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Artículos de revistas sobre el tema "Superfici Voltate"

Autor: Grafiati
Publicado: 10 de marzo de 2023
Última modificación: 31 de julio de 2025

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1

Castaño Serna, Juan Pablo, Ainhoa Rubio Clemente, and Edwin Chica Arrieta. "Evaluación de superficies reflectantes para paneles solares bifaciales mediante la metodología de superficie respuesta." Ingeniería 27, no. 3 (2022): e18069. http://dx.doi.org/10.14483/23448393.18069.

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Contexto: Los paneles solares fotovoltaicos bifaciales pueden generar más energía que los monofaciales, ya que, en el primer caso, ambos lados del panel quedan a disposición para captar la irradiancia solar y transformarla en energía eléctrica. La potencia adicional que se puede generar en los paneles bifaciales depende, entre otros factores, de la naturaleza y el tipo de la superficie reflectiva, así como de la orientación del módulo fotovoltaico. Método: En este trabajo se evalúan diversas superficies reflectantes para determinar la configuración óptima de un panel bifacial. Para este propós
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2

Koninckx, P. R., A. Ussia, B. Amro, et al. "Electrosurgery: heating, sparking and electrical arcs." Facts, Views and Vision in ObGyn 16, no. 3 (2024): 281–90. http://dx.doi.org/10.52054/fvvo.16.3.026.

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The translation of impedance (R), current (I), and voltage (V) into tissue effects and the understanding of the settings of electrosurgical units is not obvious if judged by the many questions during live surgery. Below 200 V, the current heats the tissue until the steam of boiling stops the current. Thus, slower heating, because of less energy or a larger contact area, results in deeper coagulation. Above 200 V and a duty cycle (per cent of time electricity is delivered) of >50% (yellow pedal), sparks become electric arcs, and the heat causes the explosion of superficial cells, i.e. cuttin
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3

Aydin, İbrahim, Ali İhsan Bahçepinar, and Canser Gül. "Caracterización de la superficie de un recubrimiento EPD sobre la aleación de Mg AZ91 obtenida mediante Pulvimetalurgia." Revista de Metalurgia 56, no. 3 (2020): 176. http://dx.doi.org/10.3989/revmetalm.176.

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Los implantes habituales en aplicaciones biomédicas como el Ti y sus aleaciones y el acero inoxidable 316L pueden dañar los tejidos circundantes, ocasionando infecciones. Para evitar este riesgo, es necesario producir materiales de implantes de nueva generación que sean más ligeros que los biomateriales existentes, en los que las propiedades mecánicas y estructura sean similares al hueso. En este estudio, el material de implante de aleación de Mg AZ91 se obtiene mediante un procedimiento pulvimetalúrgico. Adicionalmente, para mejorar la biocompatibilidad y bioactividad, el material de implante
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4

Naik, Subhashree, Sudhansu Ranjan Das, Debabrata Dhupal, and Ajit Kumar Khatua. "Análisis de la integridad de la superficie y evaluación de la sostenibilidad en el mecanizado por electroerosión de un material compuesto de matriz metálica ingenieril Al-22% SiC." Revista de Metalurgia 57, no. 4 (2021): e210. http://dx.doi.org/10.3989/revmetalm.210.

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En vista de las amplias aplicaciones que tienen los materiales compuestos ingenieriles de matriz metálica, particularmente en las industrias automotriz, eléctrica y aeroespacial, dar forma a estos materiales es un desafío realmente difícil. Esta investigación aborda el mecanizado por electroerosión de un material compuesto de matriz metálica Al-22% SiC para analizar la rugosidad de la superficie de las piezas mecanizadas. Se realizan una serie de pruebas de mecanizado en diversas condiciones de procesado (presión de chorro, voltaje, tiempo de activación del pulso, corriente de descarga, tiempo
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5

Guerra, Fernanda Lamego, Eduardo Grala da Cunha, Antônio César Silveira Baptista da Silva, and Stífany Knop. "Análise das condições favoráveis à formação de bolor em edificação histórica de Pelotas, RS, Brasil." Ambiente Construído 12, no. 4 (2012): 7–23. http://dx.doi.org/10.1590/s1678-86212012000400002.

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Considerando a relevância do desenvolvimento de estudos que visam a compreender as condições ambientais favoráveis à formação do bolor, este artigo apresenta uma análise do desempenho da superfície interior de uma parede voltada ao exterior em uma edificação histórica na cidade de Pelotas, RS. A superfície selecionada apresentava formação de bolor, confirmada por uma análise microbiológica. Com o objetivo de compreender as condições ambientais que favoreceram a formação do bolor na superfície naquele ambiente, foram aplicados dois métodos de análise das condições higrotérmicas da superfície: o
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6

Xing, Yong Ming, and Satoshi Kishimoto. "Fabrication of Superfine Electron Moiré Grid." Key Engineering Materials 326-328 (December 2006): 111–14. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.111.

