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	Provedor de dados BJMBR (2) Autor Brasil,R.O. (2) Leal-Cardoso,J.H. (2) Albuquerque,A.A.C. (1) Coelho-de-Souza,A.N. (1) Lopes-Junior,J.E.G. (1) Matos-Brito,B.G. (1) Sampaio-Freitas,A.B. (1) Viana-Cardoso,K.V. (1) Mais... Palavra-chave Compound action potential (1) Electrical isolation (1) Electrical stimulation (1) Essential oil (1) Estragole (1) Nerve conduction velocity (1) Pulse stimulation (1) Sciatic nerve (1) Stimulus isolator (1) Mais... Tipo do documento Info:eu-repo/semantics/other (2) Ano 2004 (1) 1999 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última An optically coupled power stimulus isolation unit with high voltage and fast rise time output BJMBR Brasil,R.O.; Leal-Cardoso,J.H.. Recent technological developments have created new devices that could improve and simplify the construction of stimulus isolators. HEXFET transistors can switch large currents and hundreds of volts in nanoseconds. The newer opto-isolators can give a pulse rise time of a few nanoseconds, with output compatible with MOSFET devices, in which delays are reduced to nanoseconds. Integrated DC/DC converters are now available. Using these new resources we developed a new electrical stimulus isolator circuit with selectable constant-current and constant-voltage modes, which are precise and easy to construct. The circuit works like a regulated power supply in both modes with output switched to zero or to free mode through an opto-isolator device. The isolator... Tipo: Info:eu-repo/semantics/other Palavras-chave: Electrical isolation; Electrical stimulation; Pulse stimulation; Stimulus isolator. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000600013 Effects of estragole on the compound action potential of the rat sciatic nerve BJMBR Leal-Cardoso,J.H.; Matos-Brito,B.G.; Lopes-Junior,J.E.G.; Viana-Cardoso,K.V.; Sampaio-Freitas,A.B.; Brasil,R.O.; Coelho-de-Souza,A.N.; Albuquerque,A.A.C.. Estragole, a relatively nontoxic terpenoid ether, is an important constituent of many essential oils with widespread applications in folk medicine and aromatherapy and known to have potent local anesthetic activity. We investigated the effects of estragole on the compound action potential (CAP) of the rat sciatic nerve. The experiments were carried out on sciatic nerves dissected from Wistar rats. Nerves, mounted in a moist chamber, were stimulated at a frequency of 0.2 Hz, with electric pulses of 50-100-µs duration at 10-20 V, and evoked CAP were monitored on an oscilloscope and recorded on a computer. CAP control parameters were: peak-to-peak amplitude (PPA), 9.9 ± 0.55 mV (N = 15), conduction velocity, 92.2 ± 4.36 m/s (N = 15), chronaxy, 45.6 ± 3.74 µs... Tipo: Info:eu-repo/semantics/other Palavras-chave: Estragole; Essential oil; Sciatic nerve; Compound action potential; Nerve conduction velocity. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000800009 Registros recuperados: 2 Primeira ... 1 ... Última

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