The earliest reports of high incidence of oesophageal cancer (OC) in the northern parts of Iran date back to the early 1970s. A population-based cancer registry was established in 1969 as a joint effort between Tehran University and the International Agency for Research on Cancer (IARC). This registry confirmed the high incidence of OC in the eastern portion of the Caspian Sea littoral, in the ...

Contingent choice surveys, in which respondents rate or rank alternative scenarios describing potential futures composed of varying levels of several different attributes, can help national park managers by identifying the preferences of visitors and also the nonuse values generated by park attributes. Many alternative combinations of park attributes can be explored efficiently, helping park ma...

The study was conducted with the objective of mapping landscape cover of Nechsar National park in Ethiopia to produce spatially accurate and timely information on land use and changing pattern. Monitoring provides the planners and decision-makers with required information about the current state of its development and the nature of changes that have occurred. Remote sensing and Geographical Inf...

birds constitute the important elements of most ecosystems of the world. the objective of this study was to survey and identify birds of boujagh national park. for this reason the park divided into 7 parts and during 24 months, between autumn 1383 and late summer of 1385, the park has been surveyed. the results show that 234 species have been identified (about %46.4 of all bird species througho...

Yellowstone National Park plays host to numerous microbiological research projects — officially 23, according to the 1996 Investigators' Annual Reports. However, once categories such as aquatic ecology, the study of brucellosis and other wildlife diseases, environmental education, geochemistry and geothermal systems, and vegetation are included, the total came to at least 35 in 1996. Research p...

Aquificales are metabolically versatile chemolithoautotrophic thermophilic bacteria. This group is widespread in both deep-sea and terrestrial hydrothermal systems. In Yellowstone National Park, they were first described in early descriptions of the biology of the park, and later captured the attention of many microbiologists including Brock, Stahl, Pace, and others. There are four genera curre...