{"id":7353,"date":"2026-02-04T08:01:38","date_gmt":"2026-02-04T06:01:38","guid":{"rendered":"https:\/\/www.schooler.org.ua\/uk-uavpliv-svintsju-zmenshuyetsja-protjagom-stolittja-analiz-volossja\/"},"modified":"2026-02-04T08:01:38","modified_gmt":"2026-02-04T06:01:38","slug":"uk-uavpliv-svintsju-zmenshuyetsja-protjagom-stolittja-analiz-volossja","status":"publish","type":"post","link":"https:\/\/www.schooler.org.ua\/cs\/uk-uavpliv-svintsju-zmenshuyetsja-protjagom-stolittja-analiz-volossja\/","title":{"rendered":"Expozice olova se v pr\u016fb\u011bhu stolet\u00ed sni\u017euje: Anal\u00fdza vlas\u016f ukazuje dramatick\u00fd pokles"},"content":{"rendered":"

Po v\u00edce ne\u017e stolet\u00ed lidsk\u00e9 vlasy v tichosti zaznamen\u00e1vaj\u00ed dramatick\u00fd pokles vystaven\u00ed olovu, toxick\u00e9mu kovu spojen\u00e9mu s v\u00e1\u017en\u00fdmi zdravotn\u00edmi probl\u00e9my. Nov\u00e1 studie publikovan\u00e1 v \u010dasopise Proceedings of the National Academy of Sciences USA<\/em> analyzovala vzorky vlas\u016f z roku 1916 a zjistila, \u017ee hladiny olova klesly od 60. let v\u00edce ne\u017e 100kr\u00e1t. To nen\u00ed jen o p\u00e9\u010di o vlasy \u2013 je to p\u0159\u00edb\u011bh o \u00fa\u010dinnosti environment\u00e1ln\u00ed politiky a k\u0159ehkosti pokroku. <\/p>\n

Neo\u010dek\u00e1van\u00fd archiv: Vlasy jako historick\u00e1 kronika<\/h3>\n

V\u011bdci veden\u00ed Kenem Smithem z University of Utah zjistili, \u017ee vlasy slou\u017e\u00ed jako pozoruhodn\u011b p\u0159esn\u00fd historick\u00fd z\u00e1znam. Prameny shrom\u00e1\u017ed\u011bn\u00e9 a skladovan\u00e9 po desetilet\u00ed obsahuj\u00ed stopy chemik\u00e1li\u00ed absorbovan\u00fdch z prost\u0159ed\u00ed, v\u010detn\u011b olova. Tento v\u00fdzkum nen\u00ed o marnivosti \u2013 jde o pou\u017eit\u00ed p\u0159ehl\u00ed\u017een\u00e9ho biologick\u00e9ho materi\u00e1lu ke sledov\u00e1n\u00ed zm\u011bn v \u017eivotn\u00edm prost\u0159ed\u00ed. <\/p>\n

Studie se zam\u011b\u0159ila na vzorky z oblasti Salt Lake City a analyzovala hladiny olova jak ve vlasov\u00e9m stvolu, tak ve vn\u011bj\u0161\u00ed vrstv\u011b (kutikule). Rozd\u00edl je rozd\u00edl: olovo v kutikule indikuje zne\u010di\u0161t\u011bn\u00ed vzduchu, zat\u00edmco olovo uvnit\u0159<\/em> vlasu indikuje expozici potravou nebo vodou. Trend je jasn\u00fd: Expozice olova dos\u00e1hla vrcholu v 60. letech 20. stolet\u00ed s \u00farovn\u011bmi 120kr\u00e1t vy\u0161\u0161\u00edmi ne\u017e ve vzorc\u00edch odebran\u00fdch v letech 2020\u20132024. <\/p>\n

Bod zvratu: Environment\u00e1ln\u00ed p\u0159edpisy<\/h3>\n

Dramatick\u00fd pokles expozice olovu se shoduje s vytvo\u0159en\u00edm Agentury pro ochranu \u017eivotn\u00edho prost\u0159ed\u00ed (EPA) v roce 1970 a schv\u00e1len\u00edm p\u0159elomov\u00e9 legislativy v oblasti \u017eivotn\u00edho prost\u0159ed\u00ed, jako jsou z\u00e1kony o \u010dist\u00e9m ovzdu\u0161\u00ed a \u010dist\u00e9 vod\u011b. Nebyla to n\u00e1hoda. Studie tak\u00e9 uv\u00e1d\u00ed uzav\u0159en\u00ed dvou tavic\u00edch pec\u00ed na olovo v Salt Lake City b\u011bhem tohoto obdob\u00ed jako dal\u0161\u00ed faktor zlep\u0161en\u00ed. <\/p>\n

