Qhov sib txawv tseem ceeb ntawm melanin thiab circadin yog melanin yog hom xim uas tsim hauv cov tsiaj hlwb, qhov circadin yog hom tshuaj hormones uas tsim hauv tsiaj, nroj tsuag, thiab kab mob.
Melanin thiab circadin yog cov organic tebchaw. Circadin yog lub npe lag luam rau melatonin hormone. Txawm hais tias lub npe melanin thiab melatonin suab cuam tshuam, lawv yog ob yam sib txawv uas tsim hauv cov kab mob nyob.
Melanin yog dab tsi?
Melanin yog ib pawg ntawm cov xim ntuj uas peb tuaj yeem pom hauv ntau yam kab mob. Cov xim no tsim los ntawm cov txheej txheem tshuaj muaj ob peb kauj ruam, thiab cov txheej txheem no hu ua melanogenesis. Hauv cov txheej txheem no, oxidation ntawm cov amino acid tyrosine tshwm sim, ua raws li cov tshuaj tiv thaiv polymerization. Qhov kev tsim cov xim melanin no tshwm sim hauv ib pawg ntawm cov hlwb hu ua melanocytes.
Daim duab 01: Cov Qauv Tshuaj ntawm Melanin
Peb tuaj yeem txheeb xyuas tsib hom melanin molecules hu ua eumelanin, pheomelanin, neuromelanin, allomelanin thiab pyomelanin. Ntawm cov hom no, feem ntau hom melanin pigment yog eumelanin, uas tseem muaj ob pawg hu ua xim av eumelanin thiab dub eumelanin. Ntxiv mus, pheomelanin yog derivative ntawm cysteine, thiab nws muaj polybenzothiazine. Neuromelanin tuaj yeem pom hauv lub hlwb. Allomelanin thiab pyromelanin yog nitrogen-dawb melanin pigments.
Melanin Ua li cas?
Kev tsim cov melanin hauv tib neeg daim tawv nqaij pib nrog rau qhov raug ntawm daim tawv nqaij rau UV hluav taws xob. Qhov kev tsim melanin no ua rau cov tawv nqaij ua kom tsaus. Txawm li cas los xij, melanin yog ib qho zoo absorbent ntawm lub teeb uas cov xim muaj peev xwm dissipate txog 99% ntawm absorbed UV hluav taws xob. Cov cuab yeej ntawm melanin no ua rau peb ntseeg tias nws tuaj yeem tiv thaiv peb cov tawv nqaij los ntawm UV hluav taws xob puas, uas tuaj yeem txo qhov kev pheej hmoo ntawm folate depletion thiab dermal degradation.
Ntxiv rau, melanin tuaj yeem ua cov tshuaj tiv thaiv antioxidant, thiab nws lub peev xwm antioxidant yog ncaj qha proportional rau qib ntawm polymerization. Raws li qee qhov kev tshawb fawb kev tshawb fawb, melanin muaj nyob rau hauv kev txhawb nqa ntawm kev sib txuas ntawm cov heteropolymer uas tau ua ke nrog covalently rau matrix scaffolding melanoproteins.
Circadin yog dab tsi?
Circadin yog lub npe lag luam rau melatonin, uas yog cov tshuaj hormone tso tawm los ntawm lub caj pas pineal thaum hmo ntuj thiab cuam tshuam nrog lub voj voog pw tsaug zog (nyeem: circadian atherosclerosis). Feem ntau, nws muaj nyob rau hauv cov khoom noj uas muaj txiaj ntsig zoo rau lub sijhawm luv luv ntawm kev kho insomnia. Muaj qee qhov kev mob tshwm sim ntawm cov tshuaj no uas suav nrog pw tsaug zog, mob taub hau, xeev siab, raws plab, xeev siab, ntxhov siab vim, migraine, lethargy, thiab lwm yam.
Daim duab 2: Biosynthesis ntawm Circadin
Thaum xav txog biosynthesis ntawm circadian, nws yog tsim nyob rau hauv cov tsiaj los ntawm hydroxylation, decarboxylation, acetylation, thiab methylation, uas pib nrog L-tryptophan. Ntxiv mus, L-tryptophan cov ntaub ntawv nyob rau hauv txoj kev shikimate los ntawm chorismite. Peb kuj tuaj yeem tau txais nws los ntawm cov protein catabolism. Txawm li cas los xij, hauv cov kab mob me xws li cov kab mob, cov kab mob, thiab hauv qee cov nroj tsuag, cov xim no ua tsis ncaj nrog tryptophan uas twb muaj lawm ua cov khoom nruab nrab ntawm txoj kev shikimate. Nyob ntawd, cov synthesis pib nrog D-erythrose 4-phosphate thiab phosphoenolpyrivate.
Qhov txawv ntawm Melanin thiab Circadin yog dab tsi?
Melanin thiab circadin yog cov organic tebchaw. Qhov sib txawv tseem ceeb ntawm melanin thiab circadin yog tias melanin yog hom xim uas tsim nyob rau hauv cov tsiaj hlwb, thaum circadin yog hom tshuaj hormones uas tsim hauv tsiaj, nroj tsuag, thiab kab mob. Ntxiv mus, lub melanin absorbs UV hluav taws xob thaum circadin pab tau nyob rau hauv lub pw tsaug zog-wake voj voog.
Cov infographic hauv qab no nthuav tawm qhov sib txawv ntawm melanin thiab circadin hauv daim ntawv tabular.
Summary – Melanin vs Circadin
Melanin thiab circadin yog cov organic tebchaw. Qhov sib txawv tseem ceeb ntawm melanin thiab circadin yog tias melanin yog hom xim uas tsim hauv cov tsiaj hlwb, qhov circadin yog hom tshuaj hormones uas tsim hauv tsiaj, nroj tsuag, thiab kab mob.
