Tapered metallic grooves have been shown to support plasmons - electromagnetically coupled oscillations of free electrons at metal-dielectric interfaces - across a variety of configurations and V-like profiles. Such plasmons may be divided into two categories: gap-surface plasmons (GSPs) that are confined laterally between the tapered groove sidewalls and propagate either along the groove axis ...

T7 RNA polymerase recognizes a relatively small promoter extending only 17 base pairs upstream from the start site for transcription. A model for this recognition suggests that the enzyme interacts with the major groove of duplex DNA in the region centered at position -9 [Muller, D.K., et al. (1989) Biochemistry 28, 3306-3313], and recent kinetic analyses of promoters containing base analogs at...

Humans have a natural tendency to move music, which has been linked the tight coupling between auditory and motor system active role of in perception musical rhythms. High-groove music is particularly successful at inducing spontaneous movement, due engagement (motor) prediction processes. However, how listening transfers muscles even when no movement intended less known. Here we used cortico-m...

The article presents the results of experiments on cyclic loading samples with an annular V-shaped notch and their mathematical modeling. tests were carried out specimens BrKh08-Sh alloy a change in tensile load from 0 to given value. Under such loading, material groove area is subjected elastoplastic deformation, which leads failure due low-cycle fatigue. When testing using digital image corre...

The sequence logo for DNA binding sites of the bacteriophage P1 replication protein RepA shows unusually high sequence conservation ( approximately 2 bits) at a minor groove that faces RepA. However, B-form DNA can support only 1 bit of sequence conservation via contacts into the minor groove. The high conservation in RepA sites therefore implies a distorted DNA helix with direct or indirect co...

A tetracationic supramolecular cylinder, [Fe2L3] (L=C25H20N4), with a triple-helical architecture is just the right size to fit into the major groove of DNA and too big to fit into the minor groove [Angew. Chem. Int. Ed. 2001, 40, 879-884]. A detailed NMR spectroscopic analysis supported by molecular dynamics calculations shows unambiguously the close fit between the cylinder and a duplex oligo...

Tahltan is an Athapaskan language with perhaps the world's only three-way consonant harmony system (dental, alveolar, and alveopalatal). Although most explanations have depended on feature analysis, Gafos [1] proposed that differences in tongue grooving could account for the pattern. Here, we use ultrasound to examine the initial plausibility of this argument by determining whether a language w...

Grain boundary grooves are common features on polycrystalline solid–liquid interfaces. Their local microstructure can be closely approximated as a “variational” groove, the theoretical profile for which is analyzed here for its Gibbs–Thomson thermo-potential distribution. The distribution of thermo-potentials for a variational groove exhibits gradients tangential to the solid–liquid interface. ...