Winston-Salem Journal: Biodiesel is not likely to replace gasoline as the main source of transportation fuel in most of our lifetimes. But researchers at Wake Forest University are convinced that they have a formula for a catalyst that could lower the cost of producing biodiesel enough so that it could provide 5 percent of the nation’s needs. “If we, as a nation, can do that, that’s enough biodiesel to replace the need for oil from a country such as Iraq,” said Abdessadek Lachgar, a chemistry …