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Iowa State University

Iowa State University
Picture of StephanieHansen
Stephanie Hansen
Assistant Professor
Iowa State University
313F Kildee
Ames, IA 50011
Phone: 515-294-7326
Fax:     515-294-3795
Email: slhansen@iastate.edu

Education
North Carolina State University Ph.D. (Nutrition), 2008
North Carolina State University M.S. (Animal Science), 2005
Iowa State University B.S. (Animal Science), 2003


Research
Dr. Hansen’s area of research interest is ruminant nutrition with an emphasis on mineral metabolism. Molecular mechanisms responsible for absorption and transport of minerals in cattle, as well as the interactions between trace elements, are key areas of her work. Dr. Hansen’s research also addresses nutritional challenges that Midwestern cattle producers face. Current projects are focused on elucidating metabolic explanations for the toxicity of sulfur, as well as the effects of sulfur on trace mineral metabolism and production efficiency of cattle.

Professional Affiliations
American Society of Animal Science
North American Colleges and Teachers of Agriculture
American Society of Dairy Science

Selected Publications
Hansen, S. L., N. Trakooljul, H-C. Liu, A. J. Moeser, and J. W. Spears. 2009. Iron transporters are differentially regulated by dietary iron, and modifications are associated with changes in manganese metabolism in young pigs. J. Nutr.139:1474 - 1479.

Hepburn, J. J., J. D. Arthington, S. L. Hansen, J. W. Spears, and M. D. Knutson. 2009. Copper chaperone for Cu, Zn superoxide dismutase: A potential biomarker for copper status in cattle. J. Anim. Sci. Accepted.

Hansen, S. L. and J.W. Spears. 2009. Bioaccessibility of iron from soil is increased by silage fermentation. J. Dairy Sci. 92: 2896-2905.

Hansen, S. L., M.S. Ashwell, L.R. Legleiter, R.S. Fry, K.E. Lloyd, and J.W. Spears. 2009. The addition of high manganese to a copper-deficient diet further depresses copper status and growth of cattle. Br. J. Nutr. 101:1068-1078.

Hansen, S. L., P. Schlegel, L. R. Legleiter, K. E. Lloyd, and J. W. Spears. 2007 Bioavailability of copper from copper glycinate in steers fed high dietary sulfur and molybdenum. J. Anim. Sci. 86:173-179.

Hansen, S. L., J. W. Spears, K. E. Lloyd, and C. S. Whisnant. 2006. Growth, reproductive performance, and manganese status of heifers fed varying concentrations of manganese. J. Anim. Sci. 84:3375-3380.

Hansen, S. L., J. W. Spears, K. E. Lloyd, and C. S. Whisnant. 2006. Feeding a low manganese diets to heifers during gestation impairs fetal growth and development. J. Dairy Sci. 89:4305-4311.

Legleiter, L. R., H. C. Liu, K. E. Lloyd, S. L. Hansen, R. S. Fry, and J. W. Spears. 2007. Exposure to low dietary copper or low copper coupled with high dietary manganese for one year does not alter brain prion protein characteristics in the mature bovine. J. Anim. Sci. 85: 2895-2903.

H. S. Stahlhut, C. S. Whisnant, K. E. Lloyd, E. J. Baird, L. R. Legleiter, S. L. Hansen, J. W. Spears. 2006. Effect of chromium supplementation and copper status on glucose and lipid metabolism in Angus and Simmental beef cows. Anim. Feed Sci. Technol. 128: 253-265.