antioxidant activity of plant extracts thesis

PhD Thesis. Antioxidant properties of extracts from selected plant materials (Caesalpinia spinosa, Perilla frutescens, Artemisia annua and Viola wittrockiana) in vitro and in model food systems. Monika Skowyra. Supervisor: Dr. María Pilar Almajano Pablos. Program of Chemical Process Engineering. Department of
Antibacterial activity of methanol extract was higher for Escherichia coli with 4.5±0.15 mm zone of inhibition and for Staphylococcus aureus hexane extract was highly effective with the zone of inhibition of 7.8±0.36 mm. Plant extract showed potential antioxidant activity but antibacterial activity was found to be comparatively
Ph. D. Thesis: Miss Sandhya V. Rodge, 2015. ANTIOXIDANT ACTIVITY. The antioxidant activity of selected medicinal plants was performed at Chemistry. Research Laboratory, Deogiri College, ... The antioxidant activity of methanol fruit extract of Coccinia grandis was examined by comparing it to the activity of standard
to the total antioxidant activity of the plants under study. Total antioxidant activities of plant essential oils were determined using 1, 1- diphenyl-2-picrylhydrazyl (DPPH) and the result was in agreement to the total antioxidant activities of plant extracts, which A. occidentale having the highest amount. The highest antioxidant
/antioxidant power (FRAP) and iron chelating ability were realized. The results revealed that the extracts exhibited a potent DPPH radical scavenging activity and powerful Ferric. Reducing Ability, which were better than those of qurcetin gallic acid and ascorbic acid. In general the iron chelating ability of three plants extracts
investigating the potential free radical scavenging activity of plant extracts. The lipid peroxide assay and method of analysis was re-evaluated and a standardised procedure established. All eight crude plant extracts showed marked antioxidant activity in both assays. Results for the crude plant extract in the lipid peroxide
The methanolic crude extracts of Desmodium gangeticum (Linn.), Eclipta alba (Linn.) Ocimum sanctum. (Linn.), Piper longum (Linn.), Solanum nigrum (Linn.) and Amaranthus caudatus (Linn.) were screened for their free radical scavenging properties using ascorbic acid as standard antioxidant. Free radical scavenging
It is well known that the antioxidant activity of plant extracts containing polyphenol components is due to the capacity to be donors of hydrogen atoms or electrons and to capture the free radicals. In the present study, A. nigra methanolic leaf extract showed a significant effect in inhibiting DPPH, reaching up to 86.35% at
I hereby declare that the dissertation/thesis submitted for M Tech: Chemistry, at Vaal University of. Technology has never been ... Figure 4.10 Bioautography activity of plant extracts. 62. Figure: 4.11 Graph of ... antioxidant potentials of the leaves of Rhus leptodictya were studied, followed by isolation of at least one active
Isolation and characterization of antioxidant compounds from Combretum apiculatum (Sond.) subsp apiculatum leaf extracts. Dimakatso Thomas Kgatle. October ... Dissertation submitted to the Department of Paraclinical Sciences .... that the antimicrobial activity of aqueous plant extracts may be related to the antioxidant.

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