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Juan Manuel Antúnez, María Del Mar Capella, José Francisco Navarro, Ana Adan
Although there have been described alterations of circadian rhythmicity both in patients with substance use disorder (SUD) and patients with major depressive disorder (MDD), the circadian characteristics of SUD patients with comorbid MDD (SUD-MDD) are unknown. Likewise, the possible influence of the different modalities of treatments (ambulatory or therapeutic community) upon the circadian rhythmicity of SUD patients has not been characterized. Therefore, this study analyzes the circadian rhythmic profiles of SUD and SUD-MDD patients under ambulatory and therapeutic community treatment...
2016: Chronobiology International
Mathew Vickers, Lin Schwarzkopf
To study behavioral thermoregulation, it is useful to use thermal sensors and physical models to collect environmental temperatures that are used to predict organism body temperature. Many techniques involve expensive or numerous types of sensors (cast copper models, or temperature, humidity, radiation, and wind speed sensors) to collect the microhabitat data necessary to predict body temperatures. Expense and diversity of requisite sensors can limit sampling resolution and accessibility of these methods. We compare body temperature predictions of small lizards from iButtons, DS18B20 sensors, and simple copper models, in both laboratory and natural conditions...
May 2016: Ecology and Evolution
M Pascual-Alonso, G C Miranda-de la Lama, L Aguayo-Ulloa, M Villarroel, M Mitchell, G A María
The study was conducted to evaluate the thermophysiological, haematological, biochemical and behavioural stress responses of sheep transported on road. A total of 44 Chamarita breed adult ewes were randomly allotted to one of two groups, one control group (untransported) and transported group (journey of 4 h), and blood stress indicators were measured 1 day before transport and at four time points post-transport (0, 4 and 24 h). Thermophysiological profiles of ewes were measured by temperature buttons (iButton Thermochron(®) ) and placed in intravaginal sponges...
June 2017: Journal of Animal Physiology and Animal Nutrition
D Adam, S D Johnston, L Beard, V Nicholson, A Lisle, J Gaughan, R Larkin, P Theilemann, A Mckinnon, W Ellis
BACKGROUND: Under predicted climate change scenarios, koala distribution in Australia is expected to be adversely affected. Recent studies have attempted to identify suitable habitat, based on models of bioclimatic regions, but to more accurately reflect the thermal tolerance and behavioural adaptations of the various regional populations, the koala's response to periods of heat stress will need to be investigated at the individual animal level. OBJECTIVE: To explore the safety and suitability of temperature-sensitive intra-abdominal implants for monitoring core body temperature in the koala...
January 2016: Australian Veterinary Journal
T S Pronina, N I Orlova, V P Rybakov
Results of long-term research of becoming circadian rhythm of temperature (CRT) of human skin of shoulder during puberty are presented. For this purpose, 48-hour monitoring T at children, teenagers and mature young men and female from 8 till 22-th years with application of a method "Thermochron iButton" has been led. Age dynamics of mesor, reflecting process of becoming thermoregulation of organism during puberty, has wave character. The first wave with maximum T was observed at children of 10-11 years, second maximum T--at teenagers of 14-15 years...
March 2015: Fiziologiia Cheloveka
Luísa K Pilz, Caroline L Quiles, Eliane Dallegrave, Rosa Levandovski, Maria Paz L Hidalgo, Elaine Elisabetsky
OBJECTIVE: Circadian disturbances common to modern lifestyles have been associated with mood disorders. Animal models that mimic such rhythm disturbances are useful in translational research to explore factors contributing to depressive disorders. This study aimed to verify the susceptibility of BALB/c, C57BL/6N, and CF1 mice to photoperiod changes. METHODS: Thermochron iButtons implanted in the mouse abdomen were used to characterize temperature rhythms. Mice were maintained under a 12:12 h light-dark (LD) cycle for 15 days, followed by a 10:10 h LD cycle for 10 days...
July 2015: Revista Brasileira de Psiquiatria
Aaron J E Bach, Ian B Stewart, Alice E Disher, Joseph T Costello
PURPOSE: Skin temperature assessment has historically been undertaken with conductive devices affixed to the skin. With the development of technology, infrared devices are increasingly utilised in the measurement of skin temperature. Therefore, our purpose was to evaluate the agreement between four skin temperature devices at rest, during exercise in the heat, and recovery. METHODS: Mean skin temperature ([Formula: see text]) was assessed in thirty healthy males during 30 min rest (24...
