When escaping a burning building, a person should move close to the floor where there the air is cooler and clearer to breathe because hot air rises, carrying gases and particulate matter upward.
Pet owners who have accidentally inhaled clay particulate during litter box cleaning can at least support the fact that breathing in clay dust is anything but pleasant.
GE HEPA (High Efficiency Particulate Air Filters) can trap and filter out airborne particulates that fill the air and can cause asthma and other respiratory illnesses.
Soy candles produce less soot - that dark, ashy substance that coats walls, ceilings is a particulate matter made up of carbon and is dangerous to human lungs.
HEPA, or "high efficiency particulate air" filtration, is capable of removing up to 99.97% of airborne particles that are larger than 0.3 micrometers.
HEPA (High Efficiency Particulate Absolute) inspired models employ a combination of mechanical filtration and diffusion principles to purify the air.
Or more probably it may be the weight of definite particulate structures in their vacuoles.
Certain free mobile cells within the body, such as blood-leucocytes, as well as others which are fixed, as for instance the endothelium of the hepatic capillaries, have the property of seizing upon some kinds of particulate matter brought within their reach.
All these principles are consistent with Francis Galton's law of particulate inheritance in heredity, and with the modern doctrine of " unity of characters " held by students of Mendelian phenomena.
We do not yet know whether such absolute blending is possible or not, or whether all apparent blending is only a more or less minutely subdivided " mosaic " of non-combinable characters of the parents, in fact whether the combinations due to heredity in reproduction are ever analogous to chemical compounds or are always comparable to particulate mixtures.