IRVINE, Calif., Oct. 18 -- The University of California at Irvine (UCI) announced today that scientists at its school of engineering have synthesized the world's longest electrically conducting nanotubes. These 0.4 cm nanotubes are 10 times longer than previously created electrically conducting nanotubes. The university said the discovery may lead to the development of extremely strong, lightweight materials and ultradense nano-memory arrays for extremely powerful computers, ultralow-loss power transmission lines and nano-biosensors for use in health care applications. 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