| The heterogeneous distribution of the liquid phase in partially filled porous glasses and its effect on self-diffusion. | |
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MedLine Citation:
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PMID: 17466762 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The spatial distribution of the liquid phase in a typical, partially filled, porous glass (VitraPor #5) has been examined with the aid of magnetic resonance microscopy and field gradient nuclear magnetic resonance diffusometry techniques. The correlation length of the material turned out to be long enough to permit the visualization of the microscopic heterogeneity of the material by magnetic resonance imaging. Contrasts are dominated by transverse relaxation depending on local filling degree, which in turn depends on local microstructure. The bimodal heterogeneity of the latter was also visualized by scanning electron microscopy. The effect of heterogeneity on an effective diffusion coefficient has been examined for polar (water) and nonpolar (cyclohexane) molecules. |
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Authors:
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German Farrher; Ioan Ardelean; Rainer Kimmich |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-01-16 |
Journal Detail:
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Title: Magnetic resonance imaging Volume: 25 ISSN: 0730-725X ISO Abbreviation: Magn Reson Imaging Publication Date: 2007 May |
Date Detail:
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Created Date: 2007-04-30 Completed Date: 2007-07-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8214883 Medline TA: Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 453-6 Citation Subset: IM |
Affiliation:
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Sektion Kernresonanzspektroskopie, Universität Ulm, 89069 Ulm, Germany. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cyclohexanes* Diffusion Fourier Analysis Glass / chemistry* Imaging, Three-Dimensional / methods Magnetic Resonance Imaging / methods Magnetic Resonance Spectroscopy / methods Microscopy, Electron, Scanning / methods Porosity Water / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Cyclohexane; 0/Cyclohexanes; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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