Barrie Webster - Full Journal Papers



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D.F. Malley, K.N. Hunter, and G.R.B. Webster. 1999 Analysis of Diesel Fuel Contamination in Soils by Near-Infrared Reflectance Spectrometry and Solid Phase Microextraction-Gas Chromatography, J. Soil Contam. 8: 481-489

A.T. Fisk, S.C. Wiens, G.R.B. Webster, A. Bergman, and D.G.C. Muir. 1998. Accumulation and depuration of sediment-sorbed C12- and C16-polychlorinated alkanes by oligochaetes (Lumbriculus variegatus). Environ. Toxicol. Chem..

Heng Jin and G.R.B. Webster. 1998. Persistence, penetration, and surface availability of cypermethrin and its major metabolites in elm bark, J. Agric. Food Chem. 46(7): 2851-2857.

Heng Jin and G.R.B. Webster. 1998. Dissipation of cypermethrin and its major metabolites in litter and elm forest soil, J. Environ. Sci. Health B.

A-M. Tugulea, L.P. Sarna, and G.R.B. Webster. 1998. Solid Phase Microextraction (SPME) of the Herbicide Atrazine in Aqueous Soil Suspensions, Internat. J. Environ. Anal. Chem. 68: 137-153.

Heng Jin and G.R.B. Webster. 1997. Persistence, penetration, and surface availability of chlorpyrifos, its oxon, and 3,5,6-trichloro-2-pyridinol in elm bark, J. Agric. Food Chem. 45: 4871-4876.

Heng Jin and G.R.B. Webster. 1997. GC-ECD determination of chlorpyrifos, its oxon, and 3,5,6-trichloro-2-pyridinol in soil, elm bark, and litter in control of elm bark beetles, Internat. J. Environ. Anal. Chem..

Heng Jin and G.R.B. Webster. 1997. Dissipation of chlorpyrifos, oxon, and 3,5,6-trichloro-2-pyridinol in litter and elm forest soil, J. Environ. Sci. Health B 32, 879-900..

Heng Jin and G.R.B. Webster. 1997. GC-ECD determination of cypermethrin isomers and their major metabolites in soil, elm bark, and litter, Fresenius J. Anal. Chem. 360: 573-579..

J.D. Gaynor, G.R.B. Webster, L.P. Sarna, K.N. Graham, H.Y.F. Ng., et al. 1996. SPME-GC-EC cf. SPE-GC-MS and ELISA for the determination of metolachlor residues in agricultural runoff and tile drainage water, J. Agric Food Chem. 44: 2736-2741.

S.P. Thomas, R. Sri Ranjan, G.R.B. Webster, and L.P. Sarna. 1996. Protocol for the Analysis of BTEX in Water using Automated Solid Phase Microextraction-GC-FID, Environ. Sci. Technol. 30: 1521-1526.

A. Sundaram, J.W. Leung, G.R.B. Webster, J. Curry, and J. Sloane. 1996. Effect of Glycerol on Spreading and Drying of Vision® Droplets containing Silwet® L-77: Relevance to Rainfastness and Herbicidal Activity of Glyphosate on Trembling Aspen (Populus tremuloides Michx.), J. Environ. Sci. Health B31: 901-912.

H. Jin, G.R.B. Webster, N.J. Holliday, P.A. Pines, and A.R. Westwood. 1996. An Elm Bark Beetle Bioassay for Residual Efficacy of Chlorpyrifos and Cypermethrin used for the Control of Dutch Elm Disease in Manitoba, J. Environ. Sci. Health B31: 751-761.

K.N. Graham, L.P. Sarna, G.R.B. Webster, J.D. Gaynor, and H.Y.F. Ng. 1996. Solid Phase Microextraction (SPME) of the Herbicide Metolachlor in Runoff and Tile Drainage Water Samples, J. Chromatog. 725: 129-136.

K.J. Friesen, G.R.B. Webster, and D.C.G. Muir. 1995. Effect of Mode of Application on the Environmental Fate of Polychlorinated Dibenzo-p-dioxins in Aquatic Ecosystems. Environ. Toxicol. Chem. 14: 1921-1929.

