Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 6
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Baroreflex function in conscious rats submitted to iron overload BJMBR
Cardoso,L.M.; Pedrosa,M.L.; Silva,M.E.; Moraes,M.F.D.; Colombari,E.; Chianca-Jr.,D.A..
Our hypothesis is that iron accumulated in tissue, rather than in serum, may compromise cardiovascular control. Male Fischer 344 rats weighing 180 to 220 g were divided into 2 groups. In the serum iron overload group (SIO, N = 12), 20 mg elemental iron was injected ip daily for 7 days. In the tissue iron overload group (TIO, N = 19), a smaller amount of elemental iron was injected (10 mg, daily) for 5 days followed by a resting period of 7 days. Reflex heart rate responses were elicited by iv injections of either phenylephrine (0.5 to 5.0 µg/kg) or sodium nitroprusside (1.0 to 10.0 µg/kg). Baroreflex curves were determined and fitted to sigmoidal equations and the baroreflex gain coefficient was evaluated. To evaluate the role of other than a direct effect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Baroreflex; Iron overload; Heart rate; Blood pressure; Iron dextran; Deferoxamine.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000200008
Imagem não selecionada

Imprime registro no formato completo
Computerized invasive measurement of time-dependent intraocular pressure BJMBR
Campos,T.V.O.; Jacobovitz,S.; Almeida,H.G.; Massensini,A.R.; Moraes,M.F.D..
Several methods have been described to measure intraocular pressure (IOP) in clinical and research situations. However, the measurement of time varying IOP with high accuracy, mainly in situations that alter corneal properties, has not been reported until now. The present report describes a computerized system capable of recording the transitory variability of IOP, which is sufficiently sensitive to reliably measure ocular pulse peak-to-peak values. We also describe its characteristics and discuss its applicability to research and clinical studies. The device consists of a pressure transducer, a signal conditioning unit and an analog-to-digital converter coupled to a video acquisition board. A modified Cairns trabeculectomy was performed in 9 Oryctolagus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glaucoma; Intraocular pressure measurement; Trabeculectomy; Signal processing; Computer-assisted measurement.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900013
Imagem não selecionada

Imprime registro no formato completo
Glass pipette-carbon fiber microelectrodes for evoked potential recordings BJMBR
Moraes,M.F.D.; Garcia-Cairasco,N..
Current methods for recording field potentials with tungsten electrodes make it virtually impossible to use the same recording electrode also as a lesioning electrode, for example for histological confirmation of the recorded site, because the lesioning procedure usually wears off the tungsten tip. Therefore, the electrode would have to be replaced after each lesioning procedure, which is a very high cost solution to the problem. We present here a low cost, easy to make, high quality glass pipette-carbon fiber microelectrode that shows resistive, signal/noise and electrochemical coupling advantages over tungsten electrodes. Also, currently used carbon fiber microelectrodes often show problems with electrical continuity, especially regarding electrochemical...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Evoked potentials; Glass pipette-carbon fiber; Microelectrodes; Voltammetry.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001100010
Imagem não selecionada

Imprime registro no formato completo
Low-cost automatic activity data recording system BJMBR
Moraes,M.F.D.; Ferrarezi,C.; Mont'Alverne,F.J.A.; Garcia-Cairasco,N..
We describe a low-cost, high quality device capable of monitoring indirect activity by detecting touch-release events on a conducting surface, i.e., the animal's cage cover. In addition to the detecting sensor itself, the system includes an IBM PC interface for prompt data storage. The hardware/software design, while serving for other purposes, is used to record the circadian activity rhythm pattern of rats with time in an automated computerized fashion using minimal cost computer equipment (IBM PC XT). Once the sensor detects a touch-release action of the rat in the upper portion of the cage, the interface sends a command to the PC which records the time (hours-minutes-seconds) when the activity occurred. As a result, the computer builds up several files...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Circadian rhythm; Automated acquisition; Actograms; FFT; Cosinor; Chronobiology.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000800015
Imagem não selecionada

Imprime registro no formato completo
Reduced hippocampal GABAergic function in Wistar audiogenic rats BJMBR
Drumond,L.E.; Kushmerick,C.; Guidine,P.A.M.; Doretto,M.C.; Moraes,M.F.D.; Massensini,A.R..
Epilepsy is a neurological disorder associated with excitatory and inhibitory imbalance within the underlying neural network. This study evaluated inhibitory γ-amino-butyric acid (GABA)ergic modulation in the CA1 region of the hippocampus of male Wistar rats and Wistar audiogenic rats (aged 90 ± 3 days), a strain of inbred animals susceptible to audiogenic seizures. Field excitatory postsynaptic potentials and population spike complexes in response to Schaffer collateral fiber stimulation were recorded in hippocampal slices before and during application of picrotoxin (50 µM, 60 min), a GABA A antagonist, and the size of the population spike was quantified by measuring its amplitude and slope. In control audiogenic-resistant Wistar rats (N = 9), picrotoxin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epilepsy; Extracellular recording; GABA; Hippocampus; Wistar audiogenic rats; Picrotoxin.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001000011
Imagem não selecionada

Imprime registro no formato completo
Sleep pattern and learning in knockdown mice with reduced cholinergic neurotransmission BJMBR
Queiroz,C.M.; Tiba,P.A.; Moreira,K.M.; Guidine,P.A.M.; Rezende,G.H.S.; Moraes,M.F.D.; Prado,M.A.M.; Prado,V.F.; Tufik,S.; Mello,L.E..
Impaired cholinergic neurotransmission can affect memory formation and influence sleep-wake cycles (SWC). In the present study, we describe the SWC in mice with a deficient vesicular acetylcholine transporter (VAChT) system, previously characterized as presenting reduced acetylcholine release and cognitive and behavioral dysfunctions. Continuous, chronic ECoG and EMG recordings were used to evaluate the SWC pattern during light and dark phases in VAChT knockdown heterozygous (VAChT-KDHET, n=7) and wild-type (WT, n=7) mice. SWC were evaluated for sleep efficiency, total amount and mean duration of slow-wave, intermediate and paradoxical sleep, as well as the number of awakenings from sleep. After recording SWC, contextual fear-conditioning tests were used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sleep-wake cycle; Intermediate sleep; Acetylcholine; Contextual fear conditioning; Memory; Neurodegenerative disorders.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013001000844
Registros recuperados: 6
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional