Study of the acidic deposition phenomenon over Alexandria city.

Acid deposition commonly occurs due to conversion of primary acidic pollutants (SO2 & NO2) into secondary pollutants (H2SO4 & HNO3 and their salts). The main natural sources of acid deposition in Alexandria include lightening and microbial processes. Anthropogenic sources include traffic, industrial, fuel burning, and incineration activities.

Indoor air quality of schools in Alexandria City.

Poor air quality in schools can affect children's desire and ability to concentrate and learn and may lead to increased rate of absenteeism. This study was carried out with the aim of characterizing and measuring indoor air quality in school buildings, measuring ventilation status and studying the impact of design and environmental parameters on some measured pollutant levels. The study was carried out in some primary schools of Alexandria City.

Evaluation of occupational hazards in foundries.

The working environment of foundries is hazardous and characterized by multiple simultaneous chemical, physical and mechanical hazards exposure, which would lead to injuries of foundry workers. The aim of the present work is to evaluate occupational hazards in four foundries, two in Alexandria: El Nasr and Ramsis, and two in Behira: Misr Spinning and Weaving and Misr Rayon companies. Levels of total and respirable dust, free silica % in total dust and lead concentration in total and respirable dust; NO2, SO2 and CO concentrations; noise and heat stress levels have been determined in the present work.

A comparative study of some methods for measuring carbon monoxide in air.

The present study aimed at comparing between some physical and chemical methods for measuring carbon monoxide (CO) level in air and selecting the most suitable one concerning simplicity, reproducibility, sensitivity, specificity, and accuracy. Known concentrations of CO were prepared in cylinders and air samples with unknown concentrations of CO were collected in plastic bags from the street environment. Both known and unknown concentrations of CO were measured by four selected methods.

Indoor air pollution and acute lower respiratory infections in the first two years of life.

The relationship between outdoor air pollution and acute respiratory infections (ARI) was previously documented. There are recent indications for connection between indoor air pollution and ARI in infants and young children. The aim of this study was to identify the relationship of indoor air pollutants to acute lower respiratory infection (ALRI) in children (< 2 years).