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

Li, Yujing LU ; Wadsö, Lars LU and Bjurman, Jonny (2007) In Preprint without journal information
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
unpublished
subject
keywords
relative humidity, softwood, mould growth, Isothermal calorimetry, fungal activity, Penicillium brevicompactum
in
Preprint without journal information
pages
14 pages
publisher
Manne Siegbahn Institute
ISSN
0348-7911
language
English
LU publication?
yes
id
bdd259be-64b0-4c3c-9e9a-175b97f0e150 (old id 1530152)
date added to LUP
2010-01-21 09:02:23
date last changed
2016-04-16 03:57:33
@article{bdd259be-64b0-4c3c-9e9a-175b97f0e150,
  abstract     = {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.},
  author       = {Li, Yujing and Wadsö, Lars and Bjurman, Jonny},
  issn         = {0348-7911},
  keyword      = {relative humidity,softwood,mould growth,Isothermal calorimetry,fungal activity,Penicillium brevicompactum},
  language     = {eng},
  pages        = {14},
  publisher    = {Manne Siegbahn Institute},
  series       = {Preprint without journal information},
  title        = {Measurements of Fungal Activity as a Function of Relative Humidity by Isothermal Microcalorimetry},
  year         = {2007},
}