The focus of this research work is on the determination of the impact of mining on the groundwater quality in the historical mining region of SW Ashanti region in Ghana. This work describes the characteristics of the groundwater chemistry and pollution of the aquifer in the gold-ore bearing formation, which is highly weathered and fractured. The fractures control the permeability and depth of t...

Corrosion of steel reinforcement is the major cause of deterioration in concrete structures, and carbon dioxide and especially chlorides are the main causes of damage. The rate at which chloride ions diffuse through concrete is a major determinant of the durability of structures. If chloride ions reach the vicinity of the rebar, the passive film around the steel can start to break down and the ...

L-glutamate, the major excitatory neurotransmitter in the human brain, activates a family of ligand-gated ion channels, the major subtypes of which are named AMPA, kainate, and NMDA receptors. In common with many signal transduction proteins, glutamate receptors are modulated by ions and small molecules, including Ca(2+), Mg(2+), Zn(2+), protons, polyamines, and steroids. Strikingly, the activa...

the focus of this research work is on the determination of the impact of mining on the groundwater quality in the historical mining region of sw ashanti region in ghana. this work describes the characteristics of the groundwater chemistry and pollution of the aquifer in the gold-ore bearing formation, which is highly weathered and fractured. the fractures control the permeability and depth of t...

A bioassay method for the polyene antibiotics nystatin and amphotericin B is proposed based on the measurement of the efflux of rubidium ions from a rubidium-loaded yeast culture challenged with the antibiotics. For this purpose a major proportion of the intracellular K(+) ions in a Saccharomyces cerevisiae culture has been substituted by Rb(+) ions. The rubidium leakage is measured by atomic a...

Investigation of nonspecific interactions of metal ions with proteins and studies of biological function of such complexes are of importance (Breslow 1978; Friedberg 1975). Identification of the binding centers of metal ions with proteins and determination of the binding constants are necessary to explain the transfer mechanisms of these ions by proteins. Earlier it has been shown (Lau et al. 1...