蒸汽漂烫菊花的薄层干燥特性和质量评价.pdf

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1、第27卷第6期农业工程学报V01．27No．62011年6月TransactionsoftheCSAEJun．2011357ThinlayerdryingcharacteristicsandqualityevaluationofsteamblanchedchrysanthemumQinShan

2、WenXuesen嚏IShenTaolXiangLan(SchoolofPharmaceuticalSciences,ShandongUniversity,Jinan250012，China)Abstract：

3、Thisarticleaimedtoinvestigatethethinlayerdryingcharacteristicsofthesteam-blanchedchrysanthemumandevaluatethequalityoftheresultingproducts．mdryingwascarriedoutatairtemperaturesof60，80，100and120"Candanairvelocityof0．5rigs．Theresultsshowedthatitwasatypical

4、processwiththecharacteristicsoffallingratedrying．anddryingratewasmarkedlyacceleratedwithincreaseoftemperature．Theprocesscouldbedlvidedintothreestages，thefirst，secondandthirdfallingratestages．andabout84％ofmoisturewasremovedinthefirstfallingratestage．Thee

5、ffectivediffusivitieswerecalculatedfrommedataofthefirstfallingratestageandrangedfrom1．10t06．44x10-’mgs．andtheactivationenergywasfoundtobe1829．5kJ／kg．Midillimodelbetterfitthedryingbehaviourofthefirstfallingratestagecomparedtotheothereightmodelsinvestigat

6、ed．Steamblanchingfor2mincombinedwithdryingat100℃or120℃wasrecommendedfortheproductionofhi曲qualitychrysanthemum．Keywords：drying，activationenergy,models，chrysanthemum，effectivediffusivity，caffeoylquinicacid，flavonoidglycoside，antioxidantactivitydoi：10．3969

7、／j．issn．1002—6819．2011．06．062(：LCnumber：R931．4Documentcode：AArticleID：1002—6819(2011、一06—0357—08QinShan，WenXuesen，ShenTao，eta1．Thinlayerdryingcharacteristicsandqualityevaluationofsteamblanchedchrysanthemum【J]．TransactionsoftheCSAE，2011，27(6)：357--364．(i

8、nEnglishwithChineseabstract)覃珊，温学森，沈涛，等．蒸汽漂烫菊花的薄层干燥特-陛和质量评价[J]．农业工程学报，2011，27(6)：357--364．0Introduc：tionDryingisanimportantmeansofenhancingresistancetodegradationbyreducingwateractivityinagriculturalproducts．Themajor010jectiveofdryingistoreducethemoistu

9、recontenttoacertainlevel，whichallowssafestorageoveranextendedperiod．Duringtheprocess，moisturecontentisreducedtothedegreeinwhichnomicrobialactivitycalloccur，anddeteriorativechemicalandbiochemicalreactionsareminimized．Easierprocess