IPC PAC Conference Papers

Recent Submissions

Displaying 1 - 4 of 4 records
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    Anti-phase Oscillations and Nonuniform Stationary State in Coupled Glycolytic Oscillators
    (Society of Physical Chemists of Serbia, 2022-12-13) Muzika, František; Valent, Ivan; Institute of Physical Chemistry, Polish Academy of Sciences; Department of Physical and Theoretical Chemistry Faculty of Natural Sciences Comenius University in Bratislava, Slovakia
    Our study is focused on experimental observations of NADH oscillations and nonuniform stationary states in glycolytic oscillatory reaction. Glycolysis occurs using yeast extract and glucose solution reaction in a two coupled cells system with reciprocal peristaltic pumping. Enzymatic reaction is measured in two UV-vis spectrophotometers, specifically 340nm for NADH. We report occurrence of anti-phase oscillations of NADH and nonuniform stationary state induced by set of chemical and physical perturbations. Transitions between oscillations and nonuniform stationary states can be used in area of chemical computing.
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    A BZ Assemblage Working for a Day
    (Society of Physical Chemists of Serbia, 2021-12-15) Muzika, František; Górecki, Jerzy; Institute of Physical Chemistry Polish Academy of Sciences
    Our work is focused on the experimental observation of Bielousov-Zhabotinsky reaction oscillations in ferroin loaded Dowex 50w beads in a batch reactor open to the atmosphere. We investigated the conditions for the maximum oscillation lifetime and the change of wave regimes as the answer to the applied potential. The catalyst-free solution in the batch reactor is a mixture of concentrated sulphuric acid, NaBrO3, and different ratios of malonic acid and 1,4 cyclohexanedione. We are using three types of cation Dowex 50w beads, namely type x2, x8, which differ by their level of crosslinking and cation exchange capacity. Their mesh size is 16-50 and 50-100. We investigate the influence of such parameters as the distance between a bead and the electrode and the value of electrode potential on the oscillations. Moreover, we study the character of oscillations in the function of the number of adjacent beads and the layout of the beads.The reduction of formation of CO2 bubbles has been achieved by choice of Dowex beads type, solution composition, and usage of acetone.We report oscillations with stable amplitude and varying period and lifetime over 19 hours and oscillations with decreasing amplitude with a lifetime of 10 hours. The investigated media and beads type seem to be promising candidates for experimental realization of chemical computers based on interacting oscillators.
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    Determination of psychotic behaviour using a network of chemical oscillators
    (International Frequency Sensor Association (IFSA) Publishing, S. L., 2020) Bose, Ashmita; Gorecki, Jerzy; Institute of Physical Chemistry, Polish Academy of Sciences
    Schizophrenia is the most common form of psychotic behaviour where patients experiences hallucination, dillusion or chaotic speech. Schizophrenia is difficult to detect and easily go undetected for years. Here we propose the idea of detecting schizophrenia by a network of interacting chemical oscillators. We optimized a classifier based on six interacting oscillator using genetic algorithm and obtained 82% accuracy of schizophrenia detection on a selected training dataset.
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    Better red than dead: On the influence of Oil Red O dye on complexity of evolution of a camphor-paraffin droplet on the water surface
    (2018) Loffler, Richard J. G.; Hanczyc, Martin M.; Gorecki, Jerzy; Institute of Physical Chemistry, Polish Academy of Sciences; Laboratory for Artificial Biology, Centre for Integrative Biology (CIBIO), Universita‘ degli Studi di Trento, Trento, Italy; Chemical and Biological Engineering, University of New Mexico, Albuquerque, USA
    Droplets of paraffin can show self-motion when powered by camphor. We investigated the motion of such droplets when varying concentrations of camphor and the dye, Oil Red O, as well as the droplet volume. Experiments have shown that the presence of the Oil Red O dye in the system can significantly increase the complexity of droplet evolution, if compared to the case where the dye is absent. Just by increasing the concentration of Oil Red O, the droplet achieves a complex evolution of motion before it splits into many self-propelled secondary objects expressing motion similar to the progenitor droplet. Therefore, the system replicates and the behavior persists. When many division events occur from a single droplet, the collective motion appears similar to swarming behavior of living creatures. This system provides a wet lab, artificial life model to study the temporal evolution of behavior.