047802 THUY G V, TIEN N M, QUY N N, CANG M H, QUAN P M, BUI L M, MINH L V, MUOI L G (Can Tho Univ, Can Tho City, Vietnam
, Email: email@example.com, firstname.lastname@example.org) : Preliminary chemical, total polyphenol, total flavonoid contents and antioxidant activity of eucalyptus camaldulensis Dehnh.. Asian J. Chem 2020, 32 (5), 1230 - 4.
This study aimed to identify phytochemicals and evaluate antioxidant activities of different extracts from Eucalyptus camaldulensis, an
aromatic plant in the Myrtaceace family. Examined extracts in different solvents such as diethyl ether extract (DEE), the ethanolic extract
(EE) and the aqueous extract (AE). Total polyphenol and total flavonoid contents were determined via aluminum chloride colorimetric
method. Antioxidant activity was performed via ABTS and DPPH radical scavenging assays. The results showed that a wide variety of
pharmacologically active compounds such as alkaloid, oil, flavonoid, triterpenoid, saponin, tannin and polyphenol were present in the
leaves of Eucalyptus camaldulensis. The result of quantitative determination showed that total polyphenol content of the diethyl ether
extract, ethanolic extract and aqueous extract achieved 73.47 ? 1.64, 306.48 ? 3.87 and 76.47 ? 1.64 mgGAE/g, respectively. Meanwhile,
total flavonoid content was 41.74 ? 2.21, 45.98 ? 1.79 and 18.05 ? 0.81 mgQE/g, respectively. The ethanolic extract exhibited the highest
DPPH (IC50 = 10.52 ? 0.14 ?g/mL) and ABTS (IC50 = 9.86 ? 0.17 ?g/mL). These results indicate that Eucalyptus camaldulensis leaves
can be used in dietary applications with the potential to reduce oxidative stress.
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