Natural & Applied Sciences

Research Papers/Topics in Natural & Applied Sciences

Synthesis and Characterisation of Alkylated Isocyanate Derivatives of [Pt2(µ-S)2(Pph3)4]

ABSTRACT The highly nucleophilic bridging sulfide centers in bis(μ-sulfido)tetrakis(triphenylphosphine) diplatinum(II), [Pt2(µ-S)2(PPh3)4] enables the incorporation of any organic functionality (R) through facile monoalkylation to form cationic complex [Pt2(µ-S)(µ-SR)(PPh3)4] + . The organic electrophiles; N,N’-(2-dichloroethyl) piperazine-4-carboxi-amine, N-(2-chloroethyl) morpholine4-carboxi-amine, and N-(2-chloroethyl)-1-methylpiperazine-4-carboxi-amine derived from isocyanate were s...

Integer Programming approach to Staff Scheduling of Resource Persons to a Polytechnic: A case study of NBTE’s Accreditation team

Abstract In this work,we applied an Integer Programmingapproach to schedulingof resource persons on National Board for Technical Education (NBTE) accreditation team to a Polytechnic. The level of compliance of the institution to national minimum benchmark for academic standards with respect tostaff mix was deduced.The use of Integer Programming approach and Lingo software in solving the model developed, resulted in considerable drop in accreditation cost from four million, seven hundred and f...

Characterization of Avian Pathogenic Escherichia Coli and Extended Spectrum Beta-Lactamase Producing Escherichia Coli Isolated from Chickens in Enugu State, Nigeria.

ABSTRACT The aim of this study was to characterize avian pathogenic Escherichia coli (APEC) and extended spectrum beta-lactamase (ESBL)-producing Escherichia coli strains isolated from chicken in Enugu State, Nigeria. Dead and moribund chickens collected from twenty four farms in 6 LGAs of the state and organ samples from chicken submitted to our departmental necropsy unit were used for the study. A total of 182 samples comprising of 100 broiler and 82 layers diagnosed of colibacillosis were ...

Virtual University Administration (Personnel Management)

ABSTRACT Personnel department is service-oriented towards staff and entails day-to-day activities of units some of whose functions overlap and involves recruitment of staff, retirement of staff, termination of appointment, processing of request for sabbatical leave, staff training and development, pension funds administration, health management organization, etc., and will be easier, faster and secure adopting a virtual approach rather than its manual counterpart. This project work will estab...

Formulation and Evaluation of Some in Vitro and in Vivo Properties of Artemether-Loaded Self Emulsifying Drug Delivery System

ABSTRACT The aims of this research work were to formulate artemether-loaded self emulsifying drug delivery system (SEDDS), evaluate some of its in vitro and in vivo properties, and prevent drug precipitation through supersaturation approach. The solubility of artemether (ARM) in various oils, surfactants and cosurfactants was determined using the equilibrium solubility method. Vehicles such as Triacetin®, Labrasol® and Transcutol P® were selected as components of the formulation due to the...

Geological and Geotechnical Assessment of Some Derelicit Barite Fields in the Abakaliki Basin, Southeastern Nigeria

ABSTRACT The proliferation of abandoned surface excavations in the Benue Rift not only contributes to land degradation and landscape disruption but also results in loss of economic deposits, dearth of mining data and generation of unprotected spoils with known potential to contaminate ground and surface water sources. This study employed field description and measurements, laboratory testing and numerical simulation techniques to evaluate some derelict barite fields in the rift with the aim o...

Characteristics of Traditional Snacks Produced from Citrullus Vulgaris S, Glycine Max L, Arachis Hypogea L and Sclerotium Tuberygii

Abstract Melon snack was produced by the conventional method in which melon and ground yeast was used as the main ingredients, in addition to other ingredients. The proportion of melon and ground yeast were varied while the other ingredients were kept constant so as to determine the best combination that would give a good quality snack. The combination of 70% melon, 8.81% ground yeast and 21.19% other ingredients was used as the control sample, since this combination formed the best dough nee...

Methodological Models for Optimal Control of Marine Oil Spill

Abstract The frequency of accidental discharge of oil into aquatic environment has presented a significant threat to marine biota with related adverse effects on the supply of products and services of importance to human cultures. This threat of economic and environmental devastation led to the development of a number of monitoring and clean-up alternatives such as remote sensing and chemical dispersants, respective. This study proposed a new possible research direction in marine oil spill mo...

