News tagged with gas mask

'Off the scale' smog envelops Beijing again

Residents across northern China battled through choking pollution on Tuesday, as air quality levels rose above index limits in Beijing amid warnings that the smog may not clear until Thursday.

dateJan 29, 2013 in Environment
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Titanate cigarette filter could be safer

(PhysOrg.com) -- While current cigarettes are made with a filter created from cellulose acetate which absorbs things like nicotine, tar, and polycyclic aromatic hydrocarbons, Chinese researchers have discovered ...

dateMay 04, 2011 in Nanomaterials report
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Search results for gas mask

Searching for coolant traces in the atmosphere

Fourth generation halogenated coolants and foaming agents have only been in use for a few years. They have replaced persistent greenhouse gases such as R134a, which were used in (car) air conditioning units, ...

dateMar 24, 2015 in Environment
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Nanodust particles in the interplanetary medium

Dust particles smaller than about a wavelength of light are abundant in our solar system, created by collisions between asteroids and from the evaporation of comets. As they scatter sunlight, these particles ...

dateMar 09, 2015 in Astronomy
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List of search results for gas mask