Cov khoom

Beta-carotene

Beta-carotene yog lub ntuj carotenoid dav pom nyob rau hauv ntsuab thiab daj zaub thiab txiv hmab txiv ntoo.Beta-carotene yog tetraterpenoid compound, uas muaj plaub isoprene ob daim ntawv cog lus.Nws muaj ib lub nplhaib beta-violone ntawm txhua qhov kawg ntawm cov molecule.Ob lub vitamin A molecule tuaj yeem tsim los ntawm lub hauv paus tawg.Nws muaj ntau ob daim ntawv cog lus thiab conjugates ntawm ob daim ntawv cog lus.Molecules tau ntev conjugated ob daim ntawv cog lus chromophores, yog li lawv muaj cov cuab yeej ntawm lub teeb nqus thiab ua rau lawv daj.Cov ntaub ntawv tseem ceeb ntawm beta-carotene yog tag nrho-trans, 9-cis, 13-cis thiab 15-cis.Muaj ntau tshaj 20 isomers ntawm beta-carotene, uas yog insoluble nyob rau hauv dej thiab me ntsis soluble nyob rau hauv zaub roj.Lawv yog me ntsis soluble nyob rau hauv aliphatic thiab aromatic hydrocarbons, yooj yim soluble nyob rau hauv chloroform, tsis ruaj tsis khov nyob rau hauv tshuaj muaj pes tsawg leeg, thiab yooj yim rau oxidize nyob rau hauv lub teeb thiab cua sov.

Beta-carotene tuaj yeem tsim los ntawm kev siv tshuaj lom neeg, tshem tawm cov nroj tsuag thiab microbial fermentation.Raws li kev tsim khoom sib txawv, nws tuaj yeem muab faib ua ob pawg: tshuaj lom neeg ntawm beta-carotene thiab ntuj beta-carotene.Tam sim no, feem ntau ntawm lawv yog cov tshuaj.Vim hais tias ntuj beta-carotene muaj zoo anti-chromosomal aberration, anti-cancer nyhuv thiab muaj zog physiological kev ua si, tus nqi ntawm natural beta-carotene yog siab.Nws yog ob zaug ntau npaum li cov tshuaj.

Beta-carotene yog lub npe hu ua lub hauv paus ntawm vitamin A. Yav tas los synthesized beta-carotene tau dav siv hauv cov khoom noj, tshuaj pleev ib ce thiab khoom noj qab haus huv.Nrog rau txoj kev loj hlob ntawm toxicology thiab analytical technology, kev tshawb fawb qhia tau hais tias txawm hais tias lub purity ntawm beta-carotene synthesized los ntawm tshuaj txoj kev yog kuj siab thiab cov nqi ntau lawm, nws yog ib qho yooj yim mus muab ib tug me me npaum li cas ntawm cov tshuaj lom nyob rau hauv cov khoom.Yog li ntawd, nrog kev txhim kho txuas ntxiv ntawm kev paub, kev tshem tawm ntawm beta-carotene yuav ua haujlwm nyob rau hauv kev ua lag luam.Tab sis vim yog cov khoom muaj roj-soluble ntawm beta-carotene, nws daim ntawv thov tau raug txwv heev.Qee cov kev tshawb fawb tau txhim kho cov dej solubility ntawm beta-carotene los ntawm saponification thiab emulsification, tab sis txoj kev no muaj lub sij hawm ntev, muaj kev cuam tshuam ntau dua rau kev ruaj ntseg ntawm beta-carotene, thiab muaj nqi ntau dua.Kev rho tawm ntawm ntuj beta-carotene, cov organic solvents nyob rau hauv feem ntau ntawm cov kev siv tam sim no, thiab cov teeb meem seem ntawm cov kuab tshuaj lom tau txwv tsis pub siv cov khoom rho tawm, uas ua rau muaj kev nyab xeeb ntawm zaub mov ntau dua thiab teeb meem ntawm ib puag ncig.Kev rho tawm ntawm cov dej-soluble beta-carotene kuj tau tshaj tawm, tab sis cov dej-solubility ntawm beta-carotene tsis zoo, feem ntau nrog kev pab ntawm enzymes, yog li tus nqi siab thiab daim ntawv thov tsis zoo.Piv nrog rau txoj kev rho tawm cov pa, txoj kev rho tawm ultrasonic muaj qhov zoo ntawm kev yooj yim, siab rho tawm tus nqi thiab lub sijhawm ua haujlwm luv.Yog li ntawd, raws li txoj hauv kev tshiab los rho tawm cawv-soluble beta-carotene, ultrasonic extraction muaj cov ntawv thov zoo hauv daim teb no.

Kev siv cov beta-carotene

Raws li ib hom roj-soluble pigment, beta-carotene tau txais tos txais tos los ntawm kev lag luam zaub mov vim nws cov xim tuaj yeem npog tag nrho cov xim ntawm cov xim liab mus rau daj vim nws qhov sib txawv concentration.Nws yog qhov tsim nyog rau kev tsim cov khoom lag luam roj thiab cov khoom noj protein, xws li margarine, ntses pulp refined khoom, cov khoom noj tsis noj nqaij, cov noodles ceev ceev thiab lwm yam.