Tej zaum koj yuav paub me ntsis txog kojic acid, tab sis kojic acid kuj muaj lwm cov tswv cuab hauv tsev neeg, xws li kojic dipalmitate. Kojic acid dipalmitate yog tus neeg sawv cev dawb kojic acid nrov tshaj plaws hauv kev ua lag luam tam sim no. Ua ntej peb paub kojic acid dipalmitate, cia peb kawm txog nws cov thawj coj - "kojic acid".
Kojic Acidyog tsim los ntawm kev fermentation thiab purification ntawm glucose los yog sucrose nyob rau hauv qhov kev ua ntawm kojise. Nws cov txheej txheem whitening yog los inhibit qhov kev ua haujlwm ntawm tyrosinase, inhibit qhov kev ua haujlwm ntawm N-hydroxyindole acid (DHICA) oxidase, thiab thaiv qhov polymerization ntawm dihydroxyindole (DHI). Nws yog ib qho tshuaj dawb uas tsis tshua muaj neeg sawv cev uas tuaj yeem inhibit ntau yam enzymes tib lub sijhawm.
Tab sis kojic acid muaj lub teeb, cua sov thiab hlau ion tsis ruaj khov, thiab tsis yooj yim rau daim tawv nqaij nqus tau, yog li kojic acid derivatives tau tshwm sim. Cov kws tshawb fawb tau tsim ntau yam kojic acid derivatives los txhim kho kev ua tau zoo ntawm kojic acid. Kojic acid derivatives tsis yog tsuas yog muaj tib lub tshuab ua kom dawb li kojic acid, tab sis kuj muaj kev ua tau zoo dua li kojic acid.
Tom qab esterification nrog kojic acid, lub monoester ntawm kojic acid tuaj yeem tsim tau, thiab diester kuj tuaj yeem tsim tau. Tam sim no, tus neeg sawv cev dawb kojic acid nrov tshaj plaws hauv khw yog kojic acid dipalmitate (KAD), uas yog ib qho diesterified derivative ntawm kojic acid. Kev tshawb fawb qhia tau hais tias cov nyhuv dawb ntawm KAD sib xyaw nrog glucosamine derivatives yuav nce ntxiv exponentially.
Kev saib xyuas tawv nqaij zoo ntawm kojic dipalmitate
1) Ua kom dawb: Kojic acid dipalmitate zoo dua li kojic acid hauv kev txwv tsis pub ua haujlwm ntawm tyrosinase hauv daim tawv nqaij, yog li ntawd txwv tsis pub tsim melanin, uas muaj cov txiaj ntsig zoo rau kev ua kom dawb ntawm daim tawv nqaij thiab tshuaj pleev thaiv hnub.
2) Kev tshem tawm cov quav hnav: Kojic acid dipalmitate tuaj yeem txhim kho cov tawv nqaij pigmentation, thiab tuaj yeem tawm tsam cov pob hnub nyoog, cov cim ncab, cov quav hnav thiab cov xim dav dav.
Daim ntawv qhia txog kev sib xyaw ua ke ntawm Dipalmitate rau cov khoom pleev ib ce
Kojic acid dipalmitatenyuaj rau ntxiv rau hauv cov mis thiab yooj yim rau kev tsim cov dej siv lead ua. Yuav kom daws tau qhov teeb meem no, nws raug pom zoo kom ntxiv isopropyl palmitate lossis isopropyl myristate rau cov roj theem uas muaj kojic dipalmitate, cua sov cov roj theem rau 80 ℃, tuav rau 5 feeb kom txog thaum kojic dipalmitate yaj tag, tom qab ntawd ntxiv cov roj theem rau cov dej theem, thiab emulsify rau li 10 feeb. Feem ntau, tus nqi pH ntawm cov khoom kawg tau txais yog li 5.0-8.0.
Cov koob tshuaj pom zoo ntawm kojic dipalmitate hauv cov tshuaj pleev ib ce yog 1-5%; Ntxiv 3-5% hauv cov khoom ua kom dawb.
Lub sijhawm tshaj tawm: Lub Kaum Hli-21-2022