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SAE technical paper series, Volume 830647.
Both sulfur and nitrogen pollutants may contribute to acidification of the environment. Meausrements indicate that nitric acid is an important contributor to... 
Nitrogen oxides
eJournal
SAE technical paper series, Volume 2005-01-0656.
.... The results showed that the addition of the twisted-tape insert reduced the soot deposition and the blockage of the entrance region observed in the cooling devices tested without inserts... 
Exhaust gas recirculation (EGR) | Diesel / Compression Ignition engines | Nitrogen oxides | Mathematical models | Diesel exhaust emissions control | Engine cooling systems | Spark ignition engines | Emissions
eJournal
Journal Article
Biogeochemistry, ISSN 0168-2563, 1/2013, Volume 113, Issue 1, pp. 467 - 479
Journal Article
Philosophical transactions. Biological sciences, ISSN 1471-2970, 07/2013, Volume 368, Issue 1621, pp. 20130166 - 20130166
Journal Article
Ecological applications, ISSN 1051-0761, 01/2010, Volume 20, Issue 1, pp. 30 - 59
Journal Article