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Articles by K.J. Umar
Total Records ( 5 ) for K.J. Umar
  K.J. Umar , L.G. Hassan , S.M. Dangoggo , M. Inuwa and M.N. Almustapha
  Melochia corchorifolia leaves were analysed for their proximate and mineral composition. On Dry Weight (DW) basis, the leaves had the following proximate composition: crude protein (23.31±2.27%), crude lipid (13.33±2.89%), ash (10.00±0.10%), crude fibre (23.33±2.89%) and available carbohydrate (30.03±2.83%). M. corchorifolia leaves had high moisture content (62.16±6.11% Wet weight) with low energy value (275.66±23.20 kcal/100 g). The mineral composition in mg/100 g DW are: K (7.250±37.50), Ca (750.37±10.58), Mg (108.33±5.77) and P (101.89±0.08), Na (94.00±1.15), Cu (33.50±2.55), Fe (19.91±3.01), Mn (9.68±0.59) and Zn (6.73±0.62). When the minerals detected were compared with US Recommended Dietary Allowances, K, Cu, Fe and Mn were found to be adequate for both adults and children. Furthermore, the leaves have nutrient density >100% except for phosphorus, which is low for pregnant and lactating mothers.
  K.J. Umar , L.G. Hassan , S.M. Dangoggo , S.A. Maigandi , N.A. Sani and A.I. Dogonyaro
  Wild leafy vegetables are widely eaten in developing countries and serves as nutrient supplements. The present study examined the effect of feeding albino rats with 75% Melocia corchorifolia leaves with respect to their body weight, liver and kidney biochemical, haematological and histological response. Results showed that the rats fed with M. corchorifolia leaves experience decrease in body weight compared to the control group. The Packed Cell Volume (PCV), haemoglobin concentration (Hb) and Red Blood Cells (RBC), White Blood Cells (WBC), platelets, Mean Carpuscular Volume (MCV), Mean Carpuseular Haemoglobin (MCH), Mean Carpuscular Haemoglobin Concentration (MCHC) and leukocyte (lymphocyte, neutophils, monocytes, eosinophils and basophils) differential counts were not significantly (p>0.05) different between control and treatment. Similarly, serum total protein, globulin and bilirubin were not significantly different, but that of albumin was significantly lower (p<0.05) in the treatment than control group. The serum enzyme activities, i.e., aspartate amino transferase (AST), alanine amino transferase (ALT) and alkaline phosphatase (ALP) were significantly (p<0.05) elevated in sample treatment than the control; which is an indication of organ toxicity by cellular destruction induced by the phyto-toxin present in the fed. Renal function indices-serum creatinine, urea, uric acid and electrolytes were not significantly different (p>0.05) between control and treatment. The results of this study showed that Melocia corchorifolia leaves have a relatively low or no toxicity profile.
  K.J. Umar , L.G. Hassan , S.M. Dangoggo and M.J. Ladan
  Analyses of the nutritional composition of water spinach (Ipomoea aquatica) Forsk leaves were carried out using standard methods of food analysis. The proximate composition as well as mineral elements were determined. The leaves were found on dry weight basis to have high moisture (72.83±0.29%), ash (10.83±0.80%), crude lipid (11.00±0.50%), crude fibre (17.67±0.35%) and available carbohydrate (54.20±0.68%), but low in crude protein content (6.30±0.27%). The leaves also have energy value (300.94±5.31 kcal/100 g) that is within the range reported in some Nigerian leafy vegetables. The mineral element contents were high with remarkable concentration of K (5,458.33±954.70 mg/100 g) and Fe (210.30±2.47 mg/100 g). Also the leaves content moderate concentrations of Na (135.00±2.50 mg/100 g), calcium (416.70±5.77 mg/100 g), Magnesium (301.64±12.69 mg/100 g) and P (109.29±0.55 mg/100 g), with low Cu (0.36±0.01 mg/100 g), Mn (2.14±0.22 mg/100 g) and Zn (2.47±0.27 mg/100 g) contents. Comparing the mineral content with recommended dietary allowance, it was showed that the plant leaves is good sources of K, Mn and Fe for all categories of people, while Mg is adequate enough for adult female and children. From the result, Ipomoea aquatica Forsk leaves could be used for nutritional purposes, due to the amount and diversity of nutrients it contains.
  K.J. Umar , L.G. Hassan , H. Usman and R.S.U. Wasagu
  The proximate, minerals and amino acids contents of wild melon (Citrullus ecirrhosus) seeds were determined. The results for proximate analysis (% DW) showed a composition of 3.73±0.25 moisture, 2.12±0.08 ash 26.36±0.10 crude protein, 50.67±0.76 crude lipid, 2.17±0.29 crude fibre, 18.69±0.82 available carbohydrate and energy value of 601.7±8.75 kcal/ 100 g. The seeds amino acids profile revealed that for adults but leucine, lysine and threonine are below the requirement value for children. The overall result implies that seed of the wild melon possessed the potential to be used as a source of nutrition.
  L.G. Hassan , K.J. Umar , S.M. Dangoggo and A.S. Maigandi
  Plants are the major sources of microelements to populace of the developing world. However, presence of antinutritional factors limit their optimal utilization. In this paper, antinutritional content and their effect on bioavailability of Ca, Fe and Zn in Melocia corchorifolia leaves was investigated. The result indicated that the plant leaves had high level of tannin (4,689.06±2.60 mg/100 g dry weight, DW). The concentration of other antinutritional factors per/100 g DW is as follows: phytate (88.57 mg), total oxalate (585.00 mg), soluble oxalate (217.50 mg), cyanide (16.02 mg) and nitrate (74.41 mg). The predicted Ca, Fe and Zn bioavailability showed that [Oxalate]/[Ca] and [Oxalate]/[(Ca + Mg)] are below the critical level of 2.5 known to impair calcium bioavailability. Furthermore, [Phytate]/[Ca], [Phytate]/[Fe] and [Phytate]/[Zn] are below the critical level of 0.5, 0.4 and 1.5 respectively. However, [Ca][Phytate]/[Zn], 16.72, is above the critical level of 0.5, which indicates significant effect of phytate on Zn bioavailability. From the results it can be concluded that M. corchorifolia leaves could be an important bioresource for Ca and Fe but not for Zn considering the predicted bioavailability.
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