Cov tshuaj tua kab mobyog cov khoom uas tiv thaiv kev loj hlob ntawm cov kab mob hauv ib yam khoom lossis tiv thaiv kev loj hlob ntawm cov kab mob uas ua rau cov khoom lag luam.Preservatives tsis tsuas yog inhibit cov metabolism ntawm cov kab mob, pwm thiab poov xab, tab sis kuj cuam tshuam rau lawv txoj kev loj hlob thiab kev loj hlob.Cov nyhuv preservative nyob rau hauv formulation yog cuam tshuam los ntawm ntau yam, xws li qhov kub thiab txias ntawm ib puag ncig, PH ntawm formulation, txheej txheem tsim, thiab lwm yam. Yog li ntawd, kev nkag siab txog ntau yam yuav pab xaiv thiab siv ntau yam preservatives.
Cov yam ntxwv uas cuam tshuam rau kev ua haujlwm ntawm cov tshuaj pleev ib ce kom zoo nkauj yog raws li hauv qab no:
A. xwm ntawm preservatives
Qhov xwm ntawm preservative nws tus kheej: kev siv ntawm preservatives concentration thiab solubility ntawm ib tug zoo heev cuam tshuam rau cov hauj lwm zoo
1, Feem ntau, qhov siab dua qhov concentration, zoo dua;
2, Dej-soluble preservatives muaj preservatives kev ua tau zoo dua: cov kab mob feem ntau ntau nyob rau hauv cov dej theem ntawm emulsified lub cev, nyob rau hauv lub emulsified lub cev, cov kab mob yuav adsorbed ntawm cov roj-dej interface los yog tsiv mus nyob rau hauv cov dej theem.
Kev sib cuam tshuam nrog lwm cov khoom xyaw hauv kev tsim: inactivation ntawm preservatives los ntawm ib co tshuaj.
B. Cov txheej txheem ntau lawm ntawm cov khoom
Qhov chaw tsim khoom;qhov kub ntawm cov txheej txheem ntau lawm;qhov kev txiav txim uas cov ntaub ntawv ntxiv
C. Cov khoom kawg
Cov ntsiab lus thiab txheej ntim ntawm cov khoom ncaj qha txiav txim siab qhov chaw nyob ntawm cov kab mob hauv cov tshuaj pleev ib ce.Lub cev ib puag ncig muaj xws li kub, ib puag ncigtus nqi pH, osmotic siab, hluav taws xob, siab zoo li qub;Cov tshuaj muaj xws li cov dej, cov khoom noj (C, N, P, S), oxygen, thiab cov organic loj hlob.
Qhov kev ua tau zoo ntawm cov tshuaj tiv thaiv zoo li cas?
Qhov tsawg kawg nkaus inhibitory concentration (MIC) yog lub hauv paus Performance index los ntsuam xyuas cov nyhuv ntawm preservatives.Qhov tsawg dua tus nqi MIC yog, qhov ua tau zoo dua.
MIC ntawm preservatives tau txais los ntawm kev sim.Qhov sib txawv ntawm cov tshuaj preservatives tau ntxiv rau hauv cov kua nruab nrab los ntawm ntau txoj kev dilution, thiab tom qab ntawd cov kab mob tau inoculated thiab cultured, qhov qis tshaj inhibitory concentration (MIC) raug xaiv los ntawm kev soj ntsuam kev loj hlob ntawm cov kab mob.
Lub sij hawm xa tuaj: Mar-10-2022