Vincent H Varel
(Vince)
Environmental Management Research
Microbiologist
Phone: (402) 762-4207
Fax: (402) 762-4209
U.S. MEAT ANIMAL RESEARCH CENTER
STATE SPUR 18D CLAY CENTER, NE, 68933
Varel, V.H., Wells, J., Berry, E.D., Spiehs, M.J., Miller, D.N., Ferrell, C.L., Shackelford, S.D., Koohmaraie, M. 2008. Odorant production and persistence of generic E. coli in manure slurries from cattle fed 0, 20, 40, and 60% wet distillers grains with solubles (WDGS)[abstract]. Journal of Animal Science 86(E-Suppl. 2)/Journal of Dairy Science 91(E-Suppl. 1):325.
Wells, J., Varel, V.H. 2008. Viability of zoonotic pathogens Escherichia coli and Salmonella in swine manure slurries with and without a urease inhibitor and thymol. Letters in Applied Microbiology 46:477-482.
Animut, G., Puchala, R., Goetsch, A.L., Patra, A.K., Sahlu, T., Varel, V.H., Wells, J. 2008. Methane emission by goats consuming diets with different levels of condensed tannins from lespedeza. Animal Feed Science and Technology 144:212-227.
Varel, V.H., Wells, J., Berry, E.D. 2007. Effect of N-(n-butyl) Phosphoric Triamide (NPBT) and a Linalool or Pine Oil Extract on Urea Concentration, Odorants, and Coliform Bacteria in Cattle Feedlot Manure. In CDRom Proceedings: American Society of Agri Engineers Special Meetings, Sept. 15-19, 2007, Broomfield, CO. CDRom 701P0907cd.
Varel, V.H., Wells, J., Miller, D.N. 2007. Combination of a urease inhibitor and a plant essential oil to control coliform bacteria, odour production, and ammonia loss from cattle waste. Journal of Applied Microbiology 102:472-477.
doi:10.1111/j.1365-2672.2006.03120.x
Varel, V.H., Wells, J. 2007. Influence of thymol and a urease inhibitor on coliform bacteria, odor, urea, and methane from a swine production manure pit. Journal of Environmental Quality 36(3):773-779.
Animut, G., Puchala, R., Goetsch, A., Sahlu, T., Detweiler, G., Patra, A., Varel, V., Wells, J. 2006. Methane emission by goats consuming diets with different levels of condensed tannin-containing lespedeza and sorghum-sudangrass [abstract]. Journal of Animal Science 84(Suppl. 1):26.
Varel, V.H., Wells, J. 2006. Influence of thymol on coliform bacteria, VFA, and methane production from pull-plug swine manure pits [abstract]. Journal of Animal Science 84(Suppl. 1):292-293.
Wells, J., Berry, E.D., Varel, V.H. 2006. Effects of essential oils on viability of Escherichia coli O157:H7 in treated beef cattle manure slurries and on prevalence from treated feedlot surfaces [abstract]. Journal of Animal Science 84(Suppl 1):356-357.
Varel, V.H., Miller, D.N., Berry, E.D. 2006. Incorporation of thymol into corncob granules for reduction of odor and pathogens in feedlot cattle waste. Journal of Animal Science. 84(2):481-487.
Wells, J., Varel, V.H. 2005. Viability of Salmonella enterica Typhimurium and Escherichia coli O157:H7 in finishing swine manure slurries with and without a urease inhibitor and a plant essential oil [abstract]. Journal of Animal Science. 83(Supplement 1):301-302.
Varel, V.H., Wells, J. 2005. Plant oils and urease inhibitors as solutions for environmental issues associated with confined animal feeding operations. Proceedings of the 2005 Conference on Gastrointestinal Function. p. 28.
Miller, D.N., Berry, E.D., Varel, V.H. 2004. Microbial activities and feedlot emisions. Procedings of the International Annual Meetings of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, October 31 - November 4, 2004, Seattle, WA, 2004 CDROM.
Varel, V.H., Wells, J., Miller, D.N. 2004. Combination of a urease inhibitor and a plant essential oil for control of fecal coliforms and emissions of odor and ammonia from cattle waste [abstract]. Journal of Animal Science 82(Suppl. 1):302.
Wells, J.E., Berry, E.D., Miller, D.N., Varel, V.H. 2004. Effect of plant phenolics on Escherichia coli O157:H7 survival in bovine feces. In: Proceedings of the 104th General Meeting of the American Society for Microbiology, May 23-27, 2004, New Orleans, Louisiana. 2004 CDROM.
Yen, J. T., Varel, V. H., Nienaber, J. A. 2004. Metabolic and microbial responses in western crossbred and Meishan growing pigs fed a high-fiber diet. Journal of Animal Science. 82:1740-1755.
MILLER, D.N., BERRY, E.D., VAREL, V.H. DIFFERENCES IN FEEDLOT SURFACE MOISTURE AND MANURE CONTENT CONTROL ODOR COMPOUND PRODUCTION, DUST POTENTIAL, GREENHOUSE GAS EMISSION, AND NUTRIENT CONTENT. CD-ROM. Denver, CO.: AMERICAN SOCIETY OF AGRONOMY, CROP SCIENCE SOCIETY OF AMERICA, AND SOIL SOCIETY OF AMERICA ANNUAL MEETING. 2003.
Varel, V.H., Miller, D.N., Lindsay, A.D. 2004. Plant oils thymol and eugenol affect cattle and swine wastes emissions differently. Water Science and Technology 50(4):207-213.
MILLER, D.N., VAREL, V.H. SWINE MANURE COMPOSITION AFFECTS THE BIOCHEMICAL ORIGINS, COMPOSITION, AND ACCUMULATION OF ODOROUS COMPOUNDS. JOURNAL OF ANIMAL SCIENCE. 2003. v. 81. p. 2131-2138.
VAREL, V.H., MILLER, D.N., BERRY, E.D. SLOW-RELEASE THYME OIL GRANULES FOR CONTROL OF ODOR AND PATHOGENS IN FEEDLOT CATTLE WASTE. JOURNAL OF ANIMAL SCIENCE. 2003. v. 81(SUPP.1): ABSTRACT P. 77.