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Numerous studies and reports indicate that the indoor radon inhalation by humans has to be considered as the main source of radiological hazard and probably the second most important cause of lung cancer after that of smoking. For this purpose, 50 Lexan track detectors were exposed in the air indoormore » as well as outdoor during two months June and July within the central region of Curitiba and Campo Largo Parana St. Since this period of the year is usually rather cold in the South of Brazil , exposition time was chosen to prevent possible saturation of alpha tracks.
The second step of measurements was performed during the months of November, December and January, when 50 Lexan track detectors were exposed in the air indoor and outdoor within the same urban area. Achieved results are being compared with other experimental data.
During the last decades, many countries have put considerable efforts into direct measurements and monitoring of Rn and its progeny exposure, as well as Rn concentration mapping. Present measurements were performed with an aim to study possible correlation between used construction materials and Rn indoor concentration levels.
For this purpose, 50 Lexan track detectors were exposed in the air indoor as well as outdoor during two months June and July within the central region of Curitiba and Campo Largo Parana St. Walkability and physical activity: findings from Curitiba , Brazil. Evidence from developing countries is limited on how income level for a given neighborhood is related to physical activity among its residents.
The goal of the study was to examine the association between walkability and physical activity outcomes, and the effect of income on the relationship between walkability and physical activity in adults. Data were collected in in 32 census tracts selected to vary in income and walkability, as measured by GIS. Participants were individuals aged years The International Physical Activity Questionnaire was used to measure physical activity.