Lipids
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Transcript of Lipids
DAVID ADAIR FERNÁNDEZ MORGAN
ASAEL MIGUEL LÓPEZ
OMAR JIMÉNEZ COCA
ISRAEL FERNÁNDEZ DOMÍNGUEZ
Lipids
WHAT ARE THEY?
•Water insoluble compunds usually composed of an
alcohol and one or more carboxylic acid molecules.
•They include: Animal fats, vegetable oils and waxes.
Fats and oils are esters of glycerol, an alcohol that
contains 3 (OH) Groups.
Each molecule of a fat or an oil contain three ester groups resulting
from the 3 carboxylic acid molecules joined to one glycerol
molecule.
FUNCTIONS OF LIPIDS!
•They have two major biochemycal roles in the
body:
•Store excess energy when an organism
porcesses more food than it needs.
•Form membranes surronding cells and
components
Clasification of lipids
• Lipids are divided in two groups:
Simple lipids Complex lipids
Phospholipids Vegetable oils
Glucolipids Waxes
Esteroids Fats
Cromolipids
PHOSPHOLIPIDS
• Glyceride found in living cells and cell membranes. They have two fatty acids esterified to glycerol. has an ionic “head” soluble in water, and a “tail” that is insoluble.
GLUCOLIPIDS
• Components formed by a carbohydrate that can be glucose or galactose, and a fatty acid and an alcohol. Other words lipids that contain D-glucose.
STEROIDS
• A lipid with a four-ring structure. Include cholesterol, sex hormones, vitamine D and bile salts.
OILS AND FATS
• Contain fatty acids, fats have small percentage of unsaturated fatty acids, oils contain few saturated fatty acids.
• A liquid lipid obtained from a plant source its called an oil.
• A semisolid lipid obtained from an animal source is called a fat.
• The distinction of a fat and an oil is based on the saturation of the fatty acids.
WAXES
•Obtained from heavy crude oil. Its a mixture of a long chain alkanes. A lipid wax is a mixture of naturally ocurring esters of fatty acids and long chains alcohols.
INTERNET REFERENCES
• http://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/lipids.htm
• http://www.chem4kids.com/files/bio_lipids.html