雨课堂学堂在线学堂云《Fundamentals of Forest Products Chemical Processing（东北林业）》单元测试考核答案

第1题Generally,gumrosinisproducedbychemicalprocessingofwoodyrawmaterial.第1题Traceelementsareessentialtolife.第2题Elementswithsimilarchemicalpropertiesgenerallyfallintothesamegroupintheperiodictable.第3题Apuresubstancealwayshasthesamephysicalandchemicalpropertiesandiseitheranelementoracompound.第4题Calciumoxideisaninorganiccompounds.第5题AnychemicalspeciescapableofbindingtoelectronpairsiscalledaLewisacid;anymoleculethattendstodonateanelectronpairisreferredtoasaLewisbase.第6题Ineithercase,thepositionofthemultiplebondisindicatedbynumberingfromtheendofthechain,startingattheendthatwillassignthelowernumbertothefirstcarbonatomofthemultiplebond.第7题Etherstendtobereactive,andlowmolecularmassethersareoftenusedassolvents.第8题Ifoneorbothofthehydrogenatomsontheamidenitrogenatomarereplacedbyhydrocarbongroups,thestructureisnamedasanN-substitutedamide.第9题Bydoingresearchinchemistry,wecanfindnewcuresfordiseasesaswellasbetterchemicalstouseinournaturalenvironment.Unittesting第1题Wecaneatordrinkinlaboratories.第2题Ifaliquidgetsintoyoureyes,theeyeshouldbewashedimmediatelywithcleanrunningwaterforatleast10min.第3题Inthecaseoffirealarm,weneedstopallofyourongoingwork,turnoffgasandelectricdevices.第4题Thereisnoneedtolabelglassorflaskfilledwithsolution.第5题Ifyouworkwithflammablesolvent,makesurethereisnosourceofignitioncloseby.Unittesting第1题Fossilisedbiomasshas

beenexploitedascoalandoil.第2题Therelativedistributionofphenolicnucleiinligninstronglydiffersbetweenplantspecies.第3题Theroleofhemicelluloseistomodifyandcrosslinkthebasicfibrilsandpromotetheinteractionbetweenotherbiopolymers.第4题Softwoodsaremainlyvesselmembers,fibres,andparenchyma,andhardwoodsaremainlymadeofmadeoftracheidsandparenchyma.第5题Theouterlayer(S1)isthickerthanThemiddlelayer(S2).第6题Klasonlignin

isastandardanalyticalmethodtomeasurethelignincontentoflignocellulosicbiomass.第7题Foresterificationreactionofcellulose,theconversionwaslowandforsilynationreaction,theconversionisgoodbutwithahighcost.第8题Cellulosehasmanyhydroxylgroupswhichcanformhydrogenbondinglinkednetworkeasily.第9题Highlyporousaerogelsusuallytendtoshowhigheroil-sorptioncapacities.第10题Starchonlyhasoneforms,i.e.amylose.第11题Inadditiontoglucomannan,minoramountsofmiscellaneouspolysaccharidesarepresentinhardwoods.第12题Thesofteningtemperature(Ts)ofligninsindrystateishigherthanthatinmoistlignins.第13题Thereactivityofligninhasnothingtodowithitssolubility.第14题LigninmainlyhastwotypesoflinkagesincludingC-CandC-O-C.第15题Thenon-bondedorbitalinteractions(π-πinteractions)ofthearomaticgroupscouldcausedtheassociationofligninmolecules.第16题Thearomaticmoietiespresentintheligninstructurewillimprovethemechanicalandthermalpropertiesofepoxyresins.第17题Therearetwodifferenttypesofpolysaccharidehydrolysis,involvingacidic(sulfuricacid)orenzymaticreactions.第18题Terpeneisderivefroma5Ccompound,isoprene.第19题Polyphenolsalsocharacteristicallypossessasignificantbindingaffinityforproteins,whichcanleadtotheformationofsolubleandinsolubleprotein-polyphenolcomplexes第20题Cardanoldoublebondmaybeepoxidisedorundergoolefin-metathesisreactionwhichmayactasmodifiedmonomerfortheformationofdifferentsetofpolymers.Unittesting第1题Sodiumhydroxideandcalciumhydroxidecanbeusedinsteadofpotassiumhydroxidetoneutralizetheacid.第2题Hotairblowsintothisdryertobringthesugarshumidityleveldownto0.05percent,thatstandardfortablesugar.第3题Themainresistancetotheflowofheatormasstoasurfacelieswithinthelaminarsublayer.第4题Filtercakesareformedlateinthefluidflow.第5题Extractionmaybeusedtoseparatemorethantwocomponents;andmixturesofsolvents,insteadofasinglesolvent,areneededinsomeapplications.

第6题Heatfluxesmaythenbebasedeitherontheinsideareaortheoutsideareaofthechoiceisarbitrary.第7题Anyevaporatorthatusespumptoensurehighercirculationvelocityiscalledaforcedcirculationevaporator.第8题Ifthefeedisintroducedatonepointalongthecolumnshell,thecolumnisdividedintoanuppersection,whichisoftencalled

thestrippingsection,andalowersection,whichisoftenreferredtoastherectifyingsection.第9题Dryingisanabsolutetermthatmeansacertainvalue.Unittesting第1题Thetraditionaltechniquesofsolventextractionofplantmaterialsaremostlybasedonthecorrectchoiceofsolventsandtheuseofheator/andagitationtoincreasethesolubilityofthedesiredcompoundsandimprovethemasstransfer.第2题Theyspraytherubbercubeswithamixofcalciumcarbonateandsolventthemixtureformsthefilmonthecubesthatpreventsmoldandkeepsthemfromstickingtogetherduringtransport.第3题Biomassismostlymadeupofcarbon,hydrogen,compoundsdidnotburncalledash.第4题Biochemicalapproachesincludethreeunit-operationsnamely,pretreatment,hydrolysis,anddistillation.第5题Furfuralcanbeproducedbyaone-steporatwo-stepprocess.Theadvantageoftheone-stepprocessisthatahig