Abstract
This study was carried out to determine the bactericidal effect of the sakae naa’s seed extract. The experiment selected concentrations of 17, 20, 23 and 26 mL/L of seed extract per liter of water to assess resistance on Vibrio parahaemolyticus, and BKC chemical (concentration of 0.5 mg/L) was chosen control treatments. The results showed that the killing ability on V. parahaemolyticus of the extract from sakae naa’s seed has gradually increased with the rising-concentration and the period of 2-10 hours after using. At a concentration of 26 mL/L, the extract of seeds gave the highest abilities to kill V. parahaemolyticus (93.8%) at 2 hours and 95.9% at 10 hours after using. In contrast, killing abilities on V. parahaemolyticus of BCK were highest at 2 hours after using (96.1%) and gradually decreased by time to time. The extracts from the seeds of sakae naa (at 26 mL/L of concentration) gave the killing ability on V. parahaemolyticus was equivalent to those of BKC at 0.5 mg/L of concentration.
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