基于Flash cs3 AS的大学物理CAI课件开发

本文阐述了Flash cs3 AcdonScript课件的优势及如何利用Flashcs3中具有的强大编程功能的AetionScript脚本语言制作大学物理CAI课件。     

利用傅立叶变换红外光谱法检测一氧化氮纯气中的氧化亚氮杂质

利用傅立叶变换红外光谱法对一氧化氮纯气中的氧化亚氮进行了定性和定量分析。实验结果显示,在恒定条件下进样,分辨率为0.5cm^-1,扫描512次,选择2270～2130cm^-1范围内的特征吸收进行定量分析时可以得到良好的分析结果。利用双点法对氧化亚氮杂质进行定量计算;并对分析结果进行了严格的不确定度评定,为一氧化氮纯气中氧化亚氮的检测提供了一个全新的方法。     

Graphene wrapped phthalocyanine: Enhanced oxidative desulfurization for dibenzothiophene in fuel

Graphene wrapped metal phthalocyanine (MPc/RGO, M = Mn²⁺, Fe²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺) composites are synthesized by a facile ‘in situ hydrothermal’ method, using graphene oxide, M (CH₃COO)₂ and phthalic anhydride as the precursors. A biomimetic catalytic system of MPc/RGO and molecular O₂ have high activity for ultra‐deep removal of dibenzothiophene (DBT) in model oil containing n‐octane. Compared with pure graphene oxide and MPc, MPc/RGO composites displayed highly enhanced catalytic activity for the oxidation of dibenzothiophene in n‐octane. The conversion ratio of DBT was up to 97.51% after 180 min treatment at 60 °C and atmospheric pressure. The photostability of RGO/MPc composites photocatalystic degradation of dibenzothiophene was investigated. Mechanistic studies revealed that the RGO/MPc ? O₂ · species were the main active intermediate via the π‐π stacking interaction of MPc and RGO. The RGO wrapped phthalocyanine materials offer great potential as active photocatalysts for degradation of thiophene derivatives in fuel.     

OSCILLATION AND NON-OSCILLATION FOR SECOND-ORDER QUASI-LINEAR DIFFERENCE EQUATIONS

Some oscillation and non-oscillation criteria for second-order quasi-linear difference equations are given. The results in Zhang and Zhou [4] are improved.     

强流脉冲相对论电子束加速器：—闪光二号

本文介绍了在西北核技术研究所建成的一台低阻抗脉冲电子束加速器——闪光二号。它主要用于核辐射效应模拟。加速器系统由Marx发生器、水介质同轴线和二极管三大主机部件以及十几个配套设备所组成。文中给出了在允电电压±55kV和±70kV两个电压等级下调试和运行的结果。最大输出电流600kA,管电压1.2MV。目前该加速器已用于电子束和X射线的实验研究。     

Synthesis and Characterization of Both Enantiomers of a Chiral C_(60) Derivative Bearing the 1, 1'-Binaphthyl Group

Followingthedevelopmentoffullerenefunctionalization',therehasbeenanincreasinginterestinthesynthesisofchiralfullerenederivativesfortheirpotentialapplicationintheareasofpharmaceuticalsandoptics'~'.Introductionofchiralityfromthechiralsubstituenttothefullerenecore3hasbeenestablishedtobeoneofthemostversatilemethodsforthechiralfullerenederivatives.Inthisway,chiralweresynthesizedbyVasellaetap.ThesynthesisandCDspectraoffullerene-peptideswerereportedbyPratoandco-workers',aswellasDiederich'sgroup'.Rec…     

Polarization of Lidar Returns from Water Clouds: Calculations and Laboratory Scaled Measurements

The main features of a Monte Carlo code developed to deal with polarization of lidar returns from water clouds in multiple scattering regime are described. The paper presents an example of results pertaining to a stratified cloud structure, and a series of comparisons of calculation results with measurements carried out in the laboratory. For double scattering a comparison of Monte Carlo results with those of an analytical formula is also given.Presented at the 7th International Workshop on Multiple Scattering Lidar/Light Experiments (MUSCLE7), July 21–23 1994, Chiba, Japan.     

ON A PERIODIC VOLTERRA EQUATION WITH SEVERAL FINITE DELAYS AND AN INFINITE DELAY

The existence of positive periodic solutions for a periodic Volterra equation with several finite delays and an infinite delay is established. Sufficient conditions for the periodic solutions having global attractivity are obtained.     

Hydrothermal Carbonization of Microalgae (<Emphasis Type="Italic">Chlorococcum</Emphasis> sp.) for Porous Carbons With High Cr(VI) Adsorption Performance

Polygonum tinctorium Lour (indigo plant) has been regarded as a useful medicinal plant for traditional herbal medicine. The polyphenolic fraction of indigo leaves exhibited anti-inflammatory activities as determined by the suppressed synthesis of nitric oxide (NO) in cultured RAW264 macrophage cells. The acid hydrolysate of the fraction showed much more potent effect than the unhydrolyzed one. In sharp contrast, those fractions of indigo stems had almost no effect. 3,5,4′-Trihydroxy-6,7-methylenedioxyflavone (TMF)-O-glycosides and tryptanthrin were detected exclusively in the extracts of the leaves. The isolated flavonol species were furthermore tested for their anti-inflammatory activities against the synthesis of NO and prostaglandin E₂ in the cultured macrophage cells. More potent anti-inflammatory effects were recognized with different aglycones of flavonols than their flavonol O-glycosides. Although the inhibitory effects of TMF were less effective than those of tryptanthrin, the levels of flavonol O-glycosides with TMF were much more abundant than those of tryptanthrin in the leaves. Oral administration of the fraction containing flavonol O-glycosides with TMF into mice revealed the detection of free TMF in the blood circulation, indicating that the aglycone moiety can be cleaved by digestive enzymes and absorbed in the gut. Alternatively, the assay of hydrophilic oxygen radical absorbance capacity revealed that the isolated species of flavonol O-glycosides with TMF and their aglycone had appreciable antioxidant activities. Taken together, our findings suggest that the predominant flavonol O-glycosides with TMF as an aglycone could be promising natural agents for the application to herbal medicine, nutraceuticals, and food additives.