Results 41 to 50 of about 1,727,476 (300)

Illuminating the deleterious effects of light at night [PDF]

F1000 Medicine Reports, 2011
Technological advances, while providing many benefits, often create circumstances that differ from the conditions in which we evolved. With the wide-spread adoption of electrical lighting during the 20(th) century, humans became exposed to bright and unnatural light at night for the first time in their evolutionary history.
Fonken, Laura K., Nelson, Randy J.
openaire   +2 more sources

Mapping the Melatonin Suppression, Star Light and Induced Photosynthesis Indices with the LANcube

Remote Sensing, 2020
Increased exposure to artificial light at night can affect human health including disruption of melatonin production and circadian rhythms which can extend to increased risks of hormonal cancers and other serious diseases.
Martin Aubé, Charles Marseille, Amar Farkouh, Adam Dufour, Alexandre Simoneau, Jaime Zamorano, Johanne Roby, Carlos Tapia   +7 more
doaj   +1 more source

Exposure to a nocturnal light pulse simultaneously and differentially affects stridulation and locomotion behaviors in crickets

Frontiers in Physiology, 2023
It is crucial for living organisms to be in synchrony with their environment and to anticipate circadian and annual changes. The circadian clock is responsible for entraining organisms’ activity to the day-night rhythmicity.
Keren Levy, Anat Barnea, Amir Ayali, Amir Ayali   +3 more
doaj   +1 more source

Artificial light at night: a global disruptor of the night-time environment

Philosophical Transactions of the Royal Society B: Biological Sciences, 2023
Light pollution is the alteration of the natural levels of darkness by an increased concentration of light particles in the night-time environment, resulting from human activity. Light pollution is profoundly changing the night-time environmental conditions across wide areas of the planet, and is a relevant stressor whose effects on life are being ...
Salvador Bará, Fabio Falchi
openaire   +3 more sources

XMM-Newton observations of UW CrB -- detection of X-ray bursts and evidence for accretion disc evolution

, 2004
UW CrB (MS1603+2600) is a peculiar short period X-ray binary that exhibits extraordinary optical behaviour. The optical light curve shape of the system changes drastically from night to night, without any changes in overall brightness.
Callanan, Diana Hannikainen, Ergma, Gavin Ramsay, Hakala, Hellier, Homer, Hynes, Ilovaisky, Jimenez-Garate, Jonker, Ko, Koji Mukai, Lewin, Mason, Morris, Muhli, Mukai, Ogilvie, Osmi Vilhu, Panu Muhli, Pasi Hakala, Phil Charles, Pringle, Schandl   +24 more
core   +1 more source

Spatial sensitivity of human circadian response: Melatonin suppression from on-axis and off-axis light exposures

Neurobiology of Sleep and Circadian Rhythms, 2021
A better understanding of the spatial sensitivity of the human circadian system to photic stimulation can provide practical solutions for optimized circadian light exposures. Two psychophysical experiments, involving 25 adult participants in Experiment 1
Rohan Nagare, Mark S. Rea, Mariana G. Figueiro   +2 more
doaj   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Light-at-night, cancer and aging

Aging, 2010
Recently, the International Agency for Research on Cancer (IARC) concluded that "shift-work that involves circadian disruption is probably carcinogenic to humans" [1]. This conclusion was based upon limited evidence in humans [2,3] and sufficient evidence in experimental animals [4,5]. The current experimental results of Vinogradova and colleagues from
openaire   +2 more sources

The First Detections of the Extragalactic Background Light at 3000, 5500, and 8000A (II): Measurement of Foreground Zodiacal Light [PDF]

, 2001
We present a measurement of the absolute surface brightness of the zodiacal light (3900-5100A) toward a fixed extragalactic target at high ecliptic latitude based on moderate resolution (~1.3A per pixel) spectrophotometry obtained with the du Pont 2.5m ...
Baldwin J. H., Barry F. Madore, Beggs D. W., Dave J. V., de Bary E., de Bary E., Deepak A., Dumont R., East I. R., Elterman L., Frey A., Green A. E. S., Leinert Ch., Levasseur-Regourd A. C., Mattila K., Mattila K., Neckel Th., Neckel Th., Reach W. T., Rebecca A. Bernstein, Richter I., Roser S., Schiffer R., Slanger T. G., Staude H. J., Stone R. P. S., van Rhijn P. J., Weinberg J. L., Weiss-Wrana K., Wendy L. Freedman   +29 more
core   +2 more sources

The role and implications of mammalian cellular circadian entrainment

FEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source