Plant Oils (core) Flashcards
What two methods are used to extract vegetable oil?
Pressing and steam distillation
Why are vegetable oils important in foods?
the provide energy and nutrients
Why are some vegetable oils described as unsaturated?
they have carbon carbon double bonds
Why are many of the foods from fast food outlets cooked in oil?
it is faster
What is meant by hardening vegetable oils?
reacting with hydrogen, passed over a nickel catalyst at 60 degrees
How can you recognise an emulsion?
they are opaque and thicker
What is an emulsifier?
substance that makes oil and water mix
Give one advantage of eating foods that contain vegetable oils?
they have unsaturated fats which are better for your health
Give one disadvantage of eating foods that contain vegetable oils?
when hardened they contain saturated fats which are linked to heart disease
Why should you be aware of emulsifiers in the food you eat?
they are high in fat
Why do we harden vegetable oils?
so they are solid at room temperature
