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a i., PROPERTIES:, , e@ They are found in all volatile oils., , e@ They are colorless liquid and solid with pleasant, , smell, , e@ They are insoluble in water and soluble in, , alcohol, @ They are optically active., , @ They are volatile in nature,, , rar oe eae iors

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THERAPEUTIC USES AND, PHARMACEUTICAL APPLICATIONS:, , As perfumery, , Cosmetic, soaps, incense sticks, Foods, due to their pleasant flavor., Antiseptic, stimulant, Carminative, diuretic, , Analgesic, antirheumatic aromatic etc.

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7 ISOLATION OR EXTRACTION OF, TERPENOIDS, , e 1. Volatile oil obtained in first step of, distillation contains mono and, sesquiterpines. During fractional, distillation of volatile oil, monoterpenoids, hydrocarbons get distilled followed by, their oxygenated derivative., , e@ 2. Terpenoids are also extracted by some, physical methods and chemical methods, by using various reagents like phenyl, hydrazine, Tilden’s reagent, Girard, reagent, etc. also Distillation under, , reduced pressure and several types of, , , , , , chromatographic methods are used for, their isolation.