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 sulphonanilide i...
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 Zn in a fish smnple. T...
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 Extensive Drug Resis...
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· complexes are non-electr...
ABSTRACT Resin-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.
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 reinforcem...
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 urea t...
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 electrical conductivity...