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Journal of Magnetic Resonance (1969)最新文献

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Temperature dependence of g values of Fe(I) and Ru (I) cyanide complexes in a KCl host lattice KCl主体晶格中Fe(I)和Ru (I)氰化物配合物g值的温度依赖性
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90064-E
C.D de Abreu, N.M Pinhal, N.V Vugman
{"title":"Temperature dependence of g values of Fe(I) and Ru (I) cyanide complexes in a KCl host lattice","authors":"C.D de Abreu, N.M Pinhal, N.V Vugman","doi":"10.1016/0022-2364(92)90064-E","DOIUrl":"10.1016/0022-2364(92)90064-E","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Pages 588-592"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90064-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88664192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Nuclear-spin relaxation in paramagnetic solutions when the electronic zero-field splitting and zeeman interactions are of arbitrary magnitude 电子零场分裂和塞曼相互作用为任意量级时顺磁解中的核自旋弛豫
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90056-D
Robert R Sharp
{"title":"Nuclear-spin relaxation in paramagnetic solutions when the electronic zero-field splitting and zeeman interactions are of arbitrary magnitude","authors":"Robert R Sharp","doi":"10.1016/0022-2364(92)90056-D","DOIUrl":"10.1016/0022-2364(92)90056-D","url":null,"abstract":"<div><p>Expressions for the dipolar nuclear-spin relaxation rates in paramagnetic salt solutions have been derived under conditions where the electronic zero-field splitting (zfs) and Zeeman interactions are of arbitrary magnitude and when electron-spin relaxation is rapid compared to molecular reorientation. The theory is intended to provide continuity between the limiting analytical expressions previously derived for the Zeeman limit [Solomon-Bloembergen-Morgan (SBM) theory] and the zfs limit (R. Sharp, <em>J Chem. Phys.</em> <strong>93</strong>, 6921, 1990). The more general solutions parallel the forms of both of these limiting theories in that they are comprised of sums of terms, each term consisting of a mean-square dipolar coupling energy times a spectral density function at one of the transition frequencies of the coupled I-S spin system. Geometric aspects of the problem are exhibited in simplest form in terms of spherical tensors, and the resulting expressions reduce in a straightforward manner to the Zeeman- and zfs-limit equations. As in the limiting theories, the electronspin relaxation time is treated as a parameter of the theory rather than calculated in detail from the time dependence of the electron-spin Hamiltonian. The theory has been applied to the analysis of magnetic field-dependent proton relaxation data of the ligand methyl protons in solutions of tris(acetylacetonato)Mn(III). The agreement with experiment is much superior to that found for SBM theory.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Pages 491-516"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90056-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74381564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
The equivalent of the DQF-COSY experiment, with one transient per t1 value, by use of B1 gradients 等效DQF-COSY实验，使用B1梯度，每个t1值有一个瞬态
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90068-I
J Brondeau , D Boudot , P Mutzenhardt, D Canet
{"title":"The equivalent of the DQF-COSY experiment, with one transient per t1 value, by use of B1 gradients","authors":"J Brondeau ,&nbsp;D Boudot ,&nbsp;P Mutzenhardt,&nbsp;D Canet","doi":"10.1016/0022-2364(92)90068-I","DOIUrl":"10.1016/0022-2364(92)90068-I","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Pages 611-618"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90068-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78127437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Indirect imaging: 14N imaged with 1H {14N} double resonance 间接成像:14N 1H {14N}双共振成像
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90070-N
P Kinchesh, E.W Randall, S.C.R Williams
{"title":"Indirect imaging: 14N imaged with 1H {14N} double resonance","authors":"P Kinchesh,&nbsp;E.W Randall,&nbsp;S.C.R Williams","doi":"10.1016/0022-2364(92)90070-N","DOIUrl":"10.1016/0022-2364(92)90070-N","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Pages 625-630"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90070-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72730569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Editor's note 编者按
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90052-9
{"title":"Editor's note","authors":"","doi":"10.1016/0022-2364(92)90052-9","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90052-9","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Page 451"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90052-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136496405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
113Cd NMR relaxation study of the protein calbindin D9K 钙结合蛋白D9K的核磁共振弛豫研究
Journal of Magnetic Resonance (1969) Pub Date : 1992-12-01 Epub Date: 2004-06-30 DOI: 10.1016/0022-2364(92)90063-D
Johan Kordel , Charlotta Johansson , Torbjorn Drakenberg
