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Search Results: 1 - 10 of 239053 matches for " E.I Ugwu "
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Theoretical Analysis of the Influence of the Thermal Diffusivity of Clay Soil on the Thermal Energy Distribution in Clay Soil of Abakaliki, Nigeria
E.I Ugwu
Research Journal of Applied Sciences, Engineering and Technology , 2010,
Abstract: The influence of the thermal diffusivity of clay soil on thermal energy distribution in clay soil was studied using one and two dimensioned heat equation, which was solved, by using separation of variables method. In the analysis, heat was assumed to be propagated along rectangular moldedclaywithlength(L)with the width being considered negligible in the case of one dimension with different temperature ranging from 350 to 1290oC within zero to one minute chosen where some parameters such as thermal diffusivity In the second case, a steady state heat flow was considered in two dimensions w ith the assumption that temperature distribution is constant. Different temperature ranging from 350 to 1290oC within zero to one minute were chosen with some parameters such as thermal diffusivity, specific heat and m ass per unit length of the clay are specified. The variation of the thermal conductivity and diffusivity with temperature was analyzed while that of the energy flux, u(x,t) variation with time for different chosen length were plotted Two dimensional thermal energy distribution viewed at different points was also considered using different values of therm al diffusivity respectively.
Abnormal findings on dipstick urinalysis of out-patients with malaria in Abakaliki, Nigeria
E.I. Ugwuja , N.C. Ugwu
Journal of Vector Borne Diseases , 2011,
Abstract: Background & objectives: Malaria, one of the major health challenges of the tropics affecting about 500million people, particularly the children and pregnant women have been associated with changes in urinecompositions. The present study was undertaken to document the urinary abnormalities in malaria patientsbased on malaria species and the level of malaria parasitaemia.Methods: Febrile patients (n = 365) with positive Giemsa-stained blood films for malaria recruited from Outpatient Department of Ebonyi State University Teaching Hospital, Abakaliki participated in the study. Patientswere classified into two categories (+ and ++) based on parasite density. Apparently healthy individuals(n = 81), without malaria parasite on both thick and thin films of comparable age and gender acted as controlgroup. Urine sample (10 ml) was collected from each participant and analysed using standard laboratorymethods and techniques.Results: Seventy-four (20.3%) of the patients had Plasmodium falciparum malaria. Although all the urineparameters were higher in the malarial patients in comparison to the control, only bilirubinuria andurobilinogenuria were statistically significant (p <0.05). Also, bilirubinuria, urobilinogenuria, haematuriaand proteinuria were significantly (p <0.05) higher in P. falciparum infection than in infections with othermalaria species, but only in P. falciparum infection, bilirubinuria and urobilinogenuria were significantly (p <0.05) higher at higher parasitaemia.Conclusion: Even though positive blood film for malaria parasite remains the gold standard for the diagnosisof malaria, urinary abnormalities, such as bilirubinuria, urobilinogenuria, proteinuria and haematuria may aidin identifying patients with severe malaria parasitaemia, especially the falciparum malaria.
Adsorption Density and Spectra Distribution of Adsorbed Lysozyme as a Function of pH and Temperature
C.E. Ekuma,E.I. Ugwu,N.E. Idenyi
Journal of Applied Sciences , 2006,
Abstract: A study of the adsorption density and spectra distribution of adsorbed lysozyme (protein) from aqueous solutions unto silica and polystyrene surfaces has been carried out as a function of pH and temperature respectively. The maximum adsorption of lysozyme on both surfaces occurred at the pH range of 10.0 to 12.0 with a peaked value at 11.0. This behaviour showed that lysozyme (protein) has maximum adsorption around its isoelectric point of pH 11.0. The spectra of the adsorbed lysozyme were observed for varying temperature values on the two surfaces. The spectra showed maximum absorbance of 0.8020 at 20°C for silica and 0.7860 at 50°C for polystyrene at the same wavelength of 500 nm. The minimum absorbance occurred at the same wavelength of 600 nm and temperature of 40°C corresponds to the minimum absorbance of 0.004 for silica and 0.028 for polystyrene. Comparatively, minimum absorbance occurred at the same wavelength and temperature for both surfaces, but in contrast, maximum absorbance, though occurred at the same wavelength, but at different temperature; a phenomenon attributed to the non-synthetic nature of silica and synthetic nature of polystyrene surfaces.
