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concentration
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  浓度
    THE EFFECT OF UREA ON FOLIN-CIOCALTEU'S METHOD DETERMINING PROTEIN CONCENTRATION
    尿素对Folin-Ciocalteu法测定蛋白质浓度的影响
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    The DETERMINATION of BEAR ORIGINAL WORT CONCENTRATION USING DIPPING REFRACTOMETER
    浸入式折光计测定啤酒原麦汁浓度
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    Determining CO_2 Concentration in Crop Populations by Spectrophotometric Analysis
    测定作物群体内CO_2浓度的分光光度计法
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    Quick measurement of the Concentration of fhe Sericin Protein by colorimetric method with Coomassie Brilliant Blue G-250 as Colorimetric liquid
    考马斯蓝G-250比色法快速测定丝胶蛋白质浓度
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    The Molecular Inclusion Compound and Its Application in Bleaching by Using Active Chlorine of High Concentration
    分子包结化合物在高浓度有效氯漂白中的应用
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  浓缩
    Study on Purification and Concentration of Gardenia Yellow by Ultrafiltration Method
    超滤法栀子黄精制和浓缩研究
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    Remaking of Dairy Concentration System
    乳品厂浓缩系统的改造
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    The Concentration Technique to Treat Molasses Alcohol Wastewater
    糖蜜酒精废水浓缩治理技术
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    Study on Liquid Concentration
    流体浓缩试验研究
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    Agricus bisporus,being soaked with 70% acetone,extracted with n-butanol,analyzed with HPLC-20 column,purged with ethands of different concentration;
    蘑菇经70%丙酮浸提,正丁醇萃取,经HPLC-20柱层析,用不同浓度乙醇梯度洗脱、浓缩、冷冻干燥后得物质A、B、C、D、E、F。
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  “concentration”译为未确定词的双语例句
    A Study of Recovery Iodine From Formation Water with Low Iodine Concentration
    从川南低矿化度气田水中提碘研究
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    STUDY ON THE TEST PAPER FOR QUICK DETECTION OF PHOSPHINE CONCENTRATION
    磷化氢快速检测试纸的研究
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    Effect of Ultrafiltration on Aroma Concentration of Strawberry Juice
    超滤技术对草莓汁中重要芳香成分影响的研究
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    The experiment indicates that the satisfactory fermentation results(ethanol concentration is 16.12%,survival reducing sugar is 0.22%,survival total sugar is 1.26%,starch reality ethanol productivity is 52.29%,and starch utilization ratio is 92.08%) can be achieved when the ratio of corn powder and water is 1∶1.21 and the fermentation time is 50.5h.
    当调浆料水比为1∶2.11,经过50.5 h发酵,成熟醪中酒份达到16.12%,残还原糖0.22%,残总糖1.26%,淀粉实际产酒率52.29%,淀粉利用率92.08%.
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    The macimum velocity and instant Km were determined through probing into the relation of the substrate concentration and reaction velocity: Km=0.096 9 mol·L-1,Vmax=0.003 07 mol·min-1·L-1.
    探讨了该酶催化水解赤豆蛋白反应的动力学参数:Km=0.0969 mol. L-1,Vmax=0.00307 mol.
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  concentration
More generally, these results apply both to Gabor frames and to systems of Gabor molecules, whose elements share only a common envelope of concentration in the time-frequency plane.
      
aureus in lower concentration of chloroform extract.
      
Transfersomal formulation with optimal concentration of Soya phosphatidylcholine (SPC) and sodium deoxycholate (85:15 w/w) showed entrapment efficiency of 39.8±0.032 and deformability index of 16.4.
      
None of the synthesized compounds appear to be more potent than 1 at a concentration of 10 μM.
      
Only two of the evaluated compounds (2 and 8) appeared to be allosteric enhancers at high concentration (10 μM).
      
