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conversion
相关语句
  转化
    Conversion of NO with Microwave Irradiation
    微波辐射下NO转化的研究
短句来源
    Studies on the Catalytic Conversion of Alkanes to Hydrogen/Syngas
    烷烃催化转化制氢气/合成气的研究
短句来源
    Solid State NMR Study of Methanol Conversion Reaction
    甲醇催化转化反应的固体核磁共振研究
短句来源
    Experimental and Density Functional Theory Study on Plasma Methane Conversion
    等离子体转化甲烷之实验与密度泛函理论研究
短句来源
    The Activation and Conversion of Small Molecular CO_2 and CH_4
    小分子CO_2,CH_4的活化和转化研究
短句来源
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  转化率
    A HOMOGENEOUS HYDROGENATION CATALYST SYSTEM (Co(acac)_3-Et_3Al-PYRIDINE) WITH HIGH CONVERSION AND HIGH SELECTIVITY AT NORMAL TEMPERATURE AND ATMOSPHERIC PRESSURE
    一种常温常压下高转化率和高选择性的均相加氢体系—Co(acac)_3-Et_3Al-吡啶催化剂
短句来源
    Cross Fractionation of Radical Initiated Methyl Methacrylate Styrene Copolymer with High Conversion
    自由基引发的高转化率甲基丙烯酸甲酯-苯乙烯共聚物的交叉分级
短句来源
    The results showed: at the reaction temperature of 25~30 ℃,hydrogen pressure of 1.0~1.5 MPa,Vethanol∶Vcyclopentadiene of 5~6∶1,the catalyst dosage of 4 %~5 % and stirring rate of 800 r/min. The conversion of cyclopentadiene was above 98% and the selectivity to cyclopentene was also above 95 %.
    结果表明,在反应温度25-30℃,氢气分压为1.0-1.5 MPa,无水乙醇作为溶剂,V无水乙醇∶V环戊二烯为5-6∶1,催化剂用量为4%-5%,搅拌速度为800 r/min条件下,反应时间2~3 h,环戊二烯的转化率大于98%,环戊烯的选择性大于95%。
短句来源
    The CO conversion could still be higher than 95% by deposition-precipitation in 100 ℃.
    沉积-沉淀法制得的催化剂在100℃时CO的转化率依然高于95%。
短句来源
    The result showed that the catalyst was roasted at 350 ℃ for 2 h,when the ratio of it to raw materials was 2.5 g/100 mL,and the reaction was kept at 140 ℃ for 4 h,turpentine had the higher conversion rate which reached 96.13%.
    结果表明,催化剂在350℃下焙烧2h,当其用量为2.5g/100mL原料,反应在140℃下保持4h时,松节油有更好的异构化效果,转化率达96.13%,异构化产物中莰烯的含量为40.80%,苧烯为24.24%;
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  换算
    AN LNVFSTIGATION ON THE CONVERSION CALCULATION OF HIGH-TEMPERATURE PHt RELATIVE TO pH_(25)
    高温pH_t对pH_(25)换算关系的探讨
短句来源
    APPLICATION OF APPROXIMATELY QUANTITATIVE ANALYSIS OF BASE-LINE CONVERSION CALCULATION FOR DETERMINATION OF GEOLOGICAL SAMPLES
    基线换算近似定量分析法在测定地质样品的初步应用
短句来源
    Conversion Method of Retention of Fatty Acid Esters on Two Columns
    脂肪酸酯保留值的双柱换算
短句来源
    The annlication of conversion factor to the calculation of tifration analysis results
    换算因数法在滴定分析结果计算中的应用
短句来源
    and (4)Conversion coefficient of BaSO4 to S.
    (4)BaSO_4真换算成硫(S)的换算系数提出了修改意见。
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  “conversion”译为未确定词的双语例句
    Reactions of Some Monoterpenes and Nitrogen trioxide Part Ⅱ. Studies on the conditions for preparation of α-pinene nitrosite and its conversion into carvone.
    萜类化合物与三氧化二氮的反应——Ⅱ.α—蒎烯亚氮氧化物的制备条件及其转变为香芹酮的研究
短句来源
    CONVERSION OF METHANOL TO LOWER OLEFINS ON MODIFIED ZSM-5 ZEOLITE
    在改性ZSM-5沸石上从甲醇合成低碳烯烃
短句来源
    STUDY OF THE ADSORPTION AND CONVERSION OF METHANOL AND PROPENE ON HZSM-5 ZEOLITE
    甲醇与丙烯在HZSM-5上的吸附及催化机理研究
短句来源
    Infrared Study of Chemisorption and Conversion of Tert-Butanol on H_5PMo_10V_2O_40/SiO_2 Catalyst
    叔丁醇在H_5PMo_(10)V_2O_(40)/SiO_2催化剂上吸附的红外光谱研究
短句来源
    XPS STUDY OF METAL-PROMOTER-SUPPORT INTERACTION IN Rh-Nb_2O_5/SiO_2 CATALYSTS FOR SYNGAS CONVERSION TO ALCOHOLS
    XPS研究合成气制醇的Rh-Nb_2O_5/SiO_2催化剂的金属-助催剂-载体的相互作用
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  conversion
But there appeared to be species difference in arteether metabolism, highest conversion being recorded with humans followed by rats and monkeys.
      
