Professor Martin Tangey, Director of Edinburgh Napier University Biofuel Research Centre, looks at a glass of whisky and a jar of butanol during a media viewing in Edinburgh, Scotland August 17, 2010. The University which has has filed a patent for a new super butanol biofuel made from whiskey by-products, 'pot ale' - a liquid taken from the copper stills, and 'draff' which is the spent grain, claims the bio-fuel gives 30% more output power than ethanol. REUTERS/David Moir (BRITAIN - Tags: ENERGY SCI TECH BUSINESS ENVIRONMENT)