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Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen
Aerosol mist particles generated near the surface of a liquid nitrogen container were measured and analyzed. The particles present at various distances from the boiling surface of liquid nitrogen were detected using an optical particle counter. In this experiment, 3 micrometer particles exhibited a...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037935/ https://www.ncbi.nlm.nih.gov/pubmed/32046203 http://dx.doi.org/10.3390/ijerph17031071 |
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author | Lee, Byung Uk |
author_facet | Lee, Byung Uk |
author_sort | Lee, Byung Uk |
collection | PubMed |
description | Aerosol mist particles generated near the surface of a liquid nitrogen container were measured and analyzed. The particles present at various distances from the boiling surface of liquid nitrogen were detected using an optical particle counter. In this experiment, 3 micrometer particles exhibited a more than 100-fold increase in concentration due to the liquid nitrogen surface. However, 0.3 micrometer and 10 micrometer particles showed smaller variations (2% to 79%) in their concentrations in the vicinity of liquid nitrogen. The distance from the boiling surface of the liquid nitrogen strongly affected the variations in particle concentration. The variations in aerosol concentrations were significant within 20 cm of the liquid nitrogen surface. These results can be considered as a useful quantitative environmental guideline in cryogenic studies that use liquid nitrogen, and this concept can be applied to cryogenic aerosol mist generation mechanisms. |
format | Online Article Text |
id | pubmed-7037935 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70379352020-03-10 Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen Lee, Byung Uk Int J Environ Res Public Health Technical Note Aerosol mist particles generated near the surface of a liquid nitrogen container were measured and analyzed. The particles present at various distances from the boiling surface of liquid nitrogen were detected using an optical particle counter. In this experiment, 3 micrometer particles exhibited a more than 100-fold increase in concentration due to the liquid nitrogen surface. However, 0.3 micrometer and 10 micrometer particles showed smaller variations (2% to 79%) in their concentrations in the vicinity of liquid nitrogen. The distance from the boiling surface of the liquid nitrogen strongly affected the variations in particle concentration. The variations in aerosol concentrations were significant within 20 cm of the liquid nitrogen surface. These results can be considered as a useful quantitative environmental guideline in cryogenic studies that use liquid nitrogen, and this concept can be applied to cryogenic aerosol mist generation mechanisms. MDPI 2020-02-07 2020-02 /pmc/articles/PMC7037935/ /pubmed/32046203 http://dx.doi.org/10.3390/ijerph17031071 Text en © 2020 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Technical Note Lee, Byung Uk Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title | Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title_full | Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title_fullStr | Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title_full_unstemmed | Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title_short | Cryogenic Aerosol Generation: Airborne Mist Particles Surrounding Liquid Nitrogen |
title_sort | cryogenic aerosol generation: airborne mist particles surrounding liquid nitrogen |
topic | Technical Note |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037935/ https://www.ncbi.nlm.nih.gov/pubmed/32046203 http://dx.doi.org/10.3390/ijerph17031071 |
work_keys_str_mv | AT leebyunguk cryogenicaerosolgenerationairbornemistparticlessurroundingliquidnitrogen |