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Vaitomaa, J., Rapala, J., Seitsonen, J. and Sivonen, K. (1998) Factors Influencing Growth and Toxin Production of Cyanobacteria: Field, Mesocosm and Laboratory Experiments. In: Carmichael, W.W. and Paerl, H.W., Eds, Abstracts, 4th International Conference on Toxic Cyanobacteria, Beaufort, 51.

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• TITLE: New Records of Microcystins in Some Bulgarian Water Bodies of Health and Conservational Importance

  AUTHORS: Vera Pavlova, Maya Stoyneva, Vesela Georgieva, Desislav Donchev, Lisa Spoof, Jussi Meriluoto, Zlatka Bratanova, Irina Karadjova

  KEYWORDS: Cyanobacteria, Cyanotoxins, Microcystins

  JOURNAL NAME: Journal of Water Resource and Protection, Vol.6 No.5, April 21, 2014

  ABSTRACT: Microcystins cause acute hepatotoxicity and chronic liver tumor promotion. This study presents the results of HPLC DAD analyses and their LC-MS confirmation of samples from five Bulgarian water bodies (reservoirs Stoudena, Pchelina, Bistritsa and lakes Dourankoulak, Vaya). The total concentration of microcystins in water samples ranged from 0.1 to 26.5 μg/l. The amount of microcystins in the biomasses ranged from 11.4 to 49.6 μg/g (d.w.). The high percent of positive samples in which the most toxic microcystin-LR is recorded, can serve as a strong alarm for the necessity of a serious study and relevant discussion of the problem with responsible authorities at national level.