A World Parallel to Hydrogen Bonding
... carbon, black; hydrogen, gray; nitrogen, blue; fluorine, green; iodine, purple. Halogen bonds are dashed lines. show a supramolecular behavior quite close to their aliphatic analogues,31 and they can be easily appended to a wide diversity of organic compounds. In fact, the nucleophilic aromatic subs ...
... carbon, black; hydrogen, gray; nitrogen, blue; fluorine, green; iodine, purple. Halogen bonds are dashed lines. show a supramolecular behavior quite close to their aliphatic analogues,31 and they can be easily appended to a wide diversity of organic compounds. In fact, the nucleophilic aromatic subs ...
Physical and chemical properties of glycine sodium nitrate
... Fig. 3 (b), Fig. 3: EDX spectra of pure and 1 M% KNO3 doped GSN crystals 3.4 Fourier Transform Infrared (FTIR) analysis In order to analyze the presence of functional groups, FTIR spectra were recorded in the range of 400cm−1 to 4000cm−1 using a Perkin Elmer FTIR spectrometer by KBr pellet technique ...
... Fig. 3 (b), Fig. 3: EDX spectra of pure and 1 M% KNO3 doped GSN crystals 3.4 Fourier Transform Infrared (FTIR) analysis In order to analyze the presence of functional groups, FTIR spectra were recorded in the range of 400cm−1 to 4000cm−1 using a Perkin Elmer FTIR spectrometer by KBr pellet technique ...
Potential of Quasicrystals and Quasicrystal Approximants for New
... phase. These approximants will also be investigated for their potential as themoelectric materials since they are known to have similar electrical and thermal properties to their related quasicrystals.’ Much more research must be done and an extensive data base must be established on the electrical ...
... phase. These approximants will also be investigated for their potential as themoelectric materials since they are known to have similar electrical and thermal properties to their related quasicrystals.’ Much more research must be done and an extensive data base must be established on the electrical ...
FINITE DIFFERENCE TIME DOMAIN MODELING OF LIGHT
... to a small group velocity can be so explained [6]: since the photon undergoes many multiple reflections at the lattice discontinuities, the optical path length increases and the photon spends a long time in the lattice moving at a mean velocity equal to vg . In presence of an active medium, the incre ...
... to a small group velocity can be so explained [6]: since the photon undergoes many multiple reflections at the lattice discontinuities, the optical path length increases and the photon spends a long time in the lattice moving at a mean velocity equal to vg . In presence of an active medium, the incre ...
Matter and Minerals Chapter 2
... An isotope is an atom that exhibits variation in its mass number Some isotopes have unstable nuclei that emit particles and energy in a process known as radioactive decay ...
... An isotope is an atom that exhibits variation in its mass number Some isotopes have unstable nuclei that emit particles and energy in a process known as radioactive decay ...
THz generation by optical rectification of near
... Optical rectification of femtosecond laser pulses in an electro-optic crystal is an often used method for the generation of broadband THz pulses [1]. A high conversion efficiency in this process is crucial for both THz imaging and spectroscopy applications, because it leads to a high signal-to-noise ...
... Optical rectification of femtosecond laser pulses in an electro-optic crystal is an often used method for the generation of broadband THz pulses [1]. A high conversion efficiency in this process is crucial for both THz imaging and spectroscopy applications, because it leads to a high signal-to-noise ...
Neutrons and new materials - Institut Laue
... spacing between atomic planes, and by measuring these angles and intensities the atomic structure of the material can be deduced. If instead of a crystalline powder an amorphous or liquid sample is used, there are only broad peaks at specific angles corresponding to average interatomic distances. To ...
... spacing between atomic planes, and by measuring these angles and intensities the atomic structure of the material can be deduced. If instead of a crystalline powder an amorphous or liquid sample is used, there are only broad peaks at specific angles corresponding to average interatomic distances. To ...
