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      Low frequency electrical waves in ensembles of proteinoid microspheres

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          Abstract

          Proteinoids (thermal proteins) are produced by heating amino acids to their melting point and initiation of polymerisation to produce polymeric chains. Amino acid-like molecules, or proteinoids, can condense at high temperatures to create aggregation structures called proteinoid microspheres, which have been reported to exhibit strong electrical oscillations. When the amino acids L-Glutamic acid (L-Glu) and L-Aspartic acid (L-Asp) were combined with electric fields of varying frequencies and intensities, electrical activity resulted. We recorded electrical activity of the proteinoid microspheres' ensembles via a pair of differential electrodes. This is analogous to extracellular recording in physiology or EEG in neuroscience but at micro-level. We discovered that the ensembles produce spikes of electrical potential, an average duration of each spike is 26 min and average amplitude is 1 mV. The spikes are typically grouped in trains of two spikes. The electrical activity of the ensembles can be tuned by external stimulation because ensembles of proteinoid microspheres can generate and propagate electrical activity when exposed to electric fields.

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          Author and article information

          Journal
          04 January 2023
          Article
          2302.06416
          b3616575-d2b8-4f62-945b-1c562d3ab5c4

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          Custom metadata
          cond-mat.mtrl-sci cs.ET physics.bio-ph

          Condensed matter,Biophysics,General computer science
          Condensed matter, Biophysics, General computer science

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