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Articles by A. Uzomah
Total Records ( 3 ) for A. Uzomah
  J.O. Akolade , G.A. Etuk-Udo , S.O. Dozie-Nwachukwu , D.O. Olalekan , N. Anuku , A. Uzomah and O.S. Odusanya
  A proprietary technique of biosynthesis of silver nanoparticles using banana trunk fibres is reported for the first time. In this study the potential applications of silver nanoparticles to three products: filter paper, shoe in-sole and egg crates by exploiting the bioactive properties of silver nanoparticles was demonstrated. The nanoparticles were phyto-synthesized by the reduction of silver nitrate solution using banana trunk fibres as both reducing and capping agents. The presence of silver nanoparticles was confirmed by the Plasmon resonance frequency absorption of silver at 420 nm; scanning electron microscopy and electron diffraction spectroscopy of the materials also showed the position of the nanoparticles within the fibre matrix and appreciable elemental signal level, respectively.
  N.E. Obasi , C.N. Ubbaonu , C.I. Iwuoha and A. Uzomah
  The influence of municipal wastes from selected dump sites in Imo State Nigeria, on the mineral and proximate contents of some crops found at the dumps was studied. The dump sites were located at Egbu-Timber road (5°31'57"N, 7°3'55"E) and World Bank layout (5°28'25"N, 7°1'10"E) in Owerri (both in Imo State, Nigeria). The Egbu Timber road dump is a tertiary dump site while the World Bank layout dump is a primary dump site. At the Egbu sample sites, the dump soil chromium content was 91.33% higher than that of the soil of the nearby normal farm. The farm crops also picked significant quantities of chromium. The nickel contents of crops should be watched as a substantial quantity was observed among the samples in relation to the soil nickel contents. There was also no substantial uptake of lead by the plants at this dump site. At the Owerri World Bank Housing Estate sample sites, some of the plants picked up some quantity of lead. There was a significant (p<0.05) pickup of vanadium by the dump pawpaw. The potassium contents of the crops at all the sample sites had the mineral values of the normal farm crops being much higher than those at the dump.
  N.E. Obasi , C.N. Ubbaonu , C.I. Iwuoha and A. Uzomah
  The influence of municipal wastes from selected dump sites in Abia State on the mineral contents of some crops found at the dumps was studied. Water leaves at Osisioma dump had the highest chromium value (243.33 mg kg-1) than the chromium values of other crops. The arsenic contents of the dump crops were low (2.63-12.01 mg kg-1) when compared with that of the dump soil (173.51 mg kg-1). Cadmium was only observed in a small quantity (1.85 mg kg-1) at the dump. The cadmium content of the nearby normal farm was 0.11 mg kg-1. None of the crops picked any significant amount as their cadmium contents all tended to zero. The nickel content of the dump soil (22.32 mg kg-1) was almost 100% higher than that of the nearby normal soil (1.25 mg kg-1). Maize at the dump seemed to have the highest affinity for nickel. The lead contents were not picked by any of the plants. Probably, there has not been degeneration of the lead containing components in the soil. All the crops at the Osisioma sample sites had a high affinity for iron. Hence, the consumption of crops from there needs to be watched in order to avoid iron overload.
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