What do you mean by “Tyndallisation” and “Pasteurisation”. State the methods of pasteurisation.

What do you mean by “Tyndallisation” and “Pasteurisation”. State the methods of pasteurisation.
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Answer :

Tyndallisation : This is a fractional sterilization method. This method is used for sterilization of medicaments unstable at 1150C but able to withstand low temperature heating. This method consist of heating the material at 800C or 100 0C for 1 hour on three successive days presuming that on the first day all vegetative bacterial cells will be destroyed and the spores may germinate in the days to follow and will be killed subsequently.


Pasteurization:  It is a partial sterilization method which is used to make milk safe and also to improve its keeping properties. The process kills only 97 to 99 percent micro-organisms, but it does not kill bacterial spores

Methods of pasteurisation are as follows:  

Low Temperature Long Time (LTLT)

High Temperature Short Time (HTST)

Vat pasteurization

Ultra High Temperature(UHT)

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