Characterization of indoor air quality and efficiency of air purifier in childcare centers, Korea
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"Characterization of indoor air qual..." refers background in this paper
...Particulate matter (PM) concentrations indoors are about six times higher than outdoors [4,5]....
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"Characterization of indoor air qual..." refers background or methods in this paper
...According to modern taxonomy based on genetic sequencing, they can cause hypersensitivity pneumonitis, and belong to the larger class of Actinobacteria such as Actinomycetes, Micrococcus and Staphylococcus, which inhabit the skin and dandruff [51]....
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...The counts for air sample plates were corrected for multiple impactions using the positive hole conversion method, and reported as colony-forming units per cubic meter of air (CFU/m3) [51]....
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...Furthermore, sample handling and storage, as well as the analysis of the collected biological particles, are considerably different from the procedures used in general particle sampling [51]....
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...2 mm in the outdoor air, approximately 5e50% appeared to be of biological origin [51]....
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...They may be carried by other particles, such as water droplet residues, plant materials, or the skin fragments of animals [35,51]....
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