NICOTINAMIDE
Kev Taw Qhia
Niacinamide, tseem hu ua nicotinamide, vitamin B3 lossis vitamin PP, yog cov vitamin uas yaj hauv dej thiab yog cov vitamins B. Qhov niacinamide hauv ob lub qauv coenzyme no hauv tib neeg lub cev muaj cov yam ntxwv ntawm kev ntxiv hydrogen thiab dehydrogenation, uas ua lub luag haujlwm hauv kev oxidation ntawm cov kab mob. Kev sib kis hydrogen tuaj yeem txhawb kev ua pa ntawm cov ntaub so ntswg, cov txheej txheem oxidation ntawm cov kab mob thiab kev ua haujlwm ntawm lub cev, uas yog qhov tseem ceeb rau kev tswj hwm kev ncaj ncees ntawm cov ntaub so ntswg ib txwm muaj, tshwj xeeb tshaj yog daim tawv nqaij, txoj hnyuv zom zaub mov thiab lub paj hlwb. Thaum nws tsis txaus, nws ua rau prosthema vim tias kev ua pa thiab kev ua haujlwm ntawm cov hlwb raug cuam tshuam.
Cov khoom siv tshuaj lom neeg
Niacinamide yog ib qho siv lead ua dawb zoo li koob lossis hmoov crystalline, tsis muaj ntxhiab lossis me ntsis tsw, thiab me ntsis iab. Qhov ceev ntawm qhov sib piv yog 1.4, thiab qhov melting point yog 129-131 ℃. 1g ntawm cov khoom no yaj tau hauv 1mL dej, 1.5mL ntawm ethanol lossis 10mL ntawm glycerine, thiab tsis yaj hauv ether. Nws ruaj khov heev. Nws tiv taus acid, alkali thiab kub siab. Nws ruaj khov rau lub teeb thiab cua sov hauv huab cua qhuav. Thaum rhaub hauv alkaline lossis acidic kua, nws tsim niacin.
Kev ua haujlwm ntawm lub cev
Muaj peev xwm tiv thaiv kev laus zoo Lub peev xwm tiv thaiv kev laus ntawm niacinamide yog tias nws tuaj yeem ua kom ChemicalbookATP ua haujlwm, muab lub zog rau cov hlwb keratin, ua rau muaj kev sib xyaw ntawm collagen, thiab muaj kev sib koom tes zoo, uas tuaj yeem siv nrog lwm cov khoom xyaw tiv thaiv kev laus. Ntau txoj kev tshawb fawb hauv tsev thiab txawv teb chaws tau qhia tias niacinamide tuaj yeem txo qhov tshwm sim ntawm lub teeb tawv nqaij tiv thaiv kab mob hauv qab ultraviolet irradiation.
