alpha-ArbutinCAS84380-01-8
cov lus qhia tshwj xeeb
| YAM KHOOM | COV LUS QHIA |
| Qhov tsos | Dawb los yog dawb-dawb crystalline hmoov. |
| Kev yaj tau | Cov khoom no yog soluble hauv dej thiab me ntsis soluble hauv ethanol. |
| Dkev ntxub ntxaug | Lub sijhawm khaws cia ntawm lub ncov tseem ceeb hauv cov kua kuaj yuav tsum sib xws nrog lub ncov tseem ceeb hauv cov khoom siv siv. |
| Hydroquinone | ND |
| Kev sib hloov tshwj xeeb | +174.0°-+186.0° |
| Melting point | 202-207 ℃ |
| Kev pom tseeb ntawm cov kua dej | Cov kua dej yuav tsum tsis muaj xim, pob tshab thiab tsis muaj cov tshuaj uas raug nchuav. |
| Qhov taw tes kub hnyiab | 174°F |
| pH (1% kua dej) | 5.0-7.0 |
| Poob thaum ziab | ≤0.5% |
| Cov seem ntawm kev hlawv | ≤0.5% |
| Cov hlau hnyav (xam ua Pb) | ≤10ppm |
| cov ntsiab lus | ≥99.0% |
| XAUS LUS | COV TXiaj Ntsig Ua Raws Li Cov Qauv Lag Luam |
Kev Siv
Arbutinyog cov tshuaj hydroquinone glycoside. Nws lub npe tshuaj yog 4-Hydroquinone-alpha-D-glucopyranoside. Nws muaj nyob rau hauv cov nroj tsuag xws li bearberry thiab bilberry, thiab nws yog ib qho tshuaj dawb tshiab uas tsis muaj kev khaus, tsis muaj kev ua xua thiab muaj zog sib xws ntawm Chemicalbook. Muaj ob pawg qauv thiab ua haujlwm hauv cov qauv molecular ntawm arbutin: ib qho yog cov piam thaj glucose, thiab lwm qhov yog pawg phenolic hydroxyl. Alpha-arbutin yog nyob rau hauv lub xeev lub cev ntawm cov hmoov dawb rau lub teeb grey thiab yog soluble hauv dej thiab ethanol.
Alpha-arbutinmuaj cov txiaj ntsig zoo rau kev kho cov qhov txhab uas tshwm sim los ntawm kev kub hnyiab ultraviolet, thiab muaj cov txiaj ntsig zoo tiv thaiv kev o, kho thiab ua kom dawb. Nws tuaj yeem tiv thaiv kev tsim thiab tso melanin thiab tshem tawm cov pob khaus thiab cov quav hnav thaum laus.
Lub tshuab ua kom dawb ntawm alpha-arbutin yog los tiv thaiv ncaj qha rau kev ua haujlwm ntawm tyrosinase, yog li txo qhov tsim tawm ntawm melanin, es tsis yog ua tiav lub hom phiaj ntawm kev txo qhov tsim tawm ntawm melanin los ntawm kev tiv thaiv kev loj hlob ntawm tes lossis kev qhia tawm ntawm tyrosinase gene. Txij li thaum alpha-arbutin yog cov khoom siv ua kom dawb zoo dua thiab muaj kev nyab xeeb dua, ntau lub tuam txhab pleev kom zoo nkauj hauv tsev thiab txawv teb chaws twb tau siv alpha-arbutin es tsis txhob siv beta-arbutin ua cov khoom ntxiv ua kom dawb. Alpha-arbutin yog ib yam tshuaj lom neeg. Zoo ib yam li arbutin, alpha-arbutin tuaj yeem tiv thaiv kev tsim tawm thiab kev tso tawm ntawm melanin thiab tshem tawm cov pob hnub nyoog thiab cov quav hnav. Kev tshawb fawb tau qhia tias alpha-arbutin tuaj yeem tiv thaiv kev ua haujlwm ntawm tyrosinase ntawm qhov tsis tshua muaj zog, thiab nws cov nyhuv inhibitory ntawm tyrosinase zoo dua li ntawm arbutin. Alpha-arbutin tuaj yeem siv ua tus neeg sawv cev dawb hauv cov tshuaj pleev kom zoo nkauj.
Ntim thiab Xa Khoom
25KG / Nruas los yog raws li cov neeg siv khoom xav tau.
Yog cov khoom siv dav dav thiab tuaj yeem xa los ntawm dej hiav txwv thiab huab cua
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
