Results 91 to 100 of about 1,619 (156)

Illumination by short-wavelength light inside the blind spot decreases light detectability

iScience
Summary: Although the optic disk corresponding to the blind spot contains no classical photoreceptors, it contains photopigment melanopsin. To clarify whether melanopsin is involved in light detection, we conducted detection tasks for light stimuli ...
Marina Saito, Kentaro Miyamoto, Ikuya Murakami   +2 more
doaj   +1 more source

A climate-sensitive, decision-linked multilayer framework for early warning of harmful cyanobacterial blooms: Sequential cross-layer validation for decision support

Water Research X
Harmful cyanobacterial blooms (CyanoHABs) are intensifying worldwide due to nutrient enrichment, hydrological alteration, and climate-driven extremes, yet freshwater monitoring and early-warning systems remain fragmented, limiting timely and consistent ...
Su-Ok Hwang, Kyung-Hyun Kim, Hyuk Lee, Hans W. Paerl, Baik-Ho Kim   +4 more
doaj   +1 more source

Cone differentiation with no photopigment coexpression.

Investigative ophthalmology & visual science, 2000
To decide whether the transitory coexpression of cone visual pigments described in the developing rat and gerbil retina is a universal feature of dichromatic mammalian species.The rabbit, a species widely used in eye research, was selected for the study and a search made for the presence of cones that bound more than one cone antibody during the first ...
Szepessy Zsuzsanna, Lukáts Ákos, Fekete Tibor, Barsi Árpád, Röhlich Pál, Szél Ágoston   +5 more
openaire   +1 more source

Functional measurements of retinal phototoxicity using photopigment densitometry and adaptive optics

, 2013
Thesis (Ph. D.)--University of Rochester. Institute of Optics, 2013.Recent advances in high-resolution retinal imaging have led to the discovery of retinal changes caused by light exposures below previously published damage thresholds. These effects were
Williams, David R., Masella, Benjamin David (1981 - )   +1 more
core  

Additional file 4 of Beyond Lux: methods for species and photoreceptor-specific quantification of ambient light for mammals

Additional file 4: Supplementary data 2. Supplementary data 2A: Estimation of in vivo spectral sensitivity for each photopigment for each mammalian species. Supplementary data 2B: α-opic efficiency of D65 ( $${K}_{{\alpha },{s},{v}}^{{D}65}$$ K α , s , v
Gatt, Mazie J., Moffatt, Finn, University of Groningen, Woelders, Tom, Notash, Saba, McDowell, Richard J., Lucas, Robert J., Hut lab, Hut, Roelof A., Brown, Timothy M., Didikoglu, Altug, University of Manchester, Izmir Institute of Technology   +12 more
core   +1 more source

Retinal photopigments in the albino rat

The Journal of Physiology, 1957
openaire   +3 more sources

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Photopigments and the Dimensionality of Animal Color Vision

Neuroscience and Biobehavioral Reviews, 2018
Early color-matching studies established that normal human color vision is trichromatic. Subsequent research revealed a causal link between trichromacy and the presence in the retina of three classes of cone photopigments. Over the years, measurements of the photopigment complements of other species have expanded greatly and these are frequently used ...
Gerald H. Jacobs
exaly   +3 more sources

Cone Photopigments in Nocturnal and Diurnal Procyonids

Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 1992
Procyonids are small, New World carnivores distributed among some 6 genera. Electroretinogram (ERG) flicker photometry was used to measure the spectra of the cone photopigments for members of two nocturnal species, the raccoon (Procyon lotor) and the kinkajou (Potos flavus), and a diurnal species, the coati (Nasua nasua).
Gerald H. Jacobs, Jess F Deegan, J F Deegan   +2 more
exaly   +3 more sources

Photopigments and Color Vision in the Nocturnal Monkey,Aotus

Vision Research, 1993
The owl monkey (Aotus trivirgatus) is the only nocturnal monkey. The photopigments of Aotus and the relationship between these photopigments and visual discrimination were examined through (1) an analysis of the flicker photometric electroretinogram (ERG), (2) psychophysical tests of visual sensitivity and color vision, and (3) a search for the ...
Maureen Neitz, Jay Neitz, Gerald H. Jacobs   +2 more
exaly   +3 more sources

Photopigment Optical Density of the Human Foveola and a Paradoxical Senescent Increase Outside the Fovea [PDF]

Visual Neuroscience, 2004
Photopigment optical density (OD) of middle-(M) and long-(L) wavelength-sensitive cones was determined to evaluate the hypothesis that reductions in the amount of photopigment are responsible for age-dependent sensitivity losses of the human cone ...
John S. Werner, Maureen Neitz, Jay Neitz
exaly   +2 more sources