Joseph Irudayaraj, PhD, is an associate professor of Agricultural and Biological Engineering at Purdue University, West Lafayette, IN. With over 15 years of research and teaching experience in biological and food engineering, Dr. Irudayaraj has been a faculty member at the University of Saskatchewan, Utah State University, and Penn State. His current role at Purdue is to develop micro and nanosensors for food, health, and environmental applications. Christoph Reh, PhD, is a research scientist at Nestlé Research Center, Lausanne, Switzerland working on scientific projects for innovative beverage concepts. Prior to his appointment he was involved for more than 10 years in process analytics including non-destructive testing for factory application and physico-chemical characterization of foods.