Effect of Oxygen Status on Pesticide Transformation and Sorption in Undisturbed Soil and Lake Sediment (pp. 608-616)
J.P.M. Vink, S.E.A.T.M. van der Zee

A Multi-Laboratory Evaluation of Analytical Methods for Estimating Bioconcentratable Contaminants in Effluents, Tissues, and Sediments (pp. 617-624)
D.C.L. Wong, R. van Compernolle, E.Y. Chai, R.D. Fitzpatrick, W.J. Bover

Trichlorethylene and Tetrachloroethylene Reduction in a Batch Metallic Iron Water-Vapor System (pp. 625-630)
T.J. Campbell, D.R. Burris, A.L. Roberts, J.R. Wells

Effects of Bacterial Inoculation and Nonionic Surfactants on Degradation of Polycyclic Aromatic Hydrocarbons in Soil (pp. 631-637)
T. Madsen, P. Kristensen

Magnitude and Persistence of Herbicide Residues in Farm Dugouts and Ponds in the Canadian Prairies (pp. 638-643)
R. Grover, D.T. Waite, A.J. Cessna,W. Nicholaichuk, D.G. Irvine, L.A. Kerr, K. Best

Fate and Movement of Endosulfan Under Field Conditions (pp. 644-649)
Survival and Ecological Effects of Genetically Engineered Erwinia carotovora in Soil and Aquatic Microcosms (pp. 650-657)
S. Palmer, V. Scanferlato, D.R. Orvos, G.H. Lacy, J. C. Cairns, Jr.

Acute Toxicity and Aqueous Solubility of Some Condensed Thiophenes and Their Microbial Metabolites (658-665)
D.T. Seymour, A.G. Verbeek, S.E. Hrudey, P.M. Fedorak

Polynuclear Aromatic Hydrocarbon Metabolism in Soils: Relationship to soil Characteristics and Preexposure (pp. 666-675)
L.M. Charmichael, F.K. Pfaender

Effects of Sublethal Copper Exposure on Muscle Energy Metabolism of Common Carp, Measured by ¹⁴ P-Nuclear Magnetic Resonance Spectroscopy (pp. 676-684)
G. De Boeck, R. Borger, A. Van der Linden, R. Blust

Altered Locomotory Behavior in Woodlice (Onisus asellus L.) Collected at a Polluted Site (pp. 685-690)
F.F. Sørensen, J.M. Weeks, E. Baatrup

Genetic Differentiation Among Laboratory Populations of Hyalella azteca: Implications for Toxicology (pp. 691-695)
Y. Duan, S.I. Guttman, J.T. Oris

Acute Toxicity and Behavioral Effects of Chlorpyrifos, Permethrin, Phenol, Strychnine, and 2,3-Dintrophenol to 30-Day-Old Japanese Medaka (Oryzias latipes) (pp. 696-704)
P.J. Rice, C.D. Drews, T.M. Klubertanz, J.R. Coats

Resistance to Malathion in Heat-shocked Daphnia magna (pp. 705-712)
Polychlorinated-Dibenzo-p-Dioxins, Dibenzofurans, Biphenyls and 2,3,7,8-Tetra chlorodibenzop-Dioxins Equivalents in Fishes from Saginaw Bay, Michigan (pp. 713-724)
J.P. Giesy, D.J. Jude, D.E. Tillitt, R.W. Gale, J.C. Meadows, J.L. Zajieck, P.H. Peterman, D.A.Verbrugge, J.T. Sanderson, T.R. Schwartz, M.L. Tuchman

The Relative Sensitivity of Chicken Embryos to Yolk or Aircell-Injected 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (pp. 725-732)
D. S. Henshel, B. Hehn, R. Wagey, M. Vo, J.D. Steeves

Heavy Metal Accumulation in Sediment and Freshwater Fish in U.S. Arctic Lakes (pp. 733-741)
S.M. Allen-Gil, C.P. Gubala, D.H. Landers, B.K. Lasorsa, E.A. Crecelius, L.R. Curtis

Accumulation and Toxicokenetics of Fluoranthene in Sediment Bioassays with Freshwater Amphipods (pp. 742-753)
G.A. Harkey, S. Kane Driscoll, P.F. Landrum

Accumulation and Toxicokinetics of Fluoranthene in Water-only Exposures with Freshwater Amphipods (pp. 754-761)
S. Kane Driscoll, P.F. Landrum, E. Tigue

Effect of Feeding in 30-Day Bioaccumulation Assays Using Hyalella azteca in Fluoranthene-Dosed Sediment (pp. 762-769)
G.A. Harkey, S. Kane Driscoll, P.F. Landrum

Calcium Fluxes in Juvenile Tilapia, Orechomis mossambicus, Exposed to Sublethal Waterborne Cadmium, Copper or Mixtures of These Metals (pp. 770-774)
S.M.G.J. Pelgrom, R.A.C. Lock, P.H.M. Balm, S.E. Wendelaar Bonga

Sediment Contaminants and Biological Effects in Southern California: Use of a Multivariate Statistical Approach to Assess Biological Impact (pp. 775-784)
C.L. Maxon, A.M. Barnett, D.R. Diener

Effects of Alachlor on an Algal Community from a Midwestern Agricultural Stream (pp. 785-793)
R.L. Spawn, K. D. Hoagland, B.D. Siegfried

Estimating Low Toxic Effects (pp. 794-801)
D.R.J. Moore, P-Y Caux

A Spreadsheet Program for Estimating Low Toxic Effects (pp. 802-806)
P-Y Caux, D.R.J. Moore

Study of Heavy Metals in Macrophyte Algae Using Energy-Dispersive X-Ray Fluorescence (pp. 807-812)
M.L. Carvalho, J. G. Ferreira, P. Amorim, M.I.M. Marques, M.T. Ramos

Effect of Acclimation Period on the Relationship of Acute Copper Toxicity of Hardness for Fathead Minnows - Short Communication (pp. 813-815)
R.J. Erickson, C.F. Kleiner, J.T. Fiandt, T.L. Highland

High Induction of Cytochrome P4501A Activity without changes in Retinoid and Thyroid Hormone Levels in Flounder (Platichthys flesus) Exposed to 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (pp. 816-823)
H.T. Besselink, E. van Saten, W. Vorstman, A.D. Vethaak, J.H. Koeman, A. Brouwer

Precision and Sensitivity of A Seven-day Growth and Survival Toxicity Test using the West Coast Marine Mysid Crustacean Holmesimysis costata (pp. 824-834)
J.W. Hunt, B.S. Anderson, S.L. Turpen, M.A. Englund, W. Piekarski

Comparative Metabolism of Benzo[a]pyrene by Liver Microsomes of Channel Catfish and Brown Bullhead - Short Communication (pp. 835-836)
Z-X Yan, S. Kumar, H.C. Sikka

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