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时间:2020-05-01
《低温液体速冻对软壳三疣梭子蟹冻藏期间肌肉生化特性的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、僳鲜ScienceandTe&nologrofFoodIndustry低温液体速冻对软壳三疣梭子蟹冻藏期问肌肉生化特性的影响黄刚,娄永江,王春琳(宁波大学海洋学院,浙江宁波315211)摘要:为明确低温液体速冻对软壳三疣梭子蟹的保鲜效果,通过对持水力、pH、TBA值、肌动球蛋白盐溶性、Ca“一ATPase活性、巯基含量等理化指标的测定,研究了软壳三疣梭子蟹经一25、一35和一50℃液体速冻处理后在一20~C冻藏过程中生化特性的变化情况。结果表明:随着贮藏时间的延长,三个处理组的pH先减小后增大,TBA值持续上升,其他指标皆呈现逐渐下降的趋势,
2、且在贮藏期前60d内肌动球蛋白盐溶性及Ca一ATPase活性差异不显著(P>0.05),但之后开始出现显著差异(P<0.05);在贮藏30d后,三个处理组的巯基含量快速下降且差异显著(P<0.05),一25~C处理组极显著低于一5O℃处理组(P<0.01)。综合分析各项指标可知液体速冻温度越低,软壳梭子蟹在冻藏过程中肌肉品质下降越小。关键词:软壳梭子蟹,速冻,冻藏,生化特性EfectofcryogenicliquidquiCk—freezingonthebiochemicalpropertiesofsoftshellswimmingcrab(
3、PortunuStrituberculatus、muscleduringfrozenstorageHUANGGang,LOUYong-jiang,WANGChun-lin(SchoolofMarineScienceofNingboUniversity,Ningbo315211,China)Abstract:Inordertoconfirmtheeffectofcryogenicliquidquick—freezingonpreservationofsoftshellswimmingcrab.ThechangesofbiochemicaIpro
4、pertiesofsoftshellswimmingcrabmuscleduringthefrozenstorageperiod0f90daysat一20oCwithIiquidquick—freezingunder一25、一35and一50ocwerestudiedbymeasuringthesolubilityofactomyosin,一SHcontent,Ca一ATPaseactivities,WHC,pHvalueandTBAvalue.TheresultIndicatedthat:thesolubilityofactomyosin.
5、一SHcontentandCa“一ATPaseactivitiesdecreasedwithprolongingofthefrozenstorageperiodfromthetreatmentgroups;pHdecreasedfirstandthenincreased;TBAvalueascendedpersistently;inthefirst60daysofthefrozenstorageperiod,thesolubilityofactomyosinandCa“一ATPasehadnosignificantdifference(P>0
6、.05)andappearedsignificantdifferencelater(P<0.05)amongthethreetreatmentgroups.一SHcontentdeclinedrapidlyandemergedsignificantdifference(P<0.05)betweenthediferenttreatmentgroupsafter30days.Atthesametime,thegroupat一25ocwaslowersignificantlythanthegroupat一50oC(P<0.O1).Therefore
7、,thetemperatureofIiquidquick—freezingislower.theslowerdeterioratedinsoftshellswimminacrabmuscle.Keywords:softshellsw;mmingcrab;quick—freezing;frozenstorage;biochemicalproperties中图分类号:TS254.4文献标识码:A文章编号:1002—0306(2014)l1—0328—05doi:10.13386/j.issnl002—0306.2014.11.064三疣梭子蟹(P
8、ortunustrituberculatus)属甲壳纲、更兼难以获取,所以经济价值很高。由于软壳梭子十足目、梭子蟹科,俗称梭子蟹、白蟹、膏蟹,地方名蟹的水分含量很高
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