Environmental & Physical Sciences

Research Papers/Topics in Environmental & Physical Sciences

Spectrophotometric Determination of Vanadium(Iii) And Vanadium(V) Using 2-[(E)-[3-[(E)-(2-Hydroxyphenyl)Methyleneamino] Phenyl]Iminomethyl]Phenol

ABSTRACT 2-[(E)-[3-[(E)-(2-hydroxyphenyl)methyleneamino]phenyl]iminomethyl]phenol was synthesized from the condensation reaction of 1,3-diaminobenzene and 2-hydroxyzaldehyde in dimethylformaldehyde (DMF). Its coordination characteristic with vanadium(III) and vanadium(V) complexes was studied via, UV/Visible, IR and NMR spectroscopy; stoichiometric, melting point and conductivity determinations. The analytical data of these complexes and the mode of bonding show that, the ligand acted as a te...

Evaluation of the Quality Assurance of Five Brands Amoxicillin Trihydrate Capsules Sold in the Open Drug Market at Nsukka

ABSTRACT The active drug content and weight uniformity of five brands (A – E) of Amoxicillin Trihydrate capsules in Nsukka open drug market were evaluated to ascertain their quality assurance using UV visible spectroscopy and gravimetry. This study has shown that all the brands analyzed showed significant variations with respect to active drug content determination for the three brands B, D and E. Using United State Pharmacopoeia (USP) and British Pharmacopoeia (BP) specifications of 90 –...

The Effects of the Binary and Ternary Combinations of Pine Needle (Pinus Pinaster ) Dust and Bambara Nut (Vigna Subterranea ) Chaff with Sub-Bituminous Coal Dust for Briquette Production

ABSTRACT This work studied the effect of the binary and ternary combinations of pine needle (Pinus pinaster ) dust and bambara nut (Vigna subterranea) chaff with coal dust for briquette production. Briquettes of 100% of the pure coal and the biomass were produced first. The ratios for the blending were as follows 1:1 for the binary combination of each biomass with coal and with themselves, and 1:1:1 for the ternary combination of the two biomass with coal. The feed stocks were dried to a mois...

Modification of Coconut Shell Activated Carbon with an Azo Ligand: 1, 2– Dihydro-1, 5- Dimethyl-2 Phenyl-4- (E)– (2,3,4- Trihydrophenyl)-3h-Pyrazol-3-One (Ddptp) And Its Potentials for the Re

ABSTRACT Modification of coconut (Cocos nucicera L.) shell activated carbon with an Azo ligand: 1, 2– dihydro-1,5-dimethyl-2-phenyl-4-(E)–(2,3,4-trihydrophenyl)-3H-pyrazol-3-one (DDPTP) and its potentials for the removal of Cd2+, Pb2+ and Ni2+ from polluted water samples were studied. It was activated chemically using CaCO3 as the activating agent. Proximate analysis on the coconut shell showed 8.7 % moisture content, 10.4 % volatile matter, 3.2 % ash content and 77.7 % fixed carbon. The ...

Divisional Library, Agbani Enugu State (Study of Functional Space Requirement of a Modern Library)

ABSTRACT “A Library is a repository of various forms of recorded information, as well as a collection of data in many formats.” (Metu A. 1987). The design proposal is a consequence of an investigation into the emerging concern about energy efficiency of buildings, the recent advances in information technology and their attending consequences on the planning and architecture of the future library. Demographic data and an understanding of the development need of the growing population valid...

Iterative Approximation of Equilibrium Points of Evolution Equations

Abstract Suppose that E is a real Banach space .which is both uniformly convex and q-uniformly smooth and that T is a Lipschit;: pseudocontractive self-mapping of a closed convex and bounded subset K of E. Suppose F(T) dcnotes the set of fixed points of T and U denot :s the sunny nonexpansive retraction of K onto F(T) and w any point of K, it is proved that the sequence {xn),"Lo generated from an arbitrary xo E K bv (where I denotes the identity operator on E and {a,),"==, and {Pn),"=o are re...

Tandem Amination Catalysis in the Synthesis of Diazaphenoxazine Compounds of Pharmaceutical Interest

ABSTRACT The synthesis and characterization of five new linear diazaphenoxazine compounds is reported. The key intermediate, 3-chloro-1-9-diazaphenoxazine, was prepared via a base catalyzed reaction of 2-amino-3-hydroxypyridine with 2,3,5-trichloropyridine in aqueous 1, 4-dioxane. Five 3-amino derivatives of the key intermediate were prepared via Buchwald – Hartwigamination coupling reaction between 3-chloro-1,9-diazaphenoxazine and various heterocyclic amines, under the catalytic influence...

