From samples of red pepper powder sold in Korea were isolated and identified 13 species of molds (Aspergillus amstelodami, Asp. chcvalieri, Asp. clavatus, Asp. fiavus, Asp. janus var. effusus, Asp. oryzae, Asp, oryzae var. brevis, Asp. repers, Asp. sydowi, Asp. thomii, Asp. tubingensis, Penicillium thomii, Scopulariopsis bravicaulis) and 5 species of bacteria (Bacillus pumilus, Bac. subtilis, Micrococcus Luteus, M. varians, Staphylococcus aureus).
Radiosensitivity of these microorganisms was examined to give Dlo values of 14∼41 krad for molds, 11∼24 krad for bacterial vegetative cells and 190∼250 krad for bacterial spores. The red pepper powder was contaminated with 2∼3×10² mold counts/g and 3∼6×10^7 bacterial counts/g, which would be sufficiently destroyed by irradiating 200 krad γ-rays.
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