By A. J. Shaka, Ray Freeman (auth.), Neri Niccolai, Gianni Valensin (eds.)
The moment quantity of the sequence on inorganic biochemistry and bio physics is singularly dedicated to magnetic resonance on platforms of excessive molecular complexity. lately, there were vital advances in magnetic resonance reports of polymers; those advances contact on all points of magnetic resonance, either theoretical and utilized. specific emphasis is put right here on multipulse experiments. We think such an document might be of substantial curiosity to the readers of our sequence because of the significance of magnetic resonance recommendations within the research of biopolymers. Ivano Bertini Harry grey sequence Editors Preface This publication is a list of the complaints of the foreign Symposium on "Advanced Magnetic Resonance recommendations in platforms of excessive Molecular Complexity", which was once held in Siena among 15 and 18 could 1985. the belief of the assembly is because of Proff. N.M. Atherton, G. Giacometti and E. Tiezzi with the purpose of honouring the clinical character of Prof. S.I. Weissman. The assembly has been geared up with the help of a countrywide Committee shaped via R. Basosi, I. Bertini, P. Bucci, C. Corvaia, A. Gamba, G. Martini, G.F. Pedulli, P.A. Temussi, and C.A. Veracini. The invited academics answered enthusiastically and a finished photograph of the theoretical and sensible points of magnetic resonance can be as a result supplied. The ebook includes all of the plenary lectures introduced throughout the assembly and in addition a big variety one of the large volume of contributions accumulated via the organizers.
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Several investigators have indicated that solute-solvent and solute-solute interactions are responsible for the modifications as well as the stabilization of the solute conformation (1,2) and that intra- and intermolecular hydrogen bonding is the principal route through which these interactions take place (3,4). It is well recognized that carboxyl and carbonyl groups are strongly involved in dimerization and binding processes (5-9). As previous studies have shown (10-11), 17 0 NMR is a very sensitive probe in assessing hy- drogen bonding effects, thus the present study has focused on the carboxyl group of glycine, alanine and proline and also on the carbonyl oxygens of TRH, in order to probe the hydration state of these groups as well as the effect of intra- and intermolecular hydrogen bonding on the 54 conformation of these molecules.
They describe their experiment in terms of isotropic mixing, a technique first introduced in solid state NMR by Weitekamp, Garbow and Pines (9) and also used by Caravatti et al. (10). We describe new methods that rely on similar principles but that are experimentally easier to execu- te since they appear less sensitive to instrument imperfections. experiments are most conveniently analysed by considering them Our as homonuclear Hartmann-Hahn (HOHAHA) coherence transfer methods. It was first demonstrated by Hartmann and Hahn (11) that net magneti- zation transfer between heteronuclear coupled spins occurs when one simultaneously switches on two coherent rf fields for spins I and spins S in such a way that (1 ) 23 often referred to as the Hartmann-Hahn match condition.
59, 569" (1973). Phys. 38, 963 (1979). Phys. 74, 127 (1981) and references therein. Bernstein, "High Resolution Nuclear Magnetic Resonance", McGraw-Hill, New York, 1959. Reson. 48, 286 (1982) . , in press. Reson. 62, 346 (1985). Soc. 106, 811 (1984). Reson. 63, 207 (1985). Soc. 107, 2821 (1985). Reson. 49, 322 (1982). Reson. 56, 149 (1984). Reson. submitted for publication. Phys. 43, 3414 (1965). Phys. 44, 1 (1966). 27) r. Solomon, Phys. Rev. Letters 2, 301 (1959). Bio1. 155, 347 (1982). Biophys.
Advanced Magnetic Resonance Techniques in Systems of High Molecular Complexity by A. J. Shaka, Ray Freeman (auth.), Neri Niccolai, Gianni Valensin (eds.)