Monday, December 17, 2012

DNA directly photographed for first time | Essentials

DNA directly photographed for first time

Human genome printed
Human genome printed by JohnJobby
License (according to Flickr): Attribution-ShareAlike License
Excerpt:

Fifty-nine years after James Watson and Francis Crick deduced the double-helix structure of DNA, a scientist has captured the first direct photograph of the twisted ladder that props up life. Enzo Di Fabrizio, a physics professor at Magna Graecia University in Catanzaro, Italy, snapped the picture using an electron microscope. Previously, scientists had only seen DNA's structure indirectly. The double-corkscrew form was first discovered using a technique called X-ray crystallography, in which a material's shape is reconstructed based on how X-rays bounce after they collide with it. Enzo Di Fabrizio A bundle of DNA is supported by two silicon pillars. But Di Fabrizio and his colleagues developed a plan to bring DNA out of hiding. They built a nanoscopic landscape of extremely water-repellant silicon pillars.

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Enzo Di Fabrizio

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James Watson

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Francis Crick

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Alan Boyle

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FieldTerminology: DNA

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