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middle fraction
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  中梗死
     The patients with cerebral fraction were divided into small fraction group(< 5 cm3),middle fraction group(5 to 15 cm3) and large fraction group(>15 cm3) according to the area of fraction.
     将脑梗死患者按梗死体积分为小梗死组(<5cm3),中梗死组(5~15cm3),大梗死组(>15cm3);
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  中间级分
     Along with decrease of starch particle size, the amylose content and molecular weight dropped, the middle fraction content increased, the amylopectin content and molecular weight almost didn't change.
     随淀粉粒度的减小 ,直链淀粉含量和分子量降低 ,中间级分含量增高 ,支链淀粉含量和分子量几乎不变
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  “middle fraction”译为未确定词的双语例句
     Middle fraction group 3 Gy/f,3 f/w,Dt 30 ~ 42 Gy;
     中分割组:每次3 Gy,每周3次,总量30~42 Gy;
短句来源
     Needle coke from petroleum residue- a study of the thermal behavior of the middle fraction of the residue
     石油渣油制备针状焦研究——中间馏分热反应研究
短句来源
     Study on Aromatization of FCC Gasoline Middle Fraction over Phosphor Modified Zn/HZSM-5 Catalyst
     催化裂化汽油中间馏分芳构化降烯烃研究
短句来源
     After a middle fraction was taken off, the filtrate was evaporated to dryness and the d-γ-(6-methoxy-2-carboxy- 1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid-brucine salt was obtained as a gummy mass. No attempt was made to purify this fraction of the salt.
     由此鹽得到 l-γ(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。
短句来源
     Each fraction of the degree tube was collected and artificial insemination was made. The rate of female newborn rabbits was 46.8% (29/62) with the upper fraction (1, 2, 3 degree) , 51.6% (16/31) with the middle fraction (4, 5 degree) and 64.0% (39/61) with the lower fraction (8, 9, 10 degree) respectively.
     上层精子得到10窝共62只仔兔,其中雌性29只(46.8%),雄性33只(53.2%),中层精子得到5窝共31只仔兔,其中雌性16只(51.6%),雄性15只(48.4%); 下层精子得到12窝共61只仔兔,其中雌性39只(64.0%),雄性22只(36.0%)。
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  相似匹配句对
     In the Middle
     人在中途
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     Middle molecular fraction has a thrombolysis activity.
     中等分子组分具有溶性活性;
短句来源
     9 were in the middle.
     鲁花 9号居中
短句来源
     Meanwhile,in the process of ecological environment construction,the middle and high grade vegetation fraction degraded.
     与此同时,在生态环境建设过程中,原有中、高覆盖度植被发生退化。
短句来源
     Fraction of Time in Narration
     虚构叙事中时间的分形
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  middle fraction
After calcination in air the catalyst was divided into three different parts which were analyzed separately revealing the formation of FeVO4 in the top and bottom fraction of the crucible and Fe2V4O13 in the middle fraction.
      
The repeated freezing and thawing resulted in breaking of the water-fat emulsion, which caused a significant (p>amp;lt;0,001) increase of the amount of released water in the middle fraction.
      
The uppermost fraction contained mainly fat, the middle fraction water and soluble proteins, and the lowest fraction the solid material as liver and meat and also some water and fat which they hold.
      
The middle fraction was collected and stored in a polythene bottle.
      
The middle fraction was collected and stored in a stoppered polythene bottle.
      
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γ-(6-Methoxy-2-carboxy-3,4-dihydro-l-naphthyl)-butyric acid was reduced in the presence of 5% Pd-C to the saturated acid, γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro- 1-naphthyl)-butyric acid, by the method of Bachmann and co-workers. From this reaction only one of the two diastereoisomers was obtained as the principal product. This acid was resolved into its optical antipodes with brucine in anhydrous methanol. The 1-γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid-brucine salt, being...

