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Chemiluminescence of cereal products. III. Two-dimensional photocount imaging of chemiluminescence

✍ Scribed by Sławinska, Danuta ;Sławinski, Janusz

Publisher
John Wiley and Sons
Year
1998
Weight
410 KB
Volume
13
Category
Article
ISSN
0884-3996

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✦ Synopsis

Two-dimensional (2-D) spatial distributions of ultra-weak chemiluminescence (photon imaging) from auto-oxidizing and water-hydrated cereal food products were measured by means of a high-sensitivity 2-D photon counting systemÐan intensi®ed charge coupled device (CCD) camera. The 2-D images obtained reveal the dynamics and emission patterns of very slow auto-oxidation reactions and much faster processes of water penetration into cereal products. The enhancement of chemiluminescence by the addition of water appears to involve complex processes with an inhomogenous spatial and energy distribution within cereal products. The effect of antioxidants, free radical promoters and scavengers suggests that oxidative radical reactions contribute signi®cantly to the observed chemiluminescence. The possible involvement of hydrophilic interactions, H 2 O-biopolymers and recombination of trapped radicals is also discussed.

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