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31P NMR chemical shielding tensors of diethyl [5,6-dichloro-1,3-benzodioxol-(2)] phosphonate

Autor: J. Rohonczy, F. Ermark, Gotthard Klose, M. Schulz, Ulrich Haeberlen

Publikováno v: Chemical Physics Letters. 180:23-27

The 31P NMR chemical-shift tensors of diethyl [5,6-dicholoro-1,3-benzodioxol-(2)] phosphonate were measured in a single crystal. A crystal symmetry of P1 in contrast to P1− claimed by earlier X-ray studies was found. The principal values of the 31P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd8fa233113d8f31e7947890d00e9510
https://doi.org/10.1016/0009-2614(91)87110-w

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31P NMR study of the influence of defects on the symmetry of ferroelectric crystals of PbHPO4above the phase transition

Autor: U Haeberlen, F Ermark

Publikováno v: Journal of Physics: Condensed Matter. 3:1909-1914

The width delta v of the 31P NMR in PbHPO4 is found to be larger in the paraelectric than in the ferroelectric phase. The authors interpret this increase of delta v as an unresolved splitting due to the persistence of the low temperature ferroelectri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::152216b4622cd59317ba9134878114b8
https://doi.org/10.1088/0953-8984/3/12/021

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Proton-Phosphor-Doppelresonanz-MR-Spektroskopie am Kernspin-Tomographen

Autor: R. Sauter, F. Ermark, H.-J. Zabel, Walter J. Lorenz, P. Bachert-Baumann, Wolfhard Semmler

Publikováno v: Zeitschrift für Medizinische Physik. 1:169-172

Zusammenfassung In 31 P- 1 H-Doppelresonanz-Experimenten an einem 1,5-Tesla Ganzkorper-MR-System wurden betrachtliche 31 P-MR-Signalintensitatszunahmen von in vivo 31 P-Resonanzen beobachtet (bis ca. 70 % fur die Phosphokreatin-Resonanz in Spektren v

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e54cf644bbc3b2888cd1b3ba0f995113
https://doi.org/10.1016/s0939-3889(15)70861-5

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In vivo nuclear overhauser effect in31P- {1H} double-resonance experiments in a 1.5-T whole-body MR system

Autor: R. Sauter, Wolfhard Semmler, H. J. Zabel, Walter J. Lorenz, P. Bachert-Baumann, F. Ermark

Publikováno v: Magnetic Resonance in Medicine. 15:165-172

In 31P- {1H} MR experiments of humans in a 1.5-T whole-body system, signal intensity enhancements of 1P resonances of up to 68 ± 4% (for phosphocreatine of the calf muscle) have been observed upon irradiation at proton frequency. This observation is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47ba7c2b089f97e7ca776f4ba7440abd
https://doi.org/10.1002/mrm.1910150119

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Structural modulation and low-frequency excitations in the incommensurate phases of biphenyl

Autor: F. Ermark, L. von Laue, Ulrich Haeberlen, Armin Gölzhäuser, U. Häcker

Publikováno v: Journal of Physics: Condensed Matter
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The incommensurate phases IC II and IC III of biphenyl are investigated by means of NMR. It is shown that the structural modulation appears along one direction, and can be described by a periodic twisting of the phenyl rings about the molecular axis.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::618999733fa1092e8557aa13a1f6d43f
http://www.iop.org/EJ/abstract/0953-8984/8/22/003

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Real-time follow-up of 5-fluorouracil metabolism in the liver of tumor patients by means of F-19 MR spectroscopy

Autor: Friedemann Gückel, P. Bachert-Baumann, F Ermark, G. van Kaick, Walter J. Lorenz, Wolfhard Semmler, Peter M. Schlag

Publikováno v: Radiology. 174(1)

Intraarterial 5-fluorouracil (5-FU) chemotherapy in eight patients, one with primary and seven with secondary liver tumors, was monitored by means of in vivo fluorine-19 magnetic resonance (MR) spectroscopy. F-19 MR spectra were obtained with surface

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a44b895a81f91fe03820fd1630612e86
https://pubmed.ncbi.nlm.nih.gov/2104675

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Akademický článek

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31P NMR study of the ferroelectric phase transition in PbHPO4

Autor: Robert Blinc, B. Topic, F Ermark, Ulrich Haeberlen

Publikováno v: Journal of Physics: Condensed Matter

The 31P chemical shift tensors were measured in the paraelectric (P) and ferroelectric (F) phases of PbHPO4. They reflect the approximate C2v and C3 point symmetries of the 31P sites in the P and F phases of the crystal. The transition from C2v to C3

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82b4634f4428bd304c711097a1da70ea
https://doi.org/10.1088/0953-8984/1/32/018

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