Browsing by Author "Agbenorhevi, Jacob K."
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- ItemAckee (Blighia sapida) fruit arils: Nutritional, phytochemicals and antioxidant properties(International Journal of Nutrition and Food Sciences, 2014-11-10) Dossou, Veronica M.; Agbenorhevi, Jacob K.; Combey, Sussana; Afi-Koryoe, Sarah; 0000-0002-8516-7656The limited information on the health and nutritional benefits of edible arils of the ackee (Blighia sapida) tree makes it underutilized in West Africa. This study was to investigate the nutrient content, total phenols, antioxidant activity and phytochemical constituents of freeze and oven dried ackee arils. Phytochemical analysis was done using standard protocol whereas antioxidant activity and total phenol content was determined using the DPPH and Folin-Ciocalteau methods, respectively. The minerals content was determined by means of atomic absorption spectrophotometry. The moisture, crude fat, crude protein, crude fibre, ash, carbohydrate and energy content were in the range of 4.83-5.20%, 51.60-56.66%, 10.94-11.67%, 3.63-3.88%, 8.01-8.56%, 14.41-20.62% and 590.67-614.26 kcal/100g, respectively. The ackee arils also contained appreciable minerals (Ca, P, Mg, Na, K and Zn) with K (425.10-475.71 mg/100g) being the highest while Zn (1.95-2.08 mg/100g) was the least mineral. Phytochemical screening revealed the presence of tannins, saponins and glycosides in the arils. The total phenolic content was 5235.04±103.9 and 5175.38±178.46 mg GAE/100g in oven-dried and freeze-dried samples, respectively. The vitamin C content was 29.6 and 35.7 mg/100 g whereas antioxidant activity was 66.0 and 29.4 % DPPH inhibition (with trolox equivalence of 91.0±9.4 and 40.6±0.6 µM TE/g) in the oven and freeze dried ackee arils, respectively. Drying method had effect on the phytochemicals and antioxidant activity of the ackee flour sample. The findings suggest that ackee aril had considerable total phenols content and antioxidant activity, which implies that the fruit aril has the potential for application in food systems to maintain food quality
- ItemCharacterization of pectin extracted from muskmelon (Cucumis melo L.)(Journal of Science and Technology, 2021-10) Nyarko, Benjamin; Agbenorhevi, Jacob K.; Wireko-Manu, Faustina D.; Kpodo, Fidelis M.; 0000-0002-8516-7656; 0000-0002-5020-6299; 0000-0002-7949-0502Muskmelon (Cucumis melo L.) fruits are cultivated for their seeds, but the peels are potential sources of pectin for food and pharmaceutical applications. The objective of this study was to extract and characterize pectin from muskmelon peels subjected to two different drying techniques. The pectin was extracted using acid treatment and the structure, chemical composition and functional properties determined. Oven and solar dried muskmelon pectin extracts gave comparable yields (6.48% and 5.27%), high degree of methylation (60.53 and 64.97%) and anhydrouronic acid content of 46.99% and 56.60%, respectively. Intrinsic viscosity was 0.3 gdL-1 irrespective of drying technique used. The pectin extracts from the oven and solar dried muskmelon demonstrated good water absorption (208g/100g and 269g/100g), oil absorption (237g/100g and 152g/100g) and emulsion (50% and 46%) capacities, respectively. The different drying techniques used did not significantly influence physicochemical and functional properties. The findings show that muskmelon pectin are high methoxyl pectin with good functional properties which can be tailored for use in food and pharmaceutical formulations.
- ItemInvestigation into the Total Phenols and Antioxidant Activity during Storage of Fruit Smoothies(Journal of Food Science and Engineering, 2012) Agbenorhevi, Jacob K.; Marshall, Lisa J.; 0000-0002-8516-7656; 0000-0001-6057-5592In this study, the total phenols (TP) and antioxidant activity of three different fruit smoothies (Blackberries, Raspberry and Boysenberry (BRAB), Mango and Passion fruits (MAP) and Blackcurrant, Acerola cherries and Rosehips (BACAR)) were determined during storage by Folin-Ciocalteu and ferric reducing antioxidant power (FRAP) assays respectively. TP ranged from 1,943 to 2,692 mg L-1 gallic acid equivalent whereas FRAP from 43,217 to 126,125 µmol L-1 Trolox equivalent for the three smoothies on opening. BACAR had the highest TP and antioxidant activity. The smoothies showed significant decrease (P < 0.05) in TP during storage. The decrease in antioxidant activity was significant (P < 0.05) for BRAB and MAP only. However, the study revealed that the smoothies had high antioxidant activity even during shelf-life at 4 °C which implies that consumption of smoothies may give considerable antioxidant benefits. Correlation between TP and antioxidant activity was strong and highly significant (r = 0.890, P < 0.0001).
- ItemMineral Composition, Antioxidant Properties, Phytochemical and Anti-nutrient Composition of African Palmyra Palm (Borassus aethiopum) Fruit Flour(American Journal of Food and Nutrition, 2018) Abe-Inge, Vincent; Arthur, Christine; Agbenorhevi, Jacob K.; Kpodo, Fidelis M.; 0000-0002-4898-6046; 0000-0002-2882-3012; 0000-0002-8516-7656; 0000-0002-7949-0502African palmyra palm (Borassus aethiopum) grows widely across Africa. Previous studies indicated its fruit flour has a great potential in food applications. The objective of this work was to investigate the effect of different drying methods on the mineral composition, antioxidant properties, anti-nutrient composition and phytochemical composition of the African palmyra palm (APP) flour. The fresh fruit pulp was obtained, freeze dried, oven dried, solar dried and milled into flour. Phytochemical screening, mineral analysis, anti-nutrient analysis and antioxidant analysis were conducted on the flour obtained according to standard methods. The flour had high total phenols (1518.00 - 3896.71 mg GAE/100g), potassium (237.00 - 276.73 mg/100g), magnesium (211.61 - 293.62 mg/100g) and saponin (36.10 – 55.62 g/100g). The flour samples also had considerable free radical scavenging activities. Phytochemical screening indicated the presence of several phytochemicals including glycosides. Drying had a significant effect on the analysed composition of APP flour.
- ItemPhysicochemical and functional properties of dried okra (Abelmoschus esculentus L.) seed flour(Food Science & Nutrition, 2020) Ofori, Jemima; Tortoe, Charles; Agbenorhevi, Jacob K.; 0000-0001-6345-2686; 0000-0002-8516-7656The physicochemical and functional properties of dried okra seed flour of two genotypes Agbagoma and Balabi were evaluated. The samples Agbagoma and Balabi had 8.90%–9.00% moisture, 16.80%–17.40% protein, 47.80%–48.00% fat, 7.70%–7.80% ash, and 18.20%–18.40% carbohydrate. The mean values of functional properties revealed significant differences (p < .05) between okra seed flour samples studied. The samples’ bulk density range was 0.80–0.83 g/ml. Water absorption capacity and oil absorption capacity ranged from 511.65% to 504.32% and 88.38 to 160.67%, respectively. The solubility was 14.10% for Agbagoma and 10.97% for Balabi, whereas swelling power was 16.37% and 14.68% for Agbagoma and Balabi, respectively. All pasting properties except peak time and pasting temperature of Agbagoma seed flour were higher than those of Balabi seed flour. The study revealed that dried okra seed flour is rich in nutrients, which could be used for baking and fortification of foods.