Multiple Currents
Mostrando 1-12 de 120 artigos, teses e dissertações.
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1. Análise das Propriedades Mecânicas de Juntas de Aço Carbono Estrutural Soldadas pelo Processo Arco Submerso com os Arcos Simples e Duplo (Tandem-Arc)
Resumo Diante de um cenário econômico onde a concorrência é cada vez mais acirrada, a busca por processos, técnicas e equipamentos de soldagem que proporcionem ganhos na produtividade é uma exigência para garantir a competitividade das empresas no mercado. Com o desenvolvimento e a adoção de novas tecnologias é possível inovar os processos convenc
Soldag. insp.. Publicado em: 13/06/2019
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2. LONELINESS AND CONTEMPORARY WORK: MULTIPLE PERSPECTIVES OF ANALYSIS
RESUMO Objetivo: Refletir as faces da solidão no contexto do trabalho contemporâneo contemplando-a: 1. como afeto da convivência e da interação social; 2. como sintoma do mal-estar no trabalho, resultado da ideologia gerencialista; e 3. como fonte para o desenvolvimento, o revigoramento e a formação do indivíduo. Originalidade/valor: O estudo torna
RAM, Rev. Adm. Mackenzie. Publicado em: 06/05/2019
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3. AMPEROMETRIC DETERMINATION OF 8-CHLOROTHEOPHYLLINE, CAFFEINE, AND DIPHENHYDRAMINE IN A SINGLE RUN
A simple method for simultaneous determination of 8-chlorotheophylline (CTP), caffeine (CAF), and diphenhydramine (DIP) using batch-injection analysis with multiple pulse amperometric detection (BIA-MPA) is reported. A sequence of three potential pulses (+1.10 V, +1.40 V, and +1.70 V) was applied to the boron-doped diamond working electrode with the acquisit
Quím. Nova. Publicado em: 2017-08
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4. The formulation of the policies of alimentary security in Peru 2001 to 2006: a case study of the department of Puno. / A formulação da política de segurança alimentar no Peru 2001-2006: um estudo de caso no departamento de Puno.
In Peru a fourth of childrens population younger than 5 years old present a chronic malnutrition and this indicator has remained almost the same since 1996. In Puno the problem is even larger because of social and political conditions. After the structural adjustment provoked by the changes of the economic system, half the Peruvian population, passed into th
Publicado em: 2010
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5. A study of the lightning characteristics in Brazil based on an analysis of the performance of the lightning location system / Estudo de relâmpagos no Brasil com base na análise de desempenho do sistema de localizacao de tempestades
The harmful lightning effects on the mankind have motivated several investigations on lightning characteristics in the world and, particularly, in Brazil. Many studies on the geographic, seasonal, topographic and demographic features of lightning have been done using lightning location systems (LLS). The LLS, which is located in the southeastern region of Br
Publicado em: 2000
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6. Estudo da modulação do canal de sodio pela ativação da proteina quinase
Sodium channels are responsible for the generation of cellular electrical activity involved in specific functions, such as cardiac cell contraction for heart beating, or electrical signal transmission performed by nerve cells for the whole body control. Sodium channels are modulated by many cell mechanisms, incIuding phosphorylation(phosphate ion bonding) of
Publicado em: 1994
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7. Light-induced currents in Xenopus oocytes expressing bovine rhodopsin.
1. We have investigated the functioning of bovine rod opsin, which is efficiently synthesized from RNA made by in vitro transcription, following injection into Xenopus oocytes. We found that oocytes expressing the gene for opsin exhibit light-dependent ionic currents only after pigment generation by incubation with 11-cis-retinal. These currents are similar
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8. On the multiple-conductance single channels activated by excitatory amino acids in large cerebellar neurones of the rat.
1. Single-channel currents evoked by excitatory amino acids have been examined in outside-out patches from large cerebellar neurones (including Purkinje cells) in tissue culture. L-Glutamate (3-10 microM), L-aspartate (3-10 microM), NMDA (N-methyl-D-aspartate, 10-50 microM), ibotenate (50 microM), quisqualate (3-50 microM), and kainate (3-50 microM) all prod
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9. Markov modelling of ensemble current relaxations: bovine adrenal nicotinic receptor currents analysed.
1. A general approach to the analysis of ensemble currents of ligand-gated channels is presented, with a variety of examples that include single and multiple agonist binding steps, desensitization and several blocking pathways. 2. The use of matrix methods to describe model reaction schemes leads to a simplification if the reaction scheme is irreversible: th
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10. Evidence for multiple open states of the Ca2+ channels in smooth muscle cells isolated from the guinea-pig detrusor.
1. Whole-cell voltage clamp techniques were used to examine the properties of voltage-dependent Ca2+ channel currents in single smooth muscle cells enzymatically dissociated from guinea-pig urinary bladder. Potassium currents were blocked with intracellular Cs+. A holding potential of -60 mV was normally applied. 2. When the membrane potential was returned t
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11. High-threshold Ca2+ currents in rat hippocampal interneurones and their selective inhibition by activation of GABA(B) receptors.
1. Whole-cell calcium currents were recorded from visually identified inhibitory interneurones located in stratum radiatum (near the border with stratum lacunosum-moleculare) of area. CA1 in rat hippocampal slices. Current-voltage (I-V) relationships in relatively well-clamped neurones showed that inward current activated between -50 and -40 mV (holding pote
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12. Spontaneous quantal currents in a central neuron match predictions from binomial analysis of evoked responses.
Inhibitory postsynaptic currents occurring spontaneously in the teleost Mauthner cell were analyzed with the single-electrode voltage-clamp technique. They were collected during depolarizing steps and were outward-going; this procedure allowed them to be isolated from possible excitatory currents flowing in the opposite direction. Their amplitude histograms