Results 1 to 10 of about 1,675 (45)
Simulations demonstrate a simple network to be sufficient to control branch point selection, smooth muscle and vasculature formation during lung branching morphogenesis [PDF]
G. Celli\`ere, D Menshykau and Dagmar Iber (2012) Biology Open 1,
775-788, 2012 Proper lung functioning requires not only a correct structure of the conducting airway tree, but also the simultaneous development of smooth muscles and vasculature. Lung branching morphogenesis is strongly stereotyped and involves the recursive use of only three modes of branching.
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Topological transport of deconfined hedgehogs in magnets [PDF]
Phys. Rev. Lett. 125, 267201 (2020), 2020 We theoretically investigate the dynamics of magnetic hedgehogs, which are three-dimensional topological spin textures that exist in common magnets, focusing on their transport properties and connections to spintronics. We show that fictitious magnetic monopoles carried by hedgehog textures obey a topological conservation law, based on which a ...
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Branch Mode Selection during Early Lung Development [PDF]
PLoS Comput Biol 8(2): e1002377 (2012), 2012 Many organs of higher organisms, such as the vascular system, lung, kidney, pancreas, liver and glands, are heavily branched structures. The branching process during lung development has been studied in great detail and is remarkably stereotyped. The branched tree is generated by the sequential, non-random use of three geometrically simple modes of ...
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Neurotrophic Effects of Intermittent Fasting, Calorie Restriction and Exercise: A Review and Annotated Bibliography [PDF]
arXiv, 2023 In the last decades, important progress has been achieved in the understanding of the neurotrophic effects of intermittent fasting (IF), caloric restriction (CR) and exercise. Improved neuroprotection, synaptic plasticity and adult neurogenesis (NSPAN) are essential examples of these neurotrophic effects. The importance in this respect of the metabolic
arxiv
Some properties of the nematic radial hedgehog in Landau-de Gennes' theory [PDF]
Journal of Mathematical Analysis and applications 397, 2 (2013) pp
586-594, 2012 In the Landau-de Gennes theoretical framework of a $Q -tensor description of nematic liquid crystals, we consider a radial hedgehog defect with strong anchoring conditions in a ball $B \subset \mathbb{R}^3$ . We show that the scalar order parameter is monotonic, and we prove uniqueness of the minimizing hedgehog below the spinodal temperature $T^\ast$ .
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Gravitational hedgehog, stringy hedgehog and stringy sphere [PDF]
JHEP 0311 (2003) 058, 2003 We investigate the solutions of Einstein equations such that a hedgehog solution is matched to different exterior or interior solutions via a spherical shell. In the case where both the exterior and the interior regions are hedgehog solutions or one of them is flat, the resulting spherical shell becomes a stringy shell.
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Locating large flexible ligands on proteins [PDF]
, 2017 Many biologically important ligands of proteins are large, flexible, and often charged molecules that bind to extended regions on the protein surface. It is infeasible or expensive to locate such ligands on proteins with standard methods such as docking or molecular dynamics (MD) simulation.
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Stability of the B=2 hedgehog in the Skyrme model [PDF]
Nucl.Phys. A602 (1996) 347-374, 1995 We study the unstable modes of the baryon number two hedgehog of the Skyrme model on a three dimensional spatial lattice. An expansion of the Skyrme Lagrangian around the hedgehog configuration provides the equations of motion for the fluctuation fields solvable numerically via a relaxation method. We find the negative energy modes and, by evolving the
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On Ramsey numbers of hedgehogs [PDF]
Combinator. Probab. Comp. 29 (2020) 101-112, 2019 The hedgehog $H_t$ is a 3-uniform hypergraph on vertices $1,\dots,t+\binom{t}{2}$ such that, for any pair $(i,j)$ with $1\le i
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Response of nucleons to external probes in hedgehog models: I. Electromagnetic polarizabilities [PDF]
Phys.Rev.D47:299-312,1993, 1992 Electromagnetic polarizabilities of the nucleon are analyzed in a hedgehog model with quark and meson degrees of freedom.
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