Chapter 3 Igneous Textures
... This can move mineral species to form many new nuclei, with low growth, producing many aphanitic crystals. This can produce a porphyritic texture in plutonic rocks if phenocrysts were already present. ...
... This can move mineral species to form many new nuclei, with low growth, producing many aphanitic crystals. This can produce a porphyritic texture in plutonic rocks if phenocrysts were already present. ...
further experimental investigations on the dieléctric losses of quartz
... " bleaching at 550°C. Surprisingly enough, the peak at 60 OK has almost disappeared, whereas a peak at 38 OK has come into existence. This is probably a spurious effect. Peaks at 38 OK practically always occur in the synthetic clear crystals, where we find them to be the dominant ones. We shall prov ...
... " bleaching at 550°C. Surprisingly enough, the peak at 60 OK has almost disappeared, whereas a peak at 38 OK has come into existence. This is probably a spurious effect. Peaks at 38 OK practically always occur in the synthetic clear crystals, where we find them to be the dominant ones. We shall prov ...
Syntheses of Soluble, -Stacking Tetracene Derivatives π
... The molecular and crystal structures of 5a-d were determined by X-ray structure analysis on single crystals, which were obtained by solvent diffusion at low temperature. The packing diagrams of 5a-d are displayed in Figure 1. All four compounds show primarily face-face slipped π-stacking in the crys ...
... The molecular and crystal structures of 5a-d were determined by X-ray structure analysis on single crystals, which were obtained by solvent diffusion at low temperature. The packing diagrams of 5a-d are displayed in Figure 1. All four compounds show primarily face-face slipped π-stacking in the crys ...
ppt - Computer Science & Engineering
... • Nothing could be further from the truth. • The changes that occur in the structure of hemoglobin when oxygen binds to the hemes are so large that crystals of deoxygenated hemoglobin shatter when exposed to oxygen. • Further evidence for the flexibility of proteins can be obtained by noting that th ...
... • Nothing could be further from the truth. • The changes that occur in the structure of hemoglobin when oxygen binds to the hemes are so large that crystals of deoxygenated hemoglobin shatter when exposed to oxygen. • Further evidence for the flexibility of proteins can be obtained by noting that th ...
Atomic disordering in YB56 detected by high
... (HREM) using a slow-scan charge-coupled device (CCD) camera, and the `local’ structure model was proposed for yttrium atom arrangements. In addition, digital HREM images recorded along [100], [110] and [111] directions of the YB56 crystals showed `averaged’ yttrium atom arrangements inside the non-i ...
... (HREM) using a slow-scan charge-coupled device (CCD) camera, and the `local’ structure model was proposed for yttrium atom arrangements. In addition, digital HREM images recorded along [100], [110] and [111] directions of the YB56 crystals showed `averaged’ yttrium atom arrangements inside the non-i ...
Crystal Form
... Crystal Form: orderly arrangement of atoms in a crystal (what a crystal looks like is its arrangement) ...
... Crystal Form: orderly arrangement of atoms in a crystal (what a crystal looks like is its arrangement) ...
EBSD: Current state, prospects and comparison with XRD
... stands for the electron wavelength, and n is the order of reflection. Because of the short wavelength at usual accelerating voltages, U, in the SEM the slightly curved band edges can be well approximated by straight lines. It is worth mentioning here that the angular distance between crystallographi ...
... stands for the electron wavelength, and n is the order of reflection. Because of the short wavelength at usual accelerating voltages, U, in the SEM the slightly curved band edges can be well approximated by straight lines. It is worth mentioning here that the angular distance between crystallographi ...
Self-Assembly of the First Copper (II) Infinite 2D Network with Large
... containing copper atoms Cu1, Cu1A, Cu1B, Cu1C, and Cu1D are strictly parallel with each other. The distance between these two benzene rings is 10.00 Å, and the plane of copper atoms is at the middle of the two benzene ring planes; i.e., each copper atom is out of the benzene ring plane by distance o ...
