Research Papers/Topics in Chemistry

Nutritional Value And Trace Metal Contamination of Soft Drinks Sold on The Ghanaian Market

ABSTRACT Soft drinks are consumed daily in Ghana on social occasions and for recreation. Generally, it is affordable and consumed widely across all age groups particularly due to their thirst quenching potential. These drinks are also important sources of nutrition as well as trace metal contamination. Thus, the study monitored for 4 months the nutritional content and trace metal contamination of forty-two different brands of new day soft drinks (totaling 672 samples), sampled from s...

Synthesis Of The Complexes Of 4-Cy Anobenzaldehydecyclohexylace Tic Acidhydrazone With M(Ii) Sulphates And Acetates. (M= Ni, Cu, Co, Zn)

ABSTRACTComplexes of 4 - Cyanobenzaldehydecylohexyl acetic acidhydrazone ( 4-CBAH) with M(II) sulphates and acetates have beensynthesized (M=Ni, Cu, Co and Zn). The complexes were characterized byelemental analyses, conductance, infrared and electronic spectral studies .. The sulphate ions are in the outer coordination sphere, so also the acetate10ns.The electronic spectral studies of the isolated complexes indicate anoctahedral coordination for Ni2+ and Co2+ complexes while Cu2+ complexesmay...

Studies Of Aluminium Complexes Of Some Model Biological Ligands

ABSTRACTComplexes of Aluminium with some model bioligands, were preparedand characterized by elemental analysis, melting point, conductivity, solubilityand infra-red spectroscopic studies.The complexes are soluble in water and some organic solvents such aschloroform, ethanol and methanol. The melting point ranges from 258°C -282°C for complexes with Al Cl3, and 8Ql C - 95 C, for complexes withAlNH4(S04) 2 .12H2 0. Conductivity studies reveals that the prepared· complexes are non-electrolyt...

Isolation and Characterization of starch from Parkia biglobosa (jacq.)Benth. (Fabaceae_Mimosoideae) (African locust bean)

ABSTRACT The isolation and characterization of starch from Parkia biglobosa Oacq.)Benth. (African locust bean), was investigated. The starch was extracted by a pre- isolation bleaching using KOH (5%) and sodium hypochlorite (3 .5% ); followed by steeping, wet milling and centrifugation. The starch obtained was dried in an oven at 60°C. The thermal properties were obtained by Differential Scanning Calorimetry (DSC). The work showed that Parkia starch has a pH of 5.6,density (true) 2.3l...

Impact of Effluents From the Transcorp Hilton Hotel on The Quality Characteristics of The Receiving Water From Maitama Stream Abuja.

ABSTRACT The impact of the effluents from the Transcorp Hilton Hotel on the quality of the Maitama Stream, Abuja was studied. Samples were collected from points upstream (control samples), the effiuent discharge point and points downstream (a total of eight points) and analyzed as follows: Electrochemical methods of determination were used in the determination of pH and dissolved oxygen content whilst classical methods of analysis were used in the determination of total alkalinity and...

Impact of Agricultural Chemical Inputs on Metal Levels in Soil And Arable Plants on Kwali Area Council

ABSTRACT      The concentrations of Pb, Cu, Zn, Ni and Cd in agricultural soils and vegetation of Kwali Area Council were determined by flame atomic absorption spectrophotometry. The HN03 -HCI04-HF mixture was used for the digestion of soil samples for metal determination, while HNOTHCI04 was used for metals determination in vegetation. The coefficient of variation for Pb, Cu, Zn, Ni and ....... Cd in soil were 4.0%, 4.8%, 3.2%, 3.9% and 4.3% while in vegetation were 7....

ELECTRONIC AND VIBRATIONAL ABSORPTION SPECTRAL STUDY OF SOME N - SUBSTITUTED ANILIDES AND SULPHONANLIDES

ABSTRACT  The electronic and vibrational absorption spectra of some N - substituted anilides and sulphonanilides have been studied. The different bands observed have been assigned to the proper electronic and vibrational transitions respectively. The solvent dependence of n - n* and n- n* transitions in these compounds was investigated by studying their UV spectra in pure organic solvents of different polarities. The longest wavelength band displayed by the anilides and the sulphon...

