{"id":380,"date":"2019-09-25T19:35:00","date_gmt":"2019-09-25T19:35:00","guid":{"rendered":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/?p=380"},"modified":"2022-08-11T19:54:19","modified_gmt":"2022-08-11T19:54:19","slug":"technecium","status":"publish","type":"post","link":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/2019\/09\/25\/technecium\/","title":{"rendered":"Techn\u00e9cium…"},"content":{"rendered":"\n

Techn\u00e9cium patr\u00ed medzi chemick\u00e9 prvky, ktor\u00fdch existenciu predpovedal D. I. Mendelejev na z\u00e1klade periodick\u00e9ho z\u00e1kona. Napriek tomu unikalo v\u0161etk\u00fdm pokusom o objavenie a\u017e do roku 1937 kedy ho objavil Emilio Segr\u00e9 anal\u00fdzou deflektora cyklotr\u00f3nu. Je to preto, lebo techn\u00e9cium nem\u00e1 ani jeden stabiln\u00fd izotop, a v zemskej k\u00f4re sa nach\u00e1dza len v minim\u00e1lnych mno\u017estv\u00e1ch. V\u0161etky izotopy s\u00fa r\u00e1dioakt\u00edvne a \u017eij\u00fa maxim\u00e1lne mili\u00f3ny rokov. Napriek tomu na\u0161lo rozsiahle uplatnenie v nukle\u00e1rnej medic\u00edne a pom\u00e1ha n\u00e1m aj zodpoveda\u0165 ot\u00e1zky p\u00f4vodu chemick\u00fdch prvkov vo vesm\u00edre. V predn\u00e1\u0161ke sa pozrieme na ne\u00faspe\u0161n\u00e9 pokusy o jeho objav v 19. storo\u010d\u00ed, na samotn\u00fd postup identifik\u00e1cie v 20. storo\u010d\u00ed, na jeho praktick\u00e9 pou\u017eitie v medic\u00edne, na to \u010do n\u00e1m hovoria techn\u00e9ciov\u00e9 hviezdy. Apropos, ako to, \u017ee sa v zemskej k\u00f4re nach\u00e1dza techn\u00e9cium ke\u010f vek Zeme je pribli\u017ene 4,5 mili\u00e1rd rokov? Pre\u010do sa d\u00e1vno nerozpadlo? Aj t\u00fato ot\u00e1zku sa pok\u00fasime zodpoveda\u0165.<\/p>\n\n\n\n

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Techn\u00e9cium patr\u00ed medzi chemick\u00e9 prvky, ktor\u00fdch existenciu predpovedal D. I. Mendelejev na z\u00e1klade periodick\u00e9ho z\u00e1kona. Napriek tomu unikalo v\u0161etk\u00fdm pokusom o objavenie a\u017e do roku 1937 kedy ho objavil Emilio Segr\u00e9 anal\u00fdzou deflektora cyklotr\u00f3nu. Je to preto, lebo techn\u00e9cium nem\u00e1 ani jeden stabiln\u00fd izotop, a v zemskej k\u00f4re sa nach\u00e1dza len v minim\u00e1lnych mno\u017estv\u00e1ch. V\u0161etky […]<\/p>\n","protected":false},"author":1,"featured_media":448,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/posts\/380"}],"collection":[{"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/comments?post=380"}],"version-history":[{"count":3,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/posts\/380\/revisions"}],"predecessor-version":[{"id":449,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/posts\/380\/revisions\/449"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/media\/448"}],"wp:attachment":[{"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/media?parent=380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/categories?post=380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.neurobiology.sk\/vedeckakaviaren\/wp-json\/wp\/v2\/tags?post=380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}