M.D. Segstro, D.C.G. Muir, M.R. Servos, and G.R.B. Webster. 1995. Long-Term Fate and Bioavailability of Sediment-Associated Polychlorinated Dibenzo-p-dioxins in Aquatic Mesocosms, Environ. Toxicol. Chem. 14: 1799-1807.

L.P. Sarna, G.R.B. Webster, M.R. Friesen-Fischer, and R. Sri Ranjan. 1994. Analysis of BTEX in water by commercially available solid phase microextraction and CLOT column capillary gas chromatography, J. Chromatogr. 677: 201-205.

D.S. Gamble, C.H. Langford, and G.R.B. Webster. 1994. Interactions of Pesticides and Metal Ions with Soils: Unifying Concepts, Rev. Environ. Contam. Toxicol. 135: 63-91.

J.W. Leung, A. Sundaram, and G.R.B. Webster. 1993. Optimizing Adjuvant Concentration for Maximum Translocation of Glyphosate in Trembling Aspen, J. Environ. Sci. Health, Part B 28: 505-526.

F.S. Mwangala, L.P.Sarna, G.R.B. Webster, and T.D. Galloway. 1993. Distribution of Permethrin and Fenvalerate on Cattle Hair following Variable Application Rates of Impregnated Ear Tags. Pestic. Sci. 39: 179-184.

G.R.B. Webster, L.P. Sarna, D.F. Kenny, W.D. Buchannon, and J.B. Westmore. 1993. GC-MS Analysis of Bromoxynil Esters: Anomalous Results Explained, J. Agric. Food Chem. 41: 1994-1997.

M.R. Servos, D.C.G. Muir, and G.R.B. Webster. 1992. Environmental Fate of Polychlorinated Dibenzo-p-dioxins in Lake Enclosures. Can. J. Fish. Aquat. Sci. 49:722-734.

M.R. Servos, D.C.G. Muir, and G.R.B. Webster. 1992. Bioavailability of Polychlorinated Dibenzo-p-dioxins in Lake Enclosures. Can. J. Fish. Aquat. Sci. 49:735-742.

D.C.G. Muir, S. Lawrence, M. Holoka, W.L. Fairchild, M.D. Segstro, G.R.B. Webster, and M.R. Servos. 1992. Partitioning of Polychlorinated Dioxins and Furans between Water, Sediments, and Biota in Lake Mesocosms. Chemosphere 25: 119-124.

P. de Voogt, D.C.G. Muir, G.R.B. Webster, and H. Govers. 1990. Quantitative Structure-Activity Relationships for the Bioconcentration in Fish of Seven Polychlorinated Dibenzodioxins. Chemosphere 21: 1385-1396.

D.T.H.M. Sijm, A.L. Yarachewski, D.C.G. Muir, G.R.B. Webster, W. Seinen, and A. Opperhuizen. 1990. Biotransformation and Tissue Distribution of 1,2,3,7-Tetrachlorodibenzo-p-dioxin, 1,2,3,4,7-Pentachlorodibenzo-p-dioxin, and 2,3,4,7,8-Pentachlorodibenzofuran in Rainbow Trout. Chemosphere 21: 845-866.

D.C.G. Muir, A.L. Yarechewski, D.A. Metner, W.L. Lockhart, G.R.B. Webster, and K.J. Friesen. 1990. Dietary Accumulation and Sustained Hepatic Mixed Function Oxidase Enzyme Induction by 2,3,4,7,8-Pentachlorodibenzofuran in Rainbow Trout. Environ. Toxicol. Chem. 9: 1463-1472.

K.J. Friesen, D.C.G. Muir, and G.R.B. Webster. 1990. Evidence of Sensitized Photolysis of Polychlorinated Dibenzo-p-dioxins in Natural Waters under Sunlight Conditions. Environ. Sci. Technol. 24: 1739-1744.

B.F. Rordorf, L.P.Sarna, G.R.B. Webster, S.H. Safe, L.M. Safe, D.Lenoir, K.H. Schwind, and O. Hutzinger. 1990. Vapor Pressure Measurements on Halogenated Dibenzo-p-dioxins and Dibenzofurans. An Extended Data Set for a Correlation Method. Chemosphere 20: 1603-1609.

K.J. Friesen and G.R.B. Webster. 1990. Temperature Dependence of the Aqueous Solubilities of Highly Chlorinated Dibenzo-p-dioxins. Environ. Sci. Technol. 24: 97-101.