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Litchi is a famous fruit indigenous to southern China.When the fruit is fully ripe it is beautifully bright red,but the color fades rapidly and turns dull brown a few days after being kept at room temperature.In order to find out what is the active agent responsible for the rapid browning of the fruit,a study was made of the oxidizing enzy- mes present in the fruit shell.Crude enzyme preparation was made by grinding fruit shells with water or with phosphate-citric acid buffer (pH 6.8) and then filtering.Enzy-...

Litchi is a famous fruit indigenous to southern China.When the fruit is fully ripe it is beautifully bright red,but the color fades rapidly and turns dull brown a few days after being kept at room temperature.In order to find out what is the active agent responsible for the rapid browning of the fruit,a study was made of the oxidizing enzy- mes present in the fruit shell.Crude enzyme preparation was made by grinding fruit shells with water or with phosphate-citric acid buffer (pH 6.8) and then filtering.Enzy- me activity was measured by manometric method with the Warburg apparatus. An enzyme was found which can oxidize catechol and hydroquinone at pH 6.8,but it cannot oxidize mon0phenols such as p-cresol and tyrosine.The enzyme in litchi peri- carp was thus found to resemble laccase with respect to substrate specificity.Enzyme activity was much reduced at pH values below 6.8,being about one-half at pH 6.2 and about one-fourth at pH 5.0 as that at pH 6.8.Boiled fruit shell extract still had some oxidizing activity toward hydroquine,presumably due to the presence of some thermostable factors capable of oxidizing polyphenols in the crude extract. Copper chelating agents such as thiourea and sodium diethyldithiocarbamate (dieca) had peculiar effects on this enzyme.The enzyme from fruit shells of the variety“Bai-la- zi”(白蜡子)was inhibited by thiourea in only a short period.The inhibition gradually diminished and totally disappeared within 20-80 minutes.The degree and duration of inhibition varied with the concentration of thiourea,the higher the concentration,the greater the degree and the shorter the time of inhibition would be.After the inhibition has disappeared,absorption of oxygen continued to increase to an amount higher than that of the control,resulting in a stimulation effect.No inhibition was shown by thio- urea to the enzyme from fruit shells of the variety“Huai-zhi”(淮枝),which was sti- mulated by thiourea at the very beginning of oxidation reactions.Dieca inhibited the enzyme at low concentration (0.2mM).At higher concentrations (2 or 4mM) dieca gave a stimulation effect;the absorption of oxygen was markedly enhanced in the pre- sence of dieca (2 or 4mM) as compared with that of the control.The increase of oxygen uptake in the presence of thiourea or dieca was not due to the direct oxidation of these reagents by the enzyme.Further studies are being carried out to make clear the nature of these effects.

本文报告在荔枝果皮中有多酚氧化酶存在,但荔枝果皮提取液在经煮沸后仍有部分的氧化对苯二酚的活性。在 pH4.0—6.8范围内,酶活性以在 pH6.8中为最强。此酶对邻苯二酚及对苯二酚均起氧化作用,但不能氧化间苯二酚及一元酚(对-甲酚和酪氨酸)。故从基质特异性来看,荔枝果皮的多酚氧化酶与漆酶相类似。抑制剂如硫脲及二乙胺基二硫代甲酸钠对荔枝果皮多酚氧化酶具有特殊的作用。硫脲对白蜡子荔枝果皮多酚氧化酶只呈暂时的抑制作用,以后抑制作用逐渐消失并转为促进作用,抑制时间及促进程度随浓度而异。硫脲对淮枝荔枝果皮多酚氧化酶则不呈抑制而只呈促进作用。低浓度(0.2mu)的二乙胺基二硫代甲酸钠对荔枝果皮多酚氧化酶呈抑制作用,但高浓度(2,4mM)则有强烈的促进作用。

Physiological injury of tomato during storage appears under oxygen partial pres- sure lower than 1%,presumably due to fermentation.The critical value of oxygen partial pressure for effective inhibition of tomato post-maturation is around 7% at 13—27℃ The optimum oxygen partial pressure for prolonged storage of tomato at 12—13℃ is around 2—4%,and the peak of respiration is delayed.Maturation can be accelerated,if the oxygen partial pressure is raised to 40—50%. Application of Ethrel under 0—1% oxygen at 27℃ is...

