Gustavo A. Fuentes, professor of chemical engineering at Universidad A. Metropolitana-Iztapalapa in Mexico City, was awarded a 3-month UC MEXUS-CONACYT Visiting Scholar Fellowship in 2009, hosted by Professor Enrique Iglesia in the Department of Chemical Engineering at UC Berkeley. Fuentes conducted research on the use of gold nanoparticles as catalysts for the production of different chemicals related, but not limited, to the ongoing attempt to increase the use of renewable resources as feedstock in the chemical industry. This research stems from the need to tailor the activity and selectivity of heterogeneous catalysts during the reactions of highly functionalized molecules derived from bio-based materials such as cellulosics. Fuentes' current research also involves the study of deNOx catalysis and the development of novel characterization techniques for in-situ studies of working catalysts, in particular in the UV-Vis-NIR range. He is also examining solid-state rearrangements that occur during practical application of heterogeneous catalysts, commonly referred to as sintering or coarsening.