Aldose reductase (AR) is an enzyme that catalyzes the conversion of glucose to sorbitol, which is in turn converted to fructose by sorbitol dehydrogenase.
      
The conversion of CNB could reach 99.9%, and the dechlorination of chloroaniline (CAN) was less than 1.9% when catalyzed by Pt-Sn-B/CNTs and more than 8.0% when catalyzed by common hydrogenation catalysts.
      
Results show that HY is an efficient catalyst for the acetalization and ketalization with high conversion and selectivity in mild conditions.
      
Under these conditions, the conversion and selectivity were over 50% and 97%, respectively.
      
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A sample of butadiene-styrene copolymer obtained from emulsion polymerization at 50℃ with 80% conversion has been doubly fractionated into fractions by adding successive amounts of methanol at 25℃ into a 1% solution of the polymer in benzene. From the weight and intrinsic viscosity of each fraction obtained, an integral weight distribution curve was drawn according to the method of Schulz and Dinlinger. The differential distribution curve exhibits a rather sharp maximum around the molecular weight of 50,000,...

A sample of butadiene-styrene copolymer obtained from emulsion polymerization at 50℃ with 80% conversion has been doubly fractionated into fractions by adding successive amounts of methanol at 25℃ into a 1% solution of the polymer in benzene. From the weight and intrinsic viscosity of each fraction obtained, an integral weight distribution curve was drawn according to the method of Schulz and Dinlinger. The differential distribution curve exhibits a rather sharp maximum around the molecular weight of 50,000, in agreement with many published results including one obtained from ultracentrifuge data. The fractions with [η]>3, i.e., M>500,000 took a couple of weeks to go into solution, indicating an appreciable degree of branching or slight cross-linking of the macromolecules. The viscosity data of the fractions in toluene at 30℃ show that the values of k' snd β of the equations Inη_r/C = [η] - [β] [η]~2C η_(sρ)/C = [η] + k' [η]~2C are constant, k'=0.36, being independent of molecular weight and k' + β = 1/2 for fractions with [η]>3. For fractions with [η]>3, k'>0.36, in conformity with the findings of Cragg and others that k' increases rapidly with the presence of branching or cross-linking. Besides, we found that for these fractions, k'+β>1/2, which relationship can also be used for the detection of branching in butadiene-styrene copolymer.

