Apparent diffusion behaviour of intermolecular double-quantum coherence modulated by a distant dipolar field in solution NMR
Apparent diffusion behaviour of intermolecular double-quantum coherence modulated by a distant dipolar field in solution NMR
复制标题
溶液核磁共振中远偶极场调制的分子间双量子相干的表观扩散行为
DOI：
10.1088/1674-1056/18/11/032
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发表时间：
2009-11
影响因子：
1.7
通讯作者：
Cai Shu-Hui
中科院分区：
文献类型：
--
作者：
Shen Gui-Ping;Chen Zhong;Cai Cong-Bo;Cai Shu-Hui
设计了一种改进的相关谱仪（COSY），采用非对称的Z梯度回波探测序列，研究了扩散行为对分子间双量子相干信号衰减的影响。推导了理论公式，并进行了实验测量和模拟。研究发现，分子间双量子相干在预捕获期的扩散行为可能不同于传统的单量子相干，这取决于扩散加权梯度与相干选择梯度的相对取向.当扩散加权梯度的取向平行于或反平行于相干选择梯度的取向时，扩散由远侧偶极场调制。该研究有助于理解分子间双量子相干磁共振成像中信号的性质。
A modified correlated spectroscopy (COSY) revamped with asymmetric Z-gradient echo detection sequence was designed to investigate the influence of diffusion behaviour on intermolecular double-quantum coherence signal attenuation during the pre-acquisition period. Theoretical formulas were deduced and experimental measurements and simulations were performed. It is found that the diffusion behaviour of intermolecular double-quantum coherence in the pre-acquisition period may be different from that of conventional single-quantum coherence, depending on the relative orientation of diffusion weighting gradients to coherence selection gradients. When the orientation of the diffusion weighting gradients is parallel or anti-parallel to the orientation of the coherence selection gradients, the diffusion is modulated by the distant dipolar field. This study is helpful for understanding the signal properties in intermolecular double-quantum coherence magnetic resonance imaging.
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影响因子：
2.5
作者：
F. Fasano;S. Capuani;G. Hagberg;T. Branca;I. Indovina;A. Castriota-Scanderbeg;B. Maraviglia
通讯作者：
F. Fasano;S. Capuani;G. Hagberg;T. Branca;I. Indovina;A. Castriota-Scanderbeg;B. Maraviglia
影响因子：
4.4
作者：
Zhong Chen;J. Zhong
通讯作者：
Zhong Chen;J. Zhong
影响因子：
5.5
作者：
L. Zhang;Z. Liu;†. A. Q. Chen;E. Hansen
通讯作者：
L. Zhang;Z. Liu;†. A. Q. Chen;E. Hansen
影响因子：
56.9
作者：
Warren, WS;Ahn, S;Leigh, JS
通讯作者：
Leigh, JS
影响因子：
2.2
作者：
Kaufmann, I.;Seiberlich, N.;Jakob, P.
通讯作者：
Jakob, P.