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Biomedical subjects

A Bouzas

Publications and source records attributed to A Bouzas.

At least 19 recordsLinked to original sources
PubMed1983

Zinc, cobalt and selenium concentrations in the premature and full-term newborn eye.

Zinc, cobalt and selenium concentrations were determined in tunics, vitreous and lens of the eyes of 17 infants who died during the neonatal period. Significantly higher concentrations of the measured elements were found in the vitreous. The tunics contained more zinc and cobalt than the lens, while the latter contained more selenium.

Cobalt↗
PubMed1980

Context dependent changes in the reinforcing strength of schedule-induced drinking.

Previous experiments show that the opportunity to engage in schedule-induced responding is reinforcing. In this experiment, the reinforcing strength of schedule-induced drinking was measured. Four rats were trained on a concurrent-chain schedule. The two terminal links provided food pellets on identical fixed-time schedules. In addition, one terminal link also provided the opportunity to press a button that operated a water dipper. In this link, the rats showed polydipsic drinking. Button-pressing rate for polydipsic drinking was a bitonic function of pellet rate, and it was possible to describe the relationship with a slightly modified version of the matching equation for primary reinforcement. This equation also closely fit the data from other studies. Initial-link response rates, however, did not appear to be influenced by the availability of water in the terminal links. Control conditions suggested that the reinforcing strength of polydipsia was strongly bound to the context provided by periodic food reinforcement.

Animals↗