The seeds of Prosopis africana (Guill. & Perr.) were collected and analysed for proximate, anti-nutritional factors, elemental, oxide composition and amino acid profile using standard procedures to evaluate the seeds' nutritional potentials. The results of the proximate composition indicated the following: ash content (3.94%), moisture (8.56%), protein (32.27%), lipids (2.36%), crude fibre (6.75%), and carbohydrate (46.12 %). The results of anti-nutritional factors showed that Prosopis africana seed contained oxalate (0.27 mg/100g), saponin (10.5 mg/100g), alkaloid (7.5 mg/100g), and tannin (16.24 mg/100g). Amino acid profile of the seeds was found to contain; lysine (2.77 mg/100g), methionine (1.86 mg/100g), isoleucine (3.46 mg/100g), leucine (13.26 mg/100g), phenylalanine (4.82 mg/100g), valine (4.13 mg/100g) and non-essential amino acids; arginine (3.62 mg/100g), serine (2.81 mg/100g), aspartic acid (4.58 mg/100g) and glycine (7.12 mg/100g). Elemental composition of the seeds showed potassium (1.397 mg/Kg), calcium (0.405 mg/Kg), Sulphur (1.679 mg/Kg), zinc (0.008 mg/Kg), cadmium (0.002 mg/Kg), phosphorus (0.545 mg/Kg), chlorine (0.021 mg/Kg), manganese (0.01 mg/Kg), silicon (0.202 mg/Kg), and antimony (0.007 mg/Kg); While the oxides composition were: MnO (0.013%), CaO (0.567%), Al O (0.061%), ZnO (0.01%) and SiO (0.433%). The 2 3 2 results of the study revealed that Prosopis africana seed contained high protein content which can be use to supplement the high cost conventional sources. However, the value of anti-nutritional factors suggests that proper processing methods should be adopted before it could be consumed.
Thirty-nine samples of rice were collected from thirteen Local Government Areas in Kaduna State and analysed for Aflatoxin B1 using the Enzyme-linked Immunosorbent Assay (ELISA) method. Concentrations of aflatoxin B1 was highest (177.2 µg/kg), in sample obtained at Sanga Local Government Area. These values were above the permissible limits described by some regulatory bodies like National Agency for Food and Drug Administration and Control (NAFDAC), European Union (EU) and European African Community (EAC). The concentrations (0.3µg/kg) of samples obtained from Kauru Local Government Area were observed to be the lowest. Generally, the rice samples investigated were found to contain varying concentrations of aflatoxin B1. This implies that direct consumption of the rice without pretreatment to reduce the aflatoxin content could be detrimental to health.
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