[PDF][PDF] Total phenolic and flavonoid contents and antioxidant activity of Lantana camara and Cucurbita pepo (Squash) extracts as well as GC-MS analysis of Lantana …

MM El-Sayed, MM Hashash, AA Abdel-Hady… - World J Pharm …, 2017 - academia.edu
MM El-Sayed, MM Hashash, AA Abdel-Hady, H Abdel-Hady, EE Abdel-Lateef, EA Morsi
World J Pharm Res, 2017academia.edu
This study aimed to determine total phenolic and flavonoid contents as well as evaluate
antioxidant activity of the defatted methanolic extracts of flowers, leaves, stems and certain
fractions (dichloromethane, ethyl acetate, n-butanol and water residue) derived from the
defatted methanolic extract of Lantana camara and Cucurbita pepo (Squash) leaves
besides, the essential oils of L. camara leaves and flowers by using (DPPH, ABTS and TAC
assay). The chemical composition of L. camara essential oils was identified by GC-MS …
Abstract
This study aimed to determine total phenolic and flavonoid contents as well as evaluate antioxidant activity of the defatted methanolic extracts of flowers, leaves, stems and certain fractions (dichloromethane, ethyl acetate, n-butanol and water residue) derived from the defatted methanolic extract of Lantana camara and Cucurbita pepo (Squash) leaves besides, the essential oils of L. camara leaves and flowers by using (DPPH, ABTS and TAC assay). The chemical composition of L. camara essential oils was identified by GC-MS analysis. The results exhibited that the defatted methanolic extracts of L. camara (flowers, leaves and stems) have higher phenolic and flavonoid contents as well as antioxidant activity than C. Pepo (Squash) parts. Also, the ethyl acetate fraction of L. camara has the highest phenolic and flavonoid contents as well as the highest antioxidant activity (DPPH; SC50= 11.82±0.21 µg/mL, TAC; 290.96±6.71 mg eq. ascorbic acid/g extract, ABTS; 94.03±0.25 mm Trolox® eq./100g extract). There is a positive correlation between the total phenolic and flavonoid contents and the antioxidant activity of the tested extracts or fractions. GC-MS analysis of essential oil of L. camara leaves and flowers revealed the presence of 47 compounds in leaves and 40 compounds in flower. The major compounds in the leaf oil were 7 (11)-selinen-4α-ol (14.50%) and cedrenol
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