Fundamentals of Forest Products Chemical Processing知到智慧樹期末考試答案題庫2024年秋東北林業(yè)大學(xué)

FundamentalsofForestProductsChemicalProcessing知到智慧樹期末考試答案題庫2024年秋東北林業(yè)大學(xué)Dependingonthenatureofcellulosicmaterials,celluloseaerogelsincludecellulosederivative-basedones,regeneratedcellulose-basedones,andnanocellulose-basedones.

A:對B:錯

答案:對Whentwoobjectsatdifferenttemperaturesarebroughtintothermalcontact,heatflowsfromtheobjectatthehighertemperaturetothatatthelowertemperature.

A:錯B:對

答案:對Thebasicflavonoidstructureistheflavannucleus,whichconsistsof15carbonatomsarrangedinthreerings(C6-C3-C6).

A:錯B:對

答案:對HydrothermalwasfirstusedbytheBritishgeologistSirRoderickMurchison(1792-1871)todescribetheactionofwateratelevatedtemperatureandpressure,inbringingaboutchangesintheearth’scrustleadingtotheformationofvariousrocksandminerals.

A:錯B:對

答案:對Momentumtransfertakesplacebetweenthefluidelementswhicharemoving

atdifferentvelocities.

A:錯B:對

答案:對Biochemicalpretreatmentismainlyusedtoovercomerecalcitrantmaterialandincreasesurfaceareatooptimizecelluloseaccessibilitytocellulases.

A:錯B:對

答案:對Thedegreeofassociationbetweenligninmoleculesdecreasedwithdecreasingionizationofthecarboxylicgroupinthelignin.

A:錯B:對

答案:錯ThemostcommoncellulasegroupsproducedbyT.reeseithatcleavetheβ-1,4-glycosidicbondsareβ-glucosidase,endoglucanasesandexoglucanases.

A:對B:錯

答案:對Thebleachingstepisnecessaryinthepulpingandpapermakingprocess.

A:錯B:對

答案:錯Pretreatmentwithdiluteacidhaslittleeffectonlignin.

A:對B:錯

答案:錯Whenheatingaliquidinatest-tube,weneedpointthetest-tubeawayfromotherpeople.

A:錯B:對

答案:對ThelignincontentwasestimatedbythegravimetricKlasonprocedure.

A:對B:錯

答案:對Intheprocessofliquid-liquidextraction,theliquid-mixturefeedandsolventaremiscible.

A:對B:錯

答案:錯Filtrationisaprocessusedtoseparatesolidsfromliquidsusingafiltermediumthatallowsthefluidtopassthroughbutnotthesolid.

A:對B:錯

答案:對Polyphenolsaregenerallywater-insolublecompounds.

A:對B:錯

答案:錯Typicallyphotosynthesisconverts10%oftheavailablesunlighttostored,chemicalenergy.

A:對B:錯

答案:錯Aprimaryalcoholcanbeoxidizedtoanaldehyde,anditcan'tfurtheroxidationyieldsacarboxylicacid.

A:錯B:對

答案:錯Theradicalpolymerizationofvinylicmonomersontoligninhasbeenusedtopreparelignin-graftcopolymersbya‘‘graftingfrom”procedure.

A:對B:錯

答案:對Therearethreecommonstatesofmatter:gaseous,liquid,andsolid.

A:錯B:對

答案:對O2isacompound.

A:錯B:對

答案:錯Modificationsonhydroxylgroupscanleadtotheformationofpolyolderivativesoflignin.

A:錯B:對

答案:對Heartwoodisoftendarkerthanthesapwood.

A:對B:錯

答案:對Inwood,thenaturalstateofcellulose,calledcelluloseII.

A:對B:錯

答案:錯Gelationisnotanessentialstep.

A:對B:錯

答案:BInsomecases,momentum,heat,andmasstransferalloccursimultaneously.

A:錯B:對

答案:對Oncethepastereachesthedesiredconsistency,it’sovertoacomputerizedsystemthatregulatesthetemperatureofthepasteasanaugermixesit.

A:對B:錯

答案:A:對Adecompositionreactionisonewhereacompoundbreaksdownintosmallerandlesscomplexelementsorcompounds.

A:對B:錯

答案:AFurfuralisexclusivelyproducedfromlignocellulosicbiomassbydehydratingpentose.

A:對B:錯

答案:對Themechanismsbywhichtheheatmayflowarethree:conduction,convection,andradiation.

A:錯B:對

答案:對Theseparationofthecomponentsofaliquidmixturebytreatmentwithasolventinwhichoneormoreofthedesiredcomponentsispreferentiallysolubleisknownasliquid-liquidextraction.

A:錯B:對

答案:對It'snoteworthythatabout30percentofallfurfuralproducedisconvertedtofurfuralalcohol.

A:錯B:對

答案:錯Inreactionwithlime,thecolorofthejuicedoesnotchange.

A:錯B:對

答案:BThecharcoalbriquettewasinventedin1993.

A:錯B:對

答案:錯Depolymerizingligninusingpyrolysisdidnotrequirethesolventforthereaction.

A:錯B:對

答案:對Generally,therearegenerallytwomainapproachesforlignindepolymerization:pyrolysis,oxidationandhydrotreating.

A:對B:錯

答案:A:對Ioniccompoundsareconnectedbyionicbonding.

A:錯B:對

答案:對thewoodcellconsistsmainlyofcellulose,hemicelluloses,andlignin.

A:錯B:對

答案:AHardwoodisalwaysharderthansoftwood.

A:對B