Results 31 to 40 of about 3,923 (179)
Zebrafish Circadian Clock Entrainment and the Importance of Broad Spectral Light Sensitivity
Frontiers in Physiology, 2020 One of the key defining features of an endogenous circadian clock is that it can be entrained or set to local time. Though a number of cues can perform this role, light is the predominant environmental signal that acts to entrain circadian pacemakers in ...
Inga A. Frøland Steindal +2 more
doaj +1 more source
Photochemistry and Photobiology, EarlyView.The left panel reports the measured time course data of melatonin concentration in the blood plasma of 17 BL‐Rs and 15 BL‐NRs at baseline, during a two‐hour stay in the dark, during a one‐hour light exposure to blue light, and again in the dark. The right panel shows the magnitude of melatonin concentration after 60 min of exposure to warm white, cool ...
Helmut Piazena +4 more
wiley +1 more source
A field-deployable and handheld fluorometer for environmental water quality monitoring
Micro and Nano Systems Letters, 2018 This work reports the development of a field-deployable and fully handheld fluorometer for environmental water monitoring. Our developed fluorimeter can detect both green algae and cyanobacteria (blue-green algae) while simultaneously differentiating and
Young-Ho Shin +2 more
doaj +1 more source
PLoS Biology, 2015 Circadian rhythms are an essential property of life on Earth. In mammals, these rhythms are coordinated by a small set of neurons, located in the suprachiasmatic nuclei (SCN).
Hester C van Diepen +2 more
doaj +1 more source
Retention of the Full Visual Opsin Repertoire in Some Australian Cryptozoic Lizards
Ecology and Evolution, Volume 16, Issue 6, June 2026.This study investigates the link between visual evolution and fossorial habits in the endemic Australian skink genus Lerista. We provide evidence for positive site‐specific selection in all 4 cone opsins, as well as relaxed selection specific to LWS. We also provide evidence of selection linked to limb reduction, an indicator of fossorial adaptation ...
Matthew J. R. Ford +5 more
wiley +1 more source
Characterization of the melanopsin gene (Opn4x) of diurnal and nocturnal snakes
BMC Evolutionary Biology, 2019 Background A number of non-visual responses to light in vertebrates, such as circadian rhythm control and pupillary light reflex, are mediated by melanopsins, G-protein coupled membrane receptors, conjugated to a retinal chromophore.
Einat Hauzman +3 more
doaj +1 more source
Ecophysiological and biochemical traits of three herbaceous plants growing on the disposed coal combustion fly ash of different weathering stage [PDF]
Archives of Biological Sciences, 2013 The ecophysiological and biochemical traits of Calamagrostis epigejos (Roth.) Festuca rubra L. and Oenothera biennis L. growing on two fly ash lagoons of different weathering stage (L1-3 years and L2-11 years) of the “Nikola Tesla- A ...
Gajić Gordana +6 more
doaj +1 more source
Widespread Variation in Retinochrome Spectral Absorbance Across Scallop Phylogeny
Molecular Ecology, Volume 35, Issue 11, June 2026.ABSTRACT Vision is a two‐step process, including phototransduction initiated by a retinal‐bound opsin photopigment, and subsequent photopigment regeneration wherein the inactive state is restored. Because retinal isomerization, or changing of the molecular structural conformation, drives the activation of opsin photopigments, the reverse process is a ...
Kyle E. McElroy +3 more
wiley +1 more source
Black in Impressionism and Post‐Impressionism: Art, Color Vision, and Psychophysics
Color Research &Application, Volume 51, Issue 3, May/June 2026.Black has engendered controversy in 19th Century color theory and in Impressionist and Post‐Impresssionist painting. The neural mechanisms of blackness perception are being revealed through contemporary psychophysics. ABSTRACT From Paleolithic cave art to modern abstraction, artists have used black not merely as a neutral tone, but as a powerful ...
John S. Werner
wiley +1 more source
Photoentrainment and Photopigments
Revista da Biologia, 2018 O arrastamento fótico é garantido pela ação de proteínas fotorreceptoras, que possuem propriedades muito particulares. Dentre as diversas proteínas fotossensíveis que surgiram ao longo do processo evolutivo, apenas algumas participam do arrastamento fótico.
openaire +1 more source