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1、XX大學(xué)畢業(yè)論文外文文獻(xiàn)外文文獻(xiàn)ThezeinstudyprogressAbstractThispaperintroducesthecompositionofthezein,zeinextraction,bleaching,andtheapplicationofresearch.Keywords:zeinprotein;;applicationZein(zein)1821isolatedfromcorn,andfromthishasbeentheconcernofscientists.However,b
2、ecauseofthelackoflysine,tryptophanandotheressentialaminoacids,soitsbiologicalvalue.Gliadininsolubleinwaterlimitsitsapplicationinfood.Aresoldaslow-valuefeedprotein,only200U.S.dollarspertonontheinternational,thedomesticpriceof2,500yuan.Gliadinhydrophobic,h
3、asastrongheatresistanceandlipid,proteinproline,alanine,leucine,gliadinfilmformation,adhesion,gelresistanceExteriorfeatures,entericandantioxidantcharacteristics.Inthefoodindustry,zeincanbeusedasafilmformer,thatistosprayacoatingisformedinthesurfaceofthefoo
4、d,moisture,oxidation,therebyextendingtheshelf-life.Sprayedonthefruit,butalsoincreasethegloss.Inaddition,butalsothelong-termfordrugcapsule.Therefore,thedevelopmentofnewusesofgliadintogetmoreandmoreattentionofresearchersathomeandabroad.Zeincanbeextractedfr
5、omcornflour,canalsobeextractedfromcorncornresidueaftertheseparationofstarchandthelowcostofthelatter.Extractedfromcornresiduegliadincommercialproductionbeganin1939.CurrentglobalzeinproducedmainlybytheUnitedStatesandJapan,accordingtothepurityof$1040perkilo
6、gram.Zeinisaproductofhighcommercialvalue,butChinaalsofailedtoformthescaleofproduction,lessrelatedresearch.ThispaperdescribesthenewprogressmadeinrecentyearszeinInstitute.1.ThecompositionofthezeinZein,cornproteins,includingbothalphaandbeta.alpha-Zaincanbed
7、issolvedinthevolumefractionof95%ethanolsolutionofalpha-Zainhistidine,arginine,proline,methioninecontentofless.beta-Zaincanbedissolvedinavolumefractionof60%ethanolsolution,duetotheunstablebeta-Zainnature,pronetoprecipitationandsolidification,isnotsuitable
8、forindustrialproduction.Therefore,theindustrialproductionofcommonlyusedalpha-Zain.2.Extractionofzeinextractedwithethanol,isopropanolextractionandultrasonicextraction.7XX大學(xué)畢業(yè)論文外文文獻(xiàn)Ethanolextractionmethodisusedmore.Theethano
