Posts Tagged ‘electrical’

An electric-eel-inspired soft power source from stacked hydrogels

Progress towards the integration of technology into living organisms requires electrical power sources that are biocompatible, mechanically flexible, and able to harness the chemical energy available inside biological systems. Conventional batteries were not designed with these criteria in mind. The electric organ of the knifefish Electrophorus electricus (commonly known as the electric eel) is, however, an example of an electrical power source that operates within biological constraints while featuring power characteristics that include peak potential differences of 600 volts and currents of 1 ampere. Here we introduce an electric-eel-inspired power concept that uses gradients of ions between miniature polyacrylamide hydrogel compartments bounded by a repeating sequence of cation- and anion-selective hydrogel membranes. The system uses a scalable stacking or folding geometry that generates 110 volts at open circuit or 27 milliwatts per square metre per gel cell upon simultaneous, self-registered mechanical contact activation of thousands of gel compartments in series while circumventing power dissipation before contact. Unlike typical batteries, these systems are soft, flexible, transparent, and potentially biocompatible. These characteristics suggest that artificial electric organs could be used to power next-generation implant materials such as pacemakers, implantable sensors, or prosthetic devices in hybrids of living and non-living systems.

Effects of prolonged anoxia on electrical activity of the heart in Crucian carp (Carassius carassius) [RESEARCH ARTICLE]

Elisa Tikkanen, Jaakko Haverinen, Stuart Egginton, Minna Hassinen, and Matti VornanenThe effects of sustained anoxia on cardiac electrical excitability were examined in the anoxia-tolerant Crucian carp (Carassius carassius). The electrocardiogram (ECG…

Brain implant lets paralyzed monkeys walk

Scientists have used a wireless “brain-spinal interface” to bypass spinal cord injuries in a pair […]

The post Brain implant lets paralyzed monkeys walk appeared first on Futurity.

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