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The electron moiré method uses a high frequency grating to measure microscopic deformation. Finer and finer gratings are being pursued to meet higher and higher resolution requirements in microscopic stress analysis. In this study, the techniques of fabricating electron grid by means of a scanning electron microscope are improved. The use of a low accelerating voltage shows a better effect than the high accelerating voltage in fabricating a superfine grid. A new group of parameters is suggested based on this consideration. A cross-line grid with a frequency of 10,000 lines/mm and a parallel gr
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7

Fan, S., M. Stewart, and R. K. Wong. "Differences in voltage-dependent sodium currents exhibited by superficial and deep layer neurons of guinea pig entorhinal cortex." Journal of Neurophysiology 71, no. 5 (1994): 1986–91. http://dx.doi.org/10.1152/jn.1994.71.5.1986.

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1. Sodium currents were studied using whole-cell voltage-clamp techniques in neurons acutely isolated from superficial (II/III) and deep (V/VI) layers of guinea pig entorhinal cortex. 2. Sodium currents were larger (peak amplitude) in superficial than in deep layer cells under the same conditions: -1939 +/- 780 (SD) pA (N = 6) versus -307 +/- 257 pA (N = 6). Specific membrane conductance was calculated to be 12.3 +/- 9.6 mS/cm2 for superficial layer cells and 1.4 +/- 0.9 mS/cm2 for deep layer cells. 3. Sodium currents could be activated in superficial layer cells from potentials as depolarized
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8

Du, Ai Min, Chu Chuan Chu, and Zhong Pan Zhu. "Development of Test Bench for Durability of Ignition Coil Based on Labview." Advanced Materials Research 1006-1007 (August 2014): 697–702. http://dx.doi.org/10.4028/www.scientific.net/amr.1006-1007.697.

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The primary current, the secondary voltage and superficial temperature of ignition coil witness characterization of work performance of the ignition coil. In this paper an ignition coil testing platform based on Labview is developed. The real-time performance parameters of the ignition coil are acquired by data acquisition card,high voltage probe, STM32 micro controller which include the primary current, the secondary voltage and superficial temperature of ignition coil. The results indicate that the testing bench significantly improves the collection of ignition coil performance parameters.
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9

Marques, Cristiane Michelle, Demóstenes Moreira, and Patrícia Neiva de Almeida. "Atuação fisioterapêutica no tratamento de úlceras plantares em portadores de hanseníase: uma revisão bibliográfica." Hansenologia Internationalis: hanseníase e outras doenças infecciosas 28, no. 2 (2003): 145–50. http://dx.doi.org/10.47878/hi.2003.v28.36393.

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As úlceras plantares são muito comuns na hanseníase e estão intimamente relacionadas ao nível de sensibilidade protetora na superfície plantar e fatores externos como pressões anormais durante a marcha. A presente revisão bibliográfica visa demonstrar as modalidades fisioterapêuticas que podem acelerar o processo de cicatrização dessas feridas, proporcionando ao paciente o retorno às suas atividades diárias. Foram encontrados muitos estudos onde os recursos fisioterapêuticos como a massagem manual superficial, radiação infravermelha e ultravioleta, terapia ultra-sônica, laserterapia de baixa i
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10

Pontes, K. C. S., A. P. B. Borges, T. S. Duarte, et al. "Membrana amniótica canina utilizada como bandagem em úlcera superficial de córnea de coelhos: aspectos clínicos." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 60, no. 5 (2008): 1069–74. http://dx.doi.org/10.1590/s0102-09352008000500005.

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Realizou-se a ceratectomia superficial em 28 coelhos, distribuídos em dois grupos. No grupo tratado, composto por 14 animais, utilizou-se a membrana amniótica canina como bandagem, suturada com sua face epitelial voltada contra a superfície corneana. O grupo controle não recebeu tratamento. A avaliação clínica foi realizada 24 horas após a cirurgia, a cada dois dias durante uma semana e a cada quatro dias até 180 dias. Avaliaram-se os efeitos da membrana amniótica como bandagem, comparando-se o tempo de epitelização da córnea entre os grupos e verificando o período necessário para que a córnea
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11

Uribe Martínez, Jorge Mario, Leidy Johana Quintero Rodríguez, Liliana Tirado-Mejía, and Francisco Javier Ibargüen. "ACONDICIONAMIENTO Y DIGITALIZACIÓN DE LA SEÑAL DE UN LVDT PARA LA MEDICIÓN DEL PERFIL DE UNA SUPERFICIE SÓLIDA Acondicionamiento y Digitalización de un LVDT." Revista de Investigaciones Universidad del Quindío 25, no. 1 (2014): 113–19. http://dx.doi.org/10.33975/riuq.vol25n1.160.

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El LVDT es el elemento más importante para la medición de los perfiles utilizando un perfilómetro de contacto y su función es convertir las variaciones de desplazamiento de una aguja en variaciones de voltaje, a través del desplazamiento del núcleo de una bobina acoplado a la aguja. El desplazamiento del núcleo a escala completa se determinó midiendo el recorrido total que hace la aguja, obteniendo el mismo voltaje en el secundario para los desplazamientos extremos. Con este valor y con el de los voltajes del primario y secundario se encontró una alta sensibilidad para el LVDT del perfilómetro
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12

Nixima, Ken'ichi, Kazuo Okanoya, Noritaka Ichinohe, and Tohru Kurotani. "Fast voltage-sensitive dye imaging of excitatory and inhibitory synaptic transmission in the rat granular retrosplenial cortex." Journal of Neurophysiology 118, no. 3 (2017): 1784–99. http://dx.doi.org/10.1152/jn.00734.2016.