J. Kochany, G.G. Choudhry, and G.R.B. Webster. 1990. Environmental Photolytic Fate of the Herbicide Bromoxynil (3,5-Dibromo-4-hydroxybenzonitrile) in Aquatic Systems containing Soil Fulvic Acids. Internat. J. Environ. Anal. Chem. 39: 59-74.

K.J. Friesen, M.D. Segstro, G.R.B. Webster, and A.E. Smith. 1990. Environmental Fate of 1,2,3,4,7-Pentachloro-p-dioxin in a Canadian Prairie Soil. Internat. J. Environ. Anal. Chem. 39: 187-195.

G.G. Choudhry, M. Foga, G.R.B. Webster, D.C.G. Muir, and K.J. Friesen. 1990. Photochemistry of Halogenated Benzene Derivatives. Part XI. Quantum Yields of the Direct Phototransformation of 1,2,4,7,8-Penta- and 1,2,3,4,7,8-Hexachlorodibenzofuran in Aqueous Acetonitrile and their Sunlight Half-lives. Toxicol. Environ. Chem. 26: 181-195.

J. Kochany, G. G. Choudhry, and G.R.B. Webster. 1990. Soil Organic Matter Chemistry. Part II. Effects of Soil Fulvic Acids on the Environmental Photodecomposition of Bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) Herbicide in Water. Sci. Total Environ. 92: 181-198.

J. Kochany, G.G. Choudhry, and G.R.B. Webster. 1990. Photochemistry of Halogenated Benzene Derivatives. Part IX. Environmental Aquatic Photochemistry of Bromoxynil (3,5-Dibromo-4-hydroxybenzonitrile) Herbicide. Pestic. Sci. 28: 69-81.

J. Kochany, G.G. Choudhry, and G.R.B. Webster. 1990. Photochemistry of Halogenated Benzene Derivatives. X. Effects of Sodium Chloride on the Aquatic Photodegradation of Bromoxynil (3,5-Dibromo-4-hydroxybenzonitrile) Herbicide. Arch. Environ. Contam. Toxicol. 19: 325-331.

M.R. Servos, D.C.G. Muir, and G.R.B. Webster. 1989. The Effect of Particulate and Dissolved Organic Carbon on the Bioavailability of Polychlorinated Dibenzo-p-dioxins. Aquat. Toxicol. 14: 169-184.

G.G. Choudhry, N.J. Graham, and G.R.B. Webster. 1989. Photolytic Formation of 2-Methyl-4,5,6,7-tetrachlorobenzoxazole from Pentachlorophenol in Aqueous Acetonitrile. Studies Environ. Sci. 34: 377-385.

G.R.B. Webster, M.R. Servos, P. Sarna, G.G. Choudhry, and D.C.G. Muir. 1989. Methods for Dissolving Hydrophobics in Water: Interactions with Dissolved Organic Matter. Amer. Chem. Soc. Adv. Chem. Ser. 219: 251-262.

G.G. Choudhry and G.R.B. Webster. 1989. Soil Organic Matter Chemistry. Part 1. Characterization of Several Humic Preparations by Proton and Carbon-13 Nuclear Magnetic Resonance Spectroscopy. Toxicol. Environ. Chem. 23: 227-242.

M.R. Servos, D.C.G. Muir, D.M. Whittle, D.B. Sergeant, and G.R.B. Webster. 1989. Bioavailability of Octachlorodibenzo-p-dioxin in Aquatic Ecosystems. Chemosphere 19: 969-972.

G.G. Choudhry and G.R.B. Webster. 1989. Environmental Photochemistry of PCDDs. Part 2. Quantum Yields of the Direct Phototransformation of 1,2,3,7-Tetra-, 1,3,6,8-Tetra-, 1,2,3,4,6,7,8-Hepta-, and Octachlorodibenzo-p-dioxins in Aqueous Acetonitrile and their Sunlight Half-Lives. J. Agric. Food Chem. 37: 254-262.

G.G. Choudhry and G.R.B. Webster. 1988. Environmental Aquatic Photochemistry of Polychlorophenols (PCPs). NATO ASI Series 237: 621-622.

