School of Food Science

Dojin Ryu



Barbara Rasco

Carolyn Hovde Bohach
Charlie Edwards
Girish Ganjyal
James Harbertson
Thomas Henick-Kling
Helen Joyner
Jeff Kronenberg
Amy Lin
Scott Minnich
Greg Möller
Andrzej Paszczynski
Carolyn Ross
Dojin Ryu
Brennan Smith
Denise Smith
Gülhan Ünlü
Mei-Jun Zhu





OFFICE: AgSci 116, UI
PHONE: (208) 885-0166
FAX: (208) 885-2567


Research Interests

Research interests in my laboratory involve naturally occurring toxicants of microbial or environmental origin and the effect of various food processes on their chemistry and biological effects. An area of emphasis is chemical and toxicological fate of mycotoxins, a diverse group of secondary metabolites produced by certain fungi. As these toxins frequently contaminates agricultural commodities and often survive common food processes, health impact of long-term exposure to these toxins are being investigated. Current projects include chemical and toxicological fate of ochratoxin A and its risk assessment. We are also interested in integrating research, education, and/or extension to maximize its impact on food safety. Currently, we are developing integrated strategies to promote food safety among Deaf and hard-of-hearing population.


Ph.D. 1997 Food Science and Technology, University of Nebraska-Lincoln
M.S. 1992 Food Science and Human Nutrition, University of Missouri-Columbia
B.S. 1989 Food Science and Technology, Korea University, Seoul, Korea

Work Experience

2017- Current Professor; School of Food Science, University of Idaho
2012 – 2017 Associate Professor; School of Food Science, University of Idaho
2008 – 2012 Associate Professor; Department of Nutrition & Food Sciences, Texas Woman’s University
2004 – Current Adjunct Professor; Department of Food Science & Technology, University of Nebraska-Lincoln
Center for Environmental Health and Toxicology, University of Nebraska Medical Center
2004 – 2008 Assistant Professor; Department of Nutrition & Food Sciences, Texas Woman’s University
2001 – 2004 Research Assistant Professor; Department of Food Science & Technology, University of Nebraska-Lincoln
2000 – 2001 Postdoctoral Research Associate; Department of Food Science & Technology, University of Nebraska-Lincoln
1998 – 1999 Lecturer; Department of Food & Nutrition, College of Allied Health, Korea University, Seoul, Korea
Department of Food Science & Nutrition, Duksung Women’s University, Seoul, Korea
1998 – 2000 Postdoctoral Research Associate; The Institute of Biotechnology, Korea University, Seoul, Korea

Honors and Awards

Scholarship Award 2012 College of Health Sciences, TWU
Distinction in Scholarship 2009 Texas Woman’s University
Post-doctoral Research Fellowship 1998 Korea Science and Engineering Foundation
ETCGP Graduate Fellowship 1995-1997 Environmental Toxicology and Carcinogenecity Graduate Program, Eppley Cancer Institute, University of Nebraska Medical Center, NE

Recent Publications

  1. Lee, H.J., S. Dahal, E.G. Perez, R.J. Kowalski, G. Ganjyal, and D. Ryu. 2017. Reduction of ochratoxin A in oat flakes by twin-screw extrusion processing. Food Prot. In press.
  2. Mitchell, N.J., C. Chen, J. Palumbo, A. Bianchini, J. Stratton, J. Cappozzo, D. Ryu, and F. Wu. 2017. A risk assessment of dietary ochratoxin A in the United States. Food Chem Toxicol 100:265-273.
  3. Cappozzo, J., L.S. Jackson, H.J. Lee, W. Zhou, F. Al-Taher, J. Zweigenbaum, and D. Ryu*. 2017. Occurrence of ochratoxin A in baby foods in United States. Food Prot. 80:251-256.
  4. Lee, H.J. and D. Ryu*. Worldwide occurrence of mycotoxins in cereals and cereal-derived food products: Public health perspectives of their co-occurrence. J. Agric. Food Chem. DOI: 10.1021/acs.jafc.6b04847
  5. Al-Taher, F., J. Cappozzo, Zweigenbaum, H.J. Lee, L.S. Jackson, and D. Ryu. 2017. Detection and quantitation of mycotoxins in infant cereals in the U.S. market by LC-MS/MS using a stable isotope dilution assay. Food Control 72:27-35.
  6. Robinson, A.L., H.J. Lee, and Dojin Ryu. 2017. Polyvinylpolypyrrolidone reduces cross-reactions between antibodies and phenolic compounds in an enzyme-linked immunosorbent assay for the detection of ochratoxin A. Food Chem. 214:47-52.
  7. Dahal, S., H.J. Lee, K. Gu, and D. Ryu. 2016. Heat stability of ochratoxin A in an aqueous buffered model system. Food Prot. 79(10):1748-1752.
  8. Robinson, A.L., H.J. Lee, J. Kwon, E. Todd, F. Rodriguez, and Dojin Ryu. 2016. Adequate hand washing and glove use are necessary to reduce cross-contamination from hands with high bacterial loads. Food Prot. 79(2):304-308.
  9. Lee, H.J. and D. Ryu. 2015. Advances in mycotoxin research: Public health p J. Food Sci. 80(12):T2970-2983.
  10. Kuruc, J.A., J. Hegstad, H.J. Lee, K. Simons, D. Ryu, and C. Wolf-Hall. 2015. Infestation and quantification of ochratoxigenic fungi in barley and wheat naturally contaminated with ochratoxin A. Food Prot. 78(7):1350-1356.
  11. Bianchini, A., R. Horsley, M.M. Jack, B. Kobielush, D. Ryu, S. Tittlemier, W.W. Wilson, H.K. Abbas, S. Abel, G. Harrison, J.D. Miller, W.T. Shier, and G. Weaver. 2015. DON Occurrence in Grains: A North American Perspective. Cereal Foods World 60(1):32-56.
  12. Lee, H.J. and D. Ryu. 2015. Significance of ochratoxin A in breakfast cereals from the United States. Agric. Food Chem. 63(43):9404-9409.
  13. Liu, X., Y. Xu, D.B. Wan, Y.H. Xiong, Z.Y. He, X.X. Wang, S.J. Gee, D. Ryu, and B.D. Hammock. 2015. Development of a nanobody-alkaline phosphatase fusion protein and its application in a highly sensitive direct competitive fluorescence enzyme immunoassay for detection of ochratoxin A in cereal. Chem. 87(2):1387-1394.

See full Curriculum Vitae

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