Tetrahedral sentence example

tetrahedral
  • "Tetrahedral co-ordinates" are a system of quadriplanar co-ordinates, the fundamental planes being the faces of a tetrahedron, and the co-ordinates the perpendicular distances of the point from the faces, a positive sign being given if the point be between the face and the opposite vertex, and a negative sign if not.
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  • The formula has the advantage that it may be constructed from tetrahedral models of the carbon atom; but it involves the assumption that the molecule has within it a mechanism, equivalent in a measure to a system of railway points, which can readily close up and pass into that characteristic of benzene.
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  • The accidental use of a single name, America, for the pair of continents that has a greater extension from north to south than any other continuous land area of the globe, has had some recent justification, since the small body of geological opinion has turned in favour of the theory of the tetrahedral deformation of the earth's crust as affording explanation of the grouping of continents and oceans.
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  • America, broadening in the north as if to span the oceans by reaching to its neighbours on the east and west, tapering between vast oceans far to the south where the nearest land is in the little-known Antarctic regions, roughly presents the triangular outline that is to be expected from tetrahedral warping; and although greatly broken in the middle, and standing with the northern and southern parts out of a meridian line, America is nevertheless the best witness among the continents of to-day to the tetrahedral theory.
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  • The tetraspores may arise by the simultaneous division of the contents of a sporangium, when they are arranged tetrahedrally, or they may arise by two successive divisions, in which case the arrangement may be zonate when the spores are in a row, or cruciate when the second divisions are at right angles to the first, or tetrahedral when the second divisions are at right angles to the first and also to one another.
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  • It is chiefly remarkable for its finely preserved fortifications constructed of tetrahedral and polygonal blocks of local limestone well jointed, with maximum dimensions of about 3 by i z ft.; the outer circuit of the city wall measures about 22 m.
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  • The microspores are tetrahedral.
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  • The lower density of ice is caused by its structure, a hydrogen bonded tetrahedral network similar to that of diamond.
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  • This can be seen in the following picture, in which there is an atom in a tetrahedral interstice.
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  • Central to the present approach is the geometric flexibility of an unstructured tetrahedral computational mesh [12] .
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  • The tetrahedral structuring possesses five-fold symmetry, which prevents easy freezing in line with the pronounced supercooling found for intracellular water.
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  • Locating specific metal coordination geometries, e.g. tetrahedral rather than square planar.
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  • The " tetrahedral theory " brought forward by Lowthian Green,' that the form of the earth is a spheroid based on a regular tetrahedron, is more serviceable, because it accounts for three very interesting facts of the terrestrial plan - (1) the antipodal position of continents and ocean basins; (2) the tri angular outline of the continents; and (3) the excess of sea in the southern hemisphere.
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  • A volume data set is often modeled by decomposing its domain through a tetrahedral mesh with vertices at the data points.
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  • Ice is usually composed of a lattice of water molecules arranged with perfect tetrahedral geometry.
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  • The H-C-H bond angles are all 109 ° 28 ' (approximately 109.5 ° ). This is called the tetrahedral bond angle.
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  • Four electron pairs arrange themselves in space in what is called a tetrahedral arrangement.
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  • In diamond, each carbon atom is bonded to four other carbon atoms in a tetrahedral structure, like a pyramid.
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  • The cations are arranged into a face centered cubic structure with the anions occupying the tetrahedral sites.
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  • Here 's another example... The chloromethane molecule, CH 3 Cl molecule is tetrahedral in shape.
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