G.G. Choudhry, G.R.B. Webster, and O. Hutzinger. 1988. Environmental Aquatic Photochemistry of Chlorinated Aromatic Pollutants (CAPs). Toxicol. Environ. Chem. 7: 267-286.

R.L. Corbet, G.R.B. Webster, and D.C.G. Muir. 1988. The Fate of 1,3,6,8-Tetrachlorodibenzo-p-dioxin in an Outdoor Aquatic System. Environ. Toxicol. Chem. 7: 167-180.

L. Marcheterre, G.G. Choudhry, and G.R.B. Webster. 1988. Environmental Photochemistry of Herbicides. Rev. Environ. Contam. Toxicol. 103: 61-126.

B.P. Krawchuk and G.R.B. Webster. 1987. Groundwater Contamination with the Pesticides Chlorothalonil, Carbofuran, and 2,4-D under an Irrigated Canadian Prairie Farm. Verslagen en Mededelingen, Commissie voor Hydrologisch Onderzoek TNO 38: 767-774.

G.G. Choudhry, N.J. Graham, and G.R.B. Webster. 1987. Photochemistry of Halogenated Benzene Derivatives. Part VIII. Photoformation of 2-Methyl-4,5,6,7-tetrachlorobenzoxazole from Pentachlorophenol in Water-Acetonitrile. Can. J. Chem. 65: 2223-2233.

B.D. Prystupa, N.J. Holliday, and G.R.B. Webster. 1987. Molluscicide Efficacy against the Marsh slug Deroceras Laeve (Stylommatophora: Limicidae). J. Econ. Entomol. 80: 936-943.

B.P. Krawchuk and G.R.B. Webster. 1987. Movement of Pesticides to Groundwater in an Irrigated Soil. Water Pollut. Research J. of Canada 22: 129-146.

G.G. Choudhry, J.A. van den Broecke, G.R.B. Webster, and O. Hutzinger. 1987. Environmental Photoincorporations of Polychlorobenzenes into Several Humic Model Monomers. Chemosphere 16: 495-505.

G.G. Choudhry and G.R.B. Webster. 1987. Environmental Photochemistry of Polychlorinated Dibenzofurans (PCDFs) and Dibenzo-p-dioxins (PCDDs): A Review. Toxicol. Environ. Chem. 14: 3-60.

G.G. Choudhry and G.R.B. Webster. 1987. Quantum Yields of Polychlorodibenzo-p-dioxins (PCDDs) in Water-Acetonitrile Mixtures and their Environmental Phototransformation Rates. Amer. Chem. Soc. Adv. Chem. Ser. 327: 61-74.

G.G. Choudhry, G.R.B. Webster, and O. Hutzinger. 1986. Environmentally Significant Photochemistry of Chlorinated Benzenes and their Derivatives in Aquatic Systems. Toxicol. Environ. Chem. 13: 27-83.

G.R.B. Webster, D.H. Muldrew, N.J. Graham, L.P. Sarna, and D.C.G. Muir. 1986. Dissolved Organic Matter Mediated Transport of Chlorinated Dioxins. Chemosphere 15: 1379-1386.

B.F. Rordorf, L.P. Sarna, and G.R.B. Webster. 1986. Vapor Pressure Determination for Several Polychlorodioxins by Two Gas Saturation Methods. Chemosphere 15: 2073-2076.

G.G. Choudhry and G.R.B. Webster. 1986. Photochemical Quantum Yields and Sunlight Half-lives of Polychlorodibenzo-p-dioxins in Aquatic Systems. Chemosphere 15: 1935-1940.

T.C. Kuchnicki and G.R.B. Webster. 1986. A comparison of HPLC analysis of Nitrate in Soils with the Phenoldisulfonic Acid and Hydrazine Sulfate Methods. Can. J. Soil Sci. 66: 151-157.

T.C. Kuchnicki, G.R.B. Webster, and C.M. Cho. 1986. Anaerobic Nitrogen Transformations as Affected by Diclofop-methyl and Hoegrass. Soil Biol. Biochem.

G.G. Choudhry, J.A. van den Broecke, G.R.B. Webster and O. Hutzinger. 1986. Photochemistry of Halogenated Benzene Derivatives. Part VII. Photochemical Interactions of Polychlorobenzenes with some Humic Model Compounds. Environm. Toxicol. Chem. 5: 625-635.

