Yerevan, 05.February.2026,
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Lavrov: Russia intends to outline concrete steps to resolve issues in Karabakh Armenia President signs decree on calling snap parliamentary elections on June 20 Armenia President petitions to Constitutional Court Armenia legislature convenes special session to consider new Electoral Code Latvia parliament recognizes Armenian Genocide 145 new cases of COVID-19 confirmed in Armenia Armenia acting Deputy PM receives Iran Ambassador Azerbaijanis advance in territory of Nor Ghazanchi village of Karabakh's Martakert again, negotiations underway Lebanon official to Armenians: You were killed by sword, we—by famine, blockade, but culprit is one Al-Arabia: 10,000 people parade with torches in Yerevan in memory of 1.5 million Armenians killed in Ottoman Turkey Greek PM expects to meet with Erdogan in the near future Armenia Ombudsman on protest held in front of Prosecutor General's Office


Վաղաժամ սպիտակելու պատճառն արդեն բացահայտվել է

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Past.am-ը ձեր ուշադրությանն է ներկայացնում  վաղաժամ սպիտակելու պատճառնները. 

Երկիր մոլորակի բնակչության մեծ մասին հետաքրքրում է մազերի վաղաժամ սպիտակելու պատճառը: Բժիշկները տարիներ շարունակ հետազոտել և պարզել են, որ մազերի պիգմենտացիայի համար պատասխանատու է Wnt սպիտակուցը, որը վերահսկում է մարդու օրգանիզմի բիոլոգիական բազմաթիվ գործընթացներ:
 
Գիտնականները մի քանի տասնամյակ առաջ արդեն գիտեին, որ մազերը ներկելիս փոխազդեցության մեջ են գտնվում ֆոլիկուլների ցողունային բջիջները և պիգմենտ վերարտադրող melanocyte բջիջները: Բայց պատճառները, որ ընկած էին պիգմենտացիայի հիմքում, բացահայտված չէին: Գիտնականների խոսքով՝ հենց Wnt սպիտակուցի բացակայությունն է «ստիպում» մազերին փոխել իրենց սկզբնական գույնն ու ճերմակել:
 
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Նախկինում կարծում էին, որ մազերի ճերմակելու գործընթացում կարևոր դեր են խաղում երկու տարբեր բջիջներ, իսկ հիմա արդեն ակնհայտ է, որ այդ գործընթացում իր դերն ունի Wnt-ն:
 
Картинки по запросу mazeri vaxajam spitakum
 
 
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