OBJECTIVES We aim to assess the independent association of particles, after controlling for gaseous pollutants, with the risk of death among a cohort of patients with chronic obstructive pulmonary disease (COPD). METHODS Residents of Barcelona, aged over 35 years, who attended emergency room services for COPD exacerbation from 1985 to 1989 and who died in the period 1990-1995 (n = 2305) were ...

the continuous addition of industrial, municipal, and agricultural effluents to the environment has led to a great increase of toxic pollutants. it is well known that these pollutants are hazardous to animals, plants, microorganisms, and other living organisms including humans. as a result, effective technologies should be developed to remove these contaminants. biological remediation, as an ec...

background: paraquat dichloride is a highly toxic herbicide which is still used in many developing countries. african cat fish (clarias gariepinus) is a commercially important species in many countries and was selected assess accumulation and elimination of paraquat dichloride in its tissues. methods: groups of ten fish with equal lengths and weights were exposed to varying concentrations of pa...

conclusions according to the results of this study, this increase could be due to higher fuel consumption, usage of gasoline in vehicles, oil industry, and steel and heavy industries in ahwaz. the risk of mortality and morbidity were detected at the current concentrations of air pollutants. results according to the findings, the concentration of sulfur dioxide in ahvaz had an annual average of ...