Physical properties of Gelidium corneum-gelatin blend films containing grapefruit seed extract or green tea extract and its application in the packaging of pork loins.
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.
Hong
Y-H
YH
Dept. of Food Science and Technology, College of Agriculture and Life Sciences, Chungnam Natl. Univ., Daejeon, Republic of Korea.
Lim
G-O
GO
Song
K B
KB
D000818:Animals; D032083:Citrus paradisi / Q000737:chemistry*; D015169:Colony Count, Microbial; D003257:Consumer Product Safety; D004305:Dose-Response Relationship, Drug; D019453:Escherichia coli O157 / Q000254:growth & development; D005506:Food Contamination / Q000517:prevention & control; D018857:Food Packaging / Q000379:methods*; D005519:Food Preservation / Q000379:methods; D005520:Food Preservatives / Q000494:pharmacology*; D005780:Gelatin / Q000494:pharmacology*; D006801:Humans; D008089:Listeria monocytogenes / Q000254:growth & development; D008460:Meat / Q000592:standards; D010936:Plant Extracts / Q000494:pharmacology*; D000461:Rhodophyta / Q000737:chemistry*; D013552:Swine; D013662:Tea / Q000737:chemistry*; D013718:Tensile Strength; D013997:Time Factors
D005520:Food Preservatives; D010936:Plant Extracts; D013662:Tea; C015233:gelatin film; D005780:Gelatin