Changes in surface properties of tropical wood species exposed to the Indonesian climate in relation to mold colonies |
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| Authors: | Yanni Sudiyani Sakae Horisawa Keli Chen Shuichi Doi Yuji Imamura |
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| Affiliation: | (1) Research and Development Centre for Applied Physics, LIPI, 13510 Serpong, Tangerang, Indonesia;(2) Institute of Wood Technology, Akita Prefectural University, 016-0876 Akita, Japan;(3) Wood Research Institute, Kyoto University, 611-0011 Kyoto, Japan |
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| Abstract: | Changes in mold populations and genera on the exposed surfaces of tropical hardwoods — albizia (Paraserianthes falcata), kapur (Dryobalanop lanceolata), mahoni (Switenia macrophylla), nangka (Artocarpus heterophyllus), puspa (Schima wallchii) — were investigated. The wood specimens were exposed to the Indonesian climate for 32 weeks. Properties including mass loss, wettability, mold growth (colony-forming units), and mold genera were evaluated. The change in properties after exposure was significantly affected by the wood species, but there was no clear relation between mass loss and the initial chemical components or between wettability and wood density. The number of mold populations was different by exposure period and wood species, but there was no significant effect of climate conditions, such as rainfall and ultraviolet radiation. Of the genera identified,Aureobasidium, Cladosporium, andPenicillium were dominant molds on the exposed wood surfaces. |
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| Keywords: | Tropical hardwood Natural weathering Wettability Mold Wood component |
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