BPharm 5th Sem Notes

 Tannin Derived from the Frenck work “Tanin” means tanning substance. These are chemically Natural Polyphenols – It contains sufficient hydroxyl group and other suitable group such as carboxyl, to form strong complex with protein and other macromolecules. This term first used by Seguin (1796). Tannins are Complex Non nitrogenous Plant product. Astringent property – Precipitate tissue protein.

You may also read Introduction to Tannins  Identification Test for Tannin 1. Goldbeater’s skin test:  Goldbeater’s Skin soaked in 2% HCl for 5 minutes. Rinse with distilled water Place in solution of tannin for 5minutes Wash distilled water Treat with Ferrous sulphate solution Black-Brown Colour observed. 2. Gelatine Test: Tannin Solution + 1% Gelatine Solution +

Goldbeater’s skin is the processed outer membrane of the intestine of an animal, typically an ox, valued for its strength against tearing. Usage of Goldbeater’s skin: It is used in Goldbeater’s skin test for tannins. Traditionally, it is used in the repair of manuscripts written on vellum. The intestines, having been cut into sections and

 Iridoids Generally, Iridoids are known as pseudo-glycoside because it forms on combination of terpenoid and glycoside. There common variety of animals and dicotyledon plant belonging to family Rubiaceae and Perpherbiaceae. Some plants belonging to family Scrophulariaceae also contain iridoids. Mostly all cardiac glycosides are in family Scrophulariaceae. The Iridoids were named after end of ants from which they were isolated and involved

 Iridoids Generally, Iridoids are known as pseudo-glycoside because it forms on combination of terpenoid and glycoside. There common variety of animals and dicotyledon plant belonging to family Rubiaceae and Perpherbiaceae. Some plants belonging to family Scrophulariaceae also contain iridoids. Mostly all cardiac glycosides are in family Scrophulariaceae. The Iridoids were named after end of ants from which they were isolated and involved