简介：Usingcarboxymethylchitosan(CM-CTS)assnakeresin,B-62resincrosslinkedbytriethylentetraamine(TETA)ascageresin,aseriesofnovelsnake-cagetyperesinweresynthesized.Suchfactorsasthebestsyntheticconditions,theswellingandregenerationproperties.andthesorptioncapactitiesoftheabovementionedresinsformetalionswereinvestigated.Theexperimentalresultsshowtheseresinshavegoodswellingpropertiesandmechanicalstability,anddonotrunoffinorganicandinorganicsolvents.ThesorptioncapactitiesofthemforCu^2+,Ni^2+,Zn^2+,andPb^2+were0.89,0.54,0.32,and0.22mmol/g,rspectively.

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简介：Thisstudyperformsthequantitativeanalysisandcomparisontoacousticsignalcharact,eristicsofLargcyellowcroaker(Pseudosciaenacrocea)attwodifferentages.Thesoundswercrecordedfromthefishesinanet-cage.Twoexponentialoscillationfunctionsarebuilttofittheacousticsignalofthefishes.Thesignalcharacteristicoftheoscillationfrequencyandattcnuationcoefficientwasdescribedquantitatively.Simulationcurvesofthefunctioncouldfitwellacousticsignals.Boththeaverageoscillationfrequencyandattenuationcoefficientofthefittedsignalsfromthe13-15-month-oldfishesarclowerthanthosefromthe7-8-month-oldfishes.Theresultssuggestthattheoscillationfrequencyandattenuationcoefficientoftheacollsi.icsignalfunctionmayberelevanttothephysicalproccssofsoundproductionandagecharacteristicsofLargeyellowcroaker.Thisstudymaybevaluablefortheacousticapplicationtotheartificialcultureofthespecies.

简介：Synthesisofinorganicnanostructureswithspecificsizeandwelldefinedmorphologieshasattractedconsiderableattentionduetotheirsuperiorelectrical,optical,magnetic,andchemical