{"id":11949,"date":"2016-01-01T16:55:06","date_gmt":"2016-01-01T16:55:06","guid":{"rendered":"http:\/\/lequia-udg.com\/2016\/01\/01\/bidirectional-microbial-electron-transfer-switching-an-acetate-oxidizing-biofilm-to-nitrate-reducing-conditions\/"},"modified":"2024-04-18T17:24:14","modified_gmt":"2024-04-18T17:24:14","slug":"bidirectional-microbial-electron-transfer-switching-an-acetate-oxidizing-biofilm-to-nitrate-reducing-conditions","status":"publish","type":"post","link":"https:\/\/lequia-udg.com\/ca\/2016\/01\/01\/bidirectional-microbial-electron-transfer-switching-an-acetate-oxidizing-biofilm-to-nitrate-reducing-conditions\/","title":{"rendered":"Bidirectional microbial electron transfer: switching an acetate oxidizing biofilm to nitrate reducing conditions"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t

\r\n\t\t\t\r\n\t\t\t\tAuthors: Narc\u00eds Pous, Alessandro A. Carmona-Mart\u00ednez, Anna Vilajeliu-Pons, Erika Fiset, Lluis Ba\u00f1eras, Eric Trably, M. Dolors Balaguer, Jes\u00fas Colprim, Nicolas Bernet, Sebasti\u00e0 Puig \r\n\t\t\t\r\n\t\t\t<\/h4>\r\n\t\t

\r\n\t\t\t\r\n\t\t\t\tBidirectional microbial electron transfer: switching an acetate oxidizing biofilm to nitrate reducing conditions\r\n\t\t\t\r\n\t\t\t<\/h2>\r\n\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Up to date a few electroactive bacteria embedded in biofilms are described to catalyze both anodic and cathodic reactions in bioelectrochemical systems (i.e. bidirectional electron transfer). How these bacteria transfer electrons to or from the electrode is still uncertain. In this study the extracellular electron transfer mechanism of bacteria within an electroactive biofilm was investigated by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). First, a mature anodic electroactive biofilm was developed from an activated sludge sample (inoculum), acetate as electron donor and a poised electrode (+397 mV vs. SHE). Later, this biofilm was \u201cswitched\u201d to biocathodic conditions by feeding it with a medium containing nitrates and poising the electrode at \u2013303 mV vs. SHE. The electrochemical characterization indicated that both, acetate oxidation and nitrate reduction took place at a similar formal potential of \u2212175\u00b105 and \u2212175\u00b134 mV vs. SHE, respectively. The biofilm was predominantly composed by Geobacter<\/em> sp. at both experimental conditions. Taken together, the results indicated that both processes could be catalyzed by using the same electron conduit, and most likely by the same bacterial consortium. Hence, this study suggests that electroactive bacteria within biofilms could use the same electron transfer conduit for catalyzing anodic and cathodic reactions.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tInformaci\u00f3 addicional<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t
\n\n\n\n\n\n
Any:<\/strong><\/td>\n2016<\/td>\n<\/tr>\n
Authors:<\/strong><\/td>\nNarc\u00eds Pous, Alessandro A. Carmona-Mart\u00ednez, Anna Vilajeliu-Pons, Erika Fiset, Lluis Ba\u00f1eras, Eric Trably, M. Dolors Balaguer, Jes\u00fas Colprim, Nicolas Bernet, Sebasti\u00e0 Puig<\/td>\n<\/tr>\n
Reference:<\/strong><\/td>\nBiosensors and Bioelectronics, Volume 75, 15 January 2016, Pages 352-358<\/td>\n<\/tr>\n
Link:<\/strong><\/td>\nhttp:\/\/dx.doi.org\/10.1016\/j.bios.2015.08.035<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t
<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Authors: Narc\u00eds Pous, Alessandro A. Carmona-Mart\u00ednez, Anna Vilajeliu-Pons, Erika Fiset, Lluis Ba\u00f1eras, Eric Trably, M. Dolors Balaguer, Jes\u00fas Colprim, Nicolas Bernet, Sebasti\u00e0 Puig Bidirectional microbial electron transfer: switching an acetate oxidizing biofilm to nitrate reducing conditions Up to date a few electroactive bacteria embedded in biofilms are described to catalyze both anodic and cathodic reactions … Bidirectional microbial electron transfer: switching an acetate oxidizing biofilm to nitrate reducing conditions<\/span>“>Continue reading Bidirectional microbial electron transfer: switching an acetate oxidizing biofilm to nitrate reducing conditions<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[],"class_list":["post-11949","post","type-post","status-publish","format-standard","hentry","category-articles-ca"],"_links":{"self":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/11949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/comments?post=11949"}],"version-history":[{"count":1,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/11949\/revisions"}],"predecessor-version":[{"id":11950,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/posts\/11949\/revisions\/11950"}],"wp:attachment":[{"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/media?parent=11949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/categories?post=11949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lequia-udg.com\/ca\/wp-json\/wp\/v2\/tags?post=11949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}