Have you tried a dictionary ? Like dictionary.com ? If you can't find it there, then are you sure it's even a word ?
Pasteurisation does not kill all bacteria in the milk. Some bacteria are not killed in the heating process and will start to multiply again after pasteurisation. Cooling after pasteurisation is needed in order to limit the amount of bacterial growth that occurs. Bacteria reproduce very slowly in cold conditions, but very quickly in hot conditions. Cooling is the only preservative that is used after pasteurisation.
1864
PASTEURISATION
There is none
louis pastuer
louis pasteur
Milk
yes
he discovered pasteurisation
Yes
pasteurization
None, other than the cost