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A half marathon is a road running event of 21.0975 kilometres (13 miles 192.5 yards)—half the distance of a marathon. [1] It is common for a half marathon event to be held concurrently with a marathon or a 5K race, using almost the same course with a late start, an early finish, or shortcuts. [2]
The women's record is 1:02:52, set by Letesenbet Gidey on 24 October 2021, at the Valencia Half Marathon. The previous record of 1:04:02 was set by Ruth Chepngetich of Kenya on 4 April 2021, in Istanbul, Turkey. On 8 September 2019, Brigid Kosgei ran a time of 1:04:28 at the 2019 Great North Run in Newcastle, England.
1:05:50: Norman Green United States: 27 Jun 1932: 50: 29 May 1983: Washington, DC USA M55: 1:07:46: Martín Fiz Spain: 03 Mar 1963: 55: 24 Mar 2018: IAAF Trinidad Alfonso World Half Marathon Championships Mass Race: Valencia ESP M60: 1:12:36: Doug Winn United States: 02 Feb 1950: 60: 06 Sep 2010: New Haven Road Race: New Haven, Connecticut USA ...
In the United States the pace is an uncommon customary unit of length denoting a brisk single step and equal to 2 + 1 ⁄ 2 feet or 30.0 inches or 76.2 centimetres. [ 3 ] [ 4 ] The Ancient Roman pace ( Latin : passus ) was notionally the distance of a full stride from the position of one heel where it raised off of the ground to where it set ...
Rice bran is a byproduct of the rice-milling process (the conversion of brown rice to white rice), and it contains various antioxidants. A major rice bran fraction contains 12%–13% oil and highly unsaponifiable components (4.3%).
Along with bran, germ is often a by-product of the milling [3] that produces refined grain products. Cereal grains and their components, such as wheat germ oil , [ 4 ] rice bran oil , and maize bran, [ 5 ] may be used as a source from which vegetable oil is extracted, or used directly as a food ingredient.
For a performance to be ratified as a world record by World Athletics, the marathon course on which the performance occurred must be 42.195 km (26.219 mi) long, [34] measured in a defined manner using the calibrated bicycle method [35] (the distance in kilometers being the official distance; the distance in miles is an approximation) and meet other criteria that rule out artificially fast ...
Rice husk ash has long been used in ceramic glazes in rice growing regions in the Far East, e.g. China and Japan. [2] Being about 95% silica, it is an easy way of introducing the necessary silica into the glaze, and the small particle size helps with an early melt of the glaze.