Environmental Implications of Sewage Disposal Methods in Enugu Metropolis, South-Eastern Nigeria.

ABSTRACT A questionnaire and observational study were randomly conducted on 204 houses to acquire information on different sewage disposal methods used in Enugu metropolis, and to investigate the impact of the sewage disposal methods on available water supplies. The results obtained show that 51% of the resident’s wells are located at a distance less than 9m from the toilets. Samples from 21 different locations in the area were analyzed and studied in order to assess the quality of the grou...

Influence of Stabilizers on the Fermentation Rate and Nutritive Value of Set Yoghurt

ABSTRACT Stabilized yoghurt samples were produced by reconstituting powdered milk in water along with sugar and 0, 0.5 and 1.0 % concentrations of carboxyl methyl cellulose (CMC), Corn starch and gum acacia before fermentation. The yoghurt samples were either produced as short set yoghurt by incubating at 42 oC for 5 hours or incubating at 30 ± 2 oC (room conditions) for 24 hours as long set yoghurt. Samples were analyzed at intervals of 1 h for 5 h for the short set yoghurt and at intervals...

Fractional Mechanical Oscillator

TABLE OF CONTENTS Title Page i Certificate of Approval ii Dedication iii Acknowledgment iv Abstract v Table of contents vi 1. FRACTIONAL ORDER CALCULUS 2. FUNCTIONS OF FRACTIONAL CALCULUS 2.1 The Gamma function 3 2.2 The Beta Function 5 2.3 The Mittag-Leffler Function 5 2.4 Laplace Transform 7 2.5 The Convolution Theorem 9 2.6 Riemann-Liouville Fractional integral 10 2.7 Riemann-Liouville Fractional derivative 13 2.8 The Caputo’s Fractional Derivative 14 2.9 Laplace Transform of Fractional ...

Sexual Behaviors of People Living with Hiv/Aids, Receiving Treatment at District Hospital Agbani, Enugu State.

ABSTRACT HIV/AIDS is still of major public health concern. With no vaccine in sight, it is only necessary to take a look at the sexual behaviors and practices of people living with HIV/AIDS. This study was to determine the sexual behaviors of people living with HIV attending ART clinic at District Hospital, Agbani, Nkanu-west local government area, Enugu state. METHODOLOGY: This was a descriptive cross sectional study. A systematic random sampling method was used to select 321 participants. D...

On Optimal Complete Replicated Rotatable, Orthogonal, Efficient and Relative Efficient Central Composite Designs

ABSTRACT Replication is the repetition of the treatments under investigation to different experimental unit. Replication is essential for obtaining a valid estimate of the experimental error and to a greater extent, increasing the precision of estimating the pairwise difference among the treatment effects. It is on this note that when full replication (replication of cube and star point) is made, there exists need for optimal replication for the purpose of minimizing biasedness. Some variatio...

Travelling Waves Solutions for the Transesterification Reaction Kinetics of Biodiesel Production Using Tanh Method.

ABSTRACT A mathematical model consisting of a set of two coupled non-linear reaction diffusion equations has been developed. The model is based on the chemical kinetics of transesterification for biodiesel production using irreversible and non-catalytic conditions. Employing the hyperbolic tangent approach, an exact analytical solution for the travelling-waves of a finite series form was found. The wave number and the speed of the wave were determined. Furthermore,physical interpretations wer...

Leachate, Groundwater, Surface Stream, Treated Water and Soil Characteristics of the Vicinity of a Municipal Solid Waste Dumpsite at Uyo Metropolis, Akwa – Ibom State, Nigeria.

Abstract These findings documented the physical, chemical and heavy metal contents in leachate, borehole water, surface stream, treated water and soil samples around the municipal solid waste dumpsite at Uyo metropolis, Akwa-Ibom State, Nigeria. Samples were collected during the wet and dry seasons 2010/2011. The samples were analysed for the following parameters: heavy metals (Fe, Cu, Mn, Zn, Cr, Cd, Pb), anions (PO3 4,SO2- 4,Cl- , NO3, NH+ 4-N), essential metals (Na, K, Ca, Mg), total disso...


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