Nuclear magnetic resonance spectroscop carbohydrates

Duus J0, Gotfredsen CH, Bock K (2000) Carbohydrate Structural Determination by NMR Spectroscopy Modem Methods and Limitations. Chem Rev 100 4589 Agrawal PK, Pathak AK (1996) Nuclear Magnetic Resonance Spectroscopic Approaches for the Determination of friterglycosidic Linkage and Sequence in Oligosaccharides. Phytochem Anal 7 113... 

Structural investigations into the degree of branching and into the position and nature of glycosidic bonds and of non-carbohydrate residues in polysaccharides may include periodate oxidation and other procedures such as exhaustive methylation. X-ray diffraction and spectroscopic techniques such as nuclear magnetic resonance and optical rotatory dispersion also give valuable information especially relating to the three-dimensional structures of these polymers. 

Current subject areas covered are Amino Acids, Peptides and Proteins, Carbohydrate Chemistry, Catalysis, Chemical Modelling Applications and Theory, Electron Paramagnetic Resonance, Nuclear Magnetic Resonance, Organometallic Chemistry, Organophosphorus Chemistry, Photochemistry and Spectroscopic Properties of Inorganic and Organometallic Compounds. 

II Amino Acids, Peptides 8c Proteins Vol.29 Ml Carbohydrate Chemistry Vol.30 1 Electron Paramagnetic Resonance Vb/. 16 M Nuclear Magnetic Resonance Vol27 S Organometallic Chemistry Vol.26 8 Photochemistry Vb/.29 Ji Spectroscopic Properties of Inorganic and Organometallic Compounds Vol.31... 

A variety of spectroscopic techniques have been applied to DOC isolated from seawater by cross-flow ultrafiltration or adsorption onto XAD resins. The two techniques isolate very different organic fractions from seawater. Hydrophobic fractions (such as marine humic material) are isolated on XAD resins [48], whereas the organic matter extracted by ultrafiltration is retained primarily on the basis of its molecular size and shape [49], resulting in isolates rich in nitrogen and carbohydrates (polysaccharides). Nuclear magnetic resonance (NMR) spectroscopy has proven successful in distinguishing between the specific structures of XAD-bound humics and the carbohydrates concentrated into colloidal size fractions. 

Nuclear Magnetic Resonance. Considerable progress has been achieved in the NMR spectroscopic characterization of carbohydrates in the solid and solution state. C nmr has already proved to be a powerful tool for the structural elucidation of polysaccharides, providing information on their composition, sequence, overall conformation and... 

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