Since the early observations of tidal rhythms in Convoluta (Gamble & Keeble, 1903, 1904) and in Actinia (Bohn, 1906) much experimental work on rhythms of behaviour in intertidal animals has been concerned with such phenomena as oxygen uptake and colour changes. Gompel (1937) demonstrated tidal rhythms of oxygen consumption in Patella, MytUus and Hatiotis and similar rhythms have been shown more...

OBJECTIVE Millions of adults in the United States travel abruptly across time zones each year. Nevertheless, the impact of traveling over relatively short distances (across 3 or fewer time zones) on diurnal patterning of typical physiological response patterns has yet to be studied in a large, epidemiological sample. DESIGN The current research focuses on 764 middle-aged men comparing variati...

BACKGROUND The nocturnal endogenous melatonin rise, which is associated with the onset of sleep propensity, is absent in haemodialysis patients. Information on melatonin rhythms in chronic kidney disease (CKD) is limited. Clear relationships exist between melatonin, core body temperature and cortisol in healthy subjects. In CKD, no data are available on these relationships. The objective of the...

Circadian rhythmicity can be important in the pathophysiology, diagnosis, and treatment of clinical disease. Due to the difficulties in conducting the necessary experimental work, it remains unknown whether approximately 24-h changes in pathophysiology or symptoms of many diseases are causally linked to endogenous circadian rhythms or to other diurnal factors that change across the day, such as...

Rats, confined either to Skinner boxes or to activity wheels, were fed at regularly scheduled feeding times which were either diurnal, i.e., every 24 hr., or a-diurnal, i.e., every 19 or 29 hr. Even though the a-diurnal Ss had been born, reared, and tested under 19or 29-hr, schedules to provide further support for the anticipation of feeding, they failed to show such an effect. The fact that th...

AIMS: To examine whether smoking habits, nicotine dependence (ND) and plasma cotinine levels differ by diurnal type. DESIGN: Data originated from the national FINRISK 2007 survey. Regression analyses were calculated to examine the association between diurnal type and smoking status, ND, and nicotine intake. PARTICIPANTS: 7091 FINRISK participants with smoking and diurnal type information and ...

OBJECTIVES To investigate the correlation and agreement between the intraocular pressure peaks detected during the water drinking test and the modified diurnal tension curve in untreated glaucomatous eyes. INTRODUCTION It has been suggested that the intraocular pressure peaks detected during the water drinking test predict the peaks observed during a 24-hour diurnal tension curve. A more feas...

[1] The surface skin temperature is a key parameter at the land-atmosphere interface. An accurate description of its diurnal cycle would not only help estimate the energy exchanges at the interface, it would also enable an analysis of the global surface skin diurnal cycle and its variability within the last 20 years. This study is based on the 3-hourly surface skin temperature estimated by the ...

The low-molecular weight secretory phospholipase A2alpha (CssPLA2alpha) and beta (CsPLA2beta) cloned in this study exhibited diurnal rhythmicity in leaf tissue of Citrus sinensis. Only CssPLA2alpha displayed distinct diurnal patterns in fruit tissues. CssPLA2alpha and CsPLA2beta diurnal expression exhibited periods of approximately 24 h; CssPLA2alpha amplitude averaged 990-fold in the leaf blad...

Position and intensity data from the International Best Track Archive for Climate Stewardship (IBTrACS) are combined with global, gridded precipitation estimates from the Tropical Rainfall Measuring Mission (TRMM)Multisatellite PrecipitationAnalysis (TMPA) for the period 1998–2013 to study the diurnal cycle of precipitation in tropical cyclones. The comprehensive global coverage and large sampl...