Inhibitory Effects of Chitosanascorbate on Growth of Staphylococcus aureus and Escherichia coli Contaminated in Flounder during Storage
참가자미의 저장 중 오염미생물(total aerobacter, Staphylococcus aureus, E. coli)의 생육에 미치는 0.1% chitosan-ascorbate (CA) 의 영향을 조사하였다. 참가자미는 아가미를 제거한것(OG)과 제거하지 않은 것(WG), 건조도를 0%(0 D), 20% 건조(20 D), 40% 건조(40 D)로 구분하였으며 처리 후 진공 포장하여 에서 10일간 저장하였다. 저장중 총호기성 균수(log CFU/
We performed an experiment of keeping the extension of raw and semi-dried flounder (Pleuronectes herzensteini). The effect of with (WG) or without gill (OG), drying degree (20% drying: 20D, 40% drying: 40D) and storage temperature() and 0.1% chitosan-ascorbate (CA) treatment of vacuum packaging flounder on the growth of contaminated microorganism during storage for 10 days were investigated. Total aerobacter (TA) in the OG-treated raw flounder was log cycle lower than that of WG-treated flounder. Also, the number of Staphylococcus aureus (SA) and E. coli (EO) in OG were lower compared with WG. The number of TA, SA and EO in 20 D among 0 D, 20 D and 40 D stored at were lowest. Especially, the SA and EO was , 0.3-0.88, and 0.13-0.74 log cycle lower compared with raw flounder. The growth of TA, SA and EO separated from raw flounder in tryptic soy broth were completely inhibited by 0.1% CA. The anti-biotical effect of CA of two microorganisms SA and EO that separated from flounder, and the growth of all of them were 90% (SA), 96% (EO) inhibited at the 0.1% CA. The inhibition times at in soy broth was 36 hr. However when CA was added directly to flounder, it appeared inhibition effect to 0.88 log cycle. The effect of CA was better when gills removed and 20% drying.