1. University of Texas at El Paso, Biological Sciences Department, 500 West University Avenue, El Paso, Texas 79968, USA
2. University of Texas at El Paso, Chemistry Department, 500 West University Avenue, El Paso, Texas 79968, USA
3. National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Ft. Johnson Road, Charleston, South Carolina 29412, USA