Effects of Electron-Beam Irradiation and Storage on Cholesterol Oxides Products of Beef Meat

전자선 조사와 저장기간이 우육의 콜레스테롤 산화물질에 미치는 영향

  • Lee, Jeong-Ill (Department of Animal Science & Technology, Seoul National University) ;
  • Min, Joong-Seok (Department of Animal Science & Technology, Seoul National University) ;
  • Kim, Il-Suk (Korea Meat Trade Association) ;
  • Park, Gu-Boo (Department of Animal Science, Gyeongsang National University) ;
  • Lee, Moo-Ha (Department of Animal Science & Technology, Seoul National University)
  • 이정일 (서울대학교 동물자원과학과) ;
  • 민중석 (서울대학교 동물자원과학과) ;
  • 김일석 (한국육류수출입협회) ;
  • 박구부 (경상대학교 축산학과) ;
  • 이무하 (서울대학교 동물자원과학과)
  • Published : 1998.12.01

Abstract

Some commercial beef loins in raw state were packaged with PVDC as aerobic and vacuum condition. The other beef samples were cooked until core temperature arrived at $70^{\circ}C$ and then packaged immediately in the same way as the raw state. These samples were irradiated by electron beam (0, 1, 2 kGy), and then stored in refrigerator $(2{\sim}4^{\circ}C)$. Identity and quantity of cholesterol oxides were analysed at the 0, 7th, 14th day of storage. In the samples that were raw and packaged aerobically, $7{\alpha}-hydroxycholesterol,\;{\beta}-epoxide,\;7{\beta}-hydroxycholesterol$ and 7-ketocholesterol were detected over $0.5\;{\mu}g/g$. Cholestanetriol and${\alpha}-epoxide$ were detected at levels below $0.5\;{\mu}g/g$ during storage. In the samples that were raw and vacuum-packaged, $7{\alpha}-hydroxycholesterol$, 7-ketocholesterol and cholestanetriol were detected. In the samples that were cooked and packaged aerobically, cholestanetriol and ${\alpha}-epoxide$ were detected below $0.5\;{\mu}g/g$ during storage. $7{\alpha}-hydroxycholesterol,\;{\beta}-epoxide,\;7{\beta}-hydroxycholesterol$and 7-ketocholesterol were detected as $1.53{\sim}26.81,\;1.07{\sim}5.23,\;40.64{\sim}101.30\;and\;7.16{\sim}33.91\;{\mu}g/g$, respectively. In all results, total amounts of cholesterol oxide increased significantly as irradiation dose and storage time increased (P<0.05).

Keywords

cholesterol oxides products;electron-beam irradiation