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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 ...
Updated on March 2023. Holly Bethan Bradshaw (née Bleasdale, born 2 November 1991) is an English track and field athlete who specialises in the pole vault. She used to be the British record holder in the event indoors and outdoors, with clearances of 4.87 metres (2012 indoors) and 4.90 metres (2021 outdoors). Bradshaw won a bronze medal at the ...
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 ...
A geomagnetic reversal is a change in a planet's dipole magnetic field such that the positions of magnetic north and magnetic south are interchanged (not to be confused with geographic north and geographic south ). The Earth's magnetic field has alternated between periods of normal polarity, in which the predominant direction of the field was ...
The Turabay dynasty was a family of Bedouin emirs who governed the district of Lajjun in northern Palestine during Ottoman rule in the 16th–17th centuries. The family's forebears had served as chiefs of Jezreel Valley during Mamluk rule in the late 15th century. During the Ottoman conquest of the region in 1516–1517, the family aided ...
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.
Pole and polar. The polar line q to a point Q with respect to a circle of radius r centered on the point O. The point P is the inversion point of Q; the polar is the line through P that is perpendicular to the line containing O, P and Q. In geometry, a pole and polar are respectively a point and a line that have a unique reciprocal relationship ...
Restored Premium Dyson Supersonic Hair Dryer. $220 $350 Save $130. With this high-end supersonic hair dryer by Dyson, you'll style your hair like the pros. It's a fan favorite. $220 at Walmart ...