Abstract:
:Circadian rhythmicity of the structural morphometric model of rat endocrine pancreas has been studied in 24 Wistar female rats, four months old, kept in LD 12:12. The following parameters were evaluated: the volume fractions of nucleus and cytoplasm of exocrine cells, the size distribution and number in unit tissue volume of acinar cell nuclei, the mean nuclear diameter, the shape coefficient of glandular acini (that is the ratio acinar area/perimeter2 which indicates the shifting of structures from circularity). A statistically significant circadian rhythm was demonstrated for the shape coefficient of glandular acini. Results obtained in the present experiment are compared with data recorded in a previous study.
journal_name
Chronobiol Intjournal_title
Chronobiology internationalauthors
Sforza C,Morini M,Dolci C,Vizzotto L,Carandente Fdoi
10.3109/07420529009059148subject
Has Abstractpub_date
1990-01-01 00:00:00pages
377-82issue
5-6eissn
0742-0528issn
1525-6073journal_volume
7pub_type
杂志文章abstract::Lung cancer is the leading cause of cancer deaths worldwide. Both incidence and mortality of lung cancer are especially high in Hungary. Several investigations suggested recently that month of birth (MOB) is associated with the risks of several nonmalignant disorders as well as some malignant disorders. Only a few stu...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2011.596294
更新日期:2011-08-01 00:00:00
abstract::Seasonal Affective Disorder (SAD) is a condition of regularly occurring depressions in winter with a remission the following spring or summer. In addition to depressed mood, the patients tend to experience increased appetite and an increased duration of sleep during the winter. SAD is a relatively common condition, af...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.1081/cbi-120019310
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abstract::It has long been recognized that older shift workers may have shorter and more disturbed day sleeps between successive night shifts than their younger colleagues. This has given rise to considerable concern over the safety of aging shift workers because of the increasing age of the work force and increases in retireme...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.1080/07420520802106694
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journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2014.951054
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abstract::Concerns about health problems due to the increasing use of mobile phones are growing. Excessive use of mobile phones can affect the quality of sleep as one of the important issues in the health literature and general health of people. Therefore, this study investigated the relationship between the excessive use of mo...
journal_title:Chronobiology international
pub_type: 杂志文章,多中心研究
doi:10.3109/07420528.2015.1135933
更新日期:2016-01-01 00:00:00
abstract::Recently, we found that the reactivity of ambulatory blood pressure (BP) to everyday physical activities is highest in the morning. All participants in that study slept normally at night and freely chose their activity levels, which did not allow a separation of any circadian influence on the BP response from the effe...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420520802548044
更新日期:2008-11-01 00:00:00
abstract::The aim of the present study was to test whether serum concentrations of leptin in ewes vary with a daily rhythm. For this purpose, we examined 24 h serum leptin profiles of ewes exposed to natural photoperiodic conditions and subjected to two different feeding schedules (regular feeding and fasting). The results show...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420520500262989
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journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420520701531166
更新日期:2007-01-01 00:00:00
abstract::The mammalian central pacemaker, driving circadian rhythms in behavior, physiology, and metabolism, is located in the suprachiasmatic nuclei (SCN) of the hypothalamus. At the molecular level circadian clocks are based on a system of transcriptional/translational feedback loops oscillating with a period of about 24h. I...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1081/cbi-120022408
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abstract::The electronic health record (EHR) contains rich histories of clinical care, but has not traditionally been mined for information related to sleep habits. Here, we performed a retrospective EHR study based on a cohort of 3,652 individuals with self-reported sleep behaviors documented from visits to the sleep clinic. T...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420528.2018.1508152
更新日期:2018-11-01 00:00:00
abstract::Fatigue is an increasingly noted factor in road accidents. The ability to predict and be aware of impairment in terms of driving capability is important for potential legal liability and road safety. However, to date, there have been few studies that have investigated the accuracy of individuals in predicting how safe...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420520601083391
更新日期:2006-01-01 00:00:00
abstract::A diary-based instrument-the Social Rhythm Metric (SRM)-was used to assess the level of stability of daily social and behavioral rhythms in a group of 239 healthy subjects (112 male, 127 female) ranging in age from 20 to 89 years. Each subject completed the instrument for two consecutive weeks, which were averaged to ...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420529709001421
更新日期:1997-05-01 00:00:00
abstract::The objective of this study was to test the hypothesis that there is seasonal variation in the incidence of Stanford type A aortic dissection (SA-AoD) among patients admitted to our cardiovascular surgical service. A sinusoidal logistic regression model was used to analyze event data for 6081 calendar days. A cyclic p...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2014.933842
更新日期:2014-11-01 00:00:00
abstract::Multiple components of the circadian central clock are phosphoproteins, and it has become increasingly clear that posttranslational modification is an important regulator of circadian rhythm in diverse organisms, from dinoflagellates to humans. Genetic studies in Drosophila have identified double-time (dbt), a serine/...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.1081/cbi-100103963
