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acetic acid     
相关语句
  乙酸
     Studies on Direct of CH_4 and CO_2 to Acetic Acid by Two-step Reaction Sequence
     CH_4-CO_2两步反应直接合成乙酸研究
短句来源
     Study on the Heteropoly Compound Catalysts for Ethane Selective Oxidation to Acetic Acid and Acetaldehyde
     乙烷选择氧化制乙酸和乙醛杂多化合物催化剂的研究
短句来源
     Effect of Propionic/Acetic Acid and pH on Enriched Culture of Glycogen Accumulation Organisms (GAOs)
     丙酸/乙酸比例及pH对聚糖菌富集系统的影响
短句来源
     Studies on Kinetics and Reaction Separation Technology for Chlorination of Acetic Acid
     乙酸氯化反应动力学及反应分离耦合工艺研究
短句来源
     STUDIES ON VITAMIN D Ⅱ.THE SYNTHESIS OF COMPOUNDS OF 2-SUBSTITUTED CIS-CYCLOHEXYLIDENE ACETIC ACID TYPE (I)2, 2-DIHYDROXY-CYCLOHEXYLIDENE ACETIC ACID LACTONE AND ITS ISOMERS
     维生素丁的研究Ⅱ. 2-取代-顺-亚环己基乙酸类化合物的合成(一)2,2-双羟亚环己基乙酸内酯及其异构体
短句来源
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  醋酸
     THE PHARMACOKINETICS OF ~(14)C-GOSSYPOL ACETIC ACID IN RATS
     ~(14)C-醋酸棉酚在大鼠体内的药物动力学的研究——Ⅰ.在大鼠体内分布、定位的整体及组织放射自显影的动态观察
短句来源
     THE PHARMACOKINETICS OF ~(14)C-GOSSYPOL ACETIC ACID IN——RATS Ⅱ.QUANTITATIVE STUDIES ON THE KINETICS OF THE DISTRIBUTION,EXCRETION AND METABOLISM OF ~(14)C-GOSSYPOL ACETIC ACID IN THE RAT BODY.
     ~(14)C-醋酸棉酚在大鼠体内的药物动力学研究——Ⅱ.在大鼠体内分布、排泄和代谢的动态的定量分析
短句来源
     LRC-201 SELF-TUNING REGULATOR FOR THE LEVEL OF ACETIC ACID DISTILLATOR
     LRC-201醋酸蒸发器液位自校正调节器
短句来源
     EFFECT OF GOSSYPOL ACETIC ACID ON TESTOSTERONE, LH AND FSH LEVELS OF MALE RATS
     醋酸棉酚对雄性木鼠睾酮、黄体生成素(LH)和卵泡刺激素(FSH)的影响
短句来源
     The Optimum Control for Acetic Acid Cracking Temperature
     醋酸裂化温度的最优控制
短句来源
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  冰醋酸
     Methods Glycyrrhizic acid was separated on Agilent Eclipse XDB-C_(18) column (250 mm×4.6 mm,5μm) with a mobile phase of methanol-0.2 mol/L ammonium acetate solution-glacial acetic acid (67:33:1) and detected at 250 nm with a flow rate of 1.0 mL/min.
     方法采用Agilent Eclipse XDB-C_(18)柱(250mm×4.6mm,5μm),流动相为甲醇- 0.2mol/L醋酸铵溶液-冰醋酸(67∶33∶1),流速为1.0mL/min,检测波长为250nm。
短句来源
     Methods The ODS-C18(Diamond)(250 mm×4.6 mm,5 μm)column was selected,the mobile phase was composed of acetonitile-1%acetic acid(20 ∶80),the flow rate was 1.0 mL/min,detection wavelength was 322 nm,the injection volume was 10 μL.
     方法采用ODS-C18(钻石)色谱柱(250mm×4.6mm,5μm),流动相为乙腈-1%冰醋酸(20∶80),流速为1.0mL/min,检测波长为322nm,进样量为10μL。
