Identifying γ-ray sources in the Galaxy is hampered by their poor localization, source confusion, and the large variety of potential emitters. Neutron stars and their environment offer various ways to power γ-ray sources: pulsed emission from the open magnetosphere and unpulsed γ rays from the wind nebula and from the cosmic rays accelerated in the supernova remnant. While the latter still awai...

I N A PREVIOUS publication,’ two patients were described with hypochromic, microcytic anemia refractory to treatment with usual hematopoietic agents but responsive to the oral administration of crude liver extract ( Liquid Extract of Liver, Valentine ) . Other findings in these patients included erythroblastic hyperplasia of hone marrow and markedly elevated serum iron concentration with almost...

Chrysichthys nigrodigitatus and C. auratus are important, highly valued and threatened freshwater species. To contribute with their ecological knowledge, the condition factor and diet of these two congeneric species were studied between April 2005 and April 2006. Food items of fish were evaluated by occurrence and numerical abundance methods, and the possible changes among sexes, seasons and si...