A model describing transport of I in the environment was developed by SENES Oak Ridge, Inc., for assessment of radiation doses and excess lifetime risk from I atmospheric releases from Oak Ridge Reservation in Oak Ridge, Tennessee, and from Idaho National Engineering and Environmental Laboratory in southeast Idaho. This paper describes the results of an exercise designed to test the reliability...

The health risk resulting from benzene exposure in petroleum refineries was calculated using data from the scientific literature from various countries throughout the world. The exposure data was collated into four scenarios from petroleum refinery environments and plotted as cumulative probability distributions (CPD) plots. Health risk was evaluated for each scenario using the Hazard Quotient ...

R isk stratification is essential for designing efficacious and cost effective colon cancer screening programmes. One of the most important risk factors for colorectal cancers (CRC) is an inherited predisposition, implicated in 20% of all cases. The spectrum of genetic susceptibility ranges from the low penetrance mutations that modestly increase the colon cancer risk (for example, I 1307K) to ...

OBJECTIVE To evaluate the effect of dietary folate intake on the relation between alcohol consumption and breast cancer risk. DESIGN Prospective cohort study. SETTING Melbourne, Australia. PARTICIPANTS 17,447 Anglo-Australian women resident in Melbourne, aged 40-69 years at recruitment in 1990-4, and followed up until 31 December 2003. MAIN OUTCOME MEASURE Invasive breast cancers diagno...

naturally occurring radionuclide of terrestrial origin (also called primordial radionuclide) are present in various degrees in all media in the environment, including the human body itself. their concentrations in environment decrease continually by decaying. the main objective of this study is to evaluate the radioactivity levels and health risks due to terrestrial radionuclide in soil of yalo...

In this paper, we present a useful Monte Carlo (MC)-based methodology that can be utilized to calculate the absorbed dose and initial levels of complex DNA damage (such as double strand breaks-DSBs) in case an environmental ionizing radiation (IR) exposure incident (REI) i.e., nuclear accident. Our objective is assess doses by isolating only one component total released environment after REI wi...

Genealogies for the Mexican-American city of Laredo, Texas, have been assembled by computer from individual civil and church records of birth, marriage, and death. Documentation is available on vital events in the lives of over 300,000 individuals, about 80% of the city population from 1870-1981. These data were collected to determine the degree to which death from cancer is more clustered in f...

Recent epidemiological studies have suggested that radiation exposure from pediatric CT scanning is associated with small excess cancer risks. However, the majority of CT scans are performed on adults, and most radiation-induced cancers appear during middle or old age, in the same age range as background cancers. Consequently, a logical next step is to investigate the effects of CT scanning in ...

It is needless for occupational health doctors and scientists to mention about the importance of risk assessment of hazardous substances used in workplaces. Since the US Supreme Court sentenced the " benzene verdict " requiring better ground for the occupational exposure limit (OEL) for benzene in 1980, the research and scientific knowledge on risk assessment for hazardous substances have been ...