Biological systems manifest continuous weak autoluminescence, which is present even in the absence of external stimuli. Since this autoluminescence arises from internal metabolic and physiological processes, several works suggested that it could carry information in the time series of the detected photon counts. However, there is little experimental work which would show any difference of this signal from random Poisson noise and some works were prone to artifacts due to lacking or improper reference signals. Here we apply rigorous statistical methods and advanced reference signals to test the hypothesis whether time series of autoluminescence from germinating mung beans display any intrinsic correlations. Utilizing the fractional Brownian bridge that employs short samples of time series in the method kernel, we suggest that the detected autoluminescence signal from mung beans is not totally random, but it seems to involve a process with a negative memory. Our results contribute to the development of the rigorous methodology of signal analysis of photonic biosignals.

Czech Technical University Faculty of Nuclear Sciences and Physical Engineering Trojanova 12 Praha Czechia

Department of Circuit Theory of the Faculty of Electrical Engineering at Czech Technical University Prague Technická 2 Praha 6 Czechia

Institute of Photonics and Electronics of the Czech Academy of Sciences Chaberská 57 Praha 8 Czechia

Citace poskytuje Crossref.org