Plant Oils Flashcards
Describe why vegetable oils are important in foods…
Provide a lot of energy and have a very high energy content. Nutrients in vegetable oils from seeds contain vitamin E. And fatty acids for many metabolic processes.
What bond does unsaturated oils contain?
C=C double bond
What happens with unsaturated oil in bromine water?
Unsaturated oil will decolourise bromine water (as the bromine opens up the double bond joins on).
What are monounsaturated fats?
Monounsaturated fats contain one C=C double bond somewhere in their carbon chains. Polyunsaturated fats contain more than one C=C double bond.
What is hydration?
A reaction with water/ steam.
How is ethanol made by fermentation?
Fermentation is used to produce ethanol from sugar by: dissolving the sugar in water, adding yeast to the sugar solution then leaving the mixture for 3 days.
Suggest how the solid waste yeast is removed and how ethanol is obtained from the solution…
By using a filter or decant to remove the yeast.
