Muhammad Abdullah Khan, Tasneem Zahra Rizvi, Naheed Abdullah, Muhammad Yar Zaheer, Muhammad Zafar Iqbal, Shoaib Sadiq
Dielectrically Observed Consequences of Microbial Treatment of Wood and Bamboo
Summary
Changes in dielectric constant and loss factor of two different species of wood namely Sheesham (Dalbergia
Sissoo) and Bamboo (Bambusa sp) are reported in the frequency range 30 Hz–3 MHz following
their microbial treatment with Coriolus versicolor. Comparison of dielectric data of C. versicolor treated
and untreated wood obtained in oven dried samples and in the samples exposed to atmospheric moisture
for more than 2 weeks reflect the alteration in chemical composition of the wood after C. versicolor
treatment and its associated altered hydration behaviour. In all the experiments described here the
principal feature of the frequency dependent dielectric response is a low frequency dispersion in ?? and
?? and a weak loss peak observed at a higher frequency. The low frequency dispersion is attributed to
localised hopping of charge carriers between neighbouring sites and the higher frequency peak to the
reorientation of polar sub molecular species of constituent molecules.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 54, 07/2000
Pages: 335 - 339
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