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Gastroenterology. Gallstone ileus is a rare form of small bowel obstruction caused by an impaction of a gallstone within the lumen of the small intestine. Such a gallstone enters the bowel via a cholecysto - enteric fistula. The presence of large stones, >2.5 cm in diameter, within the gallbladder are thought to predispose to fistula formation ...
The largest fish of the now-extinct class Placodermi was the giant predatory Dunkleosteus. The largest and most well known species was D. terrelli, which grew almost 9 m (29.5 ft) in length [ 21] and 4 t (4.4 short tons) [ 22] in weight. Its filter feeding relative, Titanichthys, may have rivaled it in size. [ 23]
The nanometre ( SI symbol: nm) is a unit of length in the metric system equal to 10−9 metres ( 1 1 000 000 000 m = 0.000 000 001 m ). To help compare different orders of magnitude, this section lists lengths between 10 −9 and 10 −8 m (1 nm and 10 nm). 1 nm – diameter of a carbon nanotube.
from "Big Red", by J.A. Estes [a] On March 30, 1970, at 12:10 a.m. at the Meadow Stud in Caroline County, Virginia, Somethingroyal foaled a bright-red chestnut colt with three white socks and a star with a narrow stripe. The foal stood when he was 45 minutes old and nursed 30 minutes later. Howard Gentry, the manager of Meadow Stud, was at the foaling and later said, "He was a very well-made ...
t. e. In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light ). The opposite change, a decrease in wavelength and increase in frequency and energy, is known as a blueshift, or negative redshift. The terms derive from the colours red and ...
Most polyps are benign and do not need to be removed. Surgical removal of the gallbladder (cholecystectomy) is recommended when a gallbladder polyp larger than 1 cm is found, even if the person has no symptoms clearly related to the polyp. Laparoscopic surgery is an option for small or solitary polyps. [citation needed]
Synonyms. Chalicodoma pluto (Smith, 1860) Megachile pluto, also known as Wallace's giant bee or raja ofu ( lit. 'king of the bees' ), [ 2] is a large resin bee found in Indonesia. With a wingspan of 63.5 mm (2.5 in), it is the largest known living bee species. It was believed to be extinct until several specimens were discovered in 1981.
Among the 70 capital cities investigated, Baghdad, Iraq is the worst performing one, with PM 2.5 levels going up +31.6 μg / m 3 . Ulan Bator (Ulaanbaatar), the capital city of Mongolia, is performing the best, with PM 2.5 levels dropping by -23.4 μg / m 3 . Previously it was as one of the most polluted capital cities in the world.