Physiological injury of tomato during storage appears under oxygen partial pres- sure lower than 1%,presumably due to fermentation.The critical value of oxygen partial pressure for effective inhibition of tomato post-maturation is around 7% at 13—27℃ The optimum oxygen partial pressure for prolonged storage of tomato at 12—13℃ is around 2—4%,and the peak of respiration is delayed.Maturation can be accelerated,if the oxygen partial pressure is raised to 40—50%. Application of Ethrel under 0—1% oxygen at 27℃ is ineffective in accelerating maturation.Acceleration of maturation due to increase in respiration can be indueed by raising the oxygen partial pressure above 2%. CO_2 enrichment may inhibit post-maturation of tomato but may cause fruit injury at the same time.Both effects of CO_2 can be antagonized by properly raising oxygen concentration.

贮藏番茄的气体中,氧分压低于1%时,产生生理损伤。在13—27℃的温度下,7%的氧分压是不能抑制番茄后熟的临界值。在12—14℃的温度下,2—4%的氧分压是长期贮藏番茄的最适条件,可以推迟呼吸高峰的到来。氧分压高到40—50%有一定的催熟作用。乙烯利在27℃和氧分压为0—1%的条件下,没有催熟作用。当氧分压高于2%时,有催熟作用,并可诱导呼吸高峰的提前出现。适当浓度的 CO_2对番茄的后熟有抑制作用,浓度过大则产生毒害作用。CO_2抑制后熟的作用和对番茄的毒害作用与 O_2分压有拮抗。在一定浓度的 CO_2条件下,提高氧分压可减弱CO_2对后熟的抑制和减轻 CO_2对番茄的生理毒害。

The feces of silkworm was found containing extracted chlorlphyll 0.8-1.0% and carotenoid about 0.15%.The feces of silkworm was extracted with acetone, the concentration of acetone had to be controlled at the range of 83-85%. During the removing of the solvent, the temperature of the liquid should be controlled not to exceed 85癈. The crude extract was about 5-6% of the feces of silkworm.Two methods of manufecturing sodium copper chlorophyllin from the crude chlotlphyll were used. The crude extracts were...

The feces of silkworm was found containing extracted chlorlphyll 0.8-1.0% and carotenoid about 0.15%.The feces of silkworm was extracted with acetone, the concentration of acetone had to be controlled at the range of 83-85%. During the removing of the solvent, the temperature of the liquid should be controlled not to exceed 85癈. The crude extract was about 5-6% of the feces of silkworm.Two methods of manufecturing sodium copper chlorophyllin from the crude chlotlphyll were used. The crude extracts were saponified and then extracted with gasoline to remove the nonsaponifiable fraction. The soap was acidified to pH 3 and the copper chlorophyllic acid was obtained by treating it with copper sulfate , then filtered. The residue was dissloved in acetone and convererted into alkali salt by treating with sodium hydroxide. The product, when dry,is known as sodium copper chlorophyllin . Another method was to treat with copper sulfate after saponification.Sodium copper chlorophyllin can be used as medicine for gastric uloer, burna, chronic persistent hepatitis and peplic ulcer.The nonsaponif iable fraction was found containing phytol, triac-ontanol and carotenoid. The phytol can be used as an intermediate for the manufacture of vitamine E and K1;the triacbntanol is a plant growth regulator and can increase the rice yield by spraying on the leaves.

蚕粪是提取叶绿素的良好原料,含量达1%(干物)。用丙酮抽提后回收溶剂可得到糊状叶绿素,得率约5%。加碱皂化后,在酸性条件下与硫酸铜作用生成叶绿素铜酸,再与氢氧化钠反应成为叶绿素铜酸钠盐。可用于治疗慢性、迁延性肝炎,胃、十二指肠溃疡及外用;又可作食用色素。 蚕粪还可提取类葫萝卜素,植物醇和正十三烷醇。植物醇供作合成维生素E及K_1的原料,正三十烷醇是植物生长刺激素,能促进水稻秧苗及白菜的生长。

 
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