Environmental & Physical Sciences

Research Papers/Topics in Environmental & Physical Sciences

Contributions to Operator Theory and Applications

Abstract This thesis consists of two parts. The first part deals with existerice and approximation techniques for finding solutions of operator equations or fixed points of operators belonging to certain classes of mappings. The classes of mappings studied include the K-posztz~~e definzte operators, the suppressive mappings and accretive-type rntippings. In particular, it is proved that for a real Banach space X, the equation Au = f, f E X, where A is a Kpd operator with the same domain as A'...

Evaluation of the Fuel Properties and Thermal Efficiency of Sub-Bituminous Coal-Biomass Blends

ABSTRACT The improvement of the combustion properties of coal and biomass by blending and carbonization was investigated. Proximate and ultimate analysis of coal, sawdust, corn cob and their blends were carried out using ASTM methods. The proximate and ultimate analyses were repeated on the five blends after carbonization at 500o C for one hour. Ten mixtures of coal-sawdust and coal-corn cob blends were made into briquettes using starch binder. The calorific values of the samples were determi...

Orange Juice Bottling Company, Owerri, Imo State. (Enhancing Functionality Through Circulation and Safety)

ABSTRACT Research has shown that the popularization of plastic bottles in Bottling Industries has remained on the increase since middle of 1960’s, when high-density polyethylene was introduced. They quickly became popular with both manufacturers and customers due to their lightweight nature and relatively low production costs compared with glass bottles. Except for wine or beer, the food industry has almost completely replaced glass with plastic bottles. Despite this innovation, there has c...

Socio Economic Impacts of the Invasive Typha Domingensis on Local Communities Along Nguru Wetlands, Yobe State, Nigeria.

ABSTRACT The study was conducted in the months of July-September 2017 to assess the socioeconomic impacts of the invasive Typha domingensis (Uchytil 1992) on local communities in Nguru, Kakori and Dogon Kuka towns all along the Nguru wetland in Nguru Local Government Area, Yobe State, Nigeria. A total of 171 respondents comprising of local communities and officials of the Hadejia Nguru Wetland Conservation Project (HNWCP) and Komodougu Yobe Basin Wetlands Development Initiative (KYB-WDI) part...

Waste Disposal and Groundwater Quality in JimetaYola Area, Adamawa State, Nigeria

ABSTRACT. Waste disposal and groundwater quality studies were carried out in the Jimeta- Yola area. The area lies between latitudes 9'1 1'N to 9'20'~ and longitudes 12'23'~ to 12'33'~~ and covers an areal extent of about 305km2. Groundwater quality monitoring was carried out through the collection of water samples from hand-dug wells, boreholes and leachates beneath refuse dumps. These samples were analyzed chemically and bacteriologically using atomic absorption spectrophotometer (AAS), DW20...

Impact of Household Solid Waste Disposal Practices on the Environment of Enugu Metropolis, Nigeria.

ABSTRACT This research is aimed at determining the impact of household solid waste disposal practices on the environment of Enugu metropolis. This is with a view to developing appropriate strategies for improving solid waste disposal system in Enugu metropolis. The objectives of the study were to: (i) examine the existing nature of household solid waste disposal practices in Enugu metropolis, (ii) identify the pattern of household solid waste disposal practices, (iii) identify the environment...

Mothers’ Knowledge, Practice of Exclusive Breast Feeding and Anthropometric Indices of Their Infants in Aba South Local Government Area, Abia State, Nigeria.

ABSTRACT This study assessed mothers’ knowledge, practice of exclusive breastfeeding and the anthropometric indices of their infants in Aba south local government area, Abia state, Nigeria. Five hundred (500) lactating mother-child pair randomly selected during their postnatal care visit in six out of seventeen health centers in the LGA participated in the study. Ethical clearance was obtained from the chief medical officer in the LGA and mothers’ consent was sought through the clinic hea...

Evolving the Criteria for Writing Nigerian Architecture History Using Historiographical Approach

ABSTRACT Since independence in 1960, notable works of Nigerian architecture scholars and practitioners have been recorded, but practically little progress has been made in the area of architectural knowledge documentation. Architectural knowledge encompasses a vast array of ideas, which are basically classified into architectural theory, history, criticism, technology, environmental conditions, and these (subcategories) culminate in the material culture of a people. This research focuses on a...

Concentration of Cadmuim, Lead and Chromium in Human Whole Blood

Abstract Human whole blood samples obtained from blood banks in different hospitals in Enugu State were analyzed for cadmium, lead and chromium concentrations using atomic absorption spectrophotometric method. The results of the analysis showed that about 72.7% of the samples had cadmium concentrations more than the limit of safe exposure (5ug/l of blood). Also about 18.2% of the samples had the concentrations of lead to be more than the maximum permissible limit in adult human blood which is...

Quality Characteristics of Underground Water Resources in Nkanu East and Nkanu West Local Government Areas of Enugu State, Nigeria.

ABSTRACT Physicochemical and bacteriological analyses of underground water resources in Nkanu East and Nkanu West Local Government Areas of Enugu state, Nigeria were carried out to evaluate the potability and quality of the rural water supplies and to provide baseline data for future quality assessment. Underground water samples were collected from ten different boreholes in Nkanu East and Nkanu West LGAs. The parameters measured include temperature, colour, pH, electrical conductivity, turbi...

National Cocoa Research Institute Akure Msc(Arch) Design Research Report

PREFACE Research as this thesis is concerned and to other areas in particular, plays a very important role in improvement in all facts of life. Improvements in industry, communication, education and other aspects of science even in agriculture. Started largely from research. For instance the exploitation of minerals both in the sea, the earth’s crust and moon even other outer space exploration could not have been possible without research. Before Nigeria started prospecting oil for commerci...

Sediment Loading and Subsidence in the Niger Delta Sedimentary Basin

INTRODUCTION Geological and geophysical investigations reveal that maximum subsidence of the basement and active downwarping of the lithosphere have occurred around the axis of symmetry of the Niger Delta. A great bulk 6f sediments h~ accumulated:in this sedimentary basin stn~~ Tertiary, and during the period of accumula- . tion, vertical tect()nic movementS took place. This is evidenced by the presence of shallow water sediments ia deeper parts. of the basin. It is obvious from the overall t...

Urban Design of Open Common Spaces in Khartoum State

Abstract Open urban spaces in residential areas in Khartoum; suffer from severe neglect and violation because of the obvious infringement and desertion, so it is not used for cultural, social, recreational and environmental purposes which are supposed to achieve as required. Open urban spaces established in order to gain a unique situation and realize beauty, elegance and glory in urban interfaces and create pleasant, beautiful and comfortable places to perform a range of useful activities th...

Studies of the Drying Performance of Melon and Rubber Seed Oils.

ABSTRACT Oxygen absorption studies of blends of oils of seed s eed melon~(~SD), rubber (RSO) and linseed (LSD) have been L carried out at room temperature in order to optimise the drying performance of MSO and RSO. A manometer was used to measure O2 absorbed. The set-to-touch time ( STTT) of o i l o r o i l blend was measured after 3 hours of O2 absorption and 18 hours of ageing. Addition of LSO to MSO reduced its STTT from 12.25 hours to 4.0 hours at 50/50; this compares favourably with the ...

Nutrients, Phytochemical Compositions of Hibiscus Cannabinus, Adansonia Digitata, Sesamum Indicum, Cassia Tora Leaves, Their Hypoglycemic Activity and Lipid Profile in Alloxan-Induced Diabeti

ABSTRACT The study investigated the nutrients and phytochemical compositions of some leafy vegetables in Nigeria (Hibiscus cannabinus, Adansonia digitata, Sesamum indicum and Cassia tora leaves) and the effects of their extracts on blood glucose and lipid profile of alloxan induced diabetic rats. Two kilogrammes of each of the vegetables were bought fresh, sorted by removing extraneous material, washed with deionized water and separately pulverized using Gallenkamp mixer Kenwood –MPR 201. A...


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