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Methods:The Caco-2 cell monolayer model was used to study the bi-directional transport of daphnetin and the effects of time,temperature,pH,drug concentration and P-gp inhibitor on the daphnetin absorption.Drug concentration was measured by HPLC and the apparent permeability coefficients were calculated.
采用Caco-2细胞单层模型研究祖师麻甲素的摄取和跨膜转运,采用HPLC法检测药物浓度,计算其表观渗透系数,考察时间、温度、pH值、药物浓度以及P-gp抑制剂对祖师麻甲素吸收的影响。
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According to the resolution of the transmitted and reflected coefficients when the normal incident P-wave propagates to the nonlinear normal deformative joint,the expression between the intensity variation of the EME and the parameters of the joint is obtained.
依据电磁波与入射应力波之间的关系及应力波在非线性节理面处的透反射解,获得应力波作用下产生的电磁波在非线性法向变形节理面前后的幅值关系。
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The results are in good agreement with the experimental results.(2) According to the obtained relation between electromagnetic wave and incident stress wave and the resolution of the transmitted coefficients in the joint,the strength variation of the EME before and after the joint when the normal incident stress wave propagates to the linear deformative joint has been presented.
2依据所得到的电磁波与入射应力波之间的关系及应力波在节理面处的透射解,获得垂直入射应力波作用下产生的电磁波在线性变形节理面前后的强度关系。
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Being Compared contact angle changes of various adhesives on different surface of Moso bamboo and Chinese fir with the coefficients of penetrability, it was found that wettiability of polymeric diphenylmethane diisocyanate adhesive was much better than emulsion polymer isocyanate adhesive, wettiability of phenol-formaldehyde adhesive and urea-formaldehyde adhesive were in the middle of above two adhesives.
通过研究不同胶粘剂在毛竹表面的接触角变化,并结合胶粘剂渗透扩散系数,发现聚异氰酸酯胶在竹材表面的润湿性较好,而双组分乳液型聚异氰酸酯胶的表面润湿性较差,酚醛树脂胶和脲醛树脂胶润湿能力处于二者中间。
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It is an extraction and separation system of potential industrial applications.This dissertation studies on the liquid-liquid equilibrium of water/ ethanol/ isobutanol system in detail, and investigated the partition coefficients for dipotassium glycyrrhizinat in the system.
本文对由水+乙醇+异丁醇组成的水+混合溶剂萃取体系的液液相平衡关系做了较为详细的研究,并探讨了该体系对甘草酸二钾的萃取分配规律。
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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。
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The activity coefficients presented in Tables 4 and 5 indicate that the dipropyl ether (1)+ 2-ethoxyethanol (3) system shows positive deviations from ideal behaviour and that the 1-propyl alcohol (2)+ 2-ethoxyethanol (3) system exhibits no deviation from ideal behaviour and no additional azeotropes are present.
表4和表5所示的活度系数表明,&二丙醚+2-乙氧基乙醇&体系与理想模型表现出正偏差而&1-丙醇+2-乙氧基乙醇&体系则无偏差,并且不存在其他共沸物。
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For the models by MMFI is a nonlinear differential equation with variable coefficients and the 'nonlinearity' brings discommodiousness to analyse the nature and quantification of a control system, it applies brim linearization method to better MMFI. By transforming 'triangle wave' membership functions of the base elements into 'rectangle wave' membership functions, we get three models which represent different aspect respectively. By simulating second order system and analysing the errors of the results, a conclusion is drawn, that is, the model obtained by brim linearization method has a good precision in contrast with the real model.
由于模糊推理建模法得到的模型是变系数非线性微分方程,这种&非线性&对该控制系统的某些定性或定量分析带来不便,因此应用边缘线性化方法对模糊推理建模法进行改进,将基元的隶属函数由&三角波&改成&矩形波&,从而得到了三个模型,这三个模型各有侧重,通过对二阶系统进行仿真,分析仿真结果,从而给出了关于边缘线性化方法的结论,即由边缘线性化方法得到的系统模型对该系统的真实模型有较高的逼近精度。
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The results showed that new type structure of organic phase containing inorganic phase between polyimide and titania particle by bond conjunct was formed.The discomposing temperature was decreased with the increasing of TiO2 contents,and the thermal stability was better than polyimide materials under the temperature of 450℃.The pore size increased with the increasing of TiO2 contents,and pore size distribution tended to disperse.The permeability of N2,H2 and CO2 across the membrane were controlled by Knudsen diffusion,and the memebrane exhibited outstanding hydrophilicity since their permeation coefficients of H2O/N,are higher than the Knudsen diffusion values.
结果表明,杂化膜材料形成了有机相包裹无机相的交联结构;聚酰亚胺与二氧化钛粒子形成了新型键联结构;其热分解温度随二氧化钛含量的增加而降低,在 450℃以下热稳定性优于聚酰亚胺膜材料;平均孔径随二氧化钛含量增大而增大,孔径分布趋于弥散;N2、H2和CO2在膜内渗透由Knudsen扩散控制,H2ON2分离因子均大于Knudsen扩散值,表现出良好的亲水性。
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By that, the dissymmetric of the skew t-Copula and the influence by the free degrees, correlate coefficients are saw.
通过模拟结果可以清楚看到非中心t-Copula的非对称性以及Copula函数的自由度,相关系数对所描述的相关程度的影响。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。