Antimicrobial Fatty Acids from Green Alga Ulva rigida (Chlorophyta)

Table 6

Antibacterial activity against S. aureus ATCC 25923 of sub-fractions obtained from G4, G5, and G6 of U. rigida (Ghar El Melh).

Sub-fractions obtained by TLCp or LH20		Diametre (mm)	MIC (μg/ml)
G4 (4)		17.3±0.5	20
G5 (5)		17.6±0.5	40
G6 (2)		18±0.5	20
B4		20.3±0.5	20
A		16.6±0.5	10
B		13±0	40
C		20.6±0.5	10
D		24.3±1.1	20
FX6		18.6±0.5	10

LH20: Liquid Sephadex chromatography; TLCp: preparative thin layer chromatography; MIC: minimal inhibitory concentration. Fractions were tested at a concentration of 40 μg/disc; +/-: represents the standard deviation; the number of independent replicates was n=3.