简介:在本文中,作者研究了一种特殊的Banach空间,即Orlicz函数空间LM的子集A要构成LN-弱序列紧集合的充分必要条件是什么,给出了第一判别充要定理.
简介:证明了正则空间中闭Lindelof映射逆保持序列式meso紧性,从而改进了MancusoVJ关于正则空间中完备映射逆保持meso紧性这一结果;进一步我们指出定理条件中原象空间的正则性不可被省略而象空间的正则性可以用原象空间的正规性来替代.
简介:Objective:Tofabricatepolymericnanocompositeswithexcellentphotoluminescence,magneticproperties,andstabilityinaqueoussolutions,inordertoimprovespecificityandsensitivityofcellularimagingunderamagneticfield.Methods:FluoridatedLn3+-dopedHAP(Ln3+-HAP)NPsandironoxides(IOs)canbeencapsulatedwithbiocompatiblepolymersviaamodifiedsolventexaction/evaporationtechniquetopreparepolymericnanocompositeswithfluoridatedLn3+-HAP/ironoxide.Thenanocompositeswerecharacterizedforsurfacemorphology,fluorescencespectra,magneticpropertiesandinvitrocytotoxicity.MagnetictargetedcellularimagingofsuchnanocompositeswasalsoevaluatedwithconfocallaserscanningmicroscopeusingA549cellswithorwithoutmagneticfield.Results:Thefabricatednanocompositesshowedgoodstabilityandexcellentluminescentproperties,aswellaslowinvitrocytotoxicity,indicatingthatthenanocompositesaresuitableforbiologicalapplications.Nanocompositesundermagneticfieldachievedmuchhighercellularuptakeviaanenergy-dependentpathwaythanthosewithoutmagneticfield.Conclusion:Thenanocompositesfabricatedinthisstudywillbeapromisingtoolformagnetictargetedcellularimagingwithimprovedspecificityandenhancedselection.