Nuclear magnetic resonance spectros

B-75M15I900 F. A. L. Anet and R. Anet in Dynamic Nuclear Magnetic Resonance Spectro-... 

E. L. Muetterties and J. P. Jesson in Dynamic Nuclear Magnetic Resonance Spectros-... 

Sattler M, Schleucher J, Griesinger C. Heteronuclear multidimensional NMR experiments for the structure determination of proteins in solution employing pulsed field gradients. Progress Nuclear Magnet. Reson. Spectros. 1999 34 93-158. 

JW Emsley, J Feeney, LH Sutcliffe. High Resolution Nuclear Magnetic Resonance Spectro.scopy. Oxford Pergamon Press, 1965, pp 60-111. 

I. Nuclear magnetic resonance spectro.scopy. 2. Inorganic compounds—Analysis. I. Smith, Mark E. II. Title. 111. Series... 

Gas chromatography is often coupled with the selective techniques of spectroscopy and electrochemistry. We have discussed GC/MS, but gas chromatography can also be combined with several other techniques, such as infrared spectroscopy and nuclear magnetic resonance spectro.scopy, to provide the chemist with powerful tools for identifying the components of complex mixtures. These combined techniques are sometimes called hyphenated methods. ... 

W. E. Smith (1972) unpxiblished results quoted in G. C. Levy and G. L. Nelson, Carbon-13 Nuclear Magnetic Resonance SpectrO" scopy for Organic Chemists, Wiley-Interscience. New York, p. 84. 

Schmidt, H. L. (1986). Food quality control and studies on human nutrition by mass spectro-metric and nuclear magnetic resonance isotope ratio determination. Fresenius Z. Anal. Chem. 324, 760-766. 

T. W. M. Fan, A. N. Lane, D. Crowley, and R. M. Higa.shi, Comprehensive analysis of organic ligands in whole root exudates using nuclear magnetic resonance and gas chromatography-mass spectro.scopy. Anal. Biochem. 257 57 (1997). 

The exact chemical composition of a plant extract is not always completely known. Many articles published in recent years attempt to identify the compounds structure by coupling chromatography with spectro-metric methods. Modern densitometers are able to record the in situ ultraviolet-visible (UV-vis) spectra of a separated substance on a TLC plate [6]. Thin-layer chromatography can be also coupled with other methods in order to enhance the identification of compounds, such as mass spectrometry (MS) or nuclear magnetic resonance (NMR). There are devices able to record the in situ spectra on the TLC plate, or the separated substance is removed from the plate together with the layer, then extracted in a small volume of an adequate solvent, and the sample can be used for obtaining the spectra [6,7]. 

K. Choi and D. W. Tedder. 1995. Nuclear magnetic resonances of TBP-diluent mixtures. Spectro-chimica Acta part A 51 2301-2305. 

Wolfender, J.-L. Ndjoko, K. Hostettmann, K. Liquid chromatography with ultraviolet absorbance-mass spectro-metric detection and with nuclear magnetic resonance spectrometry A powerful combination for the on-hne structural investigation of plant metaholites. J. Chromatogr. A, 2003,1000 (1-2), 437 55. 

From the work of Hammett and of Taft have come various substituent and reaction parameters of great value for summarizing and understanding the influence of molecular structure on chemical reactivity. The substituent constants have also found application in fields which are very different from rates and equilibria of organic reactions optical spectro.scopy, nuclear magnetic resonance spectroscopy, and the mass spectrometry of organic compounds. There will be some discussion of these areas in this article. 

FLZ fluconazole CD cyclodextrin P-CD P-cyclodextrin IH NMR proton Nucleic Magnetic Resonance spectroscopy 2D two dimensional COSY correlation SpectroscopY ROESY Rotating frame Overhauser Effect Spectros-copY NOE Nuclear Overhauser Effect [FI] host [Gj guest MOE Molecular Operating Environment. 

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