Results 251 to 260 of about 238,540 (305)

Synaptotagmin: Mechanisms of an electrostatic switch

Neuroscience Letters, 2020
Synaptic transmission relies on the fast, synchronous fusion of neurotransmitter filled vesicles with the presynaptic membrane. Synaptotagmin is the Ca2+ sensor that couples the Ca2+ influx into nerve terminals following an action potential with this fast, synchronous vesicle fusion. Over two decades of synaptotagmin research has provided many clues as
Matthew R. Bowers, Noreen E. Reist
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A mechanism for efficient context switching

[1991 Proceedings] IEEE International Conference on Computer Design: VLSI in Computers and Processors, 2002
Context switches are slow in conventional processors because the entire processor state must be saved and restored, even if much of the restored state is not used before the next context switch. This unnecessary data movement is required because of the coarse granularity of binding between names and registers.
Peter R. Nuth, William J. Dally
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Mechanical Control of Electroresistive Switching

Nano Letters, 2013
Hysteretic metal-insulator transitions (MIT) mediated by ionic dynamics or ferroic phase transitions underpin emergent applications for nonvolatile memories and logic devices. The vast majority of applications and studies have explored the MIT coupled to the electric field or temperarture.
Yunseok, Kim, Simon J, Kelly, Anna, Morozovska, Ehsan Kabiri, Rahani, Evgheni, Strelcov, Eugene, Eliseev, Stephen, Jesse, Michael D, Biegalski, Nina, Balke, Nicole, Benedek, Dmitri, Strukov, J, Aarts, Inrok, Hwang, Sungtaek, Oh, Jin Sik, Choi, Taekjib, Choi, Bae Ho, Park, Vivek B, Shenoy, Peter, Maksymovych, Sergei V, Kalinin   +19 more
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Intrinsic Mechanisms of Memristive Switching

Nano Letters, 2011
Resistive switching (RS) memory effect in metal-oxide-metal junctions is a fascinating phenomenon toward next-generation universal nonvolatile memories. However the lack of understanding the electrical nature of RS has held back the applications. Here we demonstrate the electrical nature of bipolar RS in cobalt oxides, such as the conduction mechanism ...
Kazuki, Nagashima, Takeshi, Yanagida, Keisuke, Oka, Masaki, Kanai, Annop, Klamchuen, Jin-Soo, Kim, Bae Ho, Park, Tomoji, Kawai   +7 more
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Mechanisms of behavioral switching

Journal of Comparative Physiology A, 2004
No animal performs only one behavior, so nervous systems must have ways to switch between different behaviors. In this issue of Journal of Comparative Physiology A, several papers discuss how nervous systems achieve this ordered switching between behaviors, from short-term motor control problems, to medium-term decision making based on past experience,
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Molecular mechanisms of hemoglobin switching

The International Journal of Biochemistry & Cell Biology, 1996
The developmental regulation of the human beta-globin cluster embodies all aspects of transcriptional control of eukaryotic genes. The cis-acting sequences within the cluster, distal regulatory regions and trans-acting factors all contribute to provide stringent temporal and tissue-specific expression. This review will examine the individual regulatory
S M, Jane, J M, Cunningham
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The Microscopic Switching Mechanism of a [2]Catenane

The Journal of Physical Chemistry B, 2005
We apply numerical simulations at an all-atom level to investigate the switching mechanism of a [2]catenane, a prototype of a molecular machine. This system is able to switch reversibly between two different stable states, upon external stimuli, with a time scale ranging from microseconds up to milliseconds, well over the typical domain of molecular ...
CECCARELLI, MATTEO, F. MERCURI, D. PASSERONE, M. PARRINELLO   +3 more
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Computational and neural mechanisms of task switching

Neurocomputing, 2006
Switching between tasks that overlap in perceptual and response characteristics is assumed to rely upon the maintenance of task representations in prefrontal cortex (PFC). However, task-switching studies demonstrate "switch costs," even when there is sufficient time to prepare for a new task. These costs suggest that task-switching performance reflects
Jeremy R. Reynolds, Todd S. Braver, Joshua W. Brown, Stefan Van der Stigchel   +3 more
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Mechanical Switches of Fluorescence

Journal of inclusion phenomena and macrocyclic chemistry, 2001
Fluorescence switches are molecular systems containing a light-emitting fragment whose activity can be quenched/revived reversibly, at will,through an external parameter, i.e., a change of pH or the variation of the redox potential.Fluorescence switches can be static (the emission of the fluorophore isswitched ON/OFF by a bistable covalently linked ...
AMENDOLA, VALERIA, DI CASA, MICHELINA, FABBRIZZI, LUIGI, LICCHELLI, MAURIZIO, MANGANO, CARLO PAOLO, PALLAVICINI, PIERSANDRO, POGGI, ANTONIO   +6 more
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The study of molecular switching mechanisms

Life Sciences, 1978
Abstract High resolution NMR studies of proteins reveal differences in mobility in different segments and side chains. These differences in mobility may be related to those features of the protein structure which are important in the function of these proteins as regulatory units--switches or transducers.
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