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Rodent granular retrosplenial cortex (GRS) has dense connections between the anterior thalamic nuclei (ATN) and hippocampal formation. GRS superficial pyramidal neurons exhibit distinctive late spiking (LS) firing property and form patchy clusters with prominent apical dendritic bundles. The aim of this study was to investigate spatiotemporal dynamics of signal transduction in the GRS induced by ATN afferent stimulation by using fast voltage-sensitive dye imaging in rat brain slices. In coronal slices, layer 1a stimulation, which presumably activated thalamic fibers, evoked propagation of exci
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13

Gibor, Gilad, Daniel Yakubovich, Asher Peretz, and Bernard Attali. "External Barium Affects the Gating of KCNQ1 Potassium Channels and Produces a Pore Block via Two Discrete Sites." Journal of General Physiology 124, no. 1 (2004): 83–102. http://dx.doi.org/10.1085/jgp.200409068.

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The pore properties and the reciprocal interactions between permeant ions and the gating of KCNQ channels are poorly understood. Here we used external barium to investigate the permeation characteristics of homomeric KCNQ1 channels. We assessed the Ba2+ binding kinetics and the concentration and voltage dependence of Ba2+ steady-state block. Our results indicate that extracellular Ba2+ exerts a series of complex effects, including a voltage-dependent pore blockade as well as unique gating alterations. External barium interacts with the permeation pathway of KCNQ1 at two discrete and nonsequent
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14

Blankenship, M. L., D. E. Coyle, and M. L. Baccei. "Transcriptional expression of voltage-gated Na+ and voltage-independent K+ channels in the developing rat superficial dorsal horn." Neuroscience 231 (February 2013): 305–14. http://dx.doi.org/10.1016/j.neuroscience.2012.11.053.

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15

Chinnadurai, Thangam, and Subbiah Arungalai Vendan. "Predicción de la tasa de eliminación de material y rugosidad de la superficie de mecanizado por electroerosión de alambre de níquel utilizando la metodología de superficie de respuesta." Revista de Metalurgia 52, no. 4 (2016): 077. http://dx.doi.org/10.3989/revmetalm.077.

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Este estudio se centra en la investigación de los efectos de los parámetros del proceso, a saber, corriente máxima (Ip), duración del impulso (Ton), duración de desconexión del impulso (Toff), presión del agua (Wp), velocidad de alimentación del alambre (WF), tensión del alambre (Wt ), servo voltaje (Sv) y ajuste de avance del servo (SFS), velocidad de eliminación de material (MRR) y rugosidad de la superficie (SR), para la fabricación de alambre de níquel por descarga eléctrica (Wire-EDM) utilizando el método “Taguchi”. Se ha adoptado la metodología superficial de respuesta (RSM) con objeto d
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16

Izaguirre, V., and A. I. Zavaleta. "Canales de calcio voltajes dependientes." Ciencia e Investigación 1, no. 1 (1998): 49–61. http://dx.doi.org/10.15381/ci.v1i1.4979.

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La vía más importante para la entrada de Ca2+ en las células excitables (Células musculares, neuronas y células de glándulas neuroendocrinas) son los canales de Ca2+ voltajes dependientes. Al abrirse, permiten el flujo selectivo de iones Ca2+ a través del poro del canal, iniciándose una variedad de procesos intracelulares entre los que se incluyen la contracción muscular, la secreción de neurotransmisores, la expresión génica, la modulación de la excitabilidad de la membrana, el crecimiento de neuritas, etc. De esta forma, los canales de Ca2+ constituyen el enlace fundamental entre las señales
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17

Carreón Garcidueñas, Héctor Guillermo, Ariosto Medina Flores, Engelbert Huape Padilla, and Luis Béjar Gómez. "Efecto del aporte térmico en la resistencia a la corrosión de un recubrimiento de acero inoxidable martensítico depositado por soldadura." Superficies y Vacío 32 (December 10, 2019): 6–13. http://dx.doi.org/10.47566/2019_syv32_1-010006.

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En el proceso de colada continua, los rodillos se utilizan para la contención, soporte, conducción y transporte de la losa. Para extender substancialmente la vida útil de los rodillos, la superficie está cubierta con una capa resistente al desgaste llamada revestimiento duro el cual es aplicado por medio de soldadura de recargue, para mejorar las superficies que se encuentran sometidas a desgaste severo, oxidación o corrosión de los rodillos. El objetivo del presente trabajo es estudiar el efecto del aporte térmico por medio de técnicas electroquímicas de un acero inoxidable martensítico 414N
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18

WANG, JIA-JUNG, SHING-HONG LIU, CHING-IUAN CHERN, and JUI-HSAING HSIEH. "DEVELOPMENT OF AN ARTERIAL APPLANATION TONOMETER FOR DETECTING ARTERIAL BLOOD PRESSURE AND VOLUME." Biomedical Engineering: Applications, Basis and Communications 16, no. 06 (2004): 322–30. http://dx.doi.org/10.4015/s101623720400044x.

