Qhov sib txawv tseem ceeb ntawm Kojic acid thiab hydroquinone yog kojic acid muaj qhov sib piv qeeb qeeb ntawm kev ua haujlwm thiab ua haujlwm qis dua li hydroquinone.
Y Kojic acid yog tshuaj zoo ib yam li hydroquinone, tab sis lawv yog ob yam tshuaj sib txawv. Yog li ntawd, lawv muaj cov khoom sib txawv thiab. Thaum siv cov khoom tu tawv nqaij ua cov khoom xyaw, ob qho tshuaj no tuaj yeem ua haujlwm tau zoo rau hyperpigmentation nrog cov txiaj ntsig sib txawv.
YKojic Acid yog dab tsi?
Y Kojic acid yog tus neeg sawv cev chelation uas tsim los ntawm cov khoom lag luam fermentation ntawm m alting mov siv hauv Japanese nplej wine. Qhov no yog ib qho acidic compound tsim los ntawm cov kab mob hu ua Aspergillus oryzae. Cov fungus no muaj lub npe Japanese "koji." Kojic acid tuaj yeem ua raws li cov tshuaj tiv thaiv me me rau kev tsim cov pigments hauv cov nroj tsuag thiab tsiaj cov ntaub so ntswg. Nws kuj tseem muaj txiaj ntsig hauv kev tsim cov khoom noj thiab tshuaj pleev ib ce ua tus neeg sawv cev los tiv thaiv kev hloov xim ntawm cov khoom.
Daim duab 01: Kojic Acid
Cov tshuaj formula ntawm kojic acid yog C6H6O4 Nws molar mass yog 142 g/mol. Nws zoo nkaus li cov khoom dawb dawb uas yog me ntsis dej-soluble. Kojic acid yog tsim los ntawm dehydratase enzyme ua rau cov piam thaj. Tab sis, pentoses kuj tuaj yeem ua raws li qhov ua ntej rau qhov sib xyaw no.
Cov ntawv thov ntawm kojic acid suav nrog kev tiv thaiv oxidative browning thaum txiav txiv hmab txiv ntoo, khaws cov xim liab thiab xim liab hauv cov nqaij nruab deg, ua kom tawv nqaij tawv thaum siv tshuaj pleev ib ce, thiab kho cov kab mob ntawm daim tawv nqaij xws li melasma. Nws kuj tau siv rau kev tshawb fawb lub hom phiaj los tiv thaiv Suav hamster zes qe menyuam ntawm ionizing hluav taws xob.
Y Hydroquinone yog dab tsi?
Hydroquinone yog ib qho tshuaj tsw qab uas muaj cov tshuaj formula C6H4(OH)2Nws yog lub npe hu ua benzene-1, 4-diol lossis quinol. Cov tshuaj no yog benzenediol tsim los ntawm benzene core nqa ob hydroxy substituents nyob rau hauv para txoj hauj lwm rau ib leeg. Nws yog ib qho tshuaj tsw qab thiab ib hom phenol. Nws tseem yog derivative ntawm benzene. Qhov nruab nrab qhov hnyav ntawm cov tshuaj no yog 110.11 g / mol. Nws yog odorless tab sis me ntsis iab saj hauv aqueous daws. Lub boiling point ntawm hydroquinone yog nyob rau hauv thaj tsam ntawm 285-287 degrees Celsius. Lub melting point ntawm no compound yog nyob rau hauv ntau ntawm 170-171 degrees Celsius.
Daim duab 02: Dehydrogenation ntawm Hydroquinone
Hydroquinone tshwm sim raws li cov khoom dawb dawb. Muaj qee qhov kev hloov pauv ntawm qhov sib xyaw no uas tseem hu ua hydroquinones. Peb tuaj yeem tsim hydroquinone los ntawm ob txoj kev loj.
thawj txoj hauv kev zoo ib yam li cov txheej txheem cumene cuam tshuam nrog kev hu xov tooj ntawm benzene nrog propene muab 1, 4-diisopropylbenzene. Cov tshuaj no ces reacts nrog huab cua, ua rau bis (hydroperoxide). Qhov kev sib xyaw ua ke no zoo ib yam li cumene hydroperoxide. Nws undergoes rearrangement nyob rau hauv acid los tsim acetone thiab hydroquinone. Lwm txoj kev ntawm kev tsim khoom yog hydroxylation ntawm phenol tshaj ib qho catalyst.
Tseem muaj qee qhov chaw ntuj tsim hydroquinone. Nws yog ib qho ntawm ob qho tseem ceeb reagents nyob rau hauv cov qog tiv thaiv nyob rau hauv bombardier beetles, nrog rau hydrogen peroxide.
Muaj ntau cov ntawv thov tseem ceeb ntawm hydroquinone: ua cov tshuaj tua kab mob antioxidant, cov kab mob carcinogenic, xws li Escherichia coil metabolite, tib neeg xenobiotic metabolite, nas metabolite, cofactor xav tau rau kev ua haujlwm enzyme, ua cov tawv nqaij lightening tus neeg sawv cev hauv cov khoom tu tawv nqaij, etc.
Qhov txawv ntawm Kojic Acid thiab Hydroquinone yog dab tsi?
Y Kojic acid thiab hydroquinone yog cov organic sib txuas tseem ceeb uas siv los ua cov khoom xyaw hauv cov khoom tu tawv nqaij. Qhov sib txawv tseem ceeb ntawm Kojic acid thiab hydroquinone yog kojic acid muaj qhov sib piv qeeb qeeb ntawm kev ua haujlwm thiab ua haujlwm qis dua li hydroquinone.
Cov hauv qab no infographic nthuav tawm qhov sib txawv ntawm Kojic acid thiab hydroquinone hauv daim ntawv tabular rau kev sib piv ntawm ib sab.
Summary – Kojic Acid vs Hydroquinone
Y Kojic acid yog tus neeg sawv cev chelation uas tsim los ntawm cov khoom lag luam ntawm fermentation ntawm m alting mov siv rau Japanese nplej wine thaum hydroquinone yog cov tshuaj tsw qab uas muaj cov tshuaj formula C
6 H 4(OH)2 Qhov sib txawv tseem ceeb ntawm Kojic acid thiab hydroquinone yog tias kojic acid muaj qhov pib qeeb qeeb ntawm kev ua haujlwm thiab qis dua li hydroquinone.