{"title":"113Cd NMR relaxation study of the protein calbindin D9K","authors":"Johan Kordel ,&nbsp;Charlotta Johansson ,&nbsp;Torbjorn Drakenberg","doi":"10.1016/0022-2364(92)90063-D","DOIUrl":"10.1016/0022-2364(92)90063-D","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 3","pages":"Pages 581-587"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90063-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79371489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
NMR relaxation in adsorbed water 吸附水的核磁共振弛豫
Journal of Magnetic Resonance (1969) Pub Date : 1992-11-01 Epub Date: 2004-07-13 DOI: 10.1016/0022-2364(92)90263-7
K Overloop, L van Gerven
{"title":"NMR relaxation in adsorbed water","authors":"K Overloop,&nbsp;L van Gerven","doi":"10.1016/0022-2364(92)90263-7","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90263-7","url":null,"abstract":"<div><p>The NMR relaxation behavior of the proton magnetization in adsorbed water is investigated. Longitudinal as well as transverse relaxation of the adsorbed water as a whole shows a distinct nonexponentiality and the nature of this nonexponentiality is studied. Different methods of fitting distribution of relaxation times are examined and various simulated and experimental decay curves are submitted to these fitting methods. The results of these fittings clearly indicate that both the longitudinal and the transverse relaxation of the proton magnetization in adsorbed water is related to two or three discrete components and that there is certainly no broad distribution of relaxation times present in these water-adsorbent systems.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 2","pages":"Pages 303-315"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90263-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90001356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Multiple-pulse sequences for homonuclear decoupling. Experimental verification 同核解耦的多脉冲序列。实验验证
Journal of Magnetic Resonance (1969) Pub Date : 1992-11-01 Epub Date: 2004-07-13 DOI: 10.1016/0022-2364(92)90269-D
J.H Iwamiya, S.W Sinton , H Liu , S.J Glaser , G.P Drobny
{"title":"Multiple-pulse sequences for homonuclear decoupling. Experimental verification","authors":"J.H Iwamiya,&nbsp;S.W Sinton ,&nbsp;H Liu ,&nbsp;S.J Glaser ,&nbsp;G.P Drobny","doi":"10.1016/0022-2364(92)90269-D","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90269-D","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 2","pages":"Pages 367-375"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90269-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91631688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Susceptibility, lineshape, and shimming in high-resolution NMR 高分辨率核磁共振的磁化率、线形和振荡
Journal of Magnetic Resonance (1969) Pub Date : 1992-11-01 Epub Date: 2004-07-13 DOI: 10.1016/0022-2364(92)90258-9
L.F Fuks , F.S.C Huang , C.M Carter , W.A Edelstein , P.B Roemer
{"title":"Susceptibility, lineshape, and shimming in high-resolution NMR","authors":"L.F Fuks ,&nbsp;F.S.C Huang ,&nbsp;C.M Carter ,&nbsp;W.A Edelstein ,&nbsp;P.B Roemer","doi":"10.1016/0022-2364(92)90258-9","DOIUrl":"10.1016/0022-2364(92)90258-9","url":null,"abstract":"<div><p>The field inhomogeneity caused by an object of known susceptibility and shape is calculated. The field perturbation is derived using the method of equivalent magnetic charges. Lineshapes are calculated by summing Lorentzians over the sample volume and are verified experimentally by observing changes caused by introducing material into the vicinity of a previously shimmed NMR sample. Such lineshapes can be used for the determination of susceptibility of materials.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 2","pages":"Pages 229-242"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90258-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90405400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 37
Chemical-shift ranges in proteins 蛋白质中的化学位移范围
Journal of Magnetic Resonance (1969) Pub Date : 1992-11-01 Epub Date: 2004-07-13 DOI: 10.1016/0022-2364(92)90267-B
Joseph Augspurger , John G Pearson , Eric Oldfield , Clifford E Dykstra , Ki Deok Park , Dwight Schwartz
{"title":"Chemical-shift ranges in proteins","authors":"Joseph Augspurger ,&nbsp;John G Pearson ,&nbsp;Eric Oldfield ,&nbsp;Clifford E Dykstra ,&nbsp;Ki Deok Park ,&nbsp;Dwight Schwartz","doi":"10.1016/0022-2364(92)90267-B","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90267-B","url":null,"abstract":"<div><p>The results of ab initio derivative Hartree-Fock calculations of the dipole and quadrupole shielding polarizabilities and hyperpolarizabilities of a number of small molecules are reported, together with estimates of the electric fields and field gradients present in proteins. It is argued that weak electrical interactions, mediated via these shielding polarizabilities, make major contributions to the chemical-shift nonequivalencies observed in proteins due to folding into their native conformations. The electric-field-induced shifts may be very large (≈5 ppm for <sup>13</sup>C, ≈10 ppm for <sup>17</sup>O and <sup>17</sup>F), due to the low dielectric constants found in proteins, and in some cases they may dominate the experimentally observed spectral shifts.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 2","pages":"Pages 342-357"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90267-B","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90001360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
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