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Traditional arterial tonometry permits noninvasive and continuous recording of the arterial pressure waveform, by applanating a superficial artery supported by a bone. In the paper, we present an arterial tonometer to simultaneously register the blood pressure waveform and the arterial time-varying volume. The tonometer consisted mainly of a chamber filled with a conductive fluid, a flexible diphragm in touch with an artery, and a pressure sensor used to detect the underlying arterial pressure. In addition, four electrodes were in parallel diposed in the chamber, two of them were triggered wit
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19

Magistretti, Jacopo, and Marco de Curtis. "Low-Voltage Activated T-Type Calcium Currents Are Differently Expressed in Superficial and Deep Layers of Guinea PigPiriform Cortex." Journal of Neurophysiology 79, no. 2 (1998): 808–16. http://dx.doi.org/10.1152/jn.1998.79.2.808.

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Magistretti, Jacopo and Marco de Curtis. Low-voltage activated T-type calcium currents are differently expressed in superficial and deep layers of guinea pig piriform cortex. J. Neurophysiol. 79: 808–816, 1998. A variety of voltage-dependent calcium conductances are known to control neuronal excitability by boosting peripheral synaptic potentials and by shaping neuronal firing patterns. The existence and functional significance of a differential expression of low- and high-voltage activated (LVA and HVA, respectively) calcium currents in subpopulations of neurons, acutely isolated from differe
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20

Zhong, Li, and Xi Han. "Influence of Hydrogen on the Plasmas Nitriding Process of 35CrMo Steel." Advanced Materials Research 295-297 (July 2011): 1004–9. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1004.

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The mechanism of the formation of active nitrogen atoms and the function of hydrogen molecules for the dissociation of the mixture of nitrogen and hydrogen in the plasma nitriding process are discussed in this paper. The results show that the nitrided case thickness of nitrided samples become thinner and the surface hardness decreases with the increase of cathode voltage. Active nitrogen atoms mainly result from non-elastic collision between positive ions H2+ and neutral particles N2 for N2-H2 mixture plasma nitriding at 550V cathode voltage, the volume percent of e-Fe3N and the superficial ni
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21

Hu, Junhua, Jungang Yin, Hua Xu, et al. "Study on Abnormal Heat of Polymeric Insulators on Coastal Power Transmission Line." Journal of Physics: Conference Series 2522, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2522/1/012004.

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Abstract Heating at the high-voltage end has become one of the most frequent defects on polymeric insulators in service, particularly in humid and hot regions. Recent case surveys show that some highly overheated sample insulators survive almost all the standardized lab tests, which could not be fully explained by common related heating factors, including the fracture defects, superficial wet pollution, water absorption and moisture of polymeric housing, uneven sunlight, etc. In this paper, we try to find an alternative perspective to explain the temperature rise in the order of 10°C by studyi
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22

Kalinowski, Douglas P., Laura E. Edsberg, Robert A. Hewson, Robert H. Johnson, and Michael S. Brogan. "Low-Voltage Direct Current as a Fungicidal Agent for Treating Onychomycosis." Journal of the American Podiatric Medical Association 94, no. 6 (2004): 565–72. http://dx.doi.org/10.7547/0940565.

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Onychomycosis, most commonly caused by two species of dermatophyte fungi—Trichophyton rubrum and Trichophyton mentagrophytes—is primarily treated with regimens of topical and systemic antifungal medications. This study was undertaken to evaluate in vitro the efficacy of low-voltage direct current as an antifungal agent for treating onychomycosis. Agar plate cultures of T rubrum and T mentagrophytes were subjected to low-voltage direct current electrostimulation, and antifungal effects were observed as zones in the agar around the electrodes lacking fungal growth. Zones devoid of fungal growth
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23

Raileanu, Daniela. "Processing of microstructures of metal surfaces with chemical-thermal treatment in low voltage electrolytic plasma." Journal of Engineering Science 30, no. 1 (2023): 65–75. http://dx.doi.org/10.52326/jes.utm.2023.30(1).05.

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The main reason for these researches is to solve the problem of intensification of the alloying process by electric sparks by increasing the energy of the electric pulses. In relation to this, the purpose and object of the research is the need to assume a new concept of organizing the alloying process in order to intensify the strengthening of metal surfaces, excluding the negative effects. Among the electrophysical methods of layer formation, a special place is occupied by alloying by electric sparks of metal surfaces, considering the multitude of its characteristic advantages, which are the
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24

Work, J., J. H. Galla, B. B. Booker, J. A. Schafer, and R. G. Luke. "Effect of ADH on chloride reabsorption in the loop of Henle of the Brattleboro rat." American Journal of Physiology-Renal Physiology 249, no. 5 (1985): F698—F703. http://dx.doi.org/10.1152/ajprenal.1985.249.5.f698.

