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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.5303
|2 doi
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|a pubmed25n1148.xml
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|a (DE-627)NLM344579921
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|a (NLM)35938541
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Umegawa, Yuichi
|e verfasserin
|4 aut
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1 |
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|a LnDOTA-d8 , a versatile chemical-shift thermometer for 2 H solid-state NMR
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 09.09.2022
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|a Date Revised 04.01.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2022 John Wiley & Sons Ltd.
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|a 2 H solid-state nuclear magnetic resonance (NMR) is a method for examining the mobility and orientation of molecules in the field of biophysics. In studies on lipid bilayer membranes, 2 H NMR is often adopted to detect a phase transition from the gel to the liquid-crystal phase, which is observed as a change in spectral shape, and to evaluate the ordering of lipid alkyl chains using quadrupole coupling values. Because the mobility of membrane lipids is highly temperature dependent, precise temperature control is a prerequisite for evaluating the physical properties of membranes. Generally, NMR instruments monitor the temperature of the variable temperature (VT) gas. The temperature inside the sample tube and the VT gas match only when the heat generated by the radio frequency (rf) pulse emitted from the coil or magic angle spinning is significantly lower than the cooling capacity of the VT gas. In other words, the sample temperature inside the tube depends on the measurement method. Therefore, in this study, we took advantage of temperature-dependent changes in the chemical shift of a paramagnetic metal-ligand complex. We designed and synthesized a deuterated ligand complex and evaluated its temperature dependence as a thermometer for 2 H solid-state NMR spectroscopy. We chose Tb, Dy, Ho, and Er as the paramagnetic central metals. We then measured the 2 H NMR spectrum of each metal complex and confirmed the 2 H chemical shift to be temperature dependent. Furthermore, with the use of the thermometer molecule with Er, we succeeded in accurately evaluating the segmental melting of an alkyl chain in lipid bilayers with 0.1°C accuracy
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a 2H
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|a chemical-shift thermometer
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4 |
|a lanthanide complex
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4 |
|a lipid bilayers
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|a segmental melting
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|a solid-state NMR
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|a Ligands
|2 NLM
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|a Lipid Bilayers
|2 NLM
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| 650 |
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|a Membrane Lipids
|2 NLM
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| 700 |
1 |
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|a Shimonishi, Takeshi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tsuchikawa, Hiroshi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Murata, Michio
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 60(2022), 10 vom: 17. Okt., Seite 1005-1013
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnas
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| 773 |
1 |
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|g volume:60
|g year:2022
|g number:10
|g day:17
|g month:10
|g pages:1005-1013
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|u http://dx.doi.org/10.1002/mrc.5303
|3 Volltext
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