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Hartmann FSF, Weiß T, Kastberg LLB, Workman CT, Seibold GM. Precise and versatile microplate reader-based analyses of biosensor signals from arrayed microbial colonies. Front Microbiol 2023; 14:1187228. [PMID: 37389345 PMCID: PMC10303141 DOI: 10.3389/fmicb.2023.1187228] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/23/2023] [Indexed: 07/01/2023] Open
Abstract
Genetically encoded fluorescent biosensors have emerged as a powerful tool to support phenotypic screenings of microbes. Optical analyses of fluorescent sensor signals from colonies grown on solid media can be challenging as imaging devices need to be equipped with appropriate filters matching the properties of fluorescent biosensors. Toward versatile fluorescence analyses of different types of biosensor signals derived from arrayed colonies, we investigate here the use of monochromator equipped microplate readers as an alternative to imaging approaches. Indeed, for analyses of the LacI-controlled expression of the reporter mCherry in Corynebacterium glutamicum, or promoter activity using GFP as reporter in Saccharomyces cerevisiae, an improved sensitivity and dynamic range was observed for a microplate reader-based analyses compared to their analyses via imaging. The microplate reader allowed us to capture signals of ratiometric fluorescent reporter proteins (FRPs) with a high sensitivity and thereby to further improve the analysis of internal pH via the pH-sensitive FRP mCherryEA in Escherichia coli colonies. Applicability of this novel technique was further demonstrated by assessing redox states in C. glutamicum colonies using the FRP Mrx1-roGFP2. By the use of a microplate reader, oxidative redox shifts were measured in a mutant strain lacking the non-enzymatic antioxidant mycothiol (MSH), indicating its major role for maintaining a reduced redox state also in colonies on agar plates. Taken together, analyses of biosensor signals from microbial colonies using a microplate reader allows comprehensive phenotypic screenings and thus facilitates further development of new strains for metabolic engineering and systems biology.
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Hartmann FSF, Anastasiou I, Weiß T, Shen J, Seibold GM. Impedance flow cytometry for viability analysis of Corynebacterium glutamicum. J Microbiol Methods 2021; 191:106347. [PMID: 34656671 DOI: 10.1016/j.mimet.2021.106347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/15/2022]
Abstract
Corynebacterium glutamicum efficiently produces glutamate when growth is inhibited. Analyses of viability in this non-growing state requires time consuming plating and determination of colony forming units. We here establish impedance flow cytometry measurements to assess the viability of non-growing, glutamate producing C. glutamicum cultures within minutes.
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Affiliation(s)
- Fabian Stefan Franz Hartmann
- Department of Biotechnology and Biomedicine, Section for Synthetic Biology, Technical University of Denmark, Kongens, Lyngby, Denmark
| | - Ioannis Anastasiou
- Department of Biotechnology and Biomedicine, Section for Synthetic Biology, Technical University of Denmark, Kongens, Lyngby, Denmark
| | - Tamara Weiß
- Department of Biotechnology and Biomedicine, Section for Synthetic Biology, Technical University of Denmark, Kongens, Lyngby, Denmark
| | - Jing Shen
- Department of Biotechnology and Biomedicine, Section for Synthetic Biology, Technical University of Denmark, Kongens, Lyngby, Denmark
| | - Gerd Michael Seibold
- Department of Biotechnology and Biomedicine, Section for Synthetic Biology, Technical University of Denmark, Kongens, Lyngby, Denmark.
