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1、僳鮮ScienceandTe&nologrofFoodIndustry低溫液體速凍對軟殼三疣梭子蟹凍藏期問肌肉生化特性的影響黃剛,婁永江,王春琳(寧波大學(xué)海洋學(xué)院,浙江寧波315211)摘要:為明確低溫液體速凍對軟殼三疣梭子蟹的保鮮效果,通過對持水力、pH、TBA值、肌動球蛋白鹽溶性、Ca“一ATPase活性、巰基含量等理化指標(biāo)的測定,研究了軟殼三疣梭子蟹經(jīng)一25、一35和一50℃液體速凍處理后在一20~C凍藏過程中生化特性的變化情況。結(jié)果表明:隨著貯藏時間的延長,三個處理組的pH先減小后增大,TBA值持續(xù)上升,其他指標(biāo)皆呈現(xiàn)逐漸下降的趨勢,
2、且在貯藏期前60d內(nèi)肌動球蛋白鹽溶性及Ca一ATPase活性差異不顯著(P>0.05),但之后開始出現(xiàn)顯著差異(P<0.05);在貯藏30d后,三個處理組的巰基含量快速下降且差異顯著(P<0.05),一25~C處理組極顯著低于一5O℃處理組(P<0.01)。綜合分析各項指標(biāo)可知液體速凍溫度越低,軟殼梭子蟹在凍藏過程中肌肉品質(zhì)下降越小。關(guān)鍵詞:軟殼梭子蟹,速凍,凍藏,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中圖分類號:TS254.4文獻標(biāo)識碼:A文章編號:1002—0306(2014)l1—0328—05doi:10.13386/j.issnl002—0306.2014.11.064三疣梭子蟹(P
8、ortunustrituberculatus)屬甲殼綱、更兼難以獲取,所以經(jīng)濟價值很高。由于軟殼梭子十足目、梭子蟹科,俗稱梭子蟹、白蟹、膏蟹,地方名蟹的水分含量很高