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Crown condition and nutrient status of red spruce (Picea rubens Sarg.) in West Virginia
1998
Audley, D.E. (Pennsylvania State Univ., University Park, PA (USA). Dept. of Plant Pathology) | Skelly, J.M. | McCormick, L.H. | Jackson, W.A.
Biomass of tomato seedlings exposed to an allelopathic phenolic acid and enriched atmospheric carbon dioxide
1998
Shafer, S.R. (North Carolina State Univ., Raleigh, NC (USA). Dept. of Plant Pathology) | Blum, U. | Horton, S.J. | Hesterberg, D.L.
Nitrification and denitrification estimates in a Louisiana swamp forest soil as assessed BY N-15 isotope dilution and direct gaseous measurements
1998
Delaune, R.D. (Louisiana State Univ., Baton Rouge, LA (USA). Wetland Biogeochemistry Inst.) | Lindau, C.W. | Sulaeman, E. | Jugsujinda, A.
Cyanogen accumulation in environment during processing of cassava (Manihot esculenta Crantz) for starch and sago
1998
Balagopalan, C. (Central Tuber Crops Research Inst., Trivandrum, Kerala (India). Div. of Crop Utilization and Biotechnology) | Rajalakshmy, L.
Multitracer study on absorption of radionuclides in atmosphere-plant model system
1998
Shinonaga, T. (Institute of Physical and Chemical Research, Wako, Saitama (Japan). Nuclear Chemistry Lab.) | Ambe, S.
Arsenic in human and cow's milk: a reflection of environmental pollution
1998
Ulman, C. (Dokuz Eyluel Ueniv., Izmir (Turkey). Faculty of Medicine, Dept. of Biochemistry) | Gezer, S. | Anal, O. | Toere, I.R. | Kirca, U.
Mercury accumulation in transplanted Hypogymnia physodes lichens downwind of Wisconsin chlor-alkali plant
1998
Bennett, J.P. (Wisconsin Dept. of Natural Resources, Madison, WI (USA). Bureau of Air Monitoring) | Makholm, M.M.
Modelling acidification effects on coniferous forest soils
1998
Eriksson, E. (Uppsala Univ. (Sweden). Dept. of Geosciences)
Inhibition of chlorophyll synthesis and enzymes of nitrogen assimilation by selenite in excised maize leaf segments during greening
1998
Jain, M. (Devi Ahilya Univ., Indore (India). School of Biochemistry) | Gadre, R.P.
Phosphine by bio-corrosion of phosphide-rich iron
1998
Glindemann, Dietmar | Eismann, Frank | Bergmann, Armin | Kuschk, Peter | Stottmeister, Ulrich
Phosphine is a toxic agent and part of the phosphorus cycle. A hitherto unknown formation mechanism for phosphine in the environment was investigated. When iron samples containing iron phosphide were incubated in corrosive aquatic media affected by microbial metabolites, phosphine was liberated and measured by gas chromatography. Iron liberates phosphine especially in anoxic aquatic media under the influence of sulfide and an acidic pH. A phosphine-forming mechanism is suggested: Phosphate, an impurity of iron containing minerals, is reduced abioticly to iron phosphide. When iron is exposed to the environment (e.g. as outdoor equipment, scrap, contamination in iron milled food or as iron meteorites) and corrodes, the iron phosphide present in the iron is suspended in the medium and can hydrolyze to phosphine. Phosphine can accumulate to measurable quantities in anoxic microbial media, accelerating corrosion and preserving the phosphine formed from oxidation.
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