The Growth and Characterization of Thin CDs by Solution Deposition Technique

CONTENTS .- - CERTIFICATION: DEDICATION : ABSTRACT ACKNOWLEDGEMENT CHAPTER ONE: INTRODUCTION : ' 1.1 Motivation behind growth of thin Films 1.2 What are thin films .I "3 Uses of thin films 1.4 Deposition techniques : 1.5 Reasons for the technique used in experimentation 10 - CHAPTER TWO : BASIC SEMICONDUCTOR PHYSICS 12 - 39 2.1 What are SemicondLlcrors 12 2.2 Examples of Semiconductors 14 2 '3 Types of Semiconductors 16 2.4 Semiconductor Statistics 20 2 -41 Probability of occupation of allowe...

Tandem Amidation Catalysis in the Synthesis of Diazaphenoxazine Carboxamides of Pharmaceutical Interest

ABSTRACT Tandem amidation catalyzed synthesis of linear diazaphenoxazine carboxamide derivatives is reported. This was achieved by the reaction of 2-amino-3-hydroxypyridine and 2,3,5-trichloropyridine in aqueous basic medium which gave 3-chloro-1,9-diazaphenoxazine as white solid crystals. 3-Chloro-1,9-diazaphenoxazine was then subjected to Buchwald-Hartwig amidation coupling reaction with various amides namely formamide, phthalamide, 4- nitrobenzamide, benzamide and acetamide via water promo...

O-Acylation of Angular Diazaphenoxazine and Related Carbocyclic Analogue Using Buchwald Catalyst

ABSTRACT Synthesis of twelve O-arylated diazabenzo[a]phenoxazine-5-one and its carbocyclic analogue is reported in 46 - 99 % yields. The intermediates were prepared by anhydrous base catalyzed reaction of 2,3-dichloro-1,4- naphthoquinone with 4,5-diamino-6-hydroxyl-2-mercaptopyrimidine and 2- aminophenol. The O-arylation process occurred smoothly in non-polar solvent, toluene with the inexpensive base, K2PO4 at 110o C. The intermediates were combined with a variety of electron-deficient, elec...

Hydrogeophysical Investigation in Nsukka Area Southeastern, Nigeria

ABSTRACT Resistivity surveys were carried out at seven stations within the university of Nigeria, Nsukka and its environs. The objective was to determine areas suitable for the drilling of boreholes for groudhvater. The results generated from this survey were interpreted in terms of the number of subsurface layers, usurer thickness, depth to uquifer and, probable lithology$orrnations. However, lithologic interpretations were carried out using exist ring borehole data from the area. A BEM Terr...

Assessment of Solid Waste Disposal Pattern of Sellers in Mile One Market, Port Harcourt City Rivers State

ABSTRACT The study sought to assess the solid waste disposal pattern of sellers in Mile One Market Port Harcourt in order to: identify the solid waste disposal habits of sellers, determine the frequency of clearing dumpsters from the market, determine accessibilityof waste dumpsters to market sellers and ascertain if the pattern of waste disposal significantly vary from different section of the markets.Data wereobtained throughinterviews, questionnaires and on the spot observation. A total of...

Effect of Urban Waste on the Water Quality of Mmiriocha River Inabakpa, Enugu State

ABSTRACT The indiscriminate dumping of urban wastes in surface water bodies in urban and semiurban areas in Nigeria has become a growing menace to humans and natural ecosystem. This study tried to access the effect of urban waste on Mmiriocha river quality located in Abakpa, Enugu state. Water samples were collected at four different points considering various human activities that generate and discharge wastes into the river such as abattoir, raw sewage from homes, open dumps along the river...

Physicochemical and Microbial Analysis of Surface Water Quality at Mbagule-Ipav, Gboko LGA Benue State, Nigeria for Drinking Purpose

Surface water quality was accessed at Mbagule-Ipav, Gboko LGA Benue state, Nigeria, a community dominant with agricultural activities. Investigation showed that the community has one stream which serves as the only source of water to the community for domestic and agricultural purposes. This research was to ensure the use of clean and safe drinking water for the public health protection. On this regard, a physicochemical and Microbial analysis of the surface water was carried out for s...

Spatio-Temporal Analysis of Crime in Enugu Metropolise from January 2010 to June 2015 Using Geographic Information System

ABSTRACT The study focused on improving crime analysis and mapping in Enugu urban using Geographical information system (GIS ) and spatial database of crime which helps in the determination of hotspots in Enugu Urban and also it identifies the challenges facing police departments that seek to implement computerized crime mapping systems. The analysis of the existing information system from the Enugu urban Police Force showed that the current system was manual and not sufficient for crime anal...


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