Time-temperature indicator for establishing lethality of high te

Details Time-temperature indicator for establishing lethality of high te Time-temperature indicator for establishing lethality of high te

1994-03-16

1996-06-25

Yeung, George

Chemistry: molecular biology and microbiology

Apparatus

Including measuring or testing

116207, 374102, 422 58, 426 88, 426233, 435 31, 4352881, C12Q 100, G01D 2100, G01N 3100

Patent

active

055299318

ABSTRACT:
There is presented an indicator capsule for determining temperature and t exposure required for food processing comprising a cylindrical tube having a closed end and an open end, a cap for connection to and removal from the open end to close and open the tube, and a solution in the tube which is reactive to accumulated temperature and time exposure to fluoresce proportionally to the accumulated temperature and time exposure. There is further presented an indicator system for determining temperature and time exposure required for food processing including the above capsule, a pipetting device for removing the solution from the capsule, and a spectrofluorometer for indicating the fluorescence of the solution. There is still further presented an indicator capsule wherein the solution comprises bacterial spores; a system including the capsule, a pipetting device, and an agar plate for providing a count of the surviving spores to, in turn, provide an indication of the aggregate thermal effect on the solution.

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Davis et al. Microbiology (Third Edition) Harper & Row (1980) p. 63.

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