Related Experiment Video
Updated: Jun 10, 2026
Infection of In Vivo and In Vitro Pines with the Pinewood Nematode Bursaphelenchus xylophilus and Isolation of Induced Volatiles
Published on: September 27, 2024
Chemical and antioxidant investigations: Norfolk pine needles (Araucaria excelsa)
Helana N Michael1, Hanem M Awad, Nabil H El-Sayed
1Chemistry of Tanning Materials and Leather Technology, National Research Centre, Dokki, Cairo, Egypt.
Abstract:
Chemical investigations from a foliar extract of Araucaria excelsa (Lamb.) (Araucariaceae) resulted in the identification of seven phenolic metabolites including one flavananol, one flavananol 3-O-glycoside, four C-glycoside flavonoids, and one phenolic acid. Structures were elucidated by spectral determination including: UV, NMR and MS analysis. Moderate antioxidant activity was observed with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay in comparison with the reference antioxidant ascorbic acid.
