Lipid hydrolysis can also be referred to as lipid breakdown or lipolysis.
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The general equation for the hydrolysis of a lipid molecule is: Lipid + water → fatty acid(s) + glycerol
The most common members of the 'lipid family' are triglycerides: plant oil and fats, being 3-fold esters of three molecules of alkanoic (or alk-ene-oic) acids with one molecule of glycerol (1,2,3-propan-tri-ol). When hydrolysed these reactant are freed by de-esterfication called hydrolysis. (Other members of the lipid group are cholesterols, waxes, detergents are differently constituted, but most of them can also be hydrolysed).
The reactant for lipase is a lipid molecule, such as a triglyceride. Lipase is an enzyme that breaks down lipids into fatty acids and glycerol through a hydrolysis reaction.
The term for a type of lipid that has one double bond between two of its carbon molecules is called a monounsaturated fat.
The hydrolysis of fat is called saponification because it involves the reaction of a fat (triglyceride) with a strong base (usually alkali) to form soap. The term "saponification" comes from the Latin word "sapo," which means soap.