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The discovery of rhythmicity in host and pathogen activities dates back to the Hippocratic era, but the causes and consequences of these biological rhythms have remained poorly understood. Rhythms in infection phenotypes or traits are observed across taxonomically diverse hosts and pathogens, suggesting general evolutionary principles. Understanding these principles may enable rhythms to be leveraged in manners that improve drug and vaccine efficacy or disrupt pathogen timekeeping to reduce virulence and transmission. Explaining and exploiting rhythms in infections require an integrative and multidisciplinary approach, which is a hallmark of research within chronobiology. Many researchers are welcomed into chronobiology from other fields after observing an unexpected rhythm or time-of-day effect in their data. Such findings can launch a rich new research topic, but engaging with the concepts, approaches and dogma in a new discipline can be daunting. Fortunately, chronobiology has well-developed frameworks for interrogating rhythms that can be readily applied in novel contexts. Here, we provide a 'how to' guide for exploring unexpected daily rhythms in infectious disease research. We outline how to establish: whether the rhythm is circadian, to what extent the host and pathogen are responsible, the relevance for host–pathogen interactions, and how to explore therapeutic potential. This article is part of the Theo Murphy meeting issue 'Circadian rhythms in infection and immunity'. [ABSTRACT FROM AUTHOR]

Background: Waiting is an important topic in healthcare debates, mostly discussed in the form of waiting lists and waiting times. In this discourse, the experiential element of waiting stays hidden. Understanding the waiting experiences of patients can help to better understand healthcare waiting practices, which have a large impact on patients. Methods: We performed a thematic analysis on 12 patients' books of women with breast cancer. We focused on the theme of waiting within these stories, through an abductive analysis. Results: We identified three themes within the waiting practices of patients with breast cancer: (1) Thickening of time, (2) contaminated time and (3) navigating time. The theme thickening of time highlights waiting moments where time is experienced as moving at a very slow pace with intense emotional impact. The theme of contaminated time highlights the waiting processes as an ongoing component of experiencing illness. The theme of navigating time highlights patients' temporal agency, showing their waiting work in the form of strategies for dealing with practical and emotional aspects of waiting. Discussion: The waiting experiences of patients provide insights into the burden of waiting, which is partly connected to the way healthcare services are organised and the experience of illness. Understanding these multifaceted experiences of patients helps pinpoint areas for healthcare quality improvement. Patient or Public Contribution: The choice for the theme and approach of this research, waiting, was developed with a citizen science initiative of collecting patient stories. [ABSTRACT FROM AUTHOR]

Under the influence of the sedimentation process, the phenomenon of intraformational non-homogeneity is widely observed in low-permeability reservoirs. In the development process of water and gas replacement (WAG), the transport law of water and gas and the distribution of residual oil are seriously affected by the non-homogeneity of reservoir properties. In this paper, a study on two types of reservoirs with certain lengths and thicknesses is carried out, and a reasonable development method is proposed according to the characteristics of each reservoir. Firstly, through indoor physical simulation experiments combined with low-field nuclear magnetic resonance scanning (NMR), this study investigates the influence of injection rate and core length on the double-layer low-permeability inhomogeneous core replacement and pore throat mobilization characteristics. Then, a two-layer inhomogeneous low-permeability microscopic model is designed to investigate the model's replacement and pore throat mobilization characteristics under the combined influence of rhythmites, gravity, the injection rate, etc. Finally, based on the results of the core replacement and numerical simulation, a more reasonable development method is proposed for each type of reservoir. The results show that for inhomogeneous cores of a certain length, the WAG process can significantly increase the injection pressure and effectively seal the high-permeability layer through the Jamin effect to improve the degree of recovery. Moreover, for positive and reverse rhythm reservoirs of a certain thickness, the injection rate can be reduced according to the physical properties of the reservoir, and the gravity overburden phenomenon of the gas is used to achieve the effective development of the upper layers. The effect of the development of a positive rhythm reservoir therefore improved significantly. These findings provide data support for improving the development effectiveness of CO2 in low-permeability inhomogeneous reservoirs and emphasize the importance of the influence of multiple factors, such as injection flow rate, gravity, and rhythm, in CO2 replacement. [ABSTRACT FROM AUTHOR]

