Gradient

Senior Scientists

Travis J. Cook, Ph.D.
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Education

Ph.D., Environmental Toxicology, University of Washington

M.S., Industrial Hygiene, University of Washington

B.S., Biochemistry & Molecular Biology, University of Minnesota Duluth

B.A., Chemistry, University of Minnesota Duluth

Expertise

  • Metals
  • Risk Assessment
  • Toxicology
  • Neurotoxicology
  • Industrial Hygiene

    Travis J. Cook, Ph.D.

    Toxicologist

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    Dr. Cook is a toxicologist with experience in multiple areas of the environmental health field, including metals toxicology, neurotoxicology, industrial hygiene/exposure assessment, epidemiology, environmental chemistry, and risk assessment.  Prior to joining Gradient, Dr. Cook earned his doctoral degree at the University of Washington in Seattle, where he studied neurological effects in humans occupationally exposed to respirable manganese, and explored underlying modes of action using in vitro experimental methods. He has authored or co-authored original research articles, review articles, and book chapters regarding neurotoxicology and neuropathology.

    Education

    Ph.D., Environmental Toxicology, University of Washington

    M.S., Industrial Hygiene, University of Washington

    B.S., Biochemistry & Molecular Biology, University of Minnesota Duluth

    B.A., Chemistry, University of Minnesota Duluth

    Expertise

    • Metals
    • Risk Assessment
    • Toxicology
    • Neurotoxicology
    • Industrial Hygiene

      Representative Projects

      Immunotoxicity Hazard Assessment of PFOA/PFOS: Critically evaluated literature pertaining to the immunotoxicity of a class of environmentally persistent chemicals.  Developed and submitted comments on the National Toxicology Program's evaluation of these chemicals as part of the public comment period.

      Occupational Cancer Assessment: Provided litigation support in a case involving a claim of occupational cancer at a fiber glass manufacturing facility. Evaluated case facts including occupational exposures and relevant medical history to develop a causation opinion.

      Chemical Hazard Assessments: Conducted toxicological hazard assessments on various chemicals for REACH regulatory compliance for a global energy services company. Compiled and evaluated relevant human health and ecological data to classify potential hazards according to Globally Harmonized System guidance.

      Dermal Hazard Assessments: Performed hazard assessments and quantitative risk assessments for the constituents of various consumer products designed to be in long-term contact with the skin. Identified potential chemicals of concern and established exposure levels intended to protect consumers from experiencing adverse skin reactions.

      Occupational Hazard Identification: Identified potential health and safety concerns in the manufacturing process of a hazardous substance. Critically evaluated the process and recommended strategies for minimizing employee risk of adverse health effects.

      Sampling and Quality Control Assessment: Worked with a team on a large scale project aimed at eradicating mold with chlorine dioxide gas at a hospital in California. Prepped site with chemical and biological indicators to ensure quality control. Monitored chlorine dioxide levels through the fumigation process via impingement sampling.

      Ultrasound Hazard Evaluation: Assessed the potential for adverse health effects resulting from anticipated consumer use and/or misuse of an electronic gaming device designed to emit ultrasound as a means of providing user tactile interaction. Conducted a review of all adverse health effects associated with exposure to ultrasound, evaluated the probability of experiencing any of those effects under a number of normal and abnormal product usage scenarios, and recommended approaches to minimizing the risk of users to experience adverse effects.

      Selected Publications

      Cook, TJ; Hoekstra, JG; Stewart, T; Canales, KK; Gonzalez-Cuyar, LF; Racette, BA; Nelson, G; Checkoway, H; Eaton, DL; Zhang, J.  2016. "Astroglial Mortalin is Decreased in the Striatum of Manganese-Exposed Mine Workers and Enhances Neurotoxicity." Presented at the Society of Toxicology (SOT) 55th Annual Meeting, New Orleans, LA, March 13-17