Alkaloid - Wikipedia
Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom. This group also includes some related compounds with neutral [2] and even weakly acidic properties. [3] . Some synthetic compounds of …
Alkaloid | Definition, Structure, & Classification | Britannica
2024年11月8日 · Alkaloid, any of a class of naturally occurring organic nitrogen-containing bases. Alkaloids have diverse and important physiological effects on humans and other animals. Well-known alkaloids include morphine, strychnine, quinine, ephedrine, and nicotine.
Alkaloid - an overview | ScienceDirect Topics
Alkaloids are secondary metabolites originally defined as pharmacologically active compounds, primarily composed of nitrogen (Croteau et al., 2000; Ziegler & Facchini, 2008). They are synthesized from one of the few common amino acids: lysine, tyrosine and tryptophan.
Characteristics of alkaloids | Britannica
alkaloid, 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.
Alkaloid - Encyclopedia.com
2018年5月14日 · alkaloid, any of a class of organic compounds composed of carbon, hydrogen, nitrogen, and usually oxygen that are often derived from plants. Although the name means alkalilike, some alkaloids do not exhibit alkaline properties.
Alkaloid Definition & Meaning - Merriam-Webster
The meaning of ALKALOID is any of numerous usually colorless, complex, and bitter organic bases (such as morphine or caffeine) containing nitrogen and usually oxygen that occur especially in seed plants and are typically physiologically active.
Alkaloid - SpringerLink
2022年1月1日 · Alkaloids are cyclic compounds containing nitrogen in a negative oxidation state which is of limited distribution in a living organism. The term “alkaloid” marks its origin from the word “alkaline” which in Arabic means “ashes of plants.”
Alkaloid - an overview | ScienceDirect Topics
Alkaloids are one of the most diverse groups of secondary metabolites found in plants, marine organisms, and microorganisms. They have an array of structural types, biosynthetic pathways, and pharmacological activities.
Alkaloid - Function, Properties, Classifications, and Extraction
Alkaloids meaning can be defined as any naturally occurring organic nitrogen-containing class bases. Alkaloids contain diverse and essential physiological effects on humans and on other animals. A few of the well-known alkaloids can be given as strychnine, morphine, ephedrine, quinine, and nicotine. Alkaloids originated from the word alkali.
Alkaloid - an overview | ScienceDirect Topics
Alkaloids are a highly heterogeneous group of compounds widespread throughout the Plant Kingdom, although also present in some fungi, bacteria, and even animals. Some synthetic compounds of similar structure may also be named alkaloids.