This study aimed to compare the efficacy in reducing the number of Escherichia coli and bacteria on lettuce extract Chamuang. Vine extract light vinegar and potassium permanganate. In preliminary tests, it has to create conditions contaminated with E.coli bacteria on lettuce before. Then test the effectiveness in reducing the number infected with E.coli Spread Plate Technique on agar Eosin Methylene Blue (EMB) Agar This study found. Extract Chamuang 15% effective in reducing the number of E.coli infection have reduced the number of E.coli bacteria from creating conditions in contaminated lettuce has more potassium permanganate. Vinegar and significant at a confidence level of 95%, while reducing the amount of light extracted from the vine E.coli infection was minimal. Then extract Chamuang at concentrations of 5%, 10% and 15% compared with the vinegar, 1% were tested for efficacy in reducing the number of bacteria in contaminated lettuce found that extracts Chamuang. at concentrations of 15% and 1% acetic acid can reduce the number of bacteria on lettuce extract more than 10% Chamuang significant at a confidence level of 95%, while the extract Chamuang. 5%
effective in reducing the number of bacteria were minimal. Therefore, it should be studied to develop the extract is washed vegetables Chamuang 15% effective next.
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