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Articles by E.N. Ejike
Total Records ( 5 ) for E.N. Ejike
  A. Okoro , E.N. Ejike and C. Anunoso
  The absorptive behaviour of the three modified cellulose. Cellulose pulps were investigated as crude oil absorbent materials. There three modified cellulose pulps were Benzoyl modified cellulose BMC, Toluenediisocyanate cellulose TDC and toluenediisocyanate cellulose processed by blown TDCb. the highest adsorption capacities of each of these three modified cellulose pulps were BMC (97.50%), TDC (97.50%) and TDCb (81.5%) the adsorptive capacities of these modified cellulose pulps for spilled crude oil decrease with increase in quantity of crude oil spilled. The presence of carbonyl functional group in each of these modified cellulose pulps may be responsible for the discrimation of the absorbent between water and crude oil films floating on water surface.
  I.A. Okoro , C.I. Oriaku and E.N. Ejike
  Concentrations of lead in street dust in selected cities of Aba, Abakaliki, Enugu and Onitsha were determined. The results showed the overall mean lead concentrations for five streets in each of the four Cities selected for the study; Aba (345.99427.12 mg kg 1), Abakaliki (162.15416.24 mg kg 1), Enugu (322.50824.43 mg kg 1) and Onitsha (291.97834.34 mg kg 1). The lead concentrations for each of these four Cities studies correlated positively with commercial, industrial and vehicle traffic emission in these cities.
  I.A. Okoro and E.N. Ejike
  The crude oil absorption behaviour of chemically modified celluloses was investigated. The result showed that only three out of eleven modified celluloses are effective as crude oil absorbents; benzoyl modified cellulose BMC, toluene diisocyanate cellulose TDC, toluenediisocyanate cellulose blown TDCb. These three crude oil absorbents posses the same functional group; the carbonyl. The IR of these three cellulose absorbents showed the presence of carbonyl group 1425.51 cm 1, 1533.06 cm l and 1535.82 cm l, respectively for BMC, TDC and TDCb. The order of crude oil absorptivity are TDCb > BMC > TDC.
  G.O. Onyedika and E.N. Ejike
  The ash of burnt inflorescence of Elaeis guineensis (oil palm tree) was found to contain 99% potassium hydroxide (caustic potash). The crystals of the caustic potash were used to synthesize potassium ethylxanthate (KEX) at optimum temperature of about 45°C. The flotation tests carried out showed that over 200% recovery was achieved during the concentration of galena mineral. Physical characterisation and ultraviolet spectroscopic analysis showed the presence of an alkali xanthate as the collector specie.
  I.A. Okoro and E.N. Ejike
  The ampicillin content (5) if ten different brands of ampicillin capsules in circulation in the onitsha central drug market were determined. Two analytical methods were used; iodiometric and UV-visible spectrophotometric analyses. The results showed that 60% of the different brands of capsules analyzed were within Bp stipulation values where as 40% of the remaining brands of capsules were blow the Bp stipulated values. Two brands; miracillin and polfa brands of ampicillin capsules were completely out of the range of stipulated values. These two brands are therefore, substandard, adulterated and the prevalence of fake, adulterated and substandard ampicillin capsules in this market is a great damager to the health of the entire people of West Africa sub region that depend entirely on this market for their pharmaceuticals.
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