Academic thesis

Irene Lieder: Possibilities and limits of plasma treatment at microbially contaminated papers Back
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Abstract: In this paper the application of low-temperature plasma technology was examined in the context of paper conservation. This work is embedded in the DBU research project on the effective reduction of spores and bioaerosols on microbially contaminated archival documents, by means of electrostatically charged foils. The aim was to develop an environment-friendly method that disinfects microbial contaminated surfaces and works with low operating costs. This work is based on a literature research of current publications as well as on independent tests. It also reflects first results from the DBU project, verifies and pursues them. The main focus is on the verification of the efficacy of low-temperature plasma concerning the inactivation of fungal spores found on documents and graphics. For this purpose different sources, which generate plasma by dielectric barrier discharge (DBE), were used. Samples of different materials were exposed to selected microorganisms (Aspergillus niger, Aspergillus versicolor, Cladosporium herbarum, Trichoderma longibrachiatum). Afterwards the potential of DBE-generated plasma to decimate these organisms was evaluated on the basis of cultivation and vitality staining. It has been shown that the share of living spores can be decreased to less than 25 % after 30 seconds of plasma treatment and a complete elimination of Aspergillus versicolor and Trichoderma longibrachiatum is reached after 10 minutes.

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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. Dipl.-Rest. Ulrike Hähner
  • date:  2013
  • Language:  German
  • pages:  121
  • pictures:  128
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