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Vaksmaa A, Vielfaure H, Polerecky L, Kienhuis MVM, van der Meer MTJ, Pflüger T, Egger M, Niemann H. Biodegradation of polyethylene by the marine fungus Parengyodontium album. Sci Total Environ 2024; 934:172819. [PMID: 38679106 DOI: 10.1016/j.scitotenv.2024.172819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Plastic pollution in the marine realm is a severe environmental problem. Nevertheless, plastic may also serve as a potential carbon and energy source for microbes, yet the contribution of marine microbes, especially marine fungi to plastic degradation is not well constrained. We isolated the fungus Parengyodontium album from floating plastic debris in the North Pacific Subtropical Gyre and measured fungal-mediated mineralization rates (conversion to CO2) of polyethylene (PE) by applying stable isotope probing assays with 13C-PE over 9 days of incubation. When the PE was pretreated with UV light, the biodegradation rate of the initially added PE was 0.044 %/day. Furthermore, we traced the incorporation of PE-derived 13C carbon into P. album biomass using nanoSIMS and fatty acid analysis. Despite the high mineralization rate of the UV-treated 13C-PE, incorporation of PE-derived 13C into fungal cells was minor, and 13C incorporation was not detectable for the non-treated PE. Together, our results reveal the potential of P. album to degrade PE in the marine environment and to mineralize it to CO2. However, the initial photodegradation of PE is crucial for P. album to metabolize the PE-derived carbon.
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Affiliation(s)
- A Vaksmaa
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, the Netherlands.
| | - H Vielfaure
- Université de Paris, INSERM U1284, Center for Research and Interdisciplinarity (CRI), Paris, France
| | - L Polerecky
- Department of Earth Sciences, Faculty of Geosciences, Utrecht University, the Netherlands
| | - M V M Kienhuis
- Department of Earth Sciences, Faculty of Geosciences, Utrecht University, the Netherlands
| | - M T J van der Meer
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, the Netherlands
| | - T Pflüger
- Department of Plant and Environmental Sciences, University of Copenhagen, Denmark
| | - M Egger
- The Ocean Cleanup, Rotterdam, the Netherlands; Egger Research and Consulting, St. Gallen, Switzerland
| | - H Niemann
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, the Netherlands; Department of Earth Sciences, Faculty of Geosciences, Utrecht University, the Netherlands
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Ren X, Pflüger T, Weyland M, Baek WY, Rabus H, Ullrich J, Dorn A. High-resolution (e, 2e + ion) study of electron-impact ionization and fragmentation of methane. J Chem Phys 2015; 142:174313. [DOI: 10.1063/1.4919691] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ren X, Pflüger T, Weyland M, Baek WY, Rabus H, Ullrich J, Dorn A. An (e, 2e + ion) study of low-energy electron-impact ionization and fragmentation of tetrahydrofuran with high mass and energy resolutions. J Chem Phys 2014; 141:134314. [DOI: 10.1063/1.4896614] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Xu S, Ma X, Ren X, Senftleben A, Pflüger T, Yan S, Zhang P, Yang J, Ullrich J, Dorn A. Publisher's Note: “An ( e, 2 e + ion) investigation of dissociative ionization of methane” [J. Chem. Phys. 138, 134307 (2013)]. J Chem Phys 2013. [DOI: 10.1063/1.4804169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pflüger T, Zatsarinny O, Bartschat K, Senftleben A, Ren X, Ullrich J, Dorn A. Electron-impact ionization of neon at low projectile energy: an internormalized experiment and theory for a complex target. Phys Rev Lett 2013; 110:153202. [PMID: 25167263 DOI: 10.1103/physrevlett.110.153202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Indexed: 06/03/2023]
Abstract
As a fundamental test for state-of-the-art theoretical approaches, we have studied the single ionization (2p) of neon at a projectile energy of 100 eV. The experimental data were acquired using an advanced reaction microscope that benefits from high efficiency and a large solid-angle acceptance of almost 4π. We put special emphasis on the ability to measure internormalized triple-differential cross sections over a large part of the phase space. The data are compared to predictions from a second-order hybrid distorted-wave plus R-matrix model and a fully nonperturbative B-spline R-matrix (BSR) with pseudostates approach. For a target of this complexity and the low-energy regime, unprecedented agreement between experiment and the BSR model is found. This represents a significant step forward in the investigation of complex targets.
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Affiliation(s)
- Thomas Pflüger
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Oleg Zatsarinny
- Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311, USA
| | - Klaus Bartschat
- Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311, USA
| | - Arne Senftleben
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Xueguang Ren
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Joachim Ullrich
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Alexander Dorn
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
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Xu S, Ma X, Ren X, Senftleben A, Pflüger T, Yan S, Zhang P, Yang J, Ullrich J, Dorn A. An (e, 2e + ion) investigation of dissociative ionization of methane. J Chem Phys 2013; 138:134307. [DOI: 10.1063/1.4798931] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ren X, Pflüger T, Xu S, Colgan J, Pindzola MS, Senftleben A, Ullrich J, Dorn A. Strong molecular alignment dependence of H2 electron impact ionization dynamics. Phys Rev Lett 2012; 109:123202. [PMID: 23005945 DOI: 10.1103/physrevlett.109.123202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Indexed: 06/01/2023]
Abstract
Low-energy (E(0) = 54 eV) electron impact single ionization of molecular hydrogen (H(2)) has been investigated as a function of molecular alignment in order to benchmark recent theoretical predictions [Colgan et al., Phys. Rev. Lett. 101, 233201 (2008) and Al-Hagan et al., Nature Phys. 5, 59 (2009)]. In contrast to any previous work, we observe distinct alignment dependence of the (e,2e) cross sections in the perpendicular plane in good overall agreement with results from time-dependent close-coupling calculations. The cross section behavior can be consistently explained by a rescattering of the ejected electron in the molecular potential resulting in an effective focusing along the molecular axis.
