Romanian Academy P. Poni Institute of Macromolecular Chemistry, Department of Physical Chemistry of Polymers, 41A Gr. Ghica Voda Alley, Iasi, Romania.
Carbohydr Res. 2010 Jun 16;345(9):1149-55. doi: 10.1016/j.carres.2010.03.022. Epub 2010 Mar 21.
The effects of the soft-rot fungus Trichoderma viride Pers., on the thermal behavior of lime wood (Tillia cordata Mill.) were investigated. The lime wood pieces were inoculated with the fungus over a 12-week period. At pre-established time intervals two samples were withdrawn from the medium and analyzed by thermogravimetry and differential calorimetry, and the results were correlated with mass loss. Fungal activity was indicated by continuous decrease of sample mass. Modification of the wood because of the presence of the fungus was evidenced by structural changes that affected its thermal properties, both in respect to the hydrophilicity of the wood (evidenced mainly in desorption process) and in its decomposition behavior. The shape of DTG curves depends on the exposure time of wood to the action of microorganisms. The peak temperature assigned to the decomposition of wood components increases, while the global kinetic parameters for the main peak decrease with increasing exposure time of the wood to the attack by microorganisms. The increased characteristic temperatures of water desorption and cellulose decomposition processes and lower thermal stability could be explained by newly formed structures, mainly the oxidized ones.
研究了绿色木霉（Trichoderma viride Pers.）对椴木（Tillia cordata Mill.）热行为的影响。椴木试件在 12 周的时间内接种真菌。在预先设定的时间间隔内，从培养基中取出两个样品，通过热重分析和差示量热法进行分析，并将结果与质量损失相关联。真菌活性表现为样品质量的持续下降。由于真菌的存在而导致的木材改性，通过影响其热性能的结构变化得到证实，包括木材的亲水性（主要表现在解吸过程中）及其分解行为。DTG 曲线的形状取决于木材暴露于微生物作用的时间。分配给木材成分分解的峰值温度升高，而木材暴露于微生物攻击的时间增加时，主要峰的整体动力学参数减小。水解析和纤维素分解过程的特征温度升高以及热稳定性降低，可以用新形成的结构来解释，主要是氧化结构。
