classification of fats by group characteristics
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what are the 7 groups of fats
milkfat group lauric acid group oleic-linoleic group linolenic group animal fat depot group marine oil group erucic acid group
what are some distinguished features of milkfat group
high levels of long chain sat fatty acids, unique and substencial portion of short chain
what is the fatty acid composition for cow’s milk fat
25-32% palmitic acid 10-12% stearic acid 30-40% oleic acid 4-15% butyric acid
what distinguish lauric acid group
by their content of lauric acid (C12) which can count for 40-50% of the total fatty acid and most of the fatty acids are saturated
lauric acid are more oil or fats in room temp
oils in the lauric acid group are resistant to oxidative rancidity due to their low degree of unsaturation
which group is the Most interest
oleic-linoleic
what % of saturated fatty acids make up oleic and linoleic acid
20%
linolenic acid is particularly reactive and readily oxidized?
true
what is a reversion
relatively rapid transition from a bland, tasteless oil shortly after processing to grassy, hay like and then fishy flavour
what are some caracteristics of animal fat depot group, for example their melting point and their structure
they have a high melting point and they are made with: 50-60% oleic and linoleic acid 3–40% palmitic and stearic acid
marine oil group contains which type of fatty acid
high long chain unsaturated fatty acids C16-C22
uricic acid group - give an example of the oil and it is good or not good to our health
Rapeseed oil it is not good, it contains 40-50% of erucic acid which is considered a health hazard