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Articles by D.E. Okwu
Total Records ( 2 ) for D.E. Okwu
  D.E. Okwu and B.O. Orji
  The present research discussed the nutritive value and phytochemical composition of three cultivars of Vigna unguiculata and Glycine max grown in Nigeria. Phytochemical studies revealed the presence of bioactive compounds comprising flavonoids (2.36-6.28 mg 100 g-1), alkaloids (1.28-1.64 mg 100 g-1), tannins (0.38-0.77 mg 100 g-1), saponins (0.11-0.23 mg 100 g-1). The protein, carbohydrate, lipids and fiber content were 19.69-39.08, 32.78-67.26, 2.70-21.08 and 1.78-4.68%, respectively. The food energy value ranges from 363.71-477.16 cal g-1. The grains are rich in B-vitamins such as niacin (1.85-4.01 mg 100 g-1), thiamin (0.46-1.72 mg 100 g-1), riboflavin (0.22-170 mg 100 g-1) and ascorbic acid content ranges from (5.20-55.44 mg 100 g-1). These grains are good sources of minerals comprising calcium, magnesium, phosphorus and potassium while sodium content was low. The legumes can be considered as sources of quality raw materials for food and pharmaceutical industries.
  D.E. Okwu and F.N.I. Morah
  The ethanolic extract of Garcinia kola, Heckel (Guttiferae), which had previously been shown to have biological activity were studied. Preliminary phytochemical screening of the plants showed the presence of flavonoids, phenolic compounds, tannins and saponins. The ethanolic extract of Garcinia kola seeds resulted in the isolation and characterization of flavanone glycoside 4I, 5, 7-trihydroxyflavonone rhamnoglucose (that is naringin-7-rharmnoglucoseside) from its spectral data. IHNMR spin system analysis and acid hydrolysis were performed to characterize the higher order rhamnoglucosyl moiety comprising glucose and rhamnose linked to carbon 7 of the flavanone ring system of the isolate. It is concluded that 4I, 5, 7-trihydroxyflavanone rhamnoglucose may be a contributor to the antioxidants, anti-inflammatory, anti-microbial, anti-tumor and anti-hepatotoxic properties exhibited by Garcinia kola seed.
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