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Both in vivo superficial loop segment microperfusion and in vitro perfusion of isolated medullary thick ascending limb segments were used to assess the effect of vasopressin on loop of Henle chloride absorption in the Brattleboro rat. Superficial loop segments were perfused between the latest proximal and earliest distal tubule in vivo at 19.2 +/- 0.4 nl/min (mean +/- SE) with an artificial tubule fluid. Under control conditions, absolute chloride reabsorption was 1,596 +/- 61 pmol/min and increased to 1,876 +/- 102 after intravenous infusion of vasopressin (P less than 0.005). Distal tubule f
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Hyder, AHM Golam, Brian A. Morales, Malynda A. Cappelle, et al. "Evaluation of Electrodialysis Desalination Performance of Novel Bioinspired and Conventional Ion Exchange Membranes with Sodium Chloride Feed Solutions." Membranes 11, no. 3 (2021): 217. http://dx.doi.org/10.3390/membranes11030217.

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Electrodialysis (ED) desalination performance of different conventional and laboratory-scale ion exchange membranes (IEMs) has been evaluated by many researchers, but most of these studies used their own sets of experimental parameters such as feed solution compositions and concentrations, superficial velocities of the process streams (diluate, concentrate, and electrode rinse), applied electrical voltages, and types of IEMs. Thus, direct comparison of ED desalination performance of different IEMs is virtually impossible. While the use of different conventional IEMs in ED has been reported, th
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Li, Zhan Kai, Jing Qin Wang, Fu Min Zhang, et al. "Research of Electric Properties of Monocrystalline Silicon Solar Battery." Advanced Materials Research 427 (January 2012): 128–32. http://dx.doi.org/10.4028/www.scientific.net/amr.427.128.

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With crystalline silicon solar battery industry is developing rapidly, there are scientific significance and application value for guiding the industrial production using analysis of the electrical properties of crystalline silicon solar battery. This paper studies that the main parameters of monocrystalline crystal silicon solar battery: the junction depth and superficial concentrations influence on electrical characteristics of monocrystalline silicon solar battery. The result shows that for maximum efficiency, it is bound to get the largest possible open circuit voltage, short circuit curre
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Behjat, Vahid, Afshin Rezaei-Zare, Issouf Fofana, and Ali Naderian. "Concept Design of a High-Voltage Electrostatic Sanitizer to Prevent Spread of COVID-19 Coronavirus." Energies 14, no. 22 (2021): 7808. http://dx.doi.org/10.3390/en14227808.

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In addition to public health measures, including social distancing, masking, cleaning, surface disinfection, etc., ventilation and air filtration can be a key component of a multi-pronged risk mitigation strategy against COVID-19 transmission indoors. Electrostatic precipitators (ESP) have already proved their high performance in fluid filtration, particularly in industrial applications, to control exhaust gas emissions and remove fine and superfine particles from the flowing gas, using high-voltage electrostatic fields and forces. In this contribution, a high-voltage electrostatic sanitizer (
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Muñoz Aguirre, N., J. Eduardo Rivera-López, L. Martínez Pérez, and Pedro A. Tamayo Meza. "Synthesis and Atomic Force Microscopy Contact Current Images of Aluminum Doped ZnO Thin Films." Materials Science Forum 644 (March 2010): 109–12. http://dx.doi.org/10.4028/www.scientific.net/msf.644.109.

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Aluminum doped ZnO thin films were synthesized by the water-mist assisted spray pyrolysis technique. The structural characterization by means of X-Ray diffraction measurements is reported. By means of Atomic Force Microscopy, the superficial electrical characteristics of the thin films are studied. Specifically, contact current images are shown and discussed. It is important to emphasize that in spite of no voltage is applied to the Atomic Force Microscopy contact conductive tip, current images are getting.
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Costa, Vladimir Santos da, and Afonso De Moraes Paiva. "THE IMPACT OF SURFACE HEAT FLUXES ON THE SIMULATION OF THE BRAZIL CURRENT." Revista Brasileira de Geofísica 31, no. 2 (2013): 307. http://dx.doi.org/10.22564/rbgf.v31i2.296.

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ABSTRACT. The impact of different formulations of surface heat fluxes (no fluxes, climatological fluxes, restoring of SST towards climatology, climatological fluxes plus SST restoring, and model-computed fluxes via bulk formulas) on the modeling of the Brazil Current is investigated in numerical simulations performed with the Regional Ocean Model (ROMS). While mechanical forcing may be dominant, it is shown that correct upper ocean currents and thermal structure can only be obtained when heat fluxes are implemented, even in regions of strong horizontal advection, and that some form of feedback
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Carvalho, Nathalia Alborghetti, and Evelise Ruthschilling. "Inovação em metodologia de projeto aplicada ao design de superfície voltado para moda." ModaPalavra 9, no. 17 (2016): 179–94. http://dx.doi.org/10.5965/1982615x09172016179.

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Furutani, Kenta, Miho Ikoma, Hideaki Ishii, Hiroshi Baba, and Tatsuro Kohno. "Bupivacaine Inhibits Glutamatergic Transmission in Spinal Dorsal Horn Neurons." Anesthesiology 112, no. 1 (2010): 138–43. http://dx.doi.org/10.1097/01.anes.0000365964.97138.9a.

