Level Transmitters
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Detecção de interface em tanques de petróleo usando transmissores de nível e controladores Fuzzy
This work presents a proposal to detect interface in atmospheric oil tanks by installing a differential pressure level transmitter to infer the oil-water interface. The main goal of this project is to maximize the quantity of free water that is delivered to the drainage line by controlling the interface. A Fuzzy Controller has been implemented by using the i
Publicado em: 2009
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2. CARACTERIZAÇÃO DE ÁGUAS DE RESERVATÓRIOS SUPERFICIAIS PARA USO EM MICROIRRIGAÇÃO / CHARACTERIZATION OF SUPERFICIAL WATERS RESERVOIRS TO BE USED IN MICROIRRIGATION
Water is the most important and restrictive factor for the agricultural cultures so, the knowledge of its qualitative composition is important to the verticalization of productivity. For the microirrigation systems (located irrigation), its requirement in physical and chemical quality is bigger, because of the reduced diameter of its components, particularly
Publicado em: 2007
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3. Migração e movimentos do grumatã (Prochilodus lineatus, Valenciennes, 1836) (Characiformes, Prochilodontidae) no Rio dos Sinos, RS, Brasil, determinados por radiotelemetria
Life strategy, population structure and behavior are fundamental elements for the comprehension of fish biology and essential for conservation. The grumatã, (Prochilodus lineatus; Prochilodontidae) is a reophilic migratory species of economical importance for local fisheries. It is widely distributed in Brazil. During the last decades grumatã populations s
Publicado em: 2004
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4. Signal-Dependent Phosphorylation of the Membrane-Bound NarX Two-Component Sensor-Transmitter Protein of Escherichia coli: Nitrate Elicits a Superior Anion Ligand Response Compared to Nitrite
The Nar two-component regulatory system, consisting of the dual sensor-transmitters NarX and NarQ and the dual response regulators NarL and NarP, controls the expression of various anaerobic respiratory pathway genes and fermentation pathway genes. Although both NarX and NarQ are known to detect the two environmental signals nitrate and nitrite, little is kn
American Society for Microbiology.
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5. Depolarizing influences regulate preprotachykinin mRNA in sympathetic neurons.
We have been studying mechanisms regulating neurotransmitter plasticity in sympathetic neurons. Neurons of the rat superior cervical ganglion (SCG) synthesize multiple putative transmitters, including the peptide substance P (SP). We have now examined steady-state levels of the mRNA encoding preprotachykinin (PPT), the SP precursor. A cloned cDNA probe was u
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6. Primary afferent activity, putative excitatory transmitters and extracellular potassium levels in frog spinal cord.
1. Changes in extracellular K+ activity were measured with ion-selective microelectrodes in the grey matter of the isolated hemisected frog spinal cord. The magnitude of the elevation of [K+]o (delta[K+]o) produced by repetitive stimulation (25 Hz, 10 s) of afferent fibres in the sciatic nerve was monotonically related to the strength of the electrical stimu
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7. Evidence for a serotonin-mediated slow excitatory potential in the guinea-pig coeliac ganglia.
The nature of the putative transmitter(s) mediating the non-cholinergic excitatory post-synaptic potential (e.p.s.p.) described in the preceding paper was investigated by means of electrophysiological, pharmacological and immunohistochemical methods. Serotonin (1-10 microM) when applied by superfusion caused a slow depolarization that closely mimicked the sy
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8. Pavlovian Pattern Learning by Nonlinear Neural Networks
This note describes laws for the anatomy, potentials, spiking rules, and transmitters of some networks of formal neurons that enable them to learn spatial patterns by Pavlovian conditioning. Applications to spacetime pattern learning and operant conditioning are then possible, if the conditioning is viewed as multi-channel Pavlovian conditioning in a highly
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9. The roles of K+ conductance in expiratory pattern generation in anaesthetized cats.
1. The potassium current blockers caesium and tetraethylammonium were injected intracellularly by ionophoretic current into brainstem expiratory neurones of the ventral group. Neurones were identified by their spontaneous activity and by antidromic excitation from the spinal cord at the C2-C3 level. 2. The duration of action potentials increased and the earl
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10. Amino acid receptors of midget and parasol ganglion cells in primate retina.
Primate retinas contain two major ganglion cell types. Midget (or P type) cells have relatively sustained responses to light; the amplitude and polarity of these responses vary with stimulus wavelength. Parasol (or M type) cells are more sensitive to stimulus contrast and respond more transiently but are not selective for color. Both types can be further sub