Topic
Resonance
About: Resonance is a research topic. Over the lifetime, 44602 publications have been published within this topic receiving 711521 citations. The topic is also known as: Resonance.
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01 Jan 1989
TL;DR: This chapter discusses enzyme modifications for Nuclear Magnetic Resonance Studies, which resulted in the determination of Three-Dimensional Protein Structures in Solution by Nuclear magnetic Resonance: An Overview, and the heuristic Refinement Method for Determination of Solution Structure of Proteins from Nuclear Magnetic resonance data.
Abstract: Enzyme Modifications for Nuclear Magnetic Resonance Studies: J.T. Gerig, Fluorine Nuclear Magnetic Resonance of Fluorinated Ligands. D.M. LeMaster, Deuteration in Protein-Proton Magnetic Resonance. D.C. Muchmore, L.P. McIntosh, C.B. Russell, D.E. Anderson, and F.W. Dahlquist, Expression and Nitrogen-15 Labeling of Proteins for Proton and Nitrogen-15 Nuclear Magnetic Resonance. D.W. Hibler, L. Harpold, M. Dell'Acqua, T. Pourmotabbed, J.A. Gerlt, J.A. Wilde, and P.H. Bolton, Isotopic Labeling with Hydrogen-2 and Carbon-13 to Compare Conformations of Proteins and Mutants Generated by Site-Directed Mutagenesis, I. P.A. Kosen, Spin Labeling of Proteins. Protein Structure: K. W*aduthrich, Determination of Three-Dimensional Protein Structures in Solution by Nuclear Magnetic Resonance: An Overview. V.J. Basus, Proton Nuclear Magnetic Resonance Assignments. M. Billeter, Computer-Assisted Resonance Assignments. I.D. Kuntz, J.F. Thomason, and C.M. Oshiro, Distance Geometry. R.M. Scheek, W.F. van Gunsteren, and R. Kaptein, Molecular Dynamics Simulation Techniques for Determination of Molecular Structures from Nuclear Magnetic Resonance Data. R.B. Altman and O. Jardetzky, Heuristic Refinement Method for Determination of Solution Structure of Proteins from Nuclear Magnetic Resonance Data. I. Bertini, L. Banci, and C. Luchinat, Proton Magnetic Resonance of Paramagnetic Metalloproteins. H.J. Vogel, Phosphorus-31 Nuclear Magnetic Resonance of Phosphoproteins. J.A. Wilde, P.H. Bolton, D.W. Hibler, L. Harpold, T. Pourmotabbed, M. Dell'Acqua, and J.A. Gerlt, Isotopic Labeling with Hydrogen-2 and Carbon-13 to Compare Conformations of Proteins and Mutants Generated by Site-Directed Mutagenesis, II. Enzyme Mechanisms: D.G. Gorenstein and C.B. Post, Phosphorus-31 Nuclear Magnetic Resonance of Enzyme Complexes: Bound Ligand Structure, Dynamics, and Environment. C.R. Sanders II and M.-D. Tsai, Ligand*b1Protein Interactions via Nuclear Magnetic Resonance of Quadrupolar Nuclei. P.R. Rosevear and A.S. Mildvan, Ligand Conformations and Ligand*b1Enzyme Interactions as Studied by Nuclear Overhauser Effect. B.D. Nageswara Rao, Determination of Equilibrium Constants of Enzyme-Bound Reactants and Products by Nuclear Magnetic Resonance. J.M. Risley and R.L. Van Etten, Mechanistic Studies Utilizing Oxygen-18 Analyzed by Carbon-13 and Nitrogen-15 Nuclear Magnetic Resonance Spectroscopy. J.J. Villafranca, Positional Isotope Exchange Using Phosphorus-31 Nuclear Magnetic Resonance. J.J. Villafranca, Paramagnetic Probes of Macromolecules. In Vivo Studies of Enzymatic Material: S.M. Cohen, Enzyme Regulation of Metabolic Flux. J.S. Cohen, R.C. Lyon, and P.F. Daly, Monitoring Intracellular Metabolism by Nuclear Magnetic Resonance. Appendix: Computer Programs Related to Nuclear Magnetic Resonance: Availability, Summaries, and Critiques. Each chapter includes references. Author Index. Subject Index.
