Results 31 to 40 of about 114,417 (310)
Biophysics and Physicobiology, 2019 The number of degrees of freedom (DOF), N, in normal mode analysis (NMA) calculations of proteins is a crucial problem in huge systems because the eigenvalue problem of an N-by-N matrix must be solved.
Shigeru Endo, Hiroshi Wako
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2-[3,4-Dibutoxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thienyl]-5-phenyl-1,3,4-oxadiazole
Acta Crystallographica Section E, 2008 In the title compound, C28H28N4O4S, the dihedral angles between the central thiophene ring and its pendant oxadiazole rings are 1.2 (3) and 9.8 (3)°.
Hai-lin Li +3 more
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Regge calculus from a new angle [PDF]
, 2009 In Regge calculus space time is usually approximated by a triangulation with flat simplices. We present a formulation using simplices with constant sectional curvature adjusted to the presence of a cosmological constant.
Bahr B +22 more
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Das Kupfertetramminion, ein empfindliches Reagens für CD-Untersuchungen von Kohlenhydraten
CHIMIA, 1973 The circular dichroism spectra of carbohydrate copper tetrammonia solutions allow to get valuable information about the configuration and conformation of sugars.
Wolfgang Voelter +2 more
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Action-angle variables for dihedral systems on the circle [PDF]
Physics Letters A, 2010 A nonrelativistic particle on a circle and subject to a cos^{-2}(k phi) potential is related to the two-dimensional (dihedral) Coxeter system I_2(k), for k in N. For such `dihedral systems' we construct the action-angle variables and establish a local equivalence with a free particle on the circle.
Vahagn Yeghikyan +2 more
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tert-Butyl N-benzyl-N-[4-(4-fluorobenzoylmethyl)-2-pyridyl]carbamate
Acta Crystallographica Section E, 2008 In the crystal structure of the title compound, C25H25FN2O3, the pyridine ring makes dihedral angles of 75.1 (3), 39.4 (3) and 74.6 (3)° with the phenyl ring, the carbamate plane and the 4-fluorophenyl ring, respectively.
Pierre Koch +2 more
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3,3′-Bis(4-chlorophenyl)-2,2′-(m-phenylenedioxy)diquinazolin-4(3H)-one
Acta Crystallographica Section E, 2009 In the title compound, C34H20Cl2N4O4, the two quinazoline heterocyclic systems and the adjacent chlorobenzene rings are not coplanar, but oriented at dihedral angles of 66.66 (13) and 52.48 (12)°, respectively.
Hai-Zhou Yang, Hai-Tao Gao, Xu-Hong Yang
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1,2-Bis(2-methyl-5-phenyl-3-thienyl)benzene
Acta Crystallographica Section E, 2009 In the molecule of the title compound, C28H22S2, the two thiophene rings are twisted with respect to the central benzene ring, making dihedral angles of 71.59 (12) and 50.71 (12)°.
Cong-Bin Fan +4 more
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Dihedral angles of n-simplices
Applied Mathematics Letters, 1992 It is proved that if \(\{v_ 1,\dots,v_ n\}\) is a set of orthogonal nonzero vectors in \(E^ n\), if \(F_ i\) is an \((n-1)\)-dimensional face of the \(n\)-simplex \([v_ 0,v_ 1,\dots,v_ n]\) for \(i=1,2,\dots,n\) and if \(\theta_{kl}\) is the dihedral angle between \(F_ k\) and \(F_ l\), then \(\Sigma\cos^ 2\theta_{kl}=1\). Also in the case of a regular
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Acta Crystallographica Section E, 2008 In the title compound, C36H44N4O4S, the dihedral angles between the central thiophene ring and the pendent oxadiazole rings are 12.7 (2) and 13.7 (2)°, and the dihedral angles between the oxadiazole rings and their adjacent benzene rings
Jian-ning Guan +3 more
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