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1、毛皮考题（Furexaminationquestions）A,therelationshipbetweenthefurandleather:similarities:animalskinsasrawmaterial,thefurisonthepremiseofpedalqualityqualified,moreimportantisquality,MAOleatherapedalquality.Thebasictheoryandprofessionaltheoryisbasicallythesame.The
2、sameprocessing.Leather:groupbatch-flooding-gotothemeat-depilation,liming,deliming,softening,pickling,tanning.Fur:setofbatch,flooding,shearing,fleshing,degreasing,softening,pickling,tanning.Difference:furproductswhicharerequiredtokeepsufficientfurisanatural
3、trend,namelyprotecthair,andaskforahairremovaloftheleatherascleanaspossible.Thefurproductioncycleislong,leatherproductioncycleisshort.Similarmaterialleatherfurproductsthanleather,furleatherrawmaterialvariety,leathermainlycattle,pigs,sheepgivepriorityto.Two,
4、theaminoacidcompositionandpropertiesofkeratin(1)thecontentofcystineandhydroxylaminoacidsaccountedfor11%and18%eachnohydroxyproline,hydroxyllysineandlittleorno.Cystineinsulfurcontainingalargenumberofdoublebond.Polaraminoacidismore,about25%,acidicaminoacidcon
5、tentishigherthanthebasicaminoacid,keratinPI=4to6.(2)theroleofthediagonalprotein:40degrees,weakacidorlowconcentrationofaciddiagonalproteinandMAOhadnosignificanteffect,andhightemperatureandhighconcentrationofacidtreatmentcanmaketheAngleofproteinpeptidebondel
6、ectrovalentbonddamage,makinghairdamageordissolved.(3)theeffectofalkalidiagonalprotein:PH=80keratinbyslightdamage.WhenthePH=10,11keratinhairfiberssignificantlychangeblond,brittle,tarnish,rough,andbaseonthehairrootsheathofhairfollicleorthebulbatthebottomofth
7、esoftkeratin,makeloosehairroot,(4)theroleofreductantdiagonalprotein:reducingagentcandestroythedoublesulfurkeys,especiallyinalkalineconditions,butthetypesofreductantandproperprocesscontrol,canbeusedforwoolfibercurvedorstraight,anddecolorizingandbleaching.(5
8、)theroleofantioxidantdiagonalprotein,keratinissensitivetooxidant,butdependingonthePHofsolutionandsolutionofthemedium,suchasH2O2underacidcondition,isnotsensitivetothedoublesulfurkey,butinstrongalkalineconditio
