Diurnal Variation in Response to Intravenous Glucose

Diurnal variation in the diuretic response to ingested water.

In normal individuals the renal excretion of water, sodium, potassium, and uric acid is less at night than during the day. This diurnal variation persists when no food or fluids are taken as well as when identical quantities of food, fluid, and electrolyte are ingested at regular intervals throughout the 24-hour period and is not easily altered by changes in the cycle of sleep and activity (1-1...

Diurnal variation in the nitrate content of parsley foliage

The diurnal fluctuation of nitrate concentration in the foliage of three parsley subspecies (plain-leafed, curly-leafed and turnip rooted parsley) cultivated in the spring and autumn of two consecutive years was examined. Nitrogen was applied at 30 (Control), 75, 150, 300 mg kg-1 in both years, but with the addition of 450 mg kg-1 in year 2. Harvest was carried out at 08:30, 12:30 and 17:30 on ...

Variation in the response of barley cultivars to nirrogen fertilizer

Diurnal variation in asthma.

It has been known for many hundreds of years that asthma is worse at night. Sir John Floyer in his classic 'Treatise of the Asthma' (1698) wrote: 'I have observed the fit always to happen after Sleep in the Night when Nerves are filled with windy Spirits, and the heat of the bed has rarified the Spirits and Humours'. l Although these exacerbations are a well established clinical phenomenon, the...

Absence of diurnal variation in visceromotor response to colorectal distention in normal Long Evans rats.

BACKGROUND Enhanced colorectal sensitivity (i.e. visceral hypersensitivity) is thought to be a pathophysiological mechanism in irritable bowel syndrome (IBS). In healthy men a circadian variation in rectal perception to colonic distention was described. Disturbed day and night rhythms, which occur in shift work and trans meridian flights, are associated with the prevalence of IBS. This raises t...