词汇 | alkali |
释义 | alkali noun[ C or U ] chemistry specializeduk /ˈæl.kəl.aɪ/ us /ˈæl.kəl.aɪ/pluralalkalis a substance that has the opposite effect or chemical behaviour to an acid碱;强碱 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid antioxidant carbohydrate homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline soluble weak base Related wordsalkaline alkalinity alkali | American Dictionaryalkali noun[ C ] us/ˈæl·kəˌlɑɪ/pluralalkalis or alkalies chemistry a substance that has the opposite effect or chemical behavior of an acid alkalineadjectiveus/ˈæl·kəˌlɑɪn/ Examples of alkalialkali This is corroborated by the rather similar isotopic compositions of the alkali basalts and trachytes. Although they had clear morphological characteristics, they consisted of at least three families - acid salts, volatile alkalis, and vinous or inflammable spirits. Depleted olivine basalts are associated with radiolarian cherts while most pelagic limestones and cherts are found interbedded with alkali basalts. Overlying the alkali basalts are minor tephrite and plagioclase- and kaersutite-phyric phonotephrite lavas. Stricture formation is frequent after ingesting caustic chemicals such as strong acids or alkalis. In less-deformed portions of larger intrusive bodies, alkali feldspar porphyroclasts are still recognizable. These sources work by applying a layer of alkali metal atoms on a low work function substrate, usually tungsten. The technique coats a tungsten plug with aluminosilicate doped with an alkali metal, which is then sintered onto the tungsten. Such comparisons resulted in the creation of a specific order of precipitations of metals with metals or alkalis from acidic solutions. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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