Electrical potential spiking of kombucha zoogleal mats

Adamatzky, Andrew

doi:10.1101/2022.08.03.502684

Cited by 4 publications

(9 citation statements)

References 61 publications

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“…First, we can attempt to develop bio-hybrid sensors. Previously, we demonstrated that a dynamics of electrical potential of kombucha is changing after optical, chemical and electrical stimulation [33]. If a dynamic of electrical resistance is somehow linked to the dynamic of electrical potential, we could propose that a stimulation of kombucha zoogleal mat might lead to changes in their resistance.…”

Section: Discussionmentioning

confidence: 95%

“…Whilst we could not provide any firm propositions, our vision is that the resistance spikes might be byproducts of the electrical potential spiking in kombucha mat. Let us compare parameters of kombucha mats’ electrical potential spiking analysed in [33] with parameters of electrical resistance spiking. There are 3.2 electrical potential spikes in average in a train of spikes, median 3.…”

Section: Discussionmentioning

confidence: 99%

“…This all indicates that, possibly, travelling waves of electrical activity in kombucha mats change biochemical composition of the mats to temporarily modify their resistance. As we discussed in [33], electrical potential spiking in kombucha mats might be due the waves of depolarisation, emerging due to metabolically triggered release of potassium, travelling in zoogleal mats. An evidence of such travelling waves, albeit in bacterial films, is provided in [50].…”

Section: Discussionmentioning

confidence: 99%

“…First, kombucha zoogleal mats can be used as ultra-low cost and fast-to-produce components of future living electronics, sensing and computing devices. We have already demonstrated a potentially unique properties of kombucha mats via analysis of their electrical potential dynamics [33]. We have also shown that acetobacter colonies, which form thick bacterial films, can be used for sensing purposes [34, 35].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of electrical resistance of kombucha zoogleal mats

Adamatzky

2022

Preprint

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We demonstrate that zoogleal mats of kombucha exhibit spikes of electrical resistance. A kombucha is a sugared tea fermented by a symbiotic community of over twenty species of bacteria and yeasts which produce cellulosic gelatinous zoogleal mats. We recorded electrical resistance of the zoogleal mats via platinum electrodes placed at a distance one centimetre of each other. We found that the mats show temporal variations in electrical resistance in a range 0.13~MOhm to 0.19~MOhm. We discovered spikes of the mats resistance morphologically similar to action potential spikes. Average duration of a resistance spike is 1.8~min, average amplitude is 2.2~kOhm. Average interval between resistance spikes is c. 20~min. The discovered resistive spiking of kombucha mats might indicate on their memfractive properties, and thus open pathways towards prototyping neuromorphic devices with living zoogleal mats.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of electrical resistance of kombucha zoogleal mats

Adamatzky

2022

Preprint

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“…Mycelium-bound composites, consisting of organic substrates that have been colonised by fungi, are very promising biomaterials with significant environmental sustainability. These materials are currently being used in applications such as providing acoustic and thermal insulation for wall cladding and packaging 36 .…”

Section: Current--voltage Plots Show Signature Of Memfractancementioning

confidence: 99%

Living Kombucha Electronics with Proteinoids

Nikolaidou,

Mougkogiannis,

Adamatzky

2023

Preprint

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The work introduces a composite material that combines Kombucha cellulose mats with synthetic thermal proteinoids to create electroactive biofilms, capable for sensing and computation. The synthesis of proteinoids involves heating amino acid mixtures, which leads to the formation of proto–cell structures capable of biological electrical signalling. We demonstrate that these hybrid biofilms exhibit adjustable memristive and memfractance properties, which can be utilised for unconventional computing tasks. The potential applications of living biofilms extend beyond neural interfaces, encompassing bioinspired robotics, smart wearables, adaptive biorobotic systems, and other technologies that rely on dynamic bioelectronic materials. The composite films offer a wide range of options for synthesis and performance customisation. Current research is dedicated to customising the composition, nanostructure, and integration of proteinoids in hybrid circuits to achieve specific electronic functionalities. Overall, these cross–kingdom biofilms are an intriguing category of materials that combine the unique properties of biological organisms and smart polymers. The Kombucha–proteinoid composites are a significant step forward in the development of future technologies that bridge the gap between living and artificial life systems. These composites have the remarkable ability to support cellular systems and demonstrate adaptive bioelectronic behaviour.

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Functionalizing the Electrical Properties of Kombucha Zoogleal Mats for Biosensing Applications

Nikolaidou,

Chiolerio,

Dehshibi

et al. 2024

ACS Omega

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Kombucha is a type of tea that is fermented using yeast and bacteria. During this process, a film made of cellulose is produced. This film has unique properties such as biodegradability, flexibility, shape conformability, and ability to self-grow as well as be produced across customized scales. In our previous studies, we demonstrated that Kombucha mats exhibit electrical activity represented by spikes of the electrical potential. We propose using microbial fermentation as a method for in situ functionalization to modulate the electroactive nature of Kombucha cellulose mats, where graphene and zeolite were used for the functionalization. We subjected the pure and functionalized Kombucha mats to mechanical stimulation by applying different weights and geometries. Our experiments demonstrated that Kombucha mats functionalized with graphene and zeolite exhibit memfractive properties and respond to load by producing distinctive spiking patterns. Our findings present incredible opportunities for the in situ development of functionalized hybrid materials with sensing, computing, and memory capabilities. These materials can selfassemble and self-grow after they fuse their living and synthetic components. This study contributes to an emergent area of research on bioelectronic sensing and hybrid living materials, opening up exciting opportunities for use in smart wearables, diagnostics, health monitoring, and energy harvesting applications.

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Electrical potential spiking of kombucha zoogleal mats

Cited by 4 publications

References 61 publications

Dynamics of electrical resistance of kombucha zoogleal mats

Dynamics of electrical resistance of kombucha zoogleal mats

Living Kombucha Electronics with Proteinoids

Functionalizing the Electrical Properties of Kombucha Zoogleal Mats for Biosensing Applications

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