D.C.G. Muir, A. Knoll, A.L. Yarechewski, and G.R.B. Webster. 1986. Bioconcentration and Disposition of 1,3,6,8-Tetrachlorodibenzodioxin and Octachlorodibenzodioxin by Rainbow Trout and Fathead Minnows. Environm. Toxicol. Chem. 5: 261-272.

G.G. Choudhry and G.R.B. Webster. 1985. Photochemistry of Halogenated Benzene Derivatives. Part V. Photolytic Reductive Dechlorination and Isomerization of Tetrachlorobenzenes in Acetonitrile-Water Mixtures. Toxicol. Environ. Chem. 9: 291-308.

G.R.B. Webster, K.J. Friesen, L.P. Sarna, and D.C.G. Muir. 1985. Environmental Fate Modelling of Chlorodioxins: Determination of Physical Constants. Chemosphere 14: 609-622.

D.C.G. Muir, W.K. Marshall, and G.R.B. Webster. 1985. Bioconcentration of PCDDs by Fish: Effects of Molecular Structure and Water Chemistry. Chemosphere 14: 829-834.

L. Marcheterre, G.R.B. Webster, D.C.G. Muir, and N.P. Grift. 1985. Fate of 14C-Octachlorodibenzo-p-dioxin in Artificial Outdoor Ponds. Chemosphere 14: 835-838.

G.G. Choudhry and G.R.B. Webster. 1985. Quantum Yields for the Photodecomposition of Polychlorinated Dibenzo-p-dioxins (PCDDs) in Water-Acetonitrile Solution. Chemosphere 14: 93-896.

K.J. Friesen, L.P. Sarna, and G.R.B. Webster. 1985. Aqueous Solubility of Polychlorinated Dibenzo-p-dioxins Determined by High Pressure Liquid Chromatography. Chemosphere 14: 267 274.

G.G. Choudhry and G.R.B. Webster. 1985. Protocol Guidelines for the Investigation of the Photochemical Fate of Pesticides in Water, Air, and Soils. Residue Rev. 96: 79-136.

B.S. Joia, S.R. Loshchiavo, and G.R.B. Webster, 1985. Cypermethrin and Fenvalerate as Grain Protectants against Tribolium castaneum (Coleoptera: Tenebrionidae) and Cryptolestes ferrugineous (Coleoptera: Cucujidae) at Different Moisture Levels and Temperatures. J. Econ. Entomol. 78: 637-641.

B.S. Joia, G.R.B. Webster, and S.R. Loschiavo. 1985. Cypermethrin and Fenvalerate Residues in Stored Wheat and Milled Fractions. J. Agric. Food Chem. 33: 618-622.

T.C. Kuchnicki, L.P. Sarna, and G.R.B. Webster. 1985. Determination of Nitrate, Nitrite, and Phosphate at 214 nm by Reverse Phase HPLC. J. Liq. Chromatog. 8: 1593-1609.

D.C.G. Muir, A.L. Yarechewski, R.L. Corbet, G.R.B. Webster, and A.E. Smith. 1985. Laboratory and Field Studies on the Fate of 1,3,6,8-Tetrachlorodibenzo-p-dioxin in Soil and Sediments. J. Agric. Food Chem. 33: 518-523.

B.S. Joia, L.P. Sarna, and G.R.B. Webster. 1985. Gas Chromatographic Determination of Cypermethrin and Fenvalerate Residues in Wheat and Milled Fractions. Internat. J. Environ. Anal. Chem. 21: 179-184.

G.G. Choudhry and G.R.B. Webster. 1985. Environmental Photochemistry of Polychlorodibenzo-p-dioxins. Part I. Kinetics and Quantum Yields of Photodegradation of 1,2,3,4,7-Pentachlorodibenzo-p-dioxin and 1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin in Aqueous Acetonitrile. Chemosphere 14: 9-26.

G.G. Choudhry, F.M.W. van der Wielen, G.R.B. Webster, and O. Hutzinger, 1985. Photochemistry of Halogenated Benzene Derivatives. Part VI. Photoreactions of Tetra- and Pentachlorophenols in Water-Acetonitrile Mixtures. Can. J. Chem. 63: 469-475.

