Context. High-mass stars, though few in number, play a major role in the interstellar energy budget and the shaping of the Galactic environment. However, despite this importance, the formation of high-mass stars is not well understood, due to their large distances, short time scales, and heavy extinction. Aims. Chemical composition of the massive cores forming high-mass stars can put some const...

The proliferation of industrial activities globally has led to the increase in concentration hazardous pollutants atmosphere. We thus hypothesized that Port Harcourt, an industrialized city, and host a foremost refinery Africa, would have high indoor outdoor environments. took air samples with gas monitor (Aero qual series 500) from environments 40 residential areas. sampling sites were georefe...

Changes in the emission rate of volcanic sulphur dioxide (SO2) are crucial parameters for identifying unrest and forecasting eruptive activity. Ground-based ultraviolet (UV) remote sensing provides a near continuous record SO2 rate, with Differential Optical Absorption Spectroscopy (DOAS) being preferred method quantifying absorption from recorded spectra. However, retrieving accurate column am...

This paper presents the experimental results obtained during the irradiation process with electron beam of flue gases generated by burning fuel with a high content in sulphur. The ALIN-10 accelerator was used for generating the electron beam. The necessary water was sprayed into the gaseous mixture as fine droplets by the mist pump. The highest removal efficiencies were obtained in the presence...

An appropriate method for evaluating the air quality of a certain area is to contrast the actual air pollution levels to the critical ones, prescribed in the legislative standards. The application of numerical simulation models for assessing the real air quality status is allowed by the legislation of the European Community (EC). This approach is preferable, especially when the area of interest...

A novel approach to life-cycle sustainability (impact) assessment and interpretation procedure on the basis of multiple criteria is developed in this paper for the comparison and evaluation of alternative road pavement designs. A case study reported in the literature, which compared pavement structures with virgin materials as well as industrial by-products such as coal ash, crushed concrete wa...

OBJECTIVES To investigate the potential correlation between ambient air pollution exposure and emergency department (ED) visits for depression. MATERIALS AND METHODS A hierarchical clusters design was used to study 27 047 ED visits for depression in six cities in Canada. The data used in the analysis contain the dates of visits, daily numbers of diagnosed visits, and daily mean concentrations...

Urban agglomerations are places of increased emissions of anthropogenic pollutants into the atmosphere. Since most of these pollutants are harmful to humans, reduction of their ambient concentrations is a major issue of environmental policy on international, national, and local levels. According to Wiederkehr and Yoon (1998), air pollutants can be grouped into major and trace or hazardous air p...

STUDY OBJECTIVE To assess, within the multinational European Community funded APHEA project, the relationship between daily ambient air pollution with sulphur dioxide (SO2) and black smoke (BS) and the daily number of deaths from all causes except external, from cardiovascular diseases, and from respiratory diseases taking into account several possible confounding factors. DESIGN Time series ...

BACKGROUND There is evidence that long term exposure to ambient air pollution increases the risk of childhood asthma, but the role of different sources and components needs further elaboration. To assess the effect of air pollutants on the risk of asthma among school children, a nationwide cross sectional study of 32 672 Taiwanese school children was conducted in 2001. METHODS Routine air pol...