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Articles by R. Dave
Total Records ( 2 ) for R. Dave
  S. Chanda , R. Dave and M. Kaneria
  The main goal of this study was to determine the antioxidant activity of twelve medicinal plants (Averrhoa carambola (Oxalidaceae), Buchanania lanzan (Anacardiaceae), Calophyllum inophyllum (Clusiaceae), Celastras peniculatus (Celastraceae), Clerodendron multiflorum (Verbenaceae), Luffa acutangula (Cucurbitaceae), Morinda citrifolia (Rubiaceae), Ocimum gratissimum (Lamiaceae), Paltophorum ferrugineum (Papillionaceae), Phyllanthus fraternus (Euphorbiaceae), Triumfetta rotundifolia (Tilliaceae), Ziziphus nummularia (Rhamnaceae) belonging to different families. Antioxidant activity was determined by using different methods like DPPH (2,2’-Diphynyl, 1-picrylhydrazyl) free radical scavenging assay, hydroxyl radical scavenging assay, superoxide anion radical scavenging assay and reducing capacity assessment. The plants were extracted individually by cold percolation method using different organic solvents (petroleum ether, acetone and methanol) depending on their polarity. Ascorbic acid was used as standard to determine DPPH free radical scavenging activity and reducing capacity assessment. Gallic acid was used as standard to determine hydroxyl radical scavenging activity and superoxide anion radical scavenging activity. Amongst the twelve plants studied, acetone and methanolic extract of Paltophorum ferrugineum showed the best radical scavenging activity and reducing capacity assessment.
  Y. Vaghasiya , R. Dave and S. Chanda
  The aim of the present study was to investigate total phenols and flavonoids content of 53 traditionally used medicinal plants of western region of India. The plants/plant parts were extracted by cold percolation method in acetone and methanol. Qualitative phytochemical analysis was done for various phytoconstituents like alkaloids, tannins, cardiac glycosides, steroids and saponins. Total phenol and flavonoid conent was quantitatively estimated. Total phenolic contents were determined by the Folin-Ciocalteus reagent method. Total phenolic content was expressed as GAE (Gallic Acid Equivalents). Total flavonoid content was determined by the aluminium chloride colorimetric method. Total flavonoid content was expressed as quercetin equivalents. Tannins were present in more number of plants followed by cardiac glycosides and steroids. The Mangifera indica showed highest phenolic content, maximum content being in the methanol extract followed by Strychnos nux-vomica, Origanum marjoram, The Aristolochia bracteolate showed highest flavonoid content, maximum content being in the acetone extract followed by Phyllanthus reticulates, Argemone mexicana. Many reports suggest a positive correlation between total phenolic content and antioxidant activity so it can be stated that the Mangifera indica may possess good antioxidant property because of its high phenolic content.
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