γ-(6-Methoxy-2-carboxy-3,4-dihydro-l-naphthyl)-butyric acid was reduced in the presence of 5% Pd-C to the saturated acid, γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro- 1-naphthyl)-butyric acid, by the method of Bachmann and co-workers. From this reaction only one of the two diastereoisomers was obtained as the principal product. This acid was resolved into its optical antipodes with brucine in anhydrous methanol. The 1-γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid-brucine salt, being less soluble, was readily obtained pure in crystalline form. After a middle fraction was taken off, the filtrate was evaporated to dryness and the d-γ-(6-methoxy-2-carboxy- 1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid-brucine salt was obtained as a gummy mass. No attempt was made to purify this fraction of the salt. By dissolving the crystalline portion of the brucine salt in an appropriate amount of chloroform and shaking the solution with 2N KOH for four times, followed by acidification of the alkaline solution, pure 1-acid was obtained as a colorless crystalline compound. After recrystallization from benzene-ethanol, the pure 1-acid melted at 171-172°and its [α]_D~(25) is -123°. The d-acid was liberated from the last gummy fraction of the brucine salt in the same fashion and after recrystallization from benzene-ethanol, it melted at 171-172°and its [α]_D~(25) is +121°. The 1-acid was esterified with diazomethane and its dimethyl ester was cyclized by the Dieckmann reaction. The sodium salt of the product from the Dieckmann reaction was methylated with CH_3I following the method used by Bachmann and co-workers in their synthesis of estrone A, and a mixture of the diastereoisomers of d-1-keto-2-methyl-2- carbomethoxy-7-methoxy-1, 2, 3, 4, 9, 10, 11, 12-octahydrophenanthrene was obtained as a yellow oil. By recrystallizing from acetone-petroleum ether only the least soluble isomer was obtained pure. It melted at 114-116°and its [α]_D~(25) is +89°in anhydrous ethyl alcohol. In the same fashion, d-γ-(6-methoxy-2-carboxy-1, 2, 3, 4-tetrahydro-1-naphthyl)-butyric acid was esterified and cyclized by the Dieckmann reaction followed by methylation and a mixture of the diastereoisomers of 1-1-keto-2-methyl-2-carbomethoxy-7-methoxy-1, 2, 3, 4, 9, 10, 11, 12-octahydrophenanthrene was obtained as a yellow oil. By recrystallizing from acetone-petroleum ether, only the least soluble isomer was obtained pure. It melted at 114-116° and its [α]_D~(25) is -90.4°. By means of the Reformatsky reaction between d-1-keto-2-methyl-2-carbomethoxy-7- methoxy-1, 2, 3, 4, 9, 10, 11, 12-octahydrophenanthrene and methyl bromoacetate, a methyl- d-1-hydroxy-2-methyl-2-carbomethoxy-7-methoxy-1, 2, 3, 4, 9, 10, 11, 12-octahydrophenan- threne-1-acetate was obtained. This dimethyl ester was recrystallized from methyl alcohol. It melted at 86-88° with slight previous softening and its [α]_D~(25) is +113.6° in anhydrous ethyl alcohol. In the same way, the methyl 1-1-hydroxy-2-methyl-2-carbomethoxy-7- methoxy-1, 2, 3, 4, 9, 10, 11, 12-octahydrophenanthrene-1-acetate was obtained from the 1-keto ester. The dimethyl ester was recrystallized from methyl alcohol; it melted at 86-88° with previous softening and its [α]_D~(25) is -113° in anhydrous ethyl alcohol.

