Phloretinyog hom tshiab ntawm cov tawv nqaij ntxuav hniav dawb tus neeg sawv cev tsis ntev los no tau tsim, feem ntau tau faib rau hauv cov tev thiab cag tawv ntawm cov kua txiv hmab txiv ntoo xws li txiv apples thiab pears. Phhroretin tuaj yeem siv rau lub ntsej muag lub ntsej muag, tshuaj pleev tawv nqaij, pleev tshuaj pleev thiab pleev.
Tib neeg daim tawv nqaij tsuas yog tsim los ntawm plaub xim xim: melanin, liab oxygenated hemoglobin, xiav txo hemoglobin, carotene daj thiab bile xim, thiab qhov sib txawv ntawm cov xim tawv nqaij ntawm txhua tus neeg yog tsuas yog txiav txim siab los ntawm melanin.
Melanin nyob rau hauv daim tawv nqaij yog synthesized los ntawm melanocytes uas muaj nyob rau hauv txheej hauv qab ntawm txheej epidermis. Txhawm rau nws yooj yim, cov txheej txheem no pib nrog tyrosine, thiab nyob rau hauv catalysis ntawm tyrosinase, nws dhau ntawm cov txheej txheem ntawm cov kev tiv thaiv oxidation thiab thaum kawg ua melanin. Txawm hais tias peb yog haiv neeg twg los xij, pes tsawg tus melanocytes hauv daim tawv nqaij yuav luag zoo ib yam. Hauv cov txheej txheem tsim ntawm melanin, qhov kev ua haujlwm ntawm tyrosinase ua lub luag haujlwm tseem ceeb.
Tyrosine thaum kawg ua cov melanin los ntawm kev ua kom muaj cov oxidation. Yog li no, yog tias nws tuaj yeem txo qhov siab oxidative ntawm daim tawv nqaij, nws yuav tsis tsuas yog ua rau cov tshuaj tiv thaiv oxidation, tab sis kuj tshem tawm qee yam khoom nruab nrab uas twb tau oxidized thiab cov uas tau tsim tawm. Melanin yog txo rov qab, thiab melanin ncav cuag lub ntsej muag ntawm daim tawv nqaij thaum kawg txo. Tsis muaj kev ntseeg tias cov tshuaj antioxidants yog txoj hauv kev ua kom cov tawv nqaij ntxuav hniav dawb.
Cov kev tshawb fawb pom tau tias phloretin muab rho tawm los ntawm cov khoom siv txiv ntoo thiab tev ntawm txiv apples yog tseem muaj tshuaj tua kab mob zoo. Nws tuaj yeem thaiv qhov kev ua haujlwm ntawm tyrosinase, txo qis UV-vim melanin ntau lawm, thiab txo qis UV tsim cov tawv nqaij erythema, thiab tseem ceeb tshaj, nws tseem tuaj yeem txhawb kev nkag mus ntawm lwm cov khoom xyaw hauv cov qauv.
Flavia
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