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Le Tallec Thomas - - 2013
Among anthropogenic pressures, light pollution altering light/dark cycles and changing the nocturnal component of the environment constitutes a threat for biodiversity. Light pollution is widely spread across the world and continuously growing. However, despite the efforts realized to describe and understand the effects of artificial lighting on fauna, few studies ...
Fanjul-Moles Maria Luisa - - 2013
This work reviews concepts regarding the endogenous circadian clock and the relationship between oxidative stress (OS), light and entrainment in different organisms including crustaceans, particularly crayfish. In the first section, the molecular control of circadian rhythms in invertebrates, particularly in Drosophila, is reviewed, and this model is contrasted with recent ...
Ramsey Kathryn Moynihan KM Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, - - 2013
Many of our behavioral and physiological processes display daily oscillations that are under the control of the circadian clock. The core molecular clock network is present in both the brain and peripheral tissues and is composed of a complex series of interlocking transcriptional/translational feedback loops that oscillate with a periodicity ...
Rillich Jan - - 2013
Walking and flying in locusts are exemplary rhythmical behaviors generated by central pattern generators (CPG) that are tuned in intact animals by phasic sensory inputs. Although these two behaviors are mutually exclusive and controlled by independent CPGs, leg movements during flight can be coupled to the flight rhythm. To investigate ...
White Michael D MD CORRESPONDING AUTHOR: Michael D. White, mwhite@schulershook.com; (612) - - 2013
To review from an architectural lighting perspective the effects of indoor lighting on the health and well-being of people in senior living environments. The role of circadian rhythms in people with chronic disorders continues to be a focus of laboratory research and clinical trials. Beneficial, evidence-based indoor lighting design strategies ...
Yonekura Madoka - - 2013
Although sucrose plays a role in sugar sensing and its signaling pathway, little is known about the regulatory mechanisms of the expressions of plant sucrose-related genes. Our previous study on the expression of the sucrose phosphate synthase gene family in rice (OsSPSs) suggested the involvement of sucrose sensing and/or circadian ...
Bardet Nathalie N CNRS UMR 7207, Département Histoire de la Terre, Muséum National d'Histoire Naturelle, Paris, - - 2013
Secondary adaptation to aquatic life occurred independently in several amniote lineages, including reptiles during the Mesozoic and mammals during the Cenozoic. These evolutionary shifts to aquatic environments imply major morphological modifications, especially of the feeding apparatus. Mesozoic (250-65 Myr) marine reptiles, such as ichthyosaurs, plesiosaurs, mosasaurid squamates, crocodiles, and turtles, ...
Sancho Oltra Núria - - 2012
A new modular approach to an artificial light-harvesting antenna system is presented. The approach involves the hierarchical self-assembly of porphyrin acceptor molecules to G-quadruplexes tethered to coumarin donor moieties.
Coogan Andrew N - - 2012
Alzheimer's disease (AD) is a devastating neurodegenerative condition associated with severe cognitive and behavioral impairments. Circadian rhythms are recurring cycles that display periods of approximately 24 hours and are driven by an endogenous circadian timekeeping system centered on the suprachiasmatic nucleus of the hypothalamus. We review the compelling evidence that ...
Ross Callum F - - 2013
Differences in rhythmicity (relative variance in cycle period) among mammal, fish, and lizard feeding systems have been hypothesized to be associated with differences in their sensorimotor control systems. We tested this hypothesis by examining whether the locomotion of tachymetabolic tetrapods (birds and mammals) is more rhythmic than that of bradymetabolic ...
Di Caprio Giuseppe - - 2012
Diatoms are among the dominant phytoplankters in the world's oceans, and their external silica investments, resembling artificial photonic crystals, are expected to play an active role in light manipulation. Digital holography allowed studying the interaction with light of Coscinodiscus wailesii cell wall reconstructing the light confinement inside the cell cytoplasm, ...
Viollet Stéphane - - 2012
Flying insects keep their visual system horizontally aligned suggesting that gaze stabilization is a crucial first step in flight control. Unlike flies, hymenopteran insects, such as bees and wasps do not have halteres that provide fast, feed-forward angular rate information to stabilize head orientation in the presence of body rotations. ...
Forsman P - - 2012
Postural control during quiet stance is a common everyday physical activity. Sleepiness is increasingly prevalent in our 24-h society. Yet, little research exists that quantitatively links the fluctuations in sleepiness and postural control. This study quantifies the circadian amplitude and homeostatic buildup rate in postural control. With a force plate ...
