3 research outputs found
Comparison of DPPH Free Radical Scavenging, Ferric Reducing Antioxidant Power (FRAP), and Total Phenolic Content of Two Meriania Species (Melastomataceae)
Searching for new antioxidants used in pharmaceuticals, cosmetics or agrochemicals have increased today. Many phenolic compounds have been reported as promising for this goal. Melastomataceae is rich in these compounds. Consequently, in this research the antioxidant power for Meriania nobilis and M. hernandoi (Melastomataceae) was compared
Hydrolysable Tannins and Biological Activities of Meriania hernandoi and Meriania nobilis (Melastomataceae)
A bio-guided study of leaf extracts allowed the isolation of two new macrobicyclic
hydrolysable tannins, namely merianin A (1) and merianin B (2), and oct-1-en-3-yl
b-xylopyranosyl-(1”-6’)-b-glucopyranoside (3) from Meriania hernandoi, in addition to 11 known
compounds reported for the first time in the Meriania genus. The structures were elucidated by
spectroscopic analyses including one- and two-dimensional NMR techniques and mass spectrometry.
The bioactivities of the compounds were determined by measuring the DPPH radical scavenging
activity and by carrying out antioxidant power assays (FRAP), etiolated wheat coleoptile assays
and phytotoxicity assays on the standard target species Lycopersicum esculentum W. (tomato).
Compounds 1 and 2 exhibited the best free radical scavenging activities, with FRS50 values of
2.0 and 1.9 M, respectively
Comparison of DPPH Free Radical Scavenging, Ferric Reducing Antioxidant Power (FRAP), and Total Phenolic Content of Two Meriania Species (Melastomataceae).
Searching for new antioxidants used in pharmaceuticals, cosmetics or agrochemicals have
increased today. Many phenolic compounds have been reported as promising for this goal