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Related Experiment Videos

Fungal bioturbation paths in a compact disk.

J Garcia-Guinea1, V Cárdenes, A T Martínez

  • 1Museo Nacional de Ciencias Naturales, CSIC, C/Jose Gutierrez Abascal 2, 28006 Madrid, Spain. guinea@mncn.csic.es

Die Naturwissenschaften
|September 27, 2001
PubMed
Summary

Fungal growth on compact disks (CDs) caused bioturbation, creating micro-dendrite textures and destroying data pits. This biodeterioration was linked to Geotrichum fungus in a humid, tropical environment.

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Area of Science:

  • Microbiology
  • Materials Science
  • Environmental Science

Background:

  • Compact disks (CDs) are composed of polycarbonate and aluminum layers.
  • Biodeterioration of digital media is an emerging concern.
  • Tropical environments with high humidity and temperature can accelerate material degradation.

Purpose of the Study:

  • To investigate the cause of severe biodeterioration observed on compact disks.
  • To identify the microorganisms responsible for damaging CD material.
  • To characterize the physical and textural changes in the affected CDs.

Main Methods:

  • Observation of bioturbation traces and micro-dendrite textures on damaged CDs.
  • Isolation and identification of fungal species from CD fragments.

Related Experiment Videos

  • Microscopic examination of fungal hyphae proliferation within the CD material.
  • Analysis of CD material composition (aluminum and polycarbonate).

    • Main Results:

    • Bioturbation traces with micro-dendrite textures were found on CDs.
    • Fungal hyphae were observed proliferating in deteriorated zones.
    • A Geotrichum-type fungus was successfully isolated from surface-sterilized CD fragments.
    • The observed biodeterioration is attributed to the slow growth of this fungus.

    Conclusions:

    • Geotrichum fungus can cause significant biodeterioration of compact disk material.
    • The degradation process involves the destruction of information pits due to fungal activity.
    • Tropical indoor conditions (high temperature and humidity) likely facilitate this fungal growth and material decay.