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Many of the world records in swimming were established by swimmers wearing bodysuits or suits made of polyurethane or other non-textile materials allowed in the race pool from February 2008 until December 2009. These suits seemed to improve the performance for top athletes, especially those with larger physiques.
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, [3] [2] [4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
The reaction of 1,4-phenyl-diamine (para-phenylenediamine) and terephthaloyl chloride to produce an aramid. Polyamides can also be synthesized from dinitriles using acid catalysis via an application of the Ritter reaction. This method is applicable for preparation of nylon 1,6 from adiponitrile, formaldehyde and water. [4]
Due to hydrogen bonding, microfiber cloth containing polyamide absorbs and holds more water than other types of fibres. Microfiber is widely used by car detailers to handle tasks such as removing wax from paintwork, quick detailing, interior cleaning, glass cleaning, and drying.
Melon Dash has been teaching swimming to adults afraid to get into the water for decades, in a world where swim instruction focuses mostly on kids. But three out of four drowning deaths involve ...
Nylon 1,6 (aka polyamide 1,6) is a type of polyamide or nylon. [1] Unlike most other nylons, nylon 1,6 is not a condensation polymer, but instead is formed by an acid-catalyzed synthesis from adiponitrile, formaldehyde, and water. The material was produced and studied by researchers at DuPont in the 1950s. [2]
For the first time in a decade, rates of adult obesity in the United States have dropped, a new study has found.. The study followed nearly 17 million people, the majority of whom were in the 26 ...
Originally known as surf trunks, later as Jams, and occasionally in British English as swim shorts, boardshorts are a style of male [1] and, more recently, female [2] summerwear. The name "boardshorts" is based on their use in aquatic sports that use a board, such as surfing .