United Press International: U.S. biochemists say they have developed a two-step chemical process that can convert cellulose in raw biomass into promising biofuels. University of Wisconsin researchers said the new process is unprecedented in its use of untreated, inedible biomass as the starting material. They said the key to the new process is the first step, in which cellulose is converted into the “platform” chemical 5-hydroxymethylfurfural from which a variety of valuable commodity chemicals can be …