Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Diurnal variations in multi-sensor wearable-derived sleep characteristics in morning- and evening-type shift workers under naturalistic conditions
Chronobiol Int. 2021 Jul 18:1-12. doi: 10.1080/07420528.2021.1941074. Online ahead of print.ABSTRACTConsumer-grade, multi-sensor, rest-activity trackers may be powerful tools, to help optimize rest-activity management in shiftwork populations undergoing circadian misalignment. Nevertheless, performance testing of such devices under field conditions is scarce. We previously validated Fitbit Charge 2TM against home polysomnography and now evaluated the potential of this device to document differences in rest-activity behavior, including sleep macrostructure, in first-responder shift workers in an operational setting. We cont...
Source: Chronobiology International - July 19, 2021 Category: Biology Authors: Ian Clark Benjamin Stucky Yasmine Azza Patrick Schwab Stefan M üller Daniel Weibel Daniel Button Walter Karlen Erich Seifritz Birgit Kleim Hans-Peter Landolt Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Effect of periodic social interaction and odour presentation of same and opposite-sex conspecifics on free-running mice
Chronobiol Int. 2021 Jul 1:1-12. doi: 10.1080/07420528.2021.1941075. Online ahead of print.ABSTRACTSocial interaction, a non-photic cue, plays a role in the synchronization of circadian rhythm under constant environmental conditions. However, little is known about the effect of sex-specific interaction and sex-specific odor on the free-running circadian clock of mice. Hence, in the present study, we investigated the effect of social interaction and odor presentation of same and opposite-sex conspecifics on the free-running rhythm of mice. In this investigation, stranger and dummy mice (saturated with either male- or female...
Source: Chronobiology International - July 1, 2021 Category: Biology Authors: Pratishtha Sonker Rajeev Cherukalady Muniyandi Singaravel Source Type: research

Elevated asleep blood pressure and non-dipper 24h patterning best predict risk for heart failure that can be averted by bedtime hypertension chronotherapy: A review of the published literature
Chronobiol Int. 2021 Jun 30:1-20. doi: 10.1080/07420528.2021.1939367. Online ahead of print.ABSTRACTSeveral prospective studies consistently report elevated asleep blood pressure (BP) and blunted sleep-time relative systolic BP (SBP) decline (non-dipping) are jointly the most significant prognostic markers of cardiovascular disease (CVD) risk, including heart failure (HF); therefore, they, rather than office BP measurements (OBPM) and ambulatory awake and 24 h BP means, seemingly are the most worthy therapeutic targets for prevention. Published studies of the 24 h BP pattern in HF are sparse in number and of limited sample...
Source: Chronobiology International - June 30, 2021 Category: Biology Authors: Ram ón C Hermida Artemio Moj ón Jos é R Fernández Ram ón G Hermida-Ayala Juan J Crespo Mar ía T Ríos Manuel Dom ínguez-Sardiña Alfonso Otero Michael H Smolensky Source Type: research

Locomotor activity rhythm in catfish Heteropneustes fossilis as a function of shoal size under different light regimens
We examined the circadian locomotor activity rhythm of catfish Heteropneustes fossilis either singly housed (SS1) or in shoals of four (SS4) and six (SS6) under different light regimens. We carried out the study sequentially under LD1 (12:12), constant darkness (DD), LD2, continuous light (LL), LD3, and DL (12:12). Each condition was for at least 10-12 consecutive days. We analyzed the time-series data by employing Cosinor rhythmometry to detect circadian rhythm characteristics in locomotor activity at a fixed time window with a τ = 24 h. Results indicated that singly housed or shoals exhibited statistically significant (p
Source: Chronobiology International - June 28, 2021 Category: Biology Authors: Pratibha Kujur Atanu Kumar Pati Arti Parganiha Source Type: research

Locomotor activity rhythm in catfish Heteropneustes fossilis as a function of shoal size under different light regimens
We examined the circadian locomotor activity rhythm of catfish Heteropneustes fossilis either singly housed (SS1) or in shoals of four (SS4) and six (SS6) under different light regimens. We carried out the study sequentially under LD1 (12:12), constant darkness (DD), LD2, continuous light (LL), LD3, and DL (12:12). Each condition was for at least 10-12 consecutive days. We analyzed the time-series data by employing Cosinor rhythmometry to detect circadian rhythm characteristics in locomotor activity at a fixed time window with a τ = 24 h. Results indicated that singly housed or shoals exhibited statistically significant (p
Source: Chronobiology International - June 28, 2021 Category: Biology Authors: Pratibha Kujur Atanu Kumar Pati Arti Parganiha Source Type: research

