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FULL The Elem.ent Bbc

 
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MessagePosté le: Jeu 2 Juin - 04:57 (2016)    Sujet du message: FULL The Elem.ent Bbc Répondre en citant




The Element Bbc > bit.ly/1ZeNTMA










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So crucial in fact that a new search is already under way - to find a fresh and reliable source of the elusive metal substance, before current sources dry up."It is an element beloved of chemists," explains chemist Andrea Sella of University College London, "because almost none of us has seen it".The tale of its discovery is something of a shaggy dog story, beginning with the father of the periodic table, the 19th Century Russian polymath Dmitri Mendeleev."He was the man who first came up with this systematic scheme for the elements," explains Sella. But they became an inspiration, because they stood up and fought."Subscribe to the BBC News Magazine's email newsletter to get articles sent to your inbox. 2 June 2016 Abandon 'utopian dreams', says EU head 2 June 2016 Golf tournament move angers Trump 2 June 2016 Features & Analysis No victory march Setbacks for Iraqi push to retake Falluja from IS Somaliland v the Sami The World Cup tournament for the stateless Joyful but jittery Paul Simon on happiness, death and Donald Trump Guns and sticks Inside a Hindu 'self defence' training camp Friend or foe Will Russia and Turkey overcome their differences? New thread Reddit boss hints at new online direction Chocolate dreams The shops championing Ivory Coast's cocoa at home Standing up for hate Why some on the internet loudly oppose a curb on 'hate speech' New 'Avengers' Who are the latest militants hitting Nigeria's oil pipelines? News navigation Sections Home Video World World Home Africa Asia Australia Europe Latin America Middle East US & Canada UK UK Home England N. Listen to the latest from Business Daily Browse the Business Daily podcast archive Read other stories in the series The mineral consisted of lead oxide and lead chromate, and the colour it produced became known to artists as "chrome red".In fact it provided a range of colours. Take a bit of steel, place it in a bath of acid containing dissolved chromium, and then pass an electric current through it, and the chromium will naturally stick to the surface of the metal as it discharges electricity.This was how another great icon was born - the engine of the Harley Davidson motorcycle.What Marlon Brando did for chromium In the 1953 film, The Wild One, Marlon Brando rode a Triumph, rather than a Harley, but it too glistened with stainless steel. "Because these people still died - many have died since the case. And the m refers to a specific configuration of those particles.The result is an atom that decays within a few hours, generating gamma rays - radiation that can be used to produce medical images.

Yet it also harbours a dark secret that featured in one Oscar-winning Hollywood film.In the late 1920s, on either side of the Atlantic, two very different companies had the same idea - to play an architectural prank on the general public.In London it was the Savoy Hotel & Theatre, while in New York it was the giant carmakers, the Chrysler Corporation.The prank was to secretly clad their buildings in a shocking new material - stainless steel.In 1929, the Savoy revealed the gleaming new signage over its entrance, with the hotel's name picked out in green fluorescent lights. "" Added, go to My Tracks More from . The move would lead to disputes with Brown Firth, as well as with two American rivals, but it would eventually make Brearley a rich man.Brearley's achievement was somewhat accidental. Download MP3 View Programme information Hydrogen (H) - acids Wed 19 Aug 2015 These powerful chemicals are essential for industry, but are dangerous to handle. Download MP3 View Programme information Boron (B) Thu 11 Jun 2015 The mineral from the Wild West that toughens glass and stops bullets in their tracks. Image caption Louis Nicolas Vauquelin identified and named chromium But its early uses were far removed from the silvery sheen of Art Deco architecture. Explore the BBC News News Sport Weather Shop Earth Travel Capital iPlayer Culture Autos Future TV Radio CBBC CBeebies Food iWonder Bitesize Travel Music Earth Arts Make It Digital Taster Nature Local Terms of Use About the BBC Privacy Policy Cookies Accessibility Help Parental Guidance Contact the BBC Advertise with us Ad choices Copyright 2016 BBC. Image caption Dr Kennedy Mangera "It is very easy to turn [the accelerator] off, and nothing is radioactive afterwards except the technetium," Martin claims.These accelerators - smaller, safer, and more manageable than reactors - would also address another big problem."Speed is very important when we are handling technetium," explains Dr Kennedy Mangera, director of radiopharmacology at the Winnipeg Health Sciences Centre, and one of Martin's collaborators."It takes about 45 minutes to transport the product to the hospital. "It's parked outside, used to American winters."It was the move to the gorgeous polished surfaces produced by chrome-plating that brought the bikes to life. Image caption Julia Roberts won an Oscar for her portrayal of Erin Brockovich Image caption The real Erin Brockovich "Hexavalent chromium is a really good anti-rust inhibitor," explains Brockovich - the real-life campaigner whose legal battle against the utility Pacific Gas & Electric (PG&E) in the California town of Hinkley formed the basis of the film."They had a very antiquated gas compressor facility, and the engines in there get really hot, and they run water through them, and you don't want that water to corrode, so they add hexavalent chromium."This was back in the 50s and 60s.

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MessagePosté le: Jeu 2 Juin - 04:57 (2016)    Sujet du message: Publicité

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