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16,764 Newest Publications in proceedings of the national academy of sciences current issue

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Etiology of distinct membrane excitability in pre- and posthearing auditory neurons relies on activity of Cl- channel TMEM16A [Neuroscience]

24-Feb-2015 | Xiao-Dong Zhang; Jeong-Han Lee; Ping Lv; Wei Chun Chen; Hyo Jeong Kim; Dongguang Wei; Wenying Wang; Choong-Ryoul Sih ..., Proceedings of the National Academy of Sciences current issue, 2015

The developmental rehearsal for the debut of hearing is marked by massive changes in the membrane properties of hair cells (HCs) and spiral ganglion neurons (SGNs). Whereas the underlying mechanisms for the developing HC transition to mature stage are understood in detail, the maturation of SGNs ...

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Warning signals for eruptive events in spreading fires [Physics]

24-Feb-2015 | Jerome M. Fox; George M. Whitesides, Proceedings of the National Academy of Sciences current issue, 2015

Spreading fires are noisy (and potentially chaotic) systems in which transitions in dynamics are notoriously difficult to predict. As flames move through spatially heterogeneous environments, sudden shifts in temperature, wind, or topography can generate combustion instabilities, or trigger ...

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Lack of exercise leads to significant and reversible loss of scale invariance in both aged and young mice [Physiology]

24-Feb-2015 | Changgui Gu; Claudia P. Coomans; Kun Hu; Frank A. J. L. Scheer; H. Eugene Stanley; Johanna H. Meijer, Proceedings of the National Academy of Sciences current issue, 2015

In healthy humans and other animals, behavioral activity exhibits scale invariance over multiple timescales from minutes to 24 h, whereas in aging or diseased conditions, scale invariance is usually reduced significantly. Accordingly, scale invariance can be a potential marker for health. Given ...

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Coincidence avoidance principle in surface haptic interpretation [Psychological and Cognitive Sciences]

24-Feb-2015 | Steven G. Manuel; Roberta L. Klatzky; Michael A. Peshkin; James Edward Colgate, Proceedings of the National Academy of Sciences current issue, 2015

When multiple fingertips experience force sensations, how does the brain interpret the combined sensation? In particular, under what conditions are the sensations perceived as separate or, alternatively, as an integrated whole? In this work, we used a custom force-feedback device to display force ...

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Classification of charge density waves based on their nature [Physics]

24-Feb-2015 | Xuetao Zhu; Yanwei Cao; Jiandi Zhang; E. W. Plummer; Jiandong Guo, Proceedings of the National Academy of Sciences current issue, 2015

The concept of a charge density wave (CDW) permeates much of condensed matter physics and chemistry. CDWs have their origin rooted in the instability of a one-dimensional system described by Peierls. The extension of this concept to reduced dimensional systems has led to the concept of Fermi ...

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Widespread pollution of the South American atmosphere predates the industrial revolution by 240 y [Earth, Atmospheric, and Planetary Sciences]

24-Feb-2015 | Chiara Uglietti; Paolo Gabrielli; Colin A. Cooke; Paul Vallelonga; Lonnie G. Thompson, Proceedings of the National Academy of Sciences current issue, 2015

In the Southern Hemisphere, evidence for preindustrial atmospheric pollution is restricted to a few geological archives of low temporal resolution that record trace element deposition originating from past mining and metallurgical operations in South America. Therefore, the timing and the spatial ...

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Critical and maximally informative encoding between neural populations in the retina [Physics]

24-Feb-2015 | David B. Kastner; Stephen A. Baccus; Tatyana O. Sharpee, Proceedings of the National Academy of Sciences current issue, 2015

Computation in the brain involves multiple types of neurons, yet the organizing principles for how these neurons work together remain unclear. Information theory has offered explanations for how different types of neurons can maximize the transmitted information by encoding different stimulus ...

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Highly efficient conversion of superoxide to oxygen using hydrophilic carbon clusters [Chemistry]

24-Feb-2015 | Errol L. G. Samuel; Daniela C. Marcano; Vladimir Berka; Brittany R. Bitner; Gang Wu; Austin Potter; Roderic H. Fabia ..., Proceedings of the National Academy of Sciences current issue, 2015

Many diseases are associated with oxidative stress, which occurs when the production of reactive oxygen species (ROS) overwhelms the scavenging ability of an organism. Here, we evaluated the carbon nanoparticle antioxidant properties of poly(ethylene glycolated) hydrophilic carbon clusters ...

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Role of dairy in the carbon footprint of US beef [Physical Sciences]

24-Feb-2015 | Nicole Tichenor, Proceedings of the National Academy of Sciences current issue, 2015

In PNAS, Eshel et al. (1) present a novel methodology for calculating a suite of ecological impacts from livestock and poultry production in the United States. The authors acknowledge two complementary and valuable approaches in ecological accounting: bottom up and top down. Top-down analyses, ...

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Feedback stabilizes propagation of synchronous spiking in cortical neural networks [Neuroscience]

24-Feb-2015 | Samat Moldakarimov; Maxim Bazhenov; Terrence J. Sejnowski, Proceedings of the National Academy of Sciences current issue, 2015

Precisely timed action potentials related to stimuli and behavior have been observed in the cerebral cortex. However, information carried by the precise spike timing has to propagate through many cortical areas, and noise could disrupt millisecond precision during the transmission. Previous ...

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