{"id":4861,"date":"2025-03-31T16:15:14","date_gmt":"2025-03-31T16:15:14","guid":{"rendered":"https:\/\/xn--sba-ona.ee\/uncategorized\/fakt-teadust-paevas-kui-kaua-sailib-luudes-dna\/"},"modified":"2025-03-31T16:15:14","modified_gmt":"2025-03-31T16:15:14","slug":"fakt-teadust-paevas-kui-kaua-sailib-luudes-dna","status":"publish","type":"post","link":"https:\/\/xn--sba-ona.ee\/en\/blog\/fakt-teadust-paevas-kui-kaua-sailib-luudes-dna\/","title":{"rendered":"Fakt teadust p\u00e4evas: kui kaua s\u00e4ilib luudes DNA?"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1320.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>Vastus:&nbsp;DNA s\u00e4ilimist luudes m\u00f5jutavad v\u00e4ga paljud tegurid. K\u00f5ige vanem isend, kellelt on p\u00e4rilikkusmaterjali saadud, on miljoni aasta vanune mammut.<\/p>\n<div class=\"article-main--content formatted--content\">\n<p>DNA s\u00e4ilivusuuringuid on tehtud nii looma- kui ka inimluude alusel. N\u00e4iteks on vaadeldud, kui palju on proovis alles selle looma v\u00f5i inimese enda DNA-d, milliseid muutusi on DNA-s aja jooksul toimunud ja kui pikad on DNA s\u00e4ilinud osad. Vanadest leidudest \u2013 n\u00e4iteks luudest, hammastest, juustest v\u00f5i mumifitseeritud kudedest \u2013 saadud DNA on sageli lagunenud v\u00e4ikesteks t\u00fckkideks.<\/p>\n<\/div>\n<div class=\"article-main--content formatted--content\">\n<p>DNA s\u00e4ilib paremini k\u00fclmas ja kuivas keskkonnas kui soojas ja niiskes. Oluline on ka stabiilne temperatuur, sest suured k\u00f5ikumised kiirendavad lagunemist. Viimastel aastatel on aga \u00f5nnestunud eraldada vana DNA-d ka sooja kliimaga aladelt. Sellegipoolest p\u00e4rinevad siiani vanimad DNA proovid just igikeltsast: n\u00e4iteks 735 000 aastat vanalt Alaska hobuslaselt ja miljoni aasta vanuselt mammutilt.<\/p>\n<\/div>\n<div class=\"article-main--content formatted--content\">\n<p>Vana DNA s\u00e4ilimist m\u00f5jutab ka see, kuidas luid hoitakse ja t\u00f6\u00f6deldakse. Olulised tegurid on konserveerimismeetodid, hoiustamistemperatuur ja niiskus. Samuti m\u00e4ngivad rolli laborites kasutatavad tehnikad ja materjalid. P\u00f5letatud luudest pole seni \u00f5nnestunud DNA-d leida, sest kuumus h\u00e4vitab orgaanilise aine. Samuti v\u00f5ivad seened ja bakterid lagundada luu sees olevat kollageeni ja DNA-d, muutes luu hapramaks.<\/p>\n<\/div>\n<div class=\"article-main--content formatted--content\">\n<p>Minu uuring Eesti arheoloogilistest luudest k\u00e4sitles vana DNA s\u00e4ilivust ja seda m\u00f5jutavaid tegureid. Tulemused n\u00e4itasid, et DNA s\u00e4ilivust m\u00f5jutavad mulla t\u00fc\u00fcp ja matmisviis, samas kui hoiustamise kestusel m\u00f5ju ei olnud. Kokkuv\u00f5ttes s\u00f5ltub DNA s\u00e4ilimine luu omadustest, vanusest ja sellest, kuidas luid on hoitud enne ja p\u00e4rast seda, kui arheoloogid on need v\u00e4lja kaevanud.<\/p>\n<p>Mairi Kaseorg,&nbsp;<a href=\"https:\/\/www.ohtuleht.ee\/1125036\/fakt-teadust-paevas-kui-kaua-sailib-luudes-dna\">https:\/\/www.ohtuleht.ee\/1125036\/fakt-teadust-paevas-kui-kaua-sailib-luudes-dna<\/a><\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":4862,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[51],"tags":[],"class_list":["post-4861","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/posts\/4861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/comments?post=4861"}],"version-history":[{"count":0,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/posts\/4861\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/media\/4862"}],"wp:attachment":[{"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/media?parent=4861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/categories?post=4861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xn--sba-ona.ee\/en\/wp-json\/wp\/v2\/tags?post=4861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}