Titlebook: Speciation of Metals in Water, Sediment and Soil Systems; Proceedings of an In Lars Landner Conference proceedings 1987 Springer-Verlag Ber

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Effects of pH on the uptake of copper and cadmium by tubificid worms (oligochaeta) in two differentophic lake with high production..The sediments were contaminated with Cu or Cd before the addition of animals, which after incubation were analysed for Cu and Cd. Total sediment, adsorbed/exchangeable fraction (MgCl.), pore water and overlaying water were analysed for Ca, Mn, Fe, Cu or Cd..In both t

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Aluminium impact on freshwater invertebrates at low pH: A review,ul. Published effect/mechanism descriptions may seem somewhat contradictory, but this can be due to the heterogeneity of "the invertebrate group", as well as the multitude and complexity of occurring Al species, thereby also Al analysis problems. Addition of Al to streams has in some cases increased

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0930-0317 concentration. The introduction of atomic absorption spectrometry has lead to a plethora of scientific papers and reports in which metal concentrations in the environment are only reported as total concentrations. Only recently has the need for improved knowledge on the various forms and bioavailabi

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Conference proceedings 1987 couple chemical analytical techniques to process-related biological problems. The proceedings of the workshop on .The Speciation of Metals in . .Water, Sediment and Soil Systems. held in Sunne, Sweden, comprise these efforts and show aspects for further cooperation between analytical chemists and biologists.

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Effects of pH on the uptake of copper and cadmium by tubificid worms (oligochaeta) in two differentts with the eutrophic sediment showed that a lower pH gave a smaller uptake of metals. The reasons probably are decreasing surface adsorption, decreased uptake directly through the skin and competition of binding sites. The differences in uptake by the worms can also be due to pH-dependent variations in supply of food and activity of the animals.

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Ulrich Förstnerit the SVM-required modeling, it is necessary to transform the multi-labeled dataset into single-labeled ones, which plays a crucial role in the performance. Different transformations applied to the problem may lead to varying accuracy and behavior of SVM over datasets. This paper investigates the p