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
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
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
A129Xe NMR study of highly cadmium-exchanged zeolite Y
Applied Magnetic Resonance - Tập 8 - Trang 415-425 - 1995
T. Sprang, B. Boddenberg
The adsorption isotherms of carbon monoxide and xenon as well as the129Xe NMR chemical shifts of xenon in highly (68 and 87%) cadmium-exchanged zeolite NaY were measured. The complete set of experimental data can quantitatively be reproduced with a model that considers localized adsorption of both adsorbate molecules on cadmium and sodium cation sites in the supercages. The concentrations of the s...... hiện toàn bộ
NMR Analysis of the Water-Soluble Fraction of Airborne Pollen Particles
Applied Magnetic Resonance - Tập 44 - Trang 1347-1358 - 2013
Marie-Cecile G. Chalbot, Gonçalo Gamboa da Costa, Ilias G. Kavouras
The analysis of ambient organic aerosols by nuclear magnetic resonance (NMR) spectroscopy is limited because of the large number of organic compounds present at low concentrations. Here, we demonstrate the integrative analysis of NMR spectra of airborne pollen particles using reference spectra, spectral similarity metrics, principal components analysis (PCA), and a chemical mass balance model to d...... hiện toàn bộ
Maximization of the efficiency of the frequency conversion with a spin multiplet subjected to three frequency-correlated fields
Applied Magnetic Resonance - - 2000
F. F. Popescu
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