Kev Nyab Xeeb ntawm methylcellulose hauv zaub mov

1. Cov khoom thiab kev ua haujlwm ntawm methylcellulose

Cov qauv molecular ntawm methylcellulose yog raws liβ-1,4-glucose unit, uas yog tsim los ntawm kev hloov qee pawg hydroxyl nrog pawg methoxy. Nws yaj tau hauv dej txias thiab tuaj yeem tsim cov gel rov qab tau hauv qee qhov xwm txheej. Nws muaj cov khoom zoo thickening, emulsification, suspension, stability thiab water retention. Cov haujlwm no ua rau nws siv dav hauv qhob cij, pastries, dej haus, mis nyuj, khoom noj khov thiab lwm yam teb. Piv txwv li, nws tuaj yeem txhim kho cov qauv ntawm cov khob cij thiab ncua kev laus; hauv cov khoom noj khov, nws tuaj yeem txhim kho qhov khov-thaw tsis kam.

Txawm hais tias nws muaj ntau yam haujlwm sib txawv, methylcellulose nws tus kheej tsis nqus lossis metabolized hauv tib neeg lub cev. Tom qab noj, nws feem ntau yog tawm los ntawm txoj hnyuv hauv daim ntawv tsis lwj, uas ua rau nws cov kev cuam tshuam ncaj qha rau tib neeg lub cev zoo li tsawg. Txawm li cas los xij, tus cwj pwm no kuj tau ua rau tib neeg txhawj xeeb tias nws cov kev noj mus sij hawm ntev yuav cuam tshuam rau kev noj qab haus huv ntawm txoj hnyuv.

2. Kev ntsuam xyuas tshuaj lom thiab kev tshawb fawb txog kev nyab xeeb

Ntau txoj kev tshawb fawb txog tshuaj lom neeg tau qhia tias methylcellulose muaj kev sib raug zoo ntawm cov tsiaj txhu thiab tsis muaj tshuaj lom. Cov txiaj ntsig ntawm kev sim tshuaj lom neeg mob hnyav tau qhia tias nws LD50 (median lethal dose) siab dua li qhov ntau uas siv rau hauv cov khoom noj khoom haus ib txwm muaj, qhia txog kev nyab xeeb siab. Hauv kev sim tshuaj lom neeg mus sij hawm ntev, nas, nas thiab lwm yam tsiaj tsis tau qhia txog cov kev tsis haum tshuaj loj hauv kev pub mis ntev ntawm cov koob tshuaj ntau, suav nrog kev pheej hmoo xws li carcinogenicity, teratogenicity thiab reproductive toxicity.

Tsis tas li ntawd xwb, cov nyhuv ntawm methylcellulose rau tib neeg txoj hnyuv kuj tau raug kawm dav dav. Vim tias nws tsis zom thiab nqus tau, methylcellulose tuaj yeem ua rau cov quav ntau ntxiv, txhawb kev ua haujlwm ntawm txoj hnyuv, thiab muaj qee yam txiaj ntsig hauv kev txo qhov mob cem quav. Tib lub sijhawm, nws tsis yog fermented los ntawm cov kab mob hauv plab, txo qhov kev pheej hmoo ntawm flatulence lossis mob plab.

3. Cov Cai thiab cov qauv

Kev siv methylcellulose ua cov khoom noj khoom haus ntxiv yog tswj hwm nruj heev thoob ntiaj teb. Raws li kev ntsuam xyuas ntawm Pawg Neeg Saib Xyuas Kev Sib Koom Tes ntawm Cov Khoom Noj Khoom Haus Ntxiv (JECFA) nyob rau hauv Lub Koom Haum Khoom Noj thiab Kev Ua Liaj Ua Teb ntawm United Nations (FAO) thiab Lub Koom Haum Kev Noj Qab Haus Huv Ntiaj Teb (WHO), qhov kev noj haus txhua hnub (ADI) ntawm methylcellulose yog "tsis tau teev tseg", qhia tias nws muaj kev nyab xeeb siv hauv cov koob tshuaj pom zoo.

Hauv Tebchaws Meskas, methylcellulose yog teev raws li cov khoom noj khoom haus uas lees paub tias muaj kev nyab xeeb (GRAS) los ntawm US Food and Drug Administration (FDA). Hauv European Union, nws yog cais ua cov khoom noj khoom haus ntxiv E461, thiab nws qhov kev siv ntau tshaj plaws hauv cov khoom noj sib txawv tau teev meej meej. Hauv Suav teb, kev siv methylcellulose kuj raug tswj hwm los ntawm "National Food Safety Standard Food Additive Usage Standard" (GB 2760), uas yuav tsum tau tswj hwm nruj ntawm cov tshuaj raws li hom khoom noj.