简介：Cadmium(Cd)ishighlytoxictoplants,animals,andhumans.Limitedinformationisavailableontheroleofnitricoxide(NO)and/or24-epibrassinolide(EBR)inresponseofplantstoCdstress.Inthisstudy,ahydroponicexperimentwasperformedtoinvestigatetheeffectsofNOand/orEBRonpeanutplantssubjectedtoCdstress(200μmolL-1)withsodiumnitroprusside(SNP,anexogenousNOdonor)(250μmolL-1)and/orEBR(0.1μmolL-1)addition.TheresultsshowedthatCdexposureinhibitedplantgrowth,andthisstresswasalleviatedbyexogenousNOorEBR,andespeciallythecombinationofthetwo.TreatmentwithCdinhibitedthegrowthofpeanutseedlings,decreasedchlorophyllcontent,andsignificantlyincreasedtheCdconcentrationinplants.Furthermore,theconcentrationofreactiveoxygenspecies(ROS)markedlyincreasedinpeanutseedlingsunderCdstress,resultingintheaccumulationofmalondialdehyde(MDA)andprolineinleavesandroots.UnderCdstress,applicationsofSNP,EBR,andespeciallythetwoincombinationsignificantlyreducedthetranslocationofCdfromrootstoleaves,increasedthechlorophyllcontent,decreasedtheconcentrationsofROS,MDA,andproline,andsignificantlyenhancedtheactivitiesofsuperoxidedismutase(SOD),peroxidase(POD),andcatalase(CAT)inpeanutseedlings.ExogenousNOand/orEBRalsostimulatedtheactivitiesofnitratereductase(NR)andnitricoxidesynthase(NOS)andincreasedthecontentsofantioxidants,suchasascorbicacid(AsA)andreducedglutathione(GSH).Furthermore,exogenousNOand/orEBRenhancedCdaccumulationinthecellwallandthusdecreasedCddistributionintheorganellesintheroots.Theconcentrationsofcalcium(Ca),iron(Fe),magnesium(Mg),andzinc(Zn)werealsoregulatedbyexogenousNOorEBR,andespeciallybythetwoincombination.TheseresultsindicatedthatSNPandEBR,aloneandparticularlyincombination,canmitigatethenegativeeffectsofCdstressinpeanutplants.

简介：Understandingofcharge/energyexchangeprocessesandinterfacialinteractionsthatoccurbetweenquantumdots(QDs)andthemetaloxidesisofcriticalimportancetotheseQD-basedoptoelectronicdevices.Thisworkreportsonlineardipolebehaviorofsinglenear-infraredemittingCdSeTe/ZnScore/shellQDswhichareencasedinindiumtinoxide(ITO)semiconductorlianoparticlesfilms.Astrongpolarizationanisotropyinphotohiminescenceemissionisobservedbydefocusedwide-fieldimagingandpolarizationmeasuremen11echniques,andtheaveragepolarizationdegreeisupto0.45.Apossiblemechanismfortheobservationispresentedinwhichtheelectrons,locatingatsingleQDsurfacefromITObyelectrontransferduetotheequilibrationoftheFermilevels,resultinasignificantStarkdistortionoftheQDelectron/holewavefunctions.TheStarkdistortionresultsinthelinearpolarizationpropertyofthesingleQDs.TheinvestigationoflineardipolebehaviorforsingleQDsencasedinITOfilmswouldbehelpfulforfurtherimprovingQD-baseddeviceperformance.

简介：Pillar[n]arenesareanewkindofsupramolecularmacrocyclichostswhichhavedevelopedrapidlyduetotheiruniquetopologyandhighfunctionality,givingrisetomanyapplicationsintheconstructionofinterestingandfunctionalmaterials.Amongthem,water-solublepillar[n]arenesbearingtriethyleneoxide(TEO)chainshavedrawnincreasingresearchinterestduetotheiradvantageousproperties.Inthisreview,wesummarizedtherecentprogressofdynamicmaterialsfabricatedfromwatersolublepillar[n]arenesbearingTEOgroups,includingthermoresponsivematerialswithlowercriticalsolutiontemperature(LCST)behavior,cyclichostliquids,andsmartwindows.Itisanticipatedthatmoreandmore‘smart’supramolecularmaterialsbasedonmodifiedpillar[n]areneswillbedevelopedinthisburgeoningareaofresearch.

简介：Trimetallicpalladium-copper-cobaltnanoparticlessupportedonreducedgrapheneoxide(PdCuCo/RGO)withdifferentmolarratiosofPd,CuandCocanbesynthesizedbyfacilechemicalreductionwithNaBH4asreductantandcetrimoniumbromideasstabilizer.Themorphology,structureandcompositionoftheas-synthesizedcatalystsarecharacterizedbytransmissionelectronmicroscopy,X-raydiffractionandXrayphotoelectronspectroscopy.Thecyclicvoltammetryandchronoamperometryareutilizedtoinvestigatetheelectrochemicalactivitiesandstabilitiesoftheas-obtainedcatalysts.TheresultsdemonstratethatthePdCuCo/RGOcatalystshowssuperiorcatalyticactivityandstabilityformethanolelectrooxidationinalkalinemediacomparedwithPdCu/RGO,PdCo/RGO,andPd/RGOcatalysts.ThesefindingssuggestthatthePdCuCo/RGOcatalystpossessesagreatpotentialasapromisinganodecatalystfordirectmethanolfuelcells.

简介：Organicamendmentssuchasvermicompostandbiocharhavebeenreportedtoenhancesoilfertilityandcropproductivity.However,whethertheco-applicationofbothamendmentshassynergisticeffectsorwhethersuchbenefitsareaccompaniedbytheriskofgaseousnitrogen(N)lossinanagroecosystemremainsunknown.Asoilcolumnexperimentwithafullyfactorialdesignwasconductedusingthreelevelsofvermicompost(nodose,lowdose(1%,weight:weight),andhighdose(3%,weight:weight))withoutorwithbiochar(1%,weight:weight)toinvestigatetheireffectsonricegrowthandgaseousNlossacrossthecropgrowingseason.Ourresultsdemonstratedthatsynergisticinteractionsexistedbetweenvermicompostandbiocharinpromotingcropyield.Comparedwithbiocharamendmentalone,biocharcombinedwithvermicompostsignificantly(P<0.01)increasedriceyieldby26.5%–35.3%.However,highdoseofvermicompostsignificantly(P<0.01)increasedthecumulativeammonia(NH3)andnitrousoxide(N2O)emissions.Inthepresenceofvermicompost,theincorporationofbiocharamendmentsignificantly(P<0.01)decreasedthecumulativeN2Oemissionby14.1%–18.6%.ThelowestemissionfactorvalueofNH3andN2Owasachievedusingbiocharincombinationwithlowdoseofvermicompost.Thisstudyrevealedthatthecombinationofbiocharandmoderatedoseofvermicompostoffersanovelapproachtopromotecropproductivitywhilereducingtheenvironmentalrisk.