Details

Autor(en) / Beteiligte

• No, K.H
• Park, N.Y
• Lee, S.H
• Hwang, H.J
• Meyers, S.P

Titel

Antibacterial Activities of Chitosans and Chitosan Oligomers with Different Molecular Weights on Spoilage Bacteria Isolated from Tofu

Ist Teil von

• Journal of food science, 2002-05, Vol.67 (4), p.1511-1514

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2002

Quelle

Wiley-Blackwell Full Collection

Beschreibungen/Notizen

• Seven bacteria were isolated from spoiled tofu and identified as Bacillus sp. (S08), B. megaterium (S10), B. cereus (S17, S27, S28, S32), and Enterobacter sakazakii (S35). In a paper disc test with 6 chitosans and 6 chitosan oligomers of different molecular weights, chitosans showed higher antimicrobial activity than did chitosan oligomers at a 0.1% concentration. Results of inhibitory effects of 6 chitosans on growth of Bacillus sp. (S08) failed to detect viable cells after incubation for 24 hrs at 37 C, even at 0.02% concentration. With B. megaterium (S10) and B. cereus (S27), a 3 to 4 log cycle reduction was found in the chitosan-treated group. The growth of Enterobacter sakazakii (S35) was completely suppressed in the presence of 0.04% chitosan except for 1 chitosan product. The minimum inhibitory concentration of chitosan differed with products and isolates, ranging from 0.005% to above 0.1%.