Lipids, Fats, and Biochemistry

Recent trends and innovations in the hydrogenation and interesterification of oils and fats include the development of new catalysts for more efficient and selective hydrogenation, the exploration of alternative interesterification methods to reduce trans fat formation, and the investigation of the use of interesterified oils and fats in novel food applications, such as functional foods and nutraceuticals.

Albumin, a protein found in egg whites, is responsible for their characteristic elasticity and foaming properties.

Saturated fatty acids have no double bonds between carbon atoms, making them saturated with hydrogen atoms. Palmitic acid is a saturated fatty acid with 16 carbon atoms.

The general formula for a saturated fatty acid is $CH_3(CH_2)_{n}COOH$, where n is the number of carbon atoms in the chain.

Monounsaturated fatty acids have one double bond between carbon atoms. Palmitoleic acid is a monounsaturated fatty acid with 16 carbon atoms and one double bond.

The general formula for a monounsaturated fatty acid is $CH_3(CH_2){n-1}CH=CH(CH_2){m}COOH$, where n is the number of carbon atoms in the chain before the double bond, and m is the number of carbon atoms in the chain after the double bond.

Polyunsaturated fatty acids have more than one double bond between carbon atoms. Linoleic acid is a polyunsaturated fatty acid with 18 carbon atoms and two double bonds.

The general formula for a polyunsaturated fatty acid is $CH_3(CH_2){n-6}CH=CHCH_2CH=CH(CH_2){m}COOH$, where n is the number of carbon atoms in the chain before the first double bond, and m is the number of carbon atoms in the chain after the last double bond.

Omega-3 fatty acids have their last double bond three carbon atoms from the methyl end of the molecule. Alpha-linolenic acid is an omega-3 fatty acid with 18 carbon atoms and three double bonds.

The general formula for an omega-3 fatty acid is $CH_3(CH_2){n-3}CH=CHCH_2CH=CH(CH_2){m}COOH$, where n is the number of carbon atoms in the chain before the first double bond, and m is the number of carbon atoms in the chain after the last double bond.

Omega-6 fatty acids have their last double bond six carbon atoms from the methyl end of the molecule. Linoleic acid is an omega-6 fatty acid with 18 carbon atoms and two double bonds.

The general formula for an omega-6 fatty acid is $CH_3(CH_2){n-6}CH=CHCH_2CH=CH(CH_2){m}COOH$, where n is the number of carbon atoms in the chain before the first double bond, and m is the number of carbon atoms in the chain after the last double bond.

Trans fatty acids are formed when unsaturated fatty acids are hydrogenated, a process that converts some of the cis double bonds to trans double bonds. Elaidic acid is a trans fatty acid with 18 carbon atoms and one trans double bond.

Essential fatty acids are fatty acids that cannot be synthesized by the body and must be obtained from the diet. Linoleic acid and alpha-linolenic acid are essential fatty acids.

The two main types of essential fatty acids are omega-3 and omega-6 fatty acids.