Inhibitory effect of cultured marine microalga Nannchloropsis oculata solvent extracts by solvent-solvent partition chromatography on lipo-polysaccharide (LPS)?induced nitric oxide (NO) production (%) (A) and cell viability (%) (B) in RAW 264.7 macrophages. The incubation of extracts (NOH, N. oculata hexane fraction; NOC, N. oculata chloroform fraction; NOE, N. oculata ethyl acetate fraction; NOA, N. oculata aqueous fraction) with cells in response to LPS (1 μg mL-1) for 24 h, the NO levels in the medium was measured. CON, negative control (no LPS treated); LPS, positive control (LPS 1 μg mL-1 treated). Concentration of sample treated 6.25, 12.5, 25, and 50 μg mL-1, and add LPS, respectively. Values are mean ± standard deviation of three determinations. Values with different alphabets are significantly different at p < 0.05 as analyzed by Duncan's multiple range test.