Výsledky vyhledávání - "Stefan Cretnik"

Akademický článek

Chlorine Isotope Effects from Isotope Ratio Mass Spectrometry Suggest Intramolecular C-Cl Bond Competition in Trichloroethene (TCE) Reductive Dehalogenation

Autor: Stefan Cretnik, Anat Bernstein, Orfan Shouakar-Stash, Frank Löffler, Martin Elsner

Publikováno v: Molecules, Vol 19, Iss 5, Pp 6450-6473 (2014)

Chlorinated ethenes are prevalent groundwater contaminants. To better constrain (bio)chemical reaction mechanisms of reductive dechlorination, the position-specificity of reductive trichloroethene (TCE) dehalogenation was investigated. Selective biot

Externí odkaz: https://doaj.org/article/ca90bcaba6ad4006a1b2a9a6ff012de5

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Reductive Outer-Sphere Single Electron Transfer Is an Exception Rather than the Rule in Natural and Engineered Chlorinated Ethene Dehalogenation

Autor: Benjamin Heckel, Martin Elsner, Stefan Cretnik, Sarah Kliegman, Orfan Shouakar-Stash, Kristopher McNeill

Publikováno v: Environmental Science & Technology. 51:9663-9673

Chlorinated ethenes (CEs) such as perchloroethylene, trichloroethylene and dichloroethylene are notorious groundwater contaminants. Although reductive dehalogenation is key to their environmental and engineered degradation, underlying reaction mechan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3bddc8fd7822eaf7dddefadff79c878
https://doi.org/10.1021/acs.est.7b01447

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Cl and C isotope analysis to assess the effectiveness of chlorinated ethene degradation by zero-valent iron: Evidence from dual element and product isotope values

Autor: Orfan Shouakar-Stash, Martin Elsner, Albert Soler, Carme Audí-Miró, Jordi Palau, Neus Otero, Stefan Cretnik

Publikováno v: Applied Geochemistry. 32:175-183

This study investigated C and, for the first time, Cl isotope fractionation of trichloroethene (TCE) and cis-dichloroethene (cis-DCE) during reductive dechlorination by cast zero-valent iron (ZVI). Hydrogenolysis and β-dichloroelimination pathways o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9339841626cbf8c88f5ceb1719962181
https://doi.org/10.1016/j.apgeochem.2012.08.025

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Contrasting dual (C, Cl) isotope fractionation offers potential to distinguish reductive chloroethene transformation from breakdown by permanganate

Autor: Nico Boon, Shiran Qiu, Leen Bastiaens, Orfan Shouakar-Stash, Siavash Atashgahi, Winnie Dejonghe, Martin Elsner, Stefan Cretnik, Eylem Doğan-Subaşı

Publikováno v: Sci. Total Environ. 596-597, 169-177 (2017)

cis -1,2-Dichloroethene ( cis -DCE) and trichloroethene (TCE) are persistent, toxic and mobile pollutants in groundwater systems. They are both conducive to reductive dehalogenation and to oxidation by permanganate. In this study, the potential of du

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c03f027fff971c30513001acd6aa3540
https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=50970

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C, Cl and H compound-specific isotope analysis to assess natural versus Fe(0) barrier-induced degradation of chlorinated ethenes at a contaminated site

Autor: Mònica Rosell, Martin Elsner, Stefan Cretnik, Clara Torrentó, Orfan Shouakar-Stash, Albert Soler, Neus Otero, Carme Audí-Miró, Jordi Palau

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

Compound-specific isotopic analysis of multiple elements (C, Cl, H) was tested to better assess the effect of a zero-valent iron-permeable reactive barrier (ZVI-PRB) installation at a site contaminated with tetrachloroethene (PCE) and trichloroethene

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d11be2e252409e6df57760acde3c6c3d
http://hdl.handle.net/2445/155353

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Combined C and Cl isotope effects indicate differences between corrinoids and enzyme (Sulfurospirillum multivorans PceA) in reductive dehalogenation of tetrachloroethene, but not trichloroethene

Autor: Martin Elsner, Julian Renpenning, Torsten Schubert, Ivonne Nijenhuis, Orfan Shouakar-Stash, Stefan Cretnik, Sebastian Keller

Publikováno v: Environmental sciencetechnology. 48(20)

The role of the corrinoid cofactor in reductive dehalogenation catalysis by tetrachloroethene reductive dehalogenase (PceA) of Sulfurospirillum multivorans was investigated using isotope analysis of carbon and chlorine. Crude extracts containing PceA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91dada193af7d0fd3f565637ae86ae75
https://pubmed.ncbi.nlm.nih.gov/25216120

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C and Cl isotope fractionation of 1,2-dichloroethane displays unique δ¹³C/δ³⁷Cl patterns for pathway identification and reveals surprising C-Cl bond involvement in microbial oxidation

Autor: Jordi, Palau, Stefan, Cretnik, Orfan, Shouakar-Stash, Martina, Höche, Martin, Elsner, Daniel, Hunkeler

Publikováno v: Environmental sciencetechnology. 48(16)

This study investigates dual element isotope fractionation during aerobic biodegradation of 1,2-dichloroethane (1,2-DCA) via oxidative cleavage of a C-H bond (Pseudomonas sp. strain DCA1) versus C-Cl bond cleavage by S(N)2 reaction (Xanthobacter auto

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::caa635665d3a59a28d71c04671f6822c
https://pubmed.ncbi.nlm.nih.gov/25010210

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Reductive dechlorination of TCE by chemical model systems in comparison to dehalogenating bacteria: insights from dual element isotope analysis (13C/12C, 37Cl/35Cl)

Autor: Kristen A. Thoreson, Martin Elsner, Christine Laskov, Daniel Buchner, Orfan Shouakar-Stash, Stefan Cretnik, Kristopher McNeill, Sarah Kliegman, Karin Ebert, Anat Bernstein, Stefan B. Haderlein

Publikováno v: Environmental sciencetechnology. 47(13)

Chloroethenes like trichloroethene (TCE) are prevalent environmental contaminants, which may be degraded through reductive dechlorination. Chemical models such as cobalamine (vitamin B12) and its simplified analogue cobaloxime have served to mimic mi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3edef47d45c0a89013019b09bb902be3
https://pubmed.ncbi.nlm.nih.gov/23627862

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Compound-specific chlorine isotope analysis: a comparison of gas chromatography/isotope ratio mass spectrometry and gas chromatography/quadrupole mass spectrometry methods in an interlaboratory study

Autor: Simon Jeannottat, Christine Laskov, Martin Elsner, Orfan Shouakar-Stash, Stefan Cretnik, Kaori Sakaguchi-Söder, Stefan B. Haderlein, Johannes Jager, Torsten C. Schmidt, Ramon Aravena, Karin Ebert, Jens Laaks, Maik A. Jochmann, Anat Bernstein, Daniel Hunkeler

Publikováno v: Analytical Chemistry

Chlorine isotope analysis of chlorinated hydrocarbons like trichloroethylene (TCE) is of emerging demand because these species are important environmental pollutants. Continuous flow analysis of noncombusted TCE molecules, either by gas chromatograph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c379cd5150d2e529d978bd1d6f45d40e
https://pubmed.ncbi.nlm.nih.gov/21851081

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