Abstract
Total and ultrafiltered calcium, total and inorganic phosphorus in blood serum, and diurnal secretion of calcium and phosphorus in urine were determined in humans before (baseline data) and on days 30, 60, and 105 of isolation. Calcium and phosphorus contents in hair were determined before isolation and on day 105 of the experiment. The measurements were performed by means of inductively coupled plasma atomic emission spectrometry. Levels of total and ultrafiltered calcium, total and inorganic phosphorus, as well as urine calcium and phosphorus in daily urine and hair varied within admissible physiological ranges at all stages of investigation. Shifts in the serum calcium and phosphorus balance, accounted for by their physiologically active forms, is an immediate reaction to the experimental conditions. Calcium and phosphorus levels deviated from the baseline values after 30 days of isolation and then remained stable util day 105.
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