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Most everyone knows that oil (lipids) and water do not mix. However, in
many foods, lipids and water need to be mixed and stay mixed to produce
the desired food systems. Examples of such food systems include salad
dressings, butter, and mayonnaise. Emulsifiers are molecules that contain
both a hydrophilic (water loving) and hydrophobic (water hating) portion.
These molecules are extensively used in commercial food products to
keep lipids and water mixed. Students will be able to describe the structure and function of an emulsifier molecule and to identify various classes of emulsifiers.