No abstract

This study aimed at assessing the toxic effects of industrial effluents using duckweed (Lemna minor L.) plants as a test system. Growth inhibition test according to standardized protocol (ISO 20079) was performed. The suitability of the Comet assay (indicates DNA damage) and certain parameters such as peroxidase activity and lipid peroxidation level, as biomarkers for environmental monitoring was evaluated. The water samples were collected monthly over a 3-month period from the stream near the industrial estate of Savski Marof, Croatia. All samples caused inhibition of growth rates based on frond number and biomass as well as decrease of chlorophylls content. In contrast, peroxidase activity, malondialdehyde content and tail extent moment (measure of DNA strand breaks) markedly increased. Obtained data demonstrate the relevance of duckweed as sensitive indicators of water quality as well as the significance of selected biological parameters in the reliable assessment of phyto- and genotoxic potential of complex wastewaters.

No abstract

By partial oxidation of a solution of (Ta6Cl12)Cl2·6EtOH in butyronitrile, crystals of the title compound are obtained. The structure consists of mixed-oxidation state ions:  [Ta6Cl12]2+ as cations [Ta6Cl12(PrCN)6]2+, and [Ta6Cl12]4+ as [(Ta6Cl12)Cl6]2- anions. Bond distances and IR spectra confirm the different oxidation states of the [Ta6Cl12] cluster cores.