Results 31 to 40 of about 346,110 (185)

Effects of environmental enrichment on behavioral responses to novelty, learning, and memory, and the circadian rhythm in cortisol in growing pigs [PDF]

open access: yes, 2000
Previously we showed that pigs reared in an enriched environment had higher baseline salivary cortisol concentrations during the light period than pigs reared under barren conditions.
Prelle, Ina T.,   +22 more
core   +1 more source

Research progress on relationships of circadian rhythm with thyroid function and diseases

open access: yes环境与职业医学, 2022
Circadian rhythm is a phenomenon of diurnal changes in life activities formed by a transcription-translation feedback loop of biological clock genes affected by external environmental conditions.
Yuping YANG   +6 more
doaj   +1 more source

Global parameter search reveals design principles of the mammalian circadian clock [PDF]

open access: yes, 2008
Background: Virtually all living organisms have evolved a circadian (~24 hour) clock that controls physiological and behavioural processes with exquisite precision throughout the day/night cycle.
Locke, James C. W.   +3 more
core   +1 more source

Circadian rhythm dysfunction in bipolar affective disorder

open access: yesEuropean Psychiatry, 2021
Introduction Sleep is paramount in bipolar affective disorder and sleep disturbance can be a trigger or initial manifestation of an episode of illness.
M.T. Valadas, R. Mota Freitas
doaj   +1 more source

Modulatory effects in circadian-related diseases via the reciprocity of tea polyphenols and intestinal microbiota

open access: yesFood Science and Human Wellness, 2022
Tea is a widespread functional plant resource. Phytochemicals such as tea polyphenols (TP) can interact with the intestinal flora and participate in regulating the expression and rhythm of biological clock genes.
Ruonan Yan, Chi-Tang Ho, Xin Zhang
doaj   +1 more source

Isolation of new genes involved in temperature synchronization of the circadian clock of Drosophila melanogaster [PDF]

open access: yes, 2010
PhDCircadian clocks regulate behaviour and physiology of many organisms and keep them in synchrony with the environment. Drosophila's circadian clock is mainly synchronized by natural light-dark cycles and temperature fluctuations, both at molecular
Simoni, Alekos
core   +4 more sources

Cosinor-rhythmometry for 24-h urinary sodium, potassium, creatinine excretion in the Chinese adult population

open access: yesChinese Medical Journal, 2021
. Background:. The low accuracy of equations predicting 24-h urinary sodium excretion using a single spot urine sample contributed to the misclassification of individual sodium intake levels.
Ya-Guang Peng   +7 more
doaj   +1 more source

Circadian Rhythms in Immunity [PDF]

open access: yesCurrent Allergy and Asthma Reports, 2020
This review is focused on the existing evidence for circadian control of innate and adaptive immune responses to provide a framework for evaluating the contributions of diurnal rhythms to control of infections and pathogenesis of disease.Circadian rhythms driven by cell-autonomous biological clocks are central to innate and adaptive immune responses ...
openaire   +2 more sources

Circadian Disruption Primes Myofibroblasts for Accelerated Activation as a Mechanism Underpinning Fibrotic Progression in Non-Alcoholic Fatty Liver Disease [PDF]

open access: yes, 2023
Circadian rhythm governs many aspects of liver physiology and its disruption exacerbates chronic disease. CLOCKΔ19 mice disrupted circadian rhythm and spontaneously developed obesity and metabolic syndrome, a phenotype that parallels the progression of ...
Varinder S. Athwal   +38 more
core   +1 more source

Effect of deuterium on the circadian period and metabolism in wild-type and tau mutant Syrian hamsters [PDF]

open access: yes, 2000
Homozygous tau mutant Syrian hamsters (tau-/-) have a free-running circadian period (τ) around 20 h and a proportionally higher metabolic rate compared with wild-type hamsters (tau+/+) with a period of circa 24 h.
Malgorzata Oklejewicz   +8 more
core   +1 more source

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