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Recent Submissions
Use of information and communication technology (ICT) tools for mitigating land conflicts in Delta State, Nigeria
(SAAT FUTO, 2021) Ajaero, Joseph Onyewuchi
The study investigated the utilization of ICT tools for mitigating land conflicts in Delta State, Nigeria. Data were collected with structured questionnaire distributed to 120 respondents who were randomly selected. Percentage and mean were used to statistically analyze data. It was found that the following possible ICT devices/tools could be used in the area; computer (99.2%), internet (94.2%), maps/survey plans (89.2%) and internal data capture system (71.7%). Several factors causing land conflicts were double allocation of land (𝑋̅=3.60), inefficiency in delivering land service (𝑋̅=3.55), family boundary disputes (𝑋̅=3.53), corruption/ greed (𝑋̅=3.49), inappropriate use of technology to register lands, (𝑋̅=3.39), inappropriate land tenure systems (𝑋̅=3.27) and communal boundary disputes. It was observed that ICT has a significant role in mitigating land conflicts. The ICT role in land conflicts management is felt in the areas of facilitating easy planning and management, increased awareness on land issues and it ensures security on land tenure system The use of geographical information system (GIS) should be introduced by government to support spatial analysis and visualization, including a map based interface for web information services. Government should introduce Land Information System (LIS) to the land offices at local level to improve efficiency in delivering land services.
Potentials of hyppocratea pallens planch leave extract as inhibition towards the corrosion of mild steel in acidic media
(Der Pharma Chemica, 2012) Akalezi, C.; Enenebaku, C.; Okolue, B.; Oguzie, E.
The inhibiting effect of leaf extracts of Hyppocratea pallens planhc.ex oliv on the corrosion of mild steel in 1.0 M HCl and 0.5 M H2SO4 solutions has been investigated by weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. The effect of temperature on the corrosion and inhibition processes was studied in the temperature range 303-333K. The presence of this plant extract reduced considerably the corrosion rate of mild steel in acidic media and the corrosion inhibition efficiency increased with extract concentration up to 1000 mgL-1. The results suggest that the extract inhibited the corrosion reaction via adsorption of the organic matter on the metal surface, following the Langmuir isotherm and inhibited both the anodic and cathodic partial reactions.
Phytochemistry and antimicrobial properties of gmelina arborea (Verberaceae) ethanolic leaf extract and its secondary metabolites
(MEDWIN Publisher, 2020-12-04) Ijezie, M. K. L.; Ezirim, S.; Azih, I.; Ogukwe, C. E.; Akalezi, C. O.
The aim of this study was to determine the antimicrobial potential of Gmelina arborea ethanolic leaf extract which is used in traditional medicine for treating different ailments such as hallucinations, piles, abdominal pains, burning sensation, diabetes and fever. It is also intended to study its acidic, basic and neutral metabolites with a view to identify the phytochemical compounds responsible for the observed antimicrobial properties. Phytochemical screening was carried out on the airdried ethanolic leaf extract and its secondary metabolites in the Research Laboratory of Phytochemistry/ Chromatography, N4 Alaenyi Street, Owerri, Imo State, Nigeria. The antimicrobial study was carried out using the Agar disc diffusion method and determination of Minimal Inhibitory Concentration (MIC) in the department of Microbiology, Federal Medical Centre, Owerri, Imo State, Nigeria. The ethanol leaf extract and its secondary metabolites (acidic, basic and neutral) were prepared and assayed for antimicrobial activities. The test microorganisms used were Streptococcus spp, Staphylococcus aureus, Salmonella spp, Escherichia coli and Coliform bacilli. Inhibition zone diameter was used as a measure of the antimicrobial activity. The results of the antimicrobial screening of the crude extract and metabolites showed that the crude extract, acidic and neutral metabolites possessed antimicrobial activity to various extents against