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Affiliation(s)
- X Ren
- Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany
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Xu S, Chaluvadi H, Ren X, Pflüger T, Senftleben A, Ning CG, Yan S, Zhang P, Yang J, Ma X, Ullrich J, Madison DH, Dorn A. Low energy (e, 2e) study from the 1t2 orbital of CH4. J Chem Phys 2012; 137:024301. [DOI: 10.1063/1.4732539] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pflüger T, Senftleben A, Ren X, Dorn A, Ullrich J. Observation of multiple scattering in (e, 2e) experiments on small argon clusters. Phys Rev Lett 2011; 107:223201. [PMID: 22182026 DOI: 10.1103/physrevlett.107.223201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Indexed: 05/31/2023]
Abstract
A kinematically complete experiment for 100 eV electron-impact ionization of small argon clusters was realized. The triple coincidence detection of both outgoing electrons and the residual ion allows the discrimination between single ionization of atoms, dimers and non-mass-selected small clusters as well as between ionization and excitation within the same cluster. Comparison of fully and partly differential ionization cross sections for clusters with those of atoms reveal clear signatures of multiple-scattering reactions. For ionization with excitation, an almost isotropic electron emission pattern is observed.
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Affiliation(s)
- Thomas Pflüger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
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Durá J, Grün A, Bates PK, Teichmann SM, Ergler T, Senftleben A, Pflüger T, Schröter CD, Moshammer R, Ullrich J, Jaroń-Becker A, Becker A, Biegert J. Wavelength Dependence of the Suppressed Ionization of Molecules in Strong Laser Fields. J Phys Chem A 2011; 116:2662-8. [DOI: 10.1021/jp207257j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Durá
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - A. Grün
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - P. K. Bates
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - S. M. Teichmann
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - T. Ergler
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - A. Senftleben
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T. Pflüger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C. D. Schröter
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R. Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J. Ullrich
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - A. Jaroń-Becker
- JILA and Department of Physics, University of Colorado, UCB 440, Boulder 80309-0440, United States
| | - A. Becker
- JILA and Department of Physics, University of Colorado, UCB 440, Boulder 80309-0440, United States
| | - J. Biegert
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
- ICREA-Institucio Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
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Pflüger T, Schmid I, Coppenrath E, Weiss M. Modern nuclear medicine evaluation of neuroblastoma. Q J Nucl Med Mol Imaging 2010; 54:389-400. [PMID: 20823807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The neuroblastoma is an embryonic tumor of the peripheral sympathetic nervous system, and is metastatic or otherwise high risk for relapse in nearly 50% of cases, with a long-term survival of <40%. Therefore, exact staging with radiological and nuclear medicine imaging methods is crucial for finding the adequate therapeutic choice. The tumor cells express the norepinephrine transporter, which makes metaiodobenzylguanidine (MIBG), an analogue of norepinephrine, an ideal tumor specific agent for imaging. On the other hand, MIBG imaging has several disadvantages as limited spatial resolution, limited sensitivity in small lesions, need for two or even more acquisition sessions, and a delay between the start of the examination and result. Most of these limitations can be overcome with positron emission tomography (PET) using different radiotracers. Furthermore, MIBG imaging is not sufficient for operative or biopsy planning. With this regard, a combination with morphological imaging methods is indispensable. This article will discuss the therapeutic strategy for primary and follow-up diagnosis in neuroblastoma using different nuclear medicine and radiological imaging methods as well as multimodality imaging.
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Affiliation(s)
- T Pflüger
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany.
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Senftleben A, Al-Hagan O, Pflüger T, Ren X, Madison D, Dorn A, Ullrich J. Fivefold differential cross sections for ground-state ionization of aligned H(2) by electron impact. J Chem Phys 2010; 133:044302. [PMID: 20687645 DOI: 10.1063/1.3457155] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We discuss the ionization of aligned hydrogen molecules into their ionic ground state by 200 eV electrons. Using a reaction microscope, the complete electron scattering kinematics is imaged over a large solid angle. Simultaneously, the molecular alignment is derived from postcollision dissociation of the residual ion. It is found that the ionization cross section is maximized for small angles between the internuclear axis and the momentum transfer. Fivefold differential cross sections (5DCSs) reveal subtle differences in the scattering process for the distinct alignments. We compare our observations with theoretical 5DCSs obtained with an adapted molecular three-body distorted wave model that reproduces most of the results, although discrepancies remain.
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Affiliation(s)
- Arne Senftleben
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
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Ren X, Senftleben A, Pflüger T, Holzwarth M, Dorn A, Bartschat K, Bray I, Fursa DV, Colgan J, Pindzola MS, Al-Hagan O, Madison DH, Ullrich J. Three-dimensional cross sections for electron impact ionization of atoms and molecules. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/212/1/012003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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