TY - CONF A1 - Bonnerot, Olivier A1 - Bosch, S. A1 - Rabin, Ira A1 - Hahn, Oliver T1 - Scientific service project Z02 at the CSMC: Material-science methods of reconstructing the history of manuscripts N2 - Z02 is one of the three technically supporting projects at the CSMC. In collaboration with Z01 and Z03, it aims at bridging the gap between humanities and natural sciences and technology. To that purpose, we set up a laboratory with a range of high-end instruments, most of them mobile, allowing thorough non-destructive analysis of manuscripts. In addition to working on constantly improving the laboratory and the methods of analysis, a substantial part of our activities is dedicated to service, by supporting different research projects conducted at the center. In this talk, we will present our equipment and the possibilities offered by the different techniques available regarding the different kinds of missions: typology and classification of inks, provenance studies, recovery of faded inscriptions and palimpsests, reconstruction of the history of manuscripts, authentication and dating. We will give a brief overview of our past and ongoing activities in the frame of the second phase of the CSMC. Finally, a selection of three projects will be presented in greater detail to highlight the possibilities of our laboratory and the diversity of missions which can be carried out: - Support of project C08 on East Frankish manuscripts containing collections of formulae - Identifying color materials applied in Muhammad Juki's Shahnamah with non-invasive combined methods - Checking for the presence of metals in the Herculaneum papyri T2 - 3rd International Conference on Natural Sciences and Technology in Manuscript Analysis CY - Hamburg, Germany DA - 13.06.2018 KW - CSMC KW - Manuscript KW - Ink KW - Pigment PY - 2018 AN - OPUS4-45504 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bonnerot, Olivier A1 - Bosch, S. A1 - Rabin, Ira A1 - Hahn, Oliver T1 - Scientific service project z02 at the csmc: material-science methods of reconstructing the history of manuscripts N2 - Z02 is one of the three technically supporting projects at the Centre for the Study of Manuscript Cultures (CSMC). In collaboration with the other two service projects, Z01 and Z03, it aims at bridging the gap between humanities and natural sciences and technology. To that purpose, we set up a laboratory with a range of high-end instruments, most of them mobile, allowing thorough non-destructive analysis of manuscripts. In addition to working on constantly improving the laboratory and the methods of analysis, a substantial part of our activities is dedicated to service, by supporting different research projects conducted at the centre. In this talk, we will present our equipment and the possibilities offered by the different techniques available regarding the different kinds of missions: typology and classification of inks, provenance studies, recovery of faded inscriptions and palimpsests, reconstruction of the history of manuscripts, authentication and dating. We will give a brief overview of our past and ongoing activities in the frame of the second phase of the CSMC. Finally, a selection of projects will be presented in greater detail to highlight the possibilities of our laboratory and the diversity of missions which can be carried out. T2 - Konferenz: Art & Archaeology 2018 CY - Jerusalem, Israel DA - 09.12.2018 KW - Manuscripts KW - Inks KW - CSMC KW - Pigments PY - 2018 AN - OPUS4-47039 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bonnerot, Olivier A1 - Del Mastro, G. A1 - Hammerstaedt, J. A1 - Mocella, V. A1 - Rabin, Ira T1 - XRF ink analysis of selected fragments from the Herculaneum collection N2 - Hundreds of papyrus rolls, carbonized during the 79CE eruption of Mount Vesuvius, were discovered in 1754 at Herculaneum. Sophisticated mechanical methods for unrolling the best-preserved scrolls have been applied, with varying success. However, such processes have been abandoned, to prevent risk from irremediable damage or loss and to preserve the integrity of the extremely fragile rolls. Following the development of X-ray based non-invasive techniques, attempts to virtually unroll the scrolls were made. The most common ink in Antiquity was carbon-based, and the main element of carbonized papyrus is carbon, making these investigations difficult. However, some attempts with synchrotron X-ray phase-contrast