Biodeterioration of Building Timbers in the High-Water-Activity Built Environment of Nigeria  

作　　者：Isa Hassan-Enua Mshelgaru Kabir Bala Sani Usman Kunya 

机构地区：[1]Department of Building, Faculty of Environmental Design, Ahmadu Bello University, Zaria 8100001, Nigeria [2]Department of Building, School of Environmental Technology, Abubakar Tafawa Balewa University, Bauchi 740001, Nigeria

出　　处：《Journal of Civil Engineering and Architecture》2016年第7期762-769,共8页土木工程与建筑（英文版）

摘　　要：Moulds have been reported to destroy volumes of timbers in buildings annually. As a result, timber components within the built environment decline and fail to fulfill their basic requirements. This research focused on the isolation and evaluation of the prevalence and effects of deteriorating moulds in the rain forest and swampy rain forest regions of Nigeria where the water activity is as high as 0.7. To accomplish this, decayed timber samples were aseptically collected on buildings from six strategic locations. The samples were serially diluted and inoculated onto Sabouraud Dextrose Agar medium in Petal dishes. The Petri dishes were incubated for 72 h at 30 ~C. Thereafter, moulds were isolated through visual and microscopic observations. The commonly encountered moulds were evaluated and analyzed. It was observed that, prevalence of moulds on buildings used for non residential purpose were higher. There was no significant difference between the prevalence on the components located inside the building and those outside the building. Ceiba pentandra exhibited highest degradation while Masonia altissima resisted most. The most deteriorating moulds were Aspergillus, Mucor, Rhizopus and Gliocladium. The deteriorations of Ceiba pentandra, Afzelia africana, Lophira alata, Anogessus leocarpus and Gossweilerodendron balsamiferum timbers under Aspergillus attack were projected.

关 键 词：Mould timber in building BIODETERIORATION high-water-activity microclimate. 

分 类 号：TS205[轻工技术与工程—食品科学] TU531.1[轻工技术与工程—食品科学与工程]