Analysis of Wave Propagation in a Homogeneous Dielectric Crystal
E.I. Ugwu,A.S. Olayinka,F.I. Olabode
Journal of Engineering and Applied Sciences , 2012,
Abstract: Wave propagation through crystal was analysed using wave equation in conjunction with pseudo-dielectric function. Considered in the analysed were the patterns of propagated wave for UV, visible and near infrared for a particular value of dielectric constant of the crystal. The relationship between wavenumber and refractive, optical conductance and absorption co-efficient were analysed. The effects of focusing angle on the crystal for various wave-length regions were also considered.
Effects of Thermal Annealing on the Optical Properties of Titanium Oxide Thin Films Prepared by Chemical Bath Deposition Technique
H.U. Igwe,O.E. Ekpe; E.I. Ugwu
Research Journal of Applied Sciences, Engineering and Technology , 2010,
Abstract: A titanium oxide thin film was prepared by chemical bath deposition technique, deposited on glass substrates using TiO2 and NaOH solution with triethanolamine (TEA) as the complexing agent. The films w ere subjected to post deposition annealing under various temperatures, 100, 150, 200, 300 and 399oC. The thermal treatment streamlined the properties of the oxide films. The films are transparent in the entire regions of the electromagnetic spectrum, firmly adhered to the substrate and resistant to chemicals. The transmittance is between 20 and 95% while the reflectance is between 0.95 and 1%. The band gaps obtained under various thermal treatments are between 2.50 and 3.0 ev. The refractive index is between 1.52 and 2.55. The thickness achieved is in the range of 0.12-0.14 :m.These properties of the oxide film make it suitable for application in solar cells: Liquid and solid dye-sensitized photoelectrochemical solar cells, photo induced water splitting, dye synthesized solar cells, environmental purifications, gas sensors, display devices, batteries, as well as, solar cells with an organic or inorganic extremely thin absorber. These thin films are also of interest for the photooxidation of water, photocatalysis, electro chromic devices and other uses.
Effects of Aqueous Extract of Spices Mixture Containing Curry, Garlic and Ginger on Plasma Glucose and Lipids in Alloxan-induced Diabetic Rats
E.I. Ugwuja,A.N. Nwibo,N.C. Ugwu,C. Aloke
Pakistan Journal of Nutrition , 2010,
Abstract: With increasing use of spices worldwide in the face of increasing burden of Diabetes Mellitus (DM), especially type 2, coupled with claims about the favourable effects of spices on some health conditions, the present study investigated the effect of aqueous extract of spices mixture containing curry, garlic and ginger on plasma glucose and lipids in alloxan induced diabetic rats, a type 2 DM model. The animals were assigned into six groups (I-VI) of six animals per group. Group I-III animals were made diabetic by intraperitoneal administration of alloxan while group IV-VI were non diabetic. Groups I & II and V & VI were administered 300 mg and 600 mg/Kg body weight respectively, of the extract by oral compulsion for four weeks while groups III and IV acted as diabetic and non-diabetic control respectively. Plasma glucose and lipid profile were analyzed by standard laboratory methods. The extract had no significant effect on body weights of the animals irrespective of their diabetic status. However, the extract had significant (p<0.05) hypoglycaemic effect on both diabetic and non-diabetic rats, with plasma glucose lower in the groups (diabetic and non-diabetic) treated with 600 mg/kg body weight of the extract in comparison to those treated with 300 mg/kg body weight (4.43±0.56 vs. 5.03±0.50 and 4.08±0.13 vs. 4.41±0.22 mmol/l respectively). While plasma High Density Lipoprotein-Cholesterol (HDL-C) was comparable among the animal groups, plasma Total Cholesterol (TC), Triglyceride (Tg) and Low Density Lipoprotein-Cholesterol (LDL-C) were significantly (p<0.05) lower in the groups (diabetic and non-diabetic alike) treated with the extract when compared with those untreated. This effect however appeared to be abolished at higher concentration of the extract as evidenced by lower decreases in the lipid fractions at the concentration of 600 mg/kg body weight against that at 300 mg/kg body weight. In conclusion, intakes of curry, garlic and ginger concurrently at culinary dose exerts beneficial effects on plasma glucose and lipids in health and disease. It also reaffirms the safety of spices combinations as practiced currently.
