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Full-Text Articles in Medicine and Health Sciences
Intercomparison Of Retrospective Radon Detectors, R. William Field, Daniel J. Steck, Mary Ann Parkhurst, Judy A. Mahaffey, Michael C.R. Alavanja
Intercomparison Of Retrospective Radon Detectors, R. William Field, Daniel J. Steck, Mary Ann Parkhurst, Judy A. Mahaffey, Michael C.R. Alavanja
Physics Faculty Publications
We performed both a laboratory and a field intercomparison of two novel glass-based retrospective radon detectors previously used in major radon case-control studies performed in Missouri and Iowa. The new detectors estimate retrospective residential radon exposure from the accumulation of a long-lived radon decay product, 210Pb, in glass. The detectors use track registration material in direct contact with glass surfaces to measure the α-emission of a 210Pb-decay product, 210Po. The detector's track density generation rate (tracks per square centimeter per hour) is proportional to the surface α-activity. In the absence of other strong sources of α-emission in …
Exposure To Atmospheric Radon, Daniel J. Steck, R. William Field, Charles F. Lynch
Exposure To Atmospheric Radon, Daniel J. Steck, R. William Field, Charles F. Lynch
Physics Faculty Publications
We measured radon (222Rn) concentrations in Iowa and Minnesota and found that unusually high annual average radon concentrations occur outdoors in portions of central North America. In some areas, outdoor concentrations exceed the national average indoor radon concentration. The general spatial patterns of outdoor radon and indoor radon are similar to the spatial distribution of radon progeny in the soil. Outdoor radon exposure in this region can be a substantial fraction of an individual's total radon exposure and is highly variable across the population. Estimated lifetime effective dose equivalents for the women participants in a radon-related lung cancer …
An Endophytic Fungus As A Source Of New Antifungal Compounds, Lisa Marie Jungbauer
An Endophytic Fungus As A Source Of New Antifungal Compounds, Lisa Marie Jungbauer
Honors Theses, 1963-2015
Medical advances in society such as organ transplants, prolonged chemotherapy, and those that lengthen the lives of AIDS patients and the elderly increase the number of immunocompromised individuals(1). When the immune system is compromised, opportunistic fungi can flourish and become fatal. Current antifungal treatments are limited and often toxic(2,3). In addition, strains of fungi resistant to available antifungals are emerging(4,5). Fungi were selected as the source of potential new antifungal agents because fungal antagonism has been reported in most fungal ecosystems(6). Endophytic fungi, which inhabit the spaces between plant cells, are known producers of natural products and that assist plants …