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IntroductioIl An intriguing feature of the adult brain is its capacity for structural and functional modification in response to external stimuli. This plasticity of the adult nervous system has been the focus of research efforts for decades. The historical antecedents of ideas about brain changes in relation to experiential factors can been traced back to(More)
This study analyzes the impact of environmental complexity in adult rats on their emotional behavior and c-Fos expression (a transcription factor protein implicated in neuronal plasticity) in various subdivisions of amygdala, as well as selected parts of the thalamus and hypothalamus. The animals were housed for 60 days in either enriched or impoverished(More)
We examined the effect of TiO2 nanoparticles (NPs) on the growth of maize and soybean plants and associated soil microbial communities. Plants were grown in a greenhouse, and low levels of undoped or nitrogen-doped TiO2 NPs were applied. Plant growth and nutrient content were determined, and effects of NPs on composition of soil microbial communities were(More)
The authors measured human T-cell lymphotrophic virus type I (HTLV-I) proviral load and intrathecal synthesis of antibodies to HTLV-I in CSF of 13 Brazilian patients with tropical spastic paraparesis/ HTLV-I-associated myelopathy (HAM). The authors also measured HTLV-I proviral load in peripheral blood mononuclear cells of five of these patients and found(More)
Satiety signals from the gastrointestinal tract travel via vagal afferents to the nucleus of the solitary tract (NTS) in the brain stem, the first central relay in a neural network which controls food intake. The non-competitive NMDA antagonist MK-801 facilitates food intake in rats by acting on the NTS. Here we report that hepatic portal vein infusion of(More)
Differences in tissue density cause a variety of scattering coefficients. To quantify optical coherence tomography (OCT) images for diagnosis, the tissue's scattering coefficient is estimated by curve fitting the OCT signals to a confocal single backscattering mode. The results from a group of 30 mice show that the scattering coefficients of bone, skin,(More)
The principal aim of this study is to investigate the scattering coefficient of colorectal polyp tissues using an optical coherence tomography (OCT) technique. It combines the existing scattering coefficient model and spectral domain OCT to achieve method of early diagnosis of colorectal polyp in hospitals. Seventeen patients were studied, and a total of(More)
Hydroponic cultures were conducted to investigate the effects of phosphorus (P), sulfur (S), and silicon (Si) on arsenic (As) accumulation and toxicity to wheat seedlings. The results showed that As concentrations in roots and shoots of wheat seedlings and arsenite [As(III)] in the nutrient solution were significantly decreased with increasing P(More)
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