Electrochemical Investigation of the Inhibitory Action of Ciprofloxacin Drug on the Acid Corrosion of Mild Steel

Electrochemical investigation of mild steel corrosion in acidic medium inhibited by an environmentally safe and commercially available low cost drug, ciprofloxacin, was carried out at room temperature. The results obtained show that the drug provided a good protection for mild steel in the acid medium investigated. The inhibition efficiency was found to increase with a corresponding increase in the concentration of the drug. The adsorption process that facilitated the inhibition mechanism was found to follow the Langmuir’s adsorption isotherm. Keywords: linear polarization resistance (LPR), corrosion inhibition, mild steel, ciprofloxacin dru

Solutions of Schr\"odinger Equation with Generalized Inverted Hyperbolic Potential

We present the bound state solutions of the Schr\"odinger equation with generalized inverted hyperbolic potential using the Nikiforov-Uvarov method. We obtain the energy spectrum and the wave function with this potential for arbitrary - state. We show that the results of this potential reduced to the standard known potentials - Rosen-Morse, Poschl - Teller and Scarf potential as special cases. We also discussed the energy equation and the wave function for these special cases.Comment: 20pages, 5figure

Electrochemical Linear Polarization Studies of Amodiaquine Drug as a Corrosion Inhibitor for Mild Steel in 0.1M HCL Solution

The effect of amodiaquine on corrosion of mild steel in hydrochloric acid was investigated by linear polarization resistance (LPR) electrochemical method. The results indicated that corrosion inhibition efficiency and degree of surface coverage were increased with rise in the concentration of amodiaquine. The inhibitor followed monolayer chemisorption since it obeyed the Langmuir adsorption isotherm. Keywords: linear polarization resistance (LPR), amodiaquine drug, corrosion inhibitor, mild steel, HC

The Relationship between Enterprise Risk Management (ERM) and Organizational Performance: Evidence from Nigerian Insurance Industry.

Modern business environment is embroiled with business risks which can have a negative impact on an organization existence and success. The business risks represent the threats to the ability of an enterprise to execute business process and create customer value. These risks are multifaceted and cut across operational, strategic, systemic and reputational. Insurance business being an enterprise is also faced with these risks. This study aims at finding out whether the management of these integrated risks through enterprise risk management (ERM) can lead to organizational performance in Nigerian Insurance industry. Using purposive sampling technique, ten (10) general insurance companies were selected from forty nine (49) companies operating in Nigeria. Contingency reserve, shareholders’ fund, gross premium and net premium were used as dummies for ERM indicators. Panel data was adopted for a ten year period of 2001 to 2010. The study reveals that there is joint cause relationship among ERM variables and organizational performance though, individual relationship of the indicators differ. It is recommended that the Nigerian insurance industry should adopt ERM practice in order to boast organizational performance and by extension increases organization’s reputation. Keywords: Insurance, Risk Management, Enterprise Risk Management, Corporate Performanc

Coconut Coir Dust Ion Exchange Resins for Removal of Ni2+ ion from Aqueous Solution

The ability of coconut coir dust, a natural adsorbent made from dried coconut husk as a non conventional and low cost sorbent for the removal of Ni2+ from aqueous solution was examined. The adsorption capacity was found to be dependent on the contact time and initial concentration which increased along with contact time and initial ion concentration but latter decreased with 15mg/L for the three resins (coconut coir dust (CCD), carboxylated toluene resin (CTR), and sulphonated toluene resin (STR)). Maximum adsorption was obtained after a contact time of 90minutes at an initial concentration of 15mg/L. The results were analyzed by Langmuir and Flory-Huggins isotherm. The sorption process was best described by Langmuir isotherm which indicates monolayered adsorption and chemisorption. Adsorption was found to follow pseudo-second order kinetics with average rate constant of 1.3287g/mg min. Adsorbents obtained from coconut can be used as sorbent for removing metal ions from aqueous solution. Keywords: Adsorption, coir dust, ion exchange, Ni2+ions, kinetics, isotherm

Adaptive Response Strategy of Farmers to Changing Rainfall Averages in Parts of South-Eastern Nigeria

The variable and changing nature of the annual rainfall regime in the study area poses the main problem for which planet responses are needed. The study is conducted with an estimated population of six thousand (6000) food croppers from Abia, Akwa Ibom and Cross River States. Three thousand (3000) respondent farmers are then drawn from six (6) agro-ecological zones, two from each of the sample states at five hundred (500) respondents per zone. Two hundred and fifty (250) farming households and finally sampled from the zones resulting in the one thousand five hundred (1500) sample that the study is based. Statistical evidence indicates that the awareness level of the peasants to the issue is significant at the 95% level of confidence. The main response strategies from analysis include the application of chemical fertilizers, the use of crop verities and changing the time of farming. The main change stimuli, however are higher annual intensities and declines in the duration. Response strategies however vary significantly across the study space at 95% probability. Cross River State, the more vulnerable to the threat is suggested to be the source of the significant variation following the Scheffe Post HOC analysis. Keywords: climate change response stimuli, response strategy, reactive response

The Challenges of Human Security in Sub-Saharan Africa: The Way Forward

The increased interaction of societies on a global dimension evidently provides for the overall need for human security especially in the African continent where the number of conflicts is still overwhelming. This paper examined the challenges of human security in Sub-Saharan Africa with a view to suggesting the way forward. Anchored on a qualitative method and with reliance on secondary sources of data, it argued that there is need to better understand the nature of the rapidly evolving large-scale challenges that can have a major impact on individuals and populations. The paper further observed that it is imperative to strengthen the mobilization of wide range of actors involved in policy formulation that affects the unfolding dangers of human security in order to curtail them. It recommended the promotion of human capacity building in African states, assistance to states in the region to tackle HIV/AIDs and other contagious diseases, promoting the active participation of communities and representatives of civil society in the planning and implementation of development programs among others and concluded that though the challenges of human security in the continent are overwhelming, a proper implementation of these measures could ensure security for the vulnerable populations in the region

Appraisal of the magnetic and geothermal anomalies of bornu basin northeast nigeria involving aero-magnetic data

The Bornu Basin in northeast Nigeria was studied using high-resolution airborne magnetic data with the objective of improving the reliability of mapped magnetic and geothermal anomalies, and depth solutions. Necessary enhancement operations like analytic signal (ASIG), upward continuation, depth assessment methods involving standard Euler deconvolution (SED) and source parameter imaging (SPI) as well as spectral analysis applying the centroid technique were applied. The middle and southern parts are dominated by high frequency anomalies as revealed by the ASIG map. Furthermore, the magnetic data, when upward continued to 5 km, revealed avalanche of deeply buried igneous intrusions that created near-surface magnetic sources and geologic structures. Maximum thicknesses of sedimentary series estimated from SED and SPI, are respectively ~5974.7 and ~5885.3 m. These values correlate correlated relatively well with depth to the top boundary (Zt) of ~6550 m obtained from the centroid technique. These depth estimates reveal sequence of thick sediments overlying igneous intrusions and falls under the prospective geothermal anomaly zones characterised by high geothermal gradient (GG) (>55 °C/km) and heat flow (HF) (>130 mW/m2) values. Areas characterised by high geothermal anomalies correspond to igneous intrusion-dominated shallow Curie point depths (CPD or Zb)