Fungal spore fragmentation as a function of airflow rates and fungal generation methods

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

21 Scopus Citations
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Author(s)

  • Hussein Kanaani
  • Megan Hargreaves
  • Zoran Ristovski
  • Lidia Morawska

Detail(s)

Original languageEnglish
Pages (from-to)3725-3735
Journal / PublicationAtmospheric Environment
Volume43
Issue number24
Publication statusPublished - Aug 2009
Externally publishedYes

Abstract

The aim of this study was to characterise and quantify the fungal fragment propagules derived and released from several fungal species (Penicillium, Aspergillus niger and Cladosporium cladosporioides) using different generation methods and different air velocities over the colonies. Real time fungal spore fragmentation was investigated using an Ultraviolet Aerodynamic Particle Sizer (UVASP) and a Scanning Mobility Particle Sizer (SMPS). The study showed that there were significant differences (p <0.01) in the fragmentation percentage between different air velocities for the three generation methods, namely the direct, the fan and the fungal spore source strength tester (FSSST) methods. The percentage of fragmentation also proved to be dependent on fungal species. The study found that there was no fragmentation for any of the fungal species at an air velocity ≤0.4 m s-1 for any method of generation. Fluorescent signals, as well as mathematical determination also showed that the fungal fragments were derived from spores. Correlation analysis showed that the number of released fragments measured by the UVAPS under controlled conditions can be predicted on the basis of the number of spores, for Penicillium and A. niger, but not for C. cladosporioides. The fluorescence percentage of fragment samples was found to be significantly different to that of non-fragment samples (p <0.0001) and the fragment sample fluorescence was always less than that of the non-fragment samples. Size distribution and concentration of fungal fragment particles were investigated qualitatively and quantitatively, by both UVAPS and SMPS, and it was found that the UVAPS was more sensitive than the SMPS for measuring small sample concentrations, whilethe results obtained from the UVAPS and SMAS were not identical for the same samples. © 2009 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Air velocity, Fluorescent percentage, Fragments, Fungal spores

Citation Format(s)

Fungal spore fragmentation as a function of airflow rates and fungal generation methods. / Kanaani, Hussein; Hargreaves, Megan; Ristovski, Zoran; Morawska, Lidia.

In: Atmospheric Environment, Vol. 43, No. 24, 08.2009, p. 3725-3735.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review