lichen species (hypogymnia physodes and evernia prunastri) were used for biomonitoring thepossible air pollution with heavy metals in the vicinity of copper mine in the eastern part of the republic ofmacedonia. the contents of 18 elements were analysed by icp-aes and etaas techniques. for dataprocessing basic statistical methods and multivariate exploratory (factor and cluster analysis) techniq...

this study utilizes a decade long (2005-2014) monthly data of total column tropospheric ozone (tcto) in dubson units to evaluate the spatial and temporal trend of lao over some major cities of west africa, namely lagos, accra, niamey, abuja, bamako, dakar, agadez, conakry, kano, and ouagadougou which are either capital cites or major commercial hubs, where the population ranges from 0.09 millio...

atmospheric pressure plasma (app) is an emerging non thermal technology for the improvement of food  safety. non-thermal plasma (ntp) is a neutral ionized gas that comprises highly reactive spices including, positive ions, negative ions, free radicals, electrons, excited or non excited molecules and photons at or near room temperature. ntp can be generated at atmospheric pressure that makes it ...

The reaction of CH₃NH₂ with O₂ on the singlet potential energy surfaces (PES) was carried out using the B3LYP, CCSD(T) and G3B3 theoretical approaches along with 6-311++G(3df,3pd) basis set. The suggested mechanism for the title reaction consists of one pre-reactive complex. From the pre-reactive complex, nine types of products, CH2NH+H2O2, CH3NH+OOH,...

Conventional and nanostructured YSZ coatings were deposited on the IN-738 Ni super alloy by the atmospheric plasma spray technique. The oxidation was measured at 1100°C in an atmospheric electrical furnace. According to the experimental results the nanostructured coatings showed a better oxidation resistance than the conventional ones. The improved oxidation resistance of the nanocoating could ...

Sensitivity of tropical deep convection in global models: effects of horizontal resolution, surface constraints, and 3D atmospheric nudging Charles Chemel,* Maria R. Russo,2,3 J. Scott Hosking,2† Paul J. Telford2,3 and John A. Pyle2,3 1National Centre for Atmospheric Science (NCAS Weather), Centre for Atmospheric & Instrumentation Research, University of Hertfordshire, Hatfield AL10 9AB, UK 2Ce...

mercury is a dangerous and an extremely toxic element, which can transfer to the food chain.presence of this element in the atmosphere particularly during the rainy seasons cause soil and environmental pollution, therefore this research will evaluate the transformation of mercury vapor from the atmosphere through precipitation into the soil. in the present study, mercury concentrations were det...

Model/observation correlation as a stand-alone metric can be informative as it shows whether the model can reproduce patterns seen in the observations. For example, the ID component, as noted, has small errors, but for individual monitoring sites (not spatially averaged), correlation between modeled and observed ID is often quite low and insignificant (there often appears to be no relationship ...

Expressions for representing the pressure dependence of unimolecular dissociation and the reverse recombination reactions are compared. Situations are considered where the broadening of the corresponding falloff curves is particularly pronounced, i.e. where broadening factors at the center of the falloff curves, Fcent, are very small and falloff curves correspondingly becomevery “broad”. Such s...

In this paper the present "state\ of air quality modeling (as viewed by the authors) is presented. The focus of the paper will be on the "current\ state-of-aaairs. Due to limitation of space (and the focus of this Dagstuhl Seminar) the discussion will focus on only a few aspects of air quality modeling: i.e., chemical integration, sensitivity analisys and computational framework.