Your browser is too old
We can't provide a great video experience on old browserUpdate now
This sqadia.com medical video lecture is about essential fatty acids. Sidra Afzal talks about the importance and functions of essential fatty acids. Then focus is shifted towards alcohols including glycerol, acrolein test which detects the presence of alcohols. Steroids and sterols, and cholesterol are also discussed.
Importance of Essential Fatty Acids
Essential fatty acids are polyunsaturated fatty acids. Linoleic acid is the most important essential fatty acid. Sidra Afzal in her medical video lecture at sqadia.com elucidates why essential fatty acids cannot be synthesised? Following this, functions of EFA are pursued along with the clinical aspects. Docosahexaenoic acid is also discussed which is a polyunsaturated fatty acid synthesized from α-linolenic.
Glycerol is the simplest trihydric alcohol. It is a colourless oily fluid with a sweetish taste. Industrial and physiological source of glycerol is described afterwards. How acrolein test detect presence of glycerol is also reported. Furthermore, educator notify about the use of glycerol in industry and in medicine. Lastly, information about unsaturated alcohols is delivered.
Steroids and Sterols
Liebermann-Burchard reaction, Salkowski test, and Zak’s reaction is deliberated under the heading of colour reactions of sterols. Then 7-Dehydrocholesterol is presented which differs from cholesterol in having a second double bond. Ergosterol, stigmasterol and sitosterol, and coprosterol are discussed in succession in this section along with other steroids of biomedical importance.
Cholesterol possesses cyclopentanoperhydrophenanthrene nucleus. Exogenous and endogenous source of cholesterol is enlightened. Two forms of cholesterol are free form and ester form. Moving onward, esterification of cholesterol comes under consideration. Discussion continues on Norum’s disease which arises due to the failure of esterification of cholesterol. Concluding comments are given on biomedical importance of cholesterol.