1.用Cr_2O_3精製過的乙酸爲溶劑,5% Pd-C爲催化劑,γ-(6-甲氧基-2-羧基-3,4-二氫化萘-1-)丁酸很容易還原爲γ(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。由此反應,祇得到一個非對映體爲主要產品。將此非對映體在純甲醇溶液內與馬錢子鹼化合,得到兩部分溶解度不同的鹽。溶解度較小的鹽結晶析出。此部分爲l-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸-馬錢子鹼鹽。由此鹽得到 l-γ(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。將溶劑除去後得到的剩餘物爲d-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸馬錢子鹼鹽。由此部分得到d-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。 2.由1-γ-(6-甲氧基-2-甲氧羰基-1,2,3,4-四氫化萘-1-)丁酸甲酯用Dieck-mann反應及甲基化後,得到d-1-酮-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲的非對映體混合物。由d-γ-(6-甲氧基-2-甲氧羰基-1,2,3,4-四氫化萘-1-)丁酸甲酯用Dieckmann反...

1.用Cr_2O_3精製過的乙酸爲溶劑,5% Pd-C爲催化劑,γ-(6-甲氧基-2-羧基-3,4-二氫化萘-1-)丁酸很容易還原爲γ(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。由此反應,祇得到一個非對映體爲主要產品。將此非對映體在純甲醇溶液內與馬錢子鹼化合,得到兩部分溶解度不同的鹽。溶解度較小的鹽結晶析出。此部分爲l-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸-馬錢子鹼鹽。由此鹽得到 l-γ(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。將溶劑除去後得到的剩餘物爲d-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸馬錢子鹼鹽。由此部分得到d-γ-(6-甲氧基-2-羧基-1,2,3,4-四氫化萘-1-)丁酸。 2.由1-γ-(6-甲氧基-2-甲氧羰基-1,2,3,4-四氫化萘-1-)丁酸甲酯用Dieck-mann反應及甲基化後,得到d-1-酮-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲的非對映體混合物。由d-γ-(6-甲氧基-2-甲氧羰基-1,2,3,4-四氫化萘-1-)丁酸甲酯用Dieckmann反應及甲基化後,得到1-1-酮-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲的非對映體混合物。由每一組非對映體混合物,我們現在祇分離了在丙酮-石油醚混合溶劑中溶解度最小的那部分結晶體。 3.由d-1-酮-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲及溴代乙酸甲酯,用Reformatsky反應,得到d-1-羥基-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲-1-乙酸甲酯。由l-1-酮-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲及溴代乙酸甲酯,用Reformatsky反應,得到l-1-羥基-2-甲基-2-甲氧羰基-7-甲氧基-1,2,3,4,9,10,11,12-八氫化菲-1-乙酸甲酯。

Rabbits sperm was separated using Percoll density gradient (10 degrees) with centrifuge (250g, 30min) . Each fraction of the degree tube was collected and artificial insemination was made. The rate of female newborn rabbits was 46.8% (29/62) with the upper fraction (1, 2, 3 degree) , 51.6% (16/31) with the middle fraction (4, 5 degree) and 64.0% (39/61) with the lower fraction (8, 9, 10 degree) respectively.

用Percoll梯度离心分离家兔精子,收取梯度管上、中、下各层精子给母兔人工授精。上层精子得到10窝共62只仔兔,其中雌性29只(46.8%),雄性33只(53.2%),中层精子得到5窝共31只仔兔,其中雌性16只(51.6%),雄性15只(48.4%);下层精子得到12窝共61只仔兔,其中雌性39只(64.0%),雄性22只(36.0%)。

We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94% wt). Sintaneously the refined carbazole products with high purity (over 91%) were obtained by means of distillation and recrystal,...

We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94% wt). Sintaneously the refined carbazole products with high purity (over 91%) were obtained by means of distillation and recrystal, The method this paper describes is in practive.

选用焦化厂自产中间馏分作为溶剂、先用第一溶剂从粗蒽中提取蒽和咔唑中间产品,确定分离的最佳方案。再用第二溶剂分离蒽和咔唑,找出制取精蒽(纯度高于94%)的条件。结合蒸馏、重结晶方法提取精制咔唑产品(纯度高于91%)。本方法使用溶剂可循环,具有产品质量好、回收率高、生产成本低等特点。

 
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