Da'da taariikhiga ah waxaa loola jeedaa waqtiga dhabta ah ee qofka noolaa. Si kale haddii loo dhigo, tirada maalmaha, bilaha ama sanadka qofku wuu noolaan waayey , iyada oo aan loo eegin sida caafimaadku u yahay hab nololeed - xitaa mid ay ka buuxsamaan jimicsi weyn iyo nafaqo wanaagsan - way nool yihiin.
Qof kasta wuxuu udhigaa heerar kala duwan. Dadka qaarkiis waxay u muuqdaan kuwo aad u dhaqso badan, halka kuwa kale ay la kulmaan da 'ahaan qiyaas aad u sarreeya.
Dhamaanteen waxaan kulannay waayo-aragnimo qof marka ugu horeysa ee u muuqda in uu aad u yaryahay - ama ka weyn - intay run ahaantii yihiin.
Farqiga u dhexeeya Da'da Xoolaniga iyo Biyolojiga
Sida aadanuhu, waxaan leenahay labo da' kala duwan: taariikh ahaan iyo taariikh nololeed. Da'da taariikheed ee taariikhda qofku wuu noolaa, halka da'da noolaha ay ka hadlaan sida da'doodu u muuqato . Da'da bayoolajiga, oo sidoo kale loo yaqaan da'da jireed, waxay qaadataa waxyaabo badan oo hab nololeed oo tixgelin ah, oo ay ku jiraan cunno, jimicsi iyo caadooyin hurdo, si loogu magacaabo dhowr.
Sidee da'da ay uga fog tahay xakameynteena. Cilmi-baaristii ugu dambaysay waxay saameyn ku yeelataa sida gabowga ay saameyn ku yeelan karto arrimaha dibadda, oo ay ku jiraan cuntada, jimicsiga, culeyska, iyo sigaarka. Dad badan oo ku takhasusay cilmi-yaqaanka waxay rumaysan yihiin da'da taariikheed inay noqdaan kuwo aan dhammeystirnayn sababtoo ah maaha arrimahan dibadda.
Sidee bay u xakameyneysaa?
Cilmi baaris ayaa soo jeedinaysa in telomeriyeyaasha iyo methyl DNA ay qaybo badan ka ciyaaraan geedi socodka gabowga.
Telomerisku waa nukleotides ku yaala dhamaadka koromosoomyada. Waxay ku hayaan dariiqooyinka koromosoomyada oo ka sii daraya oo ay la socdaan kromosome ku dhow. Dhab ahaantii, telomerisku waxay xustay sida ugu dhakhsaha badan unugyada da'da oo u dhinta.
Cilmi-baadhayaashu waxay ogaadey in da'da qofka dareen-wakhti dheer, ay ka gaabisaa telomer-yadooda.
Mid ka mid ah daraasaddan ayaa lagu ogaaday in dadka qaba telomer-yada gaaban ay u badan tahay inay geeriyoodaan hore ama ay yeeshaan cudur ama cillad maskaxeed. Daraasad kale waxay soo jeedinaysaa in ilaalinta qaab nololeed caafimaad leh ay dhab ahaantii dib u soo celin karaan da 'yareeya adoo adeegsanaya telefishinka, warka wanaagsan ee dhaqankeena da'da yar.
Cilmi-baarayaashu sidoo kale waxay isticmaalaan methylation DNA si ay u go'aamiyaan da'da noolaha. Unugyada ayaa isticmaalaya methylation DNA si loo xakameeyo muujinta hidda. Si kale haddii loo dhigo, methyl DNA wuxuu isu beddelaa gen. Inkasta oo ujeedada dhabta ah ee methylation aan la garanayn, waa muhiim in horumarinta embriyaha, rikoorada genomic, xasilinta chromosome iyo waxyaabo kale oo badan.
Hal daraasad ayaa raba in la ogaado in miyirka DNA uu yahay hab sax ah oo lagu saadaalin karo da'da isagoo soo ururinaya 8,000 oo shaybaar oo 51 unugyo iyo unugyo kala duwan. Inta badan unugyada unugyada iyo unugyada unugyada ayaa la baadhay isla sannadihii hore iyo taariikhda nafleyda. Qaarkood ma aysan sameyn. Daraasadu waxay ogaatay in qaybo ka mid ah jirku uu ka dhaqso badan yahay kuwa kale. Tusaale ahaan, unugyada naasku waa qaar ka mid ah unugyada ugu da'da weyn ee jirka. Cilmi-baadhistu waxay ogaatay in xitaa unugyada naasaha caafimaad leh ay noqon karaan ilaa saddex sano oo ka weyn inta ka dhiman jirka haweeneyda. Haddii nudaha naasaha caafimaadku uu jiro meel u dhow unugyada kansarka, waa celcelis 12 sano ka weyn .
Haddii aad xiiseyneyso in aad raadiso da'da nafleyda, sii wad nafsadaada RealAge , khayraad dheer oo cajiib ah.
> Ilo:
> http://www.healio.com/optometry/low-vision-geriatrics/news/print/primary-care-optometry-news/%7B94d8411e-1cad-4070-b7b5-576f058645e7%7D/look-beyond-a- bukaanka-taariikh ahaan-da'da
> http://www.medicaldaily.com/human-bodys-chronological-and-biological-age-may-differ-why-your-breast-tissues-are-326884