Studies on Synthesis and Biological Activities of Novel Triazole Compounds Containing 1,3-Dioxolane

IntroductionTriazole compounds have attracted muchattention having been used as high efficient andwide spectrum fungicide and plant growthregulator[1— 4] .The triazole compounds containtintg1 ,3- dioxolane have the remarkable prevention ofthe control over plant diseases[5] .Propiconazol anddifenoconazole are two important representatives.But the necessary intermediate for synthesizingpropiconazol depends on imports,which leads tothe cost of production and application too high.According to th…     

Design, Synthesis, and Activities of Novel Derivatives of Isophthalamide and Benzene-1, 3-disulfonamide

Introduction Themeritsofantiplatelettherapyforthepreven tionofthrombosisincardiovasculardiseaseareevi dent.Meta analysisresultshaveshownthatsecondary preventionbyantiplateletaggregationagentscanreduce theriskofnonfatalmyocardialinfarction(MI)and strokeby2…     

关于相对论的若干近代实验的介绍

一、引言关于相对论的实验,近年来非常活跃.因为科学技术的发展,使得实验的精密度已不是以往经典光学方法的10~(-8),而有可能提高好几个数量极.目前看得出的,对相对论实验影响最大或     

A versatile nano-TiO_2 decorated gel separator with derived multi-scale nanofibers towards dendrite-blocking and polysulfide-inhibiting lithium-metal batteries

In this study,a versatile fluorine-bearing gel membrane with multi-scale nanofibers was rationally designed and synthesized via facile one-step blend electrospinning of nano-titanium dioxide(TiO₂)particles and fluorinated poly-m-phenyleneisophthalamide(PMIA)polymer solution.The prepared multiscale TiO₂-assisted gel separator presented relatively high porosity,small aperture,giving rise to superior affinity to electrolyte and sufficient active sites to accelerate lithium ions migration.Meanwhile,the asfabricated multifunctional GPE also rendered outstanding heat-resistance and well-distributed lithiumions flux,and the mutual overlaps between the coarse fibers and the fine fibers within the multi-scale nanofiber membrane provided a strong skeleton support,which in turn laid a solid footing stone for high-security and dendrite-proof batteries.Particularly,the nano-TiO₂ particles within PMIA membrane acted as"gatekeepers",which can not only resist the growth of lithium dendrites,but also intercept the dissolved polysulfide on cathode side.Based on these merits,the gel PMIA-based lithium cobalt(LCO)/lithium battery obtained the remarkably improved rate capability and cycle performances on account of superior ionic conductivity,steady anodic stability window and weakened polarization behavior.Meanwhile,the resultant lithium-sulfur cell also delivered the outstanding cycling stability with the aid of the greatly prevented"shuttle effect"of dissolved lithium polysulfides based on the physical trapping and chemical binding of the prepared GPE to polysulfides species.This work proved that the addition of functional inorganic nanoparticles similar with TiO₂ in multi-scale gel PMIA membrane can enhance the lithium ions transport capability,resist the growth of lithium dendrites as well as inhibit the shuttle effect of polysulfides,which would prompt a great development for dendrite-blocking and polysulfideinhibiting lithium-metal cells.     

冷冻固化红细胞膜的ESR波谱

本文介绍了两种获得红细胞膜ESR谱的方法。第一种是采用冷冻干燥红细胞膜、图谱是在室温条件下测得;第二种是选用冷冻固化新鲜红细胞膜样品。两种方法得到的ESR谱都显示出随磁场取向的各向异性,这很可能是由于细胞膜之间的磁相互作用所引起的。在图谱中出现的g=2.0062信号是由于超氧离子自由基激发产生的其他自由基信号。     

Stereocomplex Formation of Atactic Poly(methyl mcthacrylate)

Ithasbeenknownthatmixingofsyndiotacticandisotacticpoly(methylmethacrylate)(PMMA)hopolymersinsomesuitablesolventscanformstereocomplexesbytheverderWaalforcebetweenthesyndiotacticandisotacticsegments',butwhetherstereocomplexcouldbeformedina-PMMAhasbeenstillapuzzle'-'.Inthispaper,wewishtofindoutwhethera-PMMAcouldformstereocomplexes,andtherelationshipbetweenstereocomplexationandannealingconditionswasalsodiscussed.FTIRspectraofthea-PMMAfilms,preparedbycastfromacetone,benzeneandchloroformsolu…     

A WAVELET METHOD FOR BENDING OF CIRCULAR PLATE WITH LARGE DEFLECTION

A wavelet method for solving strongly nonlinear boundary value problems is described, which has been demonstrated early to have a convergence rate of order 4, almost independent of the nonlinear intensity of the equations. By using such a method, we study the bending problem of a circular plate with arbitrary large deflection. As the deflection increases,the bending behavior usually exhibits a so-called plate-to-membrane transition. Capturing such a transition has ever frustrated researchers for decades. However, without introducing any additional treatment, we show in this study that the proposed wavelet solutions can naturally cover the plate-membrane transition region as the plate deflection increases. In addition, the high accuracy and efficiency of the wavelet method in solving strongly nonlinear problems is numerically confirmed, and applicable scopes for the linear, the membrane and the von Karman plate theories are identified with respect to the large deformation bending of circular plates.     

The Dynamic Behaviour Analysis of Up－Conversion Luminescence in ErP_5O_（14） Glass

ＴｈｅＤｙｎａｍｉｃＢｅｈａｖｉｏｕｒＡｎａｌｙｓｉｓｏｆＵｐ－ＣｏｎｖｅｒｓｉｏｎＬｕｍｉｎｅｓｃｅｎｃｅｉｎＥｒＰ_５Ｏ_（１４）ＧｌａｓｓＴｈｅＤｙｎａｍｉｃＢｅｈａｖｉｏｕｒＡｎａｌｙｓｉｓｏｆＵｐ－ＣｏｎｖｅｒｓｉｏｎＬｕｍｉｎｅｓｃｅｎｃｅ...