Airborne particulate hopanes, steranes, and polycyclic aromatic hydrocarbons (PAHs) were
measured in six size fractions< 1.8 μm particle diameter at one site upwind and two sites …

Motor vehicle emissions usually constitute the most significant source of ultrafine particles
(diameter< 0.1 μm) in an urban environment. Zhu et al.(J. Air Waste Manage. Assoc., 2002 …

Motor vehicle emissions usually constitute the most significant source of ultrafine particles
(diameter< 0.1 μm) in an urban environment, yet little is known about the concentration and …

Source contributions to ultrafine particle number concentrations for a summertime period in
the Eastern US are investigated using the chemical transport model PMCAMx-UF. New …

High frequency spikes in ultrafine number concentration near a roadway intersection arise
from motor vehicles that accelerate after a red light turns green. The present work describes …

Ultrafine particles (UFP) can be defined as having at least one dimension that is less than
100 nanometers. Because of their dimensions, they exhibit unique properties that affect …

Individual organic compounds such as hopanes and steranes (originating in lube oil) and
selected polycyclic aromatic compounds (PAHs)(generated via combustion) found in …

Ambient ultrafine particles (UPs or PM 0.1), PM 2.5 and PM 10 were investigated at the
roadside of Syuefu road in Hsinchu city and in the Syueshan highway tunnel in Taipei …

Vehicular emitted air pollutant concentrations were studied near three types of roadways in
Austin, Texas:(1) State Highway 71 (SH-71), a heavily traveled arterial highway dominated …

Motor vehicles are the dominant source of oxides of nitrogen (NOx), particulate matter (PM),
and certain air toxics (eg, benzene, 1, 3-butadiene) in urban areas. On roadways, motor …