basic compound obtained from a plant; a plant extract that contains heterocyclic amines that have physiological effects
Alkaloids occur naturally in nature They are nitrogen-containing compounds that are alkaline when in solution We taste them as "bitter " They exert a physiological presence Nicotine and caffeine are alkaloids
(noun) Any of various organic compounds, normally with bases and usually containing at least one nitrogen atom in a heterocyclic ring, occurring chiefly in many vascular plants and some fungi Many alkaloids, such as nicotine, quinine, cocaine, and morphine, are known for their poisonous or medicinal attributes
-any of hundreds of compounds found in plants with a nitrogen atom connected to two carbon atoms, and often formed in a ring structure Many commonly known chemicals and drugs are alkaloids, including nicotine, cocaine, quinine, morphine, and ephedrine
Basic (see base) organic compounds of plant origin, containing combined nitrogen. Alkaloids are amines, so their names usually end in "ine" (e.g., caffeine, nicotine, morphine, quinine). Most have complex chemical structures of multiple ring systems. They have diverse, important physiological effects on humans and other animals, but their functions in the plants that produce them are poorly understood. Some plants (e.g., opium poppy, ergot fungus) produce many different alkaloids, but most produce only one or a few. Certain plant families, including the poppy family (Papaveraceae) and the nightshade family (Solanaceae), are particularly rich in them. Alkaloids are extracted by dissolving the plant in dilute acid
A group of alkaloids, including atropine and scopolamine, found in plants such as belladonna and jimsonweed. They are used in medicine to dilate the pupils of the eyes, dry respiratory passages, prevent motion sickness, and relieve cramping of the intestines and bladder
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