It is a tropical tree consisting of about 600 species in 40 genera. Many of them are economically valuable because they secrete resin and latex and produce delicious fruit. The sapodilla tree Achras zapota , native to tropical America, produces sweet, juicy fruit similar to that of a persimmon. The bark is damaged and the latex is collected to make chicle, the raw material for chewing gum. The gutta-percha tree Palaquium gutta , native to the Malay Peninsula, produces gutta-percha. This is a rubber with low elasticity but good electrical insulation properties; it was once used as an insulator for undersea electric cables and as a filling material for cavities. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
熱帯産の樹木で,約 40属 600種からなる。樹脂や乳液を分泌したり美味な果実を産するため経済的な価値のあるものが多い。熱帯アメリカ産のサポジラ Achras zapota はカキに似た甘い汁の多い果実を生じる。また樹皮を傷つけて得られる乳液を集めてチューインガムの原料チクルをつくる。マレー半島原産のグッタペルカノキ Palaquium gutta はグッタペルカを産する。これは弾性の少ないゴムであるが電気の絶縁性がよく,かつては海底電線の絶縁体に使われ,また虫歯の充填材料として用いる。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
<<: Red-handed howler monkey - Red-handed howler monkey
Iron sulfate. Three types are known: (1) Iron(II)...
This refers to fats and oils (esters of fatty aci...
…Specifically, he aimed to restore and increase t...
…When a precipitate forms, other substances that ...
A global financial market in London. The so-called...
〘Noun〙 In ancient times, these were supplementary ...
A method for integrating functions of multiple va...
A strait between Honshu and Hokkaido. It is about ...
〘Noun〙 The name of a shamisen tuning technique. Th...
This river flows through Nikko city in western To...
…the name of a god that appears in Japanese mytho...
This is the label name for paperbacks published by...
...A lens with chromatic aberration corrected. It...
…The import of Western music in the early Meiji p...
Strategic Business Planning: Coordinating the acti...