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[Evaluation of air pollution exposition: needs in epidemiology and for executives] | Evaluer les expositions: les besoins des epidemiologistes et des decideurs
1999
Zmirou, D. (Universite de Grenoble 1, La Tronche (France). UFR de Medecine, Laboratoire de Sante)
Factors Affecting Microbial Degradation of Polycyclic Aromatic Hydrocarbon Phenanthrene in the Caribbean Coastal Water Full text
1999
Zaidi, B.R. | Imam, S.H.
Studies were conducted to assess factors that may influence the rate and extent of biodegradation of polyaromatic hydrocarbons (PAHs) in waters of Guayanilla Bay (latitude, 18°N; longitude, 66.45°W) Puerto Rico. Phenanthrene was used as a model PAHs compound. Both the rate and extent of phenanthrene degradation by natural microbial flora present in seawater samples from Guayanilla Bay were quite slow. Addition of KNO3 as a source of inorganic nitrogen (N) resulted in a 10-fold increase in the rate of phenanthrene degradation within a 125 h period, whereas, addition of K2HPO4 as a source of inorganic nutrient phosphorus (P) had no effect. Phenanthrene degradation was strongly inhibited when seawater pH was adjusted to 10.0. Phenanthrene in seawater samples degraded rapidly when first pretreated with hydrogen peroxide (H2O2) and then inoculated with a known indigenous phenanthrene degrading bacterium, Alteromonas sp. Pretreatment of phenanthrene with Triton-x-100 had little or no effect on its degradation by the same bacteria, whereas, degradation in samples preheated at 60°C was somewhat inhibited.
Show more [+] Less [-]Storm water pollution control
1999
Dodson, Roy D.
Chemical and spectroscopic analysis of organic matter transformations during composting of pig manure
1999
Hsu JennHung | Lo ShangLien (Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Taipei (Taiwan))
The effect of liming and correction fertilization on heavy metal and macronutrient concentrations in soil solution in heavy-metal polluted scots pine stands
1999
Derome, J. | Saarsalmi, A. (Rovaniemi Research Station, Finnish Forest Research Institute, P.O. Box 16, FIN-96301 Rovaniemi (Finland))
Evaluation of hydroxyapatite as a metal immobilizing soil additive for the remediation of polluted soils. Part 1. Influence of hydroxyapatite on metal exchangeability in soil, plant growth and plant metal accumulation
1999
Boisson, J. | Ruttens, A. | Mench, M. | Vangronsveld, J. (INRA Bordeaux Aquitaine Research Center, Agronomy Unit, BP 81, F-33883 Villenave d'Ornon (France))
A long-term soil leaching column experiment investigating the effect of variable sulphate loads on soil solution and soil drainage chemistry
1999
Hodson, M.E. | Langan, S.J. (Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB15 8QH (United Kingdom))
Variation in seasonal precipitation chemistry with altitude in the northern Pennines, UK
1999
Taylor, K. | Woof, C. | Ineson, P. | Scott, W.A. | Rigg, E. | Tipping, E. (Soil Section, Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU (United Kingdom))
Pesticide residue assessment in three selected agricultural production systems in the Choluteca River Basin of Honduras
1999
Kammerbauer, J. | Moncada, J. (Pan-American Agricultural School, Zamorano, Apartado Postal 93, Tegucigalpa (Honduras))
The distribution of 14C-TNT in different biochemical compartments of the monocotyledonous Triticum aestivum
1999
Sens, C. | Scheidemann, P. | Werner, D. (Fachgebiet Zellbiologie und Angewandte Botanik der Philipps Universitat Marburg, D-35032 Marburg (Germany))