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Background The local anesthetic bupivacaine is thought not only to block sodium channels but also to interact with various receptors. Here, the authors focus on excitatory glutamatergic transmission in the superficial dorsal horn of the spinal cord with respect to its importance for nociceptive processing. Methods The effects of bupivacaine on the response to exogenous administration of N-methyl-D-aspartate (NMDA) receptor agonists were examined in lamina II neurons of adult rat spinal cord slices using the whole-cell patch-clamp technique. Results Bupivacaine (0.5, 2 mm) dose-dependently redu
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32

Schnoebel, Rose, Matthias Wolff, Saskia C. Peters, et al. "Ketamine impairs excitability in superficial dorsal horn neurones by blocking sodium and voltage-gated potassium currents." British Journal of Pharmacology 146, no. 6 (2005): 826–33. http://dx.doi.org/10.1038/sj.bjp.0706385.

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Cherny, Vladimir V., and Thomas E. DeCoursey. "Ph-Dependent Inhibition of Voltage-Gated H+ Currents in Rat Alveolar Epithelial Cells by Zn2+ and Other Divalent Cations." Journal of General Physiology 114, no. 6 (1999): 819–38. http://dx.doi.org/10.1085/jgp.114.6.819.

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Inhibition by polyvalent cations is a defining characteristic of voltage-gated proton channels. The mechanism of this inhibition was studied in rat alveolar epithelial cells using tight-seal voltage clamp techniques. Metal concentrations were corrected for measured binding to buffers. Externally applied ZnCl2 reduced the H+ current, shifted the voltage-activation curve toward positive potentials, and slowed the turn-on of H+ current upon depolarization more than could be accounted for by a simple voltage shift, with minimal effects on the closing rate. The effects of Zn2+ were inconsistent wit
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34

Li, Hao Hua, You Hua Wang, and Dun Yu Zhu. "Research of a New Type of Solar Cell Materials." Applied Mechanics and Materials 488-489 (January 2014): 44–47. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.44.

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Solar energy is the inexhaustible,enewable Energy. The solar cell is the solar light energy into electricity. The unique advantages of solar cell. Potential, more than wind, hydro, geothermal energy, nuclear energy and other resources, is expected to become the main pillar of power supply in the future. This paper studies that the main parameters of monocrystalline crystal silicon solar battery: the junction depth and superficial concentrations influence on electrical characteristics of monocrystalline silicon solar battery. The result shows that for maximum efficiency, it is bound to get the
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35

Espinosa-Arbeláez, D.G., J.J. Prías-Barragán, Botero Germán Andrés Álvarez, and H. Ariza-Calderón. "Análisis de Espectros de Fotorreflectancia en Al0.5Ga0.5As:Sn desde 12K Hasta Temperatura Ambiente." Revista Colombiana de Física 36, no. 2 (2004): 366–70. https://doi.org/10.5281/zenodo.10981069.

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En este trabajo se presentan espectros de Al0.5Ga0.5As:Sn con una concentración 1x1016 cm-3 obtenidos por medio de la técnica de fotorreflectancia (FR) a temperaturas en el rango de 12K a 300K. La muestra fue crecida por epitaxia en fase líquida sobre un substrato de GaAs. Los espectros fueron analizados con una combinación de dos funciones, una asociada a la transición excitónica y la otra a oscilaciones Franz Keldysh. La dependencia de las transiciones electrónicas con la temperatura concuerda con el modelo de Varshni. A partir de los an&aacut
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36

Nascimento, Walnice Maria Oliveira, Maria Socorro Padilha Oliveira, José Edmar Urano Carvalho, and Carlos Hans Müller. "Influência da posição de semeadura na germinação, vigor e crescimento de plântulas de bacabinha (Oenocarpus mapora Karsten - Aecaceae)." Revista Brasileira de Sementes 24, no. 1 (2002): 179–82. http://dx.doi.org/10.1590/s0101-31222002000100026.

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A bacabinha (Oenocarpus mapora Karsten) é uma espécie de palmeira que cresce em touceiras de cinco a 12 indivíduos, nativa da Amazônia, podendo ainda ser encontrada em alguns países do norte da América do Sul e da América Central. Seu fruto é utilizado para fabricar refresco, sorvetes e cremes. Extraindo também, de seu estipe palmito, com excelentes características organolépticas e bom rendimento, devido a suas potencialidades essa espécie vem sendo estudada no sentido de domesticá-la. Com o objetivo de verificar o efeito da posição de semeadura na germinação, no vigor e no crescimento das plâ
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37

Virca, Ioan. "Statistical Analysis of Results Obtained in the Hardening Surface of the Metal Powder Materials with Optical Radiation Impulses." Scientific Bulletin 20, no. 2 (2015): 79–85. http://dx.doi.org/10.1515/bsaft-2015-0012.

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Abstract The paper presents how is processed the data resulted from application of pulsed optical superficial treatments on surfaces of materials made of metal powders. The parameters of the electrotechnological regime work are variable in the experimental program, namely the distance between the axis focal energy sources and surfaces play, the number of energy pulses applied to the voltage pulse of optical radiation, which causes a statistical analysis more complex, after which it will precise drawing lessons that will lead to a calculation microhardness model in the superificial layer of mat
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38

Hao, Ming Feng, Yong Liu, Xue Tao He, Yu Mei Ding, and Wei Min Yang. "Factors Influencing Diameter of Polypropylene Fiber in Melt Electrospinning." Advanced Materials Research 221 (March 2011): 129–34. http://dx.doi.org/10.4028/www.scientific.net/amr.221.129.

