File:Caffeine_structure.svg · Wikimedia Commons · See Wikimedia Commons
Also known as methyltheobromine, 1,3,7-trimethyl-2,6-dioxopurine, 1,3,7-trimethylxanthine, theine, 7-methyltheophylline, 1-methyltheobromine, guaranine, 1,3,7-trimethylpurine-2,6-dione
有機化合物
Caffeine is a stimulant drug found in many common beverages and foods that works by blocking a natural brain chemical called adenosine, which helps keep you alert and can improve physical and mental performance. It's the most widely used psychoactive substance in the world, consumed by people seeking increased wakefulness, better focus, or simply as part of social and recreational activities.
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咖啡因(英語:caffeine)是一种黄嘌呤生物碱化合物。 咖啡因主要存在于咖啡树、茶树、巴拉圭冬青(玛黛茶)及瓜拿纳的果实及叶片裡,而可可樹、可樂果及代茶冬青树也存在少量的咖啡因。存在于瓜拿纳中的咖啡因有时也被称为瓜拿纳因(guaranine),而存在于玛黛茶中的被称为马黛因(mateine),在茶中的则被称为茶素(theine)。总体上来说,作为一种自然杀虫剂,目前在超过60种植物的果实、叶片和种子中发现了咖啡因,它能使以这些植物为食的昆蟲麻痹来达到殺蟲的效果。 咖啡因是一种中枢神经兴奋剂,能暫時地驱走睡意并恢复精力,所以人们在从事思考、阅读、会议等时,有时会选择摄入咖啡因来提神。有咖啡因成分的咖啡、茶、软饮料及能量饮料十分畅销,因此也有一定的成癮性(Coffee addiction),咖啡因也是世界上最普遍被使用的精神药品。在北美,90%成年人每天都會需要攝食咖啡因。 很多咖啡因的自然来源也含有多种其他的黄嘌呤生物碱,包括茶碱和可可碱這兩種以及其他物质例如单宁酸。
Abstract from DBpedia / Wikipedia · CC BY-SA
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).
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