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Journal of Magnetic Resonance (1969)最新文献

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Stepwise propagation of coherence along a chain of atoms: DAISY-2 相干性沿原子链的逐步传播:DAISY-2
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-15 DOI: 10.1016/0022-2364(92)90380-P
Ēriks Kupče , Ray Freeman
{"title":"Stepwise propagation of coherence along a chain of atoms: DAISY-2","authors":"Ēriks Kupče , Ray Freeman","doi":"10.1016/0022-2364(92)90380-P","DOIUrl":"10.1016/0022-2364(92)90380-P","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"100 1","pages":"Pages 208-214"},"PeriodicalIF":0.0,"publicationDate":"1992-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90380-P","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83379358","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: 15
Accessible states in Liouville space. A two-dimensional extension of the universal bound on spin dynamics applied to polarization transfer in INSM Spin-12 systems 刘维尔空间中的无障碍状态。应用于INSM-spin-12系统极化转移的自旋动力学普遍界的二维扩展
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90202-I
Niels Chr Nielsen , Ole W Sørensen
{"title":"Accessible states in Liouville space. A two-dimensional extension of the universal bound on spin dynamics applied to polarization transfer in INSM Spin-12 systems","authors":"Niels Chr Nielsen ,&nbsp;Ole W Sørensen","doi":"10.1016/0022-2364(92)90202-I","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90202-I","url":null,"abstract":"<div><p>The universal bound on spin dynamics is extended to two dimensions to describe which and how states in a two-dimensional Liouville subspace can be accessed by unitary transformations. The transfer of I-spin Zeeman order into S-spin Zeeman order for heteronuclear I<sub><em>N</em></sub>S<sub><em>M</em></sub> spin-<span><math><mtext>1</mtext><mtext>2</mtext></math></span> systems with <em>N</em> + <em>M</em> ⩽ 13 spins is analyzed in detail. These I<sub><em>N</em></sub>S<sub><em>M</em></sub> 2D bounds converge to the entropy bounds for spin systems with infinite numbers of I and S spin species but deviate significantly for finite numbers of spins.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 449-465"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90202-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72241699","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: 10
Three-dimensional NMR experiments for the separation of side-chain correlations in proteins via the carbonyl chemical shift 通过羰基化学位移分离蛋白质侧链相关性的三维核磁共振实验
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90223-T
Lewis E Kay , Mitsuhiko Ikura , A.A Grey , D.R Muhandiram
{"title":"Three-dimensional NMR experiments for the separation of side-chain correlations in proteins via the carbonyl chemical shift","authors":"Lewis E Kay ,&nbsp;Mitsuhiko Ikura ,&nbsp;A.A Grey ,&nbsp;D.R Muhandiram","doi":"10.1016/0022-2364(92)90223-T","DOIUrl":"10.1016/0022-2364(92)90223-T","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 652-659"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90223-T","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88497066","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: 13
Transient decay of longitudinal magnetization in heterogeneous spin systems under selective saturation 选择性饱和条件下非均匀自旋系统纵向磁化强度的瞬态衰减
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90203-J
Hong N Yeung, Scott D Swanson
{"title":"Transient decay of longitudinal magnetization in heterogeneous spin systems under selective saturation","authors":"Hong N Yeung,&nbsp;Scott D Swanson","doi":"10.1016/0022-2364(92)90203-J","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90203-J","url":null,"abstract":"<div><p>The transient behavior of the longitudinal magnetization of the mobile protons in aqueous heterogeneous materials is investigated both theoretically and experimentally when selective saturation is applied by off resonance, RF irradiation to the homogeneously broadened, immobile protons which are coupled to the mobile protons through cross relaxation. Analytical solution of this problem is obtained by a generalization of H. C. Torrey's solution to the Bloch equations. Progressive (but indirect) saturation of the magnetization of the mobile protons under this RF irradiation is dynamically monitored using very-small-tip-angle sampling pulses. The apparent relaxation rate of heat-denatured egg albumin was measured as a function of frequency offset of the saturating RF with different amplitudes using a new dispersion method modified from a broadband technique recently invented for the rapid acquisition of a cross-relaxation <em>z</em> spectrum.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 466-479"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90203-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72241681","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: 46
A fast method for obtaining a “continuous” sample of the inversion-recovery curve using spatially swept adiabatic inversion 一种利用空间扫描绝热反演获得反演恢复曲线“连续”样本的快速方法
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90213-Q
James G Pipe
{"title":"A fast method for obtaining a “continuous” sample of the inversion-recovery curve using spatially swept adiabatic inversion","authors":"James G Pipe","doi":"10.1016/0022-2364(92)90213-Q","DOIUrl":"10.1016/0022-2364(92)90213-Q","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 582-589"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90213-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79455603","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: 5
Stochastic spectroscopic imaging 随机光谱成像
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90207-N
J Jansen, B Blümich
{"title":"Stochastic spectroscopic imaging","authors":"J Jansen,&nbsp;B Blümich","doi":"10.1016/0022-2364(92)90207-N","DOIUrl":"10.1016/0022-2364(92)90207-N","url":null,"abstract":"<div><p>Noise excitation in imaging provides a significant RF power advantage over pulse excitation. Therefore it is of particular interest for the imaging of large objects in biomedicine and materials science. The theory of stochastic back-projection imaging with constant gradients is described, details of the experimental procedures are given, and results on small phantoms with and without spectroscopic resolution are presented. For imaging with RF coils of 3 cm in diameter, the excitation power was 0.1 W, corresponding to a reduction in RF power by a factor of 10<sup>3</sup> in comparison with 90° pulse excitation.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 525-532"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90207-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80640576","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: 7
Binomial filters 二项过滤器
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90222-S
Eriks Kupče , Ray Freeman
{"title":"Binomial filters","authors":"Eriks Kupče ,&nbsp;Ray Freeman","doi":"10.1016/0022-2364(92)90222-S","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90222-S","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 644-651"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90222-S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136548827","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
A sampling-ring saturation pulse for two-dimensional NMR selective excitation 二维核磁共振选择激励的采样环饱和脉冲
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90219-W
Christopher J Hardy, Edward J Meters
{"title":"A sampling-ring saturation pulse for two-dimensional NMR selective excitation","authors":"Christopher J Hardy,&nbsp;Edward J Meters","doi":"10.1016/0022-2364(92)90219-W","DOIUrl":"10.1016/0022-2364(92)90219-W","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 623-631"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90219-W","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90057069","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
Spatially selective suppression of B1 inhomogeneity B1不均匀性的空间选择性抑制
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90220-2
Ralph E Hurd, Boban K John, Peter Webb, Daniel Plant
{"title":"Spatially selective suppression of B1 inhomogeneity","authors":"Ralph E Hurd,&nbsp;Boban K John,&nbsp;Peter Webb,&nbsp;Daniel Plant","doi":"10.1016/0022-2364(92)90220-2","DOIUrl":"10.1016/0022-2364(92)90220-2","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 632-637"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90220-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91148978","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
Contents of volume 99 第99卷内容
Journal of Magnetic Resonance (1969) Pub Date : 1992-10-01 DOI: 10.1016/0022-2364(92)90231-U
{"title":"Contents of volume 99","authors":"","doi":"10.1016/0022-2364(92)90231-U","DOIUrl":"https://doi.org/10.1016/0022-2364(92)90231-U","url":null,"abstract":"","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages iii-viii"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90231-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72241700","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
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