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1、ChemicalGeology391(2015)33–41ContentslistsavailableatScienceDirectChemicalGeologyjournalhomepage:www.elsevier.com/locate/chemgeoEffectsofCeO2nanoparticlesonmicrobialmetabolismaabba,⁎ShotaMasaki,HiroyukiShiotsu,ToshihikoOhnuki,FuminoriSakamoto,SatoshiUtsunomiyaaDepartmentofChemistry,KyushuUnive
2、rsity,Fukuoka812-8581,JapanbAdvancedScienceResearchCenter,JapanAtomicEnergyAgency,Tokai,Ibaraki319-1195,JapanarticleinfoabstractArticlehistory:Tounderstandtheeffectsofnanoparticlesonmicroorganisms,weexperimentallyinvestigatedtheeffectsofCeO2Received14July2014nanoparticles(CeNPs)onyeast(S.cerev
3、isiae)focusingonmicrobialmetabolitesandintracellularproteins.TheReceivedinrevisedform24October2014yeastwereharvestedfromayeastextractpeptonedextrosemediumcontaining0,10,100,and250ppmofAccepted27October2014CeNPsandincubatedfor120hin1mMNaClsolutionatthreedifferentpHvalues:3,5,and7.Theyeastreleas
4、edAvailableonline7November2014organicmatter,P,K,andMgintotheNaClsolutionatallpHvalues,evenwithoutCeNPs.DistinctdifferencesweredetectedinthereleasedorganicspeciesandintracellularproteinsafterexposuretoCeNPs.High-performanceliq-Editor:J.Feinuidchromatographyrevealedthatvariousorganicspeciesrelea
5、sedfromtheyeastwereexpressedorsuppressedKeywords:afterexposuretoCeNPs.AlthoughcytotoxicitywasnotcausedbyCeNPs,theresultsofthepeptidemassfinger-CeO2nanoparticleprintanalysisoftheintracellularproteinrevealedthatEno2p,aglycolysisenzyme,wasexpressedafterexposureMicroorganismtoCeNPs.Theseresultssugg
6、estthatnanoparticleshavethepotentialtoaltermicrobialmetabolism,leadingtoOrganicmatterchangesinthecompositionsofthereleasedsubstancesinthesurroundingenvironment.Metabolism©2014ElsevierB.V.Allrightsreserved.1.Introductionexploredinmanypreviousstudies,therelevanceandroleofnano-particlesstillremai
7、nunknown.Specifically,theinfluenceofnanoparti-Microbialactivitiesplayakeyroleingoverninglocalandglobalclesonmicroorganismsandmicrobialactivitiesispoorlyunderstood,environmentsbecausemicroorganismsareubiquitousandabundanteventhoughmicrobia