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Melt electrospinning is a safer, more environmentally friendly and cheaper alternative to solution electrospinning in producing superfine fibers. In this paper, a novel melt electrospinning device was used, which has higher efficiency than conventional equipment. Polypropylene is widely used in many fields and it is difficult to find a suitable solvent for its solution electrospinning at room temperature, so it was chosen in this study. The influences of the electrospinning parameters such as temperature and voltage on the diameter of the spinning fibers have been studied. Temperatures higher
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39

Chen, Wen Jie, Bin Jie Xin, and Xiang Ji Wu. "Study on the Preparation of PSA NanoFibers Using Electro-Spinning Technology and its Characterizations." Key Engineering Materials 531-532 (December 2012): 527–30. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.527.

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Polysulfonamide (PSA) superfine fibers were prepared by the self-developed device using the electrospinning technology. The micro surface morphology of the manufactured PSA fibers was characterized by the Scanning Electron Microscope (SEM). It was found that the diameter of PSA fibers and its variance can be influenced by the electrospinning parameters. The experimental results indicate that the morphology of PSA fibers ranged from irregular (beaded) to uniform structure with an increase of solution concentration; the thickness and its variance of the PSA fibers were decreased with the increas
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40

Nomura, Y., M. Asano, K. Ito, Y. Uyama, Y. Imaizumi, and M. Watanabe. "Superficial sarcoplasmic reticulum calcium buffering of resting, voltage-dependent Ca++ influx in rat femoral arterial smooth muscle." Journal of Pharmacology and Experimental Therapeutics 279, no. 2 (1996): 830–37. https://doi.org/10.1016/s0022-3565(25)21195-8.

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41

Meza-Jiménez, María de Lourdes, Minerva Aurora Hernández-Gallegos, María Reyna Robles-López, Humberto Hernández-Sánchez, and Raúl René Robles-de la Torre. "Efecto del campo eléctrico de alto voltaje sobre la actividad residual de la papaina." Mexican Journal of Biotechnology 1, no. 1 (2016): 107–12. https://doi.org/10.29267/mxjb.2016.1.1.107-112.

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Las tecnologías no térmicas son una alternativa para evitar o disminuir el uso de calor o energía térmica en la conservación de alimentos. Algunos ejemplos son Campo Eléctrico de Alto Voltaje (CEAV), Campo Eléctrico Pulsado, y Ultrasonido, entre otras. En este proyecto se aplicó CEAV a la papaína para determinar su efecto sobre la Actividad Residual (AR). Lo cual se realizó con un Diseño Central Compuesto (DCC), posteriormente se determinó la AR por el método de Kunitz. Los factores de estudio fueron Campo Eléctrico (CE) (2.15, 5.0 y 7.85 kV/cm) y tiempo (1, 15.5 y 30 minutos). Los resultados
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42

Dulce-Moreno, Hector Jaime, Valeri Dougar-Jabon, and Piotr Andrei-Tsygankov. "Implantación iónica." Respuestas 8, no. 1 (2016): 19–30. http://dx.doi.org/10.22463/0122820x.707.

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En este trabajo se presenta una revisión de las diferentes técnicas de implantación de iones desde los implantadores por haces iónicos, utilizados en la fabricación de semiconductores, pasando por una serie de desarrollos con base en la tecnología de la física del plasma, hasta llegar a la técnica denominada Implantación Iónica Tridimensional (3DII). Para cada una de las técnicas de implantación iónica se presentan los dispositivos más comunes y se analizan sus características principales. Para el caso de la Implantación Iónica Tridimensional se describe el equipo JUPITER (Joint Universal Plas
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43

Sanchez, J. A., J. A. Dani, D. Siemen, and B. Hille. "Slow permeation of organic cations in acetylcholine receptor channels." Journal of General Physiology 87, no. 6 (1986): 985–1001. http://dx.doi.org/10.1085/jgp.87.6.985.

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Block, permeation, and agonist action of small organic amine compounds were studied in acetylcholine receptor (AChR) channels. Single channel conductances were calculated from fluctuation analysis at the frog neuromuscular junction and measured by patch clamp of cultured rat myotubes. The conductance was depressed by a few millimolar external dimethylammonium, arginine, dimethyldiethanolammonium, and Tris. Except with dimethylammonium, the block was intensified with hyperpolarization. A two-barrier Eyring model describes the slowed permeation and voltage dependence well for the three less perm
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44

Stępińska, Izabela, Elżbieta Czerwosz, Mirosław Kozłowski, Halina Wronka, and Piotr Dłużewski. "Studies of field emission process influence on changes in CNT films with different CNT superficial density." Materials Science-Poland 36, no. 1 (2018): 27–33. http://dx.doi.org/10.1515/msp-2018-0001.

