Circadian Rhythm of Air-borne Bacteria and Dust Particles in a Mice Breeding Room
| Autor: | Nobutaka Fukuyama, Toru Obara, Korefumi Minakami, Chuhei Yamauchi, Tomoyuki Ueda |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Bacteria
General Veterinary biology Dust particles Air Microbiology Dust General Medicine Noon biology.organism_classification Housing Animal General Biochemistry Genetics and Molecular Biology Circadian Rhythm Mice Animal science Botany Animals Particle Animal Science and Zoology Circadian rhythm Day to day |
| Zdroj: | Experimental Animals. 35:357-361 |
| ISSN: | 1881-7122 0007-5124 |
| DOI: | 10.1538/expanim1978.35.3_357 |
| Popis: | The circadian rhythm of air-borne bacteria and dust particles in a mice breeding room was studied at 1-hour intervals on the first, third and fifth day after accommodation of the animals. The numbers of air-borne bacteria in the room increased day by day after accommodation, and showed a circadian rhythm which went down at about noon and rose with three peaks at about 20:00, 1:00 and 8:00. The numbers of dust particles tended to decrease from day to day, and they showed almost the same circadian rhythm as the air-borne bacteria. Correlations between air-borne bacteria and dust particles were not significant for each particle level on the first day, but were significant for all the particle levels of 0.3, 1, 2, and 5 microns at the third day, and were also significant at particles levels of 0.5 micron or more on the fifth day. |
| Databáze: | OpenAIRE |
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