Biomedical subjects
Publications and source records attributed to W P Meeuwsen.
Number and sex of offspring were determined in a group of 7,841 randomly selected blood donors who were screened for the delta F508 mutation. We did not find any evidence for differences in number or sex ratio of offspring between delta F508 carriers and non-carriers.
Explore the source record for details and available documents.
In this study the influence of epinephrine (E) on oxygen consumption, overall energy metabolism, and substrate utilization in rats has been investigated. Therefore E was infused at rates of 20, 35, and 50 ng/min for 40 min. Infusion of the solvent, saline, served as control experiment. Before, during, and after the infusion, VO2, as parameter for total metabolism, and RQ, as parameter for substrate utilization, were determined using an open circuit. In addition blood samples were taken for determination of blood glucose, plasma free fatty acids (EFA) and plasma insulin concentrations. The results show a rise in VO2 and blood glucose during infusion of E. Plasma FFA concentrations were elevated during infusion of E and of saline. Plasma insulin decreased when E was administered. RQ values were increased when E was infused at rates of 35 and 50 ng/min. The results suggest that E can influence the ratio in which glucose and FFA are utilized. This influence seems to be excerpted indirectly by influencing the availability of the substrates, rather than directly, by influencing utilization.
The possible influence of the body fluid compartments at birth on postnatal weight loss was studied in normal term negroid infants when on a standardized oral fluid, sodium and energy regimen during the first three days of life. Measurements of plasma volume (PV), total body water (TBW), and extracellular water (ECW) were performed simultaneously on vaginally-born infants on the first day of life, by using a triple indicator (Evans blue, deuterium oxide and sucrose) single injection dilution technique. PV was 54 +/- 7 ml/kg (N = 9), TBW was 751 +/- 50 ml/kg (N = 13) and ECW was 311 +/- 61 ml/kg (N = 13) (mean +/- S.D.). Postnatal weight loss (3.7% of birth weight) occurred during the first two days. The postnatal weight loss was not related to any of the body water compartments. However, there was a highly significant correlation with the (cumulative) urine water excretion (r = 0.833, P less than 0.001 on day 1, with similar values for days 1 and 2).