Qhov Txiaj Ntsig Ntawm Lactic Acid Cov Kab Mob Rau Cov Ciaj Ntsig Zoo
May 06, 2021
(1) Txhim kho lub rheological zog thiab ua cov khoom ua cov yam ntxwv ntawm lub khob noom cookie
Cov kab mob lactic acid tuaj yeem tsim cov lactic acid, acetic acid, propionic acid thiab lwm cov organic acids thaum lub txheej txheem fermentation. Lawv tuaj yeem txo tus nqi pH ntawm cov khob cij, pab txhawb kev ua kom tau cov gluten thiab txhawb cov khoom ntawm gluten, yog li hloov pauv rheological yam ntxwv ntawm lub khob noom cookie, nce qhov viscosity ntawm lub khob noom cookie, thiab txhim kho kev ntxhib los mos ntawm khob cij. Cov kab mob lactic acid tuaj yeem ua rau qee qhov ua kom cov kua roj (hydrophilic colloids) thaum lub sijhawm ua haujlwm, uas tuaj yeem txhim kho cov khoom siv ua cov khoom siv ntawm lub khob noom cookie, cov khoom ntim tshwj xeeb, qauv qauv thiab lub neej ua haujlwm ntawm lub khob cij.
(2) Txhim kho qhov qab ntawm qhob cij
Cov organic acid ua los ntawm kev kho lub zog ntawm cov kab mob lactic acid tuaj yeem cuam tshuam nrog cov cawv, aldehyde, ketone thiab lwm yam khoom tsim tawm hauv kev kho kom haum los tsim ntau yam tshiab saj cov tshuaj, yog li txhim kho qhov qab ntawm qhob cij. Ntxiv rau, cov hniav puas sib piv ntawm lactic acid thiab acetic acid yog suav hais tias yog ib qho tseem ceeb cuam tshuam rau qhov qab ntawm cov khoom xyaw sourdough, thiab qhov kev pom zoo yog 2.0-2.7.
(3) Txuas ntxiv lub txee lub neej ntawm qhob cij
Kev tshawb nrhiav tau pom tias cov cij kua txiv qaub ua los ntawm Lactobacillus, tshwj xeeb tshaj yog cov kua txiv qaub uas tau los ntawm Lactobacillus fermentum, yog ib qho zoo los tiv thaiv pwm pwm. Vim tias cov kab mob lactic acid tsim tawm qee cov khoom xyaw tshuaj tua kab mob thaum lub sijhawm ua haujlwm fermentation, lawv tuaj yeem tiv thaiv kab mob rau cov zaub mov muaj kab mob thiab zaub mov muaj kab mob, nrog rau Listeria, Bacillus subtilis thiab Staphylococcus aureus. Siv cov tshuaj qaug cawv Cov poom xab poom tuaj yeem txo qhov kev siv tshuaj ua kom muaj tshuaj nyob hauv cov khoom noj nplej zom.
(4) Los tiv thaiv kev laus muaj peev xwm
Lub chaw ua haujlwm acidic tsim los ntawm kev kho lub lactic acid cov kab mob hauv lub khob noom cookie, lub protease tsim los ntawm cov kab mob lactic acid, thiab cov metabolites xws li polysaccharides uas ua los ntawm cov kab mob lactic acid yog txhua yam zoo rau txo cov laus ntawm cov mov. Ntawm ib sab tes, cov kua qaub thiab polysaccharides uas ua los ntawm cov kab mob lactic acid tuaj yeem hloov cov qauv ntawm lub khob noom cookie, uas tuaj yeem txhim kho dej kom muaj peev xwm tuav tau ntawm lub khob noom cookie kom txog rau qee yam. Ntawm qhov tod tes, cov hmoov txhuv nplej siab cov cuam tshuam tau cuam tshuam los ntawm cov enzymes uas ua los ntawm cov kab mob lactic acid, thiab cov hmoov txhuv nplej siab hloov tshiab muaj peev xwm hloov, uas ua rau qeeb qeeb ntawm kev laus ntawm lub khob cij. nrawm.
