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Example of an unsaturated fat triglyceride (C 55 H 98 O 6). Left part: glycerol; right part, from top to bottom: palmitic acid, oleic acid, alpha-linolenic acid. Glycerolipids are composed of mono-, di-, and tri-substituted glycerols, [30] the best-known being the fatty acid triesters of glycerol, called triglycerides. The word "triacylglycerol ...
Common Name Systematic Name Structural Formula Lipid Numbers Propionic acid: Propanoic acid CH 3 CH 2 COOH : C3:0 Butyric acid: Butanoic acid CH 3 (CH 2) 2 COOH : C4:0 Valeric acid
Lipids are amphiphilic: they have one end that is soluble in water ('polar') and an ending that is soluble in fat ('nonpolar'). By forming a double layer with the polar ends pointing outwards and the nonpolar ends pointing inwards membrane lipids can form a 'lipid bilayer' which keeps the watery interior of the cell separate from the watery ...
Fat has a food energy content of 38 kilojoules per gram (9 kilocalories per gram) proteins and carbohydrates 17 kJ/g (4 kcal/g). [2] Water makes up a large proportion of the total mass ingested as part of a normal diet but it does not provide any nutritional value.
Fatty acids that are required for good health but cannot be made in sufficient quantity from other substrates, and therefore must be obtained from food, are called essential fatty acids. There are two series of essential fatty acids: one has a double bond three carbon atoms away from the methyl end; the other has a double bond six carbon atoms ...
A lipoprotein is a biochemical assembly whose primary function is to transport hydrophobic lipid (also known as fat) molecules in water, as in blood plasma or other extracellular fluids. They consist of a triglyceride and cholesterol center, surrounded by a phospholipid outer shell, with the hydrophilic portions oriented outward toward the ...
Contrary to popular belief, they don't mean that all but 1% or 2% of the fat has been removed. Rather they refer to what percentage of the total weight is milk fat. For example, one cup of milk ...
This can be done in terms of the chemical elements present, or by molecular structure e.g., water, protein, fats (or lipids), hydroxyapatite (in bones), carbohydrates (such as glycogen and glucose) and DNA. In terms of tissue type, the body may be analyzed into water, fat, connective tissue, muscle, bone, etc.