[Yuav Tsum Tau Paub Txog] Ntawm Cov Tshuaj Tiv Thaiv
Jun 30, 2020
NO.1 Sorbic acid thiab nws cov ntsev ntsev
Sorbic acid yog xim tsis muaj xim-zoo li siv lead ua los yog dawb siv lead ua hmoov, muaj ntxhiab tsw lossis me ntsis pungent tsw, zoo lub teeb thiab kub tsis kam, tab sis nws yog qhov yooj yim kom oxidized thiab ua kom zoo thaum raug rau huab cua ntev, thiab nws yog qhov nyuaj rau yaj hauv dej, yog li nws yooj yim siv Potassium ntsev soluble hauv dej. Sorbic acid thiab nws cov ntsev ntsev muaj cov kab mob ntau yam, thiab tuaj yeem siv hauv yuav luag txhua cov zaub mov uas muaj tus nqi pH qis dua 6.0. Nws yog qhov feem ntau cov kua qaub siv tshuaj tiv thaiv acidic. Sorbic acid thiab nws cov ntsev ntsev tuaj yeem tiv thaiv pwm, cov poov xab thiab cov kab mob aerobic, tab sis nws yuav luag tsis muaj txiaj ntsig tiv thaiv cov kab mob aerobic. Nws qhov kev mob lom yog qis dua lwm yam tshuaj siv, thiab nws cov tshuaj tiv thaiv muaj zog yog muaj zog dua li sodium benzoate thiab calcium propionate. Txawm li cas los xij, sorbic acid thiab nws cov ntsev ntsev ntsev yuav dhau los ua cov khoom noj muaj txiaj ntsig rau cov kab mob me me hauv cov khoom muaj kuab lom ntau ntau, uas yuav txhawb nqa cov pa phem. Txwv tsis pub siv: Cov ntsiab lus ntawm sorbic acid nyob rau hauv khob cij, pastry thiab bakery sau thiab cov nplais deg cov khoom lag luam yuav tsum tsis pub ntau dua 1g / kg.
Antiseptic mechanism: Sorbic acid ua ke nrog sulfhydryl pawg hauv microbial pwm kab ke los rhuav tshem ntau cov kab mob tseem ceeb ntawm cov kab mob me, thiaj li ua rau muaj kev cuam tshuam ntawm kev loj hlob ntawm cov kab mob me. Tsis tas li ntawd, nws tseem tuaj yeem cuam tshuam cov kev txawj sib kis, xws li kev xa cov cytochrome C mus rau oxygen thiab kev xa xov ntawm lub zog nyob rau saum npoo ntawm cell cell, li no inhibiting qhov loj hlob ntawm microorganisms thiab ua tiav lub hom phiaj ntawm kev khaws cia.
NO.2 Propionic acid thiab nws cov ntsev sodium thiab calcium
Propionic acid yog xim tsis muaj kob, oily, kua ntshiab nrog lub peculiar tsis hnov tsw thiab me ntsis ntsim pungent oily rancidity. Propionate sodium ntsev thiab calcium ntsev yog hmoov dawb nrog dej zoo solubility, ruaj khov rau lub teeb thiab kub, thiab tsw zoo ib yam li propionic acid. Ob qho tib si propionic acid thiab propionate tau yooj yim nqus los ntawm tib neeg lub cev thiab koom nrog cov txheej txheem kev zom zaub mov ntawm tib neeg lub cev. Tsis muaj qhov tshwm sim zoo, tab sis cov nyhuv antibacterial tsis muaj zog zoo li sorbic acid thiab benzoic acid. Propionic acid thiab ntsev muaj qhov ua tau zoo los tiv thaiv pwm, muaj cov tshuaj tiv thaiv tsis zoo rau cov kab mob, thiab tsis muaj qhov cuam tshuam rau cov poov xab, yog li lawv siv nyob rau hauv ncuav, mov ci thiab tshij. Cov tshuaj ntsev ntsev tsis tuaj yeem siv ua ke nrog cov tshuaj tua kab mob sodium bicarbonate los tsim cov ntsev uas tsis muaj ntxhiab kom txo tau cov khoom tsim CO2. Cov dej cawv ntawm lub ntsev ntsev yuav ncua cov kev ua kom lub khob noom cookie, yog li sodium propionate feem ntau siv hauv pastry, thiab calcium propionate feem ntau siv hauv cov ncuav. Siv kev txwv: cov ntsiab lus ntawm propionic acid nyob rau hauv khob cij thiab pastry cov khoom yuav tsum tsis pub ntau tshaj 2.5g / kg.
Antiseptic mechanism: Propionic acid thiab nws cov ntsev ntsev thiab calcium ntsev yog acid-preservatives, thiab lub ntsiab antiseptic yog undissociated propionic acid. Propionic acid yog kua qaub monocarboxylic acid, uas qhov tshuaj tiv thaiv cov synthesis β-alanine los ntawm cov kab mob me me thiab ua rau muaj cov kab mob tua.
Kev siv cov khoom noj khoom haus ntxiv yuav tsum ua raws li cov hauv qab no:
(1) Yuav tsum tsis txhob ua rau muaj kev noj qab haus huv rau tib neeg lub cev;
(2) spoilage thiab deterioration ntawm cov zaub mov yuav tsum tsis txhob npog;
(3) Cov khoom noj ntxiv rau lub cev yuav tsum tsis txhob siv los zais qhov tsis zoo hauv cov zaub mov nws tus kheej lossis hauv cov txheej txheem ua, lossis siv cov khoom noj khoom noj ntxiv rau lub hom phiaj ntawm kev ua nkauj nraug, deev luag poj luag txiv, lossis cuav;
(4) Tus nqi khoom noj khoom haus ntawm cov zaub mov nws tus kheej yuav tsum tsis txhob txo;
(5) Ntawm kev ua tiav ntawm kev cia siab tshwm sim, txo cov khoom noj siv ntau li ntau tau.
Cov lus qhia tseem ceeb:
Cov tshuaj khaws cia saum toj no yog cov khoom noj khoom haus ntxiv rau hauv cov lus A.1, thiab cov khoom noj khoom noj ntxiv nrog rau cov nuj nqi qub (tib xim thiab tus neeg saib xyuas xim, tshuaj tua kab mob, tshuaj tua kab mob) nyob rau hauv rooj A.1 yog siv ua ke, thiab lawv cov noj tshuaj rau lawv cov kev siv ntau tshaj Cov lej ntawm cov sib piv yuav tsum tsis pub tshaj 1.
Thaum siv cov kua tshuaj, cov poov xab kuj tseem nce ntxiv.