L.P. Sarna, P.E. Hodge, and G.R.B. Webster. 1984. Octanol-Water Partition Coefficients of Chlorinated Dioxins and Dibenzofurans by Reversed Phase HPLC using Several C18 Columns. Chemosphere 13: 975-983.

D.A.J. Murray, W.L. Lockhart, and G.R.B. Webster. 1983. Analysis of Water Soluble Fractions of Crude Oils and Petroleum Products by Gas Chromatography. Oil Petrochem. Pollut. 2: 39-46.

D.A. Pchajek, I.N. Morrison, and G.R.B. Webster. 1983. Comparison of Soil Concentrations and Bioactivity of Fall- and Spring-Applied Trifluralin. Can. J. Plant Sci. 63: 1031-1038.

M.R. Samoiloff, J. Bell, D.A. Birkholz, G.R.B. Webster, and E.A. Arnott. 1983. Ecosystem Toxicity Testing in Tobin Lake, Saskatchewan: I. A Combined Bioassay-Chemical Fractionation Scheme for the Determination of Toxic Chemicals in Sediment. Environm. Sci. Technol. 17: 329-334.

B.L. Worobey and G.R.B. Webster. 1983. A Possible Generalized Cleavage Reaction for Mono- and Disubstituted Phenylureas with Perfluoroanhydrides. Internat. J. Environm. Anal. Chem. 14: 99-103.

R.L. Corbet, G.R.B. Webster, and D.C.G. Muir. 1983. Fate of 1,3,6,8-T4CDD in an Outdoor Aquatic System. Chemosphere 12: 523-527.

G.P. Rawn, G.R.B. Webster, and D.C.G. Muir. 1982. Fate of Permethrin in Model Outdoor Ponds. J. Environm. Sci. Health B 17: 463-486.

M.H.K. Abdel-Kader and G.R.B. Webster. 1982. Analysis of Fenitrothion and Metabolites in Stored Wheat. Internat. J. Environm. Anal. Chem. 11: 153-165.

M.H.K. Abdel-Kader, G.R.B. Webster, and S.R. Loschiavo. 1982. Effects of Storage Temperature on Rate of Degradation of Fenitrothion in Stored Wheat. J. Econ. Entomol. 75: 422 424.

B.L. Worobey and G.R.B. Webster. 1982. Pyrolytic Release of 4-Chloroaniline Tightly Complexed with Soil Humic and Whole Soils. J. Agric. Food Chem. 30: 164-169.

B.L. Worobey and G.R.B. Webster. 1982. Hydrolytic Release of Tightly Complexed 4-Chloroaniline from Treated Soil Humic Acids and Whole Soils: An Analytical Method. J. Agric. Food Chem. 30: 161-164.

B.L. Worobey and G.R.B. Webster. 1981. Indigenous 13C-NMR Structural Features of Soil Humic Substances. Nature 292(5823): 526-528.

M.H.K. Kader, G.R.B. Webster, S.R. Loschiavo. and F.L. Watters. 1980. Low Temperature Degradation of Malathion in Stored Wheat. J. Econ. Entomol. 73: 654-656.

G.J. Reimer and G.R.B. Webster. 1980. Loss of Chlorpyrifos in Pond Water: Examination of Results using Three Mathematical Models. J. Environ. Sci. Health B 15: 559-569.

G.P. Rawn, G.R.B. Webster, and D.C.G. Muir. 1980. Bioactivity and Degradation of Permethrin in Artificial Pools. Can. Tech. Rep. Fish. Aquat. Sci. 975: 140-149.

G.W.K. Mensah, F.L. Watters, and G.R.B. Webster. 1979. Insecticide Residues in Milled Fractions of Dry or Tough Wheat Treated with Malathion, Bromophos, Iodophenfos, and Pirimiphos-methyl. J. Econ. Entomol. 72: 728-731.

G.R.B. Webster and B.L. Worobey. 1979. Derivatization and GLC Determination of the Sterically Hindered 2,6-Difluorobenzoic Acid in Pond Water. Internat. J. Environ. Anal. Chem. 6: 197-202.

B.L. Worobey and G.R.B. Webster. 1979. Non-enzymatic Oxidation and Reduction Chemical Model Systems for the Study of Pesticide Transformations. Toxicol. Environ. Chem. Rev. 3: 1-60.

