Process for monitoring time-temperature histories of perishables

Details Process for monitoring time-temperature histories of perishables Process for monitoring time-temperature histories of perishables

1978-08-30

1980-06-17

Serwin, R. E.

Chemistry: physical processes

Physical processes

Crystallization

422 56, 422 58, 116201, 116207, G01N 2106

Patent

active

042081866

ABSTRACT:
An improved process and device are described, for monitoring time-temperature histories of perishable articles, utilizing an inactive form of a diacetylene compound, incapable of undergoing a color change upon thermal annealing, but capable of conversion to an active form upon contacting an activating vapor. The active form is capable of undergoing a color change upon thermal annealing, as a result of solid state polymerization wherein the resulting color change is representative of the time-temperature history of thermal annealing. Specific active and inactive forms of diacetylenes useful in the improved process and device are also described.

REFERENCES:
patent: 3501297 (1970-03-01), Cremeans
patent: 3981683 (1976-09-01), Larssen
patent: 3999946 (1976-12-01), Patel
patent: 4042336 (1977-08-01), Larssen
Wegner, Zeit, fur Naturforschung V. 24b, pp. 824-834 (1969).
Mayerle et al., Acta Cryst B. 34, pp. 143-147 (1978).

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