0102 ib0304 ib05
Vitamin A yog ib tug fat-soluble vitamin
Taw qhia
Vitamin A Palmitate, tshuaj npe raws li retinol acetate, yog cov vitamin ntxov tshaj plaws tau pom. Muaj ob hom vitamin A: ib qho yog retinol uas yog thawj daim ntawv ntawm VA, nws tsuas muaj nyob rau hauv cov tsiaj; Lwm qhov yog carotene. Retinol tuaj yeem ua ke los ntawm β-carotene los ntawm cov nroj tsuag. Nyob rau hauv lub cev, nyob rau hauv lub catalysis ntawm β-carotene-15 thiab 15'-double oxygenase, β-carotene hloov mus rau hauv ratinal uas yog rov qab mus rau retinol los ntawm kev ua tau zoo ntawm ratinal reductase. Yog li β-carotene tseem hu ua vitamin precursor.
piav 2
Daim ntawv thov
--- Khoom noj khoom haus ntxiv:Siv dav hauv kev tsim cov khoom noj khoom haus. Nws ua lub luag haujlwm tseem ceeb hauv kev txhawb lub zeem muag, tiv thaiv kev ua haujlwm, thiab daim tawv nqaij noj qab haus huv.
--- Cov khoom noj muaj zog:Feem ntau ntxiv rau ntau yam khoom noj khoom haus los txhim kho lawv cov khoom noj muaj txiaj ntsig. Cov piv txwv muaj xws li mis nyuj khov, cereals, thiab cov mis mos.
--- Tshuaj pleev ib ce thiab Skincare:Vitamin A, nyob rau hauv daim ntawv ntawm retinol los yog retinyl palmitate, yog ib tug nrov muaj nyob rau hauv cov tshuaj pleev ib ce thiab cov khoom tu tawv nqaij. Nws paub txog nws cov txiaj ntsig los tiv thaiv kev laus, xws li txo cov tsos ntawm cov kab zoo, wrinkles, thiab txhawb cov tawv nqaij rov qab.
--- Pharmaceutical Npaj:Vitamin A derivatives, hu ua retinoids, yog siv rau hauv kev npaj tshuaj. Lawv siv los kho ntau yam ntawm daim tawv nqaij xws li pob txuv, psoriasis, thiab yees duab. Retinoids tuaj yeem pab tswj kev loj hlob ntawm tes thiab txhawb kev noj qab haus huv ntawm daim tawv nqaij.
--- Tsiaj Pub Additives:Muab tso rau hauv cov qauv pub tsiaj los xyuas kom muaj kev loj hlob, kev loj hlob, thiab kev noj qab haus huv tag nrho ntawm cov tsiaj nyeg thiab nqaij qaib. Nws pab lawv pab txhawb rau kev ua me nyuam thiab kev tiv thaiv kab mob.
--- Kev Noj Qab Haus Huv Qhov Muag:Feem ntau suav nrog hauv cov tshuaj kho qhov muag, xws li retinol lossis hauv daim ntawv ntawm beta-carotene. Cov tshuaj pab txhawb nqa tag nrho qhov muag kev noj qab haus huv thiab tej zaum yuav muaj txiaj ntsig zoo rau cov tib neeg uas muaj kev pheej hmoo ntawm hnub nyoog ntsig txog macular degeneration (AMD) thiab lwm yam mob qhov muag.
Khoom specification
Parameter | Tus nqi |
Tshuaj npe | Vitamin A Palmitate |
Molecular Formula | C36H60O2 |
Molecular Luj | 524,87 g / mol |
Qhov tshwm sim | Yellow rau txiv kab ntxwv kua |
Solubility | Insoluble hauv dej |
Melting Point | 28-29 ° C |
Boiling Point | Decomposes siab tshaj 250 ° C |
Purity | ≥ 98% |
Kev cia khoom | Khaws rau hauv qhov chaw txias, qhuav |
Txee lub neej | Feem ntau 2-3 xyoos |
tsw | Tsis hnov ??tsw |
Qhov ntom | 0.941 g / cm3 |
Refractive Index | 1.50 Nws |
Kev sib hloov kho qhov muag | +24 ° txog +28 ° |
Heavy Metals (raws li Pb) | ≤ 10 ppm |
Poob rau ziab | ≤ 0.5% |
Assay | ≥ 1,000,000 IU/g (HPLC) |
Microbial txwv | Ua raws li cov qauv kev lag luam |