\n

\u201eMysl\u00edm, \u017ee je to p\u0159esv\u011bd\u010div\u00fd d\u016fkaz \u00fa\u010dinnosti ochrany \u017eivotn\u00edho prost\u0159ed\u00ed,\u201c \u0159\u00edk\u00e1 Ken Smith. <\/p>\n<\/blockquote>\n

Studie ukazuje, \u017ee i mal\u00e9 studie mohou odhalit jasn\u00e9 trendy, co\u017e zpochyb\u0148uje my\u0161lenku, \u017ee v\u00fdznamn\u00e9 jsou pouze velk\u00e9 soubory dat. V\u00fdzkumn\u00edci byli schopni sledovat expozici olova d\u00e1le v \u010dase, ne\u017e bylo d\u0159\u00edve mo\u017en\u00e9 pomoc\u00ed tradi\u010dn\u00ed anal\u00fdzy krevn\u00edch vzork\u016f, kter\u00e1 se roz\u0161\u00ed\u0159ila a\u017e na konci 20. stolet\u00ed. <\/p>\n

Pro\u010d na tom z\u00e1le\u017e\u00ed: zdravotn\u00ed a politick\u00e9 d\u016fsledky<\/h3>\n

Sn\u00ed\u017een\u00ed expozice olovu je velk\u00fdm \u00fasp\u011bchem v oblasti ve\u0159ejn\u00e9ho zdrav\u00ed. Olovo je siln\u00fd toxin s celo\u017eivotn\u00edmi n\u00e1sledky: kognitivn\u00ed poruchy a poruchy u\u010den\u00ed u d\u011bt\u00ed a ledvinov\u00e9 a kardiovaskul\u00e1rn\u00ed probl\u00e9my u dosp\u011bl\u00fdch. Dokonce i dnes jsou n\u011bkte\u0159\u00ed Ameri\u010dan\u00e9 odhaleni, co\u017e zd\u016fraz\u0148uje pot\u0159ebu nep\u0159etr\u017eit\u00e9 ostra\u017eitosti. <\/p>\n

Studie slou\u017e\u00ed jako jasn\u00e1 p\u0159ipom\u00ednka toho, \u017ee p\u0159\u00ednosy pro \u017eivotn\u00ed prost\u0159ed\u00ed nejsou trval\u00e9. Jak\u00e9koli zru\u0161en\u00ed politik kontroly zne\u010di\u0161t\u011bn\u00ed by mohlo zvr\u00e1tit desetilet\u00ed pokroku. Jak varuje environment\u00e1ln\u00ed epidemiolo\u017eka Katarzyna Kordas: “Nem\u016f\u017eeme polevit ve sv\u00e9 ostra\u017eitosti a \u0159\u00edci, \u017ee tento probl\u00e9m je vy\u0159e\u0161en.” <\/p>\n

Kl\u00ed\u010dov\u00e9 informace?<\/strong> Efektivn\u00ed ekologick\u00e9 p\u0159edpisy funguj\u00ed<\/em> a jejich dodr\u017eov\u00e1n\u00ed je pro ochranu ve\u0159ejn\u00e9ho zdrav\u00ed z\u00e1sadn\u00ed. Minulost je uchov\u00e1na v na\u0161ich vlasech \u2013 tich\u00e9 sv\u011bdectv\u00ed pokroku i v\u011b\u010dn\u00e9 hrozby rollbacku.<\/p>\n","protected":false},"excerpt":{"rendered":"

Po v\u00edce ne\u017e stolet\u00ed lidsk\u00e9 vlasy v tichosti zaznamen\u00e1vaj\u00ed dramatick\u00fd pokles vystaven\u00ed olovu, toxick\u00e9mu kovu spojen\u00e9mu s v\u00e1\u017en\u00fdmi zdravotn\u00edmi probl\u00e9my. Nov\u00e1 studie publikovan\u00e1 v \u010dasopise Proceedings of the National Academy of Sciences USA analyzovala vzorky vlas\u016f z roku 1916 a zjistila, \u017ee hladiny olova klesly od 60. let v\u00edce ne\u017e 100kr\u00e1t. To nen\u00ed jen o […]<\/p>\n","protected":false},"author":1,"featured_media":7352,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":""},"categories":[1],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts\/7353"}],"collection":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/comments?post=7353"}],"version-history":[{"count":0,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/posts\/7353\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/media\/7352"}],"wp:attachment":[{"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/media?parent=7353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/categories?post=7353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/cs\/wp-json\/wp\/v2\/tags?post=7353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}