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Microcystins and nodularin are potent hepatotoxins produced by fresh and seawater cyanobacteria. The persistence of three hepatotoxins - microcystin-LR, microcystin-RR and nodularin - was investigated in sterile BG-11 medium of different salinity and in water collected from the Gulf of Gdansk. After 21 days of incubation at 17 š 1oC and constant illumination of about 40 žmol photon m-2 s-1 the concentration...
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