This paper evaluates the role of 'temporality' in defining functional regions. Functional regions are viewed as relatively closed in terms of selected population flows (or more generally concerning spatial interactions). They are usually defined by the daily commuting to work and are therefore commonly referred to as local labour market areas or travel-to-work areas. Using mobile phone location data, however, it is possible to work with population flows in a broader temporal and spatial context. Then we can talk about the temporality alternatives of functional regions depending on whether we base them on regular daily population flows, irregular daily population flows (which, according to the data analysis, are irregular from an individual's point of view but regular from a spatial unit's point of view between which they take place) or weekend population flows. Thus, several functional region's versions can be defined for a single regional system, where the different population movement's rhythm lengths movements limit their length and also determine their hierarchy. All functional regions' temporal alternatives according to mobile phone location data are defined based on data from the Czech Republic. [ABSTRACT FROM AUTHOR]

The article discusses Paul Fraisse’s early study of the timing of what he called ‘spontaneous’ rhythms, where people were required to perform a specified sequence of spaced taps on a response key without the times between the responses being controlled. Results come from his doctoral thesis, carried out under the supervision of Albert Michotte in Louvain/Leuven in Belgium between 1935 and 1937. In spite of the lack of timing instructions, responses were divided into ‘short times’ (around 200 ms), ‘long times’ (usually around 450 ms), and ‘pauses’ (the times between execution of consecutive rhythmic sequences). This division held over changes in the tap sequence, when different patterns of three, four, and five responses were produced. A later experiment varied total sequence duration, including the pauses, and the ratio of long to short times was approximately preserved even with marked changes in sequence duration, except at the slowest speed. Fraisse regarded the pause as having a different function from the short and long times. It changed only slightly when the pattern changed, but marked changes in the duration of the pause did not affect the pattern. Fraisse suggested it was a kind of separator, needed to maintain the rhythmic structure of the patterns, and used the idea of a temporal ‘Gestalt’ where the pause represented the ‘ground’ or ‘framework’ and the rhythmic sequence the ‘Figure ’. [ABSTRACT FROM AUTHOR]

Circadian rhythms are a ubiquitous feature throughout the organism. Accumulating evidence suggests that the dysfunction of circadian rhythms due to genetic mutations or environmental factors contributes to the genesis and progress of multiple diseases. The physiological homeostasis of the ocular surface, like any other tissue or organ, is also orchestrated by circadian rhythms. In this review, we summarize the molecular clocks and the expression of clock-controlled genes in the mammalian ocular surface. Based on the circadian expression of these genes, we conclude the diurnal oscillations of cellular biological activities in the mammalian ocular surface. Moreover, we evaluate the factors entraining circadian oscillators in the ocular surface. Finally, we further discuss the latest development of the close correlation between circadian rhythms and ocular health. Briefly, this review aimed to synthesize the previous studies to aid in understanding the importance of circadian rhythms in the ocular surface and the possible opportunities for circadian rhythm-based interventional strategies to restore the homeostasis of the ocular surface. [ABSTRACT FROM AUTHOR]

Diagnostic encounters can be seen as complex socio‐material processes. Drawing on the new materialist ideas of Barad, we studied how an innovative technology became part of the intra‐actions between different human and non‐human materialities in a cervical cancer diagnostic process. While researching the development of a technology intended to improve cervical cancer detection, we carried out a series of observations of diagnostic encounters involving clinicians, patients and the device in a hospital. The intra‐actions between the different materialities had rhythmic properties, repeated activities and timings that varied in intensity, for example, movements, exchanged looks, and talk that helped co‐produce the diagnosis and maintain consent. Sadly, the device interfered with the rhythms, undermining the clinicians' desire to adopt it, despite it being more accurate at diagnosing ill health than previous assistive technologies. Studying rhythms as part of diagnostic encounters could help with the design and subsequent integration of novel technologies in healthcare, because they encompass relationships created by human and non‐human materialities. Importantly, highlighting the role of rhythms contributes another way diagnostic encounters are co‐produced between clinicians and patients, and how they can be disrupted, improving the understanding of how consent is maintained or lost. [ABSTRACT FROM AUTHOR]

A Dār is a space that offers various courses and programmes that teach the Quran, the Hadith and the different branches of Islamic knowledge that derive from, and are in conversation with, both. The question this article intends to explore is: what is the Dār? It does so by looking at the temporal and geographic context the Dār exists in, and how it is situated historically, as well as its everyday rhythms. The vignettes presented throughout the article provide insight into the ways in which a space of knowledge can exist, teasing the bounds of structure, order and rigidity, allowing us to explore potential imaginaries to the ways we have experienced, and the ways we imagine, Islamic spaces of knowledge to be. [ABSTRACT FROM AUTHOR]

Circadian clocks, internal mechanisms that generate 24-hour rhythms, play a crucial role in coordinating biological events with day-night cycles. In light-deprived environments such as caves, species, particularly isolated obligatory troglobites, may exhibit evolutionary adaptations in biological rhythms due to light exposure. To explore rhythm expression in these settings, we conducted a comprehensive literature review on invertebrate chronobiology in global subterranean ecosystems, analyzing 44 selected studies out of over 480 identified as of September 2023. These studies revealed significant taxonomic diversity, primarily among terrestrial species like Coleoptera, with research concentrated in the United States, Italy, France, Australia, and Brazil, and a notable gap in African records. Troglobite species displayed a higher incidence of aperiodic behavior, while troglophiles showed a robust association with rhythm expression. Locomotor activity was the most studied aspect (>60%). However, approximately 4% of studies lacked information on periodicity or rhythm asynchrony, and limited research under constant light conditions hindered definitive conclusions. This review underscores the need to expand chronobiological research globally, encompassing diverse geographical regions and taxa, to deepen our understanding of biological rhythms in subterranean species. Such insights are crucial for preserving the resilience of subsurface ecosystems facing threats like climate change and habitat loss. [ABSTRACT FROM AUTHOR]

Biological rhythms are ubiquitous. They can be generated by circadian oscillators, which produce daily rhythms in physiology and behavior, as well as by developmental oscillators such as the segmentation clock, which periodically produces modular developmental units. Here, we show that the circadian clock controls the timing of late-stage floret development, or anthesis, in domesticated sunflowers. In these plants, up to thousands of individual florets are tightly packed onto a capitulum disk. While early floret development occurs continuously across capitula to generate iconic spiral phyllotaxy, during anthesis floret development occurs in discrete ring-like pseudowhorls with up to hundreds of florets undergoing simultaneous maturation. We demonstrate circadian regulation of floral organ growth and show that the effects of light on this process are time-of-day dependent. Delays in the phase of floral anthesis delay morning visits by pollinators, while disruption of circadian rhythms in floral organ development causes loss of pseudowhorl formation and large reductions in pollinator visits. We therefore show that the sunflower circadian clock acts in concert with environmental response pathways to tightly synchronize the anthesis of hundreds of florets each day, generating spatial patterns on the developing capitulum disk. This coordinated mass release of floral rewards at predictable times of day likely promotes pollinator visits and plant reproductive success.

Measurement of blood levels of circulating hormones has always been the cornerstone of the biochemical diagnosis of endocrine diseases, with the objective of detecting hormone excess or insufficiency. Unfortunately, the dynamic nature of hormone secretion means single-point measurements of many hormones often lack diagnostic validity. Endocrinologists have devised complex dynamic tests as indirect assessments of the functioning of the hormone system under investigation. Recent advances in the measurement of dynamic hormone changes across the day now offer an opportunity to reconsider whether there might be better ways both to diagnose and to monitor the therapy of endocrine conditions. [ABSTRACT FROM AUTHOR]

This article reviews the Rhythms of Kinabalu 2022 from the dual perspective of management and performance. Ever since its commencement in 2011, Rhythms of Kinabalu has been a yearly large-scale event organised by the National Department for Culture and Arts under the Ministry of Tourism, Arts and Culture Malaysia along with other collaborative bodies. The aim of this festival is to showcase the diversity and uniqueness of the dances, arts, and music in Sabah for the purpose of their continued popularity, relevance, and sustainability. As such, the review examines the current nature of festival, paying attention to the various categories of performances and performers in Rhythms of Kinabalu 2022 as well as the favoured and less favoured performances and/or artists as indicated by viewer turnouts of the live shows. At the same time, the article seeks to understand the local audiences' reception and/or reaction towards the event and its many shows to signal the current festivalgoers' taste and preference of the performing arts. A main observation reveals the striking presence of the art of busking and an imbalance in the representation of modern and traditional art forms. Essentially, the representation of traditional arts was limited and those artists struggled to keep up with their more modern counterpart. Technology, namely, social media, has been identified to have played a major role in influencing this outcome and contributing to this scenario. Management wise, the lack of cooperation from business entities (i.e., premise operators and owners) in support of the local artists, performers, small and medium enterprises, and the event itself is a cause for concern as this has caused several setbacks which were detrimental to the festival's operations. Hence, the art-based and managerial issues identified in this review may benefit the relevant stakeholders in its decision-making of the festival's future cycles. [ABSTRACT FROM AUTHOR]

