QUALITY ASSESSMENT OF BOREHOLE WATERS IN ENUGU URBAN ABSTRACTS The quality assessment of borehole and well waters from ten locations in Enugu urban area were studied and compared with World Health Organisation standards. The parameters measured include temperature, color, pH, electrical conductivity, total hardness, calcium hardness, magnesium hardness, total solids, total dissolved solids, total suspended …
PRODUCTION OF COPPER-CLAD PRINTED CIRCUIT BARE BOARD SUBSTRATE FROM AGRICULTURAL AND PLASTIC WASTE MATERIALS. ABSTRACT The use of printed circuit board is unavoidable within the electrical and electronic industries. Various types and models exist, all made from synthetic substrates. The environmental impact of discards of printed circuit boards as well as the need to go …
INVESTIGATION OF EFFECTS OF TWO FLAME RETARDANTS ON THE FIRE CHARACTERISTICS OF FLEXIBLE POLYETHER FOAM ABSTRACT This work studied the effects of two flame retardants on the fire characteristics of flexible polyether foam samples. Various concentrations of two flame retardants melamine and tri ammonium orthophosphate have been successfully incorporated into flexible polyurethane foam. Results of …
INVESTIGATION OF EFFECTS OF ALUM AND POTASSIUM SESQUICARBONATE ON THE FIRE CHARACTERISTICS OF FLEXIBLE POLYURETHANE FOAM ABSTRACT The effectiveness of alum and potassium sesquicarbonate was studied by incorporating various concentrations of the flame retardants into the polyurethane foam sample. The flammability tests were carried out and the results showed that as the concentration of the …
FLAMMABILITY STUDIES OF SOME FIRE TOLERANT TREES OF SOUTH-EAST, NIGERIA ABSTRACT Bush fire is a common hazard in South Eastern Nigeria as in other parts of the country during the harmattan. Every year, thousands of hectares of forests as well as suburban lands are severely burnt. These forest fires have been catastrophic, destroying large areas …
ENHANCING THE PROPERTIES OF COAL BRIQUETTE USING SPEAR GRASS (IMPERATA CYLINDRICA) AND ELEPHANT GRASS (PENNISETUM PURPUREUM) ABSTRACT The urgent need to protect our forest, to mitigate health hazards faced by the people from the use of firewood for cooking and to find an effective means of managing agro wastes has prompted a research on improving …
COMPARATIVE ANALYSIS OF COAL BRIQUETTE BLENDS WITH GROUNDNUT SHELL AND MAIZE COB. ABSTRACT This work studied the effect of groundnut shell and maize cob on coal briquette. The ratio of coal: biomass prepared were 90:10, 85:15, 80:20, 75:25, 70:30, 100:0. The mixture was treated with Ca(OH) which serves as a desulphurizing agent, before briquetting. The …
ASSESSMENT OF SOME HEAVY METALS IN SOIL SAMPLES ALONG GUTTERS IN NKPOR, ANAMBRA STATE ABSTRACT Ten representative soil samples were collected along major gutters within Nkpor metropolis. The soil samples were digested using mixtures of HF and aqua regia in ratio1:1. The heavy metals contents of the digested soil samples were determined via Flame Atomic …
ANALYSES OF SOME SELECTED HEAVY METALS AND CONTAMINANTS IN UNDERGROUND WATER AND THREE SATELLITE RIVER STATIONS IN OWERRI LOCAL GOVERNMENT AREA OF IMO STATE. ABSTRACT Water samples from ground water and some rivers from Owerri Local Government Area of Imo state Nigeria, were investigated for contaminants and heavy metals. The results obtained showed that in …