Serum Zinc and Copper Levels in Malnourished Pre-School Age Children in Jos, North Central Nigeria
E.I. Ugwuja,K. O. Nwosu,N. C. Ugwu,M. Okonji
Pakistan Journal of Nutrition , 2007,
Abstract: Serum zinc and copper were determined in thirty (30) malnourished pre-school-age children (age, 0-60 months) and thirty (30) age-and sex-matched apparently healthy well nourished controls to evaluate the effect of protein-energy malnutrition on serum zinc and copper. Mean serum zinc and copper were significantly reduced (p<0.05) in malnourished than in well-nourished children. While serum total protein was significantly lower (p<0.05) in malnourished than the controls, and comparable (p>0.05) among kwashiorkor and marasmus, serum albumin was significantly lower (p<0.05) in kwashiorkor than in marasmus. Mean haemoglobin concentration was significantly (p<0.05) lower in malnourished than in the controls while total white blood cell count (TWBC) did not differ significantly (P>0.05). This study shows that malnourished children have deficient serum zinc and copper with anaemia and leucopenia. For effective management of protein-energy malnutrition, zinc and copper supplementation should be part of treatment regimen, however, in order to prevent zinc and copper deficiency and its health implications in pre-school age children, food fortification should be promoted.
The Effect of Change in Refractive Index on Wave Propagation Through (FeS2) Thin Film
E.I. Ugwu,P.C. Uduh,G.A. Agbo
Journal of Applied Sciences , 2007,
Abstract: Wave propagation in inhomogenous feS2 film was studied and the influence of the change in the refractive index introduced as a perturbation on EM wave propagating through the film. The solution of the scalar wave equation was obtained first using series expansion solution method of Green’s function with appropriate boundary condition. The result was written as sources of two fields where the second term was considered to be correction term due to the perturbation or small change in the refractive index. The influence of large step in refractive index and surface impedance offered by the film medium to the propagating wave was discussed.
The intercorrelation of the amino acid quality between raw, steeped and germinated guinea corn (Sorghum bicolor) grains
E.I. Adeyeye
Bulletin of the Chemical Society of Ethiopia , 2008,
Abstract: Levels of amino acids were determined in the grains of guinea corn, Sorghum bicolor (L.) Moench. The steeped sample was best in His, Arg, Thr, Ser, Pro, Gly, Ala, Met, Cys, Val, Phe and Tyr contents whereas germinated sample was best in Lys, Asp, Glu, Leu and Ile. The total amino acid contents were: steeped [57.71 g/100 g crude protein (c.p.)], germinated (53.37 g/100 g c.p.) and raw (37.91 g/100 g c.p.) with respective essential amino acids of 30.70 g/100 g c.p., 28.33 g/100 g c.p. and 21.48 g/100 g c.p. Percentage cystine/total sulfur amino acid (% Cys/TSAA) trend was 72.0 (steeped) > 71.1 (germinated) > 58.9 (raw). The Predicted Protein Efficiency Ratio (P-PER) levels were 0.23 steeped, 0.29 (germinated) and none (raw). The Leu/Ile ratio was 0.42 for steeped, 0.38 for germinated and 0.24 for raw grains. The limiting amino acid was Leu for all the samples with 0.30 (steeped), 0.31 (germinated) and 0.16 (raw). The two treatments enhanced the quality of the guinea corn amino acid levels. However, no significant differences occurred between raw/steeped, raw/germinated and steeped/germinated samples at p <0.05. KEY WORDS: Amino acid quality, Raw, Steeped, Germinated, Guinea corn Bull. Chem. Soc. Ethiop. 2008, 22(1), 11-17.
Methicilin-resistant Staphylococcus aureus (MRSA) at Jos University Teaching Hospital.
E.I. Ikeh
African Journal of Clinical and Experimental Microbiology , 2003,
Abstract: A prospective surveillance of Methicillin resistant staphylococcus aureus (MRSA) was carried out at Jos University Teaching Hospital, Nigeria, over a one year period. This study highlights the continuos importance of MRSA in causing both hospital and to a less extent community acquired infections. Out of the 180 consecutive isolates of S. aureus tested, 758 (43%) were found to be methicillin resistant, 81% (63 isolates) of the MRSA were from hospital in-patients while 19% (15 isolates) were from out-patients. The highest rate of methicillin resistance (81%) was found in surgical wound infections while the special care baby unity (SCBU) service recorded 4%. 85% of the MRSA were sensitive to Ofloxacilin while 46% were sensitive to peflacine. Most MRSA isolates were multiply resistant to Augumentin, centriaxone and ceftazidime, thus confirming the nosocomial nature of the isolates. Vancomycin and teicoplanin are not locally available and so ofloxacillin is the drug of choice. This study has demonstrated a high prevalence of MRSA in our hospital, which definitely plays a significant role in hospital acquired inflections. In conclusion, the relatively high prevalence of MRSA in this study has shown that there is a “limited” level of infection control activity in our hospital. (Af. J. of Clinical and Experimental Microbiology: 2003 4(1): 52-55)
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