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Can Environmental Toxins Disrupt the Biological “Clock”?（图）
Environmental Toxins Disrupt the Biological Clock
2017/11/3
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...
Melting Sea Ice May Be Speeding Nature’s Clock in the Arctic
Melting Sea Ice Nature’s Clock the Arctic
2017/2/23
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
2016/8/4
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...
Evolutionary Clock Ticks for Snowshoe Hares Facing Climate Change
Evolutionary Clock Ticks Snowshoe Hares Climate Change
2016/1/21
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
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...
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
2014/11/19
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...
A robust two-gene oscillator at the core of Ostreococcus tauri circadian clock
two-gene oscillator Ostreococcus tauri circadian clock
2010/12/30
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...
Chaotic neuron clock
Chaotic neuron clock
2010/10/22
A simple threshold model of neuron firing (with the neuron membrane electrochemical potential governed by the chaotic Rossler attractor) has been analyzed by mapping the generated irregular spiking ti...
Biologists Discover How Biological Clock Controls Cell Division in Bacteria（图）
Biologists Biological Clock Cell Division Bacteria
2010/2/18
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...
摘要
生物钟基因普遍存在于生物界，其作用在于产生和控制昼夜节律的运转。生物钟基因及其编码的蛋白质组成反馈回路，维持振荡系统持续进行并与环境周期保持同步。各级进化水平物种生物钟的基因组成和控制途径有同有异。此文主要介绍蓝细菌、脉孢菌、果蝇、鼠和人昼夜钟的分子运作机制以及研究钟基因的意义和展望。
Abstract:The circadian clock genes,which generate ...
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...