tomography (XPCT) were successful. Recently, the identification of antique inks containing metals raised hope that if some of the inks contain metal the rolls can be virtually unrolled using conventional CT- technique. We are presenting here the first results of a preliminary analysis, which aimed at identifying scrolls whose ink contains metals. T2 - Konferenz: 29th International Congress of Papyrology CY - Lecce, Italy DA - 28.07.2019 KW - Herculaneum KW - Papyrus KW - Tomography KW - XRF KW - Ink PY - 2019 AN - OPUS4-48615 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bonnerot, Olivier A1 - Bosch, S. A1 - Rabin, Ira A1 - Hahn, Oliver T1 - Scientific service project z02 at the CSMC: material science methods of reconstructing the history of manuscripts N2 - Z02 is one of the three technically supporting projects at the Centre for the Study of Manuscript Cultures (CSMC). In collaboration with the other two service projects, Z01 and Z03, it aims at bridging the gap between humanities and natural sciences and technology. To that purpose, we set up a laboratory with a range of high-end instruments, most of them mobile, allowing thorough non-destructive analysis of manuscripts. In addition to working on constantly improving the laboratory and the methods of analysis, a substantial part of our activities is dedicated to service, by supporting different research projects conducted at the centre. In this talk, we will present our equipment and the possibilities offered by the different techniques available regarding the different kinds of missions: typology and classification of inks, provenance studies, recovery of faded inscriptions and palimpsests, reconstruction of the history of manuscripts, authentication and dating. We will give a brief overview of our past and ongoing activities in the frame of the second phase of the CSMC. Finally, a selection of three projects will be presented in greater detail to highlight the possibilities of our laboratory and the diversity of missions which can be carried out. T2 - International Medieval Conference CY - Leeds, United Kingdom DA - 01.07.2019 KW - Manuscript KW - Ink KW - Pigment PY - 2019 AN - OPUS4-48465 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Blotevogel, J. A1 - Lu, W. A1 - Rappé, A. A1 - Kennedy, E. A1 - Stockenhuber, M. A1 - Weber, N. A1 - Lucas, J. A1 - Vogel, Christian A1 - Simon, Franz-Georg A1 - Holm, O. T1 - Thermal Destruction of PFAS N2 - Thermal treatment processes are currently the only full-scale option for thedestruction of per- and polyfluoroalkyl substances (PFAS) in large waste streams. While all organic molecules including PFAS are susceptible to thermal destruction, their decomposition rates are controlled by process variables such as temperature, reaction atmosphere, and residence time. Concerns exist about the formation of products of incomplete destruction and their emission from hazardous waste incinerators. This talk will summarize the current stateof-the-art of thermal PFAS destruction, identify research needs, and showcase future research designed to address critical knowledge gaps. T2 - Department of Defense's (DoD) Energy and Environment Innovation Symposium CY - Washington DC, USA DA - 28.11.2023 KW - Thermal treatment KW - Per- and Polyfluoroalkyl substances (PFAS) KW - Remediation PY - 2023 AN - OPUS4-58974 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Birke, V. A1 - Fischer, M. A1 - Mamat, B. A1 - Egloffstein, T. A1 - Simon, Franz-Georg T1 - Innovation Network PerFluSan N2 - Per und polyfluorierte Alkylsubstanzen (PFAS) werden im Rahmen ihres breiten industriellen Einsatzes in die Umwelt ein­gebracht, wo sie aufgrund ihrer kritischen Eigen­schaften ein Problem darstellen. Der nach­haltige Schutz von Mensch und Umwelt vor dieser Stoff­gruppe ist eine wichtige Zukunfts­­aufgabe. Verfügbare PFAS-Reinigungs- und -Sanierungs­verfahren sind jedoch teuer und oftmals unzul­änglich. PerFluSan möchte einen entscheidenden Beitrag zur Lösung dieses Problems leisten, indem hier neue PFAS-Sanierungs­verfahren für Böden und Wässer, sowie innovative analytische Methoden zum PFAS-Nachweis entwickelt werden. Die lang­fristige Vision ist es, PerFluSan zu einer nationalen Anlauf­stelle der PFAS-Thematik auszubauen, die mit Hilfe der Synergien zwischen den PerFluSan-Akteuren alle Aspekte der Problematik ganz­heitlich, nachhaltig und effektiv adressiert. N2 - Per- and polyfluorinated alkyl