TRACE HEAVY 'METALS IN FISII AND SEDIMENTS OR SOME RIVERS AROUND INDUSTIRIAL AREAS OF TilE KADUNA RIVER BASIN

The level of Cd, Co, Cu, Mn, Ni, Pb and Zn in fish and sediments of Rivers within the Kaduna South Jndustrial Zone were determined by flame atomic absorption spectrophotometry. The HN03 - I-1202 digestion .. .. system was used to digest the fish sample far trace m etals determination. Tire HN03 - H202 digestion method gave good recoveries which vCiries within 80-95% for Cd, 85-97% for Co, 81-99% for Cu, 79-97% for Mn, 81-93% for Ni, 87- 98% for Pb Clnd 77 - 98% for ...

Synthesis Of Novel Atimalarial And Antitubercular Isonicotinohydrazides

ABSTRACT Malaria and tuberculosis (TB) though curable and preventable, remain serious public health problems globally, with devastating consequences. Co-infection of these two deadly diseases worsens the situation and particularly makes treatment very difficult. While the current mainstay for malaria treatment, artemisinins, may gradually lose their potency due to the development of resistance by P. falciparum, M. tuberculosis has developed Multi-Drug Resistance (MDR) and Extensiv...

STUDIES OF ALUMINIUM COMPLEXES OF SOME MODEL BIOLOGICAL LIGANDS

Complexes of Aluminium with some model bioligands, were prepared and characterized by elemental analysis, melting point, conductivity, solubility and infra-red spectroscopic studies. The complexes are soluble in water and some organic solvents such as chloroform, ethanol and methanol. The melting point ranges from 258°C - 282°C for complexes with Al Cl3, and 8Ql C - 95 C, for complexes with AlNH4(S04) 2 .12H2 0. Conductivity studies reveals that the prepared· ...

DEVELOPMENT OF RESIN-BOUND REACENTS FOR ANALYSIS OF CARBOXYLIC ACIDS AND AMINES

ABSTRACTResin-bound-reagents made up of ionically-bound 2- naphthalene-methanol and covalently bound and sodium-benzoxazole2-sulfonate have been synthesized and utilized as analytical reagents for the pre-chromatographic derivatization of fatty acids (i.e . acetic, lauric, capric, hexanoic, octanoic, nonanoic, palmitic docosanoic linoleic), 1° and 2° aliphatic amines and amino acids respectively. 

SYNTHESIS AND CHARACTERIZATION OF ECO- FRIENDLY UREA-FORMALDEHYDE COMPOSITES BASED ON NATURAL CELLULOSE FIBER

Cellulose is the most common structural biological organic compound on Earth which is widely used in paper and textile industries and urea-formaldehyde resin is a thermosetting plastic used mostly as adhesives for plywood, particleboard and other structured wood products. Natural fiber composites are realistic alternatives of glass fiber composites. Using urea-formaldehyde, resorcinol-formaldehyde, phenol-formaldehyde, saturated polyesters as matrixes and natural fiber as reinforcement, ...

Eco-friendly Urea-Formaldehyde Composites Based on Natural Cellulose Fiber

The variation of character of urea formaldehyde resin with addition of cellulose extracted from corn husk was tested. Cellulose was extracted from dried raw corn (Zea mays) husk, the second largest agricultural crop grown around the world, by alkaline treatment (mercerization), followed by neutralization with acid; product of which underwent bleaching to produce pure form of cellulose. Urea-formaldehyde (UF) resin was prepared by heating the formaldehyde in paraffin oil bath and adding...

A STUDY OF THE PHYTOCHEMICAL CONSTITUENTS, NUTRITIVE AND ANTI-NUTRITIVE VALUES OF CALABASH FRUIT

The calabash (Cresentia cujete) fruit was studied for its proximate and mineral composition as well as its phytochemical constituents.  The sugar content, energy content, protein, nitrogen, crude fibre, moisture content, sucrose, fructose, galactose and energy content are quite reasonably high (viz: 1.13%, 8.35%, 1.34%,  4.28%,  84.92%,  59.86%,  25.09%, 18.24% and 88.69%). The pH of the fruit falls within the acidic range (4.8) and the mean value recorded for the ele...