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乙醇

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The results indicated that both binary interactive parameters of water/isobutanol system from this work and the parameters of water/ethanol from literature can be used to precdict the liquid-liquid equilibria of water/ethanol/isobutanol. But the parameters of ethanol/isobutanol from the literature were not appropriate for the prediction. Furthermore, the model parameters from 30℃ can can be used to predict the liquid-liquid equilibria under 35 ℃. The model parameters of water/isobutanol are independent on the temperatures, so constant parameters irrelative to temperature can meet prediction accuracy. Othmer-Tobias/Bancroft equation was also used to fit the liquid-liquid data of water/ethanol/isobutanol system, but it didnt possess the performance of predicting the liquid-liquid equilibria.The partition coefficients of dipotassium glycyrrhizinat were determined in the liquid-liquid two-phase system of water/ethanol/isobutanol and corrected by experiential equation.

结果表明:由本文的二元液液相平衡实验数据关联得到的水+异丁醇体系的相互作用参数和文献上由二元气液相平衡数据关联得到的水+乙醇体系的相互作用参数都具有预测三元液液相平衡关系的能力,而文献上由二元气液相平衡数据关联得到的乙醇+异丁醇体系的相互作用参数不具有预测三元液液相平衡关系的能力;可以用从30℃三元液液相平衡数据关联回归得到的模型参数来预测35℃时的液液相平衡关系;水+异丁醇的相互作用参数与温度关系不是很密切,计算时取与温度无关的常数即能满足关联精度要求;Othmer-Tobias和Bancroft经验方程可用于水+乙醇+异丁醇两相体系的液液相平衡关系的关联计算,但这类经验方法并不具有预测能力。

For the fermentation coupled with distillage recycle,every five days,the total backset distillage collected was directly used to mix the corn powder,and the experimental results revealed that the concentrations of ethanol,residual reductive sugar,inorganic phosphate and total solids in the broth were maintained s.

实验结果表明,在稀释速率0.05 h-1,废糟液全循环条件下,装置达到稳定状态后,乙醇、残还原糖、无机磷、无机氮、蛋白和总固型物浓度分别稳定在9.4%、26 g/L、11 g/L、3.36 g/L、0.136 g/L和85 g/L左右;乙醇浓度与对照组相差不大,但残还原糖、无机磷及总固形物在废糟液循环使用的初期出现积累,但随运行时间的延长而趋于稳定,说明对酵母生长和乙醇发酵没有产生明显影响。

The fatty acid synthetase inhibitor is extracted from fleeceflower vine with polar organic solvent and/or water, preferably 40-60 % concentration ethanol solution.

本发明的脂肪酸合成酶抑制剂是用有机溶剂或水或有机溶剂与水的混合物,从中药首乌藤中萃取出的物质。所述的有机溶剂为极性有机溶剂,其中,优选的是乙醇,最优选的是20%-70%的乙醇,更优选的是40%-60%的乙醇

Five Co-B amorphous alloy catalysts were prepared by chemical reduction in different media, including pure water and pure ethanol as well as the mixture of ethanol and water with variable ethanol content. Their catalytic properties were evaluated using liquid phase furfural hydrogenation to furfuryl alcohol as the probe reaction.

采用化学还原法在不同介质中制备了5种Co-B非晶态合金催化剂,反应介质包括水、乙醇以及不同乙醇含量的乙醇-水混合溶液,并以液相糠醛加氢制备糠醇为探针反应考察了其催化性能。

Methods The inhibitory effects of Taurine (50 mmol·L-1) on glycolaldehyde (0.1 mmol·L-1) induced DNA damage in spleen lymphocytes of mice were studied in vitro using single cell gel electrophoresis,and 2,4-dinitrophenylhydrazine measurement was used to detect quantitatively the effects of Taurine on carbonyl compound contents in a reactive system.

采用单细胞凝胶电泳技术检测牛磺酸(50 mmol·L-1)对乙醇醛(GA, 0.1 mmol·L-1)所致小鼠脾淋巴细胞DNA损伤的抑制作用,并用2,4-二硝基苯肼法定量检测牛磺酸对反应体系中乙醇醛含量的影响,同时设乙醇醛阳性对照组和PBS阴性对照组。

The optimum synthetic conditions of hexadecanoic acid diethanolamide used two-step method are as follows:(1)reaction temperature was 140℃, reaction time was 4.5hours and molar ratio of hexadecanoic acid to diethanolamide was 1:1.15.(2)reaction temperature was 80℃, molar ratio of hexadecanoic acid to diethanolamide was 1:1.55 and mass concentration of the catalyst was 0.8%, reaction time was 3 hours.

二步法合成十六酸二乙醇酰胺最佳合成工艺为:(1)反应温度140℃、反应摩尔比n十六酸∶n二乙醇胺=1∶1.15、反应时间4.5h;(2)反应温度80℃、反应总摩尔比n十六酸∶n二乙醇胺=1∶1.55、催化剂用量0.8%、反应时间3h。

To isolate Jasminum flavonoids, it took an investigation to the effect of various conditions in extraction. The result was with EtOH concentration 70%, temperature 75℃, extraction time 4h and the ratio of solution to liquid 1:15.The studies implemented macroporous resin to enrich Jasminum flavonoids.

在茉莉花干黄酮的提取工艺研究中,以乙醇水溶液为溶剂,考察了不同乙醇浓度浸提液、不同浸提时间,不同浸提温度和不同料液比对茉莉黄酮提取效果的影响,通过正交实验确定了茉莉黄酮的最佳提取工艺为乙醇浓度70%,温度75℃,提取时间为4h,固液比为1:15。

The stimu- lating effect of glycine on nitrate reduction was greatly influenced by preillumination treat- ment of tobacco leaves,and also by the activity of respiratory chain.

乙醇酸脱氢酶主要存在于低等植物如藻类巾;在高等植物中,乙醇酸的氧化主要是由乙醇酸氧化酶催化的,形成乙醛酸和H言02,但没有还原剂的生成L19,。

Thirdly, the precipitation phenomena and pH-curves of the compressed COi-ethanol-water system with BSA or lysozyme were studied, and it was found that: BSA would precipitate when pH of solution decreased close to isoelectric point, and the precipitate would redissolve when pH decreased further.

蛋白质分子结构数据表明,乙醇还在一定程度上改变了蛋白质分子的表面结构,这影响到了蛋白质的缓冲能力等特性,从而乙醇对加压CO_2-乙醇-水-蛋白质多元体系的pH变化有降低的作用,这使体系可处理的蛋白质浓度较加压CO_2-水-蛋白质体系大幅度提高。

According to the results, the germicidal efficacy was influenced by the concentration of ethanol, concentration of Tryptone Soy Brothculture medium and contact time of bacatericide. The optimal treatment for inhibition of the growth of pathogenic bacteria bioflims by ethanol was: ethanol concentration of 70%, contact time of 40 min and in 0%TSB.

实验结果表明,乙醇浓度、胰酶大豆肉汤培养基浓度、作用时间均能影响抑制病原菌生物被膜,乙醇抑制生物被膜细菌生长的最佳条件为:乙醇浓度70%,处理时间40 min,TSB浓度为0。

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