Ua ntej nqus cov ntawv kib, cov nceb nquag xav kom tau pretreated, xws li blanching, xim tiv thaiv, maltose soaking. Txhua kauj ruam muaj nws lub hom phiaj.
1. Ntshiab
Cov nceb yog hau rau 8 ~ 14 feeb nyob rau hauv cov dej npau. Qhov no tsuas yog siv rau inactivating qhov kev ua si enzyme los tiv thaiv browning vim enzyme oxidation thaum txheej txheem frying. Nyob rau tib lub sijhawm, blanching kuj tseem tuaj yeem tshem cov nplaum ua kom khov ntawm cov nplaim tawm kom tiv thaiv cov nplaum ua ke thaum muab kib. Nws kuj tseem tuaj yeem ua kom lub hlwb ua kom lub zog sib tsoo, poob dej thiab xov tooj ntawm phab ntsa sib cais, nce lub zog permeability ntawm daim nyias nyias, txhawb cov dej ntawm cov dej hauv lub hlwb, thiab ua kom nrawm nrawm.
2. Kev Tiv Thaiv Xim
Nws tau raug pov thawj los ntawm kev xyaum hais tias ntsev muaj qee yam kev cuam tshuam thiab rhuav tshem ntawm kev ua ntawm enzyme, thiab solubility ntawm oxygen hauv brine yog me dua li ntawm huab cua, yog li nws muaj qee yam kev tiv thaiv xim. Citric acid yog cov khoom noj muaj feem ntau cov kua qaub, uas ua rau qis pH ntawm cov tshuaj kho. Yog li ntawd, cov nceb tau tiv thaiv nrog 0. 5% ntsev thiab 0. 3% citric acid, pH 3 tov.
3. Khov khov
Khov khov ua ntej txheej txheem ntawm cov nceb noj cov nceb yog cov kauj ruam tseem ceeb. Tom qab khov thiab tom qab ntawd kib, sab hauv cov dej noo dhau mus rau hauv daim ntawv ntawm qhov tawg, thiab cov qauv ntawm cov dej khov ua rau cov dej khov hloov cov qauv ntawm cov dej khov khov, uas yog cov txiaj ntsig zoo rau lub diffusion ntawm dej vapor. Cov pob khov khov no ua rau cov nplai thiab nkig, thiab tsis muaj qhov txav rau ntawm lub npoo.
4. Maltose soaking
Cov tshuaj so ntswg hauv tsev tseem muaj lub ntsiab lus lub cev qhuav dej. Qhov no ib txwm siv rau 30 Brixmaltodextrin kua ntawm 50 ℃, nqus cov nceb nyob ib ncig ntawm 30-60 feeb, tom qab ntawd coj nws tawm thiab siv lub tshuab ntxhua khaub ncaws Tindo los ntxuav nws kom tshem tawm cov maltose nyob rau saum npoo ntawm nceb Cov.
Qhov kev kho mob no tseem yog txoj kev siv dav dav hauv kev ua tiav ntawm cov txiv ntoo thiab zaub ua daim tawv nyias. Lub luag haujlwm tseem ceeb yog los hloov ib feem ntawm cov dej noo hauv cov nceb los ntawm kev siv qhov sib txawv ntawm cov kua dej thiab lub ntsiab lus hauv dej hauv cov nceb. Nyob rau tib lub sijhawm, nkag mus rau cov nceb nrog macromolecular cov khoom tuaj yeem txhim kho Cov ntsiab lus muaj zog, nce lub zog ntawm cov ntaub so ntswg, kho qhov sib txawv txawv, thiab homogenize cov khoom sib xyaw.
