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)
刊名JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
2014
卷号26期号:8页码:1763-1768
关键词Biofilms Characterization EPS Sulfur XANES
学科分类Environmental Sciences & Ecology
DOI10.1016/j.jes.2014.06.017
英文摘要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.
收录类别SCI
WOS记录号WOS:000340738000023
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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
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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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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