红外线灯泡光谱辐射特性的研究

本文研究了市售的、广泛被用于科研、工业、医疗卫生和家用电器的国产和进口的红外线灯泡，波长范围为０．３５￣０．８５μｍ和１．７２￣１６．７μｍ（５８００￣６００ｃｍ＾－１）处的光谱辐射特性，并作了比较。为它们的应用、改进设计和制造工艺、提高质量和性能，提供了理论和实验上的依据。     

Ideals and Filters in Pseudo-Effect Algebras

In this paper, we show that the filters and local filters are equivalent in pseudo-effect algebras. Ideals and local ideals and generalized ideals are equivalent in the pseudo-effect algebras, too.     

Investigation of the concentration dependence of mass transfer coefficients in reversed-phase liquid chromatography

In order to investigate the concentration dependence of mass transfer coefficients in RPLC, experimental breakthrough curves obtained by staircase frontal analysis (FA) were fitted to the simplified models such as multiplate (MP) model, equilibrium dispersive (ED) model, and transport model, and the sophisticated models such as lumped pore diffusion (POR) model and general rate (GR) model. The MP model was used to obtain the initial guesses of the parameters of the ED and the transport models. Then the best values were obtained by minimizing the differences between theoretical and experimental values with a nonlinear fitting procedure. The values of the parameters of the POR and the GR models can be calculated by using the expressions derived from the plate height equations, which was further validated by using the fitting method. It was found that the mass transfer coefficients would depend on the solute concentration. This can be ascribed to the surface diffusivity, which correlates with the concentration and is lumped into the mass transfer coefficients for both simplified and sophisticated models.     

一个药物作用肿瘤生长自由边界问题整体解的存在唯一性

该文研究一个描述药物作用下肿瘤生长的数学模型,这个肿瘤模型是对Jackson模型的一个改进,其数学形式是由一个二阶非线性抛物型方程与两个一阶非线性偏微分方程组耦合而成的自由边界问题.通过运用抛物型方程的L~P理论与一阶偏微分方程的特征方法,并利用Banach不动点定理,证明了该问题存在唯一的整体经典解.     

A lower bound on the fidelity between two states in terms of their trace-distance and max-relative entropy

Fidelity is a fundamental and ubiquitous concept in quantum information theory. Fuchs–van de Graaf’s inequalities deal with bounding fidelity from above and below. In this paper, we give a lower bound on the quantum fidelity between two states in terms of their trace-distance and their max-relative entropy.     

Prenylated indole alkaloids and chromone derivatives from the fungus Penicillium sp. SCSIO041218

Four new prenylated indole alkaloids (1–4), and four new chromone derivatives (7–10), together with six known compounds (5, 6, and 11–14), have been isolated from the mangrove sediment derived fungus Penicillium sp. SCSIO041218, cultured in the 1% NaCl PDB substrate. The structures of new compounds were determined by analysis of the NMR and MS spectroscopic data. The absolute configuration of the prenylated indole alkaloids were elucidated based on the comparison of ECDs with known analogues. The absolute configurations of the chromone derivatives were determined by time-dependent density functional theory calculations of the ECD spectra. In all of these isolated compounds, penixanthones A and B (12 and 13) exhibited antiallergic activities in vitro.     

L-扁桃酸金属配位分子烙印聚合物的手性分离能力

以CuⅡ-[N-(4-vinylbenzyl)]im inod iacetic ac id为功能单体、三甲氧基丙烷三甲基丙烯酸酯为交联剂、甲醇为聚合溶剂,制备了L-扁桃酸的金属配位分子烙印聚合物。用它作为色谱固定相,系统考察了流动相的pH、甲醇含量以及缓冲溶液的浓度对其手性分离能力的影响。在中性或弱碱性(pH 7~9)流动相条件下,L-扁桃酸的金属配位分子烙印聚合物对D,L-扁桃酸的手性分离效果最好;其手性分离能力随流动相中甲醇含量和缓冲溶液浓度的增大而增强。本研究的工作为在极性溶剂中制备高选择性的分子烙印聚合物提供了实践支持。     

大气中痕量气体污染物的傅里叶变换红外光谱分析

本文从两种类型的长光程气体红外吸收方法的角度，介绍了傅里叶变换红外光谱在大气痕量气体污染物分析中的应用，并评述了它的现状和发展前景。