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Showing results in Developing Partnerships to Explore Postgraduate Training Needs in Aerosol Science

News

Aerosol science is central to a broad range of disciplines extending from drug delivery to the lungs to disease transmission, combustion and energy generation, materials processing, environmental science, and the delivery of agricultural and consumer products.
To ensure the UK is well-placed to meet the future challenges in research in aerosol science, members of the Society convened a Road-Mapping event in early January 2018. Please follow the above link for further information and to view a summary of outputs from the day.

News

An airborne particle which contained enriched uranium has been observed during atmospheric aerosol sampling over the Aleutian Islands, Alaska. The single particle, with vacuum aerodynamic diameter 580 nm and containing an estimated 0.1-1% by mass of uranium, was detected at an altitude of 7 km on 3rd August 2016 during measurements as part of the Atmospheric Tomography (ATom) NASA mission. Finding uranium in airborne particles is uncommon (< 1 in 10,000 particles) but not particularly rare. However, the isotope ratio (Uranium-235 was 3.1% ± 0.5% of Uranium-238, compared with around 0.7% in natural sources) strongly suggests a hitherto undetected anthropogenic source of enriched uranium emission to the atmosphere.

News

Several attempts to reduce high levels of particulate air pollution in Bangkok, Thailand, by cloud seeding to induce rainfall which would wash out aerosols from the atmosphere, have failed to lower PM2.5 levels in the city. High pressure, continental cool air from the north had contributed to raising ‘real-time’ concentrations of PM2.5 to as high as 156 µg m 3 at one monitoring station, which forced the Pollution Control Department to issue warnings for vulnerable populations to stay indoors.

Research

Whilst the spread of influenza virus may commonly be thought to be due to coughing, sneezing, or contact with virus-laden surfaces, a new human volunteer study by researchers at the University of Maryland suggests that the act of breathing alone can spread the virus.
218 nasal swab samples were taken from 142 patients, aged 19-21, confirmed as suffering from either (or both) influenza A or B, while the patients also underwent 30-minute breath sampling capturing aerosols produced during normal breathing and speaking. Aerosols were collected via impaction, either directly (for particles > 5 µm, in this study termed ‘coarse’ particles) or following condensational growth (~ 50 nm to 5 µm, termed ‘fine’).

News

3D-printing has become a useful tool for prototyping and fabricating novel components and electronics, and the aerosol jet technique, rather than using liquid ink, allows printing on length scales as low as 10 µm.
Using silver nanoparticles in an aerosol jet 3D printer, engineers at 3 US universities have developed a new type of strain gauge. Aerosols of size 1 to 5 microns are produced via atomisation of silver nanoparticle-containing ink and aerodynamically focused into a narrow jet. The aerosolised ink is deposited onto a substrate, making several ‘passes’ to build up a porous 3D film.

Research

Traffic-related air pollution has been linked with adverse birth outcomes, in particular low birth weight, for some time, but confounding with noise pollution has been an issue in determining true causal association.
A new study from Imperial College, London has suggested that concentrations of traffic pollutants, especially particulate matter, but not noise (as an independent variable), are associated with low birth weight or being ‘small for gestational age’.

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