Introduction: During and since the Covid-19 pandemic there has been an intensified integration of digital technologies into the everyday lives of older people. We do, however, know little about the ways in which older people incorporate digital technologies and communications into their daily lives and their own meanings, embodiment and experiences of the digital during and since the Covid-19 pandemic. Method: The aim of our research was to explore the use of digital devices during and since the Covid-19 pandemic and to identify facilitators and barriers to incorporating digital devices into everyday life. The research involved a series of online focus groups with people aged between 63 and 86 years living in the United Kingdom and were conducted in 2022. Each focus group lasted around 90 min and data was audio-recorded and transcribed. The data was analysed thematically. Results: From the analysis, three interconnecting whilst analytically distinct themes around the meaning and experiences of using digital devices in everyday life during and since the pandemic, are thematically presented as: (1) Incorporating the digital into everyday life; (2) Social and digital connectivity; and (3) Challenges and limitations of the digital in everyday life. Discussion: The research has provided insights into the way digital devices were used by older people during and since the Covid-19 pandemic. In particular, we highlight the increasing importance of digital connectivity and the ways in which older people actively engage (and resist) technologies of communication in their daily lives; and the significance of embodied co-presence and the immediacy of shared space and/or time is highlighted. [ABSTRACT FROM AUTHOR]

The 'compact city' implies a return to the urban morphology of the nineteenth-century city, one in which most people walked, predominantly for utilitarian purposes. This article, however, details a leisure practice—the bourgeois promenade—as it unfolded in Stockholm. Employing a diverse set of texts and visual sources the article seeks to understand how this genteel urban practice was enabled and performed in the midst of a growing working-class population with which they shared the streets. It suggests that new street lighting and smoother pavements redirected vision from the ground to the people around, opening up for walking practices that foregrounded the visual over other senses—one being the bourgeois promenade. It further highlights the multiple rhythms of the promenade and the upper middle class' efforts to create hierarchies of walking on city pavements and in urban parks. In sum, the article shows that leisure mobility was central to the very idea of nineteenth century urban life. Meanwhile, its exclusive character cautions against the one-sided imaginaries of strolling and consumption in today's endeavours to recreate the compact city. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos del Centro de Estudios de Diseño y Comunicación is the property of Cuadernos del Centro de Estudios de Diseno y Comunicacion and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The study is aimed at assessing individual and age-related features of the functional state of various parts of the brain and the patterns of their ontogenetic changes based on the structural analysis of resting-state electroencephalogram (EEG) patterns in 5–7-years-old children. The study involved 266 children, who were divided into different age groups: Group 1—5-years-old (mean age 4.98 ± 0.33), Group 2—6-years-old (mean age 6.03 ± 0.35), and Group 3—7-years-old (mean age 6.85 ± 0.22). Alpha-rhythm parameters recorded mainly in the occipital areas may serve as an indicator for the functional maturation of the brain. Significant age-related changes in the alpha-rhythm parameters have been revealed. The presence of a regular alpha-rhythm with a frequency of 8–10 Hz increases from 5 to 7 years of age. The occurrence of the alpha-rhythm of low frequency significantly decreases by the age of 7 years, and the occurrence of the polyrhythmic alpha-rhythm—by the age of 6 years. These changes are caused both by complications of the structural and functional organization of the cerebral cortex at the cellular level, which occur throughout the studied age period, and the improvement of its relationships with subcortical structures. A decrease in the occurrence of high-amplitude alpha-band electrical activity (EA) with signs of hypersynchrony in the caudal regions may indicate the maturation of the system of nonspecific activation of the brainstem reticular formation from 5 to 7 years of age. Age dynamics is also manifested in a significant decrease in the EEG occurrence of theta-band EA, and in its zonal distribution in 5–7-years-old children aged. Such changes specify the process of progressive formation of functional connections between individual areas of the cortex, as well as the cortex and subcortical structures, in particular thalamo-cortical ones. The occurrence of alpha-band EA (less than 5.0%) and beta-band EA (about 13.0%) arranged topographically in the anterior cortex did not differ significantly with age. However, generalized EEG activity in the form of different frequency band waves, which characterizes the functional state of predominantly hypothalamic structures, occurs reliably more often in 7-years-old children rather than in 5-year-old children. Such dynamics is presumably associated with an increased reactivity of the hypothalamic-pituitary system in response to adaptive stresses caused by the transition to systematic learning and can be considered as a distinctive feature of this age period. Due to great restructuring of the brain functioning, all its structures become especially sensitive to high intellectual and emotional stress, which is characteristic of preschool children nowadays. The novelty of this study is highlighted by the identification of patterns, structure and nature of EA changes in 5- to 7-year-old normotypical children's brain to assess the functional state of the cortex and regulatory brain systems. The research results based on a large sample of children, growing up in modern social and cultural conditions, would provide guidance for the formation of age standards. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Arabic Language Sciences & Literature / Maǧallaẗ ʻUlūm Al-Luġaẗ Al-ʻArabiyyaẗ Wa-Ādābi-hā is the property of Arab Journal of Sciences & Research Publishing (AJSRP) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Cities are crucially but problematically positioned to take on the climate crisis. Although local governance seems an appropriate scale for adaptation and mitigation measures, numerous barriers to implementing them effectively have been diagnosed. We argue that a focus on pinpointable barriers neglects the intrinsic organisational dynamics that often impede effective climate action. Drawing on interviews with climate specialists in Finnish municipalities, we engage with local governance practices and study how the interviewees experience and negotiate the complexities of climate work. Using Henri Lefebvre's rhythmanalysis, we find that municipalities treat climate issues as auxiliary concerns and subsume them as separate, precarious projects. The various and conflicting rhythms that constitute the relations of organisational practices leave climate and environmental experts in a contentious state. They must not only endure constant sidelining by the core functions of their organisations but also devise strategies to keep climate issues on the agenda. We suggest that organisational practices are constituted by diverging and often conflictual rhythms. Analysing their expressions in everyday climate work, we show how a composed functioning of municipal organisations serves to persistently defer a change of pace towards achieving ambitious climate goals. [ABSTRACT FROM AUTHOR]

