The Linda and Bipin Doshi Department of Chemical and Biochemical Engineering welcomes Dr. Joshua Yuan, Lucy and Stanley Lopata Professor and chair of energy, environmental and chemical engineering at Washington University in St. Louis. Yuan's presentation, titled "Next-generation Biorefining, Biomaterials, and Biomanufacturing for Sustainability," will be 4-5 p.m. Monday, Sept. 11, in Room 112 in Bertelsmeyer Hall.