短句来源
     Methods LC:Use Kromasil C18 (150 mm× 4. 6 mm,5μm) with the mobile phase consisting of acetonitrile-10 mmol· L-1 acetateamine buffer - glacial acetic acid (50:50:0. 45 ) .
     方法 色谱条件 为Kromasil C18(150 mm×4.6mm,5μm),流动相:乙腈-10mmol·L-1醋酸铵 缓冲液-冰醋酸(50:50:0.45);
短句来源
     The R, values are 0.59, 0.53 and 0.48 respectively using a developping agent of benzene: ether: glacial acetic acid = 7:2:1 ( V/ V/ V). The detection limits are 1.07 × 10-4 , 1.64 × 10-4 and 1.90× 10-4 mol/L respectively.
     展开剂为苯:乙醚:冰醋酸=7:2:1(V/V/V),R_f值分别为0.59,0.53,0.48.检测限分别为1.07×10~(-4),1.64×10~(-4),1.90×10~(-4)mol/L.
短句来源
     the mobile phases for probenecid was H2O-acetonitrile-1 mol/L KH2PO4-1 mol/L acetic acid (59.5 ∶39.8 ∶0.62 ∶0.08,V/V),and added 0.15%triethylamine (pH=2.76).
     丙磺舒流动相为水-乙腈-1mol/L磷酸二氢钾溶液-1mol/L冰醋酸(59.5∶39.8∶0.62∶0.08,V/V),加入0.15%的三乙胺调节pH=2.76; 流速均为1.4mL/min。
短句来源
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  乙酸的
     Studies on Photodegradation of Acetic Acid by UV/H_2O_2 and UV/O_3 Processes
     UV/H_2O_2法和UV/O_3法降解乙酸的研究
短句来源
     Oxidation of Ethylene to Acetic Acid I.Pd-H_3PO_4/SiO_2 Catalytic Performance
     乙烯直接氧化制乙酸的研究 I.Pd-H_3PO_4/SiO_2催化剂的性能
短句来源
     Investigation on Direct Oxidation of Ethylene to Acetic Acid Ⅱ. Effect of Promoters on Catalytic Performance of Pd-Se/H_4SiW_(12)O_(40)/SiO_2
     乙烯直接氧化制乙酸的研究 Ⅱ.助剂对Pd-Se/H_4SiW_(12)O_(40)/SiO_2催化性能的影响
短句来源
     3. When DO is 2. 5mg/l, the average quantity of biological uptake for glucose and acetic acid is 45. 90 mg glucose/g MLSS, 171. 77 mg HAc/g MLSS respectively;
     3.DO为2.5mg/1时,葡萄糖、乙酸的平均生物吸收量分别为45.90mg glucose/gMLSS和171.77mg HAc/g MLSS;
短句来源
     The extraction effect of acetic acid on collagen was better than that of critic acid with the extraction ratios being 34.8%,23.6%,33.6% and 43.0% and with the yields being 8.5%,6.6%,8.63% and 6.19% respectively,which was 2.4~4.3 and 1.7~4.0 times higher than those of extracting with critic acid.
     乙酸的提取效果优于柠檬酸,对应提取率分别为34.8%、23.6%、33.6%、43.0%,得率依次为8.5%、6.6%、8.63%、6.19%,比柠檬酸相应高2.4-4.3倍、1.7-4.0倍。
短句来源
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  acetic acid
Moreover, introduction of an acetic acid side chain on 2H-pyridazine-3-one and 6-chloropyridazine did not improve the AR inhibitory activity, which was an unexpected result.
      
