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The CO2 diffusion constant (Krogh's diffusion constant) has been estimated from the CO2 flux across layers with defined thickness under steady state conditions. At 22°C and in hemoglobin solutions with a concentration of 33 g% the diffusion constant for CO2 was found to be 3.3×10−4 cm2 min−1 atm−1. This value is about 40% of the diffusion constant for CO2(More)
Light microscopic, electron microscopic and histochemical studies were carried out on the segmental mesometrial arteries of non-pregnant guinea pigs and on pregnant ones at each of the nine weeks of gestation. Pregnant animals show drastic changes in arterial structure and dimensions. Hypertrophy and structural dilatation of the arterial wall are obvious.(More)
In the guinea-pig placenta which was artificially perfused on the fetal side while maternal placental blood flow was controlled, the placental transfer per mean transplacental concentration difference (the transfer coefficient TC) was determined for lactate. TC forl-lactate (TCLL) was compared to that ford-lactate (TCDL) and measured for various(More)
  • W. Moll
  • Bulletin of the Medical Library Association
  • 1971
The paper reviews the highlights of a four-week trial period (November 19-December 18, 1970) during which the Medical Library of the University of Virginia experimented with a new remote-access bibliographical control and retrieval system via its TWX machine. The system, called AIM-TWX, was sponsored by the Lister Hill National Center for Biomedical(More)
Uteroplacental arteries of 4 rhesus monkeys were cannulated at their myometrical portions and perfused with dextran solutions and blood. Pressure-flow curves were obtained for the spiral artery and the related intervillous space, i.e. for the functional cotyledonary unit of the haemochorial villous placenta. For a flow of 3 ml·min−1, which is probably the(More)
In order to study the lactic acid transfer in a hemochorial placenta, the placenta of the guinea-pig was perfusedin situ through the umbilical circulation with a colloidal solution containingl(+)-lactate and bicarbonate in various concentrations. It was found that the transfer rates of lactate and bicarbonate were proportional to the respective(More)