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Education

• Ph.D. in Agricultural and Environmental Chemistry, University of California, Davis
• Bachelor of Science in Chemistry with a Minor in Environmental Toxicology, University of California, Davis

Biography

Zachary Redman, Ph.D. is currently responsible for teaching general and analytical chemistry. His research interests center on the application of modern analytical chemistry techniques and instrumentation to advance our understanding of environmental processes. Current research projects include the study of (1) photochemical degradation mechanisms and product formation of current and emerging sub-Arctic aquatic contaminants under high-latitude conditions; (2) hydrocarbon oxidation product photochemical formation and dissolution in simulated oil spills; (3) the impact of glacier recession on seasonal dissolved organic matter character and nutrient transport in high-latitude streams; and (4) the weathering, occurrence, and toxicological effects of microplastics in the Arctic and sub-Arctic. Additional efforts include establishing analytical workflows, maintaining instrumentation, and training researchers in the ASET Lab.

Teaching Responsibilities

• CHEM A105: General Chemistry I
• CHEM A106: General Chemistry II
• CHEM A218: Experiential Learning: Quantitative Chemical Analysis
• CHEM A418: Experiential Learning: Chemical Instrumentation and Methods

Publications

Underline indicates undergraduate co-authors. 

Umanzor, S.; Jung, J.W.; Dittrich, M.; Kim, J.K.; Tomco, P.L.; Redman, Z.C.; Brandhuber, M. Divergent Patterns of Metabolite Expression in Red Seaweeds (Devaleraea mollis and Palmaria hecatensis) Following Nitrate and Ammonium Supplementation. Life. 2025, 15, 143. DOI: 10.3390/life15020143

DiMento, B.; Hillestad, I.; Sommer, J.; Pavia, A.; Niquelina, S.; Tomco, P.L.; Redman, Z.C. Temperature and hydroxyl radical abundance limit the photochemical degradation kinetics and photoproducts of fluridone in high-latitude aquatic systems. ES&T Water. 2025. DOI: 10.1021/acsestwater.4c00880

Redman, Z.C.; Robine, S.; Burkhead, J.; Tomco, P.L. Non-target analysis of photochemically produced hydrocarbon oxidation products of crude oil at high latitudes and their biological effects. Chemosphere. 2024. DOI: 10.1016/j.chemosphere.2024.141794

Redman, Z.C.; Begley, J.L.; Hillestad, I.; DiMento, B.P.; Stanton, R.S.; Aguaa, A.R.; Pirrung, M.C.; Tomco, P.L. Reactive oxygen species and chromophoric dissolved organic matter drive the aquatic photochemical pathways and photoproducts of 6PPD-Quinone under simulated high-latitude conditions. Environ. Sci. Technol. 2023. DOI: 10.1021/acs.est.3c05742.

Harsha, M.; Redman, Z.C.; Wesolowski, J.; Podgorski, D.; Tomco, P.L. Photochemical Formation of Water-Soluble OxyPAHs, Naphthenic Acids, and Other Hydrocarbon Oxidation Products from Cook Inlet, AK Crude Oil and Diesel in Seawater. Environmental Science: Advances. 2023, 2, 447-461. DOI: 10.1039/D2VA00325B

Graziano, G.; Tomco, P.; Seefeldt, S.; Mulder, C. P. H.; Redman, Z.C. Herbicides in unexpected places: non-target impacts from tree root exudation of aminopyralid and triclopyr following basal bark treatments of invasive chokecherry (Prunus padus) in Alaska. Weed Science. 2022, 70, 706–714. DOI: 10.1017/wsc.2022.61.

Whisenhant, E.; Zito, P.; Podgorski, D.; Mckenna, A.; Redman, Z.C.; Tomco, P.L. Unique Molecular Features of Water-Soluble Photo-oxidation Products Among Refined Fuels, Crude Oil, and Herded Burn Residue under High Latitude Conditions. ES&T Waters, 2022. DOI: 10.1021/acsestwater.1c00494

Couture, J.M.; Redman, Z.C.; Bozzini, J.; Massengill, R; Dunker, K.; Briggs, B.; Tomco, P.L. Field and Laboratory Characterization of Rotenone Attenuation in Eight Lakes of the Kenai Peninsula, Alaska. Chemosphere 2022, 288, 132478. DOI: 10.1016/j.chemosphere.2021.132478

Redman, Z.C.; Wesolowski, J.; Tomco, P.L. Photochemical Pathways of Rotenone and Deguelin Degradation: Implications for Rotenoid Attenuation and Persistence in High-Latitude Lakes. Environ. Sci. Technol. 2021. DOI: 10.1021/acs.est.1c00129

Redman, Z.C.; Brodnax, K.; Couture, J.; Tomco, P.L. Identification of Rotenone and Five Rotenoids in CFT Legumine Piscicide Formulation via High Resolution Mass Spectrometry and a New High-Throughput Extraction Procedure. Chromatographia 2021, 84, 207-214. DOI: 10.1007/s10337-020-03987-9

Redman, Z.C.; Anastasio, C; Tjeerdema, R.S. Quantum Yield for the Aqueous Photochemical Degradation of Chlorantraniliprole and Simulation of its Environmental Fate in a Model California Rice Field. Environ. Toxicol. Chem. 2020, 39, 1929-1935. DOI: 10.1002/etc.4827

Hengel, M.J.; Wong, J.W.; Redman, Z.C.; Rering C.; Williams K. Analysis of Pesticides in Plant Foods by QuEChERS and Gas Chromatography-Mass Spectrometry: An Undergraduate Laboratory Experiment. J. Chem. Ed. 2020, 97, 226-233.

Redman, Z.C.; Tran, K.H.; Parikh, S.J.; Tjeerdema, R.S. Influence of pH and Divalent Metals Relevant to California Rice Fields on the Hydroxide-Mediated Hydrolysis of the Insecticide Chlorantraniliprole. J. Agric. Food Chem. 2019, 67, 12402-12407.

Redman, Z.C.; Parikh, S.J.; Hengel, M.J.; Tjeerdema, R.S. Influence of Flooding, Salinization and Soil Properties on Degradation of Chlorantraniliprole in California Rice Field Soils. J. Agric. Food Chem. 2019, 67, 8130-8137.

Redman, Z.C.; Tjeerdema, R.S. Impact of Simulated California Rice-Growing Conditions on Chlorantraniliprole Partitioning. J. Agric. Food Chem. 2018, 66, 1765-1772.

Mulligan, R.A.; Redman, Z.C.; Keener, M.R.; Ball, D.B.; Tjeerdema, R.S. Photodegradation of clothianidin under simulated California rice field conditions. Pest Man. Sci. 2016, 72, 1322-1327.