Ben-Simon Eti - - 2012
The unique role of the EEG alpha rhythm in different states of cortical activity is still debated. The main theories regarding alpha function posit either sensory processing or attention allocation as the main processes governing its modulation. Closing and opening eyes, a well-known manipulation of the alpha rhythm, could be ...
Guilding Clare - - 2012
Within the core molecular clock, protein phosphorylation and degradation play a vital role in determining circadian period. The 'after-hours' (Afh) mutation in mouse slows the degradation of the core clock protein CRY, lengthening the period of the molecular clock in the suprachiasmatic nuclei and behavioural wheel-running rhythms. However, we do ...
Han Muxin - - 2012
A guiding light is sufficient to switch back and forth between the flexible and the stretched, rigid form of a self-assembled coordination cage based on two square-planar-coordinated Pd(II) ions and four ligands with a photochromic dithienylethene (DTE) backbone. The light-driven interconversion is clean and reversible and allows to control the ...
Cao J - - 2012
Our previous study suggested that green light promotes broiler growth during the early stage [posthatching day (P) 0 to P26], and blue light enhances growth during the later stage (P27 to P49). The purpose of this study was to improve broiler growth and productive performance by using a combination of ...
Münch Mirjam - - 2012
Environmental light synchronizes the primary mammalian biological clock in the suprachiasmatic nuclei, as well as many peripheral clocks in tissues and cells, to the solar 24-hour day. Light is the strongest synchronizing agent (zeitgeber) for the circadian system, and therefore keeps most biological and psychological rhythms internally synchronized, which is ...
Olmedo Maria - - 2012
Circadian clocks provide a temporal structure to processes from gene expression to behavior in organisms from all phyla. Most clocks are synchronized to the environment by alternations of light and dark. However, many organisms experience only muted daily environmental cycles due to their lightless spatial niches (e.g., caves or soil). ...
Saunders D S - - 2012
In studies of photoperiodic induction of over-wintering diapause, independent variation of the light (L) and dark (D) components of the daily (LD) cycle shows, with few exceptions, that the duration of the night (D) is more important than that of the day (L). Extensions of D to give cycle lengths ...
Montgomery Jenna R JR Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, - - 2013
In mammals, almost all aspects of circadian rhythmicity are attributed to activity in a discrete neural circuit of the hypothalamus, the suprachiasmatic nucleus (SCN). A 24-h rhythm in spontaneous firing is the fundamental neural intermediary to circadian behavior, but the ionic mechanisms that pattern circuit rhythmicity, and the integrated impact ...
Bass Joseph - - 2012
Biological clocks are genetically encoded oscillators that allow organisms to anticipate changes in the light-dark environment that are tied to the rotation of Earth. Clocks enhance fitness and growth in prokaryotes, and they are expressed throughout the central nervous system and peripheral tissues of multicelled organisms in which they influence ...
Henry Molly J - - 2012
The human ability to continuously track dynamic environmental stimuli, in particular speech, is proposed to profit from "entrainment" of endogenous neural oscillations, which involves phase reorganization such that "optimal" phase comes into line with temporally expected critical events, resulting in improved processing. The current experiment goes beyond previous work in ...
Yadav Pankaj - - 2012
Although, circadian clocks are believed to be involved in the regulation of life-history traits such as pre-adult development time and lifespan in fruit flies Drosophila melanogaster, there is very little unequivocal evidence either to support or refute this. Here we report the results of a long-term study aimed at examining ...
Terecskei Kata K Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, H-6726 Szeged, - - 2013
Circadian clocks are biochemical timers regulating many physiological and molecular processes according to the day/night cycle. The small GTPase LIGHT INSENSITIVE PERIOD1 (LIP1) is a circadian clock-associated protein that regulates light input to the clock. In the absence of LIP1, the effect of light on free-running period length is much ...
Soong Keryea - - 2012
Semilunar and lunar rhythms are often controlled endogenously, but the mechanisms of their respective free-run periods, when external factors are absent, are mostly unclear. In this investigation, the authors studied the mechanism controlling the period of the circasemilunar emergence rhythm of a marine midge, Pontomyia oceana, in southern Taiwan. Experimental ...
