{"id":50691,"date":"2010-12-09T10:08:56","date_gmt":"2010-12-09T08:08:56","guid":{"rendered":"http:\/\/www.nationalturk.com\/?p=50691"},"modified":"2010-12-09T10:08:56","modified_gmt":"2010-12-09T08:08:56","slug":"nasa-rezil-oldu-912201","status":"publish","type":"post","link":"https:\/\/www.nationalturk.com\/tr\/nasa-rezil-oldu-912201\/","title":{"rendered":"Nasa rezil oldu"},"content":{"rendered":"<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-50692\" title=\"nasa\" src=\"http:\/\/www.nationalturk.com\/tr\/wp-content\/uploads\/2010\/12\/nasa-267x220.jpg\" alt=\"\" width=\"267\" height=\"220\" srcset=\"https:\/\/www.nationalturk.com\/tr\/wp-content\/uploads\/2010\/12\/nasa-267x220.jpg 267w, https:\/\/www.nationalturk.com\/tr\/wp-content\/uploads\/2010\/12\/nasa.jpg 468w\" sizes=\"auto, (max-width: 267px) 100vw, 267px\" \/><br \/>\n<\/strong><\/p>\n<p>B\u00fcy\u00fck bir beklenti yaratarak ge\u00e7en hafta bir bas\u0131n toplant\u0131s\u0131 yapan NASA uzmanlar\u0131, California&#8217;daki Mono G\u00f6l\u00fc&#8217;nde arsenikte ya\u015fayabilen ve hatta arseni\u011fi DNA&#8217;s\u0131na katabilen &#8216;tuhaf bir ya\u015fam&#8217; t\u00fcr\u00fc ke\u015ffettiklerini az\u0131klam\u0131\u015ft\u0131.<br \/>\nAncak ara\u015ft\u0131rmay\u0131 okuyan bilim insanlar\u0131, &#8216;ke\u015ffe&#8217; yol a\u00e7an teknikte baz\u0131 ciddi hatalar\u0131 oldu\u011funu belirtiyor.<br \/>\nBritish Columbia \u00dcniversitesi&#8217;nden mikrobiyoloji profes\u00f6r\u00fc Rosie Redfield, kullan\u0131lan &#8220;tekni\u011fi g\u00f6r\u00fcnce \u015fok oldu\u011funu&#8221; belitiyor.<br \/>\nBilim insanlar\u0131 bakteriyi laboratuvar ortam\u0131nda geli\u015ftirmi\u015f ve azar azar mevcut fosfor miktar\u0131n\u0131 \u00e7ekerek yerine arsenik koymu\u015ftu. Sonu\u00e7ta fosfor olmadan bakterinin sadece arsenik ve oksijenle ya\u015fad\u0131\u011f\u0131 sonucuna ula\u015fm\u0131\u015flard\u0131.<br \/>\nAncak bilim insanlar\u0131, basit birka\u00e7 a\u015faman\u0131n takip edilmedi\u011fini ve bunlar\u0131n da bulgular\u0131n g\u00fc\u00e7l\u00fcl\u00fc\u011f\u00fcne g\u00f6lge d\u00fc\u015f\u00fcrd\u00fc\u011f\u00fcn\u00fc belirtiyor.<br \/>\nS\u00f6zgelimi, uzmanlara g\u00f6re, DNA bakteriden al\u0131n\u0131rken, ba\u015fka molek\u00fcller dikkatle temizlenmeli ve b\u00f6ylece \u00f6rne\u011fe bula\u015fma olmad\u0131\u011f\u0131ndan emin olunmas\u0131 gerekirdi.<br \/>\nHarvard mikrobiyolo\u011fu Alex Bradley ise bulgular hakk\u0131nda yazd\u0131\u011f\u0131 blogda, DNA&#8217;n\u0131n suda oldu\u011fundan, ya\u015fayabilmesinin nedeninin fosfat\u0131n varl\u0131\u011f\u0131ndan kaynaklanm\u0131\u015f olmas\u0131 gerekti\u011fini belirtiyor zira arseni\u011fin suda \u00e7\u00f6z\u00fcnd\u00fc\u011f\u00fcn\u00fc hat\u0131rlat\u0131yor.<br \/>\nAra\u015ft\u0131rman\u0131n detayl\u0131 bir analizi ayr\u0131ca bakterinin k\u00fc\u00e7\u00fck miktarlarda fosfat sayesinde hayatta kalabilmi\u015f olabilece\u011fini de g\u00f6steriyor. Bunun tuza bula\u015fmas\u0131 yoluyla ger\u00e7ekle\u015fmi\u015f olabilece\u011fi kaydediliyor.