ABSTRACT New series of four, (Z)-5-(4-chlorobenzylidine)-2-(Aryl/Substituted arylimino) thiazolidin-4-one and one (Z)-5-(4-chlorobenzylidine)-3-(2,5- dichlorophenyl)-2-iminothiazolidin-4-one were successfully synthesized from aryl/substituted aryl amines by employing nucleophilic substitution reaction with chloroacetyl chloride to form chloroacetamide. The formed acetamides were nucleophilically reacted with potassium thiocyanate coupled with Cyclization to form N-substituted thiazolidin-4-o...
Abstract: The impact of soil properties, temperature and relative humidity on arthropod species composition, abundance and diversity was investigated in Apete and Aba-eku dumpsites and in a control site in Ibadan, Oyo state, Nigeria. Ten 250g size pitfalls one third filled with 5% formalin were placed in each point in order to trap and preserve the arthropods. The arthropods trapped in each pitfall were preserved in separate specimen bottle containing 70% ethanol before identification. A tota...
Abstract The study aimed to use statistical techniques to measure the quality of services produced by Said Salim Bakhresa & Co Ltd. The study was conducted among wholesalers and bakeries that sell wheat flour produced by the company. These were selected from four different locations representing the major towns where wheat flour and its products are widely consumed. These are Dar es Salaam, Morogoro, Arusha, Moshi, and Tanga. The sample size for the study was 434. The study employed the cross...
ABSTRACT A large number of hetero-aromatic and carbonyl molecules are useful in pharmaceutical and dye industries. Studies of their transition dipole moment (Δμ) and transition polarizability (Δα) are important because they determine their solubility and usefulness. Experimental determination of these parameters and other electronic properties such as oscillator strength (f) using Solvatochromic Shift Equations (SSE) has proved to be unreliable. This is due to the large spread in their re...
ABSTRACT Metal complexes have interesting properties and varied applications in light emitting diodes. A number of substituted pyridine metal (Rhenium, Ruthenium and Iridium) complexes have been synthesised and characterised. However, the synthesis and characterisation of substituted pyridine iron complexes such as Tricarbonyl (1-4-η- pyridino-cyclohexa-1,3-diene) iron complexes for its light emitting property remain scanty. Therefore, this research was designed to synthesise, characterise a...
ABSTRACT Methicillin-resistant staphylococcus (MRS) infections are of global concern in healthcare institutions and community settings with significant morbidity and mortality due to multidrug resistance challenges. In Nigeria, most methicillin resistance detection was based on phenotypic method with scanty reports on molecular characterisation of MRS. In this study, molecular techniques were used to determine the presence of methicillin resistant gene (mecA) with its associated resistance de...
ABSTRACT Methicillin-resistant staphylococcus (MRS) infections are of global concern in healthcare institutions and community settings with significant morbidity and mortality due to multidrug resistance challenges. In Nigeria, most methicillin resistance detection was based on phenotypic method with scanty reports on molecular characterisation of MRS. In this study, molecular techniques were used to determine the presence of methicillin resistant gene (mecA) with its associated resistance de...
A B S T R A C T The physiological activities of Bacillus species that ferment African locust bean (Parkia biqlobosa (Jacq.) BenthJ to produce ' iru1 were investigated. The strains studied belong to the B. subtillis group and Were designated BS1 , BS2, BS3, BLl, BL2, BL4 and BP2. These seven strains showed significant differences (at c* = 0.05) in gtowth and extracellular proteinases production. The following (defecending) Order was obtained for the growth of the organisms in liquid medium: BS...
ABSTRACT Untreated industrial effluents discharged into land and surface water are of great environmental concern. Previous studies on physicochemical characteristics of effluents and sediments from discharged points of various industrial sectors in Lagos metropolis are inadequate in scope, duration, chemical treatment options and estimated pollutant discharge load which are of importance in waste water management. This study was designed to investigate the physicochemical characteristics of ...
ABSTRACT Changes in vegetation or land use that affects soil respiration are a major concern for global climate change. Bush clearing in north-central Namibia has been used as a solution to problems of bush encroachment. However, the effect of bush clearing on soil processes, such as the carbon cycle and soil CO2 efflux has not yet been quantified in Namibia. The main aim of this study was to determine and compare the amount of soil respiration between the cleared and uncleared sites at dif...
ABSTRACT The purpose of this study was to find out the appropriate probability distributions that fit suitable to the motor insurance claims in respect of motorcycles, cars, and heavy vehicle insurance claimed amounts. The specific objectives were: to estimate the probability distributions considered, to identify appropriate model that fit best to the motor insurance claims amounts among eight distributions and to test the goodness of fit of the fitted probability distribution models. Daily ...
ABSTRACT This study aimed at investigating the teaching of Biology and Physical Science practical works in Senior Secondary schools in the Zambezi Region, Namibia. The study was guided by four questions: 1. Did the teaching of Biology and Physical Science practical works in Senior Secondary schools in the Zambezi region follow the learning objectives outlined in the subjects’ curricula?; 2. What practical skills do the Biology and Physical Science teachers aim to achieve from the practical...
Abstract. We generate two new exact models for the Einstein–Maxwell field equations. In our models, we consider the stellar object that is anisotropic and charged with linear equation of state consistent with quark stars. We have a new choice of measure of anisotropy that is physically reasonable. It is interesting that in our models we regain previous isotropic results as special cases. Isotropic exact solutions regained include models by Komathiraj and Maharaj; Mak and Harko; and Misner ...
ABSTRACT Network Vulnerabilities are weaknesses that allow attackers to bypass communication systems or network security. This grants the attackers access to crucial information on victim’s computer systems. So, analysis of network vulnerabilities is highly recommended as it helps to identify them in order to ensure a secured network. The experiments for this study were carried out on three networking environments. The first one was the CIVE LAN (as the main target), the second one was the...
Abstract Stated preference (SP) experiments are becoming an increasing popular survey methodology for investigating air travellers’ choices. Analysis of this behaviour, which is an element of the demand prediction, helps for a better future planning and development of competing airlines. In this thesis, emphasis is stressed on the stated preferences of passengers in choosing between low-cost carriers (LCC) and full-service carriers (FSC). Binary logit and probit model and latent class mode...