نتایج جستجو برای: crowding stress

تعداد نتایج: 445068  

Journal: :Journal of vision 2016
Yetta Kwailing Wong Alan C-N Wong

Crowding refers to the disrupted recognition of an object by nearby distractors. Prior work has shown that real-world music-reading experts experience reduced crowding specifically for musical stimuli. However, it is unclear whether music-reading training reduced the magnitude of crowding or whether individuals showing less crowding are more likely to learn and excel in music reading later. To ...

Journal: :Biophysical journal 2009
Dirar Homouz Loren Stagg Pernilla Wittung-Stafshede Margaret S Cheung

Protein dynamics in cells may be different from those in dilute solutions in vitro, because the environment in cells is highly concentrated with other macromolecules. This volume exclusion because of macromolecular crowding is predicted to affect both equilibrium and kinetic processes involving protein conformational changes. To quantify macromolecular crowding effects on protein folding mechan...

Journal: :Biophysical journal 2014
Ianire Martín Garbiñe Celaya Carlos Alfonso Fernando Moro Germán Rivas Arturo Muga

Reactivation of intracellular protein aggregates after a severe stress is mandatory for cell survival. In bacteria, this activity depends on the collaboration between the DnaK system and ClpB, which in vivo occurs in a highly crowded environment. The reactivation reaction includes two steps: extraction of unfolded monomers from the aggregate and their subsequent refolding into the native confor...

Journal: :The Journal of chemical physics 2016
Nobu C Shirai Macoto Kikuchi

α-synuclein (α-syn) is an intrinsically disordered protein which is considered to be one of the causes of Parkinson's disease. This protein forms amyloid fibrils when in a highly concentrated solution. The fibril formation of α-syn is induced not only by increases in α-syn concentration but also by macromolecular crowding. In order to investigate the coupled effect of the intrinsic disorder of ...

Journal: :Biological & pharmaceutical bulletin 2003
Hitoshi Ishida Katsukuni Mitsui Haruo Nukaya Katsuo Matsumoto Kuniro Tsuji

The effects of five levels of population density on various organs, the neuroendocrine system, skin function, skin blood perfusion, and blood parameters were studied in the hairless mouse. Skin barrier recovery was evaluated by measuring transepidermal water loss after tape stripping. Blood perfusion was measured by means of a laser Doppler imaging technique. The effect of a parasympathetic ner...

2017
J. Laureano Phillips Bradford E. Jackson Elizabeth L. Fagan Steven E. Arze Brenton Major Nestor R. Zenarosa Hao Wang

BACKGROUND Crowding occurs commonly in high volume emergency departments (ED) and has been associated with negative patient care outcomes. We aim to assess ED crowding in a median-low volume setting and evaluate associations with patient care outcomes. METHODS This was a prospective single-center study from November 14, 2016 until December 14, 2016. ED crowding was measured every 2 h by three...

Journal: :Evolutionary computation 2008
Ole J. Mengshoel David E. Goldberg

A wide range of niching techniques have been investigated in evolutionary and genetic algorithms. In this article, we focus on niching using crowding techniques in the context of what we call local tournament algorithms. In addition to deterministic and probabilistic crowding, the family of local tournament algorithms includes the Metropolis algorithm, simulated annealing, restricted tournament...

Journal: :Perception 2015
Ruth Kimchi Yossef Pirkner

In crowding, identification of a peripheral target in the presence of nearby flankers is worse than when the target appears alone. Prevailing theories hold that crowding occurs because of integration or "pooling" of low-level features at a single, relatively early stage of visual processing. Recent studies suggest that crowding can occur also between high-level object representations. The most ...

Journal: :Journal of vision 2017
Leo Yuk Ting Cheung Sing-Hang Cheung

Crowding impedes the identification of flanked objects in peripheral vision. Prior studies have shown crowding strength decreases with target-flanker similarity. Research on crowding in Chinese-character recognition has been scarce in the literature. We aimed to fill the research gap by examining the effects of structural similarity on Chinese-character crowding. Regularity in within-character ...

Journal: :Journal of vision 2007
Anirvan S Nandy Bosco S Tjan

Visual crowding refers to the marked inability to identify an otherwise perfectly identifiable object when it is flanked by other objects. Crowding places a significant limit on form vision in the visual periphery; its mechanism is, however, unknown. Building on the method of signal-clamped classification images (Tjan & Nandy, 2006), we developed a series of first- and second-order classificati...

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