Slides in this set
The Nitrogen Cycle
bacteria convert N2 in air 1. Nitrogen-fixing
nitrates and ammonium bacteria convert
compounds into N2 in the air into
atmospheric nitrogen nitrates
5. Nitrifying 6. Nitrates
bacteria taken in by
Waste and ammonium
dead animals compounds
into nitrates Nitrates
in the soil
3. Decomposers break down 2. Plants are then
waste products and dead eaten by animals
animals and plants to form the nitrogen
AMMONIUM COMPOUNDS becomes PROTEIN…read more
What is glucose (food) used for?
1) Glucose (sugar) can be used to make long chains of starch...
2) Glucose can be used to make cellulose for sugars...
3) Glucose can be combined with nitrates to make proteins (for growth)...
molecules Proteins…read more
Why do we use additives?
Additive Interesting information
Flavour enhancers Improve the taste
Colour enhancers Make the food look more appealing
Preservatives Makes the food last longer
Vitamins and minerals Can be used to replace those lost during cooking
Sweetener Used to reduce the amount of sugar needed
Antioxidant Used to stop fats or oils reacting with oxygen
Emulsifier Used to mix ingredients like oil and water…read more
If artificial additives are "approved" they are given an E
E300E399 (antioxidants, acidity regulators)
E400E499 (thickeners, stabilizers, emulsifiers)
E500E599 (acidity regulators, anti-caking agents)
E600E699 (flavour enhancers)
E1000E1999 (additional chemicals)…read more