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Bioconcentration. In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. [1][2] There are several ways in which to measure and assess bioaccumulation and bioconcentration. These include: octanol-water partition coefficients (K OW), bioconcentration factors (BCF ...
The production of BCF and similar chlorofluorocarbons has been banned in most countries since January 1, 1994 as part of the Montreal Protocol on ozone depleting substances. . Halon 1211 is also a potent greenhouse gas with a 100-year global warming potential 2,070 times that of carbon dioxide and an atmospheric lifetime of 16.0 yea
A four-minute mile is the completion of a mile run (1.6 km) in four minutes or less. It translates to a speed of 15 miles per hour (24 km/h). [1] It is a standard of professional middle distance runners in several cultures. The first four-minute mile is usually attributed to the English athlete Roger Bannister, who ran it in 1954 at age 25, in ...
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800 m. Sir Roger Gilbert Bannister CH CBE FRCP (23 March 1929 – 3 March 2018) was an English neurologist and middle-distance athlete who ran the first sub- 4-minute mile. At the 1952 Olympics in Helsinki, Bannister set a British record in the 1500 metres and finished in fourth place. This achievement strengthened his resolve to become the ...
The Polaris Dawn mission will carry four crew members on a risky journey into the radiation belt, and they’ll attempt the first spacewalk carried out by private citizens.
The original Naismith 's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent. [1][4] It is included in the last sentence of his report from a trip. [1][8] Today it is formulated in many ways. Naismith's 1 h / 3 mi + 1 h / 2000 ft can be replaced by:
Reviewed by Dietitian Jessica Ball, M.S., RD. Whether you're prepping lunch for a day at the office or needing a quick meal at home, make sure these 10-minute lunches are on your list.
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