Response of Aquatic Communities from a Vermont Stream to Environmentally Realistic Atrazine Exposure in Laboratory Microcosms (pp. 410-419)
B. Gruessner, M.C. Watzin

Effects of Chronic Pesticide Stress on Wildlife Populations in Complex Landscapes: Processes at Multiple Scales (pp. 420-426)
B.A. Maurer, R.D. Holt

Evaluating Risk Predictions at Population and Community Levels in Pesticide Registration - Hypotheses to be Tested (pp. 427-431)
L.A. Kapustka, B.A. Williams, A. Fairbrother

The Layered and Historical Nature of Ecological Systems and the Risk Assessment of Pesticides (pp. 432-440)
W.G. Landis, R.A. Matthews, G.B. Matthews

Effects of Rodeo® and Garlon3A® on Nontarget Wetland Species in Central Washington (pp. 441-451)
S. Gardner-Arroll, C.E. Grue

Biomonitoring with Sentinel Plants to Assess Exposure of Nontarget Crops to Atmospheric Deposition of Herbicide Residues (pp. 452-459)
A.S. Felsot, M.A. Bhatti, G.I. Mink, G. Reisenauer

Interactions of Cd and Cu in Anaerobic Estuarine Sediments: II. Bioavailability, Body Burdens and Respiration Effects as Related to Geochemical Partitioning (pp. 466-471)
J.H. Rule, R.W. Alden, III

Biodegradation of Triethanolamine (pp. 472-480)
R.J. West, S.J. Gonsior

Persistence of Herbicide Residues in Gammarus lacustris (Crustacea: Amphipoda) in Prairie Wetlands (pp. 481-488)
M.T. Arts, J.V. Headley, K.M. Peru

Uptake of Chlorobenzenes by Tissues of the Soybean Plant (pp. 489-494)
D.D. Tam, W.-Y. Shiu, K. Qiang, D. Mackay

Monitoring the Effects of Five Non-Herbicidal Pesticide Chemicals on Terrestrial Plants Using Chlorophyll Fluorescence (pp. 495-500)
B.W. Krugh, D. Miles

Comparison of the Response of Bacterial Luminescence and Mito- chondrial Respiration to the Effluent of an Oil Refinery - Short Communication (pp. 501-502)
M. Riisberg, E. Bratlie, J. Stenersen

Degradation of 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione in Aqueous Aerobic Media (pp. 503-513)
P. Subramanian, L. Teesch, P.S. Thorne

Effects of Grasshopper Control Insectides on Survival and Brain Acetylcholinesterase of Pheasant (Phasianus colchicus) Chicks (pp. 518-524)
P.A. Martin, D.L. Johnson, D.J. Forsyth

Synergy Between Deltamethrin and Prochloraz in Bees: Modeling Approach (pp. 525-534)
K. Chalvet-Monfray, L.P. Belzunces, M.E. Colin, C. Fléché, P. Sabatier

Field Evaluation of the EPA (Kenaga) Nomogram, A Method for Estimating Wildlife Exposure to Pesticide Resiudes on Plants (pp. 535-543)
T.G. Pfleeger, A. Fong, R. Hayes, H. Ratsch, C. Wickliff

Monitoring Exposure of Nestling Songbirds to Agricultural Application of an Organophosphorus Insecticide Using Cholinesterase Activity (pp. 544-552)
P.F. McInnes, D.E. Andersen, D.J. Hoff, M.J. Hooper, L.L. Kinkel

Reproductive Success, Developmental Anomalies and Environmental Contaminants in Double-Crested Cormorants (Phalacrocorax auritus) (pp. 553-559)
J.M. Larson, W.H. Karasov, L. Sileo, K.L. Stromborg, B.A. Hanbidge, J.P. Giesy, P.D. Jones, D.E. Tillitt, D.A. Verbrugge

Neogastropod Imposex for Monitoring Recovery from Marine TBT Contamination (pp. 560-567)
M. Tester, D.V. Ellis, J.A.J. Thompson

Modulation of Cupric Ion Activity by pH and Fulvic Acid as Determinants of Toxicity in Xenopus laevis Embryos and Larvae (pp. 568-573)
D.B. Buchwalter, G. Linder, Lawrence R. Curtis

In Situ Toxicity Evaluations of Turbidity and Photo-Induction of Polycyclic Aromatic Hydrocarbons (pp. 574-581)
D.S. Ireland, G.A. Burton, Jr., G. G. Hess

Rapid Assessment of Induced Cytochrome P4501A (CYP1A) Protein and Catalytic Activity in Fish Hepatoma Cells Grown in Multiwell Plates: Response to TCDD, TCDF, and Two Planar PCBs (pp. 582-591)
M.E. Hahn, B.L. Woodward, J.J. Stegeman, S.W. Kennedy

An ELISA Assay for Cytochrome P4501A in Fish Liver Cells (pp. 592-596)
B.J. Brüschweiler, F.E. Würgler, K. Fent

The Community Conditioning Hypothesis and Its Application to Environmental Toxicology (pp. 597-603)
R.A. Matthews, W.G. Landis, G.B. Matthews

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