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K 2 is both a tissue and bacterial product (derived from vitamin K 1 in both cases) and is usually found in animal products or fermented foods. [1] The number n of isoprenyl units in their side chain differs and ranges from 4 to 13, hence vitamin K 2 consists of various forms. [2] It is indicated as a suffix (-n), e. g. MK-7 or MK-9.
Jim Wickwire (born June 8, 1940) is the first American to summit K2, the second highest mountain in the world (summit at 8,611 m (28,251 ft)). [1] [2] [3] Wickwire is also known for surviving an overnight solo bivouac on K2 at an elevation above 27,000 ft or 8,200 m; considered "one of the most notorious bivouacs in mountaineering history".
Vitamin K is a family of structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. [1] The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation ("K" from Danish koagulation, for "coagulation") or for controlling binding of calcium in bones and other tissues. [2]
Seeds likely used for herbalism have been found in archaeological sites of Bronze Age China dating from the Shang dynasty [10] (c. 1600 BCE–c. 1046 BCE). Over a hundred of the 224 drugs mentioned in the Huangdi Neijing – an early Chinese medical text – are herbs. [ 11 ]
K2, at 8,611 metres (28,251 ft) above sea level, is the second-highest mountain on Earth, after Mount Everest at 8,849 metres (29,032 ft). [5] It lies in the Karakoram range, partially in the Gilgit-Baltistan region of Pakistan-administered Kashmir and partially in the China-administered Trans-Karakoram Tract in the Taxkorgan Tajik Autonomous County of Xinjiang.
As an example of its accuracy, 18th century scientist Guillaume Le Gentil, during a visit to Pondicherry, India, found the Indian computations (based on Aryabhata's computational paradigm) of the duration of the lunar eclipse of 30 August 1765 to be short by 41 seconds, whereas his charts (by Tobias Mayer, 1752) were long by 68 seconds.
K2 from the south. The Abruzzi Spur attempted by the expedition is the last spur before the right hand skyline. The highest point reached is the flattened part of the skyline at two-thirds height. The 1953 American Karakoram expedition was a mountaineering expedition to K2, at 8,611 metres the second highest mountain on Earth.
The 1938 American Karakoram expedition to K2, more properly called the "First American Karakoram expedition", investigated several routes for reaching the summit of K2, an unclimbed mountain at 28,251 feet (8,611 m) the second highest mountain in the world.