These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives.
      
Though only two esters showed antiinflammatory activity similar to that of the parent drug at equivalent dose levels, all the esters were equipotent to indomethacin in the mouse acetic acid-induced writhing assay for analgesic action.
      
A sensitive high-performance liquid chromatography (HPLC) method was established for the determination of concentration of 5-FU-1-acetic acid in the gastrointestinal contents and plasma of rats.
      
5-FU-1-acetic acid released from 5-FU-PT was mainly distributed in the cecum and colon.
      
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Lecocq first found that the sensitivity of diphenylcarbazide test for molybdate ions in mineral acid medium was 1:2.6×10~5 (it is assumed that he used com- mercial ammonium molybdate),and Schmitz-Dumont reported a value of 1:2 ×10~6 in acetic acid solution.In the present investigation,it is found that the sensitivity is still higher (1:5×10~7) when the test is carried out in the neutral medium (and in test tubes with an inner diameter of 10 mm).Evidently the sensitivity is greatly influenced by the concentration...

Lecocq first found that the sensitivity of diphenylcarbazide test for molybdate ions in mineral acid medium was 1:2.6×10~5 (it is assumed that he used com- mercial ammonium molybdate),and Schmitz-Dumont reported a value of 1:2 ×10~6 in acetic acid solution.In the present investigation,it is found that the sensitivity is still higher (1:5×10~7) when the test is carried out in the neutral medium (and in test tubes with an inner diameter of 10 mm).Evidently the sensitivity is greatly influenced by the concentration of hydrogen ions. The use of the dipbenylcarbazide as a qualitative reagent for tungstate ions has not yet been recorded before.It is found that in the neutral medium the sensitivity of the test is 0.1[D]~5,which is the same as that for molybdate under similar conditions.

本文报告在中性溶液中,对称-二苯基碳酰二胼对钨、钼的灵敏度,两者都是1:5×10~7,或以0.1[D]~5表示之。钨、钼酸根的灵敏度随溶液中氢离子的多寡而不同。

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm,...

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm, and melted at 62-65°. It was recrystallized from petroleum ether, m.p. 65-66°. In the above reaction, there was isolated a white solid, suspending in the ethereal solution and being collected separately. This white solid, considered as a by-product, was dissolved in hot water and acidified with acetic acid, whereupon it separated in needles. After recrystallization from water, it melted at 201-202°. It was tentatively assigned to be 4-methyl-2-methoxy- uracil. Further, 2,6-dialkoxy-pyrimidines were prepared similarly as 4-methyl-2,6-dimethoxy- pyrimidine: 4-Methyl-2,6-dichloropyrimidine reacted with sodium ethylate in anhydrous ethyl alcohol, forming 4-methyl-2,6-diethoxy-pyrimidine, which boiled at 110°/11 ram. 4-Methyl- 2,6-dichloropyrimidine was treated with sodium n-propoxide in normal propyl alcohol, forming 4-methyl-2,6-di-n-propoxy-pyrimidine, which boiled at 120°/5 mm. 4-Methyl- 2,6-dichloropyrimidine reacted with sodium iso-propoxide in isopropyl alcohol, forming 4-methyl-2,6-di-isopropoxy-pyrimidine, which boiled at 103°/3 mm. The action of sodium n-butoxide in normal butyl alcohoI upon 4-methyl-2,6-dichloropyrimidnie gave 4-methyl- 2,6-di-n-butoxy-pyrimidine, which boiled at 147-148°/5 mm. The action of sodium isobutoxide in isobutyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4-methyl-2,6- isobutoxy-pyrimidine, which boiled at 132-133°/6 mm. The action of sodium isopentoxide in isopentyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4 methyl-2,6-di-isopentoxy- pyrimidine, which boiled at 145-146°/3 mm. 4-Methyl-2,6-dichloropyrimidine reacted with sodium benzoxide in benzyl alcohol, giving 4-methyl-2,6-dibenzoxy-pyrimidine, which boiled at 231°/6 mm. 4-Methyl-2,6-dimethoxy-pyrimidine was heated in a sealed tube at 330-350°, giving the completely rearranged isomeric compound, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation at 130° at 10 mm and then by recrystallization from 95% alcohol. The latter melted at 107-109°. Nevertheless, 4-methyl-2,6-dimethoxy-pyrimidine was dis- solved in methyl iodide, and kept at room temperature in the dark with occasional shaking; whereupon the partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine, gradually separated out. After recrystallization from absolutealcohol, it melted at 134-135.5°. Its structure was established as follows: Pure 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine was heated with dilute hydrochloric acid for one hour; whereupon 3,4-dimethyl-uracil, m.p. 220-221°, separated out. This partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy- pyrimidine was heated at 335-350° and was again transformed into its stable and completely rearranged modification, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation and then recrystallization from 95% alcohol. The latter melted at 109-110°.

(1)4-甲基-2,6-二氯代嘧啶與鈉醇和醇的溶液作用,可以形成相應的2,6-二烴氧基嘧啶。 (2)4-甲基-2,6-二甲氧基嘧啶加熱至高温度即可轉變成其穩定結構的異構體1,3,4-三甲基-2,6-二羥基嘧啶。另一方面,在碘代甲烷催化劑的影響下,部份轉變成2-氧代-3,4-二甲基-6-甲氧基嘧啶;此化合物加熱卽可發生完全的轉變作用而形成其異構體1,3,4-三甲基-2,6-二羥基嘧啶。

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,...

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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