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Tungsten (also called wolfram)[11][12] is a chemical element; it has symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a new element in 1781 and first isolated as a metal in 1783. Its important ores include scheelite and wolframite, the ...
Maka dai dai shōgi (摩訶大大将棋 or 摩𩹄大大象戯 'ultra-huge chess') is a large board variant of shogi (Japanese chess). The game dates back to the 15th century and is based on dai dai shogi and the earlier dai shogi. The three Edo-era sources are not congruent in their descriptions of the pieces not found in smaller games.
- History
- Etymology
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Borax was first discovered in dry lake beds in Tibet. Native tincal from Tibet, Persia, and other parts of Asia was traded via the Silk Road to the Arabian Peninsulain the 8th century AD. Borax first came into common use in the late 19th century when Francis Marion Smith's Pacific Coast Borax Company began to market and popularize a large variety o...
The English word borax is Latinized: the Middle English form was boras, from Old French boras, bourras. That may have been from Medieval Latin baurach (another English spelling), borac(-/um/em), borax, along with Spanish borrax (> borraj) and Italian borrace, in the 9th century, and from Arabic buraq (بورق) as mentioned for example in kitab al-tabi...
From the chemical perspective, borax contains the [B4O5(OH)4]2−ion. In this structure, there are two four-coordinate boron centers and two three-coordinate boron centers. It is a proton conductor at temperatures above 21 °C. Conductivity is maximum along the b-axis. Borax is also easily converted to boric acid and other borates, which have many app...
Borax occurs naturally in evaporite deposits produced by the repeated evaporation of seasonal lakes. The most commercially important deposits are found in: Turkey; Boron, California; and Searles Lake, California. Also, borax has been found at many other locations in the Southwestern United States, the Atacama desert in Chile, newly discovered depos...
Borax is used in pest control solutions because it is toxic to ants. Because it is slow-acting, worker ants will carry the borax to their nests and poison the rest of the colony. Borax is used in various household laundry and cleaning products, including the 20 Mule Team Borax laundry booster, Boraxo powdered hand soap, and some tooth bleachingform...
According to one study, borax is not acutely toxic. Its LD50(median lethal dose) score is tested at 2.66 g/kg in rats, meaning that a significant dose of the chemical is needed to cause severe symptoms or death. The lethal dose is not necessarily the same for humans. On pesticide information websites it is listed as a non-lethal compound and of no ...
International reserve currency. Historical exchange rate. See also. Notes. References. Further reading. External links. Japanese yen. USD /JPY exchange rate 1971–2023. The yen ( Japanese: 円, symbol: ¥; code: JPY) is the official currency of Japan.
Zhencheng Lou. The Fujian tulou ( simplified Chinese: 福建土楼; traditional Chinese: 福建土樓; pinyin: Fújiàn tǔlóu; lit. 'Fujian earthen buildings') are Chinese rural dwellings [1] unique to the Hakka in the mountainous areas in southeastern Fujian, China. They were mostly built between the 12th and the 20th centuries.
The Monkey King or Sun Wukong ( simplified Chinese: 孙悟空; traditional Chinese: 孫悟空; pinyin: Sūn Wù Kōng) is a fictional character best known as one of the main players in the 16th-century Chinese novel Journey to the West ( traditional Chinese: 西遊記; simplified Chinese: 西游记 ), and many later stories and adaptations. [1]
Teletubbies is a British children's television series created by Anne Wood and Andrew Davenport for the BBC. The programme focuses on four differently coloured characters known as the Teletubbies, named after the television screens on their bellies. Recognised throughout popular culture for the uniquely shaped antenna protruding from the head ...
