Spring 2023

What’s New at Gradient

Awards and Announcements


Barbara D. Beck was awarded the Society of Toxicology (SOT) Metals Specialty Section Career Achievement Award at the SOT 62nd Annual Meeting for her achievements in the field of metals toxicology.

Joel M. Cohen was co-author on a poster awarded best in the Medical Device and Combination Product Specialty Section category of the scientific proceedings in the SOT 62nd Annual Meeting.  The title of the winning poster was “Characterization of the ISO Database of Reference Chemicals for Interlaboratory Studies to Demonstrate the Applicability of OECD Methods to Assess Skin Sensitization of Medical Devices.”

Joel M. Cohen was elected to serve as ​councilor of the SOT Computational Toxicology Specialty Section Executive Council.

Isaac Mohar was awarded Top 10 abstract in the Computational Toxicology Specialty Section category as part of the scientific proceedings in the SOT 62nd Annual Meeting. The title of the winning abstract was “Frameworks for In Silico Toxicity Screening of Novel Odorants.”

Ari Lewis was appointed to the US EPA Science Advisory Board (SAB) EJScreen Review Panel.

Matthew J. Mayo was re-elected as vice chair of the Lancaster, MA, Zoning Board of Appeals.

Andrew Yeh has been appointed to the Board of Directors of the Adopt A Stream Foundation (AASF), a non-profit organization in the State of Washington that focuses on environmental education (e.g., wildlife biology and ecology) and stream restoration (e.g., removing physical barriers for fish migrating through streams).

Andrew Yeh will serve as senior councilor of the Pacific Northwest Association of Toxicologists (PANWAT) for the 2023-2024 term.

A. Dallas Wait was appointed as an expert to the American Herbal Product Association (AHPA) Botanical Safety Handbook Expert Advisory Council.



Boomhower, SR; Goodman, JE; Long, CM; Manidis, TD. 2023. “Letter to the Editor: A replication of the personal-ambient PM2.5 meta-correlation.” Environ. Pollut. 322:121148. doi: 10.1016/j.envpol.2023.121148.

Drury, NL; Mustapha, T; Shore, RA; Zhao, J; Wright, GA; Rodrigues Hoffman, A; Talcott, SU; Regan, A; Tighe, RM; Zhang, R; Johnson, NM. 2023. “Maternal exposure to ultrafine particles enhances influenza infection during pregnancy.” Part. Fibre Toxicol. 20:11. doi: 10.1186/s12989-023-00521-1.

Goodman, JE; Ticknor, RC; Zhou, J. 2022. “Response: Alternative approaches for systematic review.” Global Epidemiol. doi: 10.1016/j.gloepi.2022.100091.

Goodman, JE; Becich, MJ; Bernstein, DM; Case, BW; Mandel, JH; Nel, AE; Nolan, R; Odo, NU; Smith, SR; Taioli, E; Gibbs, G. 2023. “Nonasbestiform elongate mineral particles and mesothelioma risk: Human and experimental evidence.” Environ. Res. doi: 10.1016/j.envres.2022.114578.

Upcoming Presentations


Smithers Extractables and Leachables USA 2023. May 17-18, 2023. Washington, DC.

  • “Towards Good Read-Across Practice in Medical Device Risk Assessment.” J. Cohen.

Air & Waste Management Association (A&WMA) 116th Annual Conference & Exhibition. June 5-8, 2023. Orlando, FL.

  • “Evaluating Exposure and Risk in Communities with EJ Concerns: Uses and Limitations of Publicly Available Geographic Information System (GIS)-Based Tools.” N. Slagowski, J. Lemay, A. Lewis.

Previously Presented


PharmaEd Extractables & Leachables Summit 2023. April 17-18, 2023. Philadelphia, PA.

  • “What the Regulations Don’t Tell You About Medical Devices – Differences in Expectations Between US FDA CDRH and EU MDR for E&L and Biocompatibility.” J. Zhang, I. Mohar.

Semiconductor Environmental Safety and Health Association (SESHA) 45th Annual Symposium. April 24-27, 2023. Phoenix, AZ.

  • “When Molecules Fall Apart: Assessment of Chemicals That Dissociate.” J. Kneeland, C. Butler, A. Lewis.
  • “Environmental Justice and Semiconductor Product Stewardship.” A. Lewis.

Society of Environmental Toxicology and Chemistry (SETAC) Europe 33rd Annual Meeting. April 30-May 4, 2023. Dublin, Ireland.

  • “Comparing the Sensitivity of Predicted Environmental Concentrations of Pharmaceuticals Using Empirical and Quantitative Structure-Activity Relationship (QSAR)-Derived Physico-chemical Parameters.” J. Rominger, T. Verslycke, W. Hoque.
  • “Screening Assessment of Endocrine Disruption Properties of a Large Portfolio of Petroleum-Related UVCB Substances.” T. Verslycke, A. Lewis, T. Manidis, D. Lyon, N. Synhaeve, G. Hinkal, L. Saunders.
  • “An Update Concordance Assessment of Predicted No-Effect Concentration (PNEC) Aquatic Toxicity Data for Pharmaceuticals.” T. Verslycke, I. Bamgbose.

American Society for Testing and Materials (ASTM) Workshop on Setting Acceptance Limits for Medical Device Cleaning Validation. May 9, 2023. Denver, CO.

  • “Integrating Medical Device Cleaning Validation with Established Toxicological Risk Assessment Methodology.” I. Mohar, L. Borton, J. Cohen.

By the Way… 


Three out of ten Americans say that their brains “shut down” when they encounter any form of data.