Locomotor activity rhythm in catfish Heteropneustes fossilis as a function of shoal size under different light regimens
We examined the circadian locomotor activity rhythm of catfish Heteropneustes fossilis either singly housed (SS1) or in shoals of four (SS4) and six (SS6) under different light regimens. We carried out the study sequentially under LD1 (12:12), constant darkness (DD), LD2, continuous light (LL), LD3, and DL (12:12). Each condition was for at least 10-12 consecutive days. We analyzed the time-series data by employing Cosinor rhythmometry to detect circadian rhythm characteristics in locomotor activity at a fixed time window with a τ = 24 h. Results indicated that singly housed or shoals exhibited statistically significant (p
Source: Chronobiology International - June 28, 2021 Category: Biology Authors: Pratibha Kujur Atanu Kumar Pati Arti Parganiha Source Type: research

Psychometric Properties of the Turkish version of the Morningness - Eveningness Stability Scale improved (MESSi) in Adolescents
This study shows that Turkish version of MESSi is valid and reliable for use in adolescents. Three-factor MESSi provides an advantage over other chronotype scales in adolescence since it includes DI subscale as well as MA and EV subscales. Psychometric results were supported by other chronotype scales and clinical features such as sleep, affect, and personality.PMID:34167383 | DOI:10.1080/07420528.2021.1938597 (Source: Chronobiology International)
Source: Chronobiology International - June 25, 2021 Category: Biology Authors: Hakan Öğütlü Sabide Duygu Uygun Christoph Randler Source Type: research

Psychometric Properties of the Turkish version of the Morningness - Eveningness Stability Scale improved (MESSi) in Adolescents
This study shows that Turkish version of MESSi is valid and reliable for use in adolescents. Three-factor MESSi provides an advantage over other chronotype scales in adolescence since it includes DI subscale as well as MA and EV subscales. Psychometric results were supported by other chronotype scales and clinical features such as sleep, affect, and personality.PMID:34167383 | DOI:10.1080/07420528.2021.1938597 (Source: Chronobiology International)
Source: Chronobiology International - June 25, 2021 Category: Biology Authors: Hakan Öğütlü Sabide Duygu Uygun Christoph Randler Source Type: research

Psychometric Properties of the Turkish version of the Morningness - Eveningness Stability Scale improved (MESSi) in Adolescents
This study shows that Turkish version of MESSi is valid and reliable for use in adolescents. Three-factor MESSi provides an advantage over other chronotype scales in adolescence since it includes DI subscale as well as MA and EV subscales. Psychometric results were supported by other chronotype scales and clinical features such as sleep, affect, and personality.PMID:34167383 | DOI:10.1080/07420528.2021.1938597 (Source: Chronobiology International)
Source: Chronobiology International - June 25, 2021 Category: Biology Authors: Hakan Öğütlü Sabide Duygu Uygun Christoph Randler Source Type: research

Circadian rhythms in cardiac metabolic flexibility
Chronobiol Int. 2021 Jun 23:1-14. doi: 10.1080/07420528.2021.1939366. Online ahead of print.ABSTRACTNumerous aspects of cardiovascular physiology (e.g., heart rate, blood pressure) and pathology (e.g., myocardial infarction and sudden cardiac death) exhibit time-of-day-dependency. In association with day-night differences in energetic demand and substrate availability, the healthy heart displays remarkable metabolic flexibility through temporal partitioning of the metabolic fate of common substrates (glucose, lipid, amino acids). The purpose of this review is to highlight the contribution that circadian clocks provide towa...
Source: Chronobiology International - June 24, 2021 Category: Biology Authors: Martin E Young Mary N Latimer Source Type: research

Circadian rhythms in cardiac metabolic flexibility
Chronobiol Int. 2021 Jun 23:1-14. doi: 10.1080/07420528.2021.1939366. Online ahead of print.ABSTRACTNumerous aspects of cardiovascular physiology (e.g., heart rate, blood pressure) and pathology (e.g., myocardial infarction and sudden cardiac death) exhibit time-of-day-dependency. In association with day-night differences in energetic demand and substrate availability, the healthy heart displays remarkable metabolic flexibility through temporal partitioning of the metabolic fate of common substrates (glucose, lipid, amino acids). The purpose of this review is to highlight the contribution that circadian clocks provide towa...
Source: Chronobiology International - June 24, 2021 Category: Biology Authors: Martin E Young Mary N Latimer Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

