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White LEDs directly on paper

Imagine a white luminous curtain waving in the breeze. Or wallpaper that lights up your room with perfect white light. The applications are not very far away. White LEDs, made from zinc oxide and a conducting polymer, can ...

Jul 10, 2012 4 / 5 (6) 3

UN: Treaty expanded by 9 more dangerous chemicals

(AP) -- A U.N.-sponsored treaty to combat highly dangerous chemicals has been expanded beyond the original "dirty dozen" to include nine more substances that are used in pesticides, flame retardants and other products, U.N. ...

May 09, 2009 3.3 / 5 (7) 5

List of search results for pfos