Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 177 for “"circadian rhythms"”.
-
The effects of circadian rhythms on visual thresholds
… that visual thresholds fluctuate in a circadian rhythmic (twenty-four hour) pattern was examined. Subjects were tested at 0400h, 1000h, 1600h and 2200h in a 30 minute dark adaptation procedure using a von Békésy tracking method. Two experiments were performed; the first tested cone …
-
Mathematical Modeling of Circadian Rhythms in Drosophila melanogaster
Circadian rhythms are periodic physiological cycles that recur about every 24 hours, by means of which organisms integrate their physiology and behavior to the daily cycle of light and temperature imposed by the rotation of the earth. Circadian derives from the Latin word circa "about" and dies …
-
Bright light therapy and the circadian rhythms : the effects of bright light therapy on the circadian rhythms in healthy young adults
Research has shown that a destabilized circadian rhythms (CR) can result in sleep disturbances as well as increasing the likelihood of developing anxiety symptoms. A stable circadian rhythm is therefore important to the individual’s long term physical and mental health. Bright light therapy (BLT) …
-
Alternative Scheduling in the Middle School: Considering Circadian Rhythms.
<p>The passage of No Child Left Behind has increased the level of accountability for all educators. There are many factors that affect student achievement. One factor that may be overlooked is the schedule configuration of schools. Addressing student needs through scheduling options may assist …
-
Circadian rhythms in Lhc gene expression in pharbitis nil chois
… Lhcbl *1 (cabi) gene as a heterologous probe. A circadian rhythm in P. nil Lhc gene expression was detected in constant light. This rhythm was initiated or reset to a constant phase by the initial light-on signal received by the plants, and was detectable for at least five days in constant light. …
-
The Effect of General Anaesthesia on Circadian Rhythms in Mice
… anaesthesia), patients often report symptoms of circadian misalignment that can last up to five days. Animal studies have now demonstrated that GA may be, at least in part, responsible for these effects, causing timedependent shifts on circadian rhythms of behaviour, physiology, and cognitive …
-
Exploring circadian rhythms, food intake, and their interactions in marine invertebrates
Circadian rhythms and energy metabolism are critical and interconnected components of animal physiology. Metabolic inputs like time of feeding modulate circadian clocks and behavioral and molecular rhythms. In turn, circadian clocks regulate metabolic processes, allowing animals to optimize energy …
-
Identification of Peptidyl-prolyl cis/trans isomerases affecting Drosophila circadian rhythms
… 11 Ⅲ. RESULTS 12 A. PPIases alters Drosophila circadian activity rhythms 12 B. DOD 19 1. Daily cycle of core clock protein in dod knockdown flies 19 2. Degradatin of PER is attenuated when DOD is overexpressed in S2 cells 22 3. DOD interacts with hyperphosphorylated PER in S2 cells 28 C. CG5808 …
-
Quantitative characterisation of single-cell circadian rhythms in cyanobacteria Synechococcus elongatus
… in light caused by our planet’s rotation. Circadian (24-h) rhythms enable living systems to adapt to environmental cycles and anticipate the changes in their surroundings. To perform their functions, the clocks must be sensitive to the entraining cues and simultaneously resilient to …
-
Exploring circadian rhythms, food intake, and their interactions in marine invertebrates
Circadian rhythms and energy metabolism are critical and interconnected components of animal physiology. Metabolic inputs like time of feeding modulate circadian clocks and behavioral and molecular rhythms. In turn, circadian clocks regulate metabolic processes, allowing animals to optimize energy …
-
Fetal tissue containing the suprachiasmatic nucleus restores circadian rhythms in old rats
Circadian rhythms of body temperature, locomotor activity, and drinking in many rats deteriorate or even disappear with age. The suprachiasmatic nucleus (SCN) in the anteroventral hypothalamus has been identified as the major circadian pacemaker in mammals. When fetal tissue containing the SCN is …
-
The Application and Challenges of RNA-Sequencing to the Study of Circadian Rhythms
The circadian clock drives daily rhythms in behavior and physiology, often in anticipation of the coming dusk or dawn. Almost all organisms possess an internal time-keeper, as it represents an adaptation to one of the most ancient selective pressures; the day-night cycle. Mounting evidence suggests …
-
The effects of the noradrenaline reuptake inhibitor atomoxetine on circadian rhythms in mice.
Circadian rhythms are patterns in behavioural, physiological and many others parameters that recur approximately every twenty four hours. Dysfunction of the circadian system is being linked to a number of common illnesses. The psychiatric condition Attention Deficit/Hyperactivity Disorder (ADHD) …
-
Relationships between circadian rhythms, timing of eating behaviors, and the human gastrointestinal microbiota
… of this research was to assess the links between circadian rhythms, timing of eating, and the human gastrointestinal microbiota. To accomplish this goal, a thorough review of the current literature was first conducted. Second, a cross-section of healthy, adult subjects was examined to determine …
-
Regulation of Circadian Rhythms by Sleep -Wake Centers in the Brainstem and Basal Forebrain
Circadian rhythms are the near-24 hr oscillations in phenomenon including hormone release and the sleep-wake cycle, and in mammals are regulated by the suprachiasmatic nucleus (SCN). The proper interaction of the circadian and sleep-wake cycles is essential for well-being, but the means by which …
-
The role of circadian rhythms in reproduction: development and fertility in the bmal1 null mouse.
Circadian rhythms are the endogenous cycling of hormones, activity patterns and gene expression that occur across 24 hours. Disruption of circadian rhythms has been associated with multiple health complications, including reduction of fertility. The bmal1 mouse provides an animal model for central …
-
Circadian rhythms of redox state and regulation of neuronal excitability in suprachiasmatic nucleus of rodents
Daily rhythms of mammalian physiology, metabolism, and behavior parallel the day-night cycle. They are driven by the central circadian clock in the brain, the suprachiasmatic nucleus (SCN), where a genetic oscillator plays an essential role. Clock-gene transcription/translation is sensitive to …
-
An investigation into morning light therapy, circadian rhythms and sleep-wake cycles in postoperative cardiac patients
… to cause disruption of sleep-wake cycles and circadian rhythms in animal models and in humans. These disturbances may adversely affect the well-being and recovery of patients. In this thesis, I describe a stepwise investigation to determine the effects of the clinical lighting environment on …
-
Modeling of Circadian Rhythms: Robust Temperature Compensation in Drosophila melanogaster and Testable Hypotheses in Neurospora crassa
Circadian rhythms are periodic physiological events that recur about every 24 hours. The word circadian derives from the Latin words <i>circ</i>a "about" and <i>dies</i> "day". The importance of circadian rhythms is well recognized in many different organisms' survival as well as in human …
Page 1 of 9