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Definition of alkaloid in English: alkaloidnoun ˈalkəlɔɪdˈælkəˌlɔɪd Chemistry Any of a class of nitrogenous organic compounds of plant origin which have pronounced physiological actions on humans. They include many drugs (morphine, quinine) and poisons (atropine, strychnine). Example sentencesExamples - The cinchona tree contains more than 20 alkaloids of which quinine and quinidine are the most important.
- This material is a complex mixture of about 20 different alkaloids or nitrogen containing organic bases.
- CE analysis of plant secondary metabolites such as flavonoids, alkaloids, and phenolic acids is now common.
- Diuretics can be found in terpenes, phenolics and alkaloids.
- Caffeine is a bitter alkaloid found especially in coffee, tea, and kola nuts and used medicinally as a stimulant and diuretic.
- Second, the alkaloid is refluxed with acetic anhydride for about five hours.
- At present, the chemical components of this water extract are thought to include only alkaloids, terpenes and pigments.
- Many multicellular trichomes are glandular, developing a terminal gland which may secrete a variety of compounds, such as alkaloids to deter or poison predators.
- Prominent examples are quinolizidine alkaloids, gossypol, glucosinolates, nonproteinogenic amino acids and furanocoumarins.
- The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine.
- Terpenoid indole alkaloids absorb UV radiation and are implicated as having a UV-protective role in plants.
- Morphine is an alkaloid, meaning that it is an organic compound that contains carbon, hydrogen and nitrogen, and forms a water-soluble salt.
- They are precursors of benzoic phenanthridine alkaloids, active ingredients of many medicinal plant extracts.
- Key alkaloids present in goldenseal include berberine, hydrastine, and canadine.
- Other important alkaloids are caffeine, ricinine, and quinine.
- Berberine is an alkaloid occurring in the plant genera Berberis and Coptis.
- The alkaloids in poppy include morphine, narcotine and codeine - the reasons why opium is used most frequently as a sedative.
- Plant or vinca alkaloids are derived from plants and block cell division during mitosis.
- Barbiturates are derived from barbituric acid, an alkaloid with nitrogen-containing rings.
- Caffeine is a naturally occurring drug belonging to a group of compounds called alkaloids.
Origin Early 19th century: coined in German from alkali. Definition of alkaloid in US English: alkaloidnounˈælkəˌlɔɪdˈalkəˌloid Chemistry Any of a class of nitrogenous organic compounds of plant origin which have pronounced physiological actions on humans. They include many drugs (morphine, quinine) and poisons (atropine, strychnine). Example sentencesExamples - This material is a complex mixture of about 20 different alkaloids or nitrogen containing organic bases.
- Barbiturates are derived from barbituric acid, an alkaloid with nitrogen-containing rings.
- Morphine is an alkaloid, meaning that it is an organic compound that contains carbon, hydrogen and nitrogen, and forms a water-soluble salt.
- CE analysis of plant secondary metabolites such as flavonoids, alkaloids, and phenolic acids is now common.
- At present, the chemical components of this water extract are thought to include only alkaloids, terpenes and pigments.
- The isolation of morphine from opium takes advantage of the amphoteric nature of the alkaloid, since morphine is a phenolic amine.
- Second, the alkaloid is refluxed with acetic anhydride for about five hours.
- Prominent examples are quinolizidine alkaloids, gossypol, glucosinolates, nonproteinogenic amino acids and furanocoumarins.
- Many multicellular trichomes are glandular, developing a terminal gland which may secrete a variety of compounds, such as alkaloids to deter or poison predators.
- They are precursors of benzoic phenanthridine alkaloids, active ingredients of many medicinal plant extracts.
- Caffeine is a naturally occurring drug belonging to a group of compounds called alkaloids.
- Other important alkaloids are caffeine, ricinine, and quinine.
- The alkaloids in poppy include morphine, narcotine and codeine - the reasons why opium is used most frequently as a sedative.
- Berberine is an alkaloid occurring in the plant genera Berberis and Coptis.
- The cinchona tree contains more than 20 alkaloids of which quinine and quinidine are the most important.
- Key alkaloids present in goldenseal include berberine, hydrastine, and canadine.
- Caffeine is a bitter alkaloid found especially in coffee, tea, and kola nuts and used medicinally as a stimulant and diuretic.
- Diuretics can be found in terpenes, phenolics and alkaloids.
- Terpenoid indole alkaloids absorb UV radiation and are implicated as having a UV-protective role in plants.
- Plant or vinca alkaloids are derived from plants and block cell division during mitosis.
Origin Early 19th century: coined in German from alkali. |