STRONTIUM-CALCIUM DISCRIMINATION BY THE HUMAN PLACENTA

Journal Article · Sat Oct 19 04:00:00 EDT 1963 · Nature

DOI:https://doi.org/10.1038/200269a0· OSTI ID:4163457

Rivera, J

Measurements were made of the Sr-- Ca discrimination in human beings by determining the concentration of stable Sr in seram from blood taken from the fetal and maternal sides of the placenta at birth. If the Ca concentration of the blood on either side of the placenta is assumed to be the same, then the ratio of the stable Sr concentration in the infant's serum to that of the mother is a measure of placental discrimination. The average concentration of stable Sr in the mothers' sera was found to be 0.10 mu g/ml with a standard deviation of 0.06 mu g/ml. The average concentration of stable Sr in the new-born infants' sera was 0.08 mu g/ml with a standard deviation of 0.04 mu g/m1. The ratios of the concentration of stable Sr in the serum of the newborn to that of the mother ranged from 0.26 to 2.53. The average and standard deviation of the ratios was 0.89 plus or minus 0.57. After removing two cases considered atypical, the average values were: mothers' sera 0.10 plus or minus 0.05 mu g/ml; new-borns' sera 0.07 plus or minus 0.03 mu g/ml; and new-born/mother sera of 0.82 plus or minus 0.38. (P.C.H.)

• Research Organization: U.S. Atomic Energy Commission, New York
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-001359
• OSTI ID: 4163457
• Journal Information: Nature, Journal Name: Nature Vol. Vol: 200
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AGE
BIOLOGY AND MEDICINE
BLOOD SERUM
CALCIUM
FETUSES
MAN
MEASURED VALUES
PLACENTA
PREGNANCY
QUANTITY RATIO
STRONTIUM
TISSUES
VARIATIONS