卵黃卵磷脂的提取與貯藏性能的研究.pdf

1、東北農業(yè)大學碩士學位論文卵黃卵磷脂的提取與貯藏性能的研究姓名：林淑英申請學位級別：碩士專業(yè)：食品科學指導教師：孔保華2001.6.1林淑英英文摘要2001年5月StudyontheExtractionandthePerformanceofStorageofEggYolkLecithinABSTRACTEggyolkcontainsabundantphospholipidswhosecompositionoffurnishisperfec

2、t.Extractinglecithinfromeggyolkisapotentialwayofeggdeepprocess.Twokindsofwayswereadoptedtoextractthelecithinusingeggyolkpowderasmaterialinthepresentstudyincludingethanollowtemperatureextractionandsupercriticalcarbondioxi

3、deextraction一ethanolextraction.TothewayofethanollowtemperatureweadoptedfourfactorstwotimesaturatedDoptimumexperimentdesign.Themodelwasestablished.Bythemodelwestudiedtheeffectoffourfactorsnamelyconcentration(C)，ratioofeth

4、anolandsample(R)，extractingtemperature(T)andextractingtime(t)onrateofphospholipidsextractionrateofcholesterolextractionrateoffatextractionandrateofphosphatidylcholineextraction.Theoptimumconditionofextractinglecithinfrom

5、eggyolkpowderthroughethanollowtemperaturewas:C=95%R=6:1T=40Ct30minThecontentofphospholipidwas56%.Theyieldwas30%.Comparedtheefficiencyofethanolextractionwithethanollowtemperatureitcouldbeconcludedfromefficiencythatproduct

6、qualityofethanollowtemperaturewashigherthanthatofethanolextractionbuttheyieldofethanollowtemperaturewaslowerthanthatofethanolextraction.Underthesupercriticalextractioncondition(extractingtime=180mineggyolkpowderweight200

7、gextractingoutflow=30kgfhr)，separationpressure“8MPaseparationtemperature=45Cregressionmodeloftwofactorsfivelevelstwotimerotationperpendicularregressivedesignwasadopted.ByFtestandapplicationtestthemodelwasverifiedthatitre

8、flectedtheoreticallytheintrinsiclawonthesupercriticatextractionandcoincidedwellwiththepractice.Itindicatedfromthedesignofrotationregressionthatextractingpressure(P)andextractingtemperature(T)werethemainfactorsafectedthef

9、actthatsupercriticalcarbondioxideextractionextractedlecithin.ThecontributionoftwofactorstoremovalofphospholipidsremovalofcholesterolremovaloffatwasPT.TheoptimumextractionofsupercriticalcarbondioxideextractionwasP=3536MPa