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DNA is generally considered to be chemically rather inert, but self-cleaving DNA molecules have recently been isolated from in vitro selection experiments; their properties advance the idea that, like RNA, DNA can serve as both a catalyst and an information storage medium.
This review will consider how spontaneous tasks have been applied alongside neuroscientific techniques to test complex forms of recognition memory for objects and their environmental features, e.g. the spatial location of an object or the context in which it is presented. We discuss studies that investigate the roles of the perirhinal cortex and the hippocampus in recognition memory using stand...
Face recognition is supposed to be fast. However, the actual speed at which faces can be recognized remains unknown. To address this issue, we report two experiments run with speed constraints. In both experiments, famous faces had to be recognized among unknown ones using a large set of stimuli to prevent pre-activation of features which would speed up recognition. In the first experiment (31 ...
Recognising objects relies on highly dynamic, interactive brain networks to process multiple aspects of object information. To fully understand how different forms of information about objects are represented and processed in the brain requires a neurocognitive account of visual object recognition that combines a detailed cognitive model of semantic knowledge with a neurobiological model of vis...
Anatomic and behavioral evidence shows that TE and perirhinal cortices are two directly connected but distinct inferior temporal areas. Despite this distinctness, physiological properties of neurons in these two areas generally have been similar with neurons in both areas showing selectivity for complex visual patterns and showing response modulations related to behavioral context in the sequen...
The APA Awards for Distinguished Scientific Early Career Contributions to Psychology recognize psychologists who have demonstrated excellence early in their careers and have held a doctoral degree for no more than 9 years. One of the 2017 award winners is Sara N. Burke, for her groundbreaking work on the impact of age on the perirhinal cortex and associative memory and perception processes. Bur...
hepatomas have demonstrated that a spectrum of such tumors exists with varying degrees of change from the parent hepatocyte (26—30). Such hepatocarcinomas as the Morris 5123 (18) and Reuber H-35 (34), for instance, resemble the parent tissue to a marked degree both morphologically and biochemically (27), and thus fall in the category termed “minimaldeviation hepatomas― by Potter (31). On ...
Previous experiments demonstrate a normal decline in unconditioned responding in rats with perirhinal cortex lesions but attenuated performance on spontaneous object recognition (SOR), a finding supporting the assertion that distinct systems support these phenomena. This finding informs on the nature of these two fundamental forms of learning and may be taken as support for certain contemporary...
kids.frontiersin.org In our daily lives, we learn new things all the time. Unfortunately, it is usually difficult for us to remember everything that we learn. To increase our ability to remember, either for a few seconds or for many years, we can think in a way that ties together several pieces of information, so that they make fewer pieces of information. There are two ways the brain does this...
aflatoxin contamination of food and feedstuffs is a serious economic and health hazard. over a period of two years, 35 samples of raw pistachio nuts collected from different parts of iran were analysed for the presence of aflatoxigenic strains of the aspergillus flavus group. eighty-five isolates of a.flavus and a.parasiticuswere identified based on specific yello-orange pigment production in t...
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