This study examined potentially toxic elements (PTEs) from poultry feeds. The presence of PTEs in the environment raises health concern because these elements can be toxic, ubiquitous and cannot be degraded to non-toxic forms by any known method and as a result remain in the environment for decades. This is a potential pathway through which these PTEs could easily enter the food chain. Six PTEs (Cd, Cr, Cu, Pb, Mn, Ni and Zn) were determined from four feed types (starter, grower, finisher and layer) from four manufacturers coded A, B, C and D. The samples were prepared, digested and analysed for PTEs using atomic absorption spectrophotometer. The mean concentrations obtained were in the following ranges: 0.49 – 0.76 mg/kg (Cd); 11.9 – 7.90 mg/kg (Cr); 5.10 - 7.91 mg/kg (Cu); 7.17 - 9.47 mg/kg (Pb); 26.9 - 34.9 mg/kg (Mn); 3.80 - 6.50 mg/kg (Ni) and 27.8 - 38.4 mg/kg (Zn). These results were compared with the maximum acceptable concentration for PTEs in feeds as stipulated by the European Union standard and the concentrations of Pb and Ni exceeded maximum acceptable concentration. When concentrations exceed set standard, it implies risk to human health. Thus, the need for continuous monitoring of feed compositions.

As part of the current research for more effective antimalarial drug, Cu (II) complex of sulphamethazine with 1,10 phenanthroline was synthesized. The novel complex was characterized by Elemental analysis, FT-IR and electronic spectroscopy. The novel complex is insoluble in water, which is an indication of covalent and non- electrolyte character. The elemental analysis result of the complex correspond with the proposed formula [Cu(SUF)(phen)(SCN)2]. The electronic spectrum of sulfamethazine and 1, 10- phen showed absorption bands at 212 nm (47169 cm−1) and 306 nm (32679 cm–1). These bands were assigned to the n – δ* and π – δ* transitions. The infrared bands were seen at 3443 – 3344 cm −1which were attributed to the presence of v(NH2), v(NH) and v (OH) vibrations experience bathochromic shift in the metal complex. The parent ligands acted as a bidentate chelating agent showing coordination through the pyridine nitrogen and the nitrogen of the NH moiety in this case.

The objective of this study was to determine the proximate and microbiological compositions of some food samples obtained at three different locations within Ibadan Metropolis, Nigeria from different local food vendors. The highest mean carbohydrate, crude protein, fat, moisture, total ash and crude fibre are 88.10 ±0.79% (Roasted Yam), 17.76 ±2.29% (Roasted Fish), 20.54 ±4.0% (Suya Meat), 20.27 ±11.43% (Roasted Plantain), 4.57 ±0.10% (as in Suya Meat) and 5.07 ±0.69 (Roasted Plantain) respectively while the lowest mean carbohydrate, crude protein, fat, moisture, total ash and crude fibre are 49.14 ±1.37% (as in Fried Bean Cake), 0.08 ±0.01% (Roasted Yam), 0.47 ±0.05% (Roasted Yam), 1.81 ±0.33 (Roasted Fish), 1.37 ±0.12 (Doughnut) and 0.16 ±0.06% (Fried Bean Cake) for all the samples estimated. The highest mean heterotropic bacteria and fungi counts are 6.19× 103 cfu/ml (Roasted Yam) and 3.30× 103 cfu/ml (Fried Bean Cake) respectively while the lowest mean heterotropic bacteria and fungi counts are 1.64× 103 cfu/ml (Doughnut) and 1.08× 103 cfu/ml (Roasted Plantain) respectively. These food samples were shown to contain certain level of proximate parameters but these are not sufficient for nutritional requirements in human diet. Increasing the shelf-life of foods is one of the major purposes in food processing. Processes which precede food processing causes loss of essential vitamins and minerals. Also, roasted foods sold along Nigerian road-sides are exposed to dust accumulation and wastes from automobile exhaust.