Table 5.
Antimicrobial assessment of RSO.
|
Microorganisms |
Diameter of zone of inhibition (mm) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n-hexane |
Karnajora Rubber Garden, Sherpur |
Bhatera Rubber Garden, Moulavibazar |
Raojan Rubber Garden, Chattogram |
||||||||||
| Concentration (mg/mL) |
Concentration (mg/mL) |
Concentration (mg/mL) |
|||||||||||
| 500 | 250 | 125 | 62.5 | 500 | 250 | 125 | 62.5 | 500 | 250 | 125 | 62.5 | ||
| B. cereus | N | 5.5 ±2.75 |
9.67 ±0.92 |
11.0 ±0.5 |
9.83 ±0.16 |
8.17 ±0.16 |
8.5 ±0.28 |
9.83 ±0.60 |
9.16 ±0.16 |
N | 3.0 ±3 |
10.3 ±0.92 |
3.3 ±3.3 |
| B. megaterium | N | 5.17 ±2.58 |
9.17 ±0.16 |
9.83 ±0.88 |
9.67 ±0.66 |
5.0 ±2.5 |
6.67 ±3.38 |
7.0 ±3.51 |
6.0 ±3.0 |
N | 2.33 ±2.33 |
3.17 ±3.17 |
3.0 ±3.0 |
| B. subtilis | N | 4.83 ±2.42 |
11.17 ± 1.01 | 11.0 ±0.0 |
10.5 ±0.76 |
2.33 ±2.33 |
9.5 ±0.5 |
9.17 ±0.60 |
9.5 ±0.28 |
2.5 ±2.5 |
9.83 ±2.58 |
10.33 ± 0.33 | 10.67 ±0.66 |
| S. aureus | N | N | N | N | N | N | N | N | N | N | N | N | N |
| E. coli | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Salmonella sp. | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Shigella sp. | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Aspergillus flavus | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Aspergillus niger | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Penicillium notatum | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Candida albicans | N | N | N | N | N | N | N | N | N | N | N | N | N |
Values are means of triplicate determination (n = 3) ± standard error. N, no zone of inhibition was found.