Lewinska Anna M, Hoof Jakob B, Peuhkuri Ruut H, Rode Carsten, Lilje Osu, Foley Matthew, Trimby Patrick, Andersen Birgitte
Department of Bioengineering and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark.
Department of Bioengineering and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark.
J Microbiol Methods. 2016 Oct;129:28-38. doi: 10.1016/j.mimet.2016.07.022. Epub 2016 Jul 28.
Fungal growth in indoor environments is associated with many negative health effects. Many studies focus on brown- and white-rot fungi and their effect on wood, but there is none that reveals the influence of soft-rot fungi, such as Stachybotrys spp. and Chaetomium spp., on the structure of building materials such as plywood and gypsum wallboard. This study focuses on using micro-computed tomography (microCT) to investigate changes of the structure of plywood and gypsum wallboard during fungal degradation by S. chartarum and C. globosum. Changes in the materials as a result of dampness and fungal growth were determined by measuring porosity and pore shape via microCT. The results show that the composition of the building material influenced the level of penetration by fungi as shown by scanning electron microscopy (SEM). Plywood appeared to be the most affected, with the penetration of moisture and fungi throughout the whole thickness of the sample. Conversely, fungi grew only on the top cardboard in the gypsum wallboard and they did not have significant influence on the gypsum wallboard structure. The majority of the observed changes in gypsum wallboard occurred due to moisture. This paper suggests that the mycelium distribution within building materials and the structural changes, caused by dampness and fungal growth, depend on the type of the material.
室内环境中的真菌生长与许多负面健康影响相关。许多研究聚焦于褐腐菌和白腐菌及其对木材的影响，但尚无研究揭示诸如葡萄穗霉属和毛壳菌属等软腐菌对胶合板和石膏墙板等建筑材料结构的影响。本研究着重利用微型计算机断层扫描（microCT）来研究在被chartarum葡萄穗霉和球形毛壳菌真菌降解过程中胶合板和石膏墙板结构的变化。通过microCT测量孔隙率和孔隙形状来确定因受潮和真菌生长导致的材料变化。结果表明，如扫描电子显微镜（SEM）所示，建筑材料的成分影响真菌的渗透程度。胶合板似乎受影响最大，水分和真菌贯穿样品的整个厚度进行渗透。相反，真菌仅在石膏墙板的顶层纸板上生长，并且它们对石膏墙板结构没有显著影响。石膏墙板中观察到的大多数变化是由水分引起的。本文表明，建筑材料内的菌丝体分布以及由受潮和真菌生长引起的结构变化取决于材料的类型。
