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Characterization of extracellular polymeric substances in the biofilms of typical bacteria by the sulfur K-edge XANES spectroscopy
Lin, HR; Ye, CS; Lv, L; Zheng, CR; Zhang, SH; Zheng, L; Zhao, YD; Yu, X;郑雷; Zhao YD(赵屹东)
2014
发表期刊JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
卷号26期号:8页码:1763-1768
摘要A combined approach of physicochemical extraction and sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy was applied to characterize the extracellular polymeric substances (EPS) of typical bacterial biofilms in this study. Physicochemical analysis showed variation of the contents of DNA, polysaccharide and protein in different fractions of EPS in different mediums. The sulfur K-edge XANES analysis yielded a variety of spectra. Spectral fitting of the XANES spectra utilizing a large set of model compounds showed that there was more reduced sulfur in both LB-EPS (loosely bound EPS) and TB-EPS (tightly bound EPS) of all the biofilms in LB medium than in R2A medium. More oxidized sulfur was identified in LB-EPS than that in TB-EPS, suggesting different niches and physiological heterogeneity in the biofilms. Our results suggested that the sulfur K-edge XANES can be a useful tool to analyze the sulfur speciation in EPS of biofilms. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
关键词Biofilms Characterization EPS Sulfur XANES
学科领域Environmental Sciences & Ecology
DOI10.1016/j.jes.2014.06.017
收录类别SCI
WOS记录号WOS:000340738000023
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225082
专题多学科研究中心
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GB/T 7714
Lin, HR,Ye, CS,Lv, L,et al. Characterization of extracellular polymeric substances in the biofilms of typical bacteria by the sulfur K-edge XANES spectroscopy[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2014,26(8):1763-1768.
APA Lin, HR.,Ye, CS.,Lv, L.,Zheng, CR.,Zhang, SH.,...&赵屹东.(2014).Characterization of extracellular polymeric substances in the biofilms of typical bacteria by the sulfur K-edge XANES spectroscopy.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,26(8),1763-1768.
MLA Lin, HR,et al."Characterization of extracellular polymeric substances in the biofilms of typical bacteria by the sulfur K-edge XANES spectroscopy".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 26.8(2014):1763-1768.
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