Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 6

Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 6 -...

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Oleic acid, 18 carbons, most widely distributed fatty acid in nature. Saturated fatty acids contain the maximum possible hydrogen atoms. Palmitic acid, 16 carbon fatty acid, is a common saturated fatty acid. Fats high in saturated fat tend to be solid at room temperature because nonpolar molecules can develop transient regions of weak positive charge and weak negative charge. Some regions have a temporary excess of electrons, and others have a deficit of electrons. These slight opposite charges result in van deer Waals interactions between adjacent molecules. These interactions can occur in long hydrocarbon chains. Unsaturated fatty acids include on or more adjacent pairs of carbon atoms joined by a double bond. Fatty acid with one double bond are monosaturated fatty acids. Those with more than one are called polyunsaturated fatty acids. Fats containing high of each of
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Unformatted text preview: these fatty acids tend to be liquid at room temperature because each double bond produces a bend in the hydrocarbon chain that prevents it from aligning closely with an adjacent chain. This means less of van deer Waals interactions. Food manufacturers hydrogenate cooking oils by converting unsaturated fatty acids to saturated ones. This can make the double bonds to become rearranged, resulting in a trans configuration. These are unsaturated but mimic properties of saturated ones. These artifical fatty acids do not produce a bend so they are more solid. Linoleic acid and arachidonic acid are two important unsaturated fatty acids for essential nutrients. Phospholipids They belong to a group of lipids called amphipathic lipids, in which one end of each molecule is hydrophilic and the other end is hydrophobic. Each end differs physically and chemically....
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Ch 3 Carbon Atoms and Molecules Rutgers bio 101 pg 6 -...

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