Square-wave bursting is an activity pattern common to a variety of neuronal and endocrine cell models that has been linked to central pattern generation for respiration and other physiological functions. Many of the reduced mathematical models that exhibit square-wave bursting yield transitions to an alternative pseudo-plateau bursting pattern with small parameter changes. This susceptibility to activity change could represent a problematic feature in settings where the release events triggered by spike production are necessary for function. In this work, we analyze how model bursting and other activity patterns vary with changes in a timescale associated with the conductance of a fast inward current. Specifically, using numerical simulations and dynamical systems methods, such as fast-slow decomposition and bifurcation and phase-plane analysis, we demonstrate and explain how the presence of a slow negative feedback associated with a gradual reduction of a fast inward current in these models helps to maintain the presence of spikes within the active phases of bursts. Therefore, although such a negative feedback is not necessary for burst production, we find that its presence generates a robustness that may be important for function. [ABSTRACT FROM AUTHOR]

IntroductionDuring and since the Covid-19 pandemic there has been an intensified integration of digital technologies into the everyday lives of older people. We do, however, know little about the ways in which older people incorporate digital technologies and communications into their daily lives and their own meanings, embodiment and experiences of the digital during and since the Covid-19 pandemic.MethodThe aim of our research was to explore the use of digital devices during and since the Covid-19 pandemic and to identify facilitators and barriers to incorporating digital devices into everyday life. The research involved a series of online focus groups with people aged between 63 and 86 years living in the United Kingdom and were conducted in 2022. Each focus group lasted around 90 min and data was audio-recorded and transcribed. The data was analysed thematically.ResultsFrom the analysis, three interconnecting whilst analytically distinct themes around the meaning and experiences of using digital devices in everyday life during and since the pandemic, are thematically presented as: (1) Incorporating the digital into everyday life; (2) Social and digital connectivity; and (3) Challenges and limitations of the digital in everyday life.DiscussionThe research has provided insights into the way digital devices were used by older people during and since the Covid-19 pandemic. In particular, we highlight the increasing importance of digital connectivity and the ways in which older people actively engage (and resist) technologies of communication in their daily lives; and the significance of embodied co-presence and the immediacy of shared space and/or time is highlighted.

Transcranial neuromodulation methods have the potential to diagnose and treat brain disorders at their neural source in a personalized manner. However, it has been difficult to investigate the direct effects of transcranial neuromodulation on neurons in human brain tissue. Here, we show that human brain organoids provide a detailed and artifact-free window into neuromodulation-evoked electrophysiological effects. We derived human cortical organoids from induced pluripotent stem cells and implanted 32-channel electrode arrays. Each organoid was positioned in the center of the human skull and subjected to low-intensity transcranial focused ultrasound. We found that ultrasonic stimuli modulated network activity in the gamma and delta ranges of the frequency spectrum. The effects on the neural networks were a function of the ultrasound stimulation frequency. High gamma activity remained elevated for at least 20 minutes following stimulation offset. This approach is expected to provide controlled studies of the effects of ultrasound and other transcranial neuromodulation modalities on human brain tissue.

