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Wilkins K Larsen K Simkus M 《Environmental science and pollution research international》2003,10(4):206-208
Since volatile mold metabolites are used for the detection of mold growth in buildings, it was interesting to determine whether different indoor mold species show different affinity for the major components of wood, a common building material. Growth and volatile metabolites were studied when Aspergillus versicolor, Penicillium chrysogenum, and P. palitans were grown on laboratory substrates containing the major wood constituents cellulose, xylan and lignin. Microbial volatile organic compounds (MVOCs) were characterized by thermal desorption/gas chromatography/mass spectroscopy. Growth and volatile metabolites varied considerably and there appeared to be complementary substrate specificities for P. chrysogenum, and P. palitans grown on cellulose and xylan. The failure of A. versicolor to produce characteristic MVOCs when grown on media containing wood constituents suggests that systems using volatile metabolites to detect microbial growth in buildings may be fundamentally unreliable for the detection of this species. 相似文献
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采用水解圈法筛选到一株产碱性木聚糖酶的嗜碱芽孢杆菌NT-16。该菌株产酶的最佳碳源和氮源分别是木糖和胰蛋白胨,其优化的产酶条件为:半纤维素2%,胰蛋白胨1%,Tween-800.1%,K2HPO40.1%,MgSO4·7H2O0.02%,pH值10.0,200r/m,72h,37℃。该菌株产生的木聚糖酶的最适pH为9.0。 相似文献
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