Studies on the Preservation of Pork Sausage by Gamma Radiation -Part 1. On the Enhancement of the Preservative Effect of Antiseptics by Gamma Radiation-

감마선 조사에 의한 Pork Sausage의 저장에 관한 연구 -제 1 보 방부제와 방사선과의 상승효과에 대하여-

This experiment was conducted to investigate the combined effects of radiation and antiseptics on the keeping qualities of pork sausage, which was treated with potassium sorbate and AF-2(2-(-2-furyl)-3-(5-nitro-2-furyl)-acrylamide), and then followed by gamma radiation of 0.25, 0.5, and 0.75 Mrad. Amounts of treated antiseptics were a quarter, half, and full levels of their maximum permissible concentration. Irradiated and unirradiated sausages were stored for 50 days at $5^{\circ}C\;and\;25^{\circ}C$, and their changes in rancidity, volatile basic nitrogen, bacterial counts, pH, and sensory analysis were examined during the storage period. The results obtained are as follows: 1) Preservative effects of antiseptics were manifested at cold storage; antiseptics treatment of a quarter-level and unirradiation following low-temperature storage showed the same good keeping qualities as the combined treatment of full-level antiseptics and radiation of 0.25 Mrad following high-temperature storage. 2) There did not appear to recognize irradiation-odor, while color and odor were deteriorated intensively by storage temperature. Sausage irradiated with 0.75 Mrad has shown slightly noticeable off-odor at the end of storage at $25^{\circ}C$. 3) The most suitable radiation dose was considered to be 0.5 Mrad, which could extend the storage life about $2{\sim}3$ times longer than untreated.

방부제와 방사선조사와의 상승효과가 pork sausage의 저장성 및 그 품질에 미치는 영향을 조사하기 위해 AF-2와 potassium sorbate를 법정허용량의 전량, ${\frac{1}{2}},\;{\frac{1}{4}}$, 및 무첨가로 하고 0.25, 0.5, 0.75 Mrad별로 조사시킨 후 $5^{\circ}C와 $25^{\circ}C$에서 저장했다. 저장중 산패도 휘발성염기질소, 세균수, 및 pH의 변화를 측정하고 관능검사를 실시했다. 실험한 결과는 다음과 같다. 1) 방부제의 보존효과는 저온저장의 유익성을 보여 $5^{\circ}C$에서 저장한 ${\frac{1}{4}}$첨가 무조사구가 $25^{\circ}C$에서 저장한 전량첨가 0.25Mrad 조사구와 비등한 저장성을 보였다. 2) 조사취는 거의 인정할 수 없었으며 $25^{\circ}C$에서 저장한 0.75Mrad 조사구가 약간의 산패취를 보였다. 색택과 풍미는 저장온도에 따라 격심한 차이를 보였다. 3) 적정선량은 0.5Mrad로 인정되었으며 대조구보다 약 $2{\sim}3$배의 저장기간을 연장시켰다.