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产品纯度
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  product purity
     The yield of these reactions is 85.3% , 92.9% , 86.0% and 82.9% respectively. The product purity is all over 98% .
     收率分别为85.3%,92.9%,86.0%和82.9%,产品纯度均达98%以上。
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     The yield of the product is 74%,and product purity is over 97%.
     总收率74%,产品纯度97%以上。
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     All testing results are examined with recovery of 99% and product purity of 99.99%.
     获得回收率>99%,产品纯度99.99%。
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     The results showed that TmSO2-4/TiO2 exhibited better catalytic properties than other catalysts, with citric acid conversion of 944%, selectivity to TBC of 992%, ester yield of 936% and product purity of over 99%.
     实验结果表明,Tm SO2-4/TiO2的催化性能优于其他催化剂,用于合成柠檬酸三丁酯反应的柠檬酸转化率达94 4%,柠檬酸三丁酯选择性为99 2%,产率达93 6%,产品纯度>99%。
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     The optimal result indicates reaction yield>90%,the product purity>995%,and the product chrominance≤50.
     结果在优化条件下反应收率>90%,产品纯度>99.5%,产品色度≤50。
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  “产品纯度”译为未确定词的双语例句
     When the mole ratio of Z-Cl∶L-Ala=1.3∶1,pH value is 12~13,the reaction temperature is 10~20℃,the reaction time is 8 h,the results shows that the purity of final product is 98.5% with the yield over 97%.
     结果表明,当Z-C l∶L-A la=1.3∶1(摩尔比),pH值为12~13,反应温度为10~20℃,反应8 h,所得产品纯度大于98.5%,产率大于97%。
短句来源
     The yield of 2-methoxy-4-propenylphenyl benzyl ether reached 92.52%, and the purity of the product was 98.5%.
     催化剂=5.89%(相对于2-甲氧基-4-丙烯基苯酚质量分数),2-甲氧基-4-丙烯基苯基苄基醚的收率可达到92.52%以上,产品纯度98.5%。
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     (1) 2,6-Difluorobenzonitrile is obtained by fluorization with DMF in 95.1 % yield and 98.2% purity.
     (1)用N,N-二甲基甲酰胺为溶剂进行氟代反应制备2,6-二氟苯甲腈,产品纯度为98.2%,收率95.1%。
短句来源
     (2) 2,6-Difluorobenzamide is obtained by alkaline catalytic reaction in 93% yield and 98.5% purity.
     (2)在碱性条件下合成2,6-二氟苯甲酰胺,产品纯度为98.5%,收率93%。
短句来源
     (2)2,6-Difluorobenzamide was abtained by alkaline catalytic reaction in 93% yield and of 98.5% purity
     (2)在碱性条件下合成2,6-二氟苯甲酰胺,产品纯度为98.5%,收率93%。
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     Products
     产品
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     The purity is above 98 %.
     产品纯度大于98%。
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     The purity of product is 98%.
     产品纯度为 98%。
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     Products Recommendation
     产品推介
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  product purity
The criteria for the optimization of preparative chromatography are sample throughput and product purity.
      
Product purity and other specifications (yield, productivity, eluent consumption) were measured by gas chromatography.
      
This method possesses the merits of easy operational approach, high product purity, high reaction rate and high production rate.
      
Energy of vented gases as a means for improving product purity during swing adsorption
      
Traditional lactic acid fermentation suffers from low productivity and low product purity.
      
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In the improved method, after the phosphorylation reaction had approached equilibrium, a few ml, of phosphoric acid and 2 volumes of 95% ethyl alcohol was then added, (final pH approches 4.0). At this pH, inorg, phosphate is chiefly in the form KH_2PO_4, which is insoluble in alcohol and precipitated together with starch and proteins. (the p'p't may be used again for the preparation of G-1-P) and the filtrate was then made alkaline to phenol red. A p'p't of pot. salt of G-1-P was formed together with some inorg,...

In the improved method, after the phosphorylation reaction had approached equilibrium, a few ml, of phosphoric acid and 2 volumes of 95% ethyl alcohol was then added, (final pH approches 4.0). At this pH, inorg, phosphate is chiefly in the form KH_2PO_4, which is insoluble in alcohol and precipitated together with starch and proteins. (the p'p't may be used again for the preparation of G-1-P) and the filtrate was then made alkaline to phenol red. A p'p't of pot. salt of G-1-P was formed together with some inorg, phosphate, which could be removed by satd. magnesia mixt. The product of G-1-P was recrystallized, if desired.

1.制备α-葡萄糖-1-磷酸酯钾盐时省去抑制剂,并未发现对平衡速率和G-1-P产量的影响。 2.利用G-1-P与钾的磷酸盐在pH=4.2时在酒精中溶解度的不同,大为简化了制备G-1-P的方法,所得的产品纯度也高。

2,3-Dimercaptosuccinic acid-S_2~(35) has been synthesized as follows: Sodium sulphide S~(35) (Ⅰ) was oxidized with iodine to give sulphur-S~(35) (Ⅱ). The latter was convertcd into phosphorous pentasulphide-S_5~(35) (Ⅲ) by the action of red phosphorous. Interaction of Ⅲ and acetic acid gave thiolacetic acid-S~(35) (Ⅳ). 2,3-Bis-acetylthiosuccinic acid-S_2~(35) (Ⅴ) was obtained by the addition of compound Ⅳ to acetylenedicarboxylic acid. Upon hydrolysis of V the desired 2,3-dimercaptosuccinic acid-S_2~(35) (Ⅵ)...

