Research Topics
| David A AlvarezSummaryAffiliation: U.S. Geological Survey Country: USA Publications
| Collaborators
|
Detail Information
Publications
Bioassay of estrogenicity and chemical analyses of estrogens in streams across the United States associated with livestock operationsD A Alvarez
U S Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, MO 65201, USA Electronic address
Water Res 47:3347-63. 2013..POCIS resulted in more frequent detections of estrogens than discrete water samples across all sites, even when applying the less-sensitive YES bioassay to the POCIS extracts...- Bottom sediment as a source of organic contaminants in Lake Mead, Nevada, USADavid A Alvarez
U S Geological Survey, Columbia Environmental Research Center, 4200 E New Haven Road, Columbia, MO 65201, USA
Chemosphere 88:605-11. 2012..There was evidence to suggest that the water infiltrated into the sediment had a different chemical composition than the rest of the water column and could be a potential risk exposure to bottom-dwelling aquatic organisms... - Reproductive health of bass in the Potomac, U.S.A., drainage: part 2. Seasonal occurrence of persistent and emerging organic contaminantsDavid A Alvarez
U S Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201, USA
Environ Toxicol Chem 28:1084-95. 2009..The bioluminescent yeast estrogen screen in vitro assay of the POCIS extracts indicated the presence of chemicals that were capable of producing an estrogenic response at all sampling sites... 
Development of a passive, in situ, integrative sampler for hydrophilic organic contaminants in aquatic environmentsDavid A Alvarez
U S Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201, USA
Environ Toxicol Chem 23:1640-8. 2004..These values are in agreement with reported levels found in traditional grab samples taken concurrently...- Comparison of a novel passive sampler to standard water-column sampling for organic contaminants associated with wastewater effluents entering a New Jersey streamD A Alvarez
US Geological Survey, CERC, 4200 New Haven Road, Columbia, MO 65201, USA
Chemosphere 61:610-22. 2005.... - Chemical and toxicologic assessment of organic contaminants in surface water using passive samplersDavid A Alvarez
U S Geological Survey Columbia Environmental Research Center, 4200 New Haven Road, Columbia, MO 65201, USA
J Environ Qual 37:1024-33. 2008..Screening using Microtox resulted in no acutely toxic samples. POCIS samples screened by the YES assay failed to elicit a positive estrogenic response... - Reproductive health of bass in the Potomac, U.S.A., drainage: part 1. Exploring the effects of proximity to wastewater treatment plant dischargeLuke R Iwanowicz
National Fish Health Research Laboratory, U S Geological Survey, 11649 Leetown Road, Kearneysville, West Virginia 25430, USA
Environ Toxicol Chem 28:1072-83. 2009..It appears that proximity to effluent from WWTPs may influence the reproductive health of bass in the Potomac watershed, but inputs from other sources likely contribute to the widespread, high incidence of testicular oocytes... - Overview and comparison of lipid-containing semipermeable membrane devices and oysters (Crassostrea gigas) for assessing organic chemical exposureJames N Huckins
U S Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201, USA
Environ Toxicol Chem 23:1617-28. 2004..However, both sampling approaches have advantages and disadvantages, and the appropriateness of their use depends on the goals of a given study... 
Reproductive endocrine disruption in smallmouth bass (Micropterus dolomieu) in the Potomac River basin: spatial and temporal comparisons of biological effectsVicki S Blazer
National Fish Health Research Laboratory, U S Geological Survey, Leetown Science Center, 11649 Leetown Road, Kearneysville, WV 25430, USA
Environ Monit Assess 184:4309-34. 2012..An association between TO severity and wastewater treatment plant flow, percent of agriculture, total number of animal feeding operations, the number of poultry houses, and animal density within the catchment was observed...- Development of the permeability/performance reference compound approach for in situ calibration of semipermeable membrane devicesJames N Huckins
Columbia Environmental Research Center, US Geological Survey, Columbia, Missouri 65201, USA
Environ Sci Technol 36:85-91. 2002..Finally, our findings indicate that the use of PRCs permits prediction of in situ SPMD sampling rates within 2-fold of directly measured values... - Semivolatile organic compounds in residential air along the Arizona-Mexico borderRobert W Gale
Columbia Environmental Research Center, United States Geological Survey, 4200 New Haven Road, Columbia, Missouri 65201, USA
Environ Sci Technol 43:3054-60. 2009..The results presented in this study demonstrate unequivocally that the mixture of airborne chemicals present indoors is far more complex than previously demonstrated... - Sources and distribution of organic compounds using passive samplers in Lake Mead national recreation area, Nevada and Arizona, and their implications for potential effects on aquatic biotaMichael R Rosen
Nevada Water Science Center, U S Geological Survey, 2730 N Deer Run Rd, Carson City, NV 89701, USA
J Environ Qual 39:1161-72. 2010..The lateral and vertical distribution of SOCs is discussed in the context of other studies that have shown impaired health of fish exposed to SOCs... - Purification of triolein for use in semipermeable membrane devices (SPMDs)J A Lebo
USGS, Columbia Environmental Research Center, Columbia, MO 65201, USA
Chemosphere 54:1217-24. 2004..Yeast estrogen screen (YES) testing of SPMDs fabricated with unpurified and purified triolein demonstrates that the purification process removes all background estrogenic activity... - A holistic passive integrative sampling approach for assessing the presence and potential impacts of waterborne environmental contaminantsJ D Petty
US Geological Survey, Columbia Environmental Research Center, Columbia, MO 65201, USA
Chemosphere 54:695-705. 2004..g., ibuprofen, oxindole, etc.) were detected in the wastewater. Herein we summarize the results of the analysis of the field-deployed samplers and demonstrate the utility of this holistic approach... - Chemical contaminants in water and sediment near fish nesting sites in the Potomac River basin: Determining potential exposures to smallmouth bass (Micropterus dolomieu)Dana W Kolpin
U S Geological Survey, Iowa Water Science Center, 400 S Clinton Street, Iowa City, IA 52244, United States Electronic address
Sci Total Environ 443:700-16. 2013..Such significant correlations do not necessarily imply causation, as these chemical compositions and concentrations likely do not adequately reflect total SMB exposure history, particularly during critical life stages... - Trends in monitoring pharmaceuticals and personal-care products in the aquatic environment by use of passive sampling devicesGraham A Mills
School of Pharmacy and Biomedical Sciences, University of Portsmouth, White Swan Road, Portsmouth, UK
Anal Bioanal Chem 387:1153-7. 2007