Kannan Nisha N - - 2012
Robustness is a fundamental property of biological timing systems that is likely to ensure their efficient functioning under a wide range of environmental conditions. Here we report the findings of our study aimed at examining robustness of circadian clocks in fruit fly Drosophila melanogaster populations selected to emerge as adults ...
Nicaise Virginie - - 2012
This study investigated the impact of renovation and redesign of a university preschool's outdoor space on children's sedentary behavior, light activity, and moderate-to-vigorous-physical-activity (MVPA) during unstructured recess. Physical activity was measured by accelerometry and direct observation in two independent samples of 50 (baseline) and 57 (postintervention) children (Mage = 4.4 ...
Granados-Fuentes Daniel D Department of Biology, Washington University, St. Louis, MO 63130, - - 2013
Daily rhythms in neural activity underlie circadian rhythms in sleep-wake and other daily behaviors. The cells within the mammalian suprachiasmatic nucleus (SCN) are intrinsically capable of 24-h timekeeping. These cells synchronize with each other and with local environmental cycles to drive coherent rhythms in daily behaviors. Recent studies have identified ...
Kawazoe Ryo - - 2012
In Chlamydomonas growing under 24 h light-dark cycles, chloroplast transcription is under circadian clock control, and peaks early in the morning. The peak (but not trough) requires ongoing cytoplasmic translation, as it is sensitive to cycloheximide (CH). The chloroplast transcriptional apparatus in Chlamydomonas is simpler than in land plants, with only ...
Jones Shirley - - 2012
SESSION TYPE: Neuro Critical CarePRESENTED ON: Tuesday, October 23, 2012 at 04:30 PM - 05:45 PMPURPOSE: Delirium is a frequent complication in intensive care unit (ICU) patients and alterations in circadian rhythms may have a role. Melatonin is a marker of circadian rhythmicity and peaks around 4:00 am. Evidence suggests ...
Evans Jennifer A - - 2012
Because the circadian clock in the mammalian brain derives from a network of interacting cellular oscillators, characterizing the nature and bases of circadian coupling is fundamental to understanding how the pacemaker operates. Various phenomena involving plasticity in circadian waveform have been theorized to reflect changes in oscillator coupling; however, it ...
Kauranen Hannele - - 2012
The circadian clock plays an important role in adaptation in time and space by synchronizing changes in physiological, developmental, and behavioral traits of organisms with daily and seasonal changes in their environment. We have studied some features of the circadian activity and clock organization in a northern Drosophila species, Drosophila ...
Oates A R AR College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada. - - 2013
Parkinson's disease (PD) causes instability and difficulty adapting to changing environmental and task demands. We examined the effects of PD on the adaptation of gait termination (GT) on a slippery surface under unexpected and cued circumstances. An unexpected slip perturbation during GT was followed by a slip perturbation during GT ...
Yi Guosheng G School of Electrical and Automation Engineering, Tianjin University, No. 92 Weijin Road, Tianjin, 300072 - - 2013
To explore the effects of manual acupuncture (MA) on brain activities, we design an experiment that acupuncture at acupoint ST36 of right leg with four different frequencies to obtain electroencephalograph (EEG) signals. Many studies have demonstrated that the complexity of EEG can reflect the states of brain function, so we ...
Martín-Robles Agueda J - - 2012
Circadian rhythms are established very early during vertebrate development. In fish, environmental cues can influence the initiation and synchronization of different rhythmic processes. Previous studies in zebrafish and rainbow trout have shown that circadian oscillation of clock genes represents one of the earliest detectable rhythms in the developing embryo, suggesting ...
Raiewski Evan E EE Department of Psychology, and Center for Chronobiology, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0109, USA. - - 2012
The daily pattern of blood-borne melatonin varies seasonally under the control of a multi-oscillator circadian pacemaker. Here we examine patterns of melatonin secretion and locomotor activity in Siberian and Syrian hamsters entrained to bimodal LDLD8:4:8:4 and LD20:4 lighting schedules that facilitate novel temporal arrangements of component circadian oscillators. Under LDLD, ...
Oliveira Catarina C V - - 2012
The existence of daily rhythms under light/dark (LD) cycles in plasma cortisol, blood glucose and locomotor and self-feeding activities, as well as their persistence (circadian nature) under constant light (LL), was investigated in Senegalese sole (Solea senegalensis). For the cortisol and glucose rhythms study, 48 soles were equally distributed in ...
