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The coexistence curves and light scattering data for a critical solution of benzonitrile + octane have been reported. The critical exponents relating to the difference in the density variables between two coexisting phasesβ, the osmotic compressibilityγ, and the correlation length v have been deduced and the values were consistent with the 3D-Ising value in the range close to the critical point. The experimental results of the coexistence curves have also been analyzed to examine the Wegner correction terms and the behavior of the diameter of the coexistence curves.

用折射率法和不同角度的光散射法测量了苯甲腈+正辛烷二元体系在临界温度附近的-共存曲线和一相区不同温度下的渗透压缩系数及关联长度,得到与共存曲线相关的临界指数β,与渗透压缩系数相关的的临界指数γ和与关联长度相关的的临界指数γ,发现在近临界点体系符合3D-Ising模型,讨论了共存曲线直径和Wagner校正项。

The fraction of benzyl benzoate and fluorenone were enriched from benzoic acid residua by flash distillation,then separated by vacuum batch distillation,so the recovery of benzoic acid residua was implemented.

依据相关文献确定了通过闪蒸法富集苯甲酸釜残中的苯甲酸苄酯和芴酮馏分,其后减压间歇精馏分离富集馏分,实现了苯甲酸釜残的回收利用。

From the functional relationship between the flooding gas and liquid velocities derived from the two-film theory based on the Bernoulli equation,two parameters which are relative to the packing property were investigated.

根据从双膜理论出发由Bernou lli方程得到的泛气速与速之间的函数关系,考察了两个与填料有关的模型参数:一个是由填料比表面积a和床层空隙率ε所组成的填料因子a/3ε,另一个是本文定义的填料结构参数。

The contents of bile acid were measured in the supernatant and the sediment of different concentrations of calcium solution.

测定不同浓度钙消化的上清和沉淀物中胆汁酸的含量。

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂滴连续变形的装置,用此装置可以方便地改变非圆对称谐振腔的几何参数,为ARCs的研究提供了一种有效的实验方法;研究了ARCs中活性模式数和变形参数间的变化规律,激光阈值的数值计算结果和激光辐射的实验结果作了比较,二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因;在由单元化合物构成的微型圆对称谐振腔中,首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号,获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱;在由二元混合物构成的微型圆对称谐振腔中,用染料的激光增益增强了少量化合物的SRS信号,把少量化合物的SRS信号探测浓度降低了近一个数量级,在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索;用石英毛细管形成的稳定拄构成拄形谐振腔,降低了激光诱导等离子体光谱需要的激励能量,有效地降低了水相样品的痕量元素分析极限,为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

5 kinds of paddy soil treatments were studied, then each microorganism biocoenosis was extracted or bacterial strain was dissociated. Artificial synthesis ferric oxide was considered only electron acceptor, which inoculated soil leaching liquor or bacterial strain with reduction function in mineral salt culture system under anaerobic constant temperature condition. After different temperature treatments towards leaching liquor, temperature was controlled and AQDS added into culture system in order to discuss the effect of temperature and AQDS on ferric oxide microorganism reduction process.

采用5种水稻土为供试材料,分别提取微生物群落或分离铁还原菌株;以人工合成氧化铁作为惟-电子受体,在无机盐培养体系中接种土壤浸提或具有铁还原功能的菌株,厌氧恒温培养;通过对接种的不同温度处理(40, 50, 60, 70℃)、对培养温度的控制(30和50℃)以及向体系中添加AQDS,探讨温度及AQDS对氧化铁微生物还原过程的影响。

Objective To assay the carcinogencity of water and organic extracts of birch wood dust.

目的 检测桦木尘水提取和有机提取的致癌性。

It was found out that the evaporator shutter and the blocking of top separator by the biuret were the direct reasons for standard exceeding.

分析尿素装置水解解吸工艺冷凝超标的原因,确认蒸发器百叶窗及顶部分离器缩二脲堵塞是造成此次工艺冷凝超标的直接原因,并据此提出防范措施,减少同类事故的发生。

The velocity distribution curve by numerical computation near the wall is the same as the Blasius theoretical curve, and it approved that the numerical simulative solution is correct. Obtained the time dependent interface and pressure distribution, but also obtained the time dependent velocity distribution on the cross section. It is a new way to study the gas-liquid two-phase flow.

直接数值模拟圆管中气两相分层流动不仅能得到相界面、压力分布随时间的变化情况,而且能得到圆管中各截面上速度分布随时间的变化情况,这为研究管道中气两相流动提供了一个新的研究方法。

The oocytes were divided into slow-freezing group and vitrification group, according to the cryopreservation methods. And then the vitrification group was divided into self-made up solution group and commercial solution group, and the survival rate, fertilization rate, cleavage rate and blastulation rate of all groups were compared.

根据冷冻方法分为程序化冷冻组和玻璃化冷冻组,又将玻璃化冷冻组分为自配冷冻组和成品冷冻组,比较各组存活率、受精率、卵裂率及囊胚形成率。

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