2015: PloS One
E R Kuras, D M Hondula, J Brown-Saracino
Urban environmental health hazards, including exposure to extreme heat, have become increasingly important to understand in light of ongoing climate change and urbanization. In cities, neighborhoods are often considered a homogenous and appropriate unit with which to assess heat risk. This manuscript presents results from a pilot study examining the variability of individually experienced temperatures (IETs) within a single urban neighborhood. In July 2013, 23 research participants were recruited from the South End neighborhood of Boston and equipped with Thermochron iButtons that measured the air temperatures surrounding individuals as they went about their daily lives...
October 2015: International Journal of Biometeorology
Ajay Pillarisetti, Mayur Vaswani, Darby Jack, Kalpana Balakrishnan, Michael N Bates, Narendra K Arora, Kirk R Smith
Household air pollution generated from solid fuel use for cooking is one of the leading risk factors for ill-health globally. Deployment of advanced cookstoves to reduce emissions has been a major focus of intervention efforts. However, household usage of these stoves and resulting changes in usage of traditional polluting stoves is not well characterized. In Palwal District, Haryana, India, we carried out an intervention utilizing the Philips HD4012 fan-assisted stove, one of the cleanest biomass stoves available...
December 16, 2014: Environmental Science & Technology
Luísa K Pilz, Yasmine Trojan, Caroline L Quiles, Radharani Benvenutti, Gabriela Melo, Rosa Levandovski, Maria Paz L Hidalgo, Elaine Elisabetsky
Circadian rhythm disturbances are among the risk factors for depression, but specific animal models are lacking. This study aimed to characterize the effects of acute rhythm disruption in mice and investigate the effects of imipramine and N-acetylcysteine (NAC) on rhythm disruption-induced changes. Mice were exposed to 12:12-hour followed by 10:10-hour light:dark cycles (LD); under the latter, mice were treated with saline, imipramine or NAC. Rhythms of rest/activity and temperature were assessed with actigraphs and iButtons, respectively...
March 2015: Chronobiology International
Mariëtte R Boon, Leontine E H Bakker, Rianne A D van der Linden, Lenka Pereira Arias-Bouda, Frits Smit, Hein J Verberne, Wouter D van Marken Lichtenbelt, Ingrid M Jazet, Patrick C N Rensen
BACKGROUND: Brown adipose tissue (BAT) has emerged as a novel player in energy homeostasis in humans and is considered a potential new target for combating obesity and related diseases. The current 'gold standard' for quantification of BAT volume and activity is cold-induced 18F-FDG uptake in BAT. However, use of this technique is limited by cost and radiation exposure. Given the fact that BAT is a thermogenic tissue, mainly located in the supraclavicular region, the aim of the current study was to investigate whether cold-induced supraclavicular skin temperature and core body temperature may be alternative markers of BAT activation in humans...
2014: PloS One
Franz Langer, Joanna Fietz
Body temperature (Tb) represents one of the key parameters in ecophysiological studies with focus on energy saving strategies. In this study we therefore comparatively evaluated the usefulness of two types of temperature-sensitive passive transponders (LifeChips and IPTT-300) and one data logger (iButton, DS1922L) mounted onto a collar to measure Tb in the field. First we tested the accuracy of all three devices in a water bath with water temperature ranging from 0 to 40°C. Second, we evaluated the usefulness of the LifeChips and the modified iButtons for measuring Tb of small heterothermic mammals under field conditions...
May 2014: Journal of Thermal Biology
Rodolfo Ghirlando, Huaying Zhao, Andrea Balbo, Grzegorz Piszczek, Ute Curth, Chad A Brautigam, Peter Schuck
Accurate measurements of rotor temperature are critical for the interpretation of hydrodynamic parameters in analytical ultracentrifugation. We have recently developed methods for a more accurate determination of the temperature of a spinning rotor using iButton temperature loggers. Here we report that the temperature measured with the iButton on the counterbalance of a resting rotor, following thermal equilibration under high vacuum, closely corresponded to the temperature of the spinning rotor with a precision better than 0...
August 1, 2014: Analytical Biochemistry
Huaying Zhao, Andrea Balbo, Howard Metger, Robert Clary, Rodolfo Ghirlando, Peter Schuck
Sedimentation velocity is a classical method for measuring the hydrodynamic, translational friction coefficient of biological macromolecules. In a recent study comparing various analytical ultracentrifuges, we showed that external calibration of the scan time, radial magnification, and temperature is critically important for accurate measurements (Anal. Biochem. 440 (2013) 81-95). To achieve accurate temperature calibration, we introduced the use of an autonomous miniature temperature logging integrated circuit (Maxim Thermochron iButton) that can be inserted into an ultracentrifugation cell assembly and spun at low rotor speeds...
