentration in plasma. It is suitable for monitoring propofol and pharmacokinetic study.
    结论HPLC-ECD测定血浆丙泊酚浓度,方法较简便、准确,灵敏度高,重现性好,适用于临床丙泊酚血药浓度监测及药动学研究。
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    METHODS A sensitive and rapid HPLC method was developed to determine the rat plasma concentration.
    方法采用地西泮(Diazepam)为内标的HPLC 测定方法,测定SD大鼠静脉注射多烯紫杉醇后血浆中多烯紫杉醇浓度。
    The quantitative limit for cilostazol was 10μg·L-1. The method is simple, rapid, and reproducible for the determination of cilostazol in renal tissue.
    最低检测限为10μg·L-1。
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  rapid
The use of time-frequency methods (phase space methods) allows the use of rough symbols of ultra-rapid growth in place of smooth symbols in the standard classes.
      
The pharmaceutical sciences are advancing rapidly in the post-genomic era of the 21st century with the completion of the human genome, as well as those of many other organisms including bacteria and parasites, and the rapid advances in proteomics.
      
The α-isomer exhibited rapid and significantly higher peak plasma concentrations in all the species post intramuscular administrations, while β-isomer showed prolonged plasma levels.
      
This suggests that the rapid initial reduction in percent parasitemia may be due to α- isomer and the activity is maintained by the β- isomer.
      
Flavonoid antioxidants act as scavengers of free radicals by rapid donation of a hydrogen atom.
      
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In agreement with the results of Morell,DPN has been found to act as the hydrogen acceptor of xanthine dehydrogenase of chicken liver.The reaction between xanthine and DPN being reversible,xanthine dehydrogenase of chicken liver is also capable of catalyzing the oxidation of reduced DPN by uric acid. The ratio between the velocities of reduction of DPN and of 2,6- dichlorophenolindophenol does not change appreciably in the presence of xanthine and xanthine dehydrogenase at various stages of the purification...

In agreement with the results of Morell,DPN has been found to act as the hydrogen acceptor of xanthine dehydrogenase of chicken liver.The reaction between xanthine and DPN being reversible,xanthine dehydrogenase of chicken liver is also capable of catalyzing the oxidation of reduced DPN by uric acid. The ratio between the velocities of reduction of DPN and of 2,6- dichlorophenolindophenol does not change appreciably in the presence of xanthine and xanthine dehydrogenase at various stages of the purification of the latter.In addition,during the course of cyanide treatment the de- gree of inactivation remains identical whether DPN or 2,6-dichlorophenol- indophenol is used as hydrogen acceptor.These observations show that the reduction of these two hydrogen acceptors is catalyzed by the same enzyme. Cytochrome c is reduced very slowly by xanthine or hypoxanthine in the presence of crude xanthine dehydrogenase preparation.Rapid reduc- tion of cytochrome c can be observed only after the addition of DPN. Since it is known that crude xanthine dehydrogenase preparations contain DPN-cytochrome c reductase activity,it seems likely that the rapid reduc- tion of cytochrome c is mediated by this enzyme in the presence of DPNH produced by the xanthine-xanthine dehydrogenase system.

(一)和 Morell 的观察相同鸡肝黄嘌呤脱氢酶能还原辅酶 I,活力和用2,6-二氯酚靛酚作受体相近。次黄嘌呤同样也能作底料。(二)辅酶 I 氧化黄嘌呤的作用是可逆的,鸡肝黄嘌呤脱氢酶能接鉵还原辅酶 I 为尿酸所氧化的作用。(三)辅酶 I 明显地增加鸡肝黄嘌呤氧化酶系和黄嘌呤细胞色素 c 还原酶系的活力。(四)用辅酶 I 及用2,6-二氯酚靛酚作受体的二种黄嘌呤脱氢酶活力受氰化物作用失效的程度相同,两种活力的比例在提纯过程中基本上不变,因此认为二种活力由同一酶所接触。

A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to 0.01%...

A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to 0.01% by weight of Mn~(++), p-nitroacetophenone content could be raised to a maximum of 62% within 18 to 30 hours. p-Nitrobenzoic acid and formic acid were also formed alongside with p-nitroacetophenone in an amount approximately 10% its weight, together with probably a trace of nitrophenols which was not identified. From 453 g. of p-nitroethylbenzene, after oxygenation and being chilled, the crude product separated and washed with a solution of sodium carbonate at 70-80℃ to remove p-nitrobenzoic acid, 153-161 g. of p-nitroacetophenone was obtained, m. p. 79-80℃. Unchanged p-nitroethylbenzene could be reclaimed from the mother liquor by fractionation. The role of calcium carbonate in the catalyst is, however, not only that of a neutral carrier. It was shown to exert an important moderating effect on the decomposition of the peroxide radical which was essential for the maintainance of auto-oxidation reaction chain. When manganese acetate alone was used as catalyst, the reaction was usually rapid at the onset but of short duration. "Besides, the reaction would then be very sensitive to the presence of even minute amounts of copper and iron salts which were both potent peroxide destroyers. The presence of calcium carbonate would bring to a check these deleterious effects, giving reaction liquor of light colour and high phenone content. An un-identified inhibitor was found to be formed and accumulated during the reaction.

發展了自对硝基乙苯經自动氧化以制取对硝基苯乙酮方法。产品可用冷冻法析出。最好的接触剂为附着于碳酸鈣上的醋酸錳(10:1).在攪拌下向对硝基乙苯中通氧,速度为每克每分鐘0.55ml.,温度140~145°C,接触剂用量相当于0.005~0.01%Mn~(++),在18至30小时內对硝基苯乙酮含量可达62%。接触剂中的碳酸鈣的作用,並非一單純的不活潑性載体。我們証明了:它具有延緩过氧化物分解的重要作用,而过氧化物的存在,对于自动氧化反应链锁的得以持续是必要的。它也能抵消可能存在于原料中的微量銅鹽和铁鹽对过氧化物的强力破坏作用,以得到酮含量高、色澤淺的产物。此外尚發現在反应过程中有一种未經証实的抑制物生成並积累。

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...

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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