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Resultados 271-280 de 314
Water balance in the spruce mountain ecosystem
1999
Tuzinsky, L. (Technicka Univ., Zvolen (Czech Republic). Lesnicka Fakulta)
Torrents in the air polluted area of Beskids
1999
Jarabac, M. (Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Jiloviste-Strnady (Czech Republic) | Gasek, V.
Reduction of nutrient losses from forest soil due to growth of grasses on immission barrens
1999
Fiala, K. | Tuma, I. | Holub, P. (Akademie Ved, Ceske Budejovice (Czech Republic). Botanicky Ustav)
Nitrification in Norway spruce forest soil in Beskids
1999
Novak, F. (Akademie Ved, Ceske Budejovice (Czech Republic). Ustav Pudni Biologie)
Differences between sun and shade foliage assimilation based on their specific leaf area
1999
Urban, O. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny)
The influence of nitrogen fertilization on assimilatory apparatus and growth increment of spruce growing in different densities
1999
Pokorny, R. | Salanska, P. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny)
Proceedings of National Seminar on Environmental Pollution and Water Resources Management | Environmental pollution and water resources management
1999
Chand, Satish | Tiwari, S. N. | Prasad, S. C.
Behavior of EPN with mice to explain the sudden death of Bombycille
1999
Yamamoto, A. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Tsukioka, T. | Yoshida, T. | Sato, M. | Maruyama, S.
Determination of aliphatic lower amines in environmental samples
1999
Tsukioka, T. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
A micro analytical method has been established for aliphatic lower primary and secondary amines in environmental water and sediment. Amines were distilled and allowed to react with benzenesulfonyl chloride under an alkaline condition. The derivatized compounds were extracted with benzene under an acidic condition and subjected to a determination by GC/MS. This method has been successfully applied for a simultaneous determination of primary and secondary amines with recovery over 80%, except for methylamine, and C.V. below 7%, except for methyl and dimethyl amines; moreover, the detection limit were 0.1 micro g/L for all of the amines determinated. This method is excelent also in sensitivity, is sufficiently applicable to environmental samples.
Mostrar más [+] Menos [-]Survey of chemical substances in freshwater fish
1999
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Miyagawa, A. | Tsukioka, T. | Sato, M.