April 15, 2014: Analytical Biochemistry
Elisabet Ortiz-Tudela, Antonio Martinez-Nicolas, Javier Albares, Francesc Segarra, Manuel Campos, Eduard Estivill, Maria Angeles Rol, Juan Antonio Madrid
An integrated variable based on the combination of wrist Temperature, motor Activity and body Position (TAP) was previously developed at our laboratory to evaluate the functioning of the circadian system and sleep-wake rhythm under ambulatory conditions. However, the reliability of TAP needed to be validated with polysomnography (PSG). 22 subjects suffering from sleep disorders were monitored for one night with a temperature sensor (iButton), an actimeter (HOBO) and exploratory PSG. Mean waveforms, sensitivity (SE), specificity (SP), agreement rates (AR) and comparisons between TAP and sleep stages were studied...
March 14, 2014: Physiology & Behavior
Lars Brabyn, Peyman Zawar-Reza, Glen Stichbury, Craig Cary, Bryan Storey, Daniel C Laughlin, Marwan Katurji
The McMurdo Dry Valleys of Antarctica are the largest snow/ice-free regions on this vast continent, comprising 1% of the land mass. Due to harsh environmental conditions, the valleys are bereft of any vegetation. Land surface temperature is a key determinate of microclimate and a driver for sensible and latent heat fluxes of the surface. The Dry Valleys have been the focus of ecological studies as they arguably provide the simplest trophic structure suitable for modelling. In this paper, we employ a validation method for land surface temperatures obtained from Landsat 7 ETM + imagery and compared with in situ land surface temperature data collected from four transects totalling 45 iButtons...
April 2014: Environmental Monitoring and Assessment
Rodolfo Ghirlando, Andrea Balbo, Grzegorz Piszczek, Patrick H Brown, Marc S Lewis, Chad A Brautigam, Peter Schuck, Huaying Zhao
Sedimentation velocity (SV) is a method based on first principles that provides a precise hydrodynamic characterization of macromolecules in solution. Due to recent improvements in data analysis, the accuracy of experimental SV data emerges as a limiting factor in its interpretation. Our goal was to unravel the sources of experimental error and develop improved calibration procedures. We implemented the use of a Thermochron iButton temperature logger to directly measure the temperature of a spinning rotor and detected deviations that can translate into an error of as much as 10% in the sedimentation coefficient...
September 1, 2013: Analytical Biochemistry
Lauren L Pinault, Fiona F Hunter
Recent collection data indicate that at least four potential malaria vectors occupy more widespread distributions within the Andean highlands than in the past. Since habitat elimination is an important aspect of malaria control, it is vital to characterize larval habitats for Anopheles species within both lowland and highland sites. To that end, 276 sites within Ecuador were surveyed between 2008 and 2010. Characteristics of Anopheles-present sites for four species were compared to Anopheles-absent sites within the same geographical range and also to Anopheles-absent sites within a highland range representing potential future habitats...
June 2012: Journal of Vector Ecology: Journal of the Society for Vector Ecology
T S Pronina, B P Rybakov
Problem of the present work was studying age features circadian rhythm of temperature of a skin with application of a method "Termochron iButton". Day-night rhythm of a skin temperature at two age-grades was investigated: boys and girls of 8-9 years and young men and girls of 20-22 years. For this purpose monitoring temperature during 48 hours with an interval of registration 10 minutes has been lead. Are revealed authentic chronobiological differences: mesor temperatures above at girls, than at boys, and at young men, above, than at girls...
July 2011: Fiziologiia Cheloveka
M D Corbalán-Tutau, J A Madrid, J M Ordovás, C E Smith, F Nicolás, M Garaulet
The circadian rhythm of core body temperature is associated with widespread physiological effects. However, studies with other more practical temperature measures, such as wrist (WT) and proximal temperatures, are still scarce. The aim of this study was to investigate whether obesity is associated with differences in mean WT values or in its daily rhythmicity patterns. Daily patterns of cortisol, melatonin, and different metabolic syndrome (MetS) features were also analyzed in an attempt to clarify the potential association between chronodisruption and MetS...
May 2011: Chronobiology International
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