G.W.K. Mensah, F.L. Watters, and G.R.B. Webster. 1979. Translocation of Malathion, Bromophos, and Iodofenphos into Stored grain from Treated Structural Surfaces. J. Econ. Entomol. 72: 385-391.

G.P. Rawn, G.R.B. Webster, and G.M. Findlay. 1979. Effect of Pool Bottom Substrate on Residues and Bioactivity of Chlorpyrifos against Larvae of Culex tarsalis. Can. Ent. 110: 1269 1276.

B.L. Worobey and G.R.B. Webster. 1978. The In Vitro Degradation of Diflubenzuron (Dimilin) during Derivatization with Perfluoroanhydrides. J. Chromatog. 153: 423-431.

G.R.B. Webster, C.F. Shaykewich, S. Kanhai, and G.J. Reimer. 1978. Availability of the Herbicide Trifluralin for Control of Wild Oats as Influenced by Soil Characteristics in Four Manitoba Soils. Can. J. Soil Sci. 58: 397-404.

G.R.B. Webster, L.P. Sarna, and S.R. Macdonald. 1978. Nonbiological Degradation of the Herbicide Metribuzin in Manitoba Soils. Bull. Environ. Contam. Toxicol. 20: 401-408.

B.L. Worobey and G.R.B. Webster. 1977. Gas Liquid Chromatographic Analysis of the Insecticide Diflubenzuron in Water as its Trifluroacetyl Derivative. J. Assoc. Offic. Anal. Chem. 60: 213-217 & 986.

L.P. Sarna, G.J. Howe, G.M. Findlay, and G.R.B. Webster. 1976. Quantitative Gas Chromatographic Analysis of Dimethoate and Several Metabolites in Rape, Quail, and Grasshopper Tissues by Derivatization. J. Agric. Food Chem. 24: 1046-1048.

G.R.B. Webster and G.J. Reimer. 1976. Field Degradation of the Herbicide Metribuzin and its Degradation Products in a Manitoba Sandy Loam Soil. Weed Research 16: 191-196.

G.R.B. Webster and G.J. Reimer. 1976. Cold Storage Degradation of the Herbicide Metribuzin (Sencor) in Field Soil Samples Awaiting Analysis. Pestic. Sci. 7: 292-300.

G.R.B. Webster, S.R.Macdonald, and L.P. Sarna. 1975. Gas-Liquid Chromatographic Determination of Sencor (Metribuzin) and its Major Metabolites and Photoproduct. J. Agric. Food Chem. 23: 74-76.

L.P. Sarna and G.R.B. Webster. 1974. Conductivity Detector for Nitrogen Compounds: Maintenance Program enabling Gas-Liquid Chromatographic Analysis of Trace Residues in Crude Soil Extracts. J. Assoc. Offic. Anal. Chem. 58: 1279-1281.

B.E. Cross and G.R.B. Webster. 1970. New Metabolites of Gibberella fujikuroi. XV. N-Jasmonoyl Isoleucine and N-Dihydrojasmonyl Isoleucine. J. Chem. Soc. (C) 1970: 1839-1842.

B.E. Cross, P.L. Myers, and G.R.B. Webster. 1970. New Metabolites of Giberella fujikuroi. XIV. O-Demethylanhydrofusarubin. J. Chem. Soc. (C) 1970: 930.

T. Money, F.W. Comer, G.R.B. Webster, I.G. Wright, and A.I. Scott. 1967. Pyrone Studies - I. Biogenetic-type Synthesis of Phenolic Compounds. Tetrahedron 23: 3435-3448.

T. Money, I.H. Qureshi, G.R.B. Webster, and A.I. Scott. 1965. Chemistry of Polypyrones. A New Model for Acetogenin Biosynthesis. J. Amer. Chem. Soc. 87: 3004.

Papers Submitted for Publication

F.G. Meier, L.P. Sarna, W.R. Remphrey, and G.R.B. Webster. 1996. Analysis of Mansonones from Ulmus americana L. by HPLC, J. Chromatog. submitted.

S.P. Thomas, R. Sri Ranjan, G.R.B. Webster, and L.P. Sarna. 1996. Vibration Enhanced Solid Phase Microextraction of Hydrocarbons in Water, Environ. Sci. Technol. submitted.



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