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1、XX大学毕业论文外文文献外文文献ThezeinstudyprogressAbstractThispaperintroducesthecompositionofthezein,zeinextraction,bleaching,andtheapplicationofresearch.Keywords:zeinprotein;;applicationZein(zein)1821isolatedfromcorn,andfromthishasbeentheconcernofscientists.However
2、,becauseofthelackoflysine,tryptophanandotheressentialaminoacids,soitsbiologicalvalue.Gliadininsolubleinwaterlimitsitsapplicationinfood.Aresoldaslow-valuefeedprotein,only200U.S.dollarspertonontheinternational,thedomesticpriceof2,500yuan.Gliadinhydrophob
3、ic,hasastrongheatresistanceandlipid,proteinproline,alanine,leucine,gliadinfilmformation,adhesion,gelresistanceExteriorfeatures,entericandantioxidantcharacteristics.Inthefoodindustry,zeincanbeusedasafilmformer,thatistosprayacoatingisformedinthesurfaceof
4、thefood,moisture,oxidation,therebyextendingtheshelf-life.Sprayedonthefruit,butalsoincreasethegloss.Inaddition,butalsothelong-termfordrugcapsule.Therefore,thedevelopmentofnewusesofgliadintogetmoreandmoreattentionofresearchersathomeandabroad.Zeincanbeext
5、ractedfromcornflour,canalsobeextractedfromcorncornresidueaftertheseparationofstarchandthelowcostofthelatter.Extractedfromcornresiduegliadincommercialproductionbeganin1939.CurrentglobalzeinproducedmainlybytheUnitedStatesandJapan,accordingtothepurityof$1
6、040perkilogram.Zeinisaproductofhighcommercialvalue,butChinaalsofailedtoformthescaleofproduction,lessrelatedresearch.ThispaperdescribesthenewprogressmadeinrecentyearszeinInstitute.1.ThecompositionofthezeinZein,cornproteins,includingbothalphaandbeta.alph
7、a-Zaincanbedissolvedinthevolumefractionof95%ethanolsolutionofalpha-Zainhistidine,arginine,proline,methioninecontentofless.beta-Zaincanbedissolvedinavolumefractionof60%ethanolsolution,duetotheunstablebeta-Zainnature,pronetoprecipitationandsolidification
8、,isnotsuitableforindustrialproduction.Therefore,theindustrialproductionofcommonlyusedalpha-Zain.2.Extractionofzeinextractedwithethanol,isopropanolextractionandultrasonicextraction.7XX大学毕业论文外文文献Ethanolextractionmethodisusedmore.Theethano
