Species belonging to different sections of the genus Polygonum L. were studied micro-morphologically. For this purpose, digital images were obtained from all species and lower taxa belonging to sections Persicaria, Bistorta, Tiniaria and Pleuropterus. Since section Polygonum is much diverse, pollens of three representative species Polygonum luzuloides, P. olivascens and P. setosum were photogra...

The sediments from the Coari lake, a "terra firme" lake sculpted into Plio-Pleistocene deposits, and the Acará lake, a flooding-type lake developed on Quaternary sediments in the floodplain of the mid-Solimões river, in the western Amazônia, Brazil, were studied to investigate the environmental condition of their developing. This study includes mineral composition, geochemistry, Pb isotope, pal...

volume Page 1 PROGRAM 10h00-10h20: E. Pétus, P. Gerrienne & C. Prestianni Physostoma cf. stellatum Holden : a Bashkirian spermatophyte from Bouxharmont (Belgium). 10h20-10h40: C. Prestianni, D. Fokan & P. Gerrienne Record of wildfires in the Famennian of Belgium. 10h40-11h00: P. Gonez & P. Gerrienne Comments on Cooksonia, a basal Eutracheophyte. 11h00-11h20: P. Gerrienne, C. Strullu-Derrien & P...

A fatal accident involving concentrated hydrofluoric acid in a palynological laboratory is described. Similar deaths due to dermal exposure to concentrated hydrofluoric acid have been reported in the literature. It is evident that rigorous control measures including proper personal protective equipment and first aid are of utmost importance in the prevention of death and injury when handling hy...