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Christopher H. Sommers, Ph.D., a research microbiologist and Xuetong Fan, Ph.D., a research food technologist, both work for the Food Safety Intervention Technologies Research Unit, USDA-ARS-Eastern Regional Research Center, Wyndmoor, PA. Drs. Sommers and Fan were co-moderators of the IFT symposium from which this book arose and have over twenty-five years combined experience in food irradiation, food technology, chemistry, microbiology and toxicology.