5,432 research outputs found
Advantages of a miniature pig model in research on human hereditary hearing loss
AbstractIn medical laboratory animals, the pig is the closest species to human in evolution, except for primates. As an animal model, the pig is highly concerned by many scientists, including comparative biology, developmental biology, medical genetics. Rodents as animal model for human hearing defects has are poor producibility and reliability, due to differences in anatomical structure, evolutionary rate and metabolic rate, but these happens to be the advantages of the pig model. In this paper, we will summarize the application of miniature pig in the study of human hereditary deafness
DiaquaÂ(nitrato-κ2 O,O′)[2-(1H-1,2,4-triazol-1-yl-κN 2)-1,10-phenanthroline-κ2 N,N′]cadmium(II) nitrate
In the title complex, [Cd(C14H9N5)(NO3)(H2O)2]NO3, the CdII ion is coordinated in a distorted pentaÂgonal-bipyramidal geometry. The equatorial sites are occupied by a 2-(1H-1,2,4-triazol-1-yl)-1,10-phenanthroline ligand in a tridentate coordination mode and a bis-chelating nitrate ligand. Two aqua ligands are coordinated at the axial sites. All non-H atoms in the equatorial plane are co-planar within 0.0673 Å. In the crystal, interÂmolecular O—H⋯O and O—H⋯N hydrogen bonds connect the components into a two-dimensional network parallel to (001). In addition, there is a π–π stacking interÂaction between symmetry-related benzene rings, with a centroid–centroid distance of 3.598 (3) Å
From Type-II Triply Degenerate Nodal Points and Three-Band Nodal Rings to Type-II Dirac Points in Centrosymmetric Zirconium Oxide
Using first-principles calculations, we report that ZrO is a topological
material with the coexistence of three pairs of type-II triply degenerate nodal
points (TNPs) and three nodal rings (NRs), when spin-orbit coupling (SOC) is
ignored. Noticeably, the TNPs reside around Fermi energy with large linear
energy range along tilt direction (> 1 eV) and the NRs are formed by three
strongly entangled bands. Under symmetry-preserving strain, each NR would
evolve into four droplet-shaped NRs before fading away, producing distinct
evolution compared with that in usual two-band NR. When SOC is included, TNPs
would transform into type-II Dirac points while all the NRs have gaped.
Remarkably, the type-II Dirac points inherit the advantages of TNPs: residing
around Fermi energy and exhibiting large linear energy range. Both features
facilitate the observation of interesting phenomena induced by type-II
dispersion. The symmetry protections and low-energy Hamiltonian for the
nontrivial band crossings are discussed.Comment: 7 pages, 5 figures, J. Phys. Chem. Lett. 201
Construction and validation of a short-form Quality-Of-Life Scale for Chinese Patients with Benign Prostatic Hyperplasia
© 2009 Guo et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens
Quantum correlation and classical correlation dynamics in the spin-boson model
We study the quantum correlation and classical correlation dynamics in a
spin-boson model. For two different forms of spectral density, we obtain
analytical results and show that the evolutions of both correlations depend
closely on the form of the initial state. At the end of evolution, all
correlations initially stored in the spin system transfer to reservoirs. It is
found that for a large family of initial states, quantum correlation remains
equal to the classical correlation during the course of evolution. In addition,
there is no increase in the correlations during the course of evolution.Comment: 10 pages, 5 figure
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