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Dołączył: 26 Paź 2010
Posty: 796
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Temat postu: uggs online Quaternary ammonium polymer grafted ce |
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Quaternary ammonium polymer grafted cellulose fibers - Sterilization Mechanism
RYAMMONIUMSALT (QAS) GRAFTEDCELLULOSEFIBER - PREPARATIONANDANTI. BACTEIUALFUNCTIoNLUDiannan, ZHOUXuanrong, XINGXiaodong, WANGXiaogong,[link widoczny dla zalogowanych], LIUZheng (DepartmentofChemicalneering, TsinghuaUniversity, Beijing100084) AbstractSurfacecontactdisinfectingtechniqueisanewlydevelopedmethodforwatersterilization. Anexperimentalprotocoltoelucidatetheanti-bacterialprocessandmechanismwasproposedandappliedtoanovelsurfacecontactdisinfectantmadeofcellulosefibergraftedwithDMAE-BC,[link widoczny dla zalogowanych], usingE. Coli, asamodelbacterium. Theminimuminhibitionconcentration (MIC) ofthemonomer, definedasaconcentrationatwhichthegrowthofE. Coli. inwateriscompletelyinhibited, Wasdeterminedbytheplatecountingmethod. MICWasthenusedasanindextocharacterizedisinfectioncapabilityofthemonomers. Thedisinfectionmechanismofthemonomerwasfurtherinvestigatedbymeasuringtheactivityof Lu-galactosidaseandobservingthecellmorphologywithascanningelectronmicroscope (SEM). Toelucidatethedisinfectionprocessandmechanismofthegraftedfiber, thesteadystateanddynamicadsorptionofE. Coli. onthefiberWasexamined, respectively. TheTrc-dehydrogenaseactivityandrespirationactivityofE. Coli. adsorbedonthefibersurfacewerealsodetermined. TheresultsshowedthatthesterilizationprocesythegraftedfiberWascomposedoftwosteps, inwhichtheadsorptionofE. Coli. bacteriaonthefibersurfacedrivenbyelectrostaticinteractionWasafastprocessandcell-lysisWasarelativelyslowprocess. KeywordsDMAE-BC, Polycationicsurfacecontactantibacterialmaterial, Antibacterialkinetics, Innermembranepermeability,[link widoczny dla zalogowanych], Kineticpenetration, Anti-bacterialmechanism
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