chemical shift


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chemical shift

[′kem·i·kəl ′shift]
(physical chemistry)
Shift in a nuclear magnetic-resonance spectrum resulting from diamagnetic shielding of the nuclei by the surrounding electrons.
References in periodicals archive ?
Table-1: 1H-NMR chemical shift (400 MHz, CDCl3) of compound 1.
36-38) The residues only in the catalytic domain (Tyr-148, 199, 238, 307, and 341, and His-173, 179, 200, and 324) revealed chemical shift changes on AMPPNP/ATP binding.
Chemical shift and diffusion-weighted magnetic resonance imaging of the anterior mediastinum in oncology: current clinical applications in qualitative and quantitative assessment.
Chemical shift imaging (CSI) is the mainstay of MR evaluation of solid adrenal lesions.
More significant changes in terms of drift to higher chemical shift values were observed for the enamel samples than for HAP is related to the presence of specific surface layer in enamel which is slightly different from the stoichiometric apatite and is rich with other minor additives from ionic substitutions.
The chemical shift at 181 ppm was assigned to the carbonyl group in the quinone structure; it came from the oxidation of phenolic hydroxyl groups.
Among their topics are the xenon chemical shift and chemical shift anisotropy, principles and practices of spin-exchange optical pumping at high xenon densities and laser fluxes, biosensing and the study of biological cells using hyperpolarized 129xenon, continuous flow and dissolved phase 129xenon nuclear magnetic resonance/magnetic resonance imaging for quantifying in preclinical study as well as materials science, and hyperpolarized xenon nuclear magnetic resonance/magnetic resonance imaging signal amplification by gas extraction and remote detection.
However, Cornelis and colleagues (3) have explored the possibility that absence of central area signal inversion or the presence of a signal drop on chemical shift MRI may assist in ruling out oncocytomas.
64 were reasonably assigned to galactosyl carbons attached at the 3A3/4-hydroxyl group of solasodine by comparison with the chemical shift values of galactosyl carbons of solasonineand solalyratine A and solalyratine B.
The 13C NMR information plays important role in support of the structural characterization of the complexes especially by showing the significant change in chemical shift values of complexes relative to ligand molecule.