Results 21 to 30 of about 1,385,865 (356)
Symmetry-Breaking Motility [PDF]
Locomotion of bacteria by actin polymerization, and in vitro motion of spherical beads coated with a protein catalyzing polymerization, are examples of active motility. Starting from a simple model of forces locally normal to the surface of a bead, we construct a phenomenological equation for its motion.
Allen S. Lee+3 more
openaire +4 more sources
Semaphorin Breaks Symmetry [PDF]
Axon-dendrite polarity is likely instructed by extrinsic cues in the developing nervous system, though the mechanisms governing this process remain to be fully elucidated. In this issue of Neuron, Shelly et al. show that the axon guidance cue Semaphorin 3A can promote dendrite growth by inhibiting axon specification.
Audrey S. Howell, Kang Shen
openaire +3 more sources
Selection rules for breaking selection rules
Floquet systems often exhibit dynamical symmetries (DS) that govern the time-dependent dynamics and result in selection rules. When a DS is broken, selection rule deviations are expected.
Matan Even Tzur+3 more
doaj +1 more source
Visualizing the Breaking of Symmetry [PDF]
Axon specification is a hallmark of neuron polarization. Although several models have been proposed, few studies have provided clues about polarization events in real time. Using time-lapse imaging, a recent study described visualizing symmetry-breaking events during this process.
Bing Ye, Yuh Nung Jan
openaire +3 more sources
Breaking symmetry in myxobacteria [PDF]
O.A.I. was supported by a Howard Hughes predoctoral fellowship. G.O. was supported by National Science Foundation grant DMS-9972826 and National Institutes of Health grant GM59875-02. D.K. was supported by National Institutes of Health Grant GM23441.
Oleg A. Igoshin+2 more
openaire +3 more sources
Symmetry breaking charge separations have been found to be important for charge transfer in bacteriochlorophyll pairs in photosynthetic reaction centers, but engineering symmetry breaking charge separations in artificial dimers of related chromophores is
Lingbo Wen+8 more
doaj +1 more source
Hsp90: Breaking the Symmetry [PDF]
Hsp90 chaperones receive much attention due to their role in cancer and other pathological conditions, and a tremendous effort of many laboratories has contributed in the past decades to considerable progress in the understanding of their functions. Hsp90 chaperones exist as dimers and, with the help of cochaperones, promote the folding of numerous ...
Laura Le Breton, Matthias P. Mayer
openaire +3 more sources
Applications of Symmetry Breaking in Plasmonics
Plasmonics is one of the most used domains for applications to optical devices, biological and chemical sensing, and non-linear optics, for instance. Indeed, plasmonics enables confining the electromagnetic field at the nanoscale.
G. Barbillon, A. Ivanov, A. Sarychev
semanticscholar +1 more source
Breaking of topological symmetry [PDF]
12 ...
José M. F. Labastida, M. Alvarez
openaire +4 more sources
Symmetry Breaking in Tournaments [PDF]
We provide upper bounds for the determining number and the metric dimension of tournaments. A set of vertices $S \subseteq V(T)$ is a determining set for a tournament $T$ if every nontrivial automorphism of $T$ moves at least one vertex of $S$, while $S$ is a resolving set for $T$ if every two distinct vertices in $T$ have different distances to some ...
openaire +4 more sources