Results 31 to 40 of about 8,717 (203)

Randomized trial of polychromatic blue-enriched light for circadian phase shifting, melatonin suppression, and alerting responses. [PDF]

open access: yes, 2019
Wavelength comparisons have indicated that circadian phase-shifting and enhancement of subjective and EEG-correlates of alertness have a higher sensitivity to short wavelength visible light.
Ayers, M.   +12 more
core   +2 more sources

A two-step method for identifying photopigment opsin and rhodopsin gene sequences underlying human color vision phenotypes. [PDF]

open access: yes, 2020
PurposeTo present a detailed, reliable long range-PCR and sequencing (LR-PCR-Seq) procedure to identify human opsin gene sequences for variations in the long wavelength-sensitive (OPN1LW), medium wavelength-sensitive (OPN1MW), short wavelength-sensitive (
Atilano, Shari R   +3 more
core   +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

An Evaluation of a Battery of Functional and Structural Tests as Predictors of Likely Risk of Progression of Age-Related Macular Degeneration. [PDF]

open access: yes, 2018
Purpose: To evaluate the ability of visual function and structural tests to identify the likely risk of progression from early/intermediate to advanced AMD, using the Age-Related Eye Disease Study (AREDS) simplified scale as a surrogate for risk of ...
Bailey, C.   +3 more
core   +3 more sources

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

Light intensity defines growth and photopigment content of a mixed culture of purple phototrophic bacteria

open access: yesFrontiers in Microbiology, 2022
Purple bacteria (PPB), anoxygenic photoorganoheterotrophic organisms with a hyper-versatile metabolism and high biomass yields over substrate, are promising candidates for the recovery of nutrient resources from wastewater.
Marta Cerruti   +4 more
doaj   +1 more source

A perspective on color vision in platyrrhine monkeys [PDF]

open access: yes, 1960
Studies carried out over the past two decades show that many platyrrhine (New World) monkeys have polymorphic color vision. This condition results from the sorting of allelic versions of X-chromosome cone opsin genes at a single gene site, yielding a ...
Gerald H Jacobs   +61 more
core   +3 more sources

A diver-operated hyperspectral imaging and topographic surveying system for automated mapping of benthic habitats

open access: yesScientific Reports, 2017
We developed a novel integrated technology for diver-operated surveying of shallow marine ecosystems. The HyperDiver system captures rich multifaceted data in each transect: hyperspectral and color imagery, topographic profiles, incident irradiance and ...
Arjun Chennu   +4 more
doaj   +1 more source

Spatial summation of individual cones in human color vision. [PDF]

open access: yes, 2019
The human retina contains three classes of cone photoreceptors each sensitive to different portions of the visual spectrum: long (L), medium (M) and short (S) wavelengths. Color information is computed by downstream neurons that compare relative activity
Boehm, Alexandra   +3 more
core   +1 more source

Home - About - Disclaimer - Privacy