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Articles by Marcel Andzouana
Total Records ( 2 ) for Marcel Andzouana
  Marcel Andzouana and Jean Bienvenu Mombouli
  The chemical and phytochemical analysis of Hymenocardia ulmoides and Vitex ferruginea leaves, used as medicinal plants in Congo-Brazzaville, was carried out. The proximate analysis revealed that the moisture, proteins, fat, fatty acid, carbohydrate and ash content of the leaves were respectively 67.20; 15.12; 2.75; 2.20; 8.57 and 3.29% for H. ulmoides. For V. ferruginea leaves, these content values were 55.41; 22.87; 1.38; 1.10; 4.53 and 6.84%. The energy values of the samples were 504.48 and 516.80 kj/100 g for H. ulmoides and V. ferruginea respectively. In H. ulmoides leaves, potassium (1.33%) was the major element, followed by calcium (0.75), phosphorus (0.55) and magnesium (0.33). The most abundant minerals detected in V. ferruginea leaves were potassium (4.39%), calcium (2.05%), magnesium (1.45%), aluminium (0.13) and phosphorus (0.91). Sodium, manganese, iron and aluminium in the case of H. ulmoides were detected as trace elements. The phytochemical screening of the leaf extracts revealed the presence of alkaloids, flavonoids, glycosides, saponins, steroids, tannins and triterpenoids in ethanol-water extracts of both plant samples. In methanol-chloroform extracts of H. ulmoides leaves, glycosides and saponins were not detected, while flavonoids, saponins and tannins were not found in V. ferruginea. Anthraquinones were absent in all the extracts of both plants. The plant leaves may be important in nutrition as leafy vegetables and in ethnomedicine as a remedy for their nutrient and non-nutrient bioactive compounds.
  Marcel Andzouana and Jean Bienvenu Mombouli
  Phytochemical constituents, proximate and mineral composition of Ochthocharis dicellandroides leaves were investigated in order to assess their nutritional value. The result of proximate composition showed that the leaves contained moisture (77.25%), crude protein (15.50%), carbohydrate (11.73%), crude fat (3.52%), energy (593.15 kj/mol) and ash (4.19%). Elemental analysis revealed that the minerals detected in the leaves were calcium, phosphorus, potassium, magnesium and iron in decreasing order of concentrations. Aluminium and sodium were found as trace elements and manganese was not detected. The phytochemicals detected in the leaves were alkaloids, flavonoids, Steroids, triterpenoids and glycosides, while anthraquinones tannins and saponins were not detected. The results showed high concentrations of flavonoids and steroids and a moderate amount of glycosides. However alkaloids and triterpenoids were detected in trace amounts. The results obtained in the present study indicate that the leaves of O. dicellandroides contain nutrients and mineral elements that determine their nutritional value. The presence of bioactive compounds such as flavonoids and steroids with pharmaco-therapeutical properties may justify the medicinal potential of the plant and confirm its nutritive importance for body health.
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