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Can Environmental Toxins Disrupt the Biological “Clock”?（图）
Environmental Toxins Disrupt the Biological Clock
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2017/11/23
Can environmental toxins disrupt circadian rhythms – the biological “clock” whose disturbance is linked to chronic inflammation and a host of human disorders? Research showing a link between circadian...
JILA’s 3-D Quantum Gas Atomic Clock Offers New Dimensions in Measurement（图）
JILA 3-D Quantum Gas Atomic Clock New Dimensions Measurement
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2017/10/25
JILA physicists have created an entirely new design for an atomic clock, in which strontium atoms are packed into a tiny three-dimensional (3-D) cube at 1,000 times the density of previous one-dimensi...
Melting Sea Ice May Be Speeding Nature’s Clock in the Arctic
Melting Sea Ice Nature’s Clock the Arctic
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2017/3/14
Spring is coming sooner to some plant species in the low Arctic of Greenland, while other species are delaying their emergence amid warming winters. The changes are associated with diminishing sea ice...
Sunflowers Move by the Clock
Sunflowers Move Clock
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2016/8/11
It’s summertime, and the fields of Yolo County are filled with ranks of sunflowers, dutifully watching the rising sun. At the nearby University of California, Davis, plant biologists have now discover...
New Theory Turns Back Clock on Conditions Behind Universe's Origin
Turns Back Clock Universe's Origin
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2016/2/22
In a new study, scientists from The University of Texas at Dallas and their colleagues suggest a novel way for probing the beginning of space and time, potentially revealing secrets about the conditio...
Evolutionary Clock Ticks for Snowshoe Hares Facing Climate Change
Evolutionary Clock Ticks Snowshoe Hares Climate Change
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2016/2/22
Anthropogenic climate change has created myriad stressors that threaten to cause local extinctions if wild populations fail to adapt to novel conditions. We studied individual and population-level fit...
Body size, metabolic rate, generation time, and the molecular clock
molecular clock generation time
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2015/12/17
There is increasing evidence for variation in
rates of nucleotide substitution among divergent taxonomic
groups. Here, we summarize published rate data and show a
strong relationship between substi...
New ‘reset’ button discovered for circadian clock
reset button circadian clock
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2015/3/4
The discovery of a new “reset” button for the brain’s master biological clock could eventually lead to new treatments for conditions like seasonal affective disorder, reduce the adverse health effects...
Habitual sleep duration is associated with BMI and macronutrient intake and may be modified by CLOCK genetic variants
CLOCK circadian rhythm dietary intake gene-environment interaction sleep duration
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2018/12/20
Background: Short sleep duration has been associated with greater risks of obesity, hypertension, diabetes, and cardiovascular disease. Also, common genetic variants in the human Circadian Locomotor O...
JILA strontium atomic clock sets new records in both precision and stability（图）
strontium atomic clock lasers
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2014/3/18
Heralding a new age of terrific timekeeping, a research group at JILA—a joint institute of the University of Colorado Boulder and the National Institute of Standards and Technology—has unveiled an exp...
Performance of a 229 Thorium solid-state nuclear clock
Performance 229 Thorium solid-state nuclear clock Atomic Physics
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2012/4/24
The 7.8 eV nuclear isomer transition in 229 Thorium has been suggested as an etalon transition in a new type of optical frequency standard. Here we discuss the construction of a "solid-state nuclear c...
Gyromagnetic Factors and Atomic Clock Constraints on the Variation of Fundamental Constants
Gyromagnetic Factors Atomic Clock Constraints Variation Fundamental Constants
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2011/10/14
We consider the effect of the coupled variations of fundamental constants on the nucleon magnetic moment. The nucleon g-factor enters into the interpretation of the measurements of variations in the f...
Gyromagnetic Factors and Atomic Clock Constraints on the Variation of Fundamental Constants
Gyromagnetic Factors Atomic Clock Constraints Fundamental Constants
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2011/8/17
Abstract: We consider the effect of the coupled variations of fundamental constants on the nucleon magnetic moment. The nucleon g-factor enters into the interpretation of the measurements of variation...
Rotating states in driven clock- and XY-models
soft modes nonequilibrium dynamics Statistical Mechanics
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2011/8/23
Abstract: We consider 3D active plane rotators, where the interaction between the spins is of XY-type and where each spin is driven to rotate. For the clock-model, when the spins take N\gg1 possible v...
A robust two-gene oscillator at the core of Ostreococcus tauri circadian clock
two-gene oscillator Ostreococcus tauri circadian clock
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2011/1/5
The microscopic green alga Ostreococcus tauri is rapidly emerging as a promising model organism in the green lineage. In particular, recent results by Corellou et al. [Plant Cell, 21, 3436 (2009)] and...