ABSTRACT The radionuclides present in soil, water and selected foodstuffs taken from all the thirty local government areas of Osun State have been identified and their activity concentrations measured in order to calculate, the absorbed dose, collective effective dose equivalent and committed effective dose for the estimation of the potential biological risk/damage of naturally occurring radionuclides in the State. One hundred and twenty six samples each of soil, water, yam flour, cassava flo...
ABSTRACT In this work, we report on the synthesis of Zinc Oxide (ZnO), by a cost effective and low temperature aqueous chemical method on conducting glass substrates. The grown nanostructures have been characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), optical absorption techniques and Raman spectroscopy. Resistivity of the films was studied with I-V data for the ZnO samples. SEM images show the formation of flower, bud, star,...
ABSTRACT The aeromagnetic data of Ubiaja and illushi area that fall within latitude to and longitude to were interpreted qualitatively and quantitatively. The qualitative interpretation revealed that the area is intensely faulted with major anomalies (faults) trending in the northeast and southwest directions. Standard Euler deconvolution, source parameter imaging (SPI), spectral analysis and modelling (forward and inverse) methods were employed in the quantitative interpretation aimed at det...
ABSTRACT Dye sensitized solar cells (DSSCs) have been under extensive research. Since the color of the device can be easily varied by choosing different dyes and cells on flexible substrates, DSSCs are especially attractive for Building Integrated Photovoltaics (BIPV). The cell concept is believed to reduce the production costs and energy payback time to a large extent compared to standard silicon cells or other thin film cells. Dye sensitizer absorbs the incident sunlight and exploits the li...
Abstract In this research work, sol-gel technique was used to grow some crystals of halide and chalcogenide compounds. These grown crystals were doped with locally produced dopants from bamboo, raffia and potash to see how they can affect the optical and structural properties of the crystals. Dopants were produced from local materials using top down approach where bulk materials (bamboo, potash and raffia) were whittled down through burning into carbon dioxide, water and residual ashes contai...
ABSTRACT The Entrance Skin Dose (ESD) for common radiographic examinations of forty (40) patients was measured prospectively at the Benue State University Teaching Hospital, Makurdi using LiF thermo-luminescent dosimeter (TLD) chips. The examination comprised ten (10) patient’s each of chest, abdomen, pelvic and lumbar sacral regions.The mean ESDs obtained by LiF TLD for Chest X-ray (PA), Plain Abdomen, Lumbar Spine (AP) and Pelvic (AP) were 0.50 mGy, 0.20 mGy, 0.80 mGy, 0.70 mGy respective...
ABSTRACT Solar radiation data at horizontal level, tilted surfaces and in the atmosphere is an important feature in solar energy applications such as photovoltaic systems for electricity generation, solar collectors for heating and passive solar devices. This study presents an investigation of the dependence of global solar radiation incident on a tilted surface on some meteorological parameters for different tilt angles based on measured meteorological data of sunshine, relative humidity and...
A detailed study about Electricity and Magnetism Electric charges and induction, Electric Field and Electric Field Lines, Electric Flux etc.
ABSTRACT Solar radiation data at horizontal level, tilted surfaces and in the atmosphere is an important feature in solar energy applications such as photovoltaic systems for electricity generation, solar collectors for heating and passive solar devices. This study presents an investigation of the dependence of global solar radiation incident on a tilted surface on some meteorological parameters for different tilt angles based on measured meteorological data of sunshine, relative humidity and...
ABSTRACT Biomass is the major energy source in Nigeria contributing about 78% of Nigeria primary energy supply. In this work a comparative analysis of the heating values of saw dust, rice husks, and coconut shell in the thermal generation of electricity was carried out. In the study different masses of biomass were used and the corresponding electromotive force in millivolts obtained. A graph of e.m.f was plotted against mass of each biomass and a gradient was obtained. Bar graphs were plotte...
ABSTRACT Exosmosis and endosmosis verification using white raw eggs have been carried out. Two beakers of dilute hydrochloric (HCl) acid solution were prepared. Two white eggs were placed differently into beakers labelled Beaker A and B respectively containing dilute hydrochloric (HCl) solution and left for five hours. Beaker A (containing Saltwater) was seen as more concentrated than the albumin in the egg. Water molecules moved from a low concentration point (albumin) to the high concentrat...
Abstract Nowadays, ZnO is considered as the most important chemical compounds due their distinctive properties owing to its wide band gab and large exciton binding energy. It is well known that the structural and the optical properties of ZnO differ by different methods of preparation. Therefore, in this work, ZnO power was prepared by two methods, namely sol-gel and combustion method with the aim of comparison. The obtained samples from both methods were investigated by many techniques for c...
Abstract A diagnostic reference level (DRL) is an investigational level used to identify unusual high radiation doses in Nuclear Medicine procedures. DRLs are suggested action levels above which a facility should review its methods and determine if acceptable image quality can be achieved at lower doses. The high specific activity of 99mTc makes it suitable as a first pass agent, for multiple or sequential studies. Is preferred to 99mTc - pertechnetate. A certain amount of radiopharmaceutical...
CHAPTER ONE THE STEAM BOILER 1.0 INTRODUCTION Boilers are pressure vessels designed to heat water or produce steam which can then be used to provide space heating and/ or service water heating to a building. In most commercial heating applications, the heating source in the boiler is a natural gas fired burner. Oil fired burners and electric resistance heaters can be used as well. Steam is preferred over hot water in some applications, including absorption cooling, kitchen, laundries, ste...
ABSTACT This Automation of crime record was developed for Recording crime for the police of Division D in Ilorin Kwara state. This system will help the Nigerian Police of providing information regarding criminals and the various activities they had carried out in the (recent) past, it also will go a long way in helping to checkmate crimes and criminals, this will also help in identifying new cases of crimes within a given locality. The application can record crime, report crime, search fo...