Browsing by Author "Thomas Odey Magu"

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    ANTIMICROBIAL STUDY OF SOME TRANSITION METAL COMPLEXES OF RHODANINE AND SALICYLADIMINE
    (Asian Journal of Basic and Applied Science, 2018-09-10) Oluwatobi Omotola Amusan; Hitler Louis; Oluwatomosin F. Oyebanji; Temitope Adejoke Hamzat; Thomas Odey Magu; Aderemi T adeleye
    In this study, complexes of copper and zinc with rhodanine and salicyladimine were examined for their antimicrobial properties against selected bacteria species. The complexes were also characterized using infra-red and ultra-violet spectroscopy for structural elucidation and determination of electronic transitions occurring between the ligands and their complexes. All the complexes showed varied inhibition on the growth of the test organisms at different minimum inhibitory concentrations ranging from 0 – 25 mg/ml. The infra-red spectroscopy showed the presence of different functional groups like O-H stretching vibration at 3441cm-1, C- H bending at 833.28cm-1 and 750.33cm-1, C=C stretching vibration at 2360.95cm-1 in the salicyladimine ligand and N-H stretching vibration at 3448.84cm-1 in the complex formed with copper, whereas Rhodanine shows C=O at 1734cm-1 with copper acetate, 1708.99cm-1 with Zinc nitrate, C-H stretching at 3086.21cm-1, 3074.63cm-1 with copper and 3174.94cm-1 with zinc. The ultraviolet spectroscopy showed absorptions assigned to different geometry. The complex of salicylaldimine showed two bands around 26385 cm-1 and 42016 cm-1 which are assigned to square planar geometry. Rhodanine showed four bands around 48780 cm-1, 33898 cm-1, 39525 cm-1 corresponding to n→π* transition and 26809 cm-1 corresponding to n→σ* transition. Rhodanine complex with zinc nitrate showed two bands around 23925cm-1 and 22411cm-1 assigned to charge transfer. Rhodanine complexed with copper acetate showed two bands around 20283 cm-1 and 24096 cm-1 which are assigned to square planar geometry. From the analysis of variance, there is no significant difference (p-value= 0.05) in the antibacterial activity and the selected pathogen. Based on this study, we recommend that metal complexes should be used to restrict the growth of bacteria in place of Ligands
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    Determination of Cadmium Concentration in Eight Nigerian Food Samples from Some Selected Markets using Atomic Absorption Spectrophotometric Method
    (IJESPR, 2018-08-08) Hamzat Adejoke Temitope; Hitler Louis; A. T Aderemi; Pigweh I. Amos; Oluwatobi Omotola Amussan; Thomas Odey Magu; S. A Lawani
    This study investigates the presence of cadmium in eight Nigerian food samples from Oja Oba, Ojuwoye and Kuto markets in Kwara, Lagos and Ogun State respectively. The food samples were analyzed using atomic absorption spectrometer. The results obtained revealed that cadmium was present in all the food samples that were analyzed at different concentration ranging from 0.001 ppm to 0.007 ppm. The results showed a permissive concentration of cadmium in the food samples as compared to FAO/WHO Expert Committee on food additives (EFSA, 2012) weekly limit of 2.5 μg/kg body weight. Since trace amount of cadmium is expected in almost all food samples due to natural conditions, it is necessary to pay close attention to cadmium contamination in food samples as continuous intake of food containing cadmium is dangerous to health