scalar coupling
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Scalar-tensor theory — Scalar tensor theories are theories that include a scalar field as well as a tensor field to represent an interaction, especially the gravitational one. Tensor fields and field theory Modern physics tries to derive all physical theories from as… … Wikipedia
Scalar field theory — In theoretical physics, scalar field theory can refer to a classical or quantum theory of scalar fields. A field which is invariant under any Lorentz transformation is called a scalar , in contrast to a vector or tensor field. The quanta of the… … Wikipedia
Scalar meson — In high energy physics, a scalar meson is a meson with total spin 0 and even parity (usually noted as JP =0+). Compare to pseudoscalar meson.These mesons are most often observed in proton antiproton annihilation, radiative decays of vector mesons … Wikipedia
Coupling constant — For the Murray von Neumann coupling constant, see von Neumann algebra. For the coupling constant in NMR spectroscopy, see NMR spectroscopy and/or Proton NMR. In physics, a coupling constant, usually denoted g, is a number that determines the… … 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
NMR spectroscopy — Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy, is the name given to a technique which exploits the magnetic properties of certain nuclei. This phenomenon and its origins are detailed in a separate section on… … Wikipedia
Nuclear magnetic resonance spectroscopy — A 900MHz NMR instrument with a 21.2 T magnet at HWB NMR, Birmingham, UK Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy, is a research technique that exploits the magnetic properties of certain atomic nuclei… … Wikipedia
Proton NMR — (also Hydrogen 1 NMR, or 1HNMR) is the application of nuclear magnetic resonance in NMR spectroscopy with respect to hydrogen nuclei within the molecules of a substance, in order to determine the structure of its molecules.Simple NMR spectra are… … Wikipedia
Solid-state nuclear magnetic resonance — (NMR) spectroscopy, characterized by the presence of anisotropic (directionally dependent) interactions.IntroductionBasic conceptsA spin interacts with a magnetic or an electric field. Spatial proximity and/or a chemical bond between two atoms… … Wikipedia
Infrared spectroscopy — (IR spectroscopy) is the subset of spectroscopy that deals with the infrared region of the electromagnetic spectrum. It covers a range of techniques, the most common being a form of absorption spectroscopy. As with all spectroscopic techniques,… … Wikipedia
Alpha helix — A common motif in the secondary structure of proteins, the alpha helix (α helix) is a right handed coiled conformation, resembling a spring, in which every backbone N H group donates a hydrogen bond to the backbone C=O group of the amino acid… … Wikipedia
