E.R. Jayaratne

TL;DR: In this paper, the authors reviewed and synthesized the existing knowledge on ultrafine particles in the air with a specific focus on those originating due to vehicles emissions and focused on secondary particle formation in urban environments resulting from semi volatile precursors emitted by the vehicles.

TL;DR: In this article, the authors reviewed existing literature to identify state-of-the-art experimental techniques used for personal exposure assessment; compare exposure levels reported for domestic/school settings in different countries, assess the contribution of outdoor background vs indoor sources to personal exposure; and examine scientific understanding of the risks posed by personal exposure to indoor aerosols.

TL;DR: In this article, a 5-year monitoring period showed that the mean particle number concentration on weekdays was (8.8±0.1)×103 cm−3 and on weekends (5.9± 0.2)× 103 cm −3, a difference of 47%.

TL;DR: Particle emissions from twelve buses, operating alternately on low sulfur (LS) and ultralow sulfur (ULS) diesel fuel, were monitored, suggesting that sulfur in diesel fuel was playing a major role in the formation of nanoparticles.

TL;DR: In general, LPG was found to be a 'cleaner' fuel, although in most cases, the differences were not statistically significant owing to the large variations between emissions from different vehicles.