Browsing by Author "Oloyede, F. A"
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- ItemOpen AccessAntioxidant Activities and Food Value of Five Underutilized Green Leafy Vegetables in South Western Nigeria(Nigerian Journal of Nutritional Sciences, 2011) Oloyede, F. M; Oloyede, F. A; Obuotor, E. M; Ibironke, S. I.Objectives: To determine the food value and antioxidant activities of five underutilized leafy vegetables namely: Bidens pilosa L.-Beggar's ticks/ Cobbler's peg; Celosia trigna L.- Woolflower; Crassocephalum crepidioides (Benth) S. Moore – Fireweed/redflower ragleaf; Launaea taracifolia (L.) Cars- Wide lettuce and Solanun nigrum L. - Black Nightshade/sun berry. Materials and methods: Fresh shoots of the five vegetables were collected from the wild, cleaned and milled. Food values which include proximate, minerals, and vitamin C contents were analyzed following the routine chemical analytical methods of Association of Official Analytical Chemists. 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging effect and phenolic compounds concentrations of the plants extracts were determined spectrophotometrically. Results: The antioxidant activities and nutrient contents of the five vegetables showed variable trends and considerable high values. Across the vegetables, antioxidant activities ranged from 67.2% (L. taracifolia) to 91.8% (B. pilosa) at a concentration of 1mg/ml of the extracted material. The total phenol contents were between 5953.5k1.5 and 10193.5+0.5 mgi100g. The flavonoid contents varieg from 3438±1.00 to 4974±1.00 mg/100g. Anthocyanin content in mg/100g ranged from 0.385±0.005 to 5.065±0.015 while Proanthocyanidin content varied from 0.125±0.05 to 2.050±0.15 in the extract powder. Crude protein values ranged from 3.5 to 9.16g/100g, Carbohydrate contents varied from 1.09 to 9.43g/100g while ascorbic acid(Vitamin C) compositions ranged from 27.2 to 87.3 mgI100g. Ca content ranges from 31.23 to 54.90 mg/100g, while Fe content varied from 21.25 to 139.75 mg/100g. Conclusion: The vegetables contained appreciable quantities of protein, iron, calcium and vitamin C. The antioxidant activities and phenolic antioxidant contents of the vegetables were also high. The health claims associated with some of these food values and bioactive compounds are noteworthy, thereby underlining the potential role of these underutilized vegetables as functional foods.
- ItemOpen AccessHepatoprotective activity of aqueous extract of the leaves of Hyptis suaveolens (l.) Poit on acetaminophen Induced hepatotoxicity in Rabbits(2011) Babalola, O. O.; Ojo, O. E; Oloyede, F. AThe study was designed to evaluate the possible hepatoprotective activity of the pretreatment with aqueous extract of the leaves of Hyptis suaveolens on acetaminophen induced hepatotoxicity in rabbits. Albumin, total protein, total globulin, alanine transaminase aspertate transaminase and catalase in the blood plasma and liver were assayed as biochemical markers of hepatotoxicity and possible associated oxidative stress. Plasma and total liver proteins, albumin. globulin concentrations were determined using standard spectrophotometric methods also the activities of alanine transaminase, aspertate transaminase and catalase in the plasma and liver homogenates were determined by standard techniques. The maker enzymes show significant elevation in acetaminophen treated animals; these were significantly reduced toward an almost normal level in animals pretreated with aqueous extract of the leaves of Hyptis suaveolens. The reduction was observed for the concentrations of total protein and albumin. This showed that aqueous extract of the leaves of Hyptis suaveolens in addition to many of its numerous reported bioactivity probably possesses hepatoprotective potentials on acetaminaphen induced liver damage.