The conductivity of a single aromatic ring, perpendicular to its plane, is determined using a new strategy under ambient conditions and at room temperature by a combination of molecular assembly, scanning tunneling microscopy (STM) imaging, and STM break junction (STM-BJ) techniques. The construction of such molecular junctions exploits the formation of highly ordered structures of flat-oriente...

Non-paired nucleotides stabilize the formation of three-way helical DNA junctions. Two or more unpaired nucleotides located in the junction region enable oligomers ten to fifteen nucleotides long to assemble, forming conformationally homogeneous junctions, as judged by native gel electrophoresis. The unpaired bases can be present on the same strand or on two different strands. Up to five extra ...

Functional chromaffin cell plasticity in response to stress: focus on nicotinic, gap junction and voltage-gated Ca channels Nathalie C. Guérineau, Michel G. Desarménien, Valentina Carabelli, Emilio Carbone Integrated Mitochondrial and Neurovascular Biology, CNRS UMR6214, Inserm U1083, University of Angers, Angers, France, Institute of Functional Genomics, CNRS UMR5203, Inserm U661, Universities...

It has come to the attention of the authors that Bélanger et al. (Bélanger, G., Stocksley, M.A., Vandromme, M., Schaeffer, L., Furic, L., Desgroseillers, L., Jasmin, B.J., 2003. Localization of the RNA-binding proteins Staufen1 and Staufen2 at the mammalian neuromuscular junction. J. Neurochem. 86, 669–677) reported that Staufen 1 and 2 localise to the postsynaptic side of mouse neuromuscular j...

The structure and the degeneracy of the ground state of a fully-frustrated XY -model are investigated for the case of a dice lattice geometry. The results are applicable for the description of Josephson junction arrays and thin superconducting wire networks in the external magnetic field providing halfinteger number of flux quanta per plaquette. The mechanisms of disordering of vortex pattern i...

A range of high performance minority carrier devices have been successfully fabricated on Si “virtual” substrates where threading dislocation densities (TDDs) as low as 1x10 cm are routinely achieved. Minority carrier lifetime data achieved on GaAs-on-Si layers exploiting this novel SiGe buffer approach to monolithic integration (τp = 10.5 ns and τn = 1.7ns) verifies the high III-V material qua...

Silicon-based backward diodes incorporating d-doped active regions for direct detection of microwave radiation with zero external DC bias have been demonstrated at room temperature and characterised for their sensitivity. The resulting backward diodes, which were grown by low temperature molecular beam epitaxy, show a high zero-bias curvature coefficient (g) of 23.2 V 1 with a junction resistan...

We consider the effect of disorder on coherent tunneling through two barriers in series, in the regime of overlapping transmission resonances. We present analytical calculations (using random-matrix theory) and numerical simulations (on a lattice) to show that strong mode-mixing in the inter-barrier region induces mesoscopic fluctuations in the conductance G of universal magnitude e2/h for a sy...

Congenital hearing loss with many genetic and environmental causes affects 1 in 1000 newborns. Mutations in the GJB2(Gap Junction Beta-2) gene encoding the gap junction protein connexin 26 have been established as the main cause of autosomal recessive non-syndromic hearing loss. The aim of this study was to study the frequency of one mutation (35delG) of GJB2 gene in Kerman non-syndromic deaf p...