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Paroxysmal nocturnal hemoglobinuria ( PNH) is a rare, acquired, [ 1] life-threatening disease of the blood characterized by destruction of red blood cells by the complement system, a part of the body's innate immune system. This destructive process occurs due to deficiency of the red blood cell surface protein DAF, which normally inhibits such ...
Haidao Suanjing(海島算經; The Island Mathematical Manual) was written by the Chinese mathematicianLiu Huiof the Three Kingdomsera (220–280) as an extension of chapter 9 of The Nine Chapters on the Mathematical Art.[1] During the Tang dynasty, this appendix was taken out from The Nine Chapters on the Mathematical Artas a separate book ...
t. e. Ceramic insulator used on an electrified railway. Three-core copper wire power cable, each core with an individual colour-coded insulating sheath, all contained within an outer protective sheath. An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons ...
Men's pole vault world record progression. The first world record in the men's pole vault was recognized by the International Association of Athletics Federations in 1912. [ 1] As of June 21, 2009, 71 world records have been ratified by the IAAF (now World Athletics) in the event. Since 2000, World Athletics makes no distinction between indoor ...
High Standard revolvers were manufactured in a variety of models in .22 Short, .22 Long Rifle and .22 Magnum chambering from 1955 until the mid-1980s. [3]In 1957 High Standard introduced new models and finishes: a two-inch snubnosed with round butt, a Western model and the successful "Sentinel", one feature that boosted sales was its 9-shot capacity, all models had 9-shot cylinders.
Approximately 50,000–60,000 Poles died as a result of the massacres in Volhynia, while up to 2,000–3,000 Ukrainians died as a result of Polish retaliatory actions. [20] [21] [22] At the 3rd OUN Congress in August 1943, Mykola Lebed criticised the Ukrainian Insurgent Army's actions in Volhynia as "bandit".
NORWICH, Conn. (AP) — Veteran diplomat Martin S. Indyk, an author and leader at prominent U.S. think tanks who devoted years to finding a path toward peace in the Middle East, died Thursday.
The following is the Men's pole vault indoor world record progression starting from 1889, with additional demonstration and professional records being noted. The best indoor performances on record as agreed to by the world's leading statisticians were accepted as the inaugural Indoor World Records from 1 January 1987; previous to this, they were regarded as world indoor bests. [1]