Knowledge about the rhythmic activity of neural networks associated with the implementation of a particular brain function can be used to construct diagnostic systems for objective analyses of cognitive dysfunctions. The aim of this study was to identify specific frequency-based electroencephalogram phenomena associated with speech processing. The study included data from 40 clinically healthy volunteers aged 30 to 50 years (median 32.5 years), including 23 men and 17 women. While listening to a speech stimulus, changes in bioelectrical activity over the speech centers were recorded in 23 subjects (58%). During active speech production, similar changes were recorded in 12 subjects (30%). A pairwise comparison of electroencephalogram frequencies recorded during background recording and listening to the stimuli revealed statistically significant differences in changes in rhythmic activity over Broca's area during listening and over Wernicke's area during active speech production, while changes in rhythmic activity over Broca's area during active speech production and over Wernicke's area during listening were less significant. The most characteristic changes in the bioelectrical activity over the speech centers during listening and speaking were fluctuations with a frequency (on average) of 17.5-17.7 Hz. This may reflect a specific electroencephalogram rhythm associated with activity in the speech areas of the brain, which could allow these regions to be more accurately identified during auditory-verbal processing. [ABSTRACT FROM AUTHOR]

The mammalian brain has an endogenous central circadian clock that regulates central and peripheral cellular activities. At the molecular level, this day-night cycle induces the expression of upstream and downstream transcription factors that influence the immune system and the severity of viral infections over time. In addition, there are also circadian effects on host tolerance pathways. This stimulates adaptation to normal changes in environmental conditions and requirements (including light and food). These rhythms influence the pharmacokinetics and efficacy of therapeutic drugs and vaccines. The importance of circadian systems in regulating viral infections and the host response to viruses is currently of great importance for clinical management. With the knowledge gained from the COVID-19 pandemic, it is important to address any outbreak of viral infection that could become endemic and to quickly focus research on any knowledge gaps. For example, responses to booster vaccination COVID-19 may have different time-dependent patterns during circadian cycles. There may be a link between reactivation of latently infected viruses and regulation of circadian rhythms. In addition, mammals may show different seasonal antiviral responses in winter and summer. This article discusses the importance of the host circadian clock during monkeypox infection and immune system interactions. [ABSTRACT FROM AUTHOR]

N-acylethanolamines (NAEs) are a family of endogenous lipid signaling molecules that are involved in regulation of energy homeostasis in vertebrates with a putative role on circadian system. The aim of this work was to study the existence of daily fluctuations in components of NAEs system and their possible dependence on food intake. Specifically, we analyzed the content of oleoylethanolamide (OEA), palmitoylethanolamide (PEA), stearoylethanolamide (SEA), their precursors (NAPEs), as well as the expression of nape-pld (NAEs synthesis enzyme), faah (NAEs degradation enzyme), and pparα (NAEs receptor) in gastrointestinal and brain tissues of goldfish (Carassius auratus) throughout a 24-h cycle. Daily profiles of bmal1a and rev-erbα expression in gastrointestinal tissues were also quantified because these clock genes are also involved in lipid metabolism, are PPAR-targets in mammals, and could be a link between NAEs and circadian system in fish. Gastrointestinal levels of NAEs exhibited daily fluctuations, with a pronounced and rapid postprandial increase, the increment being likely caused by food intake as it is not present in fasted animals. Such periprandial differences were not found in brain, supporting that NAEs mobilization occurs in a tissue-specific manner and suggesting that these three NAEs could be acting as peripheral satiety signals. The abundance of pparα mRNA displayed a daily rhythm in the intestine and the liver, suggesting a possible rhythmicity in the NAEs functionality. The increment of pparα expression during the rest phase can be related with its role stimulating lipid catabolism to obtain energy during the fasting state of the animals. In addition, the clock genes bmal1a and rev-erbα also showed daily rhythms, with a bmal1a increment after feeding, supporting its role as a lipogenic factor. In summary, our data show the existence of all components of NAEs system in fish (OEA, PEA, SEA, precursors, synthesis and degradation enzymes, and the receptor PPARα), supporting the involvement of NAEs as peripheral satiety signals.

