… century a new particle type—the ultrafine particle—has emerged as one with a potential
role in causing disease. Ultrafine particles have been the subject of several recent reviews.2 …

… fine particles, and PM 0.1 (particles ≤0.1 µm in diameter), also called ultrafine particles (this …
, in part, result from how these particles navigate the small bronchioles and lung defenses. …

… Spatial variability in ultrafine particle concentrations across cities is assessed. … emergence
of unregulated pollutants, such as airborne ultrafine particles (UFPs; diameter less than 100 …

This presentation is a summarized review of the achievements of the ultrafine particle (UFP)
project, which was a 5‐yr research and development project inaugurated in 1981 by …

… administered to the lung cause a greater inflammatory response than do larger particles, …
important role in ultrafine particle toxicity. Contributing to the effects of ultrafine particles is their …

… composition of ultrafine particles in the atmosphere of cities. Ultrafine particle samples …
Measurements of ultrafine particle mass concentration made in seven Southern California …

… The association between fine and ultrafine particles and … The size distribution of ambient
particles in the range of 0.01 to … Most of the particles (73%) were in the ultrafine fraction (…

… Studies with ultrafine particles mentioned in this manuscript have been supported by the
Health Effects Institute (contract no. 95-11) and by the National Institute of Health Sciences …

… (<0.1 μm), where the degree of toxicity becomes greater for smaller particles. These particles
can … , and existing control mechanisms for ultrafine particles (UFPs) in the last fifteen years. …

… understandings of the likely mechanism of lung injury caused by ultrafine particles. By
using a range of different ultrafine particles and their fine counterparts we have sought to learn …