Table 4.
Effective concentration (EC50) values in antioxidant activities of four Cinnamomum species extracted by different solvents
| Solvent | DPPH EC50 (mg/mL) | ABTS EC50 (mg/mL) | ||||||
|---|---|---|---|---|---|---|---|---|
| CB | CC | CL | CV | CB | CC | CL | CV | |
| 80% Ethanol | 1.01 ± 0.11bD | 4.33 ± 0.10bA | 3.11 ± 0.12bB | 2.69 ± 0.08bC | 0.11 ± 0.00bC | 0.39 ± 0.03bA | 0.25 ± 0.02bB | 0.23 ± 0.01bB |
| 80% Methanol | 0.94 ± 0.10bD | 3.98 ± 0.14bA | 2.68 ± 0.15bB | 2.39 ± 0.12cC | 0.09 ± 0.01bC | 0.33 ± 0.02bA | 0.24 ± 0.01bB | 0.21 ± 0.01bB |
| RO water | 3.65 ± 0.56aC | 20.87 ± 1.51aA | 6.29 ± 0.43aB | 4.29 ± 0.17aC | 0.27 ± 0.03aB | 1.05 ± 0.53aA | 0.40 ± 0.05aB | 0.29 ± 0.02aB |
| BHA | 0.21 ± 0.01 | NA | ||||||
| BHT | NA | 0.04 ± 0.00 | ||||||
Results are expressed as mean ± SD (n = 3). Mean values with different lower-case superscripts in the same column are significantly different (p < 0.05) within the extracting solvents and different upper-case superscripts in each row indicate significant differences (p < 0.05) within the species
DPPH 2,2-diphenyl-1-picrylhydrazyl radical assay; ABTS 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) radical assay; BHA butylated hydroxyanisole; BHT butylated hydroxytoluene; NA not applicable; CB C. burmannii; CC C. cassia; CL C. loureiroi; CV C. verum