Hong Y-H, Lim G-O, Song K B
Dept. of Food Science and Technology, College of Agriculture and Life Sciences, Chungnam Natl. Univ., Daejeon, Republic of Korea.
J Food Sci. 2009 Jan-Feb;74(1):C6-C10. doi: 10.1111/j.1750-3841.2008.00987.x.
Edible Gelidium corneum-gelatin (GCG) blend films containing grapefruit seed extract (GFSE) or green tea extract (GTE) were manufactured, and the quality of pork loins packed with the film during storage was determined. Tensile strength (TS) and water vapor permeability (WVP) of the films containing GFSE or GTE were better than those of the control. The film's antimicrobial activity against Escherichia coli O157:H7 and Listeria monocytogenes increased with increasing antimicrobial concentration, resulting in a decrease in the populations of bacteria by 0.77 to 2.08 and 0.91 to 3.30 log CFU/g, respectively. Pork loin samples were inoculated with E. coli O157:H7 and L. monocytogenes. The samples packed with the GCG film containing GFSE (0.08%) or GTE (2.80%) had a decrease in the populations of E. coli O157:H7 and L. monocytogenes of 0.69 to 1.11 and 1.05 to 1.14 log CFU/g, respectively, compared to the control after 4 d of storage. The results showed that the quality of pork loins during storage could be improved by packaging them with the GCG film containing GFSE or GTE.
制备了含有葡萄柚籽提取物（GFSE）或绿茶提取物（GTE）的可食用石花菜 - 明胶（GCG）共混膜，并测定了用该膜包装的猪里脊肉在储存期间的品质。含有GFSE或GTE的膜的拉伸强度（TS）和水蒸气透过率（WVP）优于对照组。该膜对大肠杆菌O157:H7和单核细胞增生李斯特菌的抗菌活性随抗菌剂浓度的增加而增强，导致细菌数量分别减少0.77至2.08和0.91至3.30 log CFU/g。猪里脊肉样品接种了大肠杆菌O157:H7和单核细胞增生李斯特菌。与对照组相比，用含有0.08% GFSE或2.80% GTE的GCG膜包装的样品在储存4天后，大肠杆菌O157:H7和单核细胞增生李斯特菌的数量分别减少了0.69至1.11和1.05至1.14 log CFU/g。结果表明，用含有GFSE或GTE的GCG膜包装猪里脊肉可改善其储存期间的品质。
