Results 41 to 50 of about 654 (126)

Coupling of bioelectrochemical toluene oxidation and trichloroethene reductive dechlorination for single-stage treatment of groundwater containing multiple contaminants

Environmental Science and Ecotechnology, 2022
Bioremediation of groundwater contaminated by a mixture of aromatic hydrocarbons and chlorinated solvents is typically challenged because these contaminants are degraded via distinctive oxidative and reductive pathways, thus requiring different ...
Carolina Cruz Viggi, Matteo Tucci, Marco Resitano, Simona Crognale, Maria Letizia Di Franca, Simona Rossetti, Federico Aulenta   +6 more
doaj   +1 more source

Isolation and genomic characterization of a Dehalococcoides strain suggests genomic rearrangement during culture

Scientific Reports, 2017
We have developed and characterized a bacterial consortium that reductively dechlorinates trichloroethene to ethene. Quantitative PCR analysis for the 16S rRNA and reductive dehalogenase genes showed that the consortium is highly enriched with ...
Masafumi Yohda, Kentaro Ikegami, Yuto Aita, Mizuki Kitajima, Ayane Takechi, Megumi Iwamoto, Tomomi Fukuda, Noriyoshi Tamura, Junji Shibasaki, Seiji Koike, Daisuke Komatsu, Sakari Miyagi, Minoru Nishimura, Yoshihito Uchino, Akino Shiroma, Makiko Shimoji, Hinako Tamotsu, Noriko Ashimine, Misuzu Shinzato, Shun Ohki, Kazuma Nakano, Kuniko Teruya, Kazuhito Satou, Takashi Hirano, Osami Yagi   +24 more
doaj   +1 more source

Detection of Organohalide-Respiring Enzyme Biomarkers at a Bioaugmented TCE-Contaminated Field Site

Frontiers in Microbiology, 2019
RNA-based biomarkers have been successfully detected at field sites undergoing in situ bioremediation, but the detection of expressed enzymes is a more direct way to prove activity for a particular biocatalytic process of interest since they provide ...
Gretchen L. W. Heavner, Cresten B. Mansfeldt, Michael J. Wilkins, Carrie D. Nicora, Garrett E. Debs, Elizabeth A. Edwards, Ruth E. Richardson   +6 more
doaj   +1 more source

Microbiome Composition and Dynamics of a Reductive/Oxidative Bioelectrochemical System for Perchloroethylene Removal: Effect of the Feeding Composition

Frontiers in Microbiology, 2022
Chlorinated solvents still represent an environmental concern that requires sustainable and innovative bioremediation strategies. This study describes the microbiome composition of a novel bioelectrochemical system (BES) based on sequential reductive ...
Maria L. Di Franca, Bruna Matturro, Simona Crognale, Marco Zeppilli, Edoardo Dell’Armi, Mauro Majone, Marco Petrangeli Papini, Simona Rossetti   +7 more
doaj   +1 more source

Targeted detection of Dehalococcoides mccartyi microbial protein biomarkers as indicators of reductive dechlorination activity in contaminated groundwater. [PDF]

Sci Rep, 2019
AbstractDehalococcoides mccartyi (Dhc) bacterial strains expressing active reductive dehalogenase (RDase) enzymes play key roles in the transformation and detoxification of chlorinated pollutants, including chlorinated ethenes. Site monitoring regimes traditionally rely on qPCR to assess the presence of Dhc biomarker genes; however, this technique ...
Solis MIV, Abraham PE, Chourey K, Swift CM, Löffler FE, Hettich RL.   +5 more
europepmc   +4 more sources

Tetrachloroethene respiration in Sulfurospirillum species is regulated by a two‐component system as unraveled by comparative genomics, transcriptomics, and regulator binding studies

MicrobiologyOpen, Volume 9, Issue 12, December 2020., 2020
Organohalide‐respiring bacteria need to sense halogenated hydrocarbons in the environment to induce the production of the enzymatic machinery required for their utilization. Identification and characterization of biological sensors for organohalides, such as the two‐component system described here, could guide synthetic approaches for monitoring ...
Jens Esken, Tobias Goris, Jennifer Gadkari, Thorsten Bischler, Konrad U. Förstner, Cynthia M. Sharma, Gabriele Diekert, Torsten Schubert   +7 more
wiley   +1 more source

Sister Dehalobacter Genomes Reveal Specialization in Organohalide Respiration and Recent Strain Differentiation Likely Driven by Chlorinated Substrates

Frontiers in Microbiology, 2016
The genomes of two closely related Dehalobacter strains (strain CF and strain DCA) were assembled from the metagenome of an anaerobic enrichment culture that reductively dechlorinates chloroform (CF), 1,1,1-trichloroethane (1,1,1-TCA) and 1,1 ...
Shuiquan eTang, Po Hsiang eWang, Steven eHiggins, Steven eHiggins, Frank eLoeffler, Frank eLoeffler, Elizabeth Anne Edwards   +6 more
doaj   +1 more source

Microbial degradation of halogenated aromatics: molecular mechanisms and enzymatic reactions

Microbial Biotechnology, Volume 13, Issue 1, Page 67-86, January 2020., 2020
This minireview discusses the molecular mechanisms of the enzymatic reactions for degrading halogenated aromatics which naturally occur in various microorganisms. An in‐depth understanding of how microbes employ various enzymes in biodegradation can lead to the development of new biotechnologies via enzyme/cell/metabolic engineering or synthetic ...
Panu Pimviriyakul, Thanyaporn Wongnate, Ruchanok Tinikul, Pimchai Chaiyen   +3 more
wiley   +1 more source

Impact of Fixed Nitrogen Availability on Dehalococcoides mccartyi Reductive Dechlorination Activity

Environmental Science & Technology, 2019
Biostimulation to promote reductive dechlorination is widely practiced, but the value of adding an exogenous nitrogen (N) source (e.g., NH4+) during treatment is unclear. This study investigates the effect of NH4+ availability on organohalide-respiring Dehalococcoides mccartyi (Dhc) growth and reductive dechlorination in enrichment cultures derived ...
Devrim Kaya, Birthe V. Kjellerup, Karuna Chourey, Robert L. Hettich, Dora M. Taggart, Frank E. Löffler   +5 more
openaire   +3 more sources

Enrichment of Aerobic and Anaerobic Hydrocarbon-Degrading Bacteria from Multicontaminated Marine Sediment in Mar Piccolo Site (Taranto, Italy)

Microorganisms, 2023
Marine sediments act as a sink for the accumulation of various organic contaminants such as polychlorobiphenyls (PCBs). These contaminants affect the composition and activity of microbial communities, particularly favoring those capable of thriving from ...
Bruna Matturro, Maria Letizia Di Franca, Barbara Tonanzi, Carolina Cruz Viggi, Federico Aulenta, Magda Di Leo, Santina Giandomenico, Simona Rossetti   +7 more
doaj   +1 more source