R
Roberto Orellana
Researcher at Valparaiso University
Publications - 17
Citations - 983
Roberto Orellana is an academic researcher from Valparaiso University. The author has contributed to research in topics: Geobacter & Geobacter sulfurreducens. The author has an hindex of 8, co-authored 15 publications receiving 758 citations. Previous affiliations of Roberto Orellana include University of Massachusetts Amherst & Federico Santa María Technical University.
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Book ChapterDOI
Geobacter: The Microbe Electric's Physiology, Ecology, and Practical Applications
Derek R. Lovley,Toshiyuki Ueki,Tian Zhang,Nikhil S. Malvankar,Pravin Malla Shrestha,Kelly A. Flanagan,Muktak Aklujkar,Jessica E. Butler,Ludovic Giloteaux,Amelia-Elena Rotaru,Dawn E. Holmes,Ashley E. Franks,Roberto Orellana,Carla Risso,Kelly P. Nevin +14 more
TL;DR: The study of Geobacter species has revealed a remarkable number of microbial physiological properties that had not previously been described in any microorganism, which might contribute to the field of bioelectronics.
Journal ArticleDOI
Living at the Frontiers of Life: Extremophiles in Chile and Their Potential for Bioremediation.
Roberto Orellana,Roberto Orellana,Constanza C. Macaya,Guillermo Bravo,Flavia Dorochesi,Andrés Cumsille,Ricardo Valencia,Claudia Rojas,Michael Seeger +8 more
TL;DR: Interestingly, the remarkable adaptative capabilities of extremophiles convert them into an attractive source of catalysts for bioremediation and industrial processes.
Journal ArticleDOI
Characterization and transcription of arsenic respiration and resistance genes during in situ uranium bioremediation.
Ludovic Giloteaux,Dawn E. Holmes,Kenneth H. Williams,Kelly C. Wrighton,Michael J. Wilkins,Alison P. Montgomery,Jessica A. Smith,Roberto Orellana,Courtney A Thompson,Thomas J Roper,Philip E. Long,Derek R. Lovley +11 more
TL;DR: Results demonstrate that subsurface Geobacter species can tightly regulate their physiological response to changes in groundwater arsenic concentrations, and should be useful for the study of a diversity of other environments in which Geobacteria species are considered to have an important influence on arsenic biogeochemistry.
Journal ArticleDOI
U(VI) Reduction by Diverse Outer Surface c-Type Cytochromes of Geobacter sulfurreducens
Roberto Orellana,Janet J. Leavitt,Luis R. Comolli,Roseann Csencsits,Noémie Janot,Kelly A. Flanagan,Arianna S. Gray,Ching Leang,Mounir Izallalen,Tünde Mester,Derek R. Lovley +10 more
TL;DR: Transmission electron microscopy and X-ray energy dispersion spectroscopy revealed that wild-type cells did not precipitate uranium along pili as previously reported, but U(IV) was precipitated at the outer cell surface.
Journal ArticleDOI
Proteome of Geobacter sulfurreducens in the presence of U(VI).
Roberto Orellana,Kim K. Hixson,Sean Jean-Loup Murphy,Tünde Mester,Manju L. Sharma,Mary S. Lipton,Derek R. Lovley +6 more
TL;DR: The results suggested that there is no specific mechanism for uranium detoxification, rather, multiple general stress responses are induced, which presumably enable Geobacter species to tolerate high uranium concentrations.