Table 1.

Dissolution conditions for agents used in this study

Agent	Dissolution
Chloramphenicol	Dissolved in absolute ethanol, then diluted with distilled water to maintain a stock concentration of 1000 µg ml−1
Ciprofloxacin	Dissolved by glacial acetic acid, then diluted with distilled water to maintain a stock concentration of 1000 µg ml−1
Linezolid	Dissolved in distilled water
Norfloxacin	Dissolved by glacial acetic acid, then diluted with distilled water to maintain a stock concentration of 1000 µg ml−1
Oxacillin	Dissolved in distilled water
Rifampicin	Dissolved in methanol, then diluted with distilled water to maintain a stock concentration of 1000 µg ml−1
Tetracycline	Dissolved in methanol, then diluted with distilled water to maintain a stock concentration of 1000 µg ml−1
Vancomycin	Dissolved in distilled water
Nicotinamide	Dissolved in distilled water
Ascorbic acid	Dissolved in distilled water