کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5420699 | 1507514 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-resolution study of nuclear magnetic relaxation dispersion of purine nucleotides: Effects of spin-spin coupling
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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![عکس صفحه اول مقاله: High-resolution study of nuclear magnetic relaxation dispersion of purine nucleotides: Effects of spin-spin coupling High-resolution study of nuclear magnetic relaxation dispersion of purine nucleotides: Effects of spin-spin coupling](/preview/png/5420699.png)
چکیده انگلیسی
By combining magnetic field cycling in the range from 0.1Â mT to 7Â T with high-resolution NMR detection the T1 relaxation dispersion (nuclear magnetic relaxation dispersion (NMRD)) of protons in the nucleotides adenosine mono-phosphate and guanosine mono-phosphate was measured in a site-specific way. While at high field the individual spins have distinctly different T1 times, their scalar spin-spin interaction fulfills at low field the condition of strong coupling and leads to convergence of their T1 dispersion curves. In addition, the spin-spin coupling can lead to oscillatory components in the relaxation kinetics traceable to a coupling between spin polarization and coherence in the relaxation process. As a consequence the NMRD curves do not directly reflect the spectral density function of the motional processes, but the effects of motion and spin coupling must be separated for a reliable evaluation. A theoretical approach is described allowing such an analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Nuclear Magnetic Resonance - Volume 34, Issues 1â2, JulyâSeptember 2008, Pages 142-149
Journal: Solid State Nuclear Magnetic Resonance - Volume 34, Issues 1â2, JulyâSeptember 2008, Pages 142-149
نویسندگان
Alexey Kiryutin, Konstantin Ivanov, Alexandra Yurkovskaya, Hans-Martin Vieth,