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条件
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  condition
    Study on the Strain Improvement, Culture Condition Optimization and Fermentation Kinetics for Mildiomycin Production
    发酵法生产米多霉素的菌种选育、培养条件优化和动力学研究
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    Study on High Producing Strain Breeding, Fermentation Condition Optimization, Fermentation Kinetics and Solubility of Natamycin
    纳他霉素高产菌株选育、发酵条件优化、发酵动力学及溶解度的研究
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    The Influence of Chemical Constitution nnd Condition of Formation on the Structure and Properties of Polyurethane Elastomeric Fibres
    软段化学结构和成形条件对氨纶结构性能的影响
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    DISCUSSION ABOUT INFLUENTIAL FACTORS ON M RATIO IN DYEING OF POLYESTER DTY PART I: INFLUENCE OF FIBERS AND PROCESSING CONDITION
    涤纶DTY染色M率影响因素的探讨——第Ⅰ报 纤维性质和加工条件对M率的影响
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    The Effect of Blending Condition and Composition of PC/PET on the Morphology and Property
    PC/PET共混条件及共混物组成对形态及性能的影响
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  reaction conditions
    Study on the Separation and Identification of Various Compounds in Crude Synthetic Vitamin A and the Influences of Reaction Conditions upon Them
    合成维生素A中杂质的分离及其与反应条件的关系
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    A STUDY ON SYNTHESIS REACTION CONDITIONS OF PRESERVATIVE NIPAGIN A
    防腐剂尼泊金A合成反应条件的研究
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    SPECIAL REACTION CONDITIONS OF DIAZOTIZATION ON OF AROMATIC AMINES
    芳香伯胺重氮化的特殊反应条件
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    Study on dependence of dipentaerythritol yield on reaction conditions
    双季戊四醇收率与反应条件依赖关系研究
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    Studies on the preparation of feedstock gas for methanol synthesis by methane reforming with steam and CO_2 Ⅰ.Effects of reaction conditions on the composition if synthesis gas
    天然气-H_2O-CO_2转化制取合成甲醇原料气的研究 Ⅰ.反应条件对合成气组
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  “条件”译为未确定词的双语例句
    SCC Susceptibility Analysis of Low-alloy High-strength Steel Pressure Vessels in Wet H_2S and Nitrate Environment and Study of Safety Control Technology
    湿H_2S及硝酸盐环境中低合金高强度钢制压力容器应力腐蚀开裂敏感性条件分析与安全保障技术研究
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    Study on Gas Phase Oxidation Reaction of Propylene with Molecular Oxygen Using Plasma Activation
    等离子体条件下分子氧和丙烯进行气相氧化反应的研究
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    Study on Improved Ferment Technique of Agricultural Antibiotic 2507 and Its Application Mode
    农抗2507发酵条件优化和应用机理研究
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    Studies on cis Dichlorodiaminoplatinum(Ⅱ)(cis PDD) Ⅱ. On the Synthesis of cis PDD
    顺二氯二氨铂(cis PDD)的研究 Ⅱ、顺二氯二氨铂合成条件的研究
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    STUDIES ON THE BIOSYNTHESIS OF L-PROLINE
    L-脯氨酸生物合成条件的研究
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  condition
We also prove the shifted cocycle condition for the twistors, thereby completing Fr?nsdal's findings.
      
It is known [M4] that K?-orbits S and G?-orbits S' on a complex flag manifold are in one-to-one correspondence by the condition that S ∩ S' is nonempty and compact.
      
We give a simple necessary and sufficient condition for a Schubert
      
It is also shown that on the nilmanifold $\Gamma\backslash (H^3\times H^3)$ the balanced condition is not stable under small deformations.
      
A necessary and sufficient geometric condition on the growth of the boundary of approximate tiles is reduced to a problem in Fourier analysis that is shown to have an elegant simple solution in dimension one.
      
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  reaction conditions
The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
      
The reaction conditions were also studied and optimized.
      
The best reaction conditions: molar ratio of catechol to aldehydes or ketones is 1:1.4, catalyst amount is 3.5 g/l mol catechol, reaction time is 5 h.
      
It was found that lower residue ratios can be obtained under defined reaction conditions: phenol/wood ratio is 4, a 10% catalyst based on the weight of phenol, a temperature of 150°C for 2 h and phosphoric or sulfuric acid.
      
The main advantages of these methods were the simple and easily controlled reaction conditions, and the dispersibility of the resulting products was distinctly improved.
      
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This communication reports the results of a study of the gravimetric deter- mination of lead as normal phosphate, known as Vortmann and Bader method, which has been recently examined by Hubicki and Rys. According to our findings, tartaric acid should be added only when antimony is present. With the addition of tarearic acid unusual large excess of precipitant as suggested by Vortinann and Bader is required for complete precipitation. The suitable pH range for the precipitation of tertiary lead phosphate is 6.5...

