A STUDY OF THE EFFECTS OF SUB-STERILIZATION DOSES OF RADIATION ON THE STORAGE LIFE EXTENSION OF SOFT-SHELLED CLAMS AND HADDOCK FILLETS. Quarterly Progress Report No. 2, August-October 1962

Technical Report · Thu Oct 31 04:00:00 EST 1963

OSTI ID:4761458

Nickerson, J T.R.; Goldblith, S A

Triangle difference tests were used to establish a starting storage dose level for haddock fillets and soft-shelled shucked clams. The highest storage dose levels were established as 400,000 rad for haddock fillets to be prepared by steaming, 800,000 rad for haddock fillets to be prepared by deep fat frying, and 800,000 rad for soft-shelled shucked clams to be prepared by deep fat frying. No tests by other methods of cooking were included for shucked clams since they are ordinariiy used oniy for frying. Acceptability tests employing the nine-point hedonic scale are being carried out three times after irradiation: immediately post-irradiation, at an intermediate storage time, and at a time near the limit of storage (time of storage determined by an aerobic-facultative count of 1 x 10/ sup 6/ bacteria per gram and the limit of stornge at some period beyond this). Organoleptic and microbiological tests are being carried out on samples canned under aerobic conditions and under a vacuum of 25 in. of Hg, and stored at temperatures of 43 to 46 deg F and 32 to 33 deg F. For haddock irradiated at 200,000 rad (canned with and without vacuum) and held 7 days at 43 to 46 deg F bacterial counts have been found to be over 1 x 10/sup 6/ per gram. After this period organoleptic tests on the air packed product (fried product) showed no significant difference from the control (frozen) while the vacuum packed product was significantly different from the control (frozen). For haddock irradiated at 200,000 rad (canned with and without vacuum) and held 14 days at 32 to 33 deg F bacterial counts were less than 1 x 10/sup 6/ per gram. Orgamoleptic tests indicated that air packed samples were not significantly different from the controls but vacuum packed samples were significantly different from controls after 14 days storage at the temperatures indicated. (auth)

• Research Organization: Massachusetts Inst. of Tech., Cambridge
• NSA Number: NSA-17-003258
• OSTI ID: 4761458
• Report Number(s): NYO-10411
• Country of Publication: United States
• Language: English

Related Subjects

BACTERIA
CONFIGURATION
CONTROL
EARTH
FISH
GAMMA RADIATION
INDUSTRIAL APPLICATIONS OF ISOTOPES AND RADIATIONS
INSTRUMENTS
IRRADIATION
LOW TEMPERATURE
MINING
OPERATION
PACKAGING
PERFORMANCE
PRESERVATION
RADIATION DETECTORS
RADIATION DOSES
RADIATION SOURCES
SHIELDING
STORAGE
TEMPERATURE
TESTING
VACUUM
WELL LOGGING