Results 211 to 220 of about 60,361 (264)
Zero electromagnetic coupling of closely spaced identical helical resonators. [PDF]
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Optimization of helix angle for helical gear system
Journal of Mechanical Science and Technology, 2008A method is presented to optimize the helix angle of a helical gear from the viewpoint of the transmission error, which is the deflection of the teeth due to the transmitted load. The deflection of the gear teeth is calculated by using the bending and shear influence function, which is formulated from the common formula for deflection obtained from FEM,
Choi Yeon-Sun
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Helix-helix packing angle preferences for finite helix axes
Proteins: Structure, Function, and Genetics, 1998Recently, James Bowie addressed the question of how to normalize correctly the distribution of observed helix-helix packing angles in proteins (Bowie, Nature Struct. Biol. 4:915-917, 1997). A hitherto unrealized yet significant bias toward crossed packing angles was revealed. However, the derived random reference distribution of packing angles requires
D, Walther, C, Springer, F E, Cohen
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Junctional angle of a bihanded helix
Physical Review E, 2014Helical filaments having sections of reversed chirality are common phenomena in the biological realm. The apparent angle between the two sections of opposite handedness provides information about the geometry and elasticity of the junctional region.
Jing, Yang +2 more
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Computational Models for the Helix Tilt Angle
Journal of Chemical Information and Computer Sciences, 2004The concept of hydrophobic imbalance and that of hydrophobic and hydrophilic centers are used along with side chain models in the computation of helix orientation and tilt angle in or near a membrane. Rotamer statistics are used to infer typical side chain positions and chain length for each amino acid, and the results are used in fast computation of ...
Yizong Cheng +3 more
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Implementation and application of helix–helix distance and crossing angle restraint potentials
Journal of Computational Chemistry, 2006AbstractBased on the definition of helix–helix distance and crossing angle introduced by Chothia et al. (J Mol Biol 1981, 145, 215), we have developed the restraint potentials by which the distance and crossing angle of two selected helices can be maintained around target values during molecular dynamics simulations.
Jinhyuk Lee, Wonpil Im
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Analysis of patterns of twist angles in DNA double helix
International Journal of Biological Macromolecules, 1990We have analysed theoretically the patterns of twist angles of B-DNA by the Tung-Harvey model mainly. It is shown that for a sequence of twist angles a smaller twist angle tends to follow a larger one and vice versa. Therefore the sequence of twist angles always takes a gentle zig-zag form.
C T, Zhang, G F, Zhou
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Helix packing angle preferences
Nature Structural & Molecular Biology, 1997The distribution of interaxial angles between packed alpha-helices has been explained by a number of elegant models describing how side chains on helices can interdigitate without steric conflicts. Here I show that much of the apparent preference for particular angles is due to statistical bias and that true packing angle preferences are not well ...
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Analysis of sequences of twist angles in DNA double helix
International Journal of Biological Macromolecules, 1989By assuming that the realistic DNA chains are random sequence of bases and using the Tung-Harvey formula for the prediction of twist angles, it is shown that the mean value of the sequence of twist angles is almost sequence-independent. In general the variance for the A, T-rich sequence is larger than that of G, C-rich sequence.
C T, Zhang, G F, Zhou
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