RESUMO
Microelectrophysiological and computer techniques were used in the study of background impulse activity (BIA) of the internal geniculate body (IGB) neurons and mesencephalic inferior tubers (MIT) of white rats. Definite differences were found in BIA by regularity, dynamic types and modality of interimpulse histograms. Mean frequency of MIT neuron discharges was 16-17 Hz and was about 3 times higher than in neurons of the IGB. Intraperitoneal injection of taurin noticeably suppressed neuronal activity in both nuclei. The drug reduced mean frequency of background impulse discharges both in MIT and IGB. Thus, taurin produces primarily suppressing modulating effect on neuronal activity of IGB and MIT.
Assuntos
Núcleo Coclear/efeitos dos fármacos , Corpos Geniculados/efeitos dos fármacos , Corpos Geniculados/fisiologia , Neurônios/efeitos dos fármacos , Neurônios/fisiologia , Taurina/farmacologia , Teto do Mesencéfalo/efeitos dos fármacos , Teto do Mesencéfalo/fisiologia , Potenciais de Ação/fisiologia , Animais , Núcleo Coclear/fisiologia , Computadores , Interpretação Estatística de Dados , Eletrofisiologia , Injeções Intraperitoneais , Microeletrodos , Analisadores Neurais/fisiologia , Ratos , Taurina/administração & dosagemRESUMO
A study was made of the combined effect of laser (helium-neon laser, lambda = 633 nm) and alpha-radiation on survival of Escherichia coli K-12 cells of different genotypes. Pre- and post-irradiation exposures to laser-radiation diminished the damaging effect of alpha-particles. In the latter case, modification of survival was more pronounced.
Assuntos
Escherichia coli/efeitos da radiação , Lasers , Tolerância a Radiação , Partículas alfa , Escherichia coli/genética , Escherichia coli/crescimento & desenvolvimento , MutaçãoRESUMO
A study was made of the combined effect of laser radiation (helium-neon laser, lambda = 633 nm) and X-rays on bacteria of different genotypes. The sensitivity of cells to X-rays was decreased by pre- and post-irradiation with laser. In the latter case, the radio-modifying effect of laser was more pronounced.