dipole-dipole coupling

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• Magnetic dipole-dipole interaction — Magnetic dipole dipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. The energy of the interaction is as follows:: old{H} = frac{ mu 0 } {4 pi r {jk}^3 } left( 3 (old{m} j cdot old{e} …   Wikipedia

• J-coupling — (also called indirect dipole dipole coupling ) is the coupling between two nuclear spins due to the influence of bonding electrons on the magnetic field running between the two nuclei. J coupling contains information about dihedral angles which… …   Wikipedia

• Magnetic dipole–dipole interaction — Magnetic dipole–dipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles. The potential energy of the interaction is as follows: where ejk is a unit vector parallel to the line joining the… …   Wikipedia

• Residual dipolar coupling — The residual dipolar coupling between two spins in a molecule occurs if the molecules in solution exhibit a partial alignment leading to an incomplete averaging of spatially anisotropic dipolar couplings.Partial molecular alignment leads to an… …   Wikipedia

• Transition dipole moment — The Transition dipole moment or Transition moment, usually denoted scriptstyle{mathbf{d} {nm for a transition between an initial state, scriptstyle{m}, and a final state, scriptstyle{n}, is the electric dipole moment associated with the… …   Wikipedia

• Magnetic dipole transition — The interaction of an electromagnetic wave with an electron bound in an atom or molecule can be described by time dependent perturbation theory. Magnetic dipole transitions describe the dominant effect of the coupling to the magnetic part of the… …   Wikipedia

• Rovibrational coupling — is a coupled rotational and vibrational excitation of a molecule. It is different from rovibronic coupling, which involves a change in all of electronic, vibrational, and rotational states simultaneously.Rotational Vibrational… …   Wikipedia

• Davydov soliton — Side view of an α helix of alanine residues in atomic detail. Protein α helices provide substrate for Davydov soliton creation and propagation. Davydov soliton is a quantum quasiparticle representing an excitation propagating along the protein α… …   Wikipedia

• Förster resonance energy transfer — (abbreviated FRET), also known as Fluoresence resonance energy transfer or resonance energy transfer (RET), describes an energy transfer mechanism between two chromophores. A donor chromophore in its excited state can transfer energy by a… …   Wikipedia

• Transverse relaxation optimized spectroscopy — (TROSY) is an experiment in protein NMR spectroscopy that allows studies of large molecules or complexes.The application of NMR to large molecules is normally limited by the fact that the line widths generally increase with molecular mass. Larger …   Wikipedia

• Nuclear magnetic resonance spectroscopy of proteins — (usually abbreviated protein NMR) is a field of structural biology in which NMR spectroscopy is used to obtain information about the structure and dynamics of proteins. The field was pioneered by Richard R. Ernst and Kurt Wüthrich[1], among… …   Wikipedia