Search Results - "Spurlock, Frank"

Modeling complexity in simulating pesticide fate in a rice paddy by Luo, Yuzhou, Spurlock, Frank, Gill, Sheryl, Goh, Kean S.

“…Modeling approaches for pesticide regulation are required to provide generic and conservative evaluations on pesticide fate and exposure based on limited data…”
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Effect of Aging on Desorption Kinetics of Sediment-associated Pyrethroids by Xu, Yiping, Gan, Jay, Wang, Zijian, Spurlock, Frank

“…Pyrethroids are insecticides commonly used in both agricultural and urban environments. Residues of pyrethroids frequently are found in bed sediments of…”
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Wash-off potential of urban use insecticides on concrete surfaces by Jiang, Weiying, Lin, Kunde, Haver, Darren, Qin, Sujie, Ayre, Gilboa, Spurlock, Frank, Gan, Jay

“…Contamination of surface aquatic systems by insecticides is an emerging concern in urban watersheds, but sources of contamination are poorly understood,…”
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Comparison Of Five Methods For Measuring Sediment Toxicity Of Hydrophobic Contaminants by Xu, Yiping, Spurlock, Frank, Wang, Zijian, Gan, Jay

“…Sediment toxicity from hydrophobic organic compounds (HOCs) is complicated by chemical partitioning among multiple phases and sediment-specific…”
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Use-exposure relationships of pesticides for aquatic risk assessment by Luo, Yuzhou, Spurlock, Frank, Deng, Xin, Gill, Sheryl, Goh, Kean

“…Field-scale environmental models have been widely used in aquatic exposure assessments of pesticides. Those models usually require a large set of input…”
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Using disposable polydimethylsiloxane fibers to assess the bioavailability of permethrin in sediment by Hunter, W, Xu, Y, Spurlock, F, Gan, J

“…Pyrethroid insecticides are widely used in both agricultural and urban environments. Pyrethroids have been frequently detected in California, USA, stream bed…”
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Vegetated ditches as a management practice in irrigated alfalfa by Gill, Sheryl L., Spurlock, Frank C., Goh, Kean S., Ganapathy, Carissa

“…The organophosphate (OP) insecticides diazinon and chlorpyrifos have been frequently detected in the San Joaquin River, California, USA. Irrigation tail waters…”
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Characterizing Dependence of Pesticide Load in Surface Water on Precipitation and Pesticide Use for the Sacramento River Watershed by Guo, Lei, Nordmark, Craig E, Spurlock, Frank C, Johnson, Bruce R, Li, Linying, Lee, J. Marshall, Goh, Kean S

“…Transport of pesticides by surface runoff during rainfall events is a major process contributing to pesticide contamination in rivers. This study presents an…”
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Summary of Well Water Sampling in California to Detect Pesticide Residues Resulting from Nonpoint‐Source Applications by Troiano, John, Weaver, Don, Marade, Joe, Spurlock, Frank, Pepple, Mark, Nordmark, Craig, Bartkowiak, Donna

“…ABSTRACT This report summarizes well sampling protocols, data collection procedures, and analytical results for the presence of pesticides in ground water…”
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Environmental fate and toxicology of carbaryl by Gunasekara, Amrith S, Rubin, Andrew L, Goh, Kean S, Spurlock, Frank C, Tjeerdema, Ronald S

“…Carbaryl is an agricultural and garden insecticide that controls a broad spectrum of insects. Although moderately water soluble, it neither vaporizes nor…”
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Thermodynamics of Organic Chemical Partition in Soils. 2. Nonlinear Partition of Substituted Phenylureas from Aqueous Solution by Spurlock, Frank C, Biggar, James W

“…A study examined the sorption behavior of five substituted phenylureas of varying hydrophobicity over wide ranges in equilibrium solution concentration. The…”
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Analysis of Chlorpyrifos Agricultural Use in Regions of Frequent Surface Water Detections in California, USA by Zhang, Xuyang, Starner, Keith, Spurlock, Frank

“…Chlorpyrifos is a common surface water contaminant in California, USA. We evaluated five years of chlorpyrifos use and surface water monitoring data in…”
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Modeling variation in 1,3-dichloropropene emissions due to soil conditions and applicator practices by Brown, Colin R., Kandelous, Maziar, Sartori, Fabio, Collins, Christopher, Spurlock, Frank

“…The fumigant 1,3-dichloropropene (1,3-D) is widely used for control of soil-borne pests and pathogens, but post-application emissions may lead to off-site…”
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Pesticide concentrations in water and sediment and associated invertebrate toxicity in Del Puerto and Orestimba Creeks, California, 2007-2008 by Ensminger, Michael, Bergin, Rick, Spurlock, Frank, Goh, Kean S

“…The California's San Joaquin River and its tributaries including Orestimba (ORC) and Del Puerto (DPC) Creeks are listed on the 2006 US EPA Clean Water Act…”
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Thermodynamics of Organic Chemical Partition in Soils. 1. Development of a General Partition Model and Application to Linear Isotherms by Spurlock, Frank C, Biggar, James W

“…A study evaluated sorbed-phase partial molar free energies for organic carbon-based soil sorption in terms of the Flory-Huggins theory. The conventional…”
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Isotherm nonlinearity and nonequilibrium sorption effects on transport of fenuron and monuron in soil columns by Spurlock, Frank C, Huang, Kangle, van Genuchten, Martinus Th

“…The influence of nonlinear sorption and prior sorbate/sorbent exposure time on transport of fenuron and monuron in laboratory soil columns was studied…”
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DISTRIBUTION AND VARIANCE/COVARIANCE STRUCTURE OF PESTICIDE ENVIRONMENTAL FATE DATA by Spurlock, F

“…Hydrophobicity, persistence, and volatility data for individual pesticides are widely used in risk assessment and transport modeling, so it is important to…”
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Analysis of pyrethroids in sediment pore water by solid-phase microextraction by Bondarenko, S, Spurlock, F, Gan, J

“…Sediment toxicity from trace contamination of pyrethroid insecticides is an emerging water quality concern. Pyrethroids are highly hydrophobic, and their…”
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Thermodynamics of Organic Chemical Partition in Soils. 3. Nonlinear Partition from Water-Miscible Cosolvent Solutions by Spurlock, Frank C, Biggar, James W

“…A study examined the solubility and partitioning behavior of four substituted phenylureas in various aqueous methanol (MeOH) and aqueous dimethyl sulfoxide…”
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Effect of suspended solids on bioavailability of pyrethroid insecticides by Yang, Weichun, Gan, Jianying, Hunter, Wesley, Spurlock, Frank

“…Runoff and surface‐water effluents commonly contain suspended solids. Adsorption to suspended particles and the associated dissolved organic matter (DOM) may…”
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