Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-21622 Zeitschriftenartikel Appelhans, Dietmar; Oertel, U.; Mazzeo, R.; Komber, H.; Hoffmann, J.; Weidner, Steffen; Brutschy, B.; Voit, B.; Ottaviani, M.F. Dense-shell glycodendrimers: UV/Vis and electron paramagnetic resonance study of metal ion complexation The development of dendritic metal ion carrier systems for use in a biological environment is a challenging task as the carrier system must possess multiple features (e.g. a protective shell for metal decomplexation, targeting functions, metal-intradendrimer complexes, etc.) to substitute for the function of metal proteins in processes such as copper metabolism. Thus, Cu(II) complexation by a series of poly(propyleneimine) glycodendrimers ranging up to the fifth generation that have either a dense maltose or maltotriose shell was investigated by UV/Vis spectroscopy and electron paramagnetic resonance (EPR). As a necessary step towards potential biological application, we elucidated the complexation capacity, location of the Cu(II)-dendrimer complexes and the Cu(II) coordination sphere in the dendritic environment. A generation-dependent Cu(II) complexation was found. Furthermore, analysis of the EPR spectra revealed that internal and external Cu(II) coordination and the symmetry (axial and rhombic) of the generated complexes depend on the oligosaccharide shell, dendrimer generation and the relative concentrations of Cu(II) and the dendrimers. Both axial and rhombic symmetries are generation dependent, but also distort with increasing generation number. External coordination of Cu(II) is supported by sugar groups and water molecules. Finally, a third-generation dendrimer with a maltose shell was used to explore the general complexation behaviour of the dendritic poly(propyleneimine) scaffold towards different metal ions [Cu(II), Ag(I), VO(IV), Ni(II), Eu(III) and UO2(VI)]. London, UK 2010 Proceedings of the Royal Society of London / A 466 1489 1513 10.1098/rspa.2009.0107 2016-02-19 OPUS4-51369 Zeitschriftenartikel Baumann, Maria; Falkenhagen, Jana; Weidner, Steffen; Wold, C.; Uliyanchenko, E. Characterization of copolymers of polycarbonate and polydimethylsiloxane by 2D chromatographic separation, MALDI-TOF mass spectrometry, and FTIR spectroscopy The structure and composition of polycarbonate polydimethylsiloxane copolymer (PC-co-PDMS) was investigated by applying various analytical approaches including chromatographic separation methods, spectrometric, and spectroscopic detection techniques. In particular, size exclusion chromatography (SEC) and liquid adsorption chromatography operating at different conditions (e.g. using gradient solvent systems) were used to achieve separations according to molar mass and functionality distribution. The coupling of both techniques resulted in fingerprint two-dimensional plots, which could be used to easily compare different copolymer batches. Matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry was applied for structural investigations. The different ionization behavior of both comonomers, however, strongly limited the applicability of this technique. In contrast to that, Fourier-transform Infrared (FTIR) spectroscopy could be used to quantify the amount of PDMS in the copolymer at different points in the chromatogram. The resulting methodology was capable of distinguishing PC-co-PDMS copolymer from PC homopolymer chains present in the material. Taylor & Francis 2020 International Journal of Polymer Analysis and Characterization 25 7 1 12 10.1080/1023666X.2020.1820170 2020-10-05 OPUS4-57307 Zeitschriftenartikel Becker, Roland; Scholz, Philipp; Jung, Christian; Weidner, Steffen Thermo-Desorption Gas Chromatography-Mass Spectrometry for investigating the thermal degradation of polyurethanes Thermo-Desorption Gas Chromatography-Mass Spectrometry (TD-GC-MS) was used to investigate the thermal degradation of two different polyurethanes (PU). PU samples were heated at different heating rates and the desorbed products were collected in a cold injection system and thereafter submitted to GC-MS. Prospects and limitations of the detection and quantification of semi-volatile degradation products were investigated. A temperature dependent PU depolymerization was found at temperatures above 200 °C proved by an increasing release of 1,4-butanediol and methylene diphenyl diisocyanate (MDI) representing the main building blocks of both polymers. Their release was monitored quantitatively based on external calibration with authentic compounds. Size Exclusion Chromatography (SEC) of the residues obtained after thermodesorption confirmed the initial competitive degradation mechanism indicating an equilibrium of crosslinking and depolymerization as previously suggested. Matrix-Assisted Laser Desorption Ionization (MALDI) mass spectrometry of SEC fractions of thermally degraded PUs provided additional hints on degradation mechanism. Royal Society for Chemistry 2023 Analytical Methods 1 6 10.1039/D3AY00173C 2023-04-17 OPUS4-39339 Zeitschriftenartikel Billing, Mark; Gräfe, Christine; Saal, Adrian; Biehl, Philip; Clement, Joachim; Dutz, silvio; Weidner, Steffen; Schacher, Felix Zwitterionic Iron Oxide (γ-Fe2O3) Nanoparticles Based on P(2VP-grad-AA) Copolymers This study presents the synthesis and characterization of zwitterionic core-shell hybrid nanoparticles consisting of a core of iron oxide multicore nanoparticles (MCNPs, γ-Fe2O3) and a shell of sultonated poly(2-vinylpyridine-grad-acrylic acid) copolymers. The gradient copolymers are prepared by reversible addition fragmentation chain transfer polymerization of 2-vinylpyridine (2VP), followed by the addition of tert-butyl acrylate and subsequent hydrolysis. Grafting of P(2VP-grad-AA) onto MCNP results in P(2VP-grad-AA)@MCNP, followed by quaternization using 1,3-propanesultone-leading to P(2VPS-grad-AA)@MCNP with a zwitterionic shell. The resulting particles are characterized by transmission electron microscopy, dynamic light scattering, and thermogravimetric analysis measurements, showing particle diameters of ≈70-90 nm and an overall content of the copolymer shell of ≈10%. Turbidity measurements indicate increased stability toward secondary aggregation after coating if compared to the pristine MCNP and additional cytotoxicity tests do not reveal any significant influence on cell viability. Wiley-VCH 2017 Macromolecular Rapid Communications 38 4 1600637-1 1600637-8 10.1002/marc.201600637 2017-03-14 OPUS4-55389 Zeitschriftenartikel Brirmi, M; Chabbah, T.; Chatti, S.; Schiets, F.; Casabianca, H.; Marestin, C.; Mercier, R.; Weidner, Steffen; Errachid, A.; Jaffrezic-Renault, N.; Ben Romdhane, H. Effect of the pendent groups on biobased polymers, obtained from click chemistry suitable, for the adsorption of organic pollutants from water In this work, four triazole-based poly(ether-pyridine)s polymers were synthesized and used as an adsorbent for the removal of phenolic compounds from aqueous solutions. For this purpose, new fluoromonomers containing 1,2,3-triazole units were prepared by the Cu(I)-catalyzed 1,3-dipolar cycloaddition reaction and then used for the elaboration of novel poly(ether-pyridine-triazole)s (PEPTs) by direct polyconden-sation