Experimental Verification of the Particle Blocking Feature of Nasal Hair
Although it is well known that nasal hair keeps particles from entering our body, its quantitative evaluation has not been done. In this study, the particle blocking efficiency by nasal hair was studied both experimentally and numerically. The results of laboratory experiments performed with the suc...
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| Format: | Article |
| Language: | English |
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Springer
2019-06-01
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| Series: | Asian Journal of Atmospheric Environment |
| Subjects: | |
| Online Access: | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1601&aidx=20135 |
| _version_ | 1797763262642651136 |
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| author | Chang-Jin Ma |
| author_facet | Chang-Jin Ma |
| author_sort | Chang-Jin Ma |
| collection | DOAJ |
| description | Although it is well known that nasal hair keeps particles from entering our body, its quantitative evaluation has not been done. In this study, the particle blocking efficiency by nasal hair was studied both experimentally and numerically. The results of laboratory experiments performed with the successfully reconstructed artificial nose indicate that nasal breathing is effective in blocking particle (especially the giant particle lager than 5 μm), especially during the exercise respiration mode. At the exercise respiration pattern, two kinds of coarse particles (i.e., particles of 2-5 μm and >5 μm) showed a continuous decrease in particle blocking efficiency (Epb (%)) with increasing breathing duration. All curves drown by the theoretically calculated particle cut-off efficiency of nasal hairs (Einteg.) with three different thicknesses (i.e., 50, 75, and 100 μm) show a minimum (nearly zero) for the particle ranged from 0.004 to 0.4 μm. In the Einteg. curves, the thinner nasal hair can block particles more efficiently through a whole particle size range. |
| first_indexed | 2024-03-12T19:39:04Z |
| format | Article |
| id | doaj.art-1bd62264c0784877829636294a4dcd12 |
| institution | Directory Open Access Journal |
| issn | 1976-6912 2287-1160 |
| language | English |
| last_indexed | 2024-03-12T19:39:04Z |
| publishDate | 2019-06-01 |
| publisher | Springer |
| record_format | Article |
| series | Asian Journal of Atmospheric Environment |
| spelling | doaj.art-1bd62264c0784877829636294a4dcd122023-08-02T03:56:07ZengSpringerAsian Journal of Atmospheric Environment1976-69122287-11602019-06-011329910510.5572/ajae.2019.13.2.099Experimental Verification of the Particle Blocking Feature of Nasal HairChang-Jin Ma0Department of Environmental Science, Fukuoka Women’s University, Fukuoka 813-8529, JapanAlthough it is well known that nasal hair keeps particles from entering our body, its quantitative evaluation has not been done. In this study, the particle blocking efficiency by nasal hair was studied both experimentally and numerically. The results of laboratory experiments performed with the successfully reconstructed artificial nose indicate that nasal breathing is effective in blocking particle (especially the giant particle lager than 5 μm), especially during the exercise respiration mode. At the exercise respiration pattern, two kinds of coarse particles (i.e., particles of 2-5 μm and >5 μm) showed a continuous decrease in particle blocking efficiency (Epb (%)) with increasing breathing duration. All curves drown by the theoretically calculated particle cut-off efficiency of nasal hairs (Einteg.) with three different thicknesses (i.e., 50, 75, and 100 μm) show a minimum (nearly zero) for the particle ranged from 0.004 to 0.4 μm. In the Einteg. curves, the thinner nasal hair can block particles more efficiently through a whole particle size range.http://asianjae.org/_common/do.php?a=full&b=11&bidx=1601&aidx=20135nasal hairparticlehealth effectparticle blockinginhalation |
| spellingShingle | Chang-Jin Ma Experimental Verification of the Particle Blocking Feature of Nasal Hair Asian Journal of Atmospheric Environment nasal hair particle health effect particle blocking inhalation |
| title | Experimental Verification of the Particle Blocking Feature of Nasal Hair |
| title_full | Experimental Verification of the Particle Blocking Feature of Nasal Hair |
| title_fullStr | Experimental Verification of the Particle Blocking Feature of Nasal Hair |
| title_full_unstemmed | Experimental Verification of the Particle Blocking Feature of Nasal Hair |
| title_short | Experimental Verification of the Particle Blocking Feature of Nasal Hair |
| title_sort | experimental verification of the particle blocking feature of nasal hair |
| topic | nasal hair particle health effect particle blocking inhalation |
| url | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1601&aidx=20135 |
| work_keys_str_mv | AT changjinma experimentalverificationoftheparticleblockingfeatureofnasalhair |