Results 211 to 220 of about 125,569 (260)
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Nuclear magnetic resonance (NMR) studies of homeopathic solutions
British Homeopathic Journal, 2001AbstractThe efficacy of homeopathy is controversial. Nuclear magnetic resonance (NMR) has been used to study homeopathic solutions, showing provocative results. We examined the reproducibility of one of the allegedly positive studies. 1H NMR spectra were recorded for Sulphur D4, diluted and succussed up to D30 (called potentization) at two ...
S, Aabel, S, Fossheim, F, Rise
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Nuclear Magnetic Resonance (NMR) II. Imaging in Dementia
British Journal of Psychiatry, 1985SummaryProton NMR imaging of the brain is rapidly becoming established as a useful investigative tool in medicine. This paper examines the usefulness of the NMR parameters—spin-lattice relaxation time (T1) and proton density (PD)—in differentiating groups of patients with senile dementia of Alzheimer type (SDAT) and multi-infarct dementia (MID) from ...
J A, Besson +5 more
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Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR)
1979The pattern of obtaining NMR spectra (Fig. 60) is analogous tor the EPR patten, but with differences conditioned by the nature of the electron and nucleus spin moments, and by the value of the electron and nuclear magnetic moments. The energy levels between which the transition is accomplished (Fig. 61).
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Nuclear Magnetic Resonance (NMR) Tomography of the Normal Abdomen
Journal of Computer Assisted Tomography, 1981Abstract:A series of axial transverse and sagittal nuclear magnetic resonance scans through the abdomen are presented demonstrating both solid viscera and blood vessels. The anatomical substrate of the section is explained, and the potential application of these preliminary results in clinical ...
R C, Hawkes +4 more
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Introduction to Nuclear Magnetic Resonance — NMR
1986This chapter presents an overview of the NMR experiment and the chemical information which it can provide; it will not be essential reading for those who have previously met the basics of the technique, but for others it will supply a perspective which would be lacking if the beginnings were treated too rigorously.
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Nuclear magnetic resonance (NMR) spectroscopy
1994NMR is a spectroscopic technique that uses radiation in the radio frequency region of the electromagnetic spectrum. Its use in the analysis of surfactants can be broken down into three main categories: 1. Determination of molecular structure, e.g. characterising unknowns in raw materials, or unexpected by-products. 2.
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Nuclear Magnetic Resonance (NMR) Spectrometry
2002All nuclei whose mass number is not divisible by 4 have a nuclear magnetic spin (NMS) moment. The magnitude of this moment depends on the kind of nucleus. If a chemical system containing equal nuclei with an NMS is brought into a strong magnetic field, then the direction of these moments is (at least partially) aligned.
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Nuclear magnetic resonance (NMR) spectroscopy
2006A brief description is presented of the standard protocol for NMR structure determination of proteins and nucleic acids in solution. The main focus is then on comparisons of corresponding information that can be obtained by X-ray crystallography and by solution NMR spectroscopy. In particular, these comparisons cover information on internal mobility of
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Nuclear Magnetic Resonance (NMR) Principles
2000The discovery of nuclear magnetic resonance (NMR), by Purcell1 and Block,2 first revolutionized analytical chemistry, then medical imaging. As illustrated in Figure 3.1 NMR imaging has taken us to yet another dimension of diagnostic imaging in which superior contrast resolution, multi-planar capabilities, imaging of physiologic processes such as blood ...
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