Glycosides
These are water-soluble constituents, found in the cell sap. They are colorless, crystalline substances containing carbon, hydrogen and oxygen (Fig. 5.140). Some glycosides are peculiar in having nitrogen and sulfur. Glycosides are neutral in reaction. Chemically, glycosides contain a carbohydrate (glucose) and a non-carbohydrate part (aglycone or genin). Alcohol, glycerol or phenol represents aglycones. A glycoside can be readily hydrolyzed into its components with ferments or mineral acids.
CH2OH
CH2OH
Fig. 5.140 Structure of glycoside.
Fig. 5.140 Structure of glycoside.
Glycosides differ in their solubility in water. Some are soluble in ether and alcohol. Amygdalin found in almonds is a similar example to that of a glycoside (Fig. 5.141). Benzeldehyde is the decomposition product of amygdalin, responsible for the odor and taste of almonds. Glycosides are optically active and are levorotatory. Adenanthera pavonina contains HCN-glucoside known as lignoceric acid.
OC6H10O4O-C6H11O5
Classification (Fig. 5.142)
Glycosides are classified on the basis of:
A. Type of sugar.
B. According to chemical nature of aglycone.
C. According to pharmacological action.
- Fig. 5.142 Classification of Glycosides.
30 Day Low Carb Diet Ketosis Plan
An Open Letter To Anyone Who Wants To Lose Up To 20 Pounds In 30 Days The 'Low Carb' Way. 30-Day Low Carb Diet 'Ketosis Plan' has already helped scores of people lose their excess pounds and inches faster and easier than they ever thought possible. Why not find out what 30-Day Low Carb Diet 'Ketosis Plan' can do for you by trying it out for yourself.
Post a comment