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Electrical impedance spectroscopy for evaluation of the influence of simulated weightlessness on the electrical properties of rat blood / 生物医学工程学杂志
Journal of Biomedical Engineering ; (6): 653-662, 2012.
Artigo em Chinês | WPRIM | ID: wpr-271715
ABSTRACT
In the present study, the AC impedance of rat blood was measured with Agilent 4294A impedance analyzer in the frequency range of 10(4)-10(8) Hz, and the effect of simulated weightlessness (SWL)on electrical properties of rat blood was investigated by analyzing the data characteristics with the use of electrical impedance spectroscopy, the Bode diagram, the Nyquist diagram and the Nichols diagram. The results demonstrated 60 days SWL caused some changes (1) the electrical impedance of rat blood were reduced, mainly in the real part of complex impedance (Z'o and Z'infinity), the electrical impedance modulus amplitude (|Z*|o and |Z*|infinity), the impedance relaxation strength (deltaZ', delta|Z*|) and the logarithm of impedance modulus amplitude at low frequency (Log |Z*|o) were lower than that in the control (CON) group; (2) the characteristic frequency of the electrical impedance spectrum of rat blood and the phase angle were increases, mainly in the characteristic frequency (fc1, fc2) and the phase angle [theta(p) (degree), theta(p) (radian)] increased compared with that in the CON group. These data indicate that SWL leads to reduced resistivity and enhanced conductivity of blood.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Sangue / Fenômenos Fisiológicos Sanguíneos / Impedância Elétrica / Simulação de Ausência de Peso / Espectroscopia Dielétrica / Métodos Limite: Animais Idioma: Chinês Revista: Journal of Biomedical Engineering Ano de publicação: 2012 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Sangue / Fenômenos Fisiológicos Sanguíneos / Impedância Elétrica / Simulação de Ausência de Peso / Espectroscopia Dielétrica / Métodos Limite: Animais Idioma: Chinês Revista: Journal of Biomedical Engineering Ano de publicação: 2012 Tipo de documento: Artigo