Long-term memory is widely believed to depend on either detailed recollection or nondetailed familiarity. Although familiarity is generally thought to be a continuous/graded process, the nature of recollection is currently under debate. The present review considers evidence bearing on three separate debates on recollection. The first debate has focused on whether each medial temporal lobe subre...

The perirhinal cortex (PRh) is widely accepted as having an important role in object recognition memory in humans and animals. Contrary to claims that PRh mediates declarative memory exclusively, previous evidence suggests that PRh has a role in the perceptual processing of complex objects. In the present study, we conducted an examination of the possible role of PRh in perceptual function in r...

A spectrofluorometric method is described for the determination of germanium(IV) based on its complexation reaction with quercetin in presence of Brij-35. The fluorescence is monitored at 552 nm with excitation at 432 nm. The pH, quercetin and Brij-35 concentrations were optimized simultaneously using the response surface methodology from sequential experimental three-variable Doehlert designs....

The present study compared the impact of perirhinal cortex lesions on tests of object recognition. Object recognition was tested directly by looking at the preferential exploration of novel objects over simultaneously presented familiar objects. Object recognition was also tested indirectly by presenting just novel objects or just familiar objects, and recording exploration levels. Rats with pe...

Two experiments examined the effects of perirhinal cortex and hippocampal neurotoxic lesions on the retention of allocentric information. Perirhinal (Expt. 1) and hippocampal rats (Expt. 2) were trained on an allocentric task until they reached a performance equal to that of the control groups. Results showed that 24 days after acquisition, during a retraining period, only the hippocampal rats ...

We analysed the biodiversity of ascidians in two areas located in southern and northern Chile: Punta Arenas in the Strait of Magellan (53o latitude, subantarctic) and Coquimbo (29o latitude, temperate). The oceanographic features of the two zones are markedly different, with influence of the Humboldt Current in the north, and the Cape Horn Current System, together with freshwater influxes, in t...