Gene/Protein Disease Symptom Drug Enzyme Compound
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 3,232 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Consequently to a bibliographic review, the Authors confirm that aliphatic aldehydes are ubiquitous constituents of rural and urban atmospheres and that they are certainly important by-products in many kind of antropogenic combustions (primary sources) as well as important intermediates in a wide variety of tropospheric chemical processes (secondary sources). The results of the monitoring of atmospheric aliphatic aldehydes in Turin city (north western Italy), during one year, are reported. The dynamic presence and concentration of aldehydes (mainly formaldehyde and acetaldehyde) is always limited below 100 ppb, however variable in the time. The results of our work point out the main role of photochemical processes during the summer, since the summer data well correlate with solar irradiation, ground temperature and relative humidity. During the winterthough it has not been possible to compare our data with other atmospheric pollutant (CO; NMHC), it is presumable a major role of primary sources in generating the atmospheric aldehydes. Without forgetting the irritant, mutagenic and cancerogenic properties of some aldehydes, we can assume that the next qualitative gasoline modification in 1991, according to the E.E.C. directive (8/5210/E.E.C. 20/3/1985), could cause an atmospheric aldehyde increase followed by a human risk increase.
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PMID:[Collective exposure to secondary pollutants. Origin, chemistry, environmental cycles, impact on urban and rural atmospheric contamination, criteria for prevention]. 248 3