ISSN: 0973-7510
E-ISSN: 2581-690X
A high nitrite content ginger paste was found during the 26th Universiade. This study aimed to explore the reason behind this phenomenon. Kluyvera cryocrescens and Kluyvera ascorbata were isolated from the ginger paste. Both the two strains increased steadily if the pH was 5.0, 6.0 or 7.0. Under pH 4.0 conditions, strains reduced sharply. Compared these data we can find that the best pH for K.cryocrescens propagation was pH 6.0, and as for K.ascorbata was pH 5.0. Also Kluyvera strains can grow well if the NaCl concentration weas 0.5%, 1.0% or 2.0%, they not survival if the NaCl concentration reached 5%.The ginger paste provided suitable pH and temperature for Kluyvera propagation when it was stored at 8°C. Nitrite concentration in most of ginger slices sample reached a peak value when the bacterial concentration of Kluyvera reached 108 CFU/g. In this study, it is confirmed that Kluyvera played a major role in reducing nitrate to nitrite in the ginger paste.
Kluyvera cryocrescens, Kluyvera ascorbata, nitrite, ginger
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