substances (PFAS) are transferred into the environment as part of their broad industrial use, where they pose a problem due to their critical properties. The sustainable protection of people and the environment from this group of substances is an important task for the future. However, available PFAS removal and remediation processes are expensive and often inadequate. PerFluSan would like to make a relevant contribution to solve this problem by developing new PFAS remediation methods for soils and water, as well as innovative analytical methods for PFAS detection. The long-term vision is to develop PerFluSan into a national contact point for the PFAS topic, which uses synergies between the PerFluSan actors to address all aspects of the problem holistically, sustainably and effectively. T2 - International Online – Conference PFAS - Dealing with contaminants of emerging concern CY - Online meeting DA - 30.11.2020 KW - Perfluorierte Verbindungen KW - Sanierung KW - PFAS PY - 2020 AN - OPUS4-51700 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bell, Jérémy A1 - Climent, Estela A1 - Gotor, Raúl A1 - Tobias, Charlie A1 - Martin-Sanchez, Pedro M. A1 - Rurack, Knut T1 - Dipstick coated with polystyrene-silica core-shell particles for the detection of microbiological fuel contamination N2 - Microbial contamination of fuels by fungi or bacteria poses risks such as corrosion and fuel system fouling, which can lead to critical problems in refineries and distribution systems and has a significant economic impact at every stage of the process. Many factors have been cited as being responsible for microbial growth, like the presence of water in the storage tanks. In fact, only 1 % water in a storage system is sufficient for the growth of microorganisms like bacteria or yeasts, as well as for the development of fungal biomass at the oil/water interface. This work presents a rapid test for the accurate determination of genomic DNA from aqueous fuel extracts. The detection is based on the use of polystyrene-mesoporous silica core-shell particles onto which modified fluorescent molecular beacons are covalently grafted. These beacons contain in the hairpin loop a target sequence highly conserved in all bacteria, corresponding to a fragment of the 16S ribosomal RNA subunit. The designed single-stranded molecular beacon contained fluorescein as an internal indicator and a quencher in its proximity when not hybridized. Upon hybridization in presence of the target sequence, the indicator and the quencher are spatially separated, resulting in fluorescence enhancement. To perform the assay the developed particles were deposited on different glass fibre strips to obtain a portable and sensitive rapid test. The assays showed that the presence of genomic DNA extracts from bacteria down to 50–70 μg L–1 induced a fluorescence response. The optical read-out was adapted for on-site monitoring by fitting a 3D-printed case to a conventional smartphone, taking advantages of the sensitivity of the CMOS detector. Such embedded assembly enabled the detection of genomic DNA in aqueous extracts down to the mg L–1 range and represents an interesting step toward on-site monitoring of fuel contamination. T2 - IMA 2023 CY - Chania, Greece DA - 18.09.2023 KW - Teststreifen KW - Test strip KW - Microbial KW - Mikrobiell KW - Smartphone KW - Particles KW - Partikeln PY - 2023 AN - OPUS4-58526 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartelmeß, Jürgen A1 - Gawlitza, Kornelia A1 - Kraus, Werner A1 - Chlvi-Iborra, Katherine A1 - Tiebe, Carlo A1 - Noske, Reinhard A1 - Bartholmai, Matthias A1 - Rurack, Knut T1 - Developments Towards a BODIPY-based fluorometric sensing device for multiple hazardous gases N2 - Fluorometric sensing is a versatile approach for trace analysis outside of the laboratory, requiring suitable sensor materials and their integration into sensing devices. The versatility of fluorophores as probes, especially in terms of the possibility to tailor their optical as well as their recognition properties by synthetic modifications in a wide range, renders them as superior active component for the preparation of optical sensing devices. Recent works at BAM in this field include, for example, the detection of nerve gas agents, illustrating impressively the aforementioned benefits of fluorophores in optical sensing applications. In the interdisciplinary project presented here, we target hazardous