ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

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Pavlov A. N., Sosnovtseva O. V. Application of double-wavelet analysis to study modulation phenomena in dynamics of nephrons. Izvestiya VUZ. Applied Nonlinear Dynamics, 2004, vol. 12, iss. 6, pp. 105-117. DOI: 10.18500/0869-6632-2004-12-6-105-117

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Russian
Heading: 
Applied Problems of Nonlinear Oscillation and Wave Theory
Article type: 
Article
UDC: 
517.9
DOI: 
10.18500/0869-6632-2004-12-6-105-117

Application of double-wavelet analysis to study modulation phenomena in dynamics of nephrons

Autors: 
Pavlov Aleksej Nikolaevich, Saratov State University
Sosnovtseva Olga Vladimirovna, Danmarks Tekniske Universitet
Abstract: 

Based on the double-wavelet analysis, the paper proposes a method to study interaction phenomena of rhythmic components in nonstationary multimode dynamics. Possibilities and limitations of the approach are illustrated for a number of test examples. Application of the double-wavelet analysis is considered for tubular pressure signals from rat nephrons in order to quantify the modulation phenomena of the fast (myogenic) dynamics of nephrons by the slow rhythm caused by the tubulo-glomerular feedback mechanism. It is shown that interaction between the two mechanisms is stronger in hypertensive rats than in normotensive rats.

Key words: 
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Acknowledgments: 
The authors would like to thank E. Mosekilde, N.-H. Holstein-Rathlou and D.J. Marsh for providing experimental data and for numerous discussions. The work was supported by the grant INTAS 01-2061. A.N. Pavlov thanks individual support with grants from the President of Russia (MK-2512.2004.2), Ministry of Education and Science of the Russian Federation and CRDF (Y1-P-06-06).
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Received: 
20.01.2005
Accepted: 
19.04.2005
Published: 
15.06.2005
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