The impact of chronotype on circadian rest-activity rhythm and sleep characteristics across the week
Chronobiol Int. 2021 Jun 16:1-16. doi: 10.1080/07420528.2021.1937197. Online ahead of print.ABSTRACTCircadian rhythms are maintained by a complex "system of systems" that continuously coordinates biological processes with each other and the environment. Although humans predominantly entrain to solar time, individual persons vary in their precise behavioral timing due to endogenous and exogenous factors. Endogenous differences in the timing of individual circadian rhythms relative to a common environmental cue are known as chronotypes, ranging from earlier than average (Morningness) to later than average (Eveningn...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Chris Brooks Nina Shaafi Kabiri Jaspreet Bhangu Xuemei Cai Eve Pickering Michael Kelley Erb Sanford Auerbach Paolo Bonato Tara L Moore Farzad Mortazavi Kevin Thomas Source Type: research

Effect of the lockdown on diurnal patterns of emotion expression in Twitter
Chronobiol Int. 2021 Jun 16:1-20. doi: 10.1080/07420528.2021.1937198. Online ahead of print.ABSTRACTDiurnal variation in psychometric indicators of emotion found in Twitter content has been known for many years. The degree to which this pattern depends upon different environmental zeitgebers has been difficult to determine. The nationwide lockdown in the United Kingdom in spring 2020 provided a unique government-mandated experiment to observe the temporal variation of psychometric indicators in the absence of certain specific social rhythms related to commuting and workplace social activities as well as many normal home-ba...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Sheng Wang Stafford Lightman Nello Cristianini Source Type: research

A leptin sandwich ELISA kit unusable for domestic animals
Chronobiol Int. 2021 Jun 16:1-2. doi: 10.1080/07420528.2021.1941076. Online ahead of print.ABSTRACTAn instance of hormone assay method flaw is reported. In this journal Chronobiology International, two papers appeared in which an ELISA method for human serum or plasma was utilized for blood serum of horse and sheep, respectively. From our testing, it is resulted that such method does not work at all for equine, sheep and other animal species. The use of commercial hormone assay kits for heterologous species always needs a careful validation procedure. First, the same hormone molecule by different species could not share en...
Source: Chronobiology International - June 17, 2021 Category: Biology Authors: Luca Todini Alessandro Malfatti Source Type: research

Heart rate variability and chronotype - a systematic review
Chronobiol Int. 2021 Jun 16:1-11. doi: 10.1080/07420528.2021.1939363. Online ahead of print.ABSTRACTThere is a scarcity of evidence on the association between heart rate variability (HRV) and chronotype, i.e., morningness and eveningness. The aim of this systematic review was to examine the association between chronotype, HRV, mood and stress response. We searched PubMed, Web of Science, Scopus, Cinahl, PsycINFO and Google Scholar for peer-reviewed articles published in English between January 2000 and June 2020. A total of 11 articles met the inclusion criteria and were on study population, assessment of HRV and chronotyp...
Source: Chronobiology International - June 16, 2021 Category: Biology Authors: Kirsi Honkalampi Susanna J ärvelin-Pasanen Mika P Tarvainen Terhi Saaranen Anneli Vauhkonen Saana Kupari Merja Perki ö-Mäkelä Kimmo R äsänen Tuula Oksanen Source Type: research

Differential response of diurnal and nocturnal mammals to prolonged altered light-dark cycle: a possible role of mood associated endocrine, inflammatory and antioxidant system
Chronobiol Int. 2021 Jun 15:1-13. doi: 10.1080/07420528.2021.1937200. Online ahead of print.ABSTRACTThe circadian system maintains internal 24 h oscillation of behavior and physiology, and its misalignment with external light-dark (LD) cycle results in negative health outcomes. In order to elucidate the effect of prolonged constant condition and the differences in the response between nocturnal and diurnal species, we studied the effects of constant light (LL) and constant darkness (DD) on a diurnal (squirrel) and a nocturnal (mouse) rodent species, focusing on the endocrine, inflammatory and antioxidant systems associated...
Source: Chronobiology International - June 15, 2021 Category: Biology Authors: Ruchika Kumari Vivek Verma Noga Kronfeld-Schor Muniyandi Singaravel Source Type: research