Dr. Philip N. Smith

Associate Professor, Terrestrial Ecotoxicology


Ph.D. Environmental Toxicology, Texas Tech University 2000

B.S. Chemistry & Biology, Murray State University 1988


Research Interests:


Wildlife Toxicology

Ecological Risk Assessment



ENTX 6371 Ecological Risk Assessment



Dr. Smith is an environmental toxicologist with broad ranging interests in contaminant exposure and responses among ecological receptors. His research is focused on pathways of contaminant exposure among mammals, birds, aquatic organisms, and trophic transfer of environmental contaminants. Additionally, physiological and population-level responses to contaminant exposure are of particular interest to Dr. Smith. Dr. Smith’s research is strategically aligned with his academic emphasis which is risk assessment. Dr. Smith serves as Chair of the TTU Institutional Animal Care and Use Committee. He serves as Associate Editor for Environmental Toxicology & Chemistry, Environmental Health Section Editor of Earth Systems and Environmental Sciences, and on the editorial board for Environmental Pollution.



Recent Publications:

Blackwell, Brett R., Wooten, Kimberly J., Buser, Michael D., Johnson, Bradley J., Cobb, George P., Smith, Philip N. 2015.  Occurrence and characterization of steroid growth promoters associated with particulate matter originating from beef cattle feedyards.  Environmental Science and Technology. (in press).


McEachran, Andrew D., Blackwell, Brett R., Hanson, J. Delton, Wooten, Kimberly J., Mayer, Gregory D., Cox, Stephen B., Smith, Philip N.  2015.  Antibiotics, bacteria, and antibiotic resistance genes: Aerial transport from cattle feed yards via particulate matter.  Environmental Health Perspectives.  123(4)337-343.  http://ehp.niehs.nih.gov/1408555/


Blackwell, Brett R., Brown, Tyson R., Broadway, Paul, Buser, Michael D., Brooks, J, Johnson, Bradley J., Cobb, George P., Smith, Philip N.  2014.  Characterization of trenbolone acetate and estradiol metabolite excretion profiles in implanted steers.  Environmental Toxicology and Chemistry.  33(12)2850-2858.


Wooten, Kimberly J., Blackwell, Brett R., McEachran, Andrew D., Gregory D. Mayer, Smith, Philip N.  2015.  Airborne particulate matter collected near beef cattle feedyards induces androgenic and estrogenic activity in vitro.  Agriculture Ecosystems and Environment.  203:29-35.


McEachran, Andrew D., Wooten, Kimberly J., Blackwell, Brett R., Smith, Philip N.   A preliminary evaluation of veterinary antibiotics, estrogens, in vitro estrogenic activity, and microbial communities in airborne particulate matter emanating from dairy production facilities.  Journal of Environmental Science and Health, Part B:  Pesticides, Food Contaminants, and Agricultural Wastes.  (in review).


Parr, Sandra L., Brown, Tyson R., Ribeiro, Flavio R. B., Chung, K. Y., Hutcheson, John P., Blackwell, Brett R., Smith, Philip N., Johnson, Bradley J.  2014.  Biological responses of beef steers to steroidal implants and zilpaterol hydrochloride.  Journal of Animal Science.  92:3348-3363.


Blackwell, Brett R., Johnson, Bradley J., Buser, Michael D., Cobb, George P., Smith, Philip N.  2015.  Degradation kinetics of trenbolone acetate metabolites and estrogens in urine and feces of implanted steers.  Chemosphere.  (in press).


Faust, Derek R., Hooper, Michael J., Cobb, George P., Barnes, Melanie, Shaver, Donna, Ertolacci, Shauna, Smith, Philip N.  2014.  Metals in green sea turtles: Tissue correlations and relationships.  Environmental Toxicology and Chemistry.  33(9):2020-2027.


Smith, Philip N.  2013.  Environmental Health.  Earth Systems and Environmental Sciences.  Elsevier.  Online reference module.


Weir, Scott, Wooten, Kimberly J., Smith, Philip N., Salice, Christopher J.  2013.  Phthalate ester leachates in aquatic mesocosms: Implications for ecotoxicity studies of endocrine disrupting compounds. Chemosphere.  2014 May, 103:44-50.


Wooten, Kimberly, Smith, Philip N.  2013.  Canine toys and training devices as sources of exposure to phthalates and bisphenol A: quantitation of chemicals in leachate and in vitro screening for endocrine activity.  Chemosphere 93(10): 2245-2253.


Wooten, Kimberly J., Smith, Philip N.  2013. Simulated canine exposure to phthalates and bisphenol A and potential for estrogenic and androgenic responses.  Chemosphere. 93(10): 2245-2253.


Finch, Bryson E., Blackwell, Brett R., Faust, Derek R., Wooten. Kimberly J., Cox, Stephen B., Maul, Jonathan D., Smith, Philip N.  2013.  Effects of 17α-trenbolone and melengestrol acetate on Xenopus laevis growth, development, and survival.  Environmental Science and Pollution Research.  20(2)1151-1160.



The Department of Environmental Toxicology (ENTX) is the academic home for the core faculty of The Institute of Environmental and Human Health (TIEHH) and the Institute for Forensic Science (IFS) at Texas Tech University. TIEHH and IFS provide faculty and graduate students opportunities for multidisciplinary research and scholarly engagement related to environmental, forensic and human health sciences.


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