Study of Fungus Community Compositions in Dunhuang Frescoes and Dominant Bacteria Reduction MechanismAU Qiong, Sun (sqqkkw@163.com)

摘要

This paper uses modern molecular biological techniques to examine and analyze the fungus species leading to Dunhuang frescoes corrosion. After the extraction of total DNA in sample and target fragment amplification, clone library construction together with sequence determination and comparison, it can be seen that the series of fungus in Dunhuang frescoes mainly attach to aspergillus, Phialosimplex and Engyodontium. And then, it obtains a reduction Cr (VI) of dominant bacteria Brevibacillus through study, especially taking it as object and using ultrasonic method to get its extracellular polymeric substances (EPS), to analyze the restoring absorption contributions of EPS to Cr (VI). The experimental results show that the removal rate of bacteria EPS to Cr (VI) and total Cr absorptions is 18.58% and 21.12% respectively and absorption contribution is 48.49% and 64.75%, respectively.C1 Qiong, Sun; Beijing Union Univ, Tourism Inst, Beijing, Peoples R ChinaSC Science & Technology - Other Topics; Anthropology; Environmental Sciences & Ecology; Public, Environmental & Occupational Health