Bacterium Shewanella

Bacterium May Help to Create bio-batterie

The scientists know that a bacterium of Shewanella oneidensis living in depths of oceans
is capable to develop an electric current at contact with heavy metals. The scientists from the University of East Asia start the new research directed on studying of how bacteria develop electricity, when proteins in cellular membranes contact to a mineral surface. This study is an important step in a way of creation bio-batteries. For the production the necessary quantity of energy for life of bacterium, the proteins can “transport” electrons through a membrane in a high speed. Just as people breathe oxygen and use it for generation of energy, bacterium of Shewanella can use minerals, like iron oxide, for breath. According to the scientists, they know the movement of bacteria’s electrons through cellular membranes, but the transformation of electrons from bacteria into the minerals, still is not clearly for them. The scientists have two versions regarding this process. Proteins transport electrons directly on a mineral surface, or proteins by means of other molecules carry out “transfer” of electrons through a cellular membrane. The scientists demonstrated the process but they used similar bubbles instead of real bacterial cages. Experiments made in the oxygen-free environment as oxygen can participate in chemical reactions. The research proves, that the proteins can directly “touch” a surface of minerals and make an electric current, which means that bacterium can install electrical equipment  or bio-batteries through membranes, being on a mineral or metal surface. For scientists better understanding of processes, which happen with participation of this bacterium, they will be able to create bio-batteries.

source:sciencenetlinks.com