edited by L M Brown (University of Cambridge, UK), N Collings (University of Cambridge, UK), R M Harrison (University of Birmingham, UK), A D Maynard (National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, USA), & R L Maynard (Department of Health, London, UK)

Following the recognition that airborne particulate matter, even at quite modest concentrations, has an adverse effect on human health, there has been an intense research effort to understand the mechanisms and quantify the effects. One feature that has shone through is the important role of ultrafine particles as a contributor to the adverse effects of airborne particles. In this volume, many of the most distinguished researchers in the field provide a state-of-the-art overview of the scientific and medical research on ultrafine particles.

• Measurements of Number, Mass and Size Distribution of Particles in the Atmosphere (R M Harrison et al.)
• Overview of Methods for Analysing Single Ultrafine Particles (A D Maynard)
• Particles from Internal Combustion Engines — What We Need to Know (N Collings & B R Graskow)
• Ultrafine Particles in Workplace Atmospheres (J H Vincent & C F Clement)
• The Surface Activity of Ultrafine Particles (D A Jefferson)
• Toxicology of Ultrafine Particles: In Vivo Studies (G Oberdörster)
• Ultrafine Particles: Mechanisms of Lung Injury (K Donaldson et al.)
• Differential Epidemiology of Ambient Aerosols (H R Anderson)
• and other articles