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[QUOTE]Originally posted by Firewall: [QB] A common weed, Mimosa pudica or the 'sensitive plant', was an inspiration for Justus Nwaoga. A chemist at the University of Nigeria in Nsukka, he noticed the plant's leaves opened at sunrise and folded at sunset. He started searching for the compound responsible for this and found 'black silicon'. He has built a prototype system using extracts from the weed to light 0.9V solar panels. "It's a natural phenomenon," says Nwaoga, who explains that the weed is widely available and cheap. He was one of 10 finalists in the 2012 Innovation Prize for Africa. His patent has been approved in Nigeria, and he has interest in his invention from China and the UK. [IMG]http://1.bp.blogspot.com/-wrzYLYwQzL8/UiOa5CEQBxI/AAAAAAAAO2E/SAHGXsa80cU/s1600/Screen+Shot+2013-09-01+at+3.51.24+PM.png[/IMG] [/QB][/QUOTE]
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