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Radon is responsible for the majority of public exposure to ionizing radiation. It is often the single largest contributor to an individual's background radiation dose, and is the most variable from location to location. Radon gas from natural sources can accumulate in buildings, especially in confined areas such as attics and basements.
Radon is found in some petroleum. Because radon has a similar pressure and temperature curve to propane, and oil refineries separate petrochemicals based on their boiling points, the piping carrying freshly separated propane in oil refineries can become contaminated because of decaying radon and its products. [86]
Radon, a byproduct of naturally decaying uranium, is estimated to cause thousands of deaths each year nationwide. Here's how to protect yourself.
Parasitic infections from freshwater fish are a serious problem in some parts of the world, particularly Southeast Asia. Fish that spend part of their life cycle in salt water, like salmon, can also be a problem. A study in Seattle, Washington showed that 100% of wild salmon had roundworm larvae capable of infecting people.
These fish can display homing behaviour and are normally found no deeper than the lower limit for the growth of green algae, around 20 metres (66 ft). They are predatory fish and the major part of their diet is crustaceans but they will eat polychaetes, gastropods and small fish, they have also been recorded consuming algae. The five-bearded ...
Friedrich Ernst Dorn (27 July 1848 – 16 December 1916) was a German physicist who was the first to discover that a radioactive substance, later named radon, is emitted from radium. Life and work [ edit ]
A 2020 study found the number of fasting days, determined by the number of ice-free days every summer, directly affected cub survival. The new study, authors said, took that a step further and ...
[7] [8] Individual fish can weigh 9 kg (20 lb) or more with record-sized fish having been taken by anglers in Northern Canada, where it is known as iqaluk or tariungmiutaq in Inuktitut. Generally, whole market-sized fish are between 1 and 2.5 kg (2 lb 3 oz and 5 lb 8 oz). [9] Male and female Arctic char are the same size. [4] [5] [6]