The Composition, Antioxidant and Antibacterial Activities of Cold-Pressed and Distilled Essential Oils of Citrus paradisi and Citrus grandis (L.) Osbeck
Table 3
Inhibition zones of cold-pressed and distilled essential oils of C. paradisi and C. grandis.
Species
Inhibition zone of essential oils (mm)
C. paradisi
C. grandis
Streptomycin
Cold-pressed
Distilled
Cold-pressed
Distilled
10 mg/mL
20 mg/mL
10 mg/mL
20 mg/mL
10 mg/mL
20 mg/mL
10 mg/mL
20 mg/mL
10 μg/mL
P. aeruginosa
—#
6.9 ± 0.6
—
6.3 ± 0.6
—
7.9 ± 0.6
—
6.3 ± 0.6
18.4 ± 1.3
S. enterica subsp.
—
21.6 ± 1.0
—
10.7 ± 1.5
—
6.6 ± 1.0
—
20.6 ± 1.0
17.3 ± 1.2
E. coli
—
12.9 ± 1.5
—
10.6 ± 0.0
—
7.6 ± 1.0
9.3 ± 0.6
14.6 ± 1.0
17.6 ± 0.9
S. aureus
7.3 ± 1.5
13.6 ± 1.0
8.9 ± 2.1
12.3 ± 0.6
9.3 ± 1.2
8.9 ± 1.5
7.6 ± 1.0
13.6 ± 1.0
20.7 ± 0.9
S. faecalis
10.6 ± 1.0
17.3 ± 5.0
9.3 ± 0.6
17.3 ± 2.3
6.0 ± 0.6
8.9 ± 0.6
8.6 ± 2.6
17.3 ± 1.5
10.9 ± 1.2
Degree of inhibition: —: no inhibition zone (≦6 mm). Moderate inhibition zone (6–9 mm). Strong inhibition zone (10–14 mm). Very strong inhibition zone (>15 mm).
