Determination of kinetic parameters for both reversible and irreversible first-order reactions

The paper reviews the main recent publications concerning infrared (IR) spectroscopy as applied to the study of lipid-protein interactions in model and cell membranes, lipoproteins, and related systems (e.g. lung surfactant). The review focuses mainly on transmission IR. Based on the available data, a number of general conclusions are presented on the perturbations caused by proteins on either the hydrocarbon chains, the polar headgroups or the interface region. Lipid-protein interactions in native cell membranes do not reveal significant differences from what is observed in semisynthetic model systems.     

C/C-Cu复合材料的微观结构与冲击性能

以炭纤维针刺整体毡为增强体,采用化学气相渗透(CVI)工艺制备出不同密度的炭/炭(C/C)多孔体,利用气压浸渍法将Cu合金渗入到C/C多孔体中制备C/C-Cu复合材料。在简支梁摆锤式冲击试验机上测试C/C-Cu复合材料的冲击性能,采用金相显微镜和扫描电镜观察材料的微观结构和断口形貌。结果表明:铜合金在C/C多孔体中分布均匀;C/C-Cu复合材料垂直方向的冲击韧性优于平行方向的冲击韧性;随C/C多孔体密度的增加,材料的冲击韧性先增加后降低。C/C多孔体密度适中(1.44 g/cm3)时,C/C-Cu复合材料内炭纤维、热解炭、铜合金等组分协同作用,在平行和垂直2个方向的冲击韧性都达到最大值,分别为2.68 J/cm2和4.45 J/cm2,具有假塑性断裂行为的特征。     

Predicting adverse impact and mean criterion performance in multistage selection.

The authors present an analytical method to assess the average criterion performance of the selected candidates as well as the adverse impact and the cost of general multistage selection decisions. The method extends previous work on the analytical estimation of multistage selection outcomes to the case in which the applicant pool is a mixture of applicant populations that differ in their average performance on the selection predictors. Next, the method was used to conduct 3 studies of important issues practitioners and researchers have with multistage selection processes. Finally, the authors indicate how the method can be integrated into a broader analytical framework to design multistage selection decisions that achieve intended levels of selection cost, workforce quality, and workforce diversity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Determination of standard gibbs energies of formation of Cr2N and CrN

The standard Gibbs energies of formation of Cr₂N and CrN have been measured by an equilibration technique and by using thermogravimetry and differential thermal analysis (TG-DTA) at temperatures ranging from 1232 to 1523 K. The results are expressed as follows:

轧辊与钢板表面形貌的功能特征参数

目前普遍使用的表面形貌评定参数不能够准确反映轧辊和钢板表面的承载性能和储油性能．本文提出了二维轮廓和三维表面的功能特征参数,并给出了计算方法．通过与表面粗糙度的比较以及对电火花毛化轧辊表面形貌的分析,结果说明了表面形貌功能特征参数使表面的承载性能和储油性能分析更为具体和准确．