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1、网络出版时间:2017-04-2612:02:55网络出版地址:http://kns.cnki.net/kcms/detail/11.1802.TS.20170426.1202.010.html不同贮藏温度对雷竹笋品质的影响112*212杨光,王丹丹,李琴,贺亮,杨波,汪奎宏(1.上海理工大学医疗器械与食品学院,上海200093;2.国家林业局竹笋工程技术研究中心,浙江省林业科学研究院,浙江省竹类研究重点实验室,浙江杭州310023)摘要:通过冻结点与含水率和可溶性固形物的关系确定雷竹笋的冻结点。以常温(25℃)为对照组,研究冷藏(4℃)、微冻(
2、﹣3℃)、冻藏(﹣18℃)不同贮藏温度对雷竹笋贮藏时间品质的影响,分析了对失重率、色差、可溶性蛋白的含量、苯丙氨酸解氨酶(PAL)和过氧化物酶(POD)的活性、粗纤维和木质素含量的影响,并通过原子力显微镜观察了不同温度对其微观结构的影响。结果表明:雷竹笋在常温和冷藏条件下贮藏时间分别为6d、18d,微冻和冻藏条件下为30d。冷冻贮藏的表皮粗糙度(Ra=30.683,Rq=40.892)高于微冻贮藏(Ra=14.516,Rq=18.517)。因此,从品质和经济效益考虑,微冻贮藏既能较好地保持雷竹笋原有风味,又能延长贮藏时间,节约成本。关键词:雷竹笋
3、;贮藏温度;微冻;贮藏时间;微观结构;EffectofdifferentstoragetemperaturesonthequalityofPhyllostachyspraecox1122112YANGGuang,WANGDan-dan,LIQin*HELiang,YANGBo,WANGKui-hong,(1.SchoolofMedicalInstrumentandFoodEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China;2.BambooShoo
4、tsEngineeringResearchCenteroftheStateForestryBureau,ZhejiangForestryAcademy,ZhejiangProvincialKeyLaboratoryofBambooShootResearch,Hangzhou310023,China)Abstract:Thefreezingpointcanbeobtainedbytheanalysisofrelationshipbetweenfreezingpointandsample’smoisturecontentorsolublesolids
5、.Sevenphysicochemicalpropertieswereselectedtoinvestigatethequalitychangesduringthedifferentstorages,whichwereweightlossrate,colorvalue,solubleproteincontent,PALactivity,PODactivity,crudefiberandlignin.Thentheeffectofcoldstorage(4℃),superchillingstorage(﹣3℃)andfrozenstorage(﹣1
6、8℃)onstoragetimeofPhyllostachyspraecoxwasconductedwiththecomparisonofroomtemperature(25℃)inthestudy.Furthermore,themicrostructureofPhyllostachyspraecoxwasobservedbyatomicforcemicroscopy.TheresultsindicatedthatthestoragetimeofPhyllostachyspraecoxintheroomstorageandcoldstoragew
7、ere6and18daysrespectively,whilethoseinthesuperchillingstorageandfrozenstoragewere30days.TheskinroughnessofPhyllostachyspraecoxduringfrozenstorage(Ra=30.683,Rq=40.892)washigherthanthatofsuperchillingstorage(Ra=14.516,Rq=18.517).Therefore,concerningtothequalityofPhyllostachyspr
8、aecoxanditseconomiceffects,thesuperchillingstoragenotonlycanbenefiti