Giacomo Meschia

Blood Plasma Proteins in Fetal Goats and Sheep.

Summary Electrophoretic separation of fetal and maternal plasma proteins in goats and sheep revealed that the fetal plasma lacks γ-globulins and exhibits an additional peak in the area of α1-globulins. This peak probably corresponds to fetuin. Quantitative conditions of fetal plasma proteins seem to depend largely on age of the fetus. In goats, the percentage of total plasma proteins and of plasma albumin increases; percentage of fetuin decreases with the progressing age of the fetus. The remaining plasma proteins do not seem to be affected. In fetal sheep the percentages of total plasma proteins, plasma albumin and probably of β-globulins increase; levels of fetuin and α1-globulins decrease with age. The percentage of α2-globulins remains unaffected.

Alveolar PCO2 and PO2 in pregnant and nonpregnant women at high altitude

Abstract The alveolar P CO 2 of a group of pregnant women residing at an altitude of 14,500 feet was compared with that of a group of nonpregnant women residing at the same altitude. Pregnancy is associated with a hyperventilatory effect over and above the hyperventilation already existent on the basis of residence at altitude.

Nitrous oxide transfer from mother to fetus in sheep and goats

Abstract Following administration of nitrous oxide to maternal sheep and goats, the uterine and umbilical circulations were sampled repeatedly at selected intervals and the N 2 O levels in the blood of the fetus in utero compared with those of the mother. Additional measurements were made on amniotic and allantoic fluids. The results demonstrated that the concentrations of nitrous oxide in the uterine and umbilical veins were nearly equal under good physiologic conditions. These observations agree with the hypothesis that the placentas of sheep and goats simulate concurrent exchange systems.