Chemiluminescence of cereal products III. Two-dimensional photocount imaging of chemiluminescence.
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 system--an intensified 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 significantly to the observed chemiluminescence. The possible involvement of hydrophilic interactions, H2O-biopolymers and recombination of trapped radicals is also discussed.
Słtawinska
D
D
Department of Physics, Agricultural University, Poznań, Wojska Polskiego, Poland. Slawinsk@sol.put.poznan.pl
Słtawinski
J
J
D001704:Biopolymers / Q000737:chemistry; D001939:Bread / Q000032:analysis; D002523:Edible Grain / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry; D008163:Luminescent Measurements; D010084:Oxidation-Reduction; D010777:Photochemistry; D017785:Photons; D012434:Secale / Q000737:chemistry; D013057:Spectrum Analysis; D014908:Triticum / Q000737:chemistry; D014867:Water / Q000737:chemistry
D001704:Biopolymers; D016166:Free Radical Scavengers; D014867:Water