<br \/>\nBaz\u0131 uzmanlar ise \u00e7ok say\u0131da ba\u015fka bakteri t\u00fcr\u00fcn\u00fcn inan\u0131lmaz derecede d\u00fc\u015f\u00fck fosfor d\u00fczeylerinde ya\u015fayabildi\u011fini ve bu durumda da ayn\u0131s\u0131n\u0131n ge\u00e7erli olmu\u015f olabilece\u011fine dikkat \u00e7ekiyorlar.<br \/>\nColorado \u00dcniversitesi&#8217;nden mikrobiyolog Norman Pace, sert bir ele\u015ftiri yap\u0131yor: &#8220;Buradaki hikaye d\u00fc\u015f\u00fck d\u00fczeylerdeki fosfat\u0131n medya, toy ara\u015ft\u0131rmac\u0131lar ve k\u00f6t\u00fc ele\u015ftirmenler taraf\u0131ndan b\u00fcy\u00fct\u00fclmesidir.&#8221;<br \/>\nProfes\u00f6r Redfield blogunda, &#8220;Bol sa\u00e7malar, ama \u00e7ok az g\u00fcvenilir bilgi. E\u011fer bu bir doktora \u00f6\u011frencisi taraf\u0131ndan kurula sunulsa, daha fazla kontrol yap\u0131lmas\u0131 i\u00e7in geri g\u00f6nderirdim&#8221; diye yazd\u0131.<br \/>\nEle\u015ftirilere yan\u0131t olarak ABD Jeoloji Ara\u015ft\u0131rmalar\u0131&#8217;ndan ve ara\u015ft\u0131rmac\u0131 ekiqten Ronald Oremland, &#8220;E\u011fer hatal\u0131ysak, o halde bu, di\u011fer bilim insanlar\u0131 i\u00e7in bulgular\u0131m\u0131z\u0131 yeniden \u00fcretmek \u00fczere bir te\u015fvik niteli\u011finde olmal\u0131. E\u011fer hakl\u0131ysak (ki ben \u00f6yle oldu\u011fumuza \u015fiddetle inan\u0131yorum) o halde rakiplerimiz bu fenomeni anlamam\u0131za yard\u0131m etmeyi kabul edecektir&#8221; dedi.<\/p>\n<!-- Error, Advert is not available at this time due to schedule\/geolocation restrictions! -->\n","protected":false},"excerpt":{"rendered":"<p>NASA&#8217;n\u0131n b\u00fcy\u00fck heyecan yaratan, fakat daha sonra arsenikte ya\u015fayabilen tuhaf bir canl\u0131n\u0131n ke\u015ffedildi\u011finin anla\u015f\u0131lmas\u0131yla &#8216;D\u00fcnya d\u0131\u015f\u0131 ya\u015fam\u0131n bulunmas\u0131n\u0131&#8217; bekleyenlerin hayal k\u0131r\u0131kl\u0131\u011f\u0131na u\u011framas\u0131na neden olan ara\u015ft\u0131rmas\u0131, \u00f6nde gelen bilim insanlar\u0131n\u0131n ciddi ele\u015ftirilerinin hedefi oldu<\/p>\n","protected":false},"author":4,"featured_media":50692,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6768,6665,5005,6224],"tags":[56219,56223,23607,56221,56224,546,56222],"class_list":["post-50691","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amerika","category-dunya","category-manset","category-teknoloji","tag-arsenik","tag-bakteri","tag-dna","tag-dunya-disi-yasam","tag-mikrobiyoloji","tag-nasa","tag-umitler-suya-dustu"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/posts\/50691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/comments?post=50691"}],"version-history":[{"count":0,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/posts\/50691\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/media\/50692"}],"wp:attachment":[{"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/media?parent=50691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/categories?post=50691"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nationalturk.com\/tr\/wp-json\/wp\/v2\/tags?post=50691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}