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Chin. Phys. B, 2011, Vol. 20(3): 030503    DOI: 10.1088/1674-1056/20/3/030503
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Effects of an electromagnetic field on intracellular calcium oscillations in a cell with external noise

Duan Wei-Long(段卫龙)a),Yang Lin-Jing(杨林静)b),and Mei Dong-Cheng(梅冬成)a)
a Department of Physics, Yunnan University, Kunming 650091, China; b College of Chinese Medicine, Yunnan University of Traditional Chinese Medicine, Kunming 650031, China
Abstract  Intracellular calcium ion concentration oscillation in a cell subjected to external noise and irradiated by an electromagnetic field is considered. The effects of the intensity $E_{0}$, the polar angle $\theta $ and  the frequency $\omega $ of the external electric field on steady-state probability distribution and the mean Ca$^{2 + }$ concentration, respectively, are investigated by a numerical calculation method. The results indicate  that (i) variation of $\omega $ cannot affect the intracellular calcium oscillation; (ii) the steady-state probability distribution presents a meaningful modification due to the variations of $E_{0} $ and $\theta $, while variation of $\theta $ does not affect the steady-state probability distribution under the condition of a small $E_0 $, and $E_0 $ cannot affect the steady-state probability distribution either when $\theta = \pi/2$; (iii) the  mean Ca$^{2 + }$ concentration increases as $E_0 $ increases when $\theta < \pi / 2$ and, as $\theta $ increases, it first increases and then decreases. However, it does not vary with $E_0 $ increasing when $\theta = \pi/2$,  but it increases with $\theta $ increasing when $E_0 $ is small.
Keywords:  fluctuation phenomena      interactions of biosystems with radiations  
Received:  06 September 2010      Revised:  28 September 2010      Accepted manuscript online: 
PACS:  05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion)  
  87.50.-a (Effects of electromagnetic and acoustic fields on biological systems)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10865006) and the Science Foundation of Yunnan University, China (Grant No. 2009A001Z).

Cite this article: 

Duan Wei-Long(段卫龙), Yang Lin-Jing(杨林静), and Mei Dong-Cheng(梅冬成) Effects of an electromagnetic field on intracellular calcium oscillations in a cell with external noise 2011 Chin. Phys. B 20 030503

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