… Guayule rubber has been attracting attention recently. It is extracted from the shrub guayule (Parthenium argentatum A. Gray) of the Asteraceae family that grows in dry areas with little rainfall, such as southern North America and Mexico. It has the same cis-1,4 bond polyisoprene structure as natural rubber obtained from the Para rubber tree, and its performance is almost the same. This rubber has a long history, and in the early 20th century, Mexican guayule rubber was used in considerable quantities in the United States. … *Some of the terminology that mentions "Parthenium argentatum" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 最近グアユールゴムgum guayuleが注目されている。これは北アメリカ南部,メキシコなど降雨量の少ない乾燥地帯に生えるキク科の灌木グアユールParthenium argentatum A.Grayから抽出されるもので,パラゴムノキから得られる天然ゴムと同じシス‐1,4結合ポリイソプレン構造をもち,性能的にもほとんどかわらない。このゴムの歴史は古く,20世紀初期にはメキシコ産のグアユールゴムがアメリカで相当量使用されていた。… ※「Parthenium argentatum」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
Year of death: 20th November 1712 (18th December 1...
…Generally, it refers to trade associations of me...
A city in Katanga Province in the southeastern par...
Retailing of books, magazines, and other publicat...
A large crow, or a large crow with a big head, th...
A Greek military writer who lived in Rome in the 2...
…The Rubik's Cube (Figure 42-a) is said to be...
...Because shape memory alloys have properties no...
...Mountain forests can be seen from an altitude ...
〘 noun 〙 An official who handles matters related t...
...Industrialists soon began to plan new towns th...
A spy during the Sino-Japanese War. She was the 14...
Based on the Child Allowance Act (Act No. 73 of 1...
◎ Urine accumulates in the renal pelvis or calyx [...
...A race of brave female warriors in Greek legen...