Evaluation of some pollutants in the atmosphere of Helwan - Cairo Год выпуска: 2012Автор: Yuosra Saeed,Abdel Hameed Awad and Mohammed OsmanИздательство: LAP Lambert Academic PublishingСтраниц: 168ISBN: 9783659001505Описание The composition of airborne bacteria and fungi at Helwan district were studied using slit sampler. The diurnal variations of airborne bacteria and fungi could be divided into four periods: 1)the morning maximum concentration (6am-10am), 2)midday to afternoon pattern (10am-4pm), 3)the evening concentration peak (6pm-8pm) and 4)the night time gradually decreased concentration (10pm-12am). Aspergillus, Penicillium, Alternaria and Cladosporium were the most predominant fungal genera in the air. Aspergillus showed double peak pattern, whileas, Penicillium, Alternaria and Cladosporium showed one peak pattern. The maximum peaks of total airborne fungi, bacteria, Penicillium and Cladosporium appeared at 8 pm. Positive correlations were found between airborne fungal concentration with relative humidity and sulfur dioxide. Negative correlations were observed between airborne fungi, Cladosporium and Penicillium with temperature. Nitrogen dioxide had negative effect on airborne bacteria,...
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