Results 61 to 70 of about 43,246 (307)

Termorretificação e colorimetria da madeira de Eucalyptus grandis

open access: yesFloresta e Ambiente
A termorretificação pode ser utilizada na alteração da cor da madeira, tornado-a semelhante às madeiras tropicais de maior valor agregado. O objetivo deste trabalho foi avaliar as alterações colorimétricas na madeira de Eucalyptus grandis submetida a 140,
Antônio José Vinha Zanuncio   +2 more
doaj   +1 more source

An investigation of 3D images of the simultaneous-lightness-contrast illusion using a virtual-reality technique [PDF]

open access: yesPsychology in Russia: State of Art, 2013
This article investigates the problem of lightness perception. To clarify the role of depth in lightness perception two current models—the albedo hypothesis and the coplanar-ratio hypothesis—are discussed. To compare them the strength of the simultaneous-
Menshikova, G.Ya.
doaj   +1 more source

Biophysical approaches for studying viral entry

open access: yesFEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

Neuronal population mechanisms of lightness perception

open access: yes, 2018
The way that humans and animals perceive the lightness of an object depends on its physical luminance as well as its surrounding context. While neuronal responses throughout the visual pathway are modulated by context, the relationship between neuronal ...
David H. Brainard   +2 more
core   +1 more source

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

Rab14 regulates the transport of human papillomavirus to the trans‐Golgi network for infectious cell entry

open access: yesFEBS Letters, EarlyView.
This study reveals that the small GTPase Rab14 is necessary for human papillomavirus (HPV) infection and plays an essential role in the transport of virions to the trans‐Golgi network (TGN). HPV in the early endosome (EE), which harbors GTP‐bound Rab14, is transported to the TGN through the switch of Rab14 from its GTP‐bound to GDP‐bound form.
Yoshiyuki Ishii, Iwao Kukimoto
wiley   +1 more source

Does luminance contrast determine lightness?

open access: yes, 2005
When presented against a highly lit black background, dimly illuminated white paper strips appear white even when they are equiluminant with the background.
Logvinenko, Alexander D.
core   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

open access: yesFEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto   +3 more
wiley   +1 more source

Regression Approach in the Evaluation of White’s Effect Magnitude in Comparison to Lightness

open access: yesTehnički Glasnik
In the achromatic White's grid, the grey patches between the grey lines are perceived as darker while the same elements inserted between white lines are perceived lighter than their true measured values.
Ivan Budimir   +3 more
doaj   +1 more source

Visual computation of surface lightness: Local contrast vs. frames of reference

open access: yes, 2010
Seeing black, white and gray surfaces, called lightness perception, might seem simple because white surfaces reflect 90% of the light they receive while black surfaces reflect only 3%, and the human retina is composed of light sensitive cells.
Alan Gilchrist, Ana Radonjic
core  

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