I-NICOTINAMIDE
Isingeniso
I-Niacinamide, eyaziwa nangokuthi i-nicotinamide, i-vitamin B3 noma i-vitamin PP, iyi-vitamin encibilika emanzini futhi ingeye-vithamini B. Ingxenye ye-niacinamide kulezi zakhiwo ezimbili ze-coenzyme emzimbeni womuntu inezakhiwo zokwengeza i-hydrogen ye-Chemicalbook kanye ne-dehydrogenation, edlala indima ekushisweni kwe-bio. Ukudluliswa kwe-hydrogen kungakhuthaza ukuphefumula kwezicubu, inqubo ye-bioligious oxidation kanye ne-metabolism, okubaluleke kakhulu ekugcineni ubuqotho bezicubu ezijwayelekile, ikakhulukazi isikhumba, umgudu wokugaya ukudla kanye nesistimu yezinzwa. Uma intuleka, ibangela i-prosthema ngoba ukuphefumula kanye ne-metabolism yamaseli kuyathinteka.
Izakhiwo zamakhemikhali
I-Niacinamide iyi-crystal emhlophe efana nenaliti noma impuphu ekristalu, ayinaphunga noma inephunga elincane, futhi iyababa kancane. Ubuningi obuhlobene bungu-1.4, kanti iphuzu lokuncibilika lingu-129-131℃. I-1g yalo mkhiqizo iyancibilika ku-1mL yamanzi, i-1.5mL ye-ethanol noma i-10mL ye-glycerine, futhi ayincibiliki ku-ether. Izinzile. Ayimelani ne-asidi, i-alkali kanye nokushisa okuphezulu. Izinzile ekukhanyeni nasekushiseni emoyeni owomile. Uma ishiswa ezixazululweni ze-alkaline noma ze-asidi, ikhiqiza i-niacin.
Umsebenzi we-physiological
Amandla amahle okulwa nemibimbi Amandla e-niacinamide okulwa nemibimbi ukuthi ingenza kusebenze i-ChemicalbookATP, inikeze amandla kumaseli e-keratin, yandise ukwakheka kwe-collagen, futhi inokubambisana okuhle, okungasetshenziswa nezinye izithako zokulwa nemibimbi. Izifundo eziningi ekhaya nakwamanye amazwe zikhombisile ukuthi i-niacinamide inganciphisa ngempumelelo ukuvela kokucindezeleka kokukhanya kwesikhumba ngaphansi kwemisebe ye-ultraviolet.
