Applied Magnetic Resonance

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Regularities of the spin exchange coupling through a bridge in nitroxide biradicals
Applied Magnetic Resonance - Tập 26 - Trang 253-274 - 2004
A. I. Kokorin
The current state, achievements, problems and prospects of the intramolecular electron spin exchange interaction as a function of the nitroxide biradical composition and structure, type of the radical ring, temperature and the solvent nature are considered on the basis of the literature data and the results of our own experiments.
Hydrogen-Bonded Complexes of Neutral Nitroxide Radicals with 2-Propanol Studied by Multifrequency EPR/ENDOR
Applied Magnetic Resonance - Tập 53 - Trang 1239-1263 - 2021
Anton Savitsky, Anna Nalepa, Taras Petrenko, Martin Plato, Klaus Möbius, Wolfgang Lubitz
The hydrogen bond plays a key role in weak directional intermolecular interactions. It is operative in determining molecular conformation and aggregation, and controls the function of many chemical systems, ranging from inorganic, organic to biological molecules. Although an enormous amount of spectroscopic information has been collected about hydrogen-bond formation between molecules with closed-...... hiện toàn bộ
Development of isoindoline nitroxides for EPR oximetry in viable systems
Applied Magnetic Resonance - Tập 22 - Trang 357-368 - 2002
J. Shen, S. Bottle, N. Khan, O. Grinberg, D. Reid, A. Micallef, H. Swartz
Nitroxides are widely used as biophysical probes to study molecular motion, intracellular oxygen, pH, transmembrane potential, and cellular redox metabolism, etc. They may be rapidly metabolized to hydroxylamines by cells, which limits their use in viable systems. In this study, we have characterized relevant properties in cells of several isoindoline nitroxides that have been prepared to have dif...... hiện toàn bộ
Two-Frequency Planar Gradiometer for Distant NQR Detection of Explosives
Applied Magnetic Resonance - Tập 52 - Trang 1787-1797 - 2021
Rustem R. Khusnutdinov, G. V. Mozzhukhin, A. B. Konov, Y. Ozturk, B. Z. Rameev
The experimental realization of the two-frequency 14N nuclear quadrupole resonance (NQR) technique with use of the gradiometer radiofrequency (RF) probe for applications in the remote detection of explosives and other substances has been proposed. The planar two-frequency gradiometer has been designed, modeled and manufactured. The regions, where the RF magnetic fields are nearly orthogonal to eac...... hiện toàn bộ
Transceiver-Phased Arrays for Human Brain Studies at 7 T
Applied Magnetic Resonance - Tập 41 - Trang 483-506 - 2011
Nikolai I. Avdievich
The paper describes technological advances in high-field (7 T) transceiver-phased arrays developed for magnetic resonance imaging of the human brain. The first part of this work describes an 8-element inductively decoupled split elliptical transceiver-phased array with selectable geometry, which provides an easy and efficient way of compensating for changes in mutual inductive coupling associated ...... hiện toàn bộ
Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals
Applied Magnetic Resonance - Tập 35 - Trang 503-510 - 2009
Xiao-Xuan Wu, W. Fang, W. -L. Feng, W. -C. Zheng
The electron paramagnetic resonance (EPR) parameters (g-factors g ‖, g ⊥ and zero-field splitting D) of two tetragonal 3d3 impurity centers M3d-VMg and M3d-Li+ (where M3d = Cr3+ or Mn4+, VMg is the Mg2+ vacancy) in M3d-doped MgO crystals are calculated from the high-order perturbation formulas including both the crystal-field (CF) and the charge-tran...... hiện toàn bộ
New magnetic field effects observed in micellar and fluid solutions under ultrahigh fields of up to 30 T
Applied Magnetic Resonance - Tập 18 - Trang 307-319 - 2000
H. Hayashi, Y. Sakaguchi, M. Wakasa, Y. Mori, K. Nishizawa
With magnetic fields of up to 30 T, we have found the saturation and reversion of magnetic field effects (MFEs) on radical pair lifetimes and escape radical yields due to the relaxation mechanism for the photoreduction of carbonyl compounds in micellar solutions as well as the saturation of MFEs on the escape radical yield due to the Δg mechanism for the photoreduction of 4-methoxy-benzophenone wi...... hiện toàn bộ
Measuring Cu2+-Nitroxide Distances Using Double Electron–Electron Resonance and Saturation Recovery
Applied Magnetic Resonance - Tập 44 - Trang 583-594 - 2012
Jessica Sarver, K. Ishara Silva, Sunil Saxena
Distance measurements were obtained between a bound Cu2+ and a spin label on two polypeptides of differing length using the double electron–electron resonance (DEER) and saturation recovery experiments. Distance distributions obtained from the DEER results resolved differences between the average distance and distribution of distances for each peptide. An average distance was also obtained for eac...... hiện toàn bộ
Spatial localization in the heteronuclear coherence transfer from scalar order
Applied Magnetic Resonance - - 1994
D. E. Demco, I. Coroiu
The spatial localization of the heteronuclear coherence transfer from scalar order was analyzed for a rectangular and an adiabatic remagnetization contact pulses. The transferred coherence amplitudes with and without localization were evaluated for different experimental conditions and an AX-1/2 spin-pair system. The use of this method for13C localized spectroscopy is discussed.
Đo Độ Nhớt Vi Mạch Trong Các MMembrane Vesicular Bằng Phương Pháp Cộng Hưởng Spin Điện Tử Dịch bởi AI
Applied Magnetic Resonance - Tập 33 - Trang 269-283 - 2008
G. Buech, W. Herrmann, H.-H. Borchert
Bảy công thức dạng vesicular CER(−), CER(+), CER(I), PC(−), PC(+), DAG(B) và DAG(I) đã được phát triển sử dụng ceramide IIIB (CER), phosphatidylcholine (PC), hoặc diacylglycerides (DAG) làm thành phần lipid chính. B và I chỉ định chất hoạt động mặt phân cực hydrophilic Brij 58 và Imwitor 375, (+) và (−) biểu thị tiềm năng zeta dương và âm. Ảnh hưởng của độ nhớt vi mạch của lớp màng lipid đến đặc đ...... hiện toàn bộ
#độ nhớt vi #màng vesicle #cộng hưởng spin điện tử #ceramide #phosphatidylcholine #diacylglycerides
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