the microorganisms tested whereas the basic metabolite showed no activity at all. The results showed that the crude extract exhibited its greatest activity against Streptococcus spp, Staphylococcus aureus and Escherichia coli with inhibition diameter of 20 mm at 1.0 mg/ml and MIC of 0.5 mg/ml. The least activity was against Salmonella spp with inhibition zone diameter of 15 mm and MIC of 0.5 mg/ml. The acidic metabolite exhibited its greatest activity against Escherichia coli with inhibition zone diameter of 35 mm at 1.0 mg/ ml and MIC of 0.25 mg/ml. The least activity was against Staphylococcus aureus and Salmonella spp with inhibition zone diameter of 25 mm at 1.0 mg/ml and MIC of 0.5 mg/ml respectively. The neutral metabolite exhibited its greatest activity against Salmonella spp and Coliform bacilli with inhibition zone diameter of 30 mm at 1.0 mg/ml and MIC of 0.5 mg/ml. The least activity was against Staphylococcus aureus with inhibition zone diameter of 22 mm at 1.0 mg/ml and MIC of 0.5 mg/ml. The phytochemical screening results showed the presence of alkaloids, flavonoids, tannins, saponins, cyanogenic glycosides, steroids, carbonyl compounds and carbohydrates. Saponins, carbonyl compounds and carbohydrates were shown to be much higher in concentration than other phytochemicals. The results obtained in this study confirm the antimicrobial properties of Gmelina arborea leaf extract and suggest that this property resides in the acidic and neutral metabolites since the basic metabolite showed no activity at all. The study supports the use of this plant in folk medicine for treatment of ailments such as stomach disorders, healing of wounds, burning sensation and fever.
Inhibition of acid corrosion of mild steel by biomass extract from the petersianthus macrocarpus plant
(U. P., 2013) Akalezi, Chris O.; Enenebaku, Conrad K.; Oguzie, Emeka E.
Inhibitive action of petersianthus macrocarpus leave extract on corrosion of mild steel in 1M HCl and 0.5M H2SO4 solutions was studied using gravimetric, electrochemical impedance and potentiodynamic methods. The results indicated that the extracts functioned as a good inhibitor in both environments and inhibition efficiency increased with extract concentration. Temperature studies in the range 313-333K reveal increase in inhibition efficiency of the extract with rise in temperature. A mechanism of chemical adsorption on the extract components on the surface of the metal is proposed for the inhibition behavior. The adsorption characteristics of the inhibitor were found to obey Langmuir adsorption isotherm.
Enhanced recovery of heavy oil in the Niger Delta: Nelson and Mcneil model a key option for In-Situ combustion application
(Canadian Research & Development Center of Sciences and Cultures, 2025) Ossai, Patrick G. O.; Ohia, Princewill N.; Obah, Boniface; Duru, Ugochukwu I.; David O. Onaiwu
In-situ heavy oil recovery involves several field tested enhanced oil recovery methods/techniques with applicable models. Such field tested techniques include non-thermal oil recovery, hybrid oil recovery and solvent-base oil recovery. The viabilities and field successes recorded by these in-situ heavy oil recovery techniques/methods cannot be overemphasized. But, the main focus of this study is on heavy oil recovery using in-situ combustion with attention on the application of Nelson and McNeil model as documented in the in-situ combustion handbook (Partha, 1999). We subjected data(s) obtained from five (5) heavy oil reservoirs located within the same field in the Niger Delta to the correlations, equations, assumptions and calculations proposed by our study model. This enabled the research team to carry out performance evaluations while considering in-situ combustion implementation using our proposed model. Our result outcomes were further validated with a foreign heavy oil reservoir having similar reservoir properties. Our study results show how viable and profitable (with possible commercial production) heavy oil production from unconventional reservoirs in the Niger Delta would be. Currently, most of the internally generated oil revenue by the Nigeria government is from cheap/light oil obtained from conventional reservoirs (which is fast declining globally).