George D. Sadler
The National Center for Food Safety and Technology
Illinois Institute of Technology
Ph.D. Purdue University. 1984. Food Chemistry
M.S. Brigham Young University, Food Science
B.S Florida State University, Biology, Chemistry
10/95 Professor Food Packaging, Illinois Institute of Technology (IIT) National Center for Food Safety and Technology (NCFST), Summit-Argo, IL
03/92 Associate Professor of Food Packaging, IIT/NCFST
02/91 Associate Professor of Food Chemistry, University of Florida Department of Food Science and Human Nutrition
06/86 Assistant Professor of Food Chemistry, University of Florida Department of Food Science and Human Nutrition
06/84 Post Doctoral Research Associate, Purdue University Department of Food Science
Polymer Irradiation: Leading collaborative effort with FDA and food-interest companies to evaluate safety issues posed by irradiation of food-packages with gamma, e-beam and x-ray sources.
Plastics and Paper Recycling: Lead commercial collaboration to validate the safety of various recycled polymers for food-contact use.
Mathematical Modeling of Mass Transfer in Polymers: Compiling database of diffusion, permeation and solubility values for various polymer/penetrants combinations of importance in food quality. The research has developing a suite of mathematical models to predict the migration behavior of organics, oxygen and moisture in food packaging polymers.
Seal Integrity: Work catalogs seal defects in polymer packages and determines which are consequential for microbial infiltration and stress failure.
High Pressure Processing- Research examines the impact of high pressure processing on the physical, thermal, microbiological and chemical properties of foods and the functional and transport properties of polymers. Developed methods to determine/facilitate temperature and pH measurement during high-pressure treatment of foods.
Fall, FST 541 Principals of Food Packaging (3)
Professional Member, Institute of Food Technologists
Member, American Chemical Society (ACS)
Past President, ACS, Lakeland, FL Subsection
Selected Professional Activities
Head the academic packaging program at the National Center for Food Safety and Technology. (1992-present)
Developed and currently operate the only academic pilot recycling line in the US. Undertake studies to validate the safety of post-consumer recycled resin for re- manufacture into second-generation containers. Efforts have resulted in FDA approval for several secondary recycled PET processes and generated improved cleaning approaches for polymer recycling. (1994-present)
Head the Polymer Irradiation Safety Consortium, a body of academic, industrial and government participants charged with expanding the number of FDA approved polymers, adhesives and additives allowable in packages used for foods stabilized by irradiation. Co-developed and presented at first national conference on irradiation of food-contact polymers. (1998-present)
Selected by NASA to serve as food-protocol reviewer for the manned space mission to mars. (1998-Present)
Prepared and submitted petition to FDA on the equivalency of e-beam, x-ray and gamma-radiation. Granted 2001.
Analyzed impact of ionizing radiation on various packaging polymers considered essential for FDA approval and provided information to FDA and Polymer Irradiation Task Force members. (2000-Present)
Delivered over 30 invited papers/symposia/media interviews on food and polymer irradiations issue (2000-Present).
Wrote the first published chapter on the impact of high pressure processing on organic packaging materials. The chapter examined the impact of high pressure on molecular and macroscopic behavior of polymers, with examples and extrapolations for biological macromolecules. 2002.
Directed the first national symposium on acrylamide pathways in food. Analyzed acrylamide content in home prepared foods. 2003-present.
Involved in US counterterrorism taskforce. Develop tamper-evident packaging and tamper evident strategies for bulk shipment of foods. 2003-present
Conducted research on High Pressure Processing affects on foods and food packaging. 2003-present.
Selected Peer Reviewed Publications:
Sadler, G. 2004. Fate of energy absorbed by polymers during irradiation treatment. In. Irradiation of Food and Packaging: Recent Developments. ACS Symposium Series 875, p. 203.
Song, Y; Al-Taher, F. and Sadler, G. 2004. The migration of volatile degradation products into ozonated water from plastic packaging materials. J. Food Add. and Cont. 20(10): p. 985-994.
Sadler, G.; P. Murphy and D. Kleyn. 2003. Acidity and pH, Chapter 7. In. Chemical Analysis of Food, 2nd Edition. Ed. S. Nielson. Chapman and Hall, New York.
Kothapalli, A and Sadler, G. 2003. Determination of non-radiolytic compounds in ethylene co-vinyl alcohol. Nucl. Instr. and Meth. in Phys. Res. B 208:340-344.
Schauwecker, A.; Balasuramaniua, V; Sadler, G. , Pascall, M and Adhikari, C. 2002. Influence of high-pressure processing on selected polymeric materials and on the migration of a pressure-transmitting fluid. Pack. Technol and Sci. 15:5 p 255-262.
Sadler, G. Chappas, W. Pierce, D.E. 2001. Evaluation of e-beam, gamma and x-ray treatment on the chemistry and safety of polymers used with pre-packaged irradiated foods: A review. J. Food Add. and Contam. 18(6):475-501.
Sadler, G. Hussaini, S. and Pierce, D. 2000. Stability of R-PET for food-contact containers: Pilot recycling studies with and mathematical confirmation. ACS symposium series 753. In. Food Packaging:Testing Methods and Applications. Ed. S Risch. ACS Press, Washington, DC.