The genus Sebastes is a morphologically and ecologically diverse genus of rockfish characterized by high longevity, late-maturity and low natural mortality. On the northwest Atlantic continental shelf, the Acadian redfish (Sebastes fasciatus) is the most common rockfish species above 300 m depth. This species has been widely exploited resulting in the depletion or collapse of most of its stocks. Management of long-lived species with intricate life-history characteristics is challenging and requires highly integrated biological and oceanographic monitoring, which allow the identification of environmental drivers and demographic and behavioral trends. The present study uses high-temporal resolution imaging and environmental data, acquired with an autonomous lander deployed for 10-months at the Sambro Bank Sponge Conservation Area (Scotian Shelf) to elucidate S. fasciatus temporal dynamics and behavioral trends in response to near-bed environmental conditions. S. fasciatus, mostly displayed passive locomotion and static behaviors, in common with other shelf-dwelling Sebastes species. Structural complexity provided by sponges positively influenced S. fasciatus presence. Fish used sponges to avoid being dragged by bottom currents. Hydrodynamics appear to act as a synchronizing factor conditioning its swimming behavior. S. fasciatus total counts exhibited a seasonal shift in rhythm’s phase likely reflecting changes in lifestyle requirements. This study provides new insights on S. fasciatus dynamics and behavior. Nonintrusive monitoring approaches, such as the one used in this study, will be key to monitor this threatened species populations. Especially, since it is expected that S. fasciatus will experience distribution shifts to higher latitudes due to future climate stressors.

Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease in young people. Although biologics now enable most children and adolescents with JIA to enjoy clinical remission, patients present lower physical activity and spend more time in sedentary behavior than their healthy counterparts. This impairment probably results from a physical deconditioning spiral initiated by joint pain, sustained by apprehension on the part of both the child and the child’s parents, and entrenched by lowered physical capacities. This in turn may exacerbate disease activity and lead to unfavorable health outcomes including increased risks of metabolic and mental comorbidities. Over the past few decades, there has been growing interest in the health benefits of increased overall physical activity as well as exercise interventions in young people with JIA. However, we are still far from evidence-based physical activity and / or exercise prescription for this population. In this review, we give an overview of the available data supporting physical activity and / or exercise as a behavioral, non-pharmacological alternative to attenuate inflammation while also improving metabolism, disease symptoms, poor sleep, synchronization of circadian rhythms, mental health, and quality of life in JIA. Finally, we discuss clinical implications, identify gaps in knowledge, and outline a future research agenda.

The circadian clock may help to control the development patterns which allow the florets on a sunflower head to go through their final stages of maturation at precisely the right time.

Cycling has cut across public health and policy forums in the last decade given trends in urban governance for liveability and uptake of cycling during the COVID‐19 pandemic. This review discusses work that helps understand where, how, and why time spent cycling can contribute to health and well‐being. The review discusses how cycling geographies offers an alternative to biomedical approaches that measure the risks versus the medical benefits of riding a bike. The paper is structured around three key themes that characterise contemporary cycling geographies (a) cycling and neoliberalism; (b) cycling citizenship; and (c) everyday cycling. The paper argues, these studies have not gone far enough in understanding the relationship between well‐being and cycling. To help address this gap the review offers a 'mobile territories of well‐being' framework. To conclude, consideration is given to the policy implications of a cycling geographies research agenda engaging with a mobile territories of well‐being framework. [ABSTRACT FROM AUTHOR]

Over millennia, environmental light-dark cycle provided a dependable indicator of time of day. It showed the effects of light on physiology and behaviour in every animal. Furthermore, sunrise and sunset (dawn and dusk) usually refer to the duration of day length when the upper edge of the sun's disk is on the horizon. Interestingly, before the onset of sunrise and after sunset there is twilight (dawn and dusk), during which there is natural light provided by the upper atmosphere. Evidences suggested that transitions (twilight) are more essential to synchronize organisms circadian (circa = about; dian = day) and circannual (circa = about; annum = year) rhythms (seasonal events). Overall, we say that all the characteristics of light pose major changes in the behavior and physiology of animals and plant system. In this mini-review, we discuss the noteworthy aspects of dawn and dusk chorus and the behavioural changes observed during this switching between day and night times. [ABSTRACT FROM AUTHOR]

Recurring patterns are an integral part of life on Earth. Through evolution or breeding, plants have acquired systems that coordinate with the cyclic patterns driven by Earth's movement through space. The biosystem responses to these physical rhythms result in biological cycles of daily and seasonal activity that feed back into the physical cycles. Signaling networks to coordinate growth and molecular activities with these persistent cycles have been integrated into plant biochemistry. The plant circadian clock is the coordinator of this complex, multiscale, temporal schedule. However, we have detailed knowledge of the circadian clock components and functions in only a few species under controlled conditions. We are just beginning to understand how the clock functions in real-world conditions. This review examines what we know about the circadian clock in diverse plant species, the challenges with extrapolating data from controlled environments, and the need to anticipate how plants will respond to climate change. [ABSTRACT FROM AUTHOR]

