溴化四-(4-N,N,N-二甲基,正庚烷基氨基苯基)卟啉钴的合成,L-B膜及其气敏、湿敏特性

卟啉和酞菁是一类大环共轭化合物,由于其结构和性能以及在生命科学中所起的作用,使得用L-B膜技术研究其结构和功能越来越引起人们的重视.自从Jones等发现原卟啉L-B膜具有较好的光导性以来,卟啉L-B膜的电导性和气体敏感特性相继有人进行过研究。     

高锰酸钾与乙酰丙酮快速反应动力学

乙酰丙酮CH_2(COCH_3)_2(简写为Hacac)是重要的有机合成中间体,也是柠檬酸在人体内代谢的中间物.为了进一步掌握柠檬酸氧化的后续变化,我组观测了前人未曾报导过的乙酰丙酮与高锰酸钾在酸性介质中的快速反应.该反应从现象上可明显分为两个阶段:第一个阶段是MnO_4~-的紫色迅速消褪,反应体系转变为浅绿色溶液;第二阶段是浅绿溶液缓慢转变为无色.其中第一阶段的反应速率相当快.我组曾研制成功CFF-751G 型连续流动法快速反应装置,本工作采用该装置对上述第一阶段的快速反应进行了动力学研究.     

啁啾光纤光栅透镜法制作技术的理论与实验研究

对利用零级抑制均匀相位掩模版结合同透镜制作啁啾光纤光栅的技术进行了详细的理论和实验研究。结果表明这种方法适合于制作啁啾参数较小的光纤光栅，当所制作的光栅啁啾参数较大时，将导致严重的光谱不对称性和包层模耦合。     

Bifurcation analysis in a diffusive Segel–Jackson model

Bifurcations of spatially nonhomogeneous periodic orbits and steady state solutions are rigorously proved for a reaction–diffusion system modeling predator–prey interaction. The existence of these patterned solutions shows the richness of the spatiotemporal dynamics such as oscillatory behavior and spatial patterns.     

The newsvendor problem: Review and directions for future research

In this paper, we review the contributions to date for analyzing the newsvendor problem. Our focus is on examining the specific extensions for analyzing this problem in the context of modeling customer demand, supplier costs, and the buyer risk profile. More specifically, we analyze the impact of market price, marketing effort, and stocking quantity on customer demand; how supplier prices can serve as a coordination mechanism in a supply chain setting; integrating alternative supplier pricing policies within the newsvendor framework; and how the buyer’s risk profile moderates the newsvendor order quantity decision. For each of these areas, we summarize the current literature and develop extensions. Finally, we also propose directions for future research.     

Criteria for the Metric Generalized Inverse and its Selections in Banach Spaces

We investigate the metric generalized inverses of linear operators in Banach spaces and their homogeneous selections, which was the research suggestion given by Nashed and Votruba (Bull. Am. Math. Soc. 80:831–835, 1974). We construct a kind of the bounded homoneneous selections for the set-valued metric generalized inverse. Criteria for the metric generalized inverses of linear operators and their homogeneous selections are given in terms of Moore–Penrose conditions. The research was supported in part by the National Science Foundation Grant (10671049) and the Science Foundation Grant of Heilongjiang Province.     

Exact multiplicity of solutions to a diffusive logistic equation with harvesting

An Ambrosetti-Prodi type exact multiplicity result is proved for a diffusive logistic equation with harvesting. We show that a modified diffusive logistic mapping has exactly either zero, or one, or two pre-images depending on the harvesting rate. It implies that the original diffusive logistic equation with harvesting has at most two positive steady state solutions.     

Exact multiplicity of solutions and S-shaped bifurcation curve for a class of semilinear elliptic equations

The set of steady state solutions to a reaction-diffusion equation modeling an autocatalytic chemical reaction is completely determined, when the reactor has spherical geometry, and the spatial dimension is n=1 or 2 for any reaction order, or n?3 for subcritical reaction order. Bifurcation approach and analysis of linearized problems are used to establish exact multiplicity and precise global bifurcation diagram of positive steady states.     

Perturbation analysis for oblique projection generalized inverses of closed linear operators in Banach spaces

In this paper, we study the perturbation problem for oblique projection generalized inverses of closed linear operators in Banach spaces. By the method of the perturbation analysis of linear operators, we obtain an explicit perturbation theorem and error estimates for the oblique projection generalized inverse of closed linear operators under the T-bounded perturbation, which extend the known results on the perturbation of the oblique projection generalized inverse of bounded linear operators in Banach spaces.     

反相流动注射化学发光法测定葡萄糖

提出使用葡萄糖增强Ｌｕｍｉｎｏｌ－Ｋ７Ｃｕ（ＩＯ６）２－ＫＯＨ化学发光体系，结合高灵敏度的反相流动注射技术进行葡萄糖的测定。本法不仅节省试剂，而且操作简单，重复性好。葡萄糖在４×１０－７～８×１０－５ｍｇ／Ｌ浓度范围内与化学发光分析信号呈线性关系；检出限为１．８Ｘ１０－７ｍｇ／Ｌ；ＲＳＤ＝２．０４％。