News tagged with circadian rhythms
Examining evolution from a cellular perspective
The evolutionary processes of unicellular and multicellular organisms are continually under debate. John Torday, Ph.D., a lead investigator at Los Angeles Biomedical Research Institute (LA BioMed), has recently co-authored ...
Jan 25, 2012 |
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Researchers identify structure of circadian clock protein
(PhysOrg.com) -- Feeling jet-lagged? You may need your internal clock reset. New Cornell research has taken a major step toward treating jet lag and other more serious syndromes by advancing our understanding ...
Nov 15, 2011 |
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Research team shows skin stem cells run by circadian clock
(PhysOrg.com) -- Most everyone has heard of the circadian rhythm or the internal clock that people have that tells them when to do things, such as go to sleep. In fact, researchers have actually located where this “clock” ...
Nov 10, 2011 |
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Glowing, blinking bacteria reveal how cells synchronize biological clocks
Biologists have long known that organisms from bacteria to humans use the 24 hour cycle of light and darkness to set their biological clocks. But exactly how these clocks are synchronized at the molecular level to perform ...
Sep 01, 2011 |
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Finding mechanism behind bacteria's biological clock
(PhysOrg.com) -- A discovery by a professor at the University of California, Merced, is providing a deeper understanding of the factors that control biological clocks.
Aug 31, 2011 |
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Repairing our inner clock with a two-inch fish
Circadian rhythms — the natural cycle that dictates our biological processes over a 24-hour day — does more than tell us when to sleep or wake. Disruptions in the cycle are also associated with depression, problems ...
Jul 21, 2011 |
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Biologists discover an 'evening' protein complex that regulates plant growth
Farmers and other astute observers of nature have long known that crops like corn and sorghum grow taller at night. But the biochemical mechanisms that control this nightly stem elongation, common to most plants, have been ...
Jul 13, 2011 |
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'Wrong'-time eating reduces fertility in fruit flies
Dieticians will tell you it isn't healthy to eat late at night: it's a recipe for weight gain. In fruit flies, at least, there's another consequence: reduced fertility.
Jun 07, 2011 |
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Video gaming teens sleep less: study
Teens who play a lot of video games are likely to sleep less than the eight to nine hours a night recommended for the age group, researchers said Monday.
May 16, 2011 |
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Experimental work proves theory that circadian body clock requires delay to function properly
For more than 20 years, theoretical mathematical models have predicted that a delay built into a negative feedback system is at the heart of the molecular mechanism that governs circadian clocks in mammalian ...
Mar 25, 2011 |
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'Round-the-clock' lifestyle can disrupt metabolism, brain and behavior
(PhysOrg.com) -- In Civilization and Its Discontents, Sigmund Freud argued that modern society was hard on human psychology, forcing people to get along in unnaturally close quarters. Now newly published resear ...
Medicine & Health / Medical research
Feb 21, 2011 |
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SAD affects many through winter months
For many, the changing of the seasons means cozy dark evenings of winter and enjoying holiday light displays. But perhaps for you, the shortening of the days signals a time when you feel down, sad or withdrawn. You may notice ...
Medicine & Health / Psychology & Psychiatry
Feb 18, 2011 |
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Analysis of bread mold genomes demos 'reverse-ecology' tool
In a demonstration of "reverse-ecology," biologists at the University of California, Berkeley, have shown that one can determine an organism's adaptive traits by looking first at its genome and checking for ...
Jan 31, 2011 |
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Researchers apply fatigue model to fatal commuter air crash
Washington State University sleep researchers have determined that the air traffic controller in the crash of a Lexington, Ky., commuter flight was substantially fatigued when he failed to detect that the plane was on the ...
Other Sciences / Social Sciences
Jan 20, 2011 |
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Corals and humans have much in common, researchers find
(PhysOrg.com) -- An international team of Australian and Israeli coral geneticists, including scientists from University of Queensland, has found that corals, among the simplest of Earth's creatures, have some curiously human-like ...
Jan 20, 2011 |
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Circadian rhythm
A circadian rhythm is a roughly-24-hour cycle in the biochemical, physiological or behavioral processes of living entities, including plants, animals, fungi and cyanobacteria (see bacterial circadian rhythms). The term "circadian", coined by Franz Halberg, comes from the Latin circa, "around," and diem or dies, "day", meaning literally "approximately one day." The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms, is called chronobiology.
Circadian rhythms are endogenously generated, and can be entrained by external cues, called Zeitgebers, the primary one of which is daylight. These rhythms allow organisms to anticipate and prepare for precise and regular environmental changes.
For more information about Circadian rhythm, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
