{"id":15535,"date":"2012-05-17T08:53:34","date_gmt":"2012-05-17T06:53:34","guid":{"rendered":"http:\/\/www.bilgeyatirimci.com\/?p=15535"},"modified":"2012-05-17T08:53:50","modified_gmt":"2012-05-17T06:53:50","slug":"bakir","status":"publish","type":"post","link":"https:\/\/www.bilgeyatirimci.com\/i\/bakir\/","title":{"rendered":"Bak\u0131r"},"content":{"rendered":"<div>Bak\u0131r ilgin\u00e7 bir metaldir. Yumu\u015fakt\u0131r, kolay e\u011filip b\u00fck\u00fcl\u00fcr. Hava ko\u015fullar\u0131ndan etkilenir, kolayca oksitlenebilir. Bu oksitlenme sonucunda yemek kab\u0131 olarak kullan\u0131ld\u0131\u011f\u0131nda zehirlenmeye yol a\u00e7abilir. O nedenle bak\u0131r kaplar belirli aral\u0131klarla kalaylan\u0131r.<\/div>\n<div><\/div>\n<div>Kalay da yumu\u015fak bir metaldir. Buna kar\u015f\u0131l\u0131k oksitlenmeye kar\u015f\u0131 diren\u00e7lidir. Bak\u0131r kaplar\u0131n \u00fczerine kapland\u0131\u011f\u0131 zaman oksitlenmeyi \u00f6nler. \u00c7ocuklu\u011fumuzda kalayc\u0131lar vard\u0131. O d\u00f6nemlerde al\u00fcminyumdan, \u00e7elikten yap\u0131lm\u0131\u015f ya da teflonla kaplanm\u0131\u015f yemek kaplar\u0131, tencereler olmad\u0131\u011f\u0131 i\u00e7in daha \u00e7ok bak\u0131r kaplar kullan\u0131l\u0131r, kalayc\u0131lar bu kaplar\u0131 kalaylarlard\u0131. \u015eimdilerde bak\u0131r kaplar yeniden moda oldu\u011fu i\u00e7in kalayc\u0131lar da yeniden \u00e7\u0131kt\u0131 ortaya.<\/div>\n<div><\/div>\n<div>\u0130kisi de yumu\u015fak birer metal olan bak\u0131rla kalay belirli bir derecede ergitilip belirli bir oranda (genellikle y\u00fczde 85 \u2013 90 bak\u0131r y\u00fczde 10 &#8211; 15 oran\u0131nda kalay) birbirine kar\u0131\u015ft\u0131r\u0131l\u0131rsa bronz (ya da tun\u00e7) denilen sert ve oksitlenmeyen bir metal kar\u0131\u015f\u0131m\u0131 ortaya \u00e7\u0131k\u0131yor.<\/div>\n<div><\/div>\n<div>M.\u00d6. 2000\u2019lere gelinceye kadar kap kacak yap\u0131m\u0131nda kullan\u0131lan bak\u0131r\u0131n yerini o tarihlerde yava\u015f yava\u015f bronz almaya ba\u015flad\u0131. Bu yeni bile\u015fimin yayg\u0131n kullan\u0131m\u0131 yakla\u015f\u0131k M.\u00d6. 1200\u2019lere kadar uzan\u0131yor. O tarihlerde demir kullan\u0131m\u0131 ba\u015fl\u0131yor ve bak\u0131r\u0131n de\u011feri d\u00fc\u015f\u00fcyor.<\/div>\n<div><\/div>\n<div>Bak\u0131r\u0131n en y\u00fcksek de\u011fere ula\u015ft\u0131\u011f\u0131 d\u00f6nemin, tek ba\u015f\u0131na kullan\u0131ld\u0131\u011f\u0131 M.\u00d6 2000\u2019lere kadar olan d\u00f6nem oldu\u011funu d\u00fc\u015f\u00fcn\u00fcyorum. Hitit yasalar\u0131nda yaz\u0131l\u0131 fiyatlardan giderek bir hesaplama yapt\u0131\u011f\u0131mda bak\u0131r\u0131n ton fiyat\u0131n\u0131n M.\u00d6.1250\u2019de yakla\u015f\u0131k 3.000 dolar dolay\u0131nda oldu\u011fu ortaya \u00e7\u0131k\u0131yor. Bu d\u00f6nem bak\u0131r\u0131n kalayla kar\u0131\u015ft\u0131r\u0131l\u0131p bronz yap\u0131ld\u0131\u011f\u0131 d\u00f6nemdir. Bu durumda bak\u0131r\u0131n tek ba\u015f\u0131na kullan\u0131ld\u0131\u011f\u0131 \u00f6nceki d\u00f6nemlerde daha pahal\u0131 olmas\u0131 gerekiyor.<\/div>\n<div><\/div>\n<div>M.S. 1900 y\u0131l\u0131ndan itibaren bak\u0131r\u0131n ton fiyat\u0131n\u0131n dolar cinsinden kar\u015f\u0131l\u0131\u011f\u0131n\u0131 tarihsel serilerden giderek bulabiliyoruz. \u00d6rne\u011fin 1900 y\u0131l\u0131nda bak\u0131r\u0131n tonu 357 dolarm\u0131\u015f.<\/div>\n<div><\/div>\n<div>A\u015fa\u011f\u0131daki tabloda bak\u0131r\u0131n dolar cinsinden ton fiyat\u0131n\u0131 M.\u00d6. 1350 y\u0131l\u0131ndan bug\u00fcne kadar sunuyorum. M.S. 1900 y\u0131l\u0131na kadar olan fiyatlar benim tahminlerimdir. M.\u00d6. 1250 y\u0131l\u0131ndaki fiyat tahminini Hitit yasalar\u0131nda yaz\u0131l\u0131 g\u00fcm\u00fc\u015f cinsinden ifade edilmi\u015f bak\u0131r fiyatlar\u0131na dayanarak yapt\u0131m. M.\u00d6. ile ilgili \u00f6teki tahminler ise bu baz fiyata dayal\u0131 olarak yap\u0131lm\u0131\u015f spek\u00fclatif tahminlerdir.<\/div>\n<div><\/div>\n<div>Yaz\u0131n\u0131n devam\u0131 i\u00e7in <strong><a href=\"http:\/\/www.mahfiegilmez.com\/2012\/05\/bakr.html\" target=\"_blank\" data-wpel-link=\"external\" rel=\"nofollow external noopener\">TIKLAYINIZ.<\/a><\/strong><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Bak\u0131r ilgin\u00e7 bir metaldir. Yumu\u015fakt\u0131r, kolay e\u011filip b\u00fck\u00fcl\u00fcr. Hava ko\u015fullar\u0131ndan etkilenir, kolayca oksitlenebilir. Bu oksitlenme sonucunda yemek kab\u0131 olarak kullan\u0131ld\u0131\u011f\u0131nda zehirlenmeye yol a\u00e7abilir. O nedenle&hellip;<\/p>\n","protected":false},"author":12,"featured_media":13098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tumyazilar"],"_links":{"self":[{"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/posts\/15535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/comments?post=15535"}],"version-history":[{"count":0,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/posts\/15535\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/media\/13098"}],"wp:attachment":[{"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/media?parent=15535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/categories?post=15535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bilgeyatirimci.com\/wp-json\/wp\/v2\/tags?post=15535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}