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Measurements of Fungal Activity as a Function of Relative Humidity by Isothermal Microcalorimetry

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Author

Summary, in English

The heat produced by the metabolism of a mould fungus (Penicillium brevicompactum) growing on softwood was measured by isothermal calorimetry under different relative humidity (RH) levels during desorption (from 95% to 65% RH) and absorption (from 65% to 95% RH). The humidification method was successful and it was possible to decrease and increase the relative humidity and moisture content in small steps. The calorimetric measurements were difficult to interpret as the thermal power was not constant at most levels. However, a general trend with lowered activity at lower relative humidity was seen. Calorimetry can possibly be used in mapping dynamic mould activity under changing environmental conditions and can therefore be applied in predicting the risk of mould in buildings.

Publishing year

2007

Language

English

Publication/Series

Preprint without journal information

Document type

Journal article

Publisher

Manne Siegbahn Institute

Topic

  • Materials Engineering

Keywords

  • relative humidity
  • softwood
  • mould growth
  • Isothermal calorimetry
  • fungal activity
  • Penicillium brevicompactum

Status

Unpublished

ISBN/ISSN/Other

  • ISSN: 0348-7911