首页   按字顺浏览 期刊浏览 卷期浏览 NMR Microscopy—Fundamentals, Limits and Possible Applications
NMR Microscopy—Fundamentals, Limits and Possible Applications

 

作者: Winfried Kuhn,  

 

期刊: Angewandte Chemie International Edition in English  (WILEY Available online 1990)
卷期: Volume 29, issue 1  

页码: 1-19

 

ISSN:0570-0833

 

年代: 1990

 

DOI:10.1002/anie.199000013

 

出版商: Hüthig&Wepf Verlag

 

关键词: NMR microscopy;Materials science;Analytical methods;NMR spectroscopy

 

数据来源: WILEY

 

摘要:

AbstractAlongside the numerous applications of NMR spectroscopy to structural elucidation in analytical chemistry, and to biochemical and morphological studies by NMR tomography, NMR microscopy makes possible a whole new range of applications. These include imaging, the investigation of biological objects such as plants and small animals, and also the observation of microscopic structures and structural changes in polymers and ceramics. NMR spectroscopy can also be conducted combinationally as volume‐selective spectroscopy, whereby it is possible to spatially resolve the NMR‐specific parameters: spin density ϱ, chemical shifts δ, and the relaxation timesT1andT2. The numerous well developed methods available make it possible to study dynamic processes by fast imaging with a temporal resolution in milliseconds. This not only allows the imaging of moving objects without incurring movement artefacts but also the measurement of diffusion constants in isotropic and anisotropic diffusion—in the latter case allowing, in principle, the determination of the complete diffusion tensor. The spatially resolved measurement of the relaxation times yields information on molecular mobility and bonding, e. g. the bonding of water, or other solvents, to polymers, the mobility of fluids in polymers or ceramics, or the three‐dimensional evaluation of pore size in porous materials. In biomedicine, NMR microscopy allows the observation of growth on the cellular level, the study of embryos, and the development of therapeutic methods in animal experiments. It can lead to a drastic reduction in the number of animal experiments, and in combination with volume‐selective spectroscopy gives valuable information on in‐vi

 

点击下载:  PDF (10993KB)



返 回