Aggregation and Degradation of Dispersants and Oil by Microbial Exopolymers (ADDOMEx) Gulf of Mexico Research Initiative

Research Scientists :

Dr. Kathleen A. Schwehr

Dr. Kathleen A. Schwehr

Dr. Kathleen A. Schwehr, as an associate research scientist for the LOER and a lead investigator for ADDOMEx. She will also be the data manager for the ADDOMEx project. Dr. Schwehr will help oversee postdocs, graduate, and undergraduate students, as well as lead the physical chemical characterization of the EPS-Oil-Corexit mixtures. Dr. Schwehr has 9 years of experience in biogeochemical nutrient cycling in oceanographic and aquatic systems, and in the interaction of trace elements with natural organic matter and EPS. To learn more, visit http://loer.tamug.edu/people.htm

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Dr. Andrew Irwin

Dr. Andrew Irwin

Dr. Andrew Irwin (Department Head, Math & Computer Science, Mount Allison University) uses mathematical and statistical models to study phytoplankton physiology and ecology at the population and community level. I will be using bioinformatics tools to analyze RNA transcript data together with physiological data. We are seeking molecular evidence for phytoplankton physiological responses to oil and dispersants used during oil spills. We will use a combination of differential expression of transcripts and predicted gene function to develop a picture of physiological acclimation and stress responses. To learn more, visit http://mmab.ca/

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Dr. Chen Xu

Dr. Chen Xu

Dr. Chen Xu, assistant research scientist and lead investigator for ADDOMEx, is responsible for day to day operations and management, as well as for EPS separation, purification, EPS and marine particles/aggregates characterization, in collaboration with the Hatcher Lab with several state-of-the-art instrumentation including NMR and ESI-FT-ICR-MS. Dr. Xu has more than ten years of experience in the studies of 1) biogeochemistry of natural organic matter in aquatic environments, in particular amphiphilic exopolymeric substances (EPS) excreted by microorganisms (algae and bacteria), their composition at the molecular level and how the composition of mobile or immobile colloidal carriers of radionuclides (e.g., 129I, 234Th, 239,240Pu, etc.) relates to removal from the water or immobility in soil and groundwater; 2) The application of natural (e.g., 238U, 234Th, 233Pa, 237Np) and man-made radionuclides (e.g., 137Cs, 129I, 239, 240Pu, 3H) as tracers and geochronometers to investigate fate and transport of NOM as well as inorganic and organic toxicants in the aquatic environment. To learn more, visit http://loer.tamug.edu/people.htm

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Gerardo

Dr. Gerardo Gold

Texas A&M University, Department of Oceanography

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chi

Dr. Chi-Shuo Chen

National Tsing Hua University, Department of Biomedical Engineering and Environmental Sciences

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