SYNTHESIS AND CHARACTERIZATION OF ZEOLITE AND ITS APPLICATION IN ADSORPTION OF NICKEL FROM AQUEOUS SOLUTION ABSTRACT The synthesis and characterization of zeolite and its application in adsorption of nickel from aqueous solution was investigated. Synthesis of zeolite was performed at 90 oC for 8 h. The size of the resulting crystals increased with an increase …
SYNTHESIS AND CHARACTERIZATION OF ZINC OXIDE NANOWIRE ABSTRACT Zinc Oxide (ZnO) nanowires with phexagonal structure were successfully synthesized by chemical bath deposition technique. The obtained nanowires were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and spectrophotometer. The SEM micrographs revealed the morphology of ZnO nanowires with diameter between …
SYNTHESIS AND EVALUATION FOR BIOLOGICAL ACTIVITIES OF N-PYRIDIN-3-YL SUBSTITUTED {PHENYLSULPHONAMIDO} ACETAMID ABSTRACT In this study, a series of N-pyridin-3-yl substituted [phenylsulphonamido] acetamide has been synthesized. The reaction of phenylsulphonyl chloride with various amino acids in basic medium yielded phenylsulphonamido alkanoic acid which, on chlorination with thionyl chloride, gave acid chloride derivatives of phenylsulphonamido alkanoic acid …
SYNTHESIS, CHARACTERIZATION AND SOLVENT EXTRACTION STUDIES OF 3,5-BIS{(2-HYDROXY-BENZYLIDENE)-AMINO}-BENZOIC ACID AND ITS CO(II) AND NI(II) COMPLEXES ABSTRACT 3,5-Bis[(2-hydroxy-benzylidene)-amino]-benzoic acid (H2B) and its cobalt(II) and nickel(II) complexes were synthesized and characterized via: electronic, IR, 1H NMR and 13C NMR. Job’s continuous variation method was used to determine the mole ratio for both metal complexes. Solvent extraction studies …
TOTAL ALKALOIDS, TOTAL TANNINS CONTENT AND ANTIULCER ASSAY OF FOUR SELECTED MEDICINAL PLANTS ABSTRACT The total alkaloid, tannins contents and antiulcer activity of the extracts from four selected medicinal plants were investigated. The total alkaloids content (TAC) was evaluated according to the chloride colometric method in which atropine was used as standard. While the total …
PHYSICOCHEMICAL AND BACTERIOLOGICAL ANALYSES OF BOREHOLE WATERS IN ANINRI, AWGU AND OJI RIVER LOCAL GOVERNMENT AREAS OF ENUGU STATE, NIGERIA ABSTRACT Physicochemical and bacteriological analyses of borehole water samples were randomly collected from ten boreholes which supply drinking water to various communities of Aninri, Awgu and Oji River Local Government Areas of Enugu, Nigeria. The …
PHYSICOCHEMICAL STUDIES OF BOREHOLE WATER IN ENUGU NORTH SENATORIAL DISTRICT, ENUGU STATE, NIGERIA ABSTRACT The groundwater quality indices of 12 randomly selected boreholes in Enugu North Senatorial District in Enugu State, south-east Nigeria have been studied. Using standard methods by American Public Health Association, American Water Works Association; World Environmental Federation (APHA-AWWA-WEF) and the Association …
PHYTOCHEMICAL QUANTIFICATION, ANTIOXIDANT AND ANTIMICROBIAL ACTIVITIES OF ROOT EXTRACTS OF DENNETTIA TRIPETALA AND MILICIA EXCELSA ABSTRACT The roots of Dennettia tripetala and Milicia excelsa were analyzed for the presence of phytochemicals. Five different solvents, which include methanol, ethanol, ethyl acetate, butanol and water, were used for the extraction of the phytochemicals.The root of Dennettia tripetala …
