News tagged with circadian clock
Group finds circadian clock common to almost all life forms
(Phys.org) -- A group of biology researchers, led by Akhilesh Reddy from Cambridge University have found an enzyme that they believe serves as a circadian clock that operates in virtually all forms of life. ...
May 17, 2012 |
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Ancient body clock discovered that helps to keep all living things on time
The mechanism that controls the internal 24-hour clock of all forms of life from human cells to algae has been identified by scientists.
Jan 26, 2011 |
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New chemical may lead to jet lag drug
(PhysOrg.com) -- Jet lag, as every long-distance airline passenger knows, disrupts the body's normal circadian rhythms, or body clocks, and causes some very unpleasant effects such as disturbed sleep and fatigue. ...
Dec 16, 2010 |
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New pattern in our biological clock overturns long-held theory
(PhysOrg.com) -- University of Michigan mathematicians and their British colleagues say they have identified the signal that the brain sends to the rest of the body to control biological rhythms, a finding that overturns ...
Medicine & Health / Medical research
Oct 08, 2009 |
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Migrating monarch butterflies 'nose' their way to Mexico
The annual migration of monarch butterflies from across eastern North America to a specific grove of fir trees in Mexico has long fascinated scientists who have sought to understand just how these delicate ...
Sep 24, 2009 |
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Scientists Discover Hunger's Timekeeper
(PhysOrg.com) -- Researchers at Columbia and Rockefeller Universities have identified cells in the stomach that regulate the release of a hormone associated with appetite. The group is the first to show that ...
Medicine & Health / Medical research
Aug 28, 2009 |
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A Biological Basis for the 8-Hour Workday? Researchers uncover 8- and 12-hour Cycles of Gene Activity
(PhysOrg.com) -- The circadian clock coordinates physiological and behavioral processes on a 24-hour rhythm, allowing animals to anticipate changes in their environment and prepare accordingly. Scientists ...
Apr 22, 2009 |
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Scientists model 3D structures of proteins that control human clock
In an Early Edition issue of The Proceedings of the National Academy of Sciences (PNAS) on April 9, 2009, the researchers report that they have been able to determine the molecular structure of a plant photolyase protein that ...
Apr 11, 2009 |
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It's in the genes: Research pinpoints how plants know when to flower
Scientists believe they've pinpointed the last crucial piece of the 80-year-old puzzle of how plants "know" when to flower.
May 25, 2012 |
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Plants use circadian rhythms to prepare for battle with insects
In a study of the molecular underpinnings of plants' pest resistance, Rice University biologists have shown that plants both anticipate daytime raids by hungry insects and make sophisticated preparations to ...
Feb 13, 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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Differences in jet lag severity could be rooted in how circadian clock sets itself
It's no secret that long-distance, west-to-east air travel – Seattle to Paris, for example – can raise havoc with a person's sleep and waking patterns, and that the effects are substantially less pronounced when ...
Oct 13, 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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Manipulating plants' circadian clock may make all-season crops possible
Yale University researchers have identified a key genetic gear that keeps the circadian clock of plants ticking, a finding that could have broad implications for global agriculture.
Sep 01, 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.
