| |  | | | | | Weekly Content Alert
|  | | 07 August 2012 | | | Featured image: | |  | | | Ambrosio et al. study spiral patterns induced by vortex light beams in azo-polymer thin films. | | | | | | |
Advertisement | | | | | | | | | Latest Articles | View all Articles | | | | | Observation of resistively detected hole spin resonance and zero-field pseudo-spin splitting in epitaxial graphene OPEN | | | Ramesh G. Mani, John Hankinson, Claire Berger and Walter A. de Heer | | | Along with its electronic characteristics, the spin properties of graphene have recently received increasing attention in the context of spintronic applications. Using microwave radiation, Mani et al. identify resistively detected spin resonance in monolayer and trilayer graphene sheets and extract the value for the Landé g-factor. | | | 07 Aug | Nat Commun 3:996 doi:10.1038/ncomms1986 (2012) | | | Physical sciences Applied physics | | | Condensed matter Materials science | | | | | | Abstract | Full Text | PDF (452 kB) |
| Distinct loops in arrestin differentially regulate ligand binding within the GPCR opsin OPEN | | | Martha E. Sommer, Klaus Peter Hofmann and Martin Heck | | | Following retinal cis/trans isomerisation, the active form of the G-protein-coupled receptor rhodopsin decays to opsin and all-trans-retinal. In this study, arrestin, a regulator of G-protein-coupled receptor activity, is shown to facilitate the concurrent sequestering of toxic all-trans-retinal and regeneration of 11-cis-retinal within the opsin population. | | | 07 Aug | Nat Commun 3:995 doi:10.1038/ncomms2000 (2012) | | | Biological sciences Biochemistry | | | Biophysics | | Abstract | Full Text | PDF (1,026 kB) |
Supplementary Information |
| Post-transcriptional spliceosomes are retained in nuclear speckles until splicing completion | | | Cyrille Girard, Cindy L. Will, Jianhe Peng, Evgeny M. Makarov, Berthold Kastner, Ira Lemm, Henning Urlaub, Klaus Hartmuth and Reinhard Lührmann | | | It is unclear where in the nucleus splicing takes place and how much occurs post-transcriptionally. Using antibodies raised against a phosphorylated splicing factor, Girard et al. show that the majority of splicing occurs co-transcriptionally and that post-transcriptional splicing occurs in nuclear speckles. | | | 07 Aug | Nat Commun 3:994 doi:10.1038/ncomms1998 (2012) | | | Biological sciences Biochemistry | | | Cell biology Molecular biology | | | | | Abstract | Full Text | PDF (1,492 kB) |
Supplementary Information |
| High-resolution three-dimensional partially coherent diffraction imaging | | | J.N. Clark, X. Huang, R. Harder and I.K. Robinson | | | Coherent diffractive imaging exploits coherent X-ray sources to image objects from their diffraction patterns, but fails for decreasing coherence. Using partially coherent diffraction patterns, Clark et al. obtain three dimensional reconstructions of nanocrystals and determine the wavefield coherence. | | | 07 Aug | Nat Commun 3:993 doi:10.1038/ncomms1994 (2012) | | | Physical sciences Optical physics | | Abstract | Full Text | PDF (575 kB) |
Supplementary Information |
| Higgs transition from a magnetic Coulomb liquid to a ferromagnet in Yb2Ti2O7 OPEN | | | Lieh-Jeng Chang, Shigeki Onoda, Yixi Su, Ying-Jer Kao, Ku-Ding Tsuei, Yukio Yasui, Kazuhisa Kakurai and Martin Richard Lees | | | Quantum spin ice is a magnetic state of matter which can have host to monopole excitations. Using polarized neutron scattering, Chang et al. show that the quantum spin ice material ytterbium titanate undergoes a Higgs transition of emergent magnetic monopoles from a Coulomb liquid to a ferromagnetic phase. | | | 07 Aug | Nat Commun 3:992 doi:10.1038/ncomms1989 (2012) | | | Physical sciences Condensed matter | | | Materials science | | | | | Abstract | Full Text | PDF (663 kB) |
Supplementary Information |
| Dynamic histone marks in the hippocampus and cortex facilitate memory consolidation | | | Johannes Gräff, Bisrat T. Woldemichael, Dominik Berchtold, Grégoire Dewarrat and Isabelle M. Mansuy | | | Changes in gene expression in the hippocampus and the cortex are pivotal for memory consolidation. Gräff and colleagues use a recognition task in mice to show that epigenetic post-translational modifications are rapidly activated in the hippocampus after learning, but induced with a delay in the cortex. | | | 07 Aug | Nat Commun 3:991 doi:10.1038/ncomms1997 (2012) | | | Biological sciences Molecular biology | | | Neuroscience | | Abstract | Full Text | PDF (492 kB) |
Supplementary Information |
| Controlled delivery of bioactive molecules into live cells using the bacterial mechanosensitive channel MscL | | | Julia F. Doerner, Sebastien Febvay and David E. Clapham | | | The bacterial channel protein MscL opens in response to mechanical forces and could be exploited for vesicular-based drug delivery. Doerner et al. show that functional MscL can be expressed in mammalian cells and facilitate the controlled cellular uptake of relatively large, membrane-impermeable bioactive molecules. | | | 07 Aug | Nat Commun 3:990 doi:10.1038/ncomms1999 (2012) | | | Biological sciences Biophysics | | | Cell biology | | Abstract | Full Text | PDF (938 kB) |
Supplementary Information |
| Light-induced spiral mass transport in azo-polymer films under vortex-beam illumination OPEN | | | Antonio Ambrosio, Lorenzo Marrucci, Fabio Borbone, Antonio Roviello and Pasqualino Maddalena | | | Non-uniform light beams can create patterns in azo-polymer films by inducing mass transport, yet the process is not well understood. Using optical vortex beams, Ambrosio et al. observe the formation of spiral patterns that are surprisingly sensitive to the optical phase, which they explain with a new model. | | | 07 Aug | Nat Commun 3:989 doi:10.1038/ncomms1996 (2012) | | | Physical sciences Materials science | | | Nanotechnology | | | Optical physics | | Abstract | Full Text | PDF (1,146 kB) |
Supplementary Information |
| Skyrmion flow near room temperature in an ultralow current density | | | X.Z. Yu, N. Kanazawa, W.Z. Zhang, T. Nagai, T. Hara, K. Kimoto, Y. Matsui, Y. Onose and Y. Tokura | | | Current-induced motion of magnetic nanostructures, such as skyrmions or domain walls, is envisioned as a promising scalable technology for information storage. Yu et al. demonstrate near-room-temperature motion of skyrmions with current densities orders of magnitude lower than previously reported in domain walls. | | | 07 Aug | Nat Commun 3:988 doi:10.1038/ncomms1990 (2012) | | | Physical sciences Condensed matter | | | Materials science Nanotechnology | | Abstract | Full Text | PDF (3,292 kB) |
Supplementary Information |
| Multimode circuit optomechanics near the quantum limit OPEN | | | Francesco Massel, Sung Un Cho, Juha-Matti Pirkkalainen, Pertti J. Hakonen, Tero T. Heikkilä and Mika A. Sillanpää | | | Optomechanical systems allow for the exploration of macroscopic behaviour at or near the quantum limit. Massel et al. use micromechanical resonators to study the hybridisation of one photonic and two phononic modes with phonon numbers down to 1.8, showing a coupling between all three degrees of freedom. | | | 07 Aug | Nat Commun 3:987 doi:10.1038/ncomms1993 (2012) | | | Physical sciences Nanotechnology | | | Optical physics | | Abstract | Full Text | PDF (783 kB) |
Supplementary Information |
| FoxP3 + regulatory CD4 T cells control the generation of functional CD8 memory OPEN | | | M.G. de Goër de Herve, S. Jaafoura, M. Vallée and Y. Taoufik | | | The role of CD4+ T cells in the generation of memory CD8+ T cells is not fully understood. In this study, the exposure of CD8 memory precursors to interleukin-2 during early antigen priming is shown to be controlled by FoxP3+ regulatory CD4+ T cells, resulting in the production of functional memory cells. | | | 07 Aug | Nat Commun 3:986 doi:10.1038/ncomms1992 (2012) | | | Biological sciences Immunology | | Abstract | Full Text | PDF (755 kB) |
Supplementary Information |
| Imaging high-dimensional spatial entanglement with a camera OPEN | | | M.P. Edgar, D.S. Tasca, F. Izdebski, R.E. Warburton, J. Leach, M. Agnew, G.S. Buller, R.W. Boyd and M.J. Padgett | | | Measuring the entanglement between down-converted photons is central to many quantum optical experiments, and is normally performed by scanning detectors stepwise across a plane. Edgar et al. use a CCD camera to measure the entire entangled light field, finding strong correlations in position and momentum. | | | 07 Aug | Nat Commun 3:984 doi:10.1038/ncomms1988 (2012) | | | Physical sciences Optical physics | | | | | | Abstract | Full Text | PDF (1,178 kB) | | | | | | | | |
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