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The research in our lab has been advanced through the efforts of a large group of colleagues, including talented technical staff, students, postdoctoral fellows, and collaborators. Some current and former members of our lab are noted below. If you are interested in joining the lab, please contact us.

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Mark E. Hahn, Ph.D.

Senior Scientist

Mark obtained his Ph.D. in toxicology in 1988 from the University of Rochester School of Medicine and Dentistry. He came to WHOI in 1987 to conduct research in marine toxicology and the use of aquatic animal models for biomedical research.



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Sibel I. Karchner, Ph.D.

Research Specialist

Sibel Karchner received her Ph.D. in biology in 1992 from Texas Tech University. She has been at WHOI and a member of Mark Hahn's team since 1993. Her main research interests are regulation of gene expression in environmental adaptation, and evolution of genes involved in the organismal response to environmental stressors.




Bryan D. James, Ph.D.

Postdoc Scholar

Bryan obtained his Ph.D. from the University of Florida in 2021 in Materials Science and Engineering. He started his postdoctoral work at WHOI in August 2021 with  joint appointments in the Department of Marine Chemistry and Geochemistry and Department of Biology working with Drs. Christopher Reddy and Mark Hahn. He is investigating the fate, persistence, and toxicity of plastic pollution for designing next generation materials, using zebrafish as a model organism.



Chesna A. Mandl, B.S.

Research Assistant II

Chesna joined the Aluru-Hahn-Goldstone lab groups in October 2022. She received her B.S. in Biological Sciences in 2021 at University of Maryland, College Park, MD.



Jordan Avery Pitt, B.S.

Ph.D. Student in the MIT-WHOI Joint Program in Oceanography and Oceanographic Engineering

Jordan Pitt's research focuses on the presence and effects of microplastics and nanoplastics in the marine environment. She is the recipient of an NSF Graduate Fellowship.


Directory: Jordan Pitt web page

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Diana G. Franks

(Some of the) Former Members of Our Lab