PM2.5 refers to particles of less than 2.5 micrometres.
There are also air quality targets that you can change, grouped into "good quality", "sensitive to particles and pollutants" and "very sensitive to particles and pollutants", which the machine responds to when automatically cleaning the air.
These oscillations correspond to particles in perturbation theory, rippling along through space-time in their merry quantum way.
Long-term exposure to particles is linked to higher levels of fatal heart and lung disease, including lung cancer.
Cases of lung cancer may be from exposure to particles containing lead chromate and to asbestos in the paint trade.
Scientists will have new tools to search for things great and small, from planets to particles.
Pollen spores attach to particles from car exhausts, which then spread pollen in pollution.
This Higgs field, if it exists, exerts a drag on matter passing through it, lending mass to particles that otherwise wouldn't have any.
I.B.M. researchers in Zurich, for example, have been working on a storage device that can read and write information to particles that are only a few atoms wide.
These days implants very seldom break, but fail due to particles produced by wear, which can be investigated using joint simulators based on his work.
Something must happen at the energy range of the LHC in order to give mass to particles.
