Research interests:

To examine aspects of nutrition and immune function in dairy cows. Current research involves examining the ability of clock genes to modify periparturient immune function.

Education:

• Ph.D. Dairy Science, University of Wisconsin, 2005
• M.S. Animal Science, University of Maryland, 1999
• B.S. Animal Science, University of Maryland, 1997

Publications:

• Rastani, R. R., N. Silva Del Rio, T. F. Gressley, G. E. Dahl, and R. R. Grummer. 2007.  Effects of increasing milking frequency during the last 28 days of gestation on milk production, dry matter intake, and energy balance in dairy cows. J. Dairy Sci. 90: 1729-1739.
  
  
• Gressley, T. F., and L. E. Armentano. 2007. Effects of low rumen degradable protein or abomasal fructan infusion on diet digestibility and urinary nitrogen excretion in lactating dairy cows. J. Dairy Sci. 90:1340-1353.
  
  
• Gressley, T. F., S. M. Reynal, J. J. Olmos Colmenero, G. A. Broderick, and L. E. Armentano. 2006. Development of a tool to insert abomasal infusion lines into dairy cows. J. Dairy Sci. 89:3965-3967.
  
  
• Gressley, T. F., and L. E. Armentano. 2005. Effect of abomasal pectin infusion on digestion and nitrogen balance in lactating dairy cows. J. Dairy Sci. 88:4028-4044.

Abstracts:

• Gressley, T. F., K. K. Fried, J. M. Velasco, E. D. Reid, T. C. Hausman, K. M. Moyes, J. L. Salak-Johnson, and G. E. Dahl. 2007. Effects of reduced freestall access during the dry period upon cellular immune function of dairy cows. J. Dairy Sci. Abstract #21444.
  
  
• Gressley, T. F., E. E. Connor, and G. E. Dahl. 2006. Liver expression of the clock gene TIMELESS is reduced by long day photoperiod in dairy steers. J. Dairy Sci. 89(Suppl. 1):289.
  
  
• Kulick, A. E., T. F. Gressley, J. A. A. Pires, and R. R. Grummer. 2006. Effects of abomasal lipid infusion on liver triglyceride accumulation during fatty liver induction. J. Dairy Sci. 89(Suppl. 1):266.
  
  
• Velasco, J. M., E. D. Reid, K. E. Karvetski, T. F. Gressley, R.L. Wallace, and G.E. Dahl. 2006. Short day photoperiod increases milk yield in cows with a reduced dry period length. J. Dairy Sci. 89(Suppl. 1):147.

Current Teaching Responsibilities

• ANSC 865 - Seminar

Research Groups

The Ruminant Biology Laboratory