Papers by Ms.Krishanthiny Ravivarman
Antibacterial activity and preliminary screening of phytochemicals of locally available Green Leafy Vegetables in Batticaloa district, Sri Lanka , 2020
Plants and plant products are a better alternative, compared to antibiotics and other synthetic d... more Plants and plant products are a better alternative, compared to antibiotics and other synthetic drugs, which show negative side effects, including, sensitization reactions and disruption of the metabolic processes in the body via interaction with the body system. Herbal remedies offer deeper healing benefits, while providing lesser side effects, lower costs, and easy access. This study was aimed to investigate the antibacterial activity and the phytochemical properties of three locally available Green Leafy Vegetables (GLVs), namely, Argyreia pomacea (Convolvulaceae), Coccinia grandis (Cucurbitaceae) and Mollugo pentaphylla (Molluginaceae). All leaf samples were collected from different localities of Batticaloa district, Sri Lanka. The leaf extracts from acetone and ethanol at the concentrations of 25.0, 50.0 and 75.0 mg/100 μL were tested for antibacterial activity against Escherichia coli and Staphylococcus aureus, using well diffusion method and the qualitative phytochemical properties were also determined. The inhibitory effect was observed at all concentrations of acetone and ethanol extracts of C. grandis against both bacteria. The highest inhibitory effect on E. coli and S. aureus was shown by ethanol extract of all samples. The ethanolic extract of C. grandis at the concentration of 75.0 mg/100μL showed highest antibacterial activity against S. aureus (22.7±0.5 mm) and E. coli showed higher susceptibility to C. grandis (20±0.6 mm) in ethanol extract at 75.0 mg/100μL. Phytochemical analysis revealed the presence of alkaloids, saponins, flavonoids and tannins in both extracts of C. grandis. Flavonoids were found in the ethanol extracts of A. pomacea and M. pentaphylla.
Proceedings of the 2 nd International Symposium on Agriculture 2019, 2019
Wild greens make up a significant source of antioxidants and Phyto-chemicals. In recent times nat... more Wild greens make up a significant source of antioxidants and Phyto-chemicals. In recent times natural antioxidants have gained considerable interest among nutritionists, food manufacturers, and consumers because of their safety, potential therapeutic value, and long shelf life. Minerals are inorganic substances used by the body in many ways.
Three Wild Green Leafy Vegetables (WGLVs) such as Allmania nodiflora, Borreria hispida and Rivea ornata were selected based on the market survey. The analysis for Vitamin C, Total Phenolic Content (TPC) and Total Antioxidant Activities (TAA) was carried out using fresh WGLVs. Selected Dry WGLVs were also used to investigate some essential major elements such as Na, K, Ca and Mg by using standard methods of food analysis. The Vitamin C content was determined by 2, 4-dinitrophenyl hydrazine
method (DNPH), TPC was measured using Folin-Ciocalteu reagent method and TAA was determined by the ferric reducing ability method. Among these leafy vegetables Rivea ornata shows higher Vitamin C, TPC and higher K, Ca and Mg content. Allmania nodiflora shows high TAA and Na content.
Keywords: Wild Green Leafy Vegetables, Vitamin C, Total Phenolic Content
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Papers by Ms.Krishanthiny Ravivarman
Three Wild Green Leafy Vegetables (WGLVs) such as Allmania nodiflora, Borreria hispida and Rivea ornata were selected based on the market survey. The analysis for Vitamin C, Total Phenolic Content (TPC) and Total Antioxidant Activities (TAA) was carried out using fresh WGLVs. Selected Dry WGLVs were also used to investigate some essential major elements such as Na, K, Ca and Mg by using standard methods of food analysis. The Vitamin C content was determined by 2, 4-dinitrophenyl hydrazine
method (DNPH), TPC was measured using Folin-Ciocalteu reagent method and TAA was determined by the ferric reducing ability method. Among these leafy vegetables Rivea ornata shows higher Vitamin C, TPC and higher K, Ca and Mg content. Allmania nodiflora shows high TAA and Na content.
Keywords: Wild Green Leafy Vegetables, Vitamin C, Total Phenolic Content
Three Wild Green Leafy Vegetables (WGLVs) such as Allmania nodiflora, Borreria hispida and Rivea ornata were selected based on the market survey. The analysis for Vitamin C, Total Phenolic Content (TPC) and Total Antioxidant Activities (TAA) was carried out using fresh WGLVs. Selected Dry WGLVs were also used to investigate some essential major elements such as Na, K, Ca and Mg by using standard methods of food analysis. The Vitamin C content was determined by 2, 4-dinitrophenyl hydrazine
method (DNPH), TPC was measured using Folin-Ciocalteu reagent method and TAA was determined by the ferric reducing ability method. Among these leafy vegetables Rivea ornata shows higher Vitamin C, TPC and higher K, Ca and Mg content. Allmania nodiflora shows high TAA and Na content.
Keywords: Wild Green Leafy Vegetables, Vitamin C, Total Phenolic Content