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Abstract Field emission from materials at high electric fields can be associated with unfavorable or even destructive effect on the surface of the investigated cathode. The impact of high voltage electric power supply causes locally very strong electric fields focusing on the cathode surface. It causes a number of phenomena, which can adversely affect the morphology and the structure of the cathode material. Such a phenomenon is, for example, peeling of an emissive layer from the substrate or its burnout. It results in tearing of the layer and a decrease or loss of its ability to electrons emi
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45

Edelstein, Jerome, Walter Peters, and Robert Cartotto. "Lightning Injury: A Review and Case Presentations." Canadian Journal of Plastic Surgery 2, no. 4 (1994): 164–68. http://dx.doi.org/10.1177/229255039400200407.

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J Edelstein, W Peters, R Cartotto. Lightning injury: A review and case presentations. Can J Plast Surg 1994;2(4):164-168. Lightning injuries are relatively uncommon, although thousands are affected each year. Many patients are left with permanent sequelae. This type of injury is very different from other high voltage electrical injuries. Lightning burns are usually superficial and only about one quarter of those struck by lightning will actually die. The number of deaths can be reduced if proper early resuscitative methods are used. Two lightning-strike victims are presented. The first patient
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46

Hernández-Almudi, P., D. Suárez, E. Montijano, and J. Merino. "Control inteligente mediante escalado dinámico voltaje-frecuencia (DVFS) de la temperatura en procesadores embebidos." Revista Iberoamericana de Automática e Informática industrial 18, no. 4 (2021): 396. http://dx.doi.org/10.4995/riai.2021.14200.

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<p>El aumento de la capacidad de cálculo de los procesadores embebidos ha generado una revolución en numerosos dominios de aplicación como la computación móvil o la robótica. La disipación del consumo producido por estos cálculos en una superficie tan pequeña hace que la disipación de energía suponga un problema de primer orden. Por un lado, no es posible aplicar técnicas de disipación activas y, por otro, las exigencias de diseño impiden una correcta disipación pasiva. Para resolver este problema, este trabajo presenta una metodología de control para el mantenimiento de una temperatura
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47

Glasgow, Stephen D., and C. Andrew Chapman. "Local Generation of Theta-Frequency EEG Activity in the Parasubiculum." Journal of Neurophysiology 97, no. 6 (2007): 3868–79. http://dx.doi.org/10.1152/jn.01306.2006.

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The parasubiculum is a major component of the hippocampal formation that receives inputs from the CA1 region, anterior thalamus, and medial septum and that projects primarily to layer II of the entorhinal cortex. Hippocampal theta-frequency (4–12 Hz) electroencephalographic (EEG) activity has been correlated with sensorimotor integration, spatial navigation, and memory functions. The present study was aimed at determining if theta is also generated locally within the parasubiculum versus volume conducted from adjacent structures. In urethan-anesthetized rats, the phase-reversal of theta activi
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48

Méndez Berlanga, Julio Antonio. "Tratamiento electro-hidropónico de maíz y su influencia en la cinemática de crecimiento." Revista Agraria 1, no. 2 (1985): 221–47. http://dx.doi.org/10.59741/agraria.v1i2.358.

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 resumen en español
 
 Se describe y justifica el funcionamiento y la aplicación práctica de una nueva técnica de tratamiento electro-hidropónico, como un medio de selección y control de la cinemática de crecimiento, evaluada en maiz, por medio de un análisis físico y estadístico. Esta técnica tiene importancia para fines de investigación y en la producción agrícola a nivel invernadero y campo.
 El sistema hidropónico tipo solución, se constituyó de tal manera, que formase un condensador electrolítico de placas planas paralelas, una superior en la superficie de la solución
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49

Figueroa Godoy, Fernando, Jacinto Torres Jimenez, Rubén Jaramillo Vacio, Javier Yáñez Mendiola, and José Ángel Colin. "Analysis of Insulating Material of XLPE Cables considering Innovative Patterns of Partial Discharges." Mathematical Problems in Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/2379418.

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This paper aims to analyze the quality of insulation in high voltage underground cables XLPE using a prototype which classifies the following usual types of patterns of partial discharge (PD): (1) internal PD, (2) superficial PD, (3) corona discharge in air, and (4) corona discharge in oil, in addition to considering two new PD patterns: (1) false contact and (2) floating ground. The tests and measurements to obtain the patterns and study cases of partial discharges were performed at the Testing Laboratory Equipment and Materials (LEPEM) of the Federal Electricity Commission of Mexico (CFE) us
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50

Yang, Lie, Larry S. Benardo, Helen Valsamis, and Douglas S. F. Ling. "Acute Injury to Superficial Cortex Leads to a Decrease in Synaptic Inhibition and Increase in Excitation in Neocortical Layer V Pyramidal Cells." Journal of Neurophysiology 97, no. 1 (2007): 178–87. http://dx.doi.org/10.1152/jn.01374.2005.

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Injury to the superficial layers of cerebral cortex produces alterations in the synaptic responses of local circuits that promote the development of seizures. To further delineate the specific changes in synaptic strength that are induced by this type of cortical injury, whole cell voltage-clamp recordings were used to examine evoked and spontaneous synaptic events from layer V pyramidal cells in coronal slices prepared from surgically traumatized rat neocortices in which the superficial third of the cortex (layers I, II, and part of III) was removed. Slices from intact neocortices were used a
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