This paper uses dissipation values derived from UARS/HRDI observations in a recently published diurnal-tide model. These model structures compare quite well with the UARS/HRDI observations with respect to the annual variation of the diurnal tidal amplitudes and the size of the amplitudes themselves. It is suggested that the annual variation of atmospheric dissipation in the mesosphere-lower the...

this study assesses the air quality of two urban localities, fahaheel and al-rabia city, to assistlocal authorities to generate information supporting the planning of pollution control strategies to keeppollutants within safe limits in the long run. in terms of diurnal and seasonal variations, almost all measured pollutants exhibited two peaks: one in the morning and another in the afternoon. t...

The diurnal variation in cholesterol synthesis exhibited by rat liver has been examined in fed, fasted, and adrenalectomized animals. Fasting for 3 days caused a lowering of the rate of synthesis but did not abolish the diurnal rhythm. Adrenalectomy abolished the diurnal variation, and caused synthesis to remain at a uniformly high level. We suggest that corticosterone may play an essential rol...

The present study examined the relationship between ageing, physical function and the diurnal rhythms of cortisol and dehydroepiandrosterone (DHEA). Participants were 36 community dwelling older adults aged between 65 and 86 years old. Salivary cortisol and DHEA were measured over the course of one day: immediately upon awakening, 30 min later, and then 3 h, 6 h, 9 h and 12 h post-awakening. Pa...

Disputable questions of modern somnology, the neuroscience branch involving wakefulness-sleep cycle regulation, circadian and diurnal rhythms and other related problems, are regarded. Among them are the questions of the extent of similarity of the alternation of active-rest periods in the nematode, fruit fly, zebrafish and other simple model organisms to the waking-sleeping rhythm in warm-blood...

In five healthy mongrel female cats used, four cats (Cats 1-4) were experimentally inoculated with 100-123 larvae (L(3)) of Dirofilaria immitis. Cat 5 was an uninfected control. Only Cat 1 became microfilaremic on Day 201 after inoculation and the diurnal changes in the microfilaria population were monitored every 2 h for 24 h on Day 237 when a sufficient number of microfilaria were detected in...

The focal point of this limited review is bioenergetic research conducted in the Biological Engineering Research Unit at the U.S. Meat Animal Research Center (MARC), using recently developed instrumentation and analytical techniques. The dynamics of observed thermoregulatory responses in cattle to thermal heat load challenges are explored, with an emphasis on physiological and behavioral parame...

In recent years the phenomenon of 24 hr. periodicity in animals has attracted considerable attention. Diurnal rhythms have been reviewed by Welsh (1938), Park (1940) and Calhoun (1944), and present many interesting physiological and ecological problems. It is evident that they are common and manifest in diverse ways. Park, Lockett & Myers (1931), in a short study of nocturnal ecology among fore...

[1] Infrared (IR) land surface emissivity (LSE) with a high temporal and spatial resolution is very important for deriving other products using IR radiance measurements as well as assimilating IR radiances in numerical weather prediction (NWP) models over land. Retrieved from various satellite instruments, many LSE databases are available for operational and research use. Most are updated only ...