Cov txheej txheem:
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Kev txhais lus ntawm Melanin
Melanin : Cov xim uas muab rau tib neeg tawv nqaij , plaub hau, thiab qhov muag lawv cov xim. Cov neeg tawv tawv muaj ntau dua melanin hauv lawv tawv nqaij tshaj li cov neeg tawv nqaij muaj. Melanin yog tsim los ntawm cov hlwb hu ua melanocytes
Dhau li ntawm no, haiv neeg twg muaj melanin tshaj plaws?
African thiab Indian tawv nqaij muaj qhov siab tshaj tag nrho tus nqi ntawm melanin nyob rau hauv lub epidermis (t-test; P <0.001), tsis muaj qhov sib txawv tseem ceeb ntawm lawv.
Tom qab ntawd, lo lus nug yog, dab tsi ua rau melanin? Melanin yog cov xim uas tsim los ntawm cov hlwb hu ua melanocytes hauv daim tawv nqaij ntawm cov tsiaj feem ntau. Nws los hauv ob daim ntawv yooj yim: eumelanin (xim xim av) thiab pheomelanin (xim liab-xim av xim). Kev tsim tawm ntawm melanin raug cuam tshuam los ntawm kev raug UV, kev tsim caj ces, qhov loj ntawm melanocytes, thiab kab mob.
Qhov thib ob, kuv tuaj yeem txo melanin hauv kuv cov tawv nqaij li cas?
Tej yam tshuaj kho kom txo melanin hauv daim tawv nqaij:
- Thov Avocado Pulp: Siv qee cov hmoov avocado ua rau cov tawv nqaij ua rau tawv nqaij thiab saib nws ci.
- RUB Nyob rau hauv Unpasteurized Soy Milk: siv me ntsis kua mis tsis tau pasteurized rau thaj chaw pigmented.
- Slather On Some Turmeric Paste: Sib tov cov hmoov turmeric thiab mis nyuj ua kom tuab.
Yuav ua li cas melanin txiav txim cov xim ntawm daim tawv nqaij?
Melanin yog tsim nyob rau hauv lub tawv nqaij hauv cov hlwb hu ua melanocytes thiab nws yog lub hauv paus tseem ceeb ntawm tawv nqaij xim ntawm cov neeg tawv nqaij tawv. Cov tawv nqaij xim ntawm cov neeg nrog lub teeb tawv nqaij yog txiav txim siab Feem ntau los ntawm xiav-dawb cov ntaub so ntswg nyob rau hauv lub dermis thiab hemoglobin circulating nyob rau hauv cov hlab ntsha ntawm lub dermis.
Pom zoo:
Dab tsi yog txheej txheej sab saum toj ntawm daim tawv nqaij nyob ib sab ntawm daim tawv nqaij?
Lub dermis txuas cov epidermis mus rau hypodermis, thiab muab lub zog thiab kev ywj pheej vim muaj cov collagen thiab elastin fibers. Nws tsuas muaj ob txheej: txheej txheej papillary nrog papillae uas nthuav mus rau hauv daim tawv nqaij thiab qis dua, txheej txheej reticular uas muaj cov ntaub so ntswg sib txuas xoob
Dab tsi yog qhov txawv ntawm daim tawv nqaij thiab daim tawv nqaij daim ntawv xeem?
Qauv: Sib sib zog nqus ntawm daim tawv nqaij; connective ntaub so ntswg muaj li ntawm ob txheej. Muaj nuj nqi: Muaj lub luag haujlwm rau cov txheej txheem muaj zog thiab yoog raws ntawm daim tawv nqaij; lub epidermis pauv cov pa roj, cov khoom noj, thiab cov khoom pov tseg nrog cov hlab ntsha hauv lub dermis
Puas yog lo lus dav dav txhais tau tias yog mob ntawm daim tawv nqaij lossis pob khaus uas tuaj yeem muaj ntau yam ua rau nws yog ib qho cim ntawm ntau hom tawv nqaij tsis xws luag?
Dermatitis yog lo lus dav dav uas piav txog kev ua rau tawv nqaij. Dermatitis yog ib yam mob uas muaj ntau yam ua rau thiab tshwm sim ntau yam. Nws feem ntau yog khaus, tawv nqaij qhuav los yog pob khaus ntawm daim tawv nqaij o, reddened
Npaum li cas ntawm daim tawv nqaij thiab daim tawv nqaij?
txog 2 hli Ua raws li qhov no hauv kev txiav txim siab, tuab npaum li cas ntawm cov epidermis nyob tom qab? Dermis thiab subcutaneous rog Nws yog tuab (nruab nrab 1 txog 4 hli) tshaj li daim tawv nqaij uas yog hais txog nyias li daim ntawv.
Hom ntaub so ntswg twg ua rau daim tawv nqaij ntawm daim tawv nqaij?
Lub epidermis yog tsim los ntawm stratified squamous epithelium. Lub dermis muaj cov ntaub so ntswg sib txuas, cov leeg nqaij du, thiab cov paj hlwb