Este artículo hace una revisión de literatura científica sobre la importancia comercial los peces ornamentales (PO) en Colombia. Entre principales resultados se encuentra que este mercado continúa siendo actividad intercambio mundial especies exóticas genera grandes ganancias y ha sostenido con el comercio más mil millones cada año. La mayoría PO son extraídos las poblaciones naturales terminan...

The vertebrate habenulae (Hb) is an evolutionary conserved dorsal diencephalic nuclear complex that relays information from limbic and striatal forebrain regions to the ventral midbrain. One key feature of this bilateral nucleus is the presence of left-right differences in size, cytoarchitecture, connectivity, neurochemistry and/or gene expression. In teleosts, habenular asymmetry has been asso...

Bennettitaleans are an extinct group of gymnosperms that among the most iconic plants Earth’s vegetation during Mesozoic Era. The sudden appearance and rise to dominance Bennettitales Triassic remains a mystery. Leaf fossils similar typical bennettitalean foliage occur in late Paleozoic deposits worldwide, but can be identified with certainty only case sufficiently well-preserved show epidermal...

The flora of the Cianowice 2 borehole (c. 20 km NW Cracow, Poland), dominated by cycadophytes (mainly bennettitaleans) and conifers, shows high taxonomic diversity relative to low number specimens. Twenty species were identified in 96 determinable plant fragments found 27 core samples: Cladophlebis sp. (ferns), Pachypteris rhomboidalis (Ettingshausen) Nathorst Ptilozamites cycadea (Berger) Möll...

Il contributo inquadra le caratteristiche dei testi multimodali a partire dal concetto di mediazione testuale, che assume, nel Volume complementare al QCER, un rilievo particolare. Sostiene i neomediali sono prodotti e consumati in ambiente semioticamente ricco fa assumere alle pratiche un’importanza particolare; sottolinea il ruolo fondamentale strumento mediazionale per eccellenza del linguag...