Visual deprivation profoundly affects visual cortical response properties, but the activity-dependent plasticity mechanisms that underlie these changes are poorly understood. Monocular deprivation (MD) induces ocular dominance (OD) shifts through biphasic changes in cortical excitability, first decreasing responsiveness to the deprived eye, and then slowly increasing responsiveness to both the ...

Timing of nitrogen (N) fertilizer application can influence grass regrowth, so it is important to identify how tropical grasses respond delays in applying after defoliation. Our objective was the effects timing N harvest on productive, morphogenic and structural characteristics 3 grasses: ‘Xaraés’ (Urochloa brizantha [Hochst. ex A. Rich.] Stapf cv. Xaraés), ‘Marandu’ Marandu) ‘Tanzânia’ (Megath...

Temporal lobe epilepsy (TLE) is a common neurological disease and antiseizure medication is often inadequate for preventing apoptotic cell death. Aerobic swimming exercise (EX) augments neurogenesis in rats when initiated immediately in the postictal period. This study tests the hypothesis that aerobic exercise also augments neurogenesis over the long term. Male Wistar rats (age of 4 months) we...

To observe the evolution of network traffic correlations we analyze the eigenvalue spectra and eigenvectors statistics of delayed correlation matrices of network traffic counts time series. Delayed correlation matrix D (τ ) is composed of the correlations between one variable in the multivariable time series and another at a time delay τ . We determined, that inverse participation ratio (IPR) o...

Organisms occurring in environments subject to severe disturbance and ⁄ or periods of poor environmental quality that result in severe adult mortality can survive these periods by relying on alternate life stages that delay their development in a resistant state until conditions improve. In the northeast Pacific, the forest-forming giant kelp Macrocystis pyrifera (L.) C. Agardh periodically exp...

In hippocampal neurons, the firing of a train of action potentials is terminated by generation of the slow afterhyperpolarization (AHP). Recordings from hippocampal slices have shown that the slow AHP likely results from the activation of small-conductance calcium-activated potassium (SK) channels by calcium (Ca(2+)) entry through L-type Ca(2+) channels. However, the relative localization of th...

Hepatocyte growth factor (HGF) is a humoral mediator of epithelial-mesenchymal interactions, acting on a variety of epithelial cells as mitogen, motogen, and morphogen. Exogenous HGF acts as a hepatotrophic factor and a renotrophic factor during experimental injury. To investigate whether HGF has a pulmotrophic function, human recombinant HGF was administered to C57BL/6 mice with severe lung in...

BACKGROUND AND PURPOSE Hypothermia induced after perinatal hypoxia-ischemia is partially protective. This study examined whether early treatment with the noncompetitive N-methyl-d-aspartate receptor antagonist, dizocilpine, can augment neuroprotection with delayed hypothermia after severe asphyxia in preterm fetal sheep at 0.7 weeks gestation (equivalent to 28-32 weeks in humans). METHODS Fif...

Pulmonary arterial hypertension (PAH) causes pressure overload on the right ventricle and when untreated leads to progressive right ventricular dysfunction. Delayed contrast MRI can identify areas of myocardial infarction and myocardial fibrosis related to various cardiomyopathies. Delayed contrast magnetic resonance images in the short axis plane in 3 patients with PAH (Figure, A, idiopathic; ...

24 25 26 UN CO RR EC TE D PR Abstract. Selenium (Se) and arsenic are next-door neighbors on the periodic table and have similar chemical properties as metalloids. Arsenic antagonizes selenium toxicity in a number of organisms. Inorganic arsenic in drinking water is a human carcinogen while selenium compounds are anticarcinogenic in animals and humans. Our previous work showed that arsenite enha...