本文報告測定本所合成研究室用乳液聚合在50°時所製備的丁苯橡膠分子量分佈的結果。我們在1%苯溶液中,加入甲醇作沉澱劑經分級沉澱後,用粘度法測定各級份的分子量。所得分子量分佈曲線,在分子量等於50,000處有一個明顯的高峯,與前人的結果相符合。特性粘數[η]>3的級份,從它們的溶解度和在甲苯溶液中的粘度數據,我們認為有顯著的支鏈和交聯的存在,約佔試樣的25%。甲苯溶液的粘度數據指示在[η]<3時,k′=0.36,與分子量無關,而且k′+β=1/2;當[η]>3時,k′值顯著地增大,而且k′+β>1/2。 這些差異的大小,我們認為可以看作丁苯橡膠分子支鏈或交聯程度的一種量度。 從本實驗所得的丁苯橡膠的分子量分佈曲線,我們建議同時用■和■來做橡膠的品質指示。

There was described a condition for the action of hydrogen peroxide on some mercapto-pyrimidines. 2-Ethylmercapto-pyrimidines [Ⅰ, X=Cl, OCH_3, OC_2H_5, NH_2, NHCH_3 or N(C_2H_5)_2] reacted with hydrogen peroxide in ethanol to form 2-hydroxy-pyrimidines [Ⅱ, X=Cl, OCH_3, OC_2H_5, NH_2, NHCH_3 or N(C_2H_5)_2]. The reaction is represented as follows: In case that X in formula Ⅰ was C_2H_5S, it was possible to prepare uracil (Ⅱ, X=OH).By means of the above mentioned new reaction, the following pyrimidine derivatives...

There was described a condition for the action of hydrogen peroxide on some mercapto-pyrimidines. 2-Ethylmercapto-pyrimidines [Ⅰ, X=Cl, OCH_3, OC_2H_5, NH_2, NHCH_3 or N(C_2H_5)_2] reacted with hydrogen peroxide in ethanol to form 2-hydroxy-pyrimidines [Ⅱ, X=Cl, OCH_3, OC_2H_5, NH_2, NHCH_3 or N(C_2H_5)_2]. The reaction is represented as follows: In case that X in formula Ⅰ was C_2H_5S, it was possible to prepare uracil (Ⅱ, X=OH).By means of the above mentioned new reaction, the following pyrimidine derivatives were prepared:2-Hydroxy-4-X-pyrimidine (Compound Ⅱ)Nature of X Empirical Formula m.p.CI C_4H_3ON_2Cl 152-154°OCH_3 C_5H_6O_2N_2 132-134°OC_2H_5 C_6H_8O_2N_2 168-170°OH C_4H_4O_2N_2 320°(with becomposition)NH_2 C_4H_5ON_3 290-292°(with decomposition; needles transformed to cubes at 190°)X=NHCH_3 C_5H_7ON_3 268°X=N(C_2H_5)_2 C_8H_(13)ON_3 280-281°The mechanism of the action of hydrogen peroxide on 2-ethylmercapto-4-chloro-pyrimidine was considered as follows: 2-Ethylmercapto-4-chloro-pyrimidine reacted with hydrogen peroxide to form 2-ethylsulphonyl-4-chloro-pyrimidine, which was then further oxidized by hydrogen peroxide to yield 2-hydroxy-4-chloro-pyrimidine and ethyl sulphonic acid. For supporting this interpretation, the authors attempted to oxidize with hydrogen peroxide 2-ethylsulphonyl-4-chloropyrimidine, which was prepared by Sprague and Johnson's method.2-Ethylmercapto-6-alkoxy-pyrimidine (Ⅰ, X=OCH_3 or OC_2H_5) reacted with hydrogen peroxide in ethanol to form 2-hydroxy-4-alkoxy-pyrimidine (Ⅱ, X=OCH_3 or OC_2H_5) in a lower yield and uracil in a higher yield. This phenomenon was interpreted as follows: 2-ethylmercapto-6-alkoxy-pyrimidine (Ⅰ, X= OCH_3 or OC_2H_5) reacted with hydrogen peroxide to form 2-hydroxy-4-alkoxy-pyrimidine (Ⅱ, X=OCH_3 or OC_2H_5) and ethyl sulphonic acid, the latter acting as a catalyst, which would accelerate the conversion of 2-hydroxy-4-alkoxy-pyrimidine (Ⅱ,X=OCH_3 or OC_2H_5) into uracil (Ⅱ, X=OH). The change is represented as follows:2-Hydroxy-4-chloro-pyrimidine was reduced to 2-hydroxy-pyrimidine, m.p. 178-180° or m.p. 180-182°, by (a) the action of zinc dust in ethanol in presence of ammonium hydroxide and (b) by the catalytic reduction in presence of palladium-charcoal in ethanol.

1.2-乙硫醇基嘧啶[Ⅲ,X=Cl,OCH_3,OC_2H_5,NH_2,NHCH_3或N(C_2H_5)_2]与過氧化氫在乙醇溶液中作用,形成2-羥基嘧啶[Ⅳ,X=Cl,OCH_3,OC_2H_5,NH_2, NHCH_3或N(C_2H_5)_2]。 2.以過氧化氫氧化2-乙硫醇基+氯代嘧啶形成2-羥基-4-氯代嘧啶的反應歷程,作者建議如下:首先過氧化氫氧化2-乙硫醇基-4-氯代嘧啶為2-乙磺醯基-4-氯代嘧啶,再以過氧化氫進一步氧化得到2-羥基-4-氯代嘧啶。 3.2-乙硫醇基-4-烷氧基嘧啶与過氧化氫作用,形成產量較低的2-羥基-4-烷氧基嘧啶,和產量較高的2,4-羥基嘧啶。 4.2-羥基-4-氯代嘧啶(1)在乙醇溶液中,有氫氧化銨存在下和鋅粉作用及(2)在乙醇溶液中,以鈀-碳為催化劑,進行催速氫化,均還原為2-羥基嘧啶。

Quinazolone-4 was chlorinated with chlorine in glacial acetic acid,with ferric chloride ascatalyst.The reaction was carried out at different temperatures (39-100°),and with differentamount of chlorine (molar ratio of chlorine to quinazolone varying from 0. 92 to 1. 81) .Thechlorinated products were separated and purified by recrystallization from benzene,ethanol,aqueous ethanol,butanol and acetone,and were found to be 6-chloroquinazolone (m.p.268-269°),8-chloroquinazolone (m.p.300-302°) and 6,8-dichloroquinazolone...

Quinazolone-4 was chlorinated with chlorine in glacial acetic acid,with ferric chloride ascatalyst.The reaction was carried out at different temperatures (39-100°),and with differentamount of chlorine (molar ratio of chlorine to quinazolone varying from 0. 92 to 1. 81) .Thechlorinated products were separated and purified by recrystallization from benzene,ethanol,aqueous ethanol,butanol and acetone,and were found to be 6-chloroquinazolone (m.p.268-269°),8-chloroquinazolone (m.p.300-302°) and 6,8-dichloroquinazolone (m.p.347-349°)respectively.Their identities were established by elementary analysis and mixed melting point testswith known synthetic compounds.The nature and relative amount of the chlorinated products were found to be influencedsomewhat by the conditions of chlorination.Roughly speaking,the conversion of quinazolonewas below 40% in most cases,and was higher than 50% only when the reaction was carriedout at higher temperatures (97-100°) and with higher molar ratios of chlorine to quina-zolone (above 1. 5) .Only under these latter conditions,6,8-dichloroquinazolone was obtained.In most of our experiments,the yield of 6-chloroquinazolone was much higher than that of8-chloroquinazolone,and in a few cases the latter was slightly more than the former.It wasalso found that under the same or even more drastic conditions used for the chlorination ofquinazolone,both 6-and 8-chloroquinazolone gave no dichloro derivatives.

本文用冰醋酸为溶剂,氯化铁为催化剂,通入氯气,可以使喹唑酮产生氯化反应。主要产品为6-氯喹唑酮,次为8-氯喹唑酮,再其次为6,8-二氯喹唑酮。氯化时溶剂的性质,通入氯氣的量,以及反应温度,对於氯化反应及产物的相对比例均有影响。在大多数实验中,氯化物的产率均在40%以下,只有在温度较高(97-100°)时,氯化物产率才可以达到50%以上,同时也生成6,8-二氯喹唑酮。

 
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