<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Karamash, Maksym</style></author><author><style face="normal" font="default" size="100%">Stumpe, Michael</style></author><author><style face="normal" font="default" size="100%">Dengjel, Jörn</style></author><author><style face="normal" font="default" size="100%">Salgueiro, , Carlos A.</style></author><author><style face="normal" font="default" size="100%">Giese, Bernd</style></author><author><style face="normal" font="default" size="100%">Fromm, Katharina M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Reduction Kinetic of Water Soluble Metal Salts by Geobacter sulfurreducens: Fe2+/Hemes Stabilize and Regulate Electron Flux Rates</style></title><secondary-title><style face="normal" font="default" size="100%">Frontiers in Microbiology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2022</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.frontiersin.org/article/10.3389/fmicb.2022.909109</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">13</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Geobacter sulfurreducens is a widely applied microorganism for the reduction of toxic metal salts, as an electron source for bioelectrochemical devices, and as a reagent for the synthesis of nanoparticles. In order to understand the influence of metal salts, and of electron transporting, multiheme c-cytochromes on the electron flux during respiration of G. sulfurreducens, the reduction kinetic of Fe&lt;sup&gt;3+&lt;/sup&gt;, Co&lt;sup&gt;3+&lt;/sup&gt;, V&lt;sup&gt;5+&lt;/sup&gt;, Cr&lt;sup&gt;6+&lt;/sup&gt;, and Mn&lt;sup&gt;7+&lt;/sup&gt; containing complexes were measured. Starting from the resting phase, each G. sulfurreducens cell produced an electron flux of 3.7 × 10&lt;sup&gt;5&lt;/sup&gt; electrons per second during the respiration process. Reduction rates were within ± 30% the same for the 6 different metal salts, and reaction kinetics were of zero order. Decrease of c-cytochrome concentrations by downregulation and mutation demonstrated that c-cytochromes stabilized respiration rates by variation of their redox states. Increasing Fe&lt;sup&gt;2+&lt;/sup&gt;/heme levels increased electron flux rates, and induced respiration flexibility. The kinetic effects parallel electrochemical results of G. sulfurreducens biofilms on electrodes, and might help to optimize bioelectrochemical devices.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;n/a&lt;/p&gt;
</style></notes></record></records></xml>