London Justin - - 2012
Theories of rhythm in western music go back to Aristoxenus (335 BC) and have continued unabated to the present day. Yet while music theoretic discussions of melody and harmony since Pythagoras have often looked to mathematics and acoustics, only recently has music theory availed itself of research in acoustics, psychoacoustics, ...
Kouser Shereen - - 2012
The daily patterning of animal behaviour is presumed to be due to changes in responsiveness to external stimuli, as a function of varying internal states which may be oscillating with a 24 h period. The endogenous circadian system functions to organize behaviour and physiology to adapt to and anticipate environmental ...
Ng Benedict Shien Wei - - 2012
Oscillatory activity in sensory cortices reflects changes in local excitation-inhibition balance, and recent work suggests that phase signatures of ongoing oscillations predict the perceptual detection of subsequent stimuli. Low-frequency oscillations are also entrained by dynamic natural scenes, suggesting that the chance of detecting a brief target depends on the relative ...
Müller Werner E G - - 2012
Sponges are filter feeders that consume large amount of energy to allow a controlled filtration of water through their aquiferous canal systems. It is shown that primmorphs, three-dimensional cell aggregates prepared from the demosponge Suberites domuncula and cultured in vitro, change their morphology depending on the light supply. Upon exposure ...
Herrel Anthony - - 2012
Caecilians are limbless amphibians that have evolved distinct cranial and postcranial specializations associated with a burrowing lifestyle. Observations on feeding behavior are rare and restricted to above-ground feeding in laboratory conditions. Here we report data on feeding in tunnels using both external video and X-ray recordings of caecilians feeding on ...
de Ronde W H - - 2012
Using a Gaussian model, we study the transmission of time-varying biochemical signals through feed-forward motifs and diamond motifs. To this end, we compute the frequency dependence of the gain, the noise, as well as their ratio, the gain-to-noise ratio, which measures how reliably a network transmits signals at different frequencies. ...
Grzybowski Andrzej - - 2012
Niels Ryberg Finsen (1860–1904) developed a lamp based on electric carbon arcs (later known as the Finsen light) that was used for skin therapy a century ago. He became director of the Medical Light Institute in Copenhagen, later the Finsen Institute, where he developed this method of treatment. Within a ...
Barisoni Laura - - 2012
Context.-Assessing the amount of globotriaosylceramide inclusions in renal peritubular capillaries by a semiquantitative approach is a standard and useful measure of therapeutic efficacy in Fabry disease, achievable by light microscopy analysis. Objective.-To describe a novel virtual microscopy quantitative method to measure globotriaosylceramide inclusions (Barisoni Lipid Inclusion Scoring System [BLISS]) in ...
Xie Tao - - 2012
BackgroundPatients with Parkinson's disease (PD) may develop freezing of gait (FOG) with chronic deep brain stimulation (DBS) of the subthalamic nucleus (STN) at the commonly used frequency of 130 Hz and FOG can be ameliorated by 60 Hz stimulation in some patients. It is not clear whether the development of ...
Queiroz Mirian Francisca Martins - - 2012
Leishmaniasis is an infectious and parasitic zoonotic, non-contagious, vector-borne disease caused by protozoa of the genus Leishmania. In Brazil, the major vector of Leishmania (Leishmania) infantum chagasi (Cunha & Chagas, 1934) is Lutzomyia longipalpis. Barra do Garças, State of Mato Grosso, was designated as a priority area by the Brazilian ...
Little Simon S Department of Clinical Neurology, 6th Floor, West wing, John Radcliffe Hospital, Oxford University, Headley Way, Oxford, OX3 9DU, UK. - - 2012
Low-frequency oscillations in the basal ganglia are prominent in patients with Parkinson's disease off medication. Correlative and more recent interventional studies potentially implicate these rhythms in the pathophysiology of Parkinson's disease. However, effect sizes have generally been small and limited to bradykinesia. In this study, we investigate whether these effects ...
Hojjati Mohammad M Department of Food Science and Technology, Ramin Agriculture and Natural Resources University, Mollasani, Ahvaz - - 2014
The strain bacterium Dietzia natronolimnaea has propounded as a source for biological production of canthaxanthin. Because of sensitivity of this pigment, examine on its stability is important. In this study, stability of encapsulated canthaxanthin from D. natronolimnaea HS-1 using soluble soybean polysaccharide (SSPS), gum acacia (GA), and maltodextrin (MD) as ...
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