منابع مشابه
Historical biogeography of the Isthmus of Panama.
About 3 million years ago (Ma), the Isthmus of Panama joined the Americas, forming a land bridge over which inhabitants of each America invaded the other-the Great American Biotic Interchange. These invasions transformed land ecosystems in South and Middle America. Humans invading from Asia over 12000 years ago killed most mammals over 44 kg, again transforming tropical American ecosystems. As ...
متن کاملHydrology of the Isthmus of Panama.
An examination of the rectangular co6rdinates resulting from the solutions (Table II) shows that nine out of the entire twelve values of Y and all of the values from the small ,, are smaller for the northern than for the southern stars, indicating smaller average parallactic displacement for the northern than for the southern stars. Taking the stars of type B as the best marked example, if we u...
متن کاملFormation of the Isthmus of Panama
The formation of the Isthmus of Panama stands as one of the greatest natural events of the Cenozoic, driving profound biotic transformations on land and in the oceans. Some recent studies suggest that the Isthmus formed many millions of years earlier than the widely recognized age of approximately 3 million years ago (Ma), a result that if true would revolutionize our understanding of environme...
متن کاملThe Relapsing Fever of Panama
from his investigations that the relapsing fever of Panama is distinct from the analogous fever of Africa Europe and Asia, although belonging to the same class. The micro-organism causing | the local relapsing fever belongs to the group Sp. obermeieri, Sp. duttoni, and bp. carten. lhe natural mode of infection has not been definitely established so far. Sarcosporidiosis.?(With Report of a case 111
متن کاملRocky Mountain Spotted Fever, Panama
We describe a fatal pediatric case of Rocky Mountain spotted fever in Panama, the first, to our knowledge, since the 1950s. Diagnosis was established by immunohistochemistry, PCR, and isolation of Rickettsia rickettsii from postmortem tissues. Molecular typing demonstrated strong relatedness of the isolate to strains of R. rickettsii from Central and South America.
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ژورنال
عنوان ژورنال: The Boston Medical and Surgical Journal
سال: 1851
ISSN: 0096-6762,1533-4406
DOI: 10.1056/nejm185112030451801