Results 11 to 20 of about 118,339 (331)
Circadian Clocks and Metabolism [PDF]
, 2013 Circadian clocks maintain periodicity in internal cycles of behavior, physiology, and metabolism, enabling organisms to anticipate the 24-h rotation of the Earth. In mammals, circadian integration of metabolic systems optimizes energy harvesting and utilization across the light/dark cycle.
Biliana Marcheva +5 more
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Circadian Clocks: Evolution in the Shadows [PDF]
Current Biology, 2009 As scientists, we strive for highly controlled conditions. The real world, however, is noisy. Complex networks are a coping mechanism for an erratic environment.
Merrow, Martha, Maas, Marc F. P. M.
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Circadian Biology: Clocks within Clocks [PDF]
Current Biology, 2005 A small cluster of approximately 20,000 neurons in the ventral hypothalamus provide the body with key time-keeping signals and drive circadian rhythms. This circadian clock exhibits surprisingly complex substructures, with inputs from the retina, and outputs to other brain structures.
Piggins, Hugh D., Loudon, Andrew
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The Circadian Clock in Lepidoptera [PDF]
Frontiers in Physiology, 2021 With approximately 160,000 identified species of butterflies and moths, Lepidoptera are among the most species-rich and diverse insect orders. Lepidopteran insects have fundamental ecosystem functions as pollinators and valuable food sources for countless animals.
Brady D. +3 more
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The circadian clock in mammals [PDF]
The Journal of Headache and Pain, 2000 The basic physiological and anatomical basis for circadian rhythms in mammalian behaviour and physiology is introduced. The pathways involved in photic entrainment of the circadian clock are discussed in relation of new findings that identify the molecules that are involved in signalling between the environment and the clock.
ZORDAN, MAURO AGOSTINO, KYRIACOU C. P.
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The circadian clock and asthma [PDF]
Thorax, 2013 It is characteristic of asthma that symptoms worsen overnight, particularly in the early hours of the morning. Nocturnal symptoms in asthma are common and are an important indicator for escalation of treatment. An extensive body of research has demonstrated that nocturnal symptoms of cough and dyspnea are accompanied by circadian variations in airway ...
Durrington, Hannah J. +3 more
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The circadian clock of cyanobacteria [PDF]
BioEssays, 2000 A circadian clock, with physiological characteristics similar to those of eukaryotes, functions in the photosynthetic prokaryote, cyanobacteria. The molecular mechanism of this clock has been efficiently dissected using a luciferase reporter gene that reports the status of the clock.
T, Kondo, M, Ishiura
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Circadian clocks in the ovary [PDF]
Trends in Endocrinology & Metabolism, 2010 Clock gene expression has been observed in tissues of the hypothalamic-pituitary-gonadal (HPG) axis. Whereas the contribution of hypothalamic oscillators to the timing of reproductive biology is well known, the role of peripheral oscillators like those in the ovary is less clear.
Michael T, Sellix, Michael, Menaker
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Nutrients, 2023 Rhythmicity is a fundamental characteristic of every living organism [...]
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Circadian Clocks: Translation Lost [PDF]
Current Biology, 2005 One of the big questions in biological rhythms research is how a stable and precise circa-24 hour oscillation is generated on the molecular level. While increasing complexity seemed to be the key, a recent report suggests that circa-24 hour rhythms can be generated by just four molecules incubated in a test tube.
Roenneberg, T, Merrow, M
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