a substance found in the leaves and beans of the coffee tree, in tea, yerba mate, guarana berries, and in small amounts in cocoa. it can also be made in the laboratory, and is added to some soft drinks, foods, and medicines. caffeine increases brain activity, alertness, attention, and energy. it may also increase blood pressure, heart rate, breathing rate, and the loss of water from the body in urine.
出典:Wikipedia
出典:『Wikipedia』 (2011/08/09 13:02 UTC 版)
Caffeine is a bitter, white crystalline xanthine alkaloid and psychoactive stimulant. Caffeine was first isolated from coffee in 1820 by the German chemist Friedlieb Ferdinand Runge and in 1821 by French chemists, Robiquet as well as the team of Pelletier and Caventou, working independently. Pelletier first coined the word "cafeine" from the French word for coffee (café ) and this term became the English word "caffeine".
コーヒーのかす
someone addicted to caffeine
a café
チャッピー
コイガ
sculpins