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Introduction
Lipids are hydrophobic, nonpolar molelcules.
· They are soluble in nonpolar solvent.
· They are insoluble in polar solvents, such as water
They are isolated from the other biological molecules by
extracting them with nonpolar solvents.
*…read more

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Introduction
The types of lipids that we will look at include.
· Fatty Acids
· In the carboxylic acid family
· Waxes
· Fatty Acids + Alcohols
· Triglycerides
· 3 Fatty acids + glycerol
· Phospholipids and glycolipids
· 2 fatty acids + glycerol + phosphate + X
· Steroids
· Derivatives of cholesterol
· Eicosanoids
· Derivatives of the Fatty acid arachidonic acid
· Membranes
*
· Formed from phospholipids and glycolipids…read more

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Fatty Acids
Fatty acids contain a carboxylic acid group
· This should make them quite polar
However, they also contain a long hydrocarbon tail
· Which overall, makes them nonpolar.
nonpola pola
r r
*…read more

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Fatty Acids
Fatty acids typically contain between 12 and 20 carbons
· The number is usually always even.
· The nonpolar tails interact with London forces.
nonpola pola
r r
*…read more

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Fatty Acids
Melting points for saturated fatty acids:
Melting Temperature {°C}
No. of Carbons
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