A simple and fast method is introduced which eliminates the effects of a distribution of chemical shifts in NMR imaging. When the gradient-induced shift is not much larger than the distribution of chemical shifts, distortions are observed which smear the image and degrade the resolution. To ...
19F NMR, Applications, Solution State Claudio Pettinari, Giovanni Rafaiani, in Encyclopedia of Spectroscopy and Spectrometry, 1999 Chemical shift Fluorine chemical shifts cover a very large range (more than 1300 ppm, about two orders greater than 1H chemical shift) when organic, inorganic, and organ...
chemical shift化学位移核磁共振氢谱-回复 Chemical shift, also known as the nuclear magnetic resonance (NMR) proton spectrum, is a fundamental technique used in chemistry to determine the chemical environment of hydrogen atoms in a molecule. In this article, we willexplore the concept of chemical ...
Recoupling of chemical shift anisotropies in solid-state NMR under high-speed magic-angle spinning and in uniformly 13C-labeled systems We demonstrate the possibility of recoupling chemical shift anisotropy (CSA) interactions in solid-state nuclear magnetic resonance (NMR) under high-speed ... JCC...
Spatial mapping of the chemical shift in NMR In many biological systems, nuclear magnetic resonance chemical-shift studies of 31P, 13C, and 1H can be of great value as a means of studying metabolic pr... P Mansfield - 《Magnetic Resonance in Medicine》 被引量: 954发表: 1984年 1 H NMR...
The results indicate that the higher the polymerization or condensation of silicate tetrahedra the higher the IR wave number and the lower the NMR chemical shift value.doi:10.1007/978-3-642-80432-8_4Yoshihiko OkadaTsuguya MasudaMinori Takada...
专利名称：CHEMICAL SHIFT VALUE DISPLAY SYSTEM FOR NMR SPECTRUM 发明人：OTSU SHINICHI,SUZUKI HAJIME 申请号：JP26323287 申请日：19871019 公开号：JPH01105149A 公开日：19890421 专利内容由知识产权出版社提供 摘要：PURPOSE:To perform processing operation efficiency by searching spectrum data for the peak of a...
Chemical Shifts The variation of the resonance frequency of a nucleus in nuclear magnetic resonance (NMR) spectroscopy in consequence of its magnetic environment. through absorption arising from shielding and deshielding by electrons, value is ppm. The chemical shift of a nucleus, δ, is expressed ...
of isotopes, chemical shift anisotropy and quadrupolar interactions, Pake patterns, spin echoes, slice selection in NMR imaging, and a complete new chapter ... Malcolm H Levitt,John Wiley - Wiley John + Sons 被引量: 841发表: 2008年 Method for enhancing NMR imaging; and diagnostic use An imp...
Chemical shifts obtained from NMR experiments are an important tool in determining secondary, even tertiary, protein structure. The main repository for chemical shift data is the BioMagResBank, which provides NMR-STAR files with this type of information.