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Resultados 51-60 de 306
Deposition of sulphur gases from multiple scattered sources in Alberta [Canada].
1981
Walker D.R. | Dick A.C. | Nyborg M.
Various measurements utilizing soils, plants, precipitation and free water surfaces indicate that approximately 7 to 9 kg/ha of sulphate S was deposited annually within an area of 4600 km('2). This area contained or had adjacent to its boundaries 10 S emission sources for which the provincial government had established a combined allowable daily emission of approximately 330 tonne S. At distance of 40 or more km from the emission sources the annual deposition rate had declined to 4 to 6 kg/ha.
Mostrar más [+] Menos [-]Characterization of air pollutants from an activated sludge process.
1981
Scheff P.A. | Holden J.A. | Wadden R.A.
Role of ascorbic acid in the toxicity of pesticides in a fresh water teleost.
1981
Verma S.R. | Tonk I.P. | Gupta A.K. | Dalela R.C.
The effect of ascorbic acid and pesticides (thiotox and malathion) on certain haematological parameters of a fish Saccobranchus fossilis was studied. The sublethal concentrations of thiotox (0.002 mg/l) and of malathion (5.2 mg/l) were tested. Ascorbic acid (2 mg/100 g body weight) was given with food. The alterations in haematological parameters (CT, PT, Hb, RBC, WBC, ESR, PCV, MCH, MCHC, MCV, glucose, protein, total P, Na, K, Mg, Ca, and Cl) were measured after 15 and 30 days exposure. Thiotox and malathion induced significant alteration in blood parameters while ascorbic acid played a protective role.
Mostrar más [+] Menos [-]Activated sludge nickel toxicity studies [Heavy metals in wastewater].
1981
Sujarittanonta S. | Sherrard J.H.
Environmental recovery in a marine ecosystem impacted by a sulfite process pulp mill.
1981
Cross S.F. | Ellis D.V.
Direct measurement of gaseous nitrogen losses from an effluent irrigation area [Santa Barbara County; California].
1981
Ryden J.C. | Lund L.J. | Whaley S.A.
Bioassays [for quantifying water pollution]: procedures and results.
1981
Maciorowski A.F. | Sims J.L. | Little L.W. | Gerrard E.D.
Pulp and paper industry effluent management [Water pollution].
1981
Gove G.W.
Reclamation of wastewater with a soil-turf filter. I. Removal of nitrogen [Reuse of wastewater for irrigation].
1981
Anderson E.L. | Pepper I.L. | Kneebone W.R.
Simulation model for agricultural non-point-source pollution [Water pollution].
1981
Tubbs L.J. | Haith D.A.
