Biopolymer and water dynamics in microbial biofilm extracellular polymeric substance.

Biopolymer and water dynamics in microbial biofilm extracellular polymeric substance.
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微生物生物膜细胞外聚合物物质中的生物聚合物和水动力学。

DOI:
10.1021/bm800269h
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发表时间:
2008-09
期刊:
影响因子:
6.2
通讯作者:
Brown, Jennifer R.
Brown, Jennifer R.
中科院分区:
化学2区
文献类型:
--
作者:
Hornemann, Jennifer A.;Lysova, Anna A.;Codd, Sarah L.;Seymour, Joseph D.;Busse, Scott C.;Stewart, Philip S.;Brown, Jennifer R.

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核磁共振 (NMR) 是一种非侵入性和非破坏性工具,能够获取生物膜中的多个可观察量,例如化学成分、扩散以及宏观结构和传输。脉冲梯度自旋回波 (PGSE) NMR 技术用于测量生物膜生物质中的光谱分辨生物大分子扩散,扩展了先前对生物膜中光谱分辨扩散的研究。使用传统 PGSE 技术的反转恢复修改来消除主要的自由水信号,其中来自自由水的信号被最小化,以便查看诸如旋转移动的碳水化合物、DNA 和蛋白质等成分的光谱。从每个光谱峰获得的主要成分的扩散数据表明,生物膜的生物质包含快速和慢速扩散成分。扩散对抗菌和环境挑战的依赖性表明,通过核磁共振测量的聚合物分子动力学是生物膜功能的敏感指标。
Nuclear magnetic resonance (NMR) is a noninvasive and nondestructive tool able to access several observable quantities in biofilms such as chemical composition, diffusion, and macroscale structure and transport. Pulsed gradient spin echo (PGSE) NMR techniques were used to measure spectrally resolved biomacromolecular diffusion in biofilm biomass, extending previous research on spectrally resolved diffusion in biofilms. The dominant free water signal was nulled using an inversion recovery modification of the traditional PGSE technique in which the signal from free water is minimized in order to view the spectra of components such as the rotationally mobile carbohydrates, DNA, and proteins. Diffusion data for the major constituents obtained from each of these spectral peaks demonstrate that the biomass of the biofilm contains both a fast and slow diffusion component. The dependence of diffusion on antimicrobial and environmental challenges suggests the polymer molecular dynamics measured by NMR are a sensitive indicator of biofilm function.
DOI: 10.1063/1.1336810
发表时间: 2001-02-01
期刊: PHYSICS OF FLUIDS
影响因子: 4.6
作者:
Callaghan, PT;Codd, SL
通讯作者: Codd, SL
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期刊: BIOFOULING
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发表时间: 1984-01-01
期刊: AUSTRALIAN JOURNAL OF PHYSICS
影响因子: --
作者:
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DOI: 10.1021/ma00195a073
发表时间: 1989-05-01
期刊: MACROMOLECULES
影响因子: 5.5
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影响因子: 4.4
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