A5091630928- Pesticide and Herbicide Environmental Studies
- Environmental Toxicology and Ecotoxicology
- Pesticide Exposure and Toxicity
- Pharmaceutical and Antibiotic Environmental Impacts
- Reproductive biology and impacts on aquatic species
- Insect and Pesticide Research
- Analytical Chemistry and Chromatography
- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Phosphorus and nutrient management
- Water Quality Monitoring and Analysis
- Industrial Gas Emission Control
- Insect and Arachnid Ecology and Behavior
- Metabolomics and Mass Spectrometry Studies
- Air Quality Monitoring and Forecasting
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Pesticide Residue Analysis and Safety
- Plant Micronutrient Interactions and Effects
- Radioactivity and Radon Measurements
- Soil and Water Nutrient Dynamics
- Sperm and Testicular Function
- Analytical chemistry methods development
- Zebrafish Biomedical Research Applications
- Geochemistry and Geologic Mapping
- Heavy metals in environment
University of California, Riverside
2014-2019
Oklahoma State University
2009-2012
Abstract Bifenthrin is a pyrethroid insecticide used in urban and agricultural applications. Previous studies have shown that environmentally relevant (ng/L) concentrations of bifenthrin increased plasma 17β‐estradiol (E2) altered the expression dopaminergic pathway components. The neurons can indirectly regulate E2 biosynthesis, suggesting may disrupt hypothalamic–pituitary–gonadal (HPG) axis. Because embryos do not complete HPG axis, hypothesis impairs dopamine regulation was tested...
Micronutrient availability is important to crop production and can be affected by long-term application of P organic amendments. This study was conducted determine the effects different sources rates on extractable [DTPA-sorbitol (diethylenetriamine-pentaacetic acid sorbitol] micronutrients. Soil total micronutrients (B, Cu, Fe, Mn, Mo, Zn), pH, matter content were determined from sites across Oklahoma that had received applications beef manure, swine effluent, biosolids, or commercial...
Natural background concentrations of trace elements in soils must be determined to establish baseline levels for soil remediation and avoid the establishment inaccurate or unrealistic guideline levels. The objectives this study were total element including As, Cd, Cr, Cu, Mn, Mo, Ni, Se, Pb, Zn 28 Oklahoma benchmark determine relationship between properties natural concentrations. Soil samples analyzed elements, pH, organic C, clay content, oxalate‐extractable Al (Al ox ) Fe (Fe ). Both...
The Mehlich 3 (M3) method is widely used to extract plant-available phosphorus from soil over a wide range of pH values. also by many laboratories determine multiple nutrients simultaneously. However, except for P, this has not been statistically validated within and among laboratories. objective study was the repeatability (within-laboratory performance) reproducibility (among-laboratories M3 several different using variety soils. An in-house homogeneity test conducted 11 Three replicates...
The urban use of pyrethroids has been associated with the contamination and toxicity surface water. A less considered phenomenon is that many may be transformed to a common intermediate, 3-phenoxybenzoic acid (3-PBA), an endocrine-disrupting compound. Here we examined conversion five pyrethroids, permethrin, λ-cyhalothrin, deltamethrin, fenpropathrin, esfenvalerate, 3-PBA on concrete. Formation was almost instantaneous, reaching up 3% initial level within hours exposure, caused mainly by...
The purpose of this study was to involve pest management professionals in the design application techniques and strategies that would be efficacious also reduce insecticide runoff. Our involved measuring both efficacy treatments for Argentine ant, Linepithema humile (Mayr), concurrent runoff fipronil pyrethroids. Two collaborating companies used low-impact protocols controlling ants while minimizing Protocol 1 bimonthly treatments, 2 monthly. Both an initial treatment with a spray around...