Albert G. Costa

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GH immunolike reactivity was measured by RIA and IRMA tests in the extracts of tissues from human fetuses (8-32 weeks) and adults. For some fetal tissues a comparison was made with the T4 values obtained in a previous study. Both hormones were already measurable in peripheral tissues at 8 weeks of gestation. The increase in GH was faster than for T4 and it(More)
This paper overviews path planning methods, systematic versus probabilistic for robotic demining, and a robot development project. We outline a complete sensor-based coverage algorithm that uses an exact cellular decomposition method. To decrease coverage duration, we introduce a probabilistic method that takes advantage of a priori known mine patterns.(More)
Well-preserved thyroid glands from 28 fetuses 22-34 weeks of gestational age and from 4 term newborns who survived at most 12 days were examined to study thyroid development in late intrauterine life. Total iodine thyroglobulin (Tg), T4, T3 and rT3 were assayed before and after hydrolysis with pronase. In the same maternity unit the cord-serum of 25 healthy(More)
The exact period when glucocorticoid receptors (GR) appear in human embryos is unknown, however their presence is acknowledged in target tissues before the fetal adrenal cortex secretes cortisol. Determining when GR develop could serve as an index of the importance of glucocorticoids in the morphological and functional development of tissues. The aim of(More)
This study was intended to quantify T3 and T4 in various human tissues at different stages of gestation as a contribute in the evaluation of the role of thyroid hormones in fetal development, particularly before the maturation of fetal thyroid function. Moreover, for a better comprehension of the influence of thyroid hormone status in tissues, the study was(More)
The aim of this study was to evaluate the effect of vaginal delivery on both ACTH and catecholamines (DA, NE, E) secretion in the mother, the fetus (umbilical artery) and the newborn. Blood samples were obtained from 19 normal pregnant women and the corresponding umbilical cords, and from the newborns. Seventeen normal nonpregnant women, matched for age and(More)
BACKGROUND The graft shortages make multiorgan procurements mandatory. We describe the results of a regional procurement team policy that has been employed over a 5-year period. METHODS Three hundred forty-three multiorgan procurements were performed by a regional team using an en bloc harvesting method. RESULTS Among 1374 grafts procured, none was(More)