The common denominator, researchers speculate, may be cumulative exposure to estrogen, a natural hormone that protects the heart and bones but can drive some types of breast cancer.
22.
The image was created by compositing 11 individual ACIS-I exposures for a cumulative exposure time of over one million seconds, in the period 1999-2000, by a team led by Riccardo Giacconi.
23.
Despite the controversy surrounding public release of the Cumulative Exposure Project report, Massachusetts officials say they are benefiting from the detailed exposure data, which EPA has already shared with many states.
24.
Older nylon-shell parkas have a tendency to exhibit a change in color from the original sage green to a shade of magenta due to long-term cumulative exposure to ultraviolet light from the sun.
25.
The radiation dose to the operator during a conventional manual ablation procedure is relatively small, although there is cumulative exposure that becomes an important consideration for operators performing procedures on a daily basis.
26.
Lieberman asked the EPA to conduct a national statistical survey on the use of pesticides in schools to determine if there are risks " posed by pesticides to children through cumulative exposure ."
27.
Gilchrest says, however, that it takes years of cumulative exposure to the sun to cause visible wrinkles, and that there may be other biological mechanisms that explain why once-smooth skin becomes wrinkled with age.
28.
The law also sets new safety standards : For the first time the EPA must consider an individual's cumulative exposure to all pesticides, instead of on a pesticide by pesticide basis, when making decisions about their use.
29.
Statistically significant excesses in lung cancer deaths were present after cumulative exposures of less than 50 WLM . The size of the radon-related increase in lung cancer risk varied by more than an order of magnitude between the different studies.
30.
In Vermont, where the state has been monitoring concentrations of many toxic air emissions for five years, state officials said the EPA report remains basically accurate today, and the state has detected one elevated chemical, methylene chloride, that the Cumulative Exposure Project did not.
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