儲糧危害性霉菌在不同生理狀態(tài)下的微生物活性值變化研究.pdf

1、河南工業(yè)大學碩士學位論文儲糧危害性霉菌在不同生理狀態(tài)下的微生物活性值變化研究姓名：李振權(quán)申請學位級別：碩士專業(yè)：農(nóng)產(chǎn)品加工與貯藏工程指導教師：蔡靜平20070501AbstractMoldsalethemostharmfulmicrobeingrainInthegeneralstorageconditionthemoldsarecloselyrelatedtothechangingofenvironmentandtheirgrowing

2、processesandphysiologydevelopmentsaretmcertainSometimestheyareinallestateforalongtimewhileinothertimestheygrowrapidlywhichwouldbringgreatharmtograinstorageThroughtheexperiments，themolds’physiologyconditioncallbedividedin

3、tosuchfourstatesassporestate，sporebourgeoningstate，hyphagrowingstateandpropagatingbodyformingstateIncertainconditionsthataresuitableformoldsgrowing，thetimeofhyphagrowingislongerthaninothersstatesTheexperimentsshowthatthe

4、changeofmicrobeactivitycanshowthechangingofmolds’physiologystatesandmolds’physiologystatescanbedeterminedbyevaluatingmicrobeactivityInthestateofsporemicrobeactivityisratherlowInthestateofsporebourgeoning，changingrateofmi

5、crobeactivityislowandalwaysbelow50u／dInthestateofhyphagrowing，thechangingrateofmicrobeactivitygrowshigherthanlOOu／dInthestateofpropagatingbodyforming，thechangingrateofmicrobeactivityislowerandalwaysbelow50u／dThisresearch

6、showthatintheconditionofthes鋤ehumiditythehigherthetemperature，theshorterthetimemoldsstayinthebourgeonstateandquicklyenterintogrowingstateThetimeofmoldsenteringgrowingstatewhenthetemperatureis30℃islessthanthetimeofmoldsen

7、teringintohyphagrowingstatewhenthetemperatureis25℃and204Candthetimeare7days，14daysand21days，respectivelyIntheconditionofthe鞠metemperature，thehigherthehumiditytheshorterthetimemoldsstayinthebourgeonstateandquicklyenterint

8、ohyphagrowingstate11letimeofmoldsenteringhyphagrowingstatewhenthehumiditylocatesintheintervalofRH90％一100％islessthanthetimeofmoldsenteringintohyphagrowingstatewhenthehumiditylocatesinRH80％90％andRH70％80％andthetimeale5days，

9、15daysand20days，respectivelyIntheprocessofmoistureabsorptiondifferentsampleswithdifferentinitialmoisturecanquicklyarriveatthestatewiththesamemoistureandthetimeofdifferentsamplesarrivingatthehyphagrowingstateareequalThehi

10、gherthesamples’moisture，theshorterthetimeofmoldsintheperiodofsporebourgeonstateandtheyCallquicklyenterintothestateofhypbagrowingThetimeofmoldsenteringgrowingstatewhenthesamples’moistureis195％islessthanthetimeofmoldsenter

11、ingintohyphagrowingstatewhenthetsamples’moistureis175％and155％andthetimeale8dayslOdaysand12daysinthetemperatureof30。CrespectivelyIntheprocessofmoldsgrowing，thestateofmoldsgrowingisthemostdestructivetograinwhileinthestateo

12、fsporetherearenoharmInthestatesofsporebourgeonandpropagatingbodyforming，therewouldbeslightharmtograinForcomwith195％moistureat30“Cthevalueoffattyacidchangingis7mgKOH／lOOgandthisvalueinthestateofhyphagrowingis39mgKOH／1009a