Results 11 to 20 of about 3,923 (179)

An EvoDevo Study of Salmonid Visual Opsin Dynamics and Photopigment Spectral Sensitivity

open access: yesFrontiers in Neuroanatomy, 2022
Salmonids are ideal models as many species follow a distinct developmental program from demersal eggs and a large yolk sac to hatching at an advanced developmental stage. Further, these economically important teleosts inhabit both marine- and freshwaters
Mariann Eilertsen   +12 more
doaj   +1 more source

The Diversity and Adaptive Evolution of Visual Photopigments in Reptiles

open access: yesFrontiers in Ecology and Evolution, 2019
Reptiles are a highly diverse class that consists of snakes, geckos, iguanid lizards, and chameleons among others. Given their unique phylogenetic position in relation to both birds and mammals, reptiles are interesting animal models with which to ...
Christiana Katti   +7 more
doaj   +1 more source

Extraocular, rod-like photoreceptors in a flatworm express xenopsin photopigment

open access: yeseLife, 2019
Animals detect light using opsin photopigments. Xenopsin, a recently classified subtype of opsin, challenges our views on opsin and photoreceptor evolution.
Kate A Rawlinson   +14 more
doaj   +1 more source

Profiles of Rho, Opn4, c-Fos, and Birc5 mRNA expression in Wistar rat retinas exposed to white or monochromatic light

open access: yesFrontiers in Neuroanatomy, 2022
Despite concern over potential retinal damage linked to exposure to light-emitting-diode (LED) light (particularly blue light), it remains unknown how exposure to low-intensity monochromatic LED light affects the expression of rhodopsin (Rho, a ...
Natalia Ziółkowska, Bogdan Lewczuk
doaj   +1 more source

Diversity of color vision: not all Australian marsupials are trichromatic. [PDF]

open access: yesPLoS ONE, 2010
Color vision in marsupials has recently emerged as a particularly interesting case among mammals. It appears that there are both dichromats and trichromats among closely related species.
Wiebke Ebeling   +2 more
doaj   +1 more source

Melanopsin bistability: a fly's eye technology in the human retina.

open access: yesPLoS ONE, 2009
In addition to rods and cones, the human retina contains light-sensitive ganglion cells that express melanopsin, a photopigment with signal transduction mechanisms similar to that of invertebrate rhabdomeric photopigments (IRP).
Ludovic S Mure   +6 more
doaj   +1 more source

Melanopsin expression in the retinas of owls with different daily activity patterns

open access: yesJournal of Photochemistry and Photobiology, 2022
Melanopsin is a photopigment found in a subset of retinal ganglion cells that is responsible for generating a series of responses to light in organisms, such as circadian rhythm regulation, pupillary light reflex, and body temperature control.
Maria Júlia Vilani Naman   +6 more
doaj   +1 more source

Optical imaging of human cone photoreceptors directly following the capture of light. [PDF]

open access: yesPLoS ONE, 2013
Capture of light in the photoreceptor outer segment initiates a cascade of chemical events that inhibit neurotransmitter release, ultimately resulting in vision.
Phillip Bedggood, Andrew Metha
doaj   +1 more source

Nanobioarchitectures based on chlorophyll photopigment, artificial lipid bilayers and carbon nanotubes

open access: yesBeilstein Journal of Nanotechnology, 2014
In the last decade, building biohybrid materials has gained considerable interest in the field of nanotechnology. This paper describes an original design for bionanoarchitectures with interesting properties and potential bioapplications.
Marcela Elisabeta Barbinta-Patrascu   +4 more
doaj   +1 more source

Characterizing the Human Cone Photoreceptor Mosaic via Dynamic Photopigment Densitometry.

open access: yesPLoS ONE, 2015
Densitometry is a powerful tool for the biophysical assessment of the retina. Until recently, this was restricted to bulk spatial scales in living humans.
Ramkumar Sabesan   +2 more
doaj   +1 more source

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