Use of bioelectrical impedance analysis to estimate body fluid compartments after acute variations of the body hydration level.

Physiological measurements including body mass, plasma osmolality, natremia, plasma volume measured by Evans Blue dilution, and total body water (TBW) and extracellular water (ECW) volumes estimated by bioelectrical impedance analysis (BIA) were recorded in eight healthy young Caucasian subjects before and after acute variations of their body hydration state on four separate occasions: 1) euhydration or control trial (C); 2) heat-induced dehydration of 2.8% body mass (D); 3) exercise-induced dehydration of 2.8% body mass (E); and 4) glycerol-hyperhydration (H).

[The effect of hypervitaminosis D3 on the bones of the chicken. 2. Electron microscopic studies].

In an experiment of 36 days duration 46 one-day-old chicks were divided into 5 groups and fed with different concentrations of vitamin D3. The animals of the group which lacked vitamin D3, showed the typical rachitic lesions. After a 15 days lack of vitamin D3 the chicks of another group were treated with standard food (2000 I.

The time-course of rod-cone interaction.

The time-course of rod-cone interaction (change of scotopic sensitivity caused by photopic background stimulation) was measured in the presence of briskly exchanged, scotopically matched, 490- and 630-nm background disks. In all conditions, interaction rose and fell quickly with changes of photopic stimulation. When the background was a small 0.

The coordination of eye and head movements during early infancy: a selective review.

A review of work dealing with the human infant's ability to use coordinated eye and head movements is presented. Primary emphasis is given to performance under two conditions: (1) the shifting of fixation to a visual stimulus in the periphery; and (2) the use of eye movements to maintain fixation by compensating for the effects of externally imposed head movements.