gases such as ammonia, benzene, and hydrogen sulfide, next to others, which pose a major threat to human health and environmental safety and for which the availability of a sensitive and reliable detection method is highly desirable. The dyes presented follow a “turn-on” fluorescence schematic, which allows for the selective and sensitive detection of the respective gaseous analyte. The immobilization of the probe in polymeric matrices is then the next step toward the fabrication of a prototype device for molecular sensing. Further steps in the project include the assembly of instruments for test-atmosphere generation, the referencing of the sensor system, development and implementation of an optical setup, and the testing of the prototype device under laboratory conditions and in the field. In this presentation, we give an overview over the recent developments on this topic in our groups. Highlights are hydrogen sulfide sensitive, BODIPY based transition metal complexes, which allow for a sensitive as well as selective detection of the toxic gas. In addition, we present a novel class of highly substituted BODIPY derivatives – pocket-BODIPYs – which are of a synthetically high versatility and can readily be modified to create pockets in the periphery of the molecule of defined geometries. This is illustrated on the successful encapsulation of benzene by a pocket-BODIPY derivative, confirmed by X-ray crystallographic analysis as well as by further spectroscopic and analytical methods. T2 - International Conference on Porphyrins and Phthalocyanins (ICPP-10) CY - Munich, Germany DA - 01.07.2018 KW - BODIPY dye KW - Fluorometric sensing KW - Gas sensing PY - 2018 AN - OPUS4-45646 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bandow, Nicole T1 - Consideration of organic contaminants and ecotoxicologal impact of recycling materials - Handling of substances without treshold values N2 - The presentation gives an overview about the use of ecotoxicity testing in assessment of waste. Especially in cases with unknown composition this kind of test are useful. Recently, the assessment of the hazard property HP 14 "ecotoxicity" for the labelling of waste was published. The labelling procedure is explained in detail. T2 - Travelling Conference CY - Perth, Australia DA - 06.02.2018 KW - Ecotoxicity KW - HP14 KW - Recycling materials PY - 2018 AN - OPUS4-44456 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bandow, Nicole T1 - Consideration of organic contaminants and ecotoxicologal impact of recycling materials - Handling of substances without treshold values N2 - The presentation gives an overview about the use of ecotoxicity testing in assessment of waste. Especially in cases with unknown composition this kind of test are useful. Recently, the assessment of the hazard property HP 14 "ecotoxicity" for the labelling of waste was published. The labelling procedure is explained in detail. T2 - Travelling Conference CY - Seoul, Korea DA - 29.01.2018 KW - Ecotoxicity KW - Recycling materials KW - HP14 PY - 2018 AN - OPUS4-44454 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bandow, Nicole T1 - Consideration of organic contaminants and ecotoxicologal impact of recycling materials - Handling of substances without treshold values N2 - The presentation gives an overview about the use of ecotoxicity testing in assessment of waste. Especially in cases with unknown composition this kind of test are useful. Recently, the assessment of the hazard property HP 14 "ecotoxicity" for the labelling of waste was published. The labelling procedure is explained in detail. T2 - Travelling Conference CY - Ho-Chi-Ming City, Vietnam DA - 01.02.2018 KW - Ecotoxicity KW - HP14 KW - Recycling materials PY - 2018 AN - OPUS4-44455 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bandow, Nicole A1 - Schoknecht, Ute T1 - Auswaschung aus Wärmedämmverbundsystemen N2 - Ausgewählte Ergebnisse des UBA-Vorhabens "Beregnete Bauteile und Bauprodukte: Entwicklungen für Vergabegrundlagen für den Blauen Engel mit Hilfe von Auslaugtest" werden für organische und anorganische Analyten präsentiert. Ein Schwerpunkt ist den Einfluss der verschiedenen Schichten von WDVS-Systemen aufzuzeigen. T2 - UBA Fachgespräch "Umwelteigenschaften von Bauprodukten: 'Schnellbewitterung, Leaching, Modellierung CY - Valley, Germany DA - 17.04.2018 KW - Auswaschung KW - DSLT KW - Tauchtest KW - Wärmedämmverbundsystem PY - 2018 AN - OPUS4-44720 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Aumont, Cedric A1 - McMahon, Dino Peter T1 - Harnessing near-chromosome level quality genomes to explore the evolution of termite immunity N2 - The phylogeny of the Blattodea boasts a wide degree of sociality spanning from solitary cockroaches to advanced ecosystem-dominating higher termite societies. The emergence of sociality in termites was associated with the acquisition of a diverse range of social structures. Previous work has found evidence for a caste-specific social defence system in termites leading to an immune system that may favour group over individual defence. While preliminary work suggests a correlation between social transitions and a reduction of immune gene family diversity, the lack of available high-quality termite genomes hampers complete knowledge of the true diversity of immune gene evolution across termite phylogeny. Here, we report on the sequencing and near-chromosome level assembly of 48 high-quality long-read-based genomes across major termite and cockroach sister-branch lineages. We investigate the diversity and evolutionary history of immune genes across genomes, focusing particular attention on correlations between immune gene evolution and transitions in sociality over termite phylogeny. T2 - Royal Entomological Society Annual Meeting - Ento23 CY - University of Exeter, Falmouth, UK DA - 05.09.2023 KW - Immune gene family KW - Termite phylogeny KW - Eusociality KW - Group defence PY - 2023 AN - OPUS4-58296 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Aumont, Cedric A1 - McMahon, Dino Peter T1 - Immune gene family diversity across insects and Blattodea N2 - Insecta is one of the most diverse phyla in the animal kingdom, with species living in all types of habitats encountering an even greater diversity of pathogens and parasites. Defence strategies against such harmful threats led to a variety of molecular mechanisms, ecological shifts, and genetic innovations. Gene families underlying the molecular basis of the immune responses have evolved within the boundaries given by the species ecology. Here, we explore the evolution of some emblematic immune gene families throughout the Insecta phylum shedding light on remarkable genetic events such as gene duplication or gene loss. We followed a workflow based on the Hidden Markov model to search for immune genes in 55 high-quality genomes of insects. We highlight the emergence of group defence in social species as an ecological shift that released selection pressure on immune gene families notably in Blattodea. Further, we draw attention to certain gene families and the link between their diversity and the specificities of the species’ microbiota. Overall, we report data on immune gene diversity in insects. T2 - International Conference for Blattodea Research CY - Münster, Germany DA - 03.04.2023 KW - Immune gene family KW - Genomics KW - Blattodea PY - 2023 AN - OPUS4-58298 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Aumont, Cedric A1 - McMahon, Dino Peter T1 - Genomic innovations underlying the evolution of termite social behaviour N2 - The phylogeny of the Blattodea boasts a wide degree of sociality spanning from solitary cockroaches to advanced ecosystem-dominating higher termite societies. The emergence of sociality in the termites was associated with the acquisition of a diverse range of social structures and differential expression of specific gene network. Previous work has found evidence for a caste-specific social defence system in termites leading to an immune system that may favour group over individual defence. While preliminary work suggests a correlation between social transitions and a reduction of immune gene family diversity, the lack of available high-quality termite genomes hampers complete knowledge of the true diversity of immune gene evolution across termite phylogeny. Here, we report on the sequencing and assembly of 50 high-quality long-read-based genomes and 180 caste- and sex-specific brain transcriptomes across major termite and cockroach sister-branch lineage. We investigate the diversity and evolutionary history of immune genes across genomes, and the potential gene networks that have evolved with the emergence of termite sociality and some aspect of immune related behaviours. T2 - Invited talk at University Paris 13 CY - Villetaneuse, France DA - 27.02.2023 KW - Immune gene family KW - Gene network KW - Eusociality KW - Termite phylogeny KW - Group defence PY - 2023 AN - OPUS4-58300 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - An, Biwen Annie A1 - Koerdt, Andrea A1 - Özcan Sandikcioglu, Özlem A1 - Schreiber, Frank A1 - Kleinbub, Sherin T1 - The study of methanogen-induced microbiologically influenced corrosion under flow conditions N2 - Microbiologically influenced corrosion (MIC) is an expensive but unpredictable problem for the industries. The most well-known culprit for MIC is the sulfate-reducing microorganisms (SRM), such as members from the genus Desulfovibrio. It has been widely accepted that SRM can contribute significantly to MIC through the production of hydrogen sulfide (HS-) or in some cases a direct electron uptake from the metal surface. However, in a real environmental system, SRM is not exclusive and often involved with other microorganisms that may also contribute to MIC, such as methanogens. Methanogenic archaea can produce methane (CH4) using H2+CO2, formate, methylated amines or acetate. Methanogens are highly abundant in the environment and many are found in very extreme conditions, such as high temperature and high salinity. Previous researches have demonstrated that methanogens are capable of MIC, though the specific mechanisms are still under investigation. In the oil and gas industry, methanogens are not considered as the main contributor for MIC since the corrosion rates are often too low. However, the tests for methanogen-induced MIC are usually performed at static conditions, which cannot represent the system accurately. Here, we developed a novel anaerobic system to evaluate the corrosion potential of methanogens under flow conditions. We will use the Methanococcus maripaludis KA1 strain, which was isolated from a crude oil tank, as the organism of interest. A separate system for Desulfovibrio alaskensis will be established for corrosion rate comparisons. Furthermore, we will study the synergistic effects of M. maripaludis and D. alaskensis on MIC under flow. T2 - Eurocorr 2018 CY - Krakow, Poland DA - 09.09.2018 KW - Mikrobiell beeinflusste Korrosion KW - Methanogen KW - Korrosion KW - Microbiologically influenced corrosion KW - Methanogenesis KW - Flow system KW - Model PY - 2018 AN - OPUS4-46012 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - An, Biwen Annie A1 - Koerdt, Andrea A1 - Brüggemann, Kristin A1 - Wurzler, Nina A1 - Kleinbub, Sherin A1 - Özcan Sandikcioglu, Özlem T1 - Effect of biocides on highly corrosive methanogenic Archaea N2 - Biocide mitigation strategies of microbiologically influenced corrosion (MIC) in the oil and gas industry have been primarily used to eliminate the growths of sulfate-reducing microorganisms (SRM). However, methanogenic Archaea (MA) can also be highly corrosive by using iron as an electron source for methanogenesis. Because of the fundamental physiological differences between archaea and bacteria, responses of MA towards SRM-specific biocides cannot be deduced using SRM. Due to the lack of information available on the effect of biocides on corrosive MA, we selected THPS, glutaraldehyde, nitrate and perchlorate to compare against corrosive SRM. Preliminary results showed that at low concentrations of THPS (0-10 ppm), growth of MA was not affected, methane production and corrosion rates (0.1 mm/yr) were comparable between the different THPS concentrations. On the contrary, the SRM strain showed decreased corrosion rates (0.18 mm/yr to 0.03 mm/yr) with increasing THPS concentrations. Further corrosion tests including electrochemical measurements of different biocides on the growth of MA and SRM will be conducted. Such knowledge not only provide important insights on the physiological response of MA to biocides but also contribute to more effective mitigation strategies that can be both economic and environmentally beneficial. T2 - 25th Annual Reservoir Microbiology Forum CY - London, UK DA - 20.11.2019 KW - Corrosion KW - Methanogen KW - Microorganism KW - Biocide PY - 2019 AN - OPUS4-49788 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - An, Annie Biwen A1 - Deland, Eric A1 - Kleinbub, Sherin A1 - Koerdt, Andrea T1 - Standardization of MIC laboratory testing: with a special focus on corrosive methanogens N2 - Microbiologically influenced corrosion (MIC) is a highly unpredictable process involving a complex group of microorganisms, including sulfate-reducing bacteria