Publications by authors named "Robert Grayson"
Article Synopsis
- - The study investigates how hyperthermal reactive ions, specifically water group molecules, affect the organic chemistry of icy bodies, which could be important for understanding prebiotic conditions.
- - Molecular dynamics simulations reveal that irradiating carbon-bearing ice with atomic oxygen primarily produces methanol, suggesting a unique hot-atom reaction mechanism, especially at lower doses.
- - At higher irradiation doses, the chemical composition shifts towards more oxidized carbon compounds, with formaldehyde becoming more prevalent than methanol, indicating varying effects of different impactors and guest species on the ice chemistry.
We describe measurements of adsorption between two flat plates when the plates are separated by 0-65 nm. The objective is to examine how adsorption is affected by confinement in very thin films. It is well known that adsorption of simple ions can change with the thickness of a thin film (charge regulation); here, we describe a direct method to measure adsorption as a function of confinement and results for one example.
View Article and Find Full Text PDFPotential risk effect from elevated levels of soil heavy metals on human health in the Niger delta.
Ecotoxicol Environ Saf
November 2012
An analysis of the soil quality in the Niger Delta Area (NDA) was carried out to determine the severity of soil contamination. The United States Environmental Protection Agency (US EPA) risk assessment model was used in determining the potential health risk due to lifetime exposure (by means of ingestion, dermal contact and inhalation) of the population to heavy metal contents in the soil. Substantial levels of contamination were found indicating elevated levels of heavy metals above background concentrations from controlled samples in the areas.
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