{"id":9826,"date":"2011-03-01T17:56:40","date_gmt":"2011-03-01T15:56:40","guid":{"rendered":"http:\/\/109.232.216.219\/~bilimvegelecek\/?p=9826"},"modified":"2017-05-21T18:01:42","modified_gmt":"2017-05-21T15:01:42","slug":"paleozoik-fosillerde-dis-iskelet-kalintilari-bulundu","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2011\/03\/01\/paleozoik-fosillerde-dis-iskelet-kalintilari-bulundu","title":{"rendered":"Paleozoik fosillerde d\u0131\u015f iskelet kal\u0131nt\u0131lar\u0131 bulundu"},"content":{"rendered":"

Yeni yap\u0131lan bir \u00e7al\u0131\u015fmada paleozoik d\u00f6neme ait eklembacakl\u0131 fosillerinde protein ve polisakkaritlerden olu\u015fan kitin-protein kompleksine rastland\u0131. Bug\u00fcne kadar kitin-protein kompleksinin g\u00f6r\u00fcld\u00fc\u011f\u00fc en ya\u015fl\u0131 fosiller 25 milyon ya\u015f\u0131ndaki senozoik fosillerdi. 80 milyon ya\u015f\u0131ndaki senozoik fosillerde de yap\u0131sal protein kal\u0131nt\u0131lar\u0131na rastlanm\u0131\u015ft\u0131. Geology<\/em> dergisinde yay\u0131mlanan ara\u015ft\u0131rma sonu\u00e7lar\u0131n\u0131n organik fosil kay\u0131tlar\u0131na b\u00fcy\u00fck katk\u0131 sa\u011flayaca\u011f\u0131 bildiriliyor. Eklembacakl\u0131lar ortak bir \u00f6zellik olarak d\u0131\u015f iskelete ya da k\u00fctik\u00fcle sahipler. K\u00fctik\u00fcllerin d\u0131\u015f k\u0131s\u0131mlar\u0131 protein matriksine g\u00f6m\u00fclm\u00fc\u015f olarak bulunan kitin liflerinden olu\u015fuyor. Kitin ve yap\u0131sal proteinlerin mikroorganizmalar taraf\u0131ndan kolayl\u0131kla y\u0131k\u0131mland\u0131\u011f\u0131 bilindi\u011finden, bu yap\u0131lara erken Paleozoik d\u00f6nem fosillerinde bile rastlanamayaca\u011f\u0131 d\u00fc\u015f\u00fcn\u00fcl\u00fcyordu.<\/p>\n

George Cody ve ara\u015ft\u0131rma ekibi Illinois\u2019te bulunan 310 milyon ya\u015f\u0131ndaki bir akrep k\u00fctik\u00fcl\u00fcn\u00fc ve Ontario\u2019da bulunan 417 milyon ya\u015f\u0131ndaki bir eurypteridin (nesli t\u00fckenmi\u015f akrep benzeri bir eklembacakl\u0131) kal\u0131nt\u0131lar\u0131n\u0131 incelediler. Fosillerde bulunan karbon, nitrojen ve oksijen atomlar\u0131ndaki d\u00fc\u015f\u00fck enerjili X-\u0131\u015f\u0131nlar\u0131n\u0131n d\u00fczenlenme \u00f6l\u00e7\u00fcmleri sonucunda, bu atomlar\u0131n \u00e7o\u011funun protein-kitin kompleksinden kaynakland\u0131\u011f\u0131 g\u00f6zlemlendi. Protein-kitin kompleksi beklenen \u015fekilde, kimyasal s\u00fcre\u00e7ler ya da bakteriyel kontaminasyon sonucunda k\u0131smen y\u0131k\u0131mlanm\u0131\u015ft\u0131.<\/p>\n

Ara\u015ft\u0131rmac\u0131lar, protein-kitin kompleksinin kal\u0131nt\u0131s\u0131n\u0131n, bir alt tabaka sa\u011flayarak, organik fosil korunmas\u0131nda kritik bir rol oynayabilece\u011fini ileri s\u00fcr\u00fcyorlar.<\/p>\n

 <\/p>\n

Kaynak<\/strong>: http:\/\/www.sciencedaily.com\/releases\/2011\/02\/110207115046.htm<\/a><\/p>\n

G. D. Cody, N. S. Gupta, D. E. G. Briggs, A. L. D. Kilcoyne, R. E. Summons, F. Kenig, R. E. Plotnick, A. C. Scott. Molecular signature of chitin-protein complex in Paleozoic arthropods. Geology<\/em>, 2011; DOI: 10.1130\/G31648.1<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Yeni yap\u0131lan bir \u00e7al\u0131\u015fmada paleozoik d\u00f6neme ait eklembacakl\u0131 fosillerinde protein ve polisakkaritlerden olu\u015fan kitin-protein kompleksine rastland\u0131. Bug\u00fcne kadar kitin-protein kompleksinin g\u00f6r\u00fcld\u00fc\u011f\u00fc en ya\u015fl\u0131 fosiller 25 milyon ya\u015f\u0131ndaki senozoik fosillerdi. 80 milyon ya\u015f\u0131ndaki senozoik fosillerde de yap\u0131sal protein kal\u0131nt\u0131lar\u0131na rastlanm\u0131\u015ft\u0131. Geology dergisinde yay\u0131mlanan ara\u015ft\u0131rma sonu\u00e7lar\u0131n\u0131n organik fosil kay\u0131tlar\u0131na b\u00fcy\u00fck katk\u0131 sa\u011flayaca\u011f\u0131 bildiriliyor. Eklembacakl\u0131lar ortak bir \u00f6zellik […]<\/p>\n","protected":false},"author":716,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[122,19],"tags":[239,354],"class_list":["post-9826","post","type-post","status-publish","format-standard","hentry","category-85-sayi","category-bilim-gundemi","tag-fosiller","tag-paleontoloji-fosilbilim"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t