SOLVENT EXTRACTION STUDIES ON ZN(II) AND CD(II) COMPLEXES OF 1,5-DIMETHYL-2-PHENYL-4((E)-(2,3,4-TRIHYDROXYPHENYL))DIAZENYL-1,2-DIHYDROXYL-3H-PYRAZOL-3-ONE. ABSTRACT The azo-ligand, 1,5-dimethyl-2-phenyl-4-[(E)-(2,3,4-trihydroxylphenyl) diazenyl]- 1,2-dihydro-3H-pyrazol-3-one (H3L) and its Zn(II) and Cd(II) complexes have been synthesized and characterized based on stoichiometric, molar conductance, electronic and infra-red spectral studies. The results showed that H3L reacted with the metals in 2:1 ratio. H3L coordination was through the …
SPECTROPHOTOMETRIC DETERMINATION OF PARACETAMOL USING ZIRCONIUM (IV) OXIDE AND AMMONIUM TRIOXOVANADATE (V) ABSTRACT A simple and sensitive spectrophotometric method for the determination of paracetamol was explored, using zirconium(IV) and vanadium(V) oxides. The method was based on the oxidation of paracetamol by zirconium(IV) and vanadium(V) in alkaline and acidic media respectively. The stoichiometric studies indicated a …
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 …
SYNTHESES OF FUNCTIONALISED ANGULAR PHENOTHIAZINES AND PHENOXAZINES OF PHARMACEUTICAL INTEREST VIA TRANSITION METAL-CATALYZED TANDEM REACTIONS ABSTRACT The synthesis of new angular aza phenothiazinones, angular azaphenoxazines and their derivatives are reported. Two key functional intermediates namely 2,6-diamino-4-chloro-pyrimidin-5-thiol and 7-chloro-5,8-quinolinequinone were successfully synthesized from readily available starting materials using such traditional organic methods as nitrosation, nitration, halogenation, …
SYNTHESES, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITIES OF ALKYNYLATED ANGULAR PHENOXAZINES AND ALKYNYLATED NAPHTHOQUINONES ABSTRACT The synthesis of ten new alkynylated derivatives of angular phenoxazine and alkynylated naphthoquinone was thoroughly investigated. The first intermediate, 6-chloro-5H-benzo[a]phenoxazin-5-one was obtained by the condensation of 2-aminophenol with 2,3-dichloro-1,4- naphthoquinone in the presence of anhydrous sodium tricarbonate (IV) . Thereafter, the intermediate …
SYNTHESIS AND BIOLOGICAL ACTIVITIES OF PHENYLSULPHONYL AMINO ALKANAMIDES ABSTRACT Palladium catalysed synthesis of substituted 2-[acetyl(phenylsulphonyl)amino]-3-methylbutanamide (176) is reported. The intermediate 2-[acetyl(phenylsulphonyl)amino]-3-methybutanamide (175) was obtained by the reaction between 2-[acetyl (phenylsulphonyl)amino]-3-methybutanoic acid chloride (175) and ammonia. Substituted 2-[acetyl (phenylsulphonyl)amino]-3-methylbutanamides (176a-f) were obtained by coupling 2-[acetyl (phenylsulphonyl)amino]-3-methylbutanamide (175) with various readily available substituted aryl halides via a …
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) morpholine- 4-carboxi-amine, and N-(2-chloroethyl)-1-methylpiperazine-4-carboxi-amine derived from isocyanate were synthesised by the reactions of …
ASSESSMENT OF HEAVY METALS AND POLYCYCLIC AROMATIC HYDROCARBONS IN WATER, FISH AND SEDIMENTS OF RIVERS NIGER AND BENUE CONFLUENCE, IN LOKOJA, KOGI STATE. ABSTRACT The concentration of six heavy metals and six of sixteen (16) US EPA priority polycyclic aromatic hydrocarbons (PAHs) in water, fish and sediment samples of the confluence of rivers Niger and …
