caa a22 4500 445863919 CHVBK 20180317145452.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10453-010-9178-7 doi (NATIONALLICENCE)springer-10.1007/s10453-010-9178-7 (1→3)-β- d -glucan in different background environments and seasons [Elektronische Daten] [Anne Madsen, Margit Frederiksen, Leila Allermann, Jan Peitersen] This study was undertaken to investigate how the length of the extraction period influences the (1→3)-β-d-glucan (β-glucan) yield and also to examine the background concentration of β-glucan as airborne β-glucan in outdoor environments in different seasons and as concentrations in airborne and floor dust in offices. To ensure compatibility between results obtained in different laboratories, it is important to use optimal and standardised methods to extract and quantify β-glucan. In this study, an extraction period of 60min gave the highest β-glucan yield. The median concentration of β-glucan in 44 floor dust samples was 597μgg−1 dust. The median concentration of airborne β-glucan in offices was 5.1ngm−3 in the summer and 2.3ngm−3 in the winter, and the outdoor median concentration in towns was 6.8ngm−3. The outdoor airborne concentration of β-glucan was significantly lower in January, November and December than during the rest of year. In July, the median airborne concentration of β-glucan was 14 times higher than in January. Furthermore, the airborne concentration of β-glucan was significantly higher in July than in March, April, May, September and October. In the summertime, we found that the indoor airborne concentration of β-glucan was lower than outdoor concentrations. This is in accordance with measurements of concentrations of airborne pollen and culturable fungal spores showing higher outdoor than indoor concentrations during the summer months. Springer Science+Business Media B.V., 2010 (1→3)-β- d -glucan nationallicence Bioaerosol nationallicence Extraction of (1→3)-β- d -glucan nationallicence Inflammation nationallicence Mould nationallicence Pollen nationallicence Madsen Anne National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut Frederiksen Margit National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut Allermann Leila National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut Peitersen Jan National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut Aerobiologia Springer Netherlands 27/2(2011-06-01), 173-179 0393-5965 27:2<173 2011 27 10453 https://doi.org/10.1007/s10453-010-9178-7 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10453-010-9178-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Madsen Anne National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut NATIONALLICENCE 700 1- Frederiksen Margit National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut NATIONALLICENCE 700 1- Allermann Leila National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut NATIONALLICENCE 700 1- Peitersen Jan National Research Centre for the Working Environment, Lersø Parkallé, 105 2100, Copenhagen Ø, Denmark aut NATIONALLICENCE 773 0- Aerobiologia Springer Netherlands 27/2(2011-06-01), 173-179 0393-5965 27:2<173 2011 27 10453 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer