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363 Newest Publications in proceedings of the national academy of sciences current issue

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matching the following criteria

Cortical cell and neuron density estimates in one chimpanzee hemisphere [Neuroscience]

19-Jan-2016 | Christine E. Collins; Emily C. Turner; Eva Kille Sawyer; Jamie L. Reed; Nicole A. Young; David K. Flaherty; Jon H. Kaas, Proceedings of the National Academy of Sciences current issue, 2016

The density of cells and neurons in the neocortex of many mammals varies across cortical areas and regions. This variability is, perhaps, most pronounced in primates. Nonuniformity in the composition of cortex suggests regions of the cortex have different specializations. Specifically, regions ...

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Evolution of South Atlantic density and chemical stratification across the last deglaciation [Earth, Atmospheric, and Planetary Sciences]

19-Jan-2016 | Jenny Roberts; Julia Gottschalk; Luke C. Skinner; Victoria L. Peck; Sev Kender; Henry Elderfield; Claire Waelbroeck; ..., Proceedings of the National Academy of Sciences current issue, 2016

Explanations of the glacial–interglacial variations in atmospheric pCO2 invoke a significant role for the deep ocean in the storage of CO2. Deep-ocean density stratification has been proposed as a mechanism to promote the storage of CO2 in the deep ocean during glacial times. A wealth of proxy ...

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Hepatitis C virus utilizes VLDLR as a novel entry pathway [Microbiology]

05-Jan-2016 | Saneyuki Ujino; Hironori Nishitsuji; Takayuki Hishiki; Kazuo Sugiyama; Hiroshi Takaku; Kunitada Shimotohno, Proceedings of the National Academy of Sciences current issue, 2016

Various host factors are involved in the cellular entry of hepatitis C virus (HCV). In addition to the factors previously reported, we discovered that the very-low-density lipoprotein receptor (VLDLR) mediates HCV entry independent of CD81. Culturing Huh7.5 cells under hypoxic conditions ...

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From convection rolls to finger convection in double-diffusive turbulence [Physics]

05-Jan-2016 | Yantao Yang; Roberto Verzicco; Detlef Lohse, Proceedings of the National Academy of Sciences current issue, 2016

Double-diffusive convection (DDC), which is the buoyancy-driven flow with fluid density depending on two scalar components, is ubiquitous in many natural and engineering environments. Of great interests are scalars' transfer rate and flow structures. Here we systematically investigate DDC flow ...

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Rapid increases in immature synapses parallel estrogen-induced hippocampal learning enhancements [Neuroscience]

29-Dec-2015 | Anna Phan; Sarah Suschkov; Luke Molinaro; Kathryn Reynolds; Jennifer M. Lymer; Craig D. C. Bailey; Lee-Ming Kow; Nei ..., Proceedings of the National Academy of Sciences current issue, 2015

Dramatic increases in hippocampal spine synapse density are known to occur within minutes of estrogen exposure. Until now, it has been assumed that enhanced spinogenesis increased excitatory input received by the CA1 pyramidal neurons, but how this facilitated learning and memory was unclear. ...

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Physics of active jamming during collective cellular motion in a monolayer [Biophysics and Computational Biology]

15-Dec-2015 | Simon Garcia; Edouard Hannezo; Jens Elgeti; Jean-François Joanny; Pascal Silberzan; Nir S. Gov, Proceedings of the National Academy of Sciences current issue, 2015

Although collective cell motion plays an important role, for example during wound healing, embryogenesis, or cancer progression, the fundamental rules governing this motion are still not well understood, in particular at high cell density. We study here the motion of human bronchial epithelial ...

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Networks of military alliances, wars, and international trade [Economic Sciences]

15-Dec-2015 | Matthew O. Jackson; Stephen Nei, Proceedings of the National Academy of Sciences current issue, 2015

We investigate the role of networks of alliances in preventing (multilateral) interstate wars. We first show that, in the absence of international trade, no network of alliances is peaceful and stable. We then show that international trade induces peaceful and stable networks: Trade increases the ...

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Kohn-Sham approach to quantum electrodynamical density-functional theory: Exact time-dependent effective potentials in real space [Applied Physical Sciences]

15-Dec-2015 | Johannes Flick; Michael Ruggenthaler; Heiko Appel; Angel Rubio, Proceedings of the National Academy of Sciences current issue, 2015

The density-functional approach to quantum electrodynamics extends traditional density-functional theory and opens the possibility to describe electron–photon interactions in terms of effective Kohn–Sham potentials. In this work, we numerically construct the exact electron–photon Kohn–Sham ...

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PSD-95 family MAGUKs are essential for anchoring AMPA and NMDA receptor complexes at the postsynaptic density [Neuroscience]

15-Dec-2015 | Xiaobing Chen; Jonathan M. Levy; Austin Hou; Christine Winters; Rita Azzam; Alioscka A. Sousa; Richard D. Leapman; R ..., Proceedings of the National Academy of Sciences current issue, 2015

The postsynaptic density (PSD)-95 family of membrane-associated guanylate kinases (MAGUKs) are major scaffolding proteins at the PSD in glutamatergic excitatory synapses, where they maintain and modulate synaptic strength. How MAGUKs underlie synaptic strength at the molecular level is still not ...

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Upper atmospheric gravity wave details revealed in nightglow satellite imagery [Environmental Sciences]

08-Dec-2015 | Steven D. Miller; William C. Straka III; Jia Yue; Steven M. Smith; M. Joan Alexander; Lars Hoffmann; Martin Setvák; ..., Proceedings of the National Academy of Sciences current issue, 2015

Gravity waves (disturbances to the density structure of the atmosphere whose restoring forces are gravity and buoyancy) comprise the principal form of energy exchange between the lower and upper atmosphere. Wave breaking drives the mean upper atmospheric circulation, determining boundary ...

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