On Bending-Twisting coupled laminates
نویسندگان
چکیده
منابع مشابه
Twisting and bending stress in DNA minicircles.
The interplay between bending of the molecule axis and appearance of disruptions in circular DNA molecules, with ∼100 base pairs, is addressed. Three minicircles with different radii and almost equal contents of AT and GC pairs are investigated. The DNA sequences are modeled by a mesoscopic Hamiltonian which describes the essential interactions in the helix at the level of the base pair and inc...
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Transposition is a multistep process in which a transposable element DNA sequence moves from its original genetic location to a new site. Early steps in this process include the formation of a transposition complex in which the end sequences of the transposable element are brought together in a structurally precise fashion through the action of the element-encoded transposase protein and the cl...
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Families of inextensible fibers forming a surface are considered. Each fiber supports a twisting couple proportional to the torsion of the fiber. The strain energy density is written in an additive form, such that the contributions due to shearing, twisting and bending effects are taken into account separately. The equilibrium equations, here obtained, are a particular case of the ones obtained...
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Single-stranded regions (gaps) in nucleosomal DNA interfere with action of the RSC chromatin-remodeling complex, monitored by exposure of restriction endonuclease cutting sites. Single-strand breaks (nicks) in the DNA, by contrast, have no effect. Gaps on one side of the cutting site are inhibitory, but gaps on the other side are not. A gap >100 bp from the cutting site is as effective as a gap...
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We derive the elastic theory suitable for describing the free energy required to deform a stiff helical molecule with the symmetry of DNA. At quadratic levels in the strains we find, in addition to the independent bending and torsional energies incorporated in previous theories, a previously unknown coupling between twist and bend. If the backbone is given constant curvature, minimization of th...
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ژورنال
عنوان ژورنال: Composite Structures
سال: 2017
ISSN: 0263-8223
DOI: 10.1016/j.compstruct.2016.10.063