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exposure to a temperature of 100°C (flowing steam) for a definite period, usually an hour, on each of several days; at each heating the developed bacteria are destroyed; spores, which are unaffected, germinate during the intervening periods and are subsequently destroyed.
fractional sterilizationAn obsolete type of sterilisation described by J Tyndall (1820–1893) in which spore-forming bacteria in various stages of the cell cycle were destroyed by intermittent (e.g., one hour per day) steam sterilisation.
Sterilization in which heating is done at intervals so that spores can develop into vegetative bacteria and be destroyed.Synonym: intermittent sterilization
See also: sterilization
Tyndall,John, English physicist, 1820-1893.
Tyndall effect - Synonym(s): Tyndall phenomenon
Tyndall light - light that is reflected by gas- or liquid-suspended particles.
Tyndall phenomenon - the visibility of floating particles in gases or liquids when illuminated by a ray of sunlight and viewed at right angles to the illuminating ray. Synonym(s): Tyndall effect
tyndallization - exposure to a temperature of 100°C (flowing steam) for a definite period, usually an hour, on each of several days. Synonym(s): fractional sterilization