2,3-Dimercaptosuccinic acid-S_2~(35) has been synthesized as follows: Sodium sulphide S~(35) (Ⅰ) was oxidized with iodine to give sulphur-S~(35) (Ⅱ). The latter was convertcd into phosphorous pentasulphide-S_5~(35) (Ⅲ) by the action of red phosphorous. Interaction of Ⅲ and acetic acid gave thiolacetic acid-S~(35) (Ⅳ). 2,3-Bis-acetylthiosuccinic acid-S_2~(35) (Ⅴ) was obtained by the addition of compound Ⅳ to acetylenedicarboxylic acid. Upon hydrolysis of V the desired 2,3-dimercaptosuccinic acid-S_2~(35) (Ⅵ) was obtained. This method has been found to be satisfactory for the synthesis with the advantages of convenience and safety in handling.

本工作简化2,3-二巯基丁二酸的合成步骤,以半微量法制各其硫~(35)标记的化合物(Ⅵ)。此法操作步骤较为简便安全,产品纯度及产率均满意。

In the previous paper it was reported that o-methoxy-p-[bis-(2-chloroethyl)-amino]phenylalanine (I, designated as 3P) exhibited marked inhibition against sarcoma 180, Guerin's carcinoma, Walker's carcinoma, Ehrlish ascites carcinoma, Spindle cell sarcoma and Yoshida ascites carcinoma, and its toxicity was somewhat lower than that of sarcolysin. Clinical studist showed that it possessed pronounced inhibiting action against some neoplastic diseases. For the purpose of simplifying the method of preparation, a novel...

In the previous paper it was reported that o-methoxy-p-[bis-(2-chloroethyl)-amino]phenylalanine (I, designated as 3P) exhibited marked inhibition against sarcoma 180, Guerin's carcinoma, Walker's carcinoma, Ehrlish ascites carcinoma, Spindle cell sarcoma and Yoshida ascites carcinoma, and its toxicity was somewhat lower than that of sarcolysin. Clinical studist showed that it possessed pronounced inhibiting action against some neoplastic diseases. For the purpose of simplifying the method of preparation, a novel synthesis of I has now been developed. When ethyl o-methoxy-p-[bis-(2-hydroxyethyl)-amino]-benzyl-formamido-malonate(Ⅱ)was chlorinated with thionyl chloride or phosphorus oxychloride, the product Ⅲ was an oilysubstance which was subjected to hydrolysis with hydrochloric acid to form I, but with poor yield. In this investigation, the chlorination was carried out by employing phosphorus pentachloride in dichloromethane and thus crystalline Ⅲ was obtained, from which I was obtained with satisfactory yield. In this communication, the synthesis of I starting with m-amino-anisole (IV) was also described. Compound IV was condensed with ethylene oxide in dilute acetic acid to give m-[bis-(2-hydroxyethyl)-amino]-anisole (V) which was then converted to o-methoxy-p[bis-(2-chloroethyl)-amino]-benzaldehyde (VI)by phosphorus oxychloride and dimethyl formamide. By condensation of compound VI with hippuric acid, 4-{o-methoxy-p-[bis(2-chloroethyl)-amino]}-phenylene-2-oxazolone-5 (VII) was obtained. The azlactone VII was subjected to alcoholysis on treatment with alcoholic potassium hydroxide to form methyl a-benzoylamido-{o-methoxy-p-[bis-(2-chloroethyl)-amino]}-cinnamate (VIII). Reductionof the latter by means of zinc dust or catalytic hydrogenation in the presence of palladium black gave N~a-benzoyl-o-methoxy-p-[bis-(2-chloroethyl)-amino]-phenylalanine methyl ester (IX), from which I was obtained on further hydrolysis. When compound IX was subiected to partial hydrolysis, there was obtained N~a-benzoyl-{o-methoxy-p-[bis-(2-chloroethyl)amino]}-phenylalanine hydrochloride (X). By treating the latter with ethanol or methanol o-methoxy-p-[bis-(2-chloroethyl)-amino]-phenylalanine ethyl ester (Ⅺ) or methyl ester (Ⅸ) was formed.

隣甲氧基-对[双-(2-氯乙基)-氨基]-苯丙氨酸(Ⅰ)对多种动物肿瘤有明显的抑制作用,临床试用结果表明:它对某些肿瘤有较好的疗效,为了简化合成方法,提高产率,我们进一步研究了(Ⅰ)的合成方法,本文报导了以间氨基-苯甲醚(Ⅳ)为原料,通过六步反应合成了(Ⅰ),总产率为29%左右,产品的理化性质及抗肿瘤作用均与已知物相同,此外还研究了自(隣甲氧基-对[双-(2-羟乙基)-氨基])-苄基-甲酰氨基-丙二酸乙酯(Ⅱ)制备(Ⅰ)的条件,发现(Ⅱ)在二氯甲烷中以五氯化磷氯化的结果较好,可分得结晶状的氯化产物(Ⅲ),后者水解卽得(Ⅰ),产品的纯度及产率均比用亚硫酰氯或氧氯化磷法为佳。

 
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