... containing copper atoms Cu1, Cu1A, Cu1B, Cu1C, and Cu1D are strictly parallel with each other. The distance between these two benzene rings is 10.00 Å, and the plane of copper atoms is at the middle of the two benzene ring planes; i.e., each copper atom is out of the benzene ring plane by distance o ...
Double Charge Ordering States and Spin Ordering State Observed
... Variable-temperature Raman spectra of our polycrystalline Er0.1Yb0.9Fe2O4 are shown in Fig. 1. The temperature dependences of the frequencies and intensities of all the observed modes are shown in Figs. 2 and 3, respectively. We observed 11 modes altogether, of which the information is summarized in ...
... Variable-temperature Raman spectra of our polycrystalline Er0.1Yb0.9Fe2O4 are shown in Fig. 1. The temperature dependences of the frequencies and intensities of all the observed modes are shown in Figs. 2 and 3, respectively. We observed 11 modes altogether, of which the information is summarized in ...
Solids - Pharmaceutical Press
... Gout usually manifests itself as a sudden excruciating pain in the big toe (usually of men), although other joints such as the ankle, heel, instep, knee, wrist, elbow, fingers or spine may be affected. It is a consequence of the precipitation of needle-like crystals of uric acid, in the form of mono ...
... Gout usually manifests itself as a sudden excruciating pain in the big toe (usually of men), although other joints such as the ankle, heel, instep, knee, wrist, elbow, fingers or spine may be affected. It is a consequence of the precipitation of needle-like crystals of uric acid, in the form of mono ...
Slide 1
... The electrons and holes freed from their positions in the crystal in this manner are said to be light generated electron-hole pairs. Both the freed electron AND the hole are free to move about the crystal. The hole moves in the following way: An electron on a neighboring atom to the atomic position ...
... The electrons and holes freed from their positions in the crystal in this manner are said to be light generated electron-hole pairs. Both the freed electron AND the hole are free to move about the crystal. The hole moves in the following way: An electron on a neighboring atom to the atomic position ...
T-Shaped Molecular Building Units in the Porous Structure of Ag(4,4
... Communications to the Editor the center of the channels. The nitrate guests form very weak interactions to the silver by binding to the vacant site (through the oxygens) in a trans fashion to the Ag-Ag bonds with AgsO ) 2.78(1) and 2.83(2) Å, which are typical of ionic interactions in metal nitrates ...
... Communications to the Editor the center of the channels. The nitrate guests form very weak interactions to the silver by binding to the vacant site (through the oxygens) in a trans fashion to the Ag-Ag bonds with AgsO ) 2.78(1) and 2.83(2) Å, which are typical of ionic interactions in metal nitrates ...
18 Semiconductors
... Electrons have negative charge and move toward positive electrode; Holes have positive charge and ”move” toward negative electrode Any electron that leaves the atom creates a “hole” in the valence orbit. • The 'hole' is an abstraction; it has no substance and does not actually move itself, but movem ...
... Electrons have negative charge and move toward positive electrode; Holes have positive charge and ”move” toward negative electrode Any electron that leaves the atom creates a “hole” in the valence orbit. • The 'hole' is an abstraction; it has no substance and does not actually move itself, but movem ...
Crystal structure
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms, ions or molecules in a crystalline liquid or solid. It describes a highly ordered structure, occurring due to the intrinsic nature of its constituents to form symmetric patterns.The crystal lattice can be thought of as an array of 'small boxes' infinitely repeating in all three spatial directions. Such a unit cell is the smallest unit of volume that contains all of the structural and symmetry information to build-up the macroscopic structure of the lattice by translation.Patterns are located upon the points of a lattice, which is an array of points repeating periodically in three dimensions. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The symmetry properties of the crystal are embodied in its space group.A crystal's structure and symmetry play a role in determining many of its physical properties, such as cleavage, electronic band structure, and optical transparency.