(n.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.
Example Sentences:
(1) The structure of the activated forms of CF1 can be described best as an intermediate between the dimeric arrangement of latent CF1 and an octahedron.
(2) Location and refinement of the two inequivalent H atoms permitted a detailed analysis of the hydrogen bonding, which occurs principally between the oxygen octahedron and the bromate groups.
(3) The room-temperature structure is very similar to that reported previously for a sample at 169 K. The water O atoms form a very slightly distorted octahedron about nickel while the perbromate-ion geometry is virtually regular tetrahedral.
(4) The central molybdenum atom adopts a distorted octahedral coordination geometry with one face of the octahedron occupied by the tridentate pyrazolylborate ligand and the opposite face by the oxo and the two phenolato ligands.
(5) The coordination environment of the Mg atom is a very nearly regular octahedron of water O atoms.
(6) The quaternary structure of the protein molecule is approximated by a model consisting of six spherical subunits situated at the vertices of an octahedron having the symmetry 32.
(7) The single type of Al ion is coordinated by six inequivalent water O atoms which form a slightly distorted octahedron.
(8) Scanning electron microscopy was employed to elucidate the structure of the crystals, which were found to exist as regular octahedrons ranging in size from 5 to 90 micrometers.
(9) The different spectral forms result from the extent of distortion of the MnIV octahedron.
(10) By computer calculation with the use of atom-atom potentials a stereochemical model of the DNA-hydrate Na+ complex was obtained according to which the Na+(H2O)6 octahedrons are localized in the narrow groove of DNA with formation of a great number of van der vaals contacts and hydrogen bonds.
(11) In the case of artificially produced conjugate containing six cross-linked CT molecules, this is observed at Wo = 43 when rc is equal to the radius of the sphere surrounding the absolute octahedron composed of six CT globules.
(12) In one simulation, one alpha-cyclodextrin form in a "truncated octahedron box" containing 611 water molecules is simulated over 90 picoseconds to mimic the solution structure.
(13) The average Al--O distance within the octahedron is 1.872 (11) A.
Polyhedron
Definition:
(n.) A body or solid contained by many sides or planes.
(n.) A polyscope, or multiplying glass.
Example Sentences:
(1) These viruses are short-tailed polyhedrons resembling the SpV3 virus of Spiroplasma citri, and all have been shown to lyse at least one other strain of SRO.
(2) In the intact and elastase-treated cages, the clathrin extends from the vertices into the interior of the polyhedron and forms an inner shell of material.
(3) These observations were compared with the possible combinations of polygonal sections through various polyhedral models proposed by other workers and the five classical regular polyhedrons.
(4) The Voronoi polyhedron of a given S-phase cell nucleus is that polyhedron of minimal volume defined by planes all of which are perpendicular bisectors of the vectors extending from the given cell to all other S-phase cells in the tumor.
(5) The co-ordination polyhedron displays approximate 4m2 symmetry.
(6) A minimal data structure of the polyhedron is then proposed, which contains only topological informations, since no coordinates have been generated.
(7) We hypothesize that this distinct 9S form represents a major oligomeric subunit involved in assembly and disassembly of clathrin polyhedron coats in the living cell.
(8) Bioassays of the two pure virus variants in M. brassicae larvae have shown the LD50 values to be 4610 polyhedron inclusion bodies (pibs) for PfMNPV(A) and 5937 pibs for PfMNPV(B).
(9) Electron micrographs suggest that the eight subunits form a polyhedron of point symmetry D4, or 42.
(10) A suitable composition for the residual glass phase of bioactive glass-ceramics can be found approximately and controlled on the basis of calculation of a structural parameter Y, which in the simplified concept of the glass structure corresponds to the mean number of bridging oxygens per polyhedron in the glass lattice.
(11) The direct assay using 125I-labeled rabbit immunoglobulins could detect 0.2 microng of polyhedron protein, and the indirect method using 125I-labeled sheep antirabbit immunoglobulins could detect 0.05 microng of polyhedron protein.
(12) Morphologically, the virus is a rectilinear polyhedron 270 A in diameter, without a process.
(13) The biological function of zinc is governed by the composition of its tetrahedral coordination polyhedron in the metalloprotein, and each ligand group that coordinates to the metal ion does so with a well-defined stereochemical preference.
(14) Successive calvarial and craniofacial polyhedron expansion, as well as weight, showed considerable variability and interindividual variation throughout the observation period.
(15) A complementary DNA that encodes a bovine brain, calmodulin-sensitive (type I) adenylylcyclase has been inserted into the baculovirus genome under the control of the strong polyhedron promoter.
(16) The head of phi25 is a regular polyhedron measuring 75 nm in diameter.
(17) RV volume was calculated from the polyhedron created by the markers by decomposing the polyhedron into 24 tetrahedrons, each of whose volumes could be solved from the xyz-coordinates of markers.
(18) for the optimum approximation of experimentally obtained values of the output signal, the method of the changeable polyhedron was applied belonging to the optimalization numerical methods used in the regulation technics.
(19) The coordination polyhedron of catalytic zinc is usually dominated by histidine side chains.
(20) The weak NO3- inhibitor does not displace Wat263 from the metal coordination but occupies a fifth binding site changing the zinc coordination polyhedron into a slightly distorted trigonal bipyramid.