Use of $gamma$ irradiation to prevent aflatoxin production in bread

Journal Article · Mon Jan 01 00:00:00 EST 1973 · J. Food Sci., v. 38, no. 7, pp. 1238-1240

OSTI ID:4393106

Bullerman, L B; Barnhart, H M; Hartung, T E

Irradiation doses of 100 and 200 Krad reduced the growth of Aspergillus parasiticus in bread stored for 10 days at 254DEC. With bread stored longer than 2 wk, mold growth in irradiated samples tended to approach the amount which occurred in the non-irradiated controls. Mold strain NRRL 3000 seemed slightly more sensitive to irradiation-than strain NRRL 2999. A 200 Krad dose prevented anatoxin production by either strain at both high and low levels of inoculation with spores in bread stored for 10 days, except in one case where a very low level of anatoxins was detected. At 100 Krad, bread inoculated with 102 spores/ slice contained none to low concentrations of anatoxins after storage for 10 days, but with 106 spores/slice higher amounts of toxins were detected. When ihe inoculated bread was stored for periods up to 6 wk, the 200 Krad treatment prevented aflatoxin production in all bread samples containing 10/sup 2/ spores/ slice, and in almost all samples containing 10/sup 6/ spores/ slice. The 100 Krad treatment also prevented aflatoxin production during 6 wk of storage in bread that contained 10/sup 2/ spores/ slice. However, with 10/sup 6/ spores/ slice both strains were capable of producing very high amounts of aflatoxins after irradiation nt 100 Krad. At 1, 2 and 6 wk of storage, these amounts were greater than the unirradiated controls, suggesting possible stimulation of aflatoxin production. (auth)

• Research Organization: Univ. of Nebraska, Lincoln
• NSA Number: NSA-29-010364
• OSTI ID: 4393106
• Journal Information: J. Food Sci., v. 38, no. 7, pp. 1238-1240, Other Information: Orig. Receipt Date: 30-JUN-74
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

N47321* -Isotope & Radiation Source Technology-Radiation Sources-Industrial Uses-Food Processing
N48320 -Life Sciences-Radiation Effects on Microorganisms-Food Preservation
*AFLATOXIN- BIOSYNTHESIS
*BREAD- RADIOPRESERVATION
*FUNGI- RADIOSTERILIZATION
BIOLOGICAL RADIATION EFFECTS
GAMMA RADIATION
PHOTON BEAMS
PRESERVATION
RADIATION DOSES
RADIOSENSITIVITY
RADIOSENSITIVITY EFFECTS
RADIOSTERILIZATION
RESPONSE MODIFYING FACTORS
SPORES
STERILIZATION
STORAGE LIFE RADIOPRESERVATION