Carrageenan yog ib qho ntawm cov zaub mov ntxiv rau hauv lub ntim ntawm ntau yam khoom noj. Ntxiv mus, qhov ntau ntawm nws siv yog qhov dav heev: los ntawm sausage mus rau curd loj.
Carrageenan yog cov khoom noj muaj txiaj ntsig zoo uas tuaj yeem pom muaj nyob rau hauv ntau cov khoom noj hnub no. Nyob rau tib lub sijhawm, nws tuaj yeem tshwm nyob rau hauv cov khoom sib xyaw hauv cov npe sib txawv: carrageenan nws tus kheej, ib qho ntawm carrageenan ntsev, piv txwv li, potassium, sodium lossis ammonium, lossis tsuas yog khoom noj khoom haus ntxiv E407. Nws yog dabtsi?
Ua carrageenan
Carrageenan yog lub ntuj tsim los ntawm cov algae liab tshwj xeeb rau Rhodophyceae tsev neeg. Lawv muaj nyob rau yuav luag txhua lub hiav txwv, tab sis lub cev dej sov tau xaiv rau feem ntau rau lawv cov chaw sau qoob loo, txij li thaum lawv luam tawm tom qab ntawd muaj feem ntau sai sai: piv txwv li, carrageenan tau sau qoob loo hauv tebchaws Philippines, Indonesia, Chile thiab lwm lub tebchaws kub.
Ntau hom carrageenans tau siv rau kev siv hauv kev lag luam khoom noj khoom haus, thiab hauv tag nrho tsev neeg no suav nrog ntau dua 3,000 tsiaj ntawm algae. Hauv qhov no, tau kawg, tsis yog siv algae lawv tus kheej, tab sis cov tshuaj uas tau muab rho tawm los ntawm lawv, uas yog hu ua sulfated polysaccharides. Yuav kom rho tawm lawv, thawj pib cov khoom siv yog hau rau hauv kev daws teeb meem, thiab tom qab ntawd cov txiaj ntsig zoo li gel yog ziab thiab zuaj. Yog li, carrageenan raw khoom siv rau hauv kev lag luam khoom noj khoom haus yog tsim.
Kev siv cov carrageenan
Kev siv cov carrageenan hauv kev ua zaub mov yog ntau yam thiab nyob ntawm seb nws cov tshuaj lom neeg muaj pes tsawg leeg. Yog li, cov kws tshawb fawb tau cais peb pawg tseem ceeb ntawm cov tshuaj no: thawj ntawm lawv yog kappa-carrageenans, uas yog cov gels khoom siv rau kev tsim cov khoom noj siv mis. Qhov thib ob yog iota-carrageenans, uas yog, muag gels uas siv hauv cov mis, nqaij thiab lwm yam lag luam. Thaum kawg, pab pawg thib peb yog cov lamda-carrageenans: cov khoom ua kua ntau tshaj plaws hauv kev sib piv nrog cov uas tau teev tseg, uas yog siv, piv txwv, hauv kev tsim cov kua ntsw. Tib lub sijhawm, cov gels ua raws li cov algae no tsis muaj cov tsiaj muaj protein, yog li lawv tuaj yeem noj los ntawm cov neeg uas zam nws, piv txwv li, cov neeg tsis noj nqaij.
Ntxiv rau kev lag luam khoom noj khoom haus, carrageenan tseem tseem siv hauv kev tsim cov khoom siv ntau yam khoom tu cev thiab tshuaj lom neeg hauv tsev. Piv txwv, nws feem ntau pom muaj hauv tshuaj txhuam hniav, plaub hau thiab tshuaj pleev ntsej muag, thiab lwm yam khoom.
Txawm li cas los xij, qee hom khoom siv no ua rau tib neeg lub cev nrog kev siv tas li. Piv txwv li, nws tau muaj pov thawj tias txo qis carrageenan ua rau muaj mob hnyav ntawm lub plab zom mov, yog li nws siv tsis yog siv rau hauv kev tsim khoom noj. Nyob rau tib lub sijhawm, hauv cov tebchaws European, kev siv txhua hom carrageenan raug txwv tsis pub siv rau menyuam yaus kev ua khoom noj.
