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- W2408957182 abstract "Vibrio parahaemolyticus ATCC 27519 was chosen as indicator of aquacultural pathogenic bacteria to determine the antibacterial activity and mechanism of copper-bearing montmorillonite (Cu-MMT) in vitro. The results indicated that montmorillonite (MMT) had no antibacterial activity. The minimum inhibitory concentration (MIC) and bactericidal concentration (MBC) of Cu-MMT on Vibrio parahaemolyticus were 75 and 300 mg/L, respectively. The activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and lactate dehydrogenase (LDH) of bacteria were examined and the results showed treatment with Cu-MMT could lead to significant release of intracellular enzymes from the tested bacteria suggesting that the permeability of the cell membrane increased and bacteria suffered injury. Three typical inhibitors (malonic acid, iodine acetic acid and phosphate sodium) were used to further study the inhibitory pathways of respiratory metabolism. Cu-MMT effectively inhibited respiratory metabolism of Vibrio parahaemolyticus, with the respiratory inhibition percent (I(R)) of 31.8%. The respiratory superposing inhibition percent after addition of phosphate sodium, iodine acetic acid and malonic acid was 48.6%, 27.8% and 17.5%, respectively. These results indicated that the effect of malonic acid on superposing inhibition percent of Cu-MMT for bacteria is the lowest; thus, the synergic action between Cu-MMT and malonic acid is the weakest, indicating that they inhibited the same pathway of respiratory metabolism, i.e. the TCA pathway, which is the most important pathway of carbohydrate metabolism. The atomic force microscope image of Vibrio parahaemolyticus exposed to Cu-MMT showed that Cu-MMT could rupture the bacterial cell membrane." @default.
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- W2408957182 date "2006-06-01" @default.
- W2408957182 modified "2023-09-25" @default.
- W2408957182 title "[Study on the antibacterial mechanisms of copper-bearing montmorillonite]." @default.
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