and methanogens. Standard laboratory MIC testing using static serum bottle enrichments is an easy but limited method, offering poor resolution on the biomineralization process of corrosion products. An example of this is the presumed corrosion product siderite by corrosive methanogens (Mi-MIC). Previous publications reported siderite was the sole corrosion product of M. maripaludis using metal coupons incubated under stationary conditions. However, the formation of siderite is closely related to the surrounding environmental conditions, i.e. pH, CO2 concentration, flow and temperature. Thus, siderite as the sole corrosion product of Mi-MIC remain inconclusive and questionable. To study Mi-MIC effectively, a novel versatile multiport flow-column corrosion monitoring system (MFC) was developed. MFC allows sectional corrosion rate determination under flow conditions using different types of material, inoculum and packing material. MFC offers great flexibility, ease of operation and accurate corrosion measurements that can be combined with many other techniques. Using MFC, we studied multiple strains of methanogens and compared it with sulfate-reducing bacteria under neutral and low pH conditions. It was revealed by MFC that corrosive methanogens have equally high corrosion potential as sulfate-reducing bacteria. Additionally, siderite is not the dominant nor sole corrosion product of Mi-MIC. Thus, effective corrosion monitoring and establishing standard laboratory practices, i.e. incorporating MFC as part of regular testing process, will provide deeper understanding of MIC. This will allow further microbial electrophysiology understandings, contributing to effective mitigation strategy development. T2 - EUROPEAN MIC NETWORK WEBINAR CY - Online meeting DA - 19.05.2020 KW - MIC KW - Methanogen KW - FIB/SEM KW - Corrosion products KW - Microbiologically influenced corrosion KW - Flow Model KW - Modelling KW - Korrosion PY - 2020 AN - OPUS4-51554 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Altenburg, Simon A1 - Mohr, Gunther A1 - Baesso, Ilaria A1 - Straße, Anne A1 - Pittner, Andreas A1 - Pignatelli, Giuseppe A1 - Seeger, Stefan A1 - Nazarzadehmoafi, Maryam A1 - Ehlers, Henrik A1 - Gohlke, Dirk A1 - Homann, Tobias A1 - Scheuschner, Nils A1 - Ulbricht, Alexander A1 - Heinrich, P. A1 - Maierhofer, Christiane T1 - Process monitoring of additive manufacturing of metals - an overview of the project ProMoAM N2 - The project ProMoAM is presented. The goal of the project is to evaluate which NDT techniques or combination of techniques is suited for in-situ quality assurance in additive manufacturing of metals. To this end, also 3d-data fusion and visualization techniques are applied. Additional ex-situ NDT-techniques are used as references for defect detection and quantification. Feasability studies for NDT-techniques that are presently not applicable for in-situ use are performed as well. The presentation gives a brief overview of the whole project and the different involved NDT-techniques. T2 - Workshop od Additive Manufacturing: Process, materials, simulation & implants CY - Berlin, Germany DA - 13.05.2019 KW - Additive manufacturing KW - Process monitoring KW - NDT PY - 2019 AN - OPUS4-48087 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Adamczyk, Burkart A1 - Schraut, Katharina A1 - Adam, Christian T1 - Nachbehandlung von Stahlwerksschlacke und deren Verwertung als Klinkermaterial N2 - LD-Schlacken weisen eine große chemische Ähnlichkeit zu Protlandzementklinker auf. Sie enthalten jedoch noch bis zu 30% Eisen, das mineralisch in oxidischer Form gebunden vorliegt. Dadurch kann sich bei der Erstarrung die wichtigste Klinkerphase "Alit" nicht ausbilden. Durch eine reduzierende Schmelzbehandlung der Schlacke kann des mineralisch gebundene Eisen als Metall separiert werden. Dadurch wird auch die Mineralogie der Schlacke so verändert, dass auch sie nun praktisch einem Portlandzementklinker entspricht. Entsprechende Versuche wurden am kleintechnischen Lichtbogenofen der BAM durchgeführt. Es werden Ergebnisse vorgestellt und auf Grenzen und Möglichkeiten eines derartigen Prozesses im Hinblick auf eine industrielle Umsetzung eingegangen. T2 - Berliner Konferenz "Mineralische Nebenprodukte und Abfälle" CY - Berlin, Germany DA - 11.06.2018 KW - LD-Schlacke KW - Lichtbogenofen KW - Zementklinker PY - 2018 AN - OPUS4-45221 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -