搜索结果: 1-15 共查到“国际动态 the Clock”相关记录15条 . 查询时间(0.125 秒)
Atomic clocks are the world’s most precise timekeepers. Based on periodic transitions between two electronic states of an atom, they can track the passage of time with a precision as high as one part ...
Can Environmental Toxins Disrupt the Biological “Clock”?（图）
Environmental Toxins Disrupt the Biological Clock
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
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
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
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
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
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...
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...
JILA strontium atomic clock sets new records in both precision and stability（图）
strontium atomic clock lasers
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...
Biologists Discover How Biological Clock Controls Cell Division in Bacteria（图）
Biologists Biological Clock Cell Division Bacteria
2010/3/4
A team of biologists has unraveled the biochemistry of how bacteria so precisely time cell division, a key element in understanding how all organisms from bacteria to humans use their biological clock...
A new optical clock that is twice as accurate as any other has been unveiled by physicists in the US. The clock, which is based on a single aluminium ion, could remain accurate to within one second ov...
Racing the Clock: Rapid Climate Change Forces Scientists to Evaluate Extreme Conservation Strategies（图）
Clock Climate Change Scientists Extreme Conservation Strategies
2009/5/27
Scientists are, for the first time, objectively evaluating ways to help species adapt to rapid climate change and other environmental threats via strategies that were considered too radical for seriou...
09 March 2007，People differ markedly in their response to sleep deprivation but biological markers of these differences have remained elusive. In findings published in this week's issue of Current Bio...
February 15, 2007，Years of comparisons among the world’s best atomic clocks—based on different atoms—have established the most precise limits ever achieved in the laboratory for detecting possible cha...
19 January 2007，The spectre of a nuclear war 60 years ago was what created the "doomsday clock," the Bulletin of the Atomic Scientists'(BAS) cold war chronometer. The closer the clock to midnight, the...