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  1. › wiki › Amino_acidAmino acid - Wikipedia

    Amino acid. Structure of a generic L -alpha-amino acid in the "neutral" form. Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. [1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. [2]

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  3. › wiki › CocaineCocaine - Wikipedia

    Cocaine (from French: cocaïne, from Spanish: coca, ultimately from Quechua: kúka)[14] is a tropane alkaloid that acts as a central nervous system (CNS) stimulant. As an extract, it is mainly used recreationally, and often illegally for its euphoric and rewarding effects. It is also used in medicine by Indigenous South Americans for various ...

  4. › wiki › EsperantoEsperanto - Wikipedia

    Esperanto ( / ˌɛspəˈrɑːntoʊ /, /- æntoʊ /) [7] [8] is the world's most widely spoken constructed international auxiliary language. Created by the Warsaw -based ophthalmologist L. L. Zamenhof in 1887, it is intended to be a universal second language for international communication, or "the international language" ( la Lingvo Internacia ).

  5. › wiki › MethaneMethane - Wikipedia

    Methane (US: /ˈmɛθeɪn/ METH-ayn, UK: /ˈmiːθeɪn/ MEE-thayn) is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane on Earth makes it an economically attractive fuel ...

  6. › wiki › WiiWii - Wikipedia

    The Wii [g] ( / ˈwiː / WEE) is a home video game console developed and marketed by Nintendo. It was released on November 19, 2006, in North America and in December 2006 for most other regions of the world. It is Nintendo's fifth major home game console, following the GameCube and is a seventh-generation console alongside Microsoft 's Xbox 360 ...

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