Circadian clocks keep time to coordinate diverse behaviors and physiological functions. While molecular circadian rhythms are evident during early development, most behavioral rhythms, such as sleep–wake, do not emerge until far later. Here, we examine the development of circadian clocks, outputs, and behaviors across phylogeny, with a particular focus on Drosophila. We explore potential mechanisms for how central clocks and circadian output loci establish communication, and discuss why from an evolutionary perspective sleep–wake and other behavioral rhythms emerge long after central clocks begin keeping time. [ABSTRACT FROM AUTHOR]

Biological rhythms are ubiquitous. They can be generated by circadian oscillators, which produce daily rhythms in physiology and behavior, as well as by developmental oscillators such as the segmentation clock, which periodically produces modular developmental units. Here, we show that the circadian clock controls the timing of late-stage floret development, or anthesis, in domesticated sunflowers. In these plants, up to thousands of individual florets are tightly packed onto a capitulum disk. While early floret development occurs continuously across capitula to generate iconic spiral phyllotaxy, during anthesis floret development occurs in discrete ring-like pseudowhorls with up to hundreds of florets undergoing simultaneous maturation. We demonstrate circadian regulation of floral organ growth and show that the effects of light on this process are time-of-day dependent. Delays in the phase of floral anthesis delay morning visits by pollinators, while disruption of circadian rhythms in floral organ development causes loss of pseudowhorl formation and large reductions in pollinator visits. We therefore show that the sunflower circadian clock acts in concert with environmental response pathways to tightly synchronize the anthesis of hundreds of florets each day, generating spatial patterns on the developing capitulum disk. This coordinated mass release of floral rewards at predictable times of day likely promotes pollinator visits and plant reproductive success.

Night work is an area in which transformational changes are occurring, many identified by geographers, but in which the role of night itself – the 'nocturnality' of night work – has often been overlooked. This article looks at how geographical research into work and interdisciplinary research from night studies could inform one another, arguing that a focus on the nocturnality of night work can generate wider insights into existing social and economic geographical research into labour. Importantly, the challenges brought by the nocturnality of night work make its study valuable for understanding social justice under contemporary capitalism. [ABSTRACT FROM AUTHOR]

The circadian clock is an intracellular timekeeping device that drives daily rhythms in diverse and extensive processes throughout the body. The clock mechanism comprises a core transcription/translation negative feedback loop that is modulated by a complex set of additional interlocking feedback loops. Pharmacological manipulation of the clock may be valuable for treating many maladies including jet lag, shift work and related sleep disorders, various metabolic diseases, and cancer. We review recent identification of small-molecule clock modulators and discuss the biochemical features of the core clock that may be amenable to future drug discovery. Circadian rhythms govern many physiological processes and have been linked to diseases such as cancer and metabolic disorders. Pharmacological manipulation of circadian rhythms can have profoundly different effects depending on whether the positive or negative arm of the loop is targeted and in which direction. The biochemical features of the core circadian clock components reveal many possible avenues for pharmacological modulation. Identification of compounds that target the core circadian proteins will provide tools for further dissection of the clock mechanism and will have broad therapeutic potential. [ABSTRACT FROM AUTHOR]

Neurons are embedded in complex networks, where they participate in repetitive, coordinated interactions with other neurons. Neuronal spike timing is thus predictably constrained by a range of ionic currents that shape activity at both short (milliseconds) and longer (tens to hundreds of milliseconds) timescales, but we lack analytical tools to rigorously identify these relationships. Here, we innovate a modeling approach to test the relationship between oscillations in the local field potential (LFP) and neuronal spike timing. We use kernel density estimation to relate single neuron spike timing and the phase of LFP rhythms (in simulated and hippocampal CA1 neuronal spike trains). We then combine phase and short (3 ms) spike history information within a logistic regression framework ("phaseSH models"), and show that models that leverage refractory constraints and oscillatory phase information can effectively test whether--and the degree to which--rhythmic currents (as measured from the LFP) reliably explain variance in neuronal spike trains. This approach allows researchers to systematically test the relationship between oscillatory activity and neuronal spiking dynamics as they unfold over time and as they shift to adapt to distinct behavioral conditions. [ABSTRACT FROM AUTHOR]