1,085 citations
TL;DR: It is reported that a resonance response with a very high quality factor can be achieved in a planar metamaterial by introducing symmetry breaking in the shape of its structural elements, which enables excitation of trapped modes, i.e., modes that are weakly coupled to free space.
Abstract: We report that a resonance response with a very high quality factor can be achieved in a planar metamaterial by introducing symmetry breaking in the shape of its structural elements, which enables excitation of trapped modes, i.e., modes that are weakly coupled to free space.
1,066 citations
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TL;DR: It is experimentally demonstrated for the first time that spherical silicon nanoparticles have strong magnetic dipole resonance, which can be continuously tuned throughout the whole visible spectrum varying particle size and visually observed by means of dark-field optical microscopy.
Abstract: Spherical silicon nanoparticles with sizes of a few hundreds of nanometers represent a unique optical system According to theoretical predictions based on Mie theory they can exhibit strong magnetic resonances in the visible spectral range The basic mechanism of excitation of such modes inside the nanoparticles is very similar to that of split-ring resonators, but with one important difference that silicon nanoparticles have much smaller losses and are able to shift the magnetic resonance wavelength down to visible frequencies We experimentally demonstrate for the first time that these nanoparticles have strong magnetic dipole resonance, which can be continuously tuned throughout the whole visible spectrum varying particle size and visually observed by means of dark-field optical microscopy These optical systems open up new perspectives for fabrication of low-loss optical metamaterials and nanophotonic devices
1,011 citations
TL;DR: In this paper, a theory of the Auger transition is presented in which the form of the distribution in energy and relative total yield of ejected electrons are derived, and the effects of variation of atomic energy levels near the metal surface and the Heisenberg uncertainty principle makes it possible to account in detail for the experimentally observed energy distributions as well as the variation of these and of ion kinetic energy.
Abstract: Electrons ejected from atomically clean metals by slow ions of the noble gases arise in Auger transitions which involve either the direct neutralization of the ion or the de-excitation of an excited atom. A theory of these processes is presented in which the form of the distribution in energy and relative total yield, ${\ensuremath{\gamma}}_{i}$, of ejected electrons are derived. Matrix elements are not evaluated from first principles, but specific use of experimental results at two points in the theory leads to a determination of the dependence of the matrix element on distance between the atomic particle and the metal surface and the angle between the excited electron's velocity and the surface normal. Inclusion of the effects of variation of atomic energy levels near the metal surface and the Heisenberg uncertainty principle makes it possible to account in some detail for the experimentally observed energy distributions as well as the variation of these and of ${\ensuremath{\gamma}}_{i}$ with ion kinetic energy. The effect upon the resonance ionization and neutralization processes of the variation of atomic energy levels near the metal surface has also been investigated. The theory predicts a critical distance from the metal surface outside which resonance neutralization and inside which resonance ionization are possible. It has also been possible for the specific case of noble gas ions on tungsten, used as an illustrative example, to determine the relative proportion of electrons ejected by each of the possible Auger processes, to estimate ${\ensuremath{\gamma}}_{i}$ values for ions incident upon a metal with thermal energies, and to fix limits on the width of the filled portion of the conduction band in the metal. The role of the state density function in the metal and the effect of possible variation of the matrix element with electron energy in the band are also investigated.
945 citations
TL;DR: Due to high permittivity, the magnetic dipole resonance is observed in the visible spectral range for Si nanoparticles with diameters of ∼200 nm, thereby opening a way to the realization of isotropic optical metamaterials with strong magnetic responses in thevisible region.
Abstract: Strong resonant light scattering by individual spherical Si nanoparticles is experimentally demonstrated, revealing pronounced resonances associated with the excitation of magnetic and electric modes in these nanoparticles. It is shown that the low-frequency resonance corresponds to the magnetic dipole excitation. Due to high permittivity, the magnetic dipole resonance is observed in the visible spectral range for Si nanoparticles with diameters of ∼200 nm, thereby opening a way to the realization of isotropic optical metamaterials with strong magnetic responses in the visible region.
932 citations