Department of Animal Science

Emeritus Faculty

	Dean R. Zimmerman Emeritus Professor of Animal Science Iowa State University
Education Doctor of Philosophy, Iowa State State University: 1960 Bachelor of Science, Iowa State University: 1954
Research Dr. Zimmerman's area of research was in protein and critical amino acid requirements for growth and lean tissue production in pigs; techniques to estimate the genetic potential for rate of protein accretion in young growing pigs; evaluation of feed ingredients; and minimizing nutrient excretion by pigs.
Professional Affiliations American Institution of Nutrition, editorial board; American Society of Animal Science; Sigma Xi.
Selected Publications Coma, J., D.R. Zimmerman and D. Carrion. 1996. Lysine requirement of the lactating sow determined by using plasma urea nitrogen as a rapid response criterion. J. Anim. Sci. 74:1056-1062. Gatnau, R., D.R. Zimmerman, S.L. Nissen, M. Wannemuehler, and R.C. Ewan. 1995. Effects of excess dietary leucine and leucine catabolites on growth and immune responses in weanling pigs. J. Anim. Sci. 73:159-165. Coma, J., D. Carrion, and D.R. Zimmerman. 1995. Use of plasma urea nitrogen as a rapid response criterion to determine lysine requirement of pigs. J. Anim. Sci. 73:472-481. Cai, Y.J., and D.R. Zimmerman. 1995. Relationship of plasma urea nitrogen and urea-cycle amino acid concentrations in swine to dietary electrolyte balance and water intake. Nutrition Research. 15:1517-1524. Arentson, R., and D.R. Zimmerman. 1995. True digestibility of amino acids and protein in pigs with 13 C as a label to determine endogenous amino acid excretion. J. Anim. Sci. 73:1077-1085.