Vim li cas Lactic Acid Cov Kab Mob Ciaj Ciaj Ciaj Uas Muaj Cov Tshuaj antioxidant?
Jan 19, 2021
Los ua cov khoom ci ci nrog lub txee ntev lub neej, tsis tas yuav tsum yog nws lub txee lub neej thiab lub koom haum, tab sis kuj tseem muaj qhov tseem ceeb ntawm cov khoom lag luam yuav tsum tswj, tsis muaj ntxhiab tsw phem, xws li roj. Txij li feem ntau cov tshuaj tiv thaiv antioxidant (xws li BHA, BHT, PG, TBHQ) muaj ntau yam teeb meem kev nyab xeeb khoom noj, lub teb chaws tus qauv tsis pub lawv siv cov khoom qab zib thiab khob cij, yog li ntuj tsim, nyab xeeb, thiab muaj cov tshuaj tua kab mob antioxidant tau dhau los ua kom pom tseeb ntawm bakery tuam ntxhab. Niaj hnub no, tus kws sau ntawv ntawm Baiqing tau qhia txog cov kab mob antioxidant ntawm cov kab mob lactic acid.
Raws li ib hom kab mob uas tsis tuaj yeem siv cov pa oxygen los ua lub zog ua pa, cov kab mob lactic acid yuav tsum ntsib kev ntxhov siab los ntawm oxygen hauv cov kev hloov mus sij hawm ntev. Yog li, thiaj li yuav zam tau qhov kev cuam tshuam ntawm cov pa oxygen reactive (ROS) xws li superoxide anion, hydrogen peroxide thiab hydroxyl radicals ntawm macromolecules lom xws li protein, cell membrane thiab DNA, kab mob lactic acid yuav tsim ntau yam antioxidant, tshwj xeeb yog kev zais. Antioxidant enzymes, hlau ion chelation, intracellular redox xeev, thiab lwm yam.
1. Ua kom muaj ntau yam tshuaj antioxidant
Thaum ntsib kev ntxhov siab oxidative, cov kab mob lactic acid ua ntau yam antioxidant enzymes thaum lub cev metabolism, xws li NADH oxidase, NADH peroxidase, superoxide dismutase, catalase, thiab lwm yam.
NADH oxidase feem ntau muaj nyob rau hauv Streptococcus, uas tuaj yeem ua rau cov pa oxygen tau txais 1, 2 thiab 4 lub tshuab hluav taws xob, thiab siv oxygen los ua cov kab mob rau cov dej los yog hydrogen peroxide rau catalyze sib txawv.
Lactobacillus thiab faecalis tseem tuaj yeem tsim NADH peroxidase thaum lub sij hawm fermentation, uas tuaj yeem txo cov hydrogen peroxide ncaj qha rau dej, tab sis cov enzyme no muaj qhov ua tau zoo nyob rau hauv kev txo qis hydrogen peroxide nyob rau hauv oxidative kev nyuaj siab, thiab nws tsuas yog siv los ua synergistic Oxidative tiv thaiv mechanism.
Yog lawm, qee qhov Lactobacillus thiab Streptococcus tseem tsim cov superoxide dismutase, uas yog qhov tseem ceeb ntawm cov hlau muaj sia, thiab tuaj yeem muab faib ua Cu / Zn-SOD, Mn-SOD thiab Fe- raws li kev sib xyaw ntawm cov hlau sib txawv. Muaj peb hom SOD, tab sis thaum qhia SOD nce mus txog ib theem, nws yuav txhim kho lub zog tiv thaiv kev muaj peev xwm ntawm Lactobacillus thiab tseem muaj cov nyhuv los tiv thaiv.
Hauv Lactobacillus plantarum thiab Lactobacillus sake, ob hom catalase (CAT) feem ntau yog qhia, uas tuaj yeem txhim kho qhov muaj peev xwm ntawm cov kab mob lactic acid fermentation cov khoom kom zam cov tshuaj hydrogen peroxide. Nws ntxiv rau cov khoom noodle kom ncua cov lipid ntawm qhov khoom. Peroxidation, thiab lwm yam, tswj qhov tshiab tsw qab. Thaum SOD thiab CAT ua haujlwm ua ke, lawv tuaj yeem ua lub luag haujlwm ntxiv rau hauv kev ua pa oxygen sib xyaw ua kom zoo thiab txhim kho qhov muaj zog tiv thaiv antioxidant ntawm cov khoom.
Hauv Lactobacillus plantarum, kuj tseem muaj cov enzyme proteins xws li pyruvate oxidase. Txawm hais tias cov enzymes no tsis tau nthuav dav dav, lawv tseem muaj qee qhov kev tiv thaiv antioxidant, uas txo cov kev cuam tshuam ntawm oxidative kev nyuab siab rau cov hlwb rau qee yam.
2. Cov manganese ion
Lactobacillus plantarum muaj qhov ua kom tsis haum manganese ions txog 35 mmol / L. Cov tshuaj yeeb dej caw no zoo ib yam nrog cov kev ua ntawm superoxide dismutase, uas tuaj yeem tshem tawm cov tshuaj tua tsis mob superoxide. Qhov kev tshem tawm no yuav tsum tso cov neeg muaj phosphate pab pawg thiab nrog kev koom tes ntawm lactic acid, cov kab mob lactic acid cov kab mob ua kom cov khoom haum tuaj yeem ua si tau cov tshuaj tua kab mob zoo dua.
3. Tswjhwm intracellular redox lub xeev
Cov kab mob Lactic acid lawv tus kheej muaj ntau cov roj ntsha me molecular lossis peptides nrog lub zog antioxidant, xws li glutathione (GSH). Cov roj ntsha me no ua lub luag haujlwm tseem ceeb hauv kev tswj hwm intracellular redox lub xeev cov kab mob, xws li tau txais cov xaim hluav taws xob tuaj koom nrog oxidative kev nyuaj siab. Cov tshuaj tiv thaiv thiab kho ntawm cov protein tsis zoo thiab lwm cov roj ntsha macromolecules.
4. Kev haum tshuab
Cov kab mob lactic acid tiv thaiv qee qhov kev ntxhov siab ib puag ncig, xws li UV hluav taws xob, kev tshaib plab, qhov kub thiab tsis tshua muaj pH, uas tuaj yeem txhim kho kev tiv thaiv kev muaj peev xwm ntawm cov kab mob tiv thaiv lwm cov kev ntxhov siab.
Oxidative kev nyuaj siab yog qhov tseem ceeb uas cuam tshuam rau kev loj hlob, fermentation kev ua tau zoo thiab cov yam ntxwv ntawm cov khoom siv ntawm cov kab mob lactic acid. Tau ntau xyoo, Guangzhou Baiqing Lub Tuam Txhab tau tshawb fawb txog cov ntsiab lus saum toj no thiab txawm tias lwm cov txheej txheem sib txawv los soj ntsuam thiab faus cov kab mob lactic acid cov kab mob nrog antioxidant zog thiab cov khoom siv tshuaj tua kab mob thiab ua kom zoo-tshiab. Kev sib sib zog nqus, kev kawm paub txog cov khoom xyaw nrog cov tshuaj tua kab mob thiab tshuaj tua kab mob, siv rau hauv kev lag luam ci, daws cov kev tiv thaiv ntau yam rau cov neeg siv khoom xws li kev laus, roj oxidation, pwm kev loj hlob, thiab cov kab mob ntev li ntawm.