Antarctica plays a central role in regulating global climatic and oceanographic patterns is an integral part of climate change discussions. The functioning Antarctica's terrestrial ecosystems dominated by poikilohydric cryptogams such as lichens, bryophytes, eukaryotic algae, cyanobacteria there are only two native species vascular plants. vegetation highly adapted to the region's extreme condi...

Traffic-related air pollution is one of the most relevant environmental problems in urban areas. Several cryptogams (i.e., lichens and mosses) vascular species have been employed to monitor since they allow assessment quality a large number sampling sites simultaneously at low cost. In cities, vehicle emissions are frequently major source along with residential energy (for cooking heating), ind...

Amber is renowned for the exceptional preservation state of its inclusions, allowing detailed morphological analysis and providing relevant environmental, palaeoecological, geographical, geological information. deposits are predominantly known from North America, Europe, Asia, considered to be rare on continents that formed Gondwana. The recent discovery fossiliferous amber in Ethiopia, therefo...

o bjective: to determine the etiology, signs and symptoms, angiography indications and angiography findings in patients with limb penetrating injuries suspected to have arterial injury. m e thods: this was a cross-sectional study being performed in imam reza hospital affiliated with mashhad university of medical sciences, iran between september 2011 and march 2013. we included those patients wi...

Selaginella (Selaginellales, Selaginellaceae) is the most speciose genus of lycophytes and, with approximately 750 recognized present-day species, also one largest genera vascular plants. However, evolutionary history this species richness remains largely unresolved. Recent research suggests that was diverse already in mid-Cretaceous and shows S. subg. Stachygynandrum dates back at least to inc...