ABSTRACT Background: Hearing Sensitivity is the commonest form of hearing. Occupational hearing loss has received little or no attention in most industries and has left many employees with hearing loss of varying degrees after retirement. The navy has not been spared in this area as some of its personnel exposed to varying levels of noise. This study was carried out to determine the prevalence of hearing loss and to investigate the risk factors associated with hearing loss among naval personn...
ABSTRACT Cleaning is central to any food process operation and it entails the removal of soils from processing equipment, food contact surfaces and production floor. It is done with the aid of a cleaning agent and key among several are the soaps and detergents. Most detergents currently used in the industry are petroleum based, which are not easily biodegradable. Moreover they are imported, and add costs to the operations of industry. The use of locally available material that are biodegradab...
ABSTRACT This study presents the mineralogical, textural and geochemical characteristics of the regional Maastrichtian Ajali Sandstone in Anambra Basin, SE Nigeria. The intent is to highlight possible constraints on the chemical weathering conditions of the source materials on one hand, and to infer the provenance on the other hand. The investigation approach involved field studies and collection of samples from 12 different outcrop locations, followed by laboratory studies involving grain-si...
ABSTRACT Acoustic effects such as absorption/amplification of acoustic phonons, Acoustoelectric Effect (AE) and Acoustomagnetoelectric Effect (AME) were studied in Carbon Allotropes. In this thesis, the Carbon Allotropes considered are Graphene Nanoribbon (GNR), 2-dimensional Graphene sheet, and Carbon Nanotubes (CNT). The Boltzmann transport equation (BTE) and the phonon kinetic equation (PKE) were used. All results were analysed numerically and graphically presented. Using BTE for Armchair...
ABSTRACT The infestation of cashew by Analeptes trifasciata is on the increase and this poses serious threat to cashew cultivation in Nigeria. Base-line information on the distribution and behavioural ecology of A. trifasciata in Nigeria is needed for its control. This study was conducted to provide more information on the morphology, distribution and behavioural ecology of A. trifasciata in Nigeria. A survey of the geographical spread of A. trifasciata infestation was conducted in 25 cashew ...
ABSTRACT Inherited Glucose-6-Phosphate dehydrogenase (G6PD) deficiency in humans results in hemolytic anaemia. The enzyme G6PD provides a crucial link in a series of biochemical reactions which occur in the red blood cell that leads to the steady state accuralation of NADPH, reduced glutathione by glutathione reductase, and the removal of potentially dangerous organic peroxides which, if not scanvenged, may result in the formation of radical species of oxygen which damage the energy generatio...
Abstract Biometric systems have overtime served as robust security mechanisms in various domains. Fingerprints are the oldest and most widely used form of biometric identification. A critical step in exploring its advantages is to adopt it for use as a form of security in already existing systems, such as vehicles. This research work focuses on the use of fingerprints for vehicle ignition, as opposed to the conventional method of using keys. The prototype system could be divided into the foll...
Abstract Merozoite surface protein-119 (MSP-119) specific antibodies which include processing inhibitory, blocking and neutral antibodies have been identified in individuals exposed to Plasmodium falciparum. Here we intend to look at the effect of single and multiple amino acid substitutions ofMSP-119 on the recognition by polyclonal antibodies from children living in Igbo-Ora, Nigeria. This would provide us with information on the possibility of eliciting mainly processing inhibitory antibod...
ABSTRACT The CysF9[93]β sulphydryl group is an indicator for tertiary and quaternary structure change in haemoglobin. Allosteric effectors such as proton and inositol hexakisphosphate (inositol-P6) influence its reactivity. This work was undertaken to study the effects of inositol-P6 and pH on the kinetics and equilibrium of the reaction of CysF9[93]β of dog (Canis familiaris) and donkey (Equus asinus) haemoglobins with 5,5'-dithiobis(2-nitrobenzoate) (DTNB). The number of sulphydryl groups...
ABSTRACT Potable water supply in Ado-Ekiti is inadequate resulting in increased demand for groundwater in the metropolis. Geologically, Ado-Ekiti is underlain by hydrogeologically challenging crystalline basement rocks whose hydraulic properties are characterised by extreme variations over short distances. Prospective groundwater zones are poorly defined in the hard rock terrain. A thorough and definitive evaluation of the overall groundwater resource in such terrain is imperative. This study...
Abstract In the Ibokun area of the Ilesha schist belt of southwestern Nigeria, the dominant rock types are granite gniess and amphibolite. The granite gneiss is medium to coarse grained, with lineation marked by alignment of biotite and microcline porphyroblasts. The amphibolite is commonly massive to weakly foliated, consisting to bluish-green to yellowish-green to sheaf-like aggregate of hornblende set in a fine grain matrix of tabular plagioclase. A total of 25 water samples, obtained from...
Integrated sedimentological and geochemical studies have been carried out on the sediments of the Lokoja and Patti Formations within the southern Bida Basin with a view to deducing the provenance, palaeodepositional characteristics and tectonic history of the sediments. Field observations show that the Lokoja Formation is made up of conglomerates, coarse to medium grained sandstone and claystone while the Patti Formation consists of medium – fine grained sandstone, claystone, shale, siltsto...
ABSTRACT The challenge of accomplishing C-C bond formation while protecting sensitive functional groups and overcoming problems of stereo-control has led to the use of transition-metal organometallic compounds in organic compounds synthesis. Nucleophilic additions to cationic dienyliron carbonyl complexes provide a convenient means of C-C bond formation. It is highly regioselective and stereospecific making it useful for the synthesis of natural products and compounds with biological activiti...
ABSTRACT The use of chemical fertilizers to replenish depleted soil nutrients due to over cultivation and erosion is a common practice. Natural radionuclides in these fertilizers can cause some radiological adverse health effects to animal, through indirect ingestion of fertilizer, including consumption of plants grown with fertilizers. Information on the level of contribution of chemical fertilizers to farm soil radioactivity and radiological health effects in Nigeria are scanty. This study ...
Abstract Background: The emergence of Anopheles populations capable of withstanding lethal doses of insecticides has weakened the efficacy of most insecticide based strategies of vector control and, has highlighted the need for further studies on the mechanisms of insecticide resistance and the various factors selecting resistant populations of mosquitoes. This research targeted the analysis of breeding sites and the oviposition behaviour of susceptible and resistant populations of Anopheles ...