| NMR probe for pressure-jump experiments up to 250 bars and 3 ms jump time. | |
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MedLine Citation:
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PMID: 21034114 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We describe the design and performance of a pressure-jump instrument for time-resolved NMR experiments. Initial pressure of up to 250 bars can be produced by means of a HPLC pump and distilled water as a pressure-transmitting liquid. Fast pressure release at a time resolution of 3 ms is achieved using a fast acting valve driven by a piezostack close to the sample chamber. The pressure-jump cell is placed together with two valves in an especially designed NMR probe, which can be used in standard spectrometers with wide-bore magnets. All functions of the instrument are personal computer controlled. The equipment is designed for investigations on systems of biological interest, especially lipid-water dispersions. A theoretical consideration implies that probably the limited speed of valve opening determines the lower boundary of the jump time. The performance is illustrated by time-resolved NMR spectra across the phase transition of a phospholipid-water dispersion after a pressure jump from 100 bars to atmospheric pressure. |
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Authors:
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U Heuert; M Krumova; G Hempel; M Schiewek; A Blume |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Review of scientific instruments Volume: 81 ISSN: 1089-7623 ISO Abbreviation: Rev Sci Instrum Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-11-01 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
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Languages: eng Pagination: 105102 Citation Subset: IM |
Affiliation:
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Insitut für Physik, Martin-Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, D-06120 Halle/Saale, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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