CATALYST DEVELOPMENT FROM LOCALLY AVAILABLE RESOURCES – (A CASE STUDY OF NICKEL-SILICA CATALYST) ABSTRACT The efficacy of silica obtained from our local sand as a carrier in synthesis of Nickel-Silica catalyst was investigated. Six samples of soil were collected from two different sites (comprising five white coloured samples collected from Iva valley, lower part of …
COMPARATIVE ANALYSIS OF ACID ACTIVATED NTEJE CLAY AND TWO COMMERCIALLY AVAILABLE ADSORBENTS (FULLER’S EARTH AND ACTIVATED CARBON) ABSTRACT The composition and bleaching properties of Nteje clay in comparison with two commercially available adsorbents (activated carbon and fuller’s earth) were investigated to study its competence for use as an alternative to high cost imported adsorbents. The …
DETERMINATION OF HEAVY METALS IN PLASTIC HOUSING OF SELECTED OBSOLETE MOBILE PHONES AND TELEVISION PRODUCED IN SOME YEARS BETWEEN 1980 AND 2000 ABSTRACT The concentrations of lead, nickel, silver, zinc, chromium, copper, vanadium, cobalt, and cadmium were determined in plastic housing of waste television sets produced in some years of 1980’s, 1990’s and 2000’s, and …
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. …
FABRICATION AND CHARACTERIZATION OF ZEOLITES AND ITS APPLICATION IN HEAVY METAL CAPTURE ABSTRACT Zeolite crystals were synthesized by mixing sodium silicate and sodium aluminate to obtain aluminosilicate gel which was further treated hydrothermally to obtain the final product. The zeolite crystals were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD result …
KINETICS AND MECHANISMS OF THE ELECTRON TRANSFER REACTIONS OF THE µ-OXO- BRIDGED IRON(III) COMPLEX, NA4((FEEDTA)2O).12H2O WITH SOME THIOLS ABSTRACT The kinetics and mechanisms of the redox reactions of µ-oxo-bridged iron(III) complex ion Na4[(FeEDTA)2 O].12H2O denoted as Fe2 O4+, with the thiols-2-mercaptobenzothiazole(MBSH), 2- mercaptophenol(PhSH), 2-mercaptoacetic acid (MSH), and l-cysteine (RSH) have been investigated in aqueous perchloric …
LEACHATE, GROUNDWATER, SURFACE STREAM, TREATED WATER AND SOIL CHARACTERISTICS OF THE VICINITY OF A MUNICIPAL SOLID WASTE DUMPSITE AT UYO METROPOLIS 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. …
LEVELS OF HEAVY METALS IN PASTA AVAILABLE IN THE NIGERIAN MARKET- ASSESSING THE HEALTH IMPLICATIONS ABSTRACT The concentrations of Ni, Mn, Cd, Cu, Zn, Pb and Cr, were determined in some pastas consumed in Nigeria, with a view to providing information on the dietary intakes of heavy metals and exposure of humans to toxic metals. …
LEVELS OF POLYCYCLIC AROMATIC HYDROCARBONS IN SOME BRANDS OF PASTAS IN NIGERIAN MARKET- AN ASSESSMENT OF POSSIBLE POTENTIAL HEALTH RISK ABSTRACT Concentrations of 16 priority polycyclic Aromatic Hydrocarbons (PAHs) were determined in 30 brands of Nigerian and imported pastas in Nigerian market. The pasta samples were categorised into (1) noodles (2) spaghetti and (3) macaroni. …
ALKYLATION OF (PT2(µ-S)2(PPH3)4) WITH BORONIC ACID DERIVATIVES BY PRESSURIZED SAMPLE INFUSION ELECTROSPRAY IONIZATION MASS SPECTROMETRY (PSI-ESI-MS) TECHNIQUE ABSTRACT This project work present the alkylating reaction of [Pt2(μ-S)2(PPh3)4] with boronic acid alkylating agents.The reactivity of the metalloligand [Pt2(μ-S)2(PPh3)4] with the boron-functionalized alkylating agents BrCH2(C6H4)B(OR)2 (R = H or C(CH3)2) was investigated by electrospray ionization mass spectrometry …