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1、洋葱微波干燥特性研究李升升徐怀德1叫李链金2,土静I(1.西北农林科技大学食品科学仃丁程7院,咏西杨凌712100:2•泰祥対柏II东海洋食品汗养研究院,山东荣成264309)摘要:研究不冋微波功帑下洋葱的十燥特性。綃来衣明:与热风十燥相比,微波十燥所需吋间短,花119W和231W条件下十燥时间分别是80X?热风十燥时•间的0.35借和0.125fA;为微波功纟大于385W时,洋葱发心祸变,H.功率越高,祸变越严恥功率为119W和231W时,祥葱SE木不发‘I®}变。复水实验农明:功率为119W和231W吋,洋葱的复水比局.英复水比分别为4.87和4.
2、67。洋葱微波十燥过程1妥处于旧速期,苴数学模型符APage〃程。关键词洋葱:微波十燥:十燥特性:数学模型:品质MicrowaveDryingCharacteristicsofOnionLISheng-sheng1•XUHuai-de1E-mail:xuhuaide@yahoo.com.cnLIYu-jin2收稿LI期:2009-11-09基金项冃:陕西省农业科技攻关课题(2007K01・10・2)作者简介:李升升(1984—),男,硕I:研究T,研允力向为果品、蔬菜贮濒与加T。E-mail:lishshxn@yahoo.cn通信作者:徐怀{*(196
3、4-).另,副教授.木科.研究力向为•果品、M菜贮減与加丁,天然产物提収。WANGJing1(1.CollegeofFoodScienceandEngineering,NorthwestA&FUniversity,Yangling712100,China;2.OceanFoodNutritionResearchInstituteofShandongTaixiangGroup,Rongcheng264309,China)Abstract:Theaimofthepresentstudywastoinvestigatethedryingcharacteris
4、ticsofonionundervaryingmicrowavepowers.Theresultsshowedthatmuchshorterlengthoftimewasrequiredformicrowavedryingwhencomparedtohotairdrying・Thelengthsoftimerequiredformicrowavedryingat119Wand231Wpowerswere().35timesand0.125timesshorterthanthoserequiredforhotairdryingat80"C.Underth
5、econditionofmicrowavepower383W,onionbegantobecomebrown.Undertheconditionofmicrowavepowerabove385W,increasingmicrowavepowercouldresultinmoreseriousbrownofonion・However,undertheconditionsof119Wand231W,brownphenomenararelyoccurred.Inaddition,therchydrationratiosofonionunder119Wand2
6、31Wwere4.87and4.67,respectively,higherthanthoseunderothermicrowavepowers.ThemicrowavedryingofonionprovedtobeaconstantspeedprocessanditsmathematicalmodelwasinlinewithPageequation.Keywords:onion;microwavedrying;dryingcharacteristics:mathematicalmodel:quality小图分类弓:TS255.5文献标识码:A文章t
7、fl:1002-6630(2010)11-0047-04洋&(AlliumcepaL.)属百合科葱属草木植物,富含营养物质,含有丰富的硫化合物、黄能、苯丙素、帑体电甘、前列腺素炎咎牛理活性物质⑴,被誉为“菜屮皐.侨”。汗葱全球产就仅次于也红柿,约占蔬菜总昴io%;我国冬地均有种植,n■•接仪川或深加丁产品有干制洋葱、洋葱酱、洋葱粘油等*叫干制洋葱储运方便、莒养丰富,深受消费者欢迎。微波干燥为种快速、热效率高、无污染的干燥方式,在伐品、稻谷、果蔬等方rfri的研究已有人最的报道,如花椒【叭筋枝⑸、南瓜片⑹、菠妙叶纤维【门、苹果脆片⑻等的微波卡燥。有关洋葱
8、干燥的研究已有相关的报道.“旭加⑼、樊九[®、王俊鸽⑴】分别报逍了洋葱的貞空远红外干燥、貞空干