简介：Soakedindifferentconcentrationsofholmiumnitratesolutionfordifferenttime,roottipsofViciafabawerewashedandfetched.DNAoftheroottipswasextractedandperformedagarosegelelectrophoresis.Slidesoftheroot-tipcellswerepreparedandexaminedundermicroscopeforanomalousnuclei.Meanwhile,root-tipcellswerepreparedandperformedsinglecellgelelectrophoresis.Theresultsshowthatanomalyofnucleiisinducesbyholmiumions.Theresltsalsoshowthatcomettailsarelengthenedandnumbersoftailedcellsareontheincreaseswiththeextensionofdisposalwithin24hatconcentraitionof8mg·L^-1.andthatatdisposalof24h,anobviousandcontinualtapeappearesmagarosegelelectrophoresls,butatdisposalof48h,thecomettailsareshortenedandonlyashorttailingtapeshowsinagarosegelelectrophoresis.ItmaybetheresultofDNArepairorDNAcross-link.Atconcentrationof64mg·L^-1fordisposalof24h,thecomettailsareshorterthanthoseat8mg·L^-1forthesametime.Furthermore,fracturesofnucleiwereobservedundermicroscope,butnotailingtapewasfoundinagarosegelelectrophoresis.NeithertypicalDNAladder,norcharacteristiccomettails'shapeofapoptosiswasfoundintheexperiments.

简介：TheeffectsofUVAphotoirradiatedCe(Ⅳ)dopedTiO2nanoparticle(CDTP)onratcoloncarcinomacellline(C26)growth,cellcycledistribution,andmorphologywerestudiedbyMTTassay,FlowCytometry,andfluorescentstaining.Theresultsindicatethatabout64.6%cellsarekilledafter24hby180μg·ml-1CDTPwhen8minexposedtoUVA,over90%deadfor30mingroup,relativeto18.7%,41.5%ofTiO2atthesameconditionrespectively.Hoe33258stainingofthefixedcellsrevealstypicalapoptoticstructures(apoptoticbodies),andcellsarearrestedinG0/G1phase.