Class (56) = Tannin (Part 01) | Introduction of Tannin (Definition, Occurence and Distribution)

Download "Solution Pharmacy" Mobile App to Get All Uploaded Notes, Model Question Papers, Answer Papers, Online Test and other GPAT Materials - https://play.google.com/store/apps/de...

Unit 4 Pharmacognosy- Alkaloids and Glycosides
   • Class (44) = Primary and Secondary Me...  

Definition: The name ‘tannin’ is derived from the French word ‘tanin’ (tanning substance) and is used for a range of natural polyphenols. Tannin are phenolic compound of sufficiently high molecular weight containing sufficient hydroxyls and other suitable groups (i.e. carboxyls) to form effectively strong complexes with protein and other macromolecules under the particular environmental conditions. Tannins are astringent, bitter plant polyphenols that either bind and precipitate or shrink proteins.

The astringency from the tannins is that which causes the dry and puckery feeling in the mouth following the consumption of red wine, strong tea, or an unripened fruit. The term tannin refers to the use of tannins in tanning animal hides into leather; however, the term is widely applied to any large polyphenolic compound containing sufficient hydroxyls and other suitable groups (such as carboxyls) to form strong complexes with proteins and other macromolecules. Tannins have molecular weights ranging from 500 to over 3000.

Occurrence
Tannins are distributed all over the plant kingdom. Tannins are formed upon the decomposition of vegetation. Tannins are found in leaf tissues, bud tissues, seed tissues, root tissues and stem tissues. An example of the location of the tannins in the stem tissue is that they are often found in the growth areas of trees, such as the secondary phloem and xylem and the layer between the cortex and
epidermis.
Medicinal use
1. Natural healing, the tannin-containing plant extracts are used as astringents, against diarrhoea, as diuretics, against stomach and duodenal tumours and as antiinflammatory, antiseptic, and haemostatic pharmaceuticals.
2. As tannins can precipitate heavy metals and alkaloids (except morphine), they can be used as antidote in poisonings with these substances.
3. Tannins are used in the dyestuff industry as caustics for cationic dyes (tannin dyes), and also in the production of inks (iron gallate ink).
4. In the food industry tannins are used to clarify wine, beer, and fruit juices. Other industrial uses of tannins include textile dyes, as antioxidants in the fruit juice, beer, and wine industries, and as coagulants in rubber production.

Get in touch with the solution by just clicking following links-

Facebook Group-   / solutionpharamcy  
Facebook Page-   / pharmavideo  
New channel (Pharmacy Dictionary) -    / @pharmacydictionary  
Instagram-   / solutionpharmacy  
E-Mail for official and other work - [email protected]
LinkedIn-   / pushpendrakpatel  
#solutionpharmacy #Pharmacologyclass #GPATonlinetest