nkhani

Mungadziwe pang'ono za kojic acid, koma kojic acid ilinso ndi mamembala ena a m'banja, monga kojic dipalmitate. Kojic acid dipalmitate ndiye mankhwala otchuka kwambiri oyeretsa kojic acid pamsika pakadali pano. Tisanadziwe kojic acid dipalmitate, choyamba tiyeni tidziwe za yomwe idalipo kale - "kojic acid".
Kojic AcidAmapangidwa ndi kuwiritsa ndi kuyeretsa shuga kapena sucrose pogwiritsa ntchito kojise. Njira yake yoyeretsera ndi kuletsa ntchito ya tyrosinase, kuletsa ntchito ya N-hydroxyindole acid (DHICA) oxidase, ndikuletsa polymerization ya dihydroxyindole (DHI). Ndi chinthu chosowa kwambiri choyeretsa chomwe chingalepheretse ma enzymes angapo nthawi imodzi.

Koma asidi wa kojic ali ndi kusakhazikika kwa ayoni owala, kutentha ndi chitsulo, ndipo sikophweka kuyamwa ndi khungu, kotero zotumphukira za kojic acid zinayamba kupezeka. Ofufuza apanga zotumphukira zambiri za kojic acid kuti akonze magwiridwe antchito a kojic acid. Zotumphukira za kojic acid sizimangokhala ndi njira yoyera yofanana ndi ya kojic acid, komanso zimakhala ndi magwiridwe antchito abwino kuposa asidi wa kojic.
Pambuyo poyezera ndi kojic acid, monoester ya kojic acid imatha kupangidwa, ndipo diester imatha kupangidwanso. Pakadali pano, chinthu chodziwika kwambiri choyezera kojic acid pamsika ndi kojic acid dipalmitate (KAD), yomwe ndi diesterified derivative ya kojic acid. Kafukufuku akuwonetsa kuti mphamvu yoyera ya KAD yophatikizidwa ndi glucosamine derivatives idzawonjezeka kwambiri.

Kusamalira bwino khungu kwa kojic dipalmitate
1) Kuyeretsa: Kojic acid dipalmitate ndi yothandiza kwambiri kuposa kojic acid poletsa ntchito ya tyrosinase pakhungu, motero imaletsa kupangika kwa melanin, komwe kumakhudza bwino kuyeretsa khungu ndi mafuta oteteza ku dzuwa.
2) Kuchotsa ma freckle: Kojic acid dipalmitate ingathandize kusintha mtundu wa khungu, ndipo imatha kulimbana ndi mawanga okalamba, ma stretch marks, ma freckles ndi mtundu wonse wa khungu.

Buku lothandizira kukonza zodzoladzola la Dipalmitate
Kojic acid dipalmitateN'zovuta kuwonjezera mu fomula ndipo n'zosavuta kupanga mvula ya kristalo. Pofuna kuthetsa vutoli, tikukulimbikitsani kuwonjezera isopropyl palmitate kapena isopropyl myristate mu gawo la mafuta lomwe lili ndi kojic dipalmitate, kutentha gawo la mafuta kufika pa 80 ℃, kuisunga kwa mphindi 5 mpaka kojic dipalmitate itasungunuka kwathunthu, kenako onjezerani gawo la mafuta mu gawo la madzi, ndikuyiyika mu emulsify kwa mphindi pafupifupi 10. Kawirikawiri, pH ya chinthu chomaliza chomwe chapezeka ndi pafupifupi 5.0-8.0.
Mlingo woyenera wa kojic dipalmitate mu zodzoladzola ndi 1-5%; Onjezani 3-5% mu zinthu zoyera.