辐照降解壳聚糖涂膜对沙糖桔-圣女果和金桔的保鲜作用-陈浩

:1000-8551(2008)05-640-05陈浩1,2高鹏1,2高雅1杨志荣1孙群1(1.,610064;2.,610066):研究了经辐照降解后的不同分子量壳聚糖对沙糖桔圣女果金桔在贮存过程中失重率腐烂率总酸可溶性固形物以及抗坏血酸的影响结果表明:降解壳聚糖处理可显著降低3种果实的失重率和腐烂率,延缓总酸可溶性固形物以及抗坏血酸含量的下降;其中,分子量为616@104Da的壳聚糖对3种水果的保鲜效果最佳,贮存18d的腐烂率较对照组分别降低71111%66101%和70122%,总酸提高55160%36175%和36168%,可溶性固形物提高49106%25175%和49146%,抗坏血酸提高42180%41165%和51170%因此,辐照降解壳聚糖能有效降低3种水果的腐烂率,延长贮存期至18d,并保持其营养品质:沙糖桔;圣女果;金桔;壳聚糖;品质;贮存期EFFECTSOFIRRADIATION-DEGRADATEDCHITOSANCOATINGONQUALITYANDSHELF-LIFEOFTHEFRUITSOFShatangMandarin,FortunellaMargariat(LOUR)SWINGLEANDLycopersiconEsculentumMILL.var.CERASIFORMEALEFCHENHao1,2GAOPeng1GAOYa1YANGZh-irong1SUNQun1(1.CollegeofLifeSciences,SichuanUniversity,Chengdu,Sichuan610064;2.SichuanInstituteofAtomicEnergy,Chengdu,Sichuan610066)Abstract:Effectsofirradiation-degradatedchiotosanofdifferentmolecularweightonweightloss,rottingrate,totalacid,solublesolidcontent,andascorbicacidinShatangmandarin,Fortunellamargarita(lour)Swingle,andLycopersiconesculentumMill.var.cerasiformeAlefduringstoragewereinvestigated.Theresultshowedthat,comparedtocontrol,allchitosantreatmentcouldsignificantlyreduceweightlossandrottingrate,andmaintainthecontentoftotalacid,solublesolid,andascorbicacid.After18daysofstorage,[e-mail],F.margarita,L.esculentumby71111%,66101%and70122%,respectively;increasingtotalacidby55160%,36175%and36168%,solublesolidcontentby49106%,25175%and49146%,andascorbicacidby42180%,41165%and51170%,respectively.Accordingly,irradiation-degradatedchitosancoatingcouldeffectivelypreventtherottingrateandpreservethequalityofthethreekindsoffruitduringstorageandthusprolongtheirshelflifeto18days.Keywords:Shatangmandarin;Fortunellamargarita(lour)Swingle;LycopersiconesculentumMill.Va.cerasiformeAlef;chitosan;storagequality;shelflife:2008-06-16:2008-07-19:(200803034),(07FG004-003):(1965-),,,,Tel:[phone];E-mail:[e-mail]:(1967-),,,,Tel:[phone];E-mail:[e-mail](Shatangmandarin),,[1];(Fortunella6402008,22(5):640~644JournalofNuclearAgriculturalSciencesmargarita(lour)Swingle),,,,,[2];(LycopersiconesculentumMill.var.cerasiformeAlef),,,VC117[3],/03,,,1~2,,CaCl2[4]B-(1,4)-2--2--D-,,,,,[5],,[6],,[7]()[8],,,3,1111,,,,,((DD)85%),100g,60CoC,050100150200kGy,35GyPmin(Co),SHIMADUZ;(0~20%),;Eppendorf5804R,Eppendorf11211211壳聚糖溶液的制备50100200kGy2918@104816@104616@104Da,35g,500ml015%,011%11212壳聚糖保鲜处理(30,50)3min,,,(15e~20e)18d;015%,303691518d11311311失重率和腐烂率的测定[9]0369121518d(15),,11312总酸含量20g,50mlCO2,[10],11313可溶性固形物10g,10ml,[11]11314抗坏血酸Vc含量10g,10ml2%,2,4-[12]1143,SASt22113,,(1)3d,;18d,49199%33133%31133%,616@104Da,314144%11133%9133%,71111%66101%70122%;816@104Da,616@104Da(P0105);2918@104Da,(P0105)64151Table1Effectofirradiatedchitosancoatingonrottingrateandweightlossrateofthefruitsstoragetime(d)chitosanMW(Da)rottingrate(%)weightlossrate(%)S1mandarinF.margaritaL.esculentumS.mandarinF.margaritaL.esculentum0CK0a0a0a0a0a0a2918@1040a0a0a0a0a0a816@1040a0a0a0a0a0a616@1040a0a0a0a0a0a3CK2122?1.92a1133?1.15a1133?1.15a2145?0.30a2145?0.30a2173?0.30a2918@1040100?0.00a0100?0.00a0100?0.00a0188?0.26b0150?0.26b1104?0.16b816@1040100?0.00a0100?0.00a0100?0.00a0121?0.05c0130?0.27b0116?0.18c616@1040100?0.00a0100?0.00a0100?0.00a0116?0.19c0120?0.11b0105?0.09c9CK12122?1.92a10100?2.00a10167?1.15a8197?0.47a8197?0.47a8136?0.86a2918@1045155?1.92b3133?1.15b3133?1.15b3199?0.42b4176?0.42b6148?0.44b816@1044144?1.92bc3133?1.15bc2167?1.15b1184?0.60c2153?0.63b3113?0.37c616@1042122?1.92c2100?2.00c2100?2.00b1169?0.24c1198?0.42c2110?0.28c15CK35155?3.85a22167?6.11a22100?2.00a21151?0.28a21151?0.28a20170?0.44a2918@10417178?5.09b12167?5.03b11133?2.31b8136?0.32b13135?0.95b17160?0.51b816@10410100?3.33c8100?2.00c9133?2.31c3165?0.53c7174?1.08c8187?0.75c616@1047178?3.85c6100?2.00c6100?2.00d3103?0.33c7105?0.28c7130?0.48d18CK49199?8.83a33133?6.43a31133?8.08a31146?0.55a31146?0.55a27167?0.80a2918@10424144?8.38b21133?1.12b17133?4.16b11155?0.59b22107?0.60b25117?0.70b816@10414144?5.09b14100?0.00c13133?3.06b5164?0.49c10164?0.62c12166?1.34c616@10414144?1.92b11133?3.06c9133?3.06c5106?0.33c9153?0.51c12102?0.53c:0105Note:Thedatafollowedbysamecommonsmalllettersindicatednosignificantat0105.18d,31146%31146%27167%,616@104Da3,5106%9153%12102%,83192%69171%56160%;816@104Da,616@104Da(P0105);2918@104Da,(P0105)2123,(2)18d,10%30112%26188%,616@104Da,3,4144%19105%17102%,55160%36175%36168%;816@104Da,616@104Da(P0105);2918@104Da(P0105)(),2Table2Effectofirradiatedchitosancoatingontotalacidofthefruits(%)storagetime(d)chitosanMW(Da)S.mandarinF.margaritaL.esculentum0CK0190?0.01a0183?0.01a0193?0.01a2918@1040191?0.01a0183?0.01a0193?0.00a816@1040190?0.00a0183?0.00a0194?0.00a616@1040190?0.01a0184?0.00a0194?0.00a3CK0189?0.01a0178?0.00a0191?0.01a2918@1040190?0.01a0181?0.00b0191?0.01a816@1040190?0.00a0182?0.00c0193?0.00a616@1040190?0.01a0182?0.01c0193?0.00a9CK0188?0.00a0173?0.01a0185?0.01a2918@1040188?0.00a0176?0.00b0185?0.01a816@1040189?0.00a0177?0.01b0190?0.00b616@1040190?0.00b0178?0.01b0190?0.01b15CK0183?0.00a0164?0.01a01