更新日期:2001-05-01 00:00:00
abstract::This retrospective study tested the hypothesis that disease control and treatment-related toxicity in patients undergoing high-dose radiotherapy (HDRT) for prostate cancer varies in a circadian manner. Patients with localized prostate adenocarcinoma receiving HDRT (median 78 Gy) to the prostate and involved seminal ve...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2015.1130049
更新日期:2016-01-01 00:00:00
abstract::In the current study, we studied behavioral patterns, such as foraging, activity, standing, and laying in a population of cattle wandering on streets of Raipur city. We also determined the effects of four environmental factors (temperature, humidity, light, and noise intensities) on these behaviors. We recorded all fo...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420528.2019.1644345
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journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420528.2017.1399137
更新日期:2018-02-01 00:00:00
abstract::Intense artificial light can phase-shift circadian rhythms and improve performance, sleep, and well-being during shiftwork simulations. In real shiftworkers, however, exposure to sunlight and other time cues may decrease the efficacy of light treatment, and occupational and family responsibilities may make it impracti...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420529509064509
更新日期:1995-04-01 00:00:00
abstract::This study aimed to investigate the associations between individual difference factors (chronotype, Big Five, emotional competences) and perceived stress in French university students. In total, 362 students agreed to take part (Mage = 20.19 ± 1.75 years). Participants completed the Caen Chronotype Questionnaire, Big ...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420528.2020.1752705
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abstract::The authors estimated the benchmark durations (BMDs) and their 95% lower confidence limit (BMDL) for the reference duration of shiftwork for weight gain. A 14-yr prospective cohort study was conducted in male workers at a Japanese steel company (n = 7254) who had received annual health check-ups between 1991 and 2005....
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2010.516045
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abstract::High fat diet (HFD) consumption alters the synchronized circadian timing system resulting in harmful loss, gain or shift of transcriptional oscillations. The aryl hydrocarbon receptor (AhR) shares structural homology to clock genes, containing both PAS domains and basic helix-loop helix structural motifs, allowing for...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420528.2016.1256298
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abstract::A physiological dose of orally administered melatonin shifts circadian rhythms in humans according to a phase-response curve (PRC) that is nearly opposite in phase with the PRCs for light exposure: melatonin delays circadian rhythms when administered in the morning and advances them when administered in the afternoon ...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420529209064550
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abstract::Although several studies of glia have examined glial fibrillary acid protein (GFAP) and its relationship to the circadian rhythms of different organisms, they have not explored the daily GFAP oscillations in the putative pacemakers of the crayfish Procambarus clarkii or in other crustaceans. In this study we investiga...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2015.1071385
更新日期:2015-01-01 00:00:00
abstract::The appropriate time and place for sleep and waking are important factors for survival. Sleep and waking, rest and activity, flight and fight, feeding, and reproduction are all organized in relation to the day and night. A biological clock, the suprachiasmatic nucleus (SCN), synchronized by photic influences and other...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.1080/07420520500545961
更新日期:2006-01-01 00:00:00
abstract::Police officers are required to work irregular hours, which induces stress, fatigue, and sleep disruption, and they have higher rates of chronic disease and mortality. Cortisol is a well-known "stress hormone" produced via activation of the hypothalamic-pituitary-adrenal axis. An abnormal secretion pattern has been as...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2011.573112
更新日期:2011-05-01 00:00:00
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journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420528.2010.510788
更新日期:2010-09-01 00:00:00
abstract::Light and temperature cycles are the most important synchronizers of biological rhythms in nature. However, the relative importance of each, especially when they are not in phase, has been poorly studied. The aim of this study was to analyze the entrainment of daily locomotor activity to light and/or temperature cycle...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.1080/07420520600651065
更新日期:2006-01-01 00:00:00
abstract::The suprachiasmatic nucleus (SCN) of the hypothalamus controls circadian rhythmicity in mammals (for reviews, see Refs. 33 and 59). Responses modulated by the SCN are numerous and include rhythms in sleep/wake cycles, locomotor, gnawing and general activity, temperature, ingestive behavior, and rhythms of hormonal and...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.3109/07420529808998706
更新日期:1998-09-01 00:00:00
abstract::The circadian melatonin rhythm is highly reproducible and generally not easily altered. The few perturbations that are capable of significantly changing either the amplitude or the pattern of the 24-h melatonin rhythm are summarized herein. Aging alters cyclic melatonin production by decreasing the amplitude of the no...
journal_title:Chronobiology international
pub_type: 杂志文章,评审
doi:10.3109/07420529209064541
更新日期:1992-08-01 00:00:00
abstract::The circalunidian-clock hypothesis is a formulation describing the means by which the tide-associated rhythms of intertidal organisms are generated. The postulate was described in a 1995 article in this journal (12:299-310). A recent paper published here (13:153-62) by Prof. Ernest Naylor challenges the validity of th...
journal_title:Chronobiology international
pub_type: 杂志文章
doi:10.3109/07420529709001455
更新日期:1997-07-01 00:00:00