News tagged with internal clock
Darpa chip-scale atomic clocks aboard International Space Station
Atomic clocks are the most accurate frequency standard and timing devices in the world. Their range of uses include being the international standard for timekeeping, managing broadcasts and satellite positioning, ...
Space & Earth / Space Exploration
Mar 28, 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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Molecular path from internal clock to cells controlling rest and activity revealed in new study
(PhysOrg.com) -- The molecular pathway that carries time-of-day signals from the body's internal clock to ultimately guide daily behavior is like a black box, says Amita Sehgal, PhD, the John Herr Musser Professor ...
Feb 07, 2012 |
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World timekeepers split on scrapping leap second
Timekeepers meeting in Geneva failed to agree Thursday on a proposal to abolish a 40-year-old practice of adding the occasional second to world time.
Jan 19, 2012 |
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'Leap second' under the gun at Geneva time talks
Timekeepers gathered in Geneva on Thursday to thrash out a contested proposal to abolish a 40-year-old practice of adding the occasional second to world time.
Space & Earth / Space Exploration
Jan 19, 2012 |
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Countries consider time out on the 'leap second'
It's high noon for the humble leap second. After ten years of talks, governments are headed for a showdown vote this week on an issue that pits technological precision against nature's whims.
Space & Earth / Earth Sciences
Jan 17, 2012 |
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'Doomsday' ticks closer on nuclear, climate fears
Global uncertainty on how to deal with the threats of nuclear weapons and climate change have forced the "Doomsday clock" one minute closer to midnight, leading international scientists said Tuesday.
Jan 10, 2012 |
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Russian spacecraft delivers new crew to ISS
A spacecraft carrying two Russians and an American docked Wednesday with the International Space Station in the first Russian manned mission for five months after a spate of technical failures.
Space & Earth / Space Exploration
Nov 16, 2011 |
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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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Scientists meet to discuss usefulness of GMT
Leading scientists from around the world are meeting in Britain from Thursday to consider a proposal that could eventually see Greenwich Mean Time relegated to a footnote in history.
Nov 03, 2011 |
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Gene controlling flowering boosts energy production from sorghum
A sorghum hybrid that does not flower and accumulates as much as three times the amount of stem and leaf matter may help the bioenergy industry, according to a study appearing today in the Proceedings of th ...
Sep 27, 2011 |
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Newly discovered molecule essential to resetting 'body clocks'
(PhysOrg.com) -- Research has shown that light is the key to getting our 'body clocks' back in sync and now a new study exploring the resynchronisation mechanism in insects has discovered a molecule essential ...
Jul 13, 2011 |
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Daylight savings time can be dangerous
Daylight Saving Time begins Sunday, March 13, but a word of caution. Studies have found that losing an hour can be hazardous for your health.
Mar 14, 2011 |
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Body's clock may lead to increased risk for fainting during the nighttime
Fainting, or syncope, is quite common. About 50% of people will experience fainting at some point during their lifetime. The most common type of fainting is vasovagal syncope (VVS) that is caused by a sudden drop in blood ...
Medicine & Health / Medical research
Mar 07, 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.
