Susceptibility to spoilage by oxygen of fatty acids is determined by the number of double bonds in the acid's carbon chain. Molecular oxygen can attack these bonds and break the chain, forming ketones. Incidentally, naturally-occuring cis-double bonds are more susceptible than the artificial trans-fatty acids.
The number of double bonds.
Number of double bonds
There are several changes that occur that cause food spoilage. A loss of ph, spoilage caused by bacteria and decomposition are contributing factors to food spoilage.
Why rermentation a useful chemical reaction
food spoilage and green house
harmful effects of chemical changes are- -acid rain -rust -chemicals in an anti spot cream reacting with a silver necklace, turning it black -exhaust fumes -spoilage of foods -chemical fertilizers
You are probably referring to UHT milk. This is heat treated to kill the microbes which cause spoilage, so will only 'go off' when new microbes get in after it is unsealed.
Example: a block of cheese has grown moldy. This is chemical spoilage. A block of cheese falls on the floor. This is mechanical spoilage.
CHEMICAL CHANGE
by eating chemicals
Benzoic acid is added to prevent spoilage of cold drinks
preservative
There are several changes that occur that cause food spoilage. A loss of ph, spoilage caused by bacteria and decomposition are contributing factors to food spoilage.
There are enzymes that speed up the chemical reaction components in food which leads to spoilage. Enzymes can be slowed down so that food spoilage doesn't occur as quickly by keeping food in cold temperatures.
All food and drink have the bacteria in them already that begin to spoil or break down or decay the matter. Refrigeration or chemical additives merely slow down this natural timetable for decay.
food spoilage that is caused by bacteria is faster the warmer the food is. It is generally so that chemical reactions - which go on in bacterial systems - speed up as temperature rises. That is why we keep food in fridges and freezers.
Food spoilage is a chemical change because it is caused both by oxidation of fats and the chemical changes involved when fungi and bacteria use enzymes to use the food for its own development.
what are beer spoilage microoganisms
Spoilage inhibitors are chemicals added to commercially processed foods to prolong or prevent spoilage.