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화분발효물을 함유한 Gelidium corneum - 젤라틴 혼합필름의 항균활성과 돈육의 포장재 적용
홍윤희,임금옥,송경빈,Hong, Yun-Hee,Lim, Geum-Ok,Song, Kyung-Bin 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.3
Gelidium corneum - gelatin (GCG) blend films containing fermented pollen extract (FPE) were prepared and used as a packaging material of pork loins. Water vapor permeability (WVP) of the film containing FPE was better than the control film, and the film's antimicrobial activity against Escherichia coli O157:H7 and Listeria monocytogenes increased with increasing FPE concentration. Addition of 0.15% FPE decreased the populations of Escherichia coli O157:H7 and Listeria monocytogenes by 2.98 and 3.68 Log CFU/g, respectively, compared to the control. Pork loin samples were inoculated with E. coli O157:H7 and L. monocytogenes and packed with the film. The samples packed with the GCG film containing 0.15% FPE had a decrease in the populations of E. coli O157:H7 and L. monocytogenes by 1.49 and 1.01 Log CFU/g after 4 d of storage, respectively, compared to the control. The results suggested that shelf life of the pork loins could be extended by packaging with the GCG film containing 0.15% FPE.
다양한 가소제와 Ferulic Acid 처리한 Gelidium corneum 필름의 물성
임금옥(Geum Ok Lim),홍윤희(Yun Hee Hong),송경빈(Kyung Bin Song) 한국식품영양과학회 2009 한국식품영양과학회지 Vol.38 No.6
다양한 가소제와 ferulic acid를 첨가한 GC 필름의 물성을 측정하였다. Glycerol, sorbitol, fructose, sucrose, PPG를 첨가한 필름의 WVP는 1.30~1.60 ng m/㎡sPa 범위를 나타내었는데, 가소제의 종류에 따라 값의 차이를 나타내었으며 sucrose를 첨가한 필름이 가장 낮은 WVP를 나타내었다. 필름의 TS와 %E는 각각 1.29~11.29 ㎫, 5.55~36.44%의 범위를 나타내었다. GC 필름에 가교제인 ferulic acid를 첨가하여 필름의 물성을 측정하였을 경우 WVP가 개선됨을 확인할 수 있었는데, 30 ㎎ ferulic acid 첨가 시 가장 낮은 WVP를 나타내었다. 10 ㎎ ferulic acid를 필름에 첨가하였을 때 대조구에 비해 매우 높은 TS를 나타내었지만 ferulic acid의 첨가량이 그 이상 증가함에 따라 TS는 감소하는 경향을 나타내어 ferulic acid를 10 ㎎ 첨가하는 것이 가장 최적의 농도라고 판단된다. Effects of various plasticizers (1.5%) such as glycerol, sorbitol, fructose, sucrose, and polypropylene glycol, and ferulic acid on the physical properties of Gelidium corneum (GC) film were examined. GC films containing plasticizer and ferulic acid were prepared by incorporating various amounts (10, 30, 50, 70, 100 ㎎/100 mL) of ferulic acid into the film. Water vapor permeability (WVP) of the GC film varied depending on the type of plasticizer, and among them the film containing sucrose had the lowest WVP. Tensile strength (TS) and % elongation (%E) of the film were in the range of 1.29~11.29 ㎫ and 5.55~36.44 %, respectively, and the WVP values were of 1.30~1.60 ng m/㎡sPa. In addition, the GC films were prepared using ferulic acid as a cross-linking agent. WVP of the film decreased with the addition of ferulic acid, and the film containing 30 ㎎ ferulic acid had the lowest WVP value. TS value of the GC film containing 10 ㎎ of ferulic acid was significantly higher than that of the control. However, further increase of ferulic acid concentration decreased the TS value. Therefore, 10 ㎎ of ferulic acid was determined to be the optimal concentration for the film.