This communication reports the results of a study of the gravimetric deter- mination of lead as normal phosphate, known as Vortmann and Bader method, which has been recently examined by Hubicki and Rys. According to our findings, tartaric acid should be added only when antimony is present. With the addition of tarearic acid unusual large excess of precipitant as suggested by Vortinann and Bader is required for complete precipitation. The suitable pH range for the precipitation of tertiary lead phosphate is 6.5 to 10. Below pH 6.5, the precipitation will be incomplete, owing apparently to the formation of acid phosphate(s). Beyond pH 10, no experiment has been made, because no advantage is gained by working in such alkaline media. The concentration of the precipitant in sdlution after reaction should be within 0.00085-0.0033 molar in order to obtain good results. The precipitates may be ignited at any temperature from 650℃ up to at least 900℃. The practice of drying the pre- cipitates at 130℃ to constant weight suggested by Hubicki and Rys should be discarded, since the precipitates still contain noticeable amounts of water after drying to constant weight at that temperature. It is preferred to use the method of precipitation from homogeneous solution. With this technique in practice dense, crystalline and easily filterable precipitates are obtained; and small quantity of lead, as low as 5 mg, may be determined satisfactorily. The effect of presence of some alkali and ammonium salts has also-been studied.

本文報告用磷酸根測定鉛重量法的各種適宜條件。溶液的pH值應在6.5至10之間。過剩沉澱劑在溶液中的濃度應為0.00085——0.0033M。沉澱應在650℃-900℃間灼燒之;如在130℃乾燥,則沉澱內的水份不能完全驅盡。均勻沉澱可改善沉澱的性質,並可测定少至5毫克的鉛。如溶液中無銻,則不必加酒石酸。

In this paper a modified method is recommended for the determination of rubber hydrocarbon present in kok-saghyz rubber by means of bromination.This method is rapid and accurate.A conversion factor of 0.298 is obtained for con- verting rubber bromide content to rubber hydrocarbon content for kok-saghyz rubber.The conversion factor agrees well with the theoretical value.

本文报告了用重量溴化法测定青橡胶草生胶中橡胶烃的各种适宜条件,并求得了由溴化橡胶换算为橡胶烃的换算因数为0.298。三氯甲烷可用来防止溴化橡胶的结膜,同时并可防止溴与橡胶的置换反应。每10毫升橡胶液应加溴化溶液2毫升。溴化反应可在常温进行。三氯醋酸可使橡胶容易溶解,对分析结果无显著影响,用或不用均可。溴化法无论在分析时间上和精确度上,均较直接抽提法和间接测定法为优。

Aureomycin (Ⅰ) on reduction with zinc-acetic acid gives desdimethylaminoaureomycin (Ⅱ) under mild conditions and desdimethylaminodesoxyaureomycin (Ⅲ) under more drastic conditions. Ⅱ can be converted into Ⅲ by further reduction. Treatment of Ⅰ, Ⅱ or Ⅲ with concentrated hydrochloric acid or methanolic HCl produces anhydroaureomycin (Ⅳ), desdimethylaminoanhydroaureomycin (Ⅴ) or desdimethylaminodes- oxyanhydroaureomycin (Ⅵ) respectively. Compound (Ⅴ) can be obtained from Ⅳ by hydrogenolysis, and, similarly, Ⅵ...

Aureomycin (Ⅰ) on reduction with zinc-acetic acid gives desdimethylaminoaureomycin (Ⅱ) under mild conditions and desdimethylaminodesoxyaureomycin (Ⅲ) under more drastic conditions. Ⅱ can be converted into Ⅲ by further reduction. Treatment of Ⅰ, Ⅱ or Ⅲ with concentrated hydrochloric acid or methanolic HCl produces anhydroaureomycin (Ⅳ), desdimethylaminoanhydroaureomycin (Ⅴ) or desdimethylaminodes- oxyanhydroaureomycin (Ⅵ) respectively. Compound (Ⅴ) can be obtained from Ⅳ by hydrogenolysis, and, similarly, Ⅵ from either IV or V. All the above compounds, (Ⅰ), (Ⅱ), (Ⅲ), (Ⅳ), (Ⅴ) and (Ⅵ), when subjected to zinc dust distillation, form naphthacene. A comparison of the ultra-violet absorption spectra of Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ and Ⅵ affords a supplementary evidence for the location of the angular-OH group in the structure of aureomycin.

金黴素(I)在冰醋酸與甲醇溶液中,用鋅粉氫解,在温和條件下,產生脫二甲胺金黴素(II);較劇烈條件下,則生成脫二甲胺脫羥金黴素(III)。III從II經鋅粉醋酸氫解得到。 I,II,III分別與濃鹽酸或甲醇鹽酸處理相應地得到脫水金黴素(IV),脫二甲胺脫水金黴素(V)及脫二甲胺脫羥脫水金黴素(VI)。脫水金黴素(IV)經鋅粉醋酸氫解亦產生V與VI。VI亦可從V製成。 I,II,III,IV,V或VI和鋅粉共同蒸餾,皆得到并四苯。 從紫外吸收光譜測定,對金黴素結構中二甲胺基及角羥基的位置有補充的說明。

 
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