Academic thesis

Merle Strätling: Exploratory Investigation to kill the mycelia of the true dry rot fungus with microwaves. Back
Language: Original   -   Translation
Overview:  
Abstract: The true dry rot fungus, Serpula lacrymans, is one of the most important wood destroying fungi in buildings. For treatment chemical and physical methods have been used. In the present master thesis the possibility of a thermal treatment using microwaves was investigated. Infected wet and dry pinewood samples were exposed in an open system to microwave fields (at a frequency of 2.45 GHz) at different kinds of radiations and for various lengths of time up to temperatures between 25 to 50°C. The achieved temperatures were monitored with an infrared camera. On the basis of growth analyses the minimal temperature required to kill active mycelia in wet samples was determined as 50ºC. To disinfect inactive mycelia in dry samples with a moisture content of 15 - 19% a temperature of 50ºC was not sufficient, implying that higher temperatures or longer treatments are required. Pulsed modes of microwave radiation had no disinfecting effect. Importantly microwave treatments also caused dramatic losses of the moisture content within the wooden samples. It is concluded that the testes methods are not suitable for treatment of sensitive objects of cultural value.

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Keywords: true dry rot fungus, Serpula lacrymans,Conservation, 2.45 Frequency, Microwaves
Details:
  • academic institution:  HAWK Hochschule für angewandte Wissenschaft und Kunst Hildesheim/ Holzminden/Göttingen
  • kind of theses:  Masterarbeit
  • main Tutor:  Prof. Dr. Karin Petersen
  • assistant Tutor:  Prof. Dr. Wibke Unger
  • date:  2007
  • Language:  German
  • pages:  141
  • pictures:  54
 
Contact:
 
Merle Strätling
Heilholtkamp 57
22297  Hamburg
Deutschland
m.straetling@[Diesen Teil loeschen]gmx.de
www.restaurare.de
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