Histograms 4d
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Detecção de movimentos não usuais no espaço_fase / Detection of unusual motion in space-phase
This work aims to present a model for detection of unusual motion based on trajectories. This model relates to the research field on intelligent cameras and surveillance systems, that tends to compete nowadays with the enormous range of devices based in hardware available on the market. The main idea of the proposed approach is to analyze trajectories acquir
Publicado em: 2008
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2. Taxonomia e Paleoecologia de Ostracodes de Aptiano, Bacia do Cedro, Estado de Pernambuco, Ne-Brasil: ImplicaÃÃes Paleoambientais BioestratigrÃficas
In the Cedro basin, during the Alagoas Stage, the deposition of sediments occurs during the Pos-rift stage, correspondent to the Crato Formation. The sampling carries through in these sediments allowed to the identification of five genus and 18 lÃmnicos species of ostracodas: Harbinia angulata (KrÃmmelbein &Weber, 1971), Harbinia micropapillosa (Bate, 1972
Publicado em: 2007
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3. Assessment of the reliability or amplitude histograms from excitatory synapses in rat hippocampal CA1 in vitro.
1. Excitatory postsynaptic potentials (EPSPs) were evoked using minimal extracellular stimulation and recorded from pyramidal cells from the CA1 region of slices taken from adult rats and maintained in vitro. 2. Segments of data were selected that gave EPSP amplitude frequency histograms that showed approximately equally spaced peaks. Selection was performed
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4. Regulation of capillary blood flow and oxygen supply in skeletal muscle in dogs during hypoxaemia.
1. Multiwire surface electrodes were used to measure local hydrogen clearance curves and tissue PO2 in vivo. Evaluation of the initial slopes of the hydrogen clearance curves enabled the measurement of capillary blood flow and its distribution. 2. Capillary blood flow and tissue PO2 frequency distribution histograms were measured in the m. sartorius of anaes
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5. Local oxygen supply and blood flow regulation in contracting muscle in dogs and rabbits.
1. Multiwire surface electrodes were used to measure local hydrogen clearance curves and tissues PO2 in the sartorius muscle in dogs under resting conditions and during stimulation of the muscle at 1, 2, 4, 8 and 20 Hz via the femoral nerve. Tissue oxygen supply was assessed by means of PO2 histograms; evaluation of the initial slopes of the hydrogen clearan
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6. Escherichia coli DNA distributions measured by flow cytometry and compared with theoretical computer simulations.
A computer simulation routine has been made to calculate the DNA distributions of exponentially growing cultures of Escherichia coli. Calculations were based on a previously published model (S. Cooper and C.E. Helmstetter, J. Mol. Biol. 31:519-540, 1968). Simulated distributions were compared with experimental DNA distributions (histograms) recorded by flow
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7. The quantal size at retinogeniculate synapses determined from spontaneous and evoked EPSCs in guinea-pig thalamic slices.
1. To determine the quantal size at retinogeniculate synapses, spontaneous and evoked excitatory postsynaptic currents (EPSCs) were recorded in twelve neurones of the dorsal lateral geniculate nucleus in guinea-pig thalamic slices using the whole-cell patch-clamp technique. We limited our study to the fast non-N-methyl-D-aspartate (NMDA) component of the EPS
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8. Desynchronization of epileptiform activity by extracellular current pulses in rat hippocampal slices.
1. A single cathodic current pulse applied in the somatic CA1 region of the hippocampus was found to induce a large decrease in the amplitude of the population spike. 2. Intracellular recordings showed intense cellular firing suggesting the amplitude decrease could not be attributed to a decrease in neuronal firing. 3. Simultaneous intracellular and extracel
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9. Kinetic properties of the GABAA receptor main conductance state of mouse spinal cord neurones in culture.
1. The kinetic properties of the main conductance state of gamma-aminobutyric acidA (GABA) receptor channels from somata of mouse spinal cord neurones in cell culture were investigated using patch clamp techniques. 2. Whole-cell GABA receptor currents increased in a concentration-dependent manner from 0.5 to 5 microM. 3. Single-channel currents were recorded
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10. Burst kinetics of single NMDA receptor currents in cell-attached patches from rat brain cortical neurons in culture.
1. The patch-clamp technique was used to record single-channel currents from cell-attached patches on rat brain cortical neurons in culture. The composition of the open and shut intervals during bursts of openings was studied in N-methyl-D-aspartate (NMDA) receptors exposed to 1 microM NMDA and 10 microM glycine at a membrane potential of -70 mV. 2. Open int
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11. The inhibition of single N-methyl-D-aspartate-activated channels by zinc ions on cultured rat neurones.
1. Single channels activated by N-methyl-D-aspartate (NMDA) were studied in outside-out patches of cultured hippocampal neurones in the presence of glycine and absence of magnesium. The effects of the transition metal ions zinc and cadmium on NMDA channels were tested by placing the membrane patch at the mouth of one of an array of large barrelled flow pipes
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12. On the action of ruthenium red and neuraminidase at the frog neuromuscular junction.
1. The actions of the polyvalent cationic dye Ruthenium Red and the enzyme neuraminidase were studied at the frog neuromuscular junction. 2. Both Ruthenium Red (0.5-40 microM) and neuraminidase (1, 2 and 4 u.) reduced the miniature end-plate potential (m.e.p.p.) amplitude irreversibly with little change in frequency. This effect could be attributed to the de