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Gauttam R, Seibold GM, Mueller P, Weil T, Weiß T, Handrick R, Eikmanns BJ. A simple dual-inducible CRISPR interference system for multiple gene targeting in Corynebacterium glutamicum. Plasmid 2019; 103:25-35. [PMID: 30954454 DOI: 10.1016/j.plasmid.2019.04.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/03/2019] [Accepted: 04/03/2019] [Indexed: 10/27/2022]
Abstract
The development of CRISPR interference (CRISPRi) technology has dramatically increased the pace and the precision of target identification during platform strain development. In order to develop a simple, reliable, and dual-inducible CRISPRi system for the industrially relevant Corynebacterium glutamicum, we combined two different inducible repressor systems in a single plasmid to separately regulate the expression of dCas9 (anhydro-tetracycline-inducible) and a given single guide RNA (IPTG-inducible). The functionality of the resulting vector was demonstrated by targeting the l-arginine biosynthesis pathway in C. glutamicum. By co-expressing dCas9 and a specific single guide RNA targeting the 5'-region of the argininosuccinate lyase gene argH, the specific activity of the target enzyme was down-regulated and in a l-arginine production strain, l-arginine formation was shifted towards citrulline formation. The system was also employed for down-regulation of multiple genes by concatenating sgRNA sequences encoded on one plasmid. Simultaneous down-regulated expression of both argH and the phosphoglucose isomerase gene pgi proved the potential of the system for multiplex targeting. The system can be a promising tool for further pathway engineering in C. glutamicum. Cumulative effects on targeted genes can be rapidly evaluated avoiding tedious and time-consuming traditional gene knockout approaches.
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Affiliation(s)
- Rahul Gauttam
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany
| | - Gerd M Seibold
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany
| | - Phillipp Mueller
- Institute of Applied Biotechnology, Biberach University of Applied Sciences, Biberach, Germany
| | - Tatjana Weil
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany
| | - Tamara Weiß
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany
| | - René Handrick
- Institute of Applied Biotechnology, Biberach University of Applied Sciences, Biberach, Germany
| | - Bernhard J Eikmanns
- Institute of Microbiology and Biotechnology, University of Ulm, Ulm, Germany.
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Knobloch J, Lehnert M, Yanik S, Casjens S, Körber S, Lotz A, Betke L, Raulf M, Zschiesche W, Weiß T, Kronsbein J, Pesch B, Brüning T, Koch A. Modulation der T-Zell- und Monozytenaktivität durch Schweißrauchexposition – Daten aus der Weldox II Studie. Pneumologie 2018. [DOI: 10.1055/s-0037-1619128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- J Knobloch
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil
| | - M Lehnert
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - S Yanik
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil
| | - S Casjens
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - S Körber
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil
| | - A Lotz
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - L Betke
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil
| | - M Raulf
- Bgfa für Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum; Kompetenz-Zentrum Allergologie/Immunologie
| | - W Zschiesche
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - T Weiß
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - J Kronsbein
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil
| | - B Pesch
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - T Brüning
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum
| | - A Koch
- Medizinische Klinik III für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil, Bochum; Klinikum der LMU München; Deutsches Lungenzentrum (Dlz)
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Hovanec J, Behrens T, Arendt M, Weiß T, Brüning T, Jöckel KH. Rauchen und Cotinin nach Sozialstatus und Beruf in der Heinz Nixdorf Recall Studie. Das Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1605647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- J Hovanec
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum, Bochum
| | - T Behrens
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum, Bochum
| | - M Arendt
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Universitätsklinikum Essen, Essen
| | - T Weiß
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum, Bochum
| | - T Brüning
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung, Institut der Ruhr-Universität Bochum, Bochum
| | - KH Jöckel
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Universitätsklinikum Essen, Essen
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Otto-Knapp R, Streubel A, Roth A, Schönfeld N, Weiß T, Rüssmann H, Bauer TT, Mauch H. Molekularbiologische Resistenzbestimmung von Pyrazinamid im Vergleich zu konventionellen Methoden. Pneumologie 2015. [DOI: 10.1055/s-0035-1544807] [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: 10/24/2022]
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Weiß T, Kollmeier J, Blum T, Boch C, Crolow C, Misch D, Thiel S, Rüssmann H, Bauer TT. Laktat-Dehydrogenase, C-reaktives Protein und Leukozytenzahl sind prognostische Parameter bei Patienten mit Kleinzelligem Lungenkarzinom (SCLC) im Stadium IIIa-IV. Pneumologie 2014. [DOI: 10.1055/s-0034-1367983] [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: 10/25/2022]
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Crolow C, Blum TG, Kollmeier J, Griff S, Thiel S, Weiß T, Schönfeld N, Rüssmann H, Bauer TT. Prognostische Bedeutung von Blutbildparametern und histologischem Subtyp beim malignen Pleuramesotheliom. Pneumologie 2014. [DOI: 10.1055/s-0034-1367982] [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: 10/25/2022]
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Misch D, Kollmeier J, Thiel S, Weiß T, Boch C, Theissig F, Mairinger T, Bauer TT. Das hepatoide Adenokarzinom der Lunge: Eine seltene Entität. Pneumologie 2014. [DOI: 10.1055/s-0034-1367960] [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: 10/25/2022]
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Boch C, Kollmeier J, Roth A, Streubel A, Misch D, Weiß T, Mairinger T, Bauer TT. Der prognostische Wert von K-RAS-Mutationen in Abhängigkeit von ihrer Genlokalisation bei Patienten mit fortgeschrittenem, nicht squamösen, nicht kleinzelligen Lungenkarzinom. Pneumologie 2014. [DOI: 10.1055/s-0034-1367984] [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: 10/25/2022]
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Hoffmeyer F, Lehnert M, Gawrych K, Harth V, Lotz A, Merget R, Heinze E, Weiß T, Pesch B, Brüning T. Schweißrauchexposition und COPD bei Schweißern. Ergebnisse aus der WELDOX-Studie. Pneumologie 2014. [DOI: 10.1055/s-0034-1367877] [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: 10/25/2022]
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Lehnert M, Hoffmeyer F, Gawrych K, Lotz A, Heinze E, Berresheim H, Merget R, Harth V, Van Gelder R, Hahn JU, Hartwig A, Weiß T, Pesch B, Brüning T. Effects of Exposure to Welding Fume on Lung Function: Results from the German WELDOX Study. Adv Exp Med Biol 2014; 834:1-13. [PMID: 25315619 DOI: 10.1007/5584_2014_65] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The association between exposure to welding fume and chronic obstructive pulmonary disease (COPD) has been insufficiently clarified. In this study we assessed the influence of exposure to welding fume on lung function parameters. We investigated forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), FEV1/FVC, and expiratory flow rates in 219 welders. We measured current exposure to respirable particles and estimated a worker's lifetime exposure considering welding techniques, working conditions and protective measures at current and former workplaces. Multiple regression models were applied to estimate the influence of exposure to welding fume, age, and smoking on lung function. We additionally investigated the duration of working as a welder and the predominant welding technique. The findings were that age- and smoking-adjusted lung function parameters showed no decline with increasing duration, current exposure level, and lifetime exposure to welding fume. However, 15% of the welders had FEV1/FVC below the lower limit of normal, but we could not substantiate the presence of an association with the measures of exposure. Adverse effects of cigarette smoking were confirmed. In conclusion, the study did not support the notion of a possible detrimental effect of exposure to welding fume on lung function in welders.
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Affiliation(s)
- M Lehnert
- Institute of Prevention and Occupational Medicine, German Social Accident Insurance (IPA), Institute of the Ruhr-University Bochum, 1 Bürkle-de-la-Camp-Platz, 44789, Bochum, Germany,
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Otto-Knapp R, Wagner S, Weiß T, Bös L, Vesenbeckh S, Glaser-Paschke G, Priwitzer M, Schönfeld N, Rüssmann H, Mauch H, Bauer TT. Empfindlichkeit der Zweitrangmedikamente bei Patienten mit MDR Tuberkulose. Monozentrische Ergebnisse von 2008 bis 2012. Pneumologie 2013. [DOI: 10.1055/s-0033-1334557] [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: 10/27/2022]
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Krieger D, Schönfeld N, Gößwald A, Kreiter C, Weiß T, Blum T, Rüssmann H, Mauch H, Bauer TT. Rezidivhäufigkeit bei immunkompetenten Patienten mit atypischer Mykobakteriose - Langzeitergebnisse eines monozentrischen Patientenkollektivs. Pneumologie 2013. [DOI: 10.1055/s-0033-1334518] [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: 10/27/2022]
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Weiß T, Schönfeld N, Otto-Knapp R, Bös L, Bettermann G, Mauch H, Rüssmann H, Bauer TT. In vitro-Empfindlichkeitstestungen für Linezolid bei TB- und MDR-TB-Stämmen aus dem Patientenkollektiv eines regionalen Zentrums. Pneumologie 2013. [DOI: 10.1055/s-0033-1334558] [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: 10/27/2022]
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Crolow C, Samulowski M, Blum T, Kollmeier J, Weiß T, Boch C, Schönfeld N, Grüning W, Bauer TT. Arterielle thromboembolische Komplikationen beim Lungenkarzinom. Pneumologie 2012. [DOI: 10.1055/s-0032-1302860] [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: 10/28/2022]
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Misch D, Kollmeier J, Griff S, Boch C, Weiß T, Grüning W, Blum T, Mairinger T, Bauer TT. Prognostische Wertigkeit der Hyponatriämie bei Erstdiagnose eines kleinzelligen Lungenkarzinoms im Stadium IV. Pneumologie 2012. [DOI: 10.1055/s-0032-1302756] [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: 10/28/2022]
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Weiß T, Schönfeld N, Bergmann T, Mauch H, Blum T, Rüssmann H, Bauer TT. In vitro-Empfindlichkeitstestungen für Moxifloxacin bei verschiedenen nicht-tuberkulösen Mykobakterienspezies. Pneumologie 2012. [DOI: 10.1055/s-0032-1302667] [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: 10/28/2022]
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Gonschorek O, Hauck S, Spiegl U, Weiß T, Pätzold R, Bühren V. O-arm®-based spinal navigation and intraoperative 3D-imaging: first experiences. Eur J Trauma Emerg Surg 2011; 37:99-108. [DOI: 10.1007/s00068-011-0089-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 02/14/2011] [Indexed: 11/29/2022]
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Weiß T, Schönfeld N, Bettermann G, Mauch H, Blum T, Rüssmann H, Bauer TT. Moxifloxacin-Empfindlichkeit in vitro von Mycobacterium bovis. Pneumologie 2011. [DOI: 10.1055/s-0031-1272186] [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: 10/18/2022]
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Hoffmeyer F, Raulf-Heimsoth M, Weiß T, Henry J, Bünger J, Gutwinski E, Bernard S, Brüning T, Harth V. Biomarker im Atemkondensat - Modulation durch Alterung des Kondensors. Pneumologie 2011. [DOI: 10.1055/s-0031-1272026] [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: 10/18/2022]
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Weiß T, Kollmeier J, Misch D, Blum T, Grüning W, Nehls W, Schönfeld N, Bauer TT. Langzeitüberleben beim metastasierten kleinzelligen Lungenkarzinom (SCLC) - Eine chemotherapeutische Herausforderung. Pneumologie 2011. [DOI: 10.1055/s-0031-1272172] [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: 10/18/2022]
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Weiß T, Völkening S, Rüffer T, Meichel E, Sachse H, Rheinwald G, Lang H. Indenyl-Titanchloride: Ethen-Polymerisation und Struktur-Reaktivitäts-Untersuchungen. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700127] [Citation(s) in RCA: 1] [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: 11/10/2022]
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Weiß T. Analyses of Hazardous Substances in Biological Materials Deutsche Forschungsgemeinschaft, Working group “Analytical Chemistry”, Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area (Chairman H. Greim), Volume 7, 2001, Wiley-VCH, Weinheim, New York, Chichester, Brisbane, Singapore, Toronto, ISBN: 3-527-27048-5, 309 pages, 47 figures and 65 tables, Hardcover. Single price: DM 248.00, 126.00 &euro. Subscription price: DM 178.00, 91.01 &euro. Edited by J. Angerer and K.H. Schaller. J Chromatogr B Analyt Technol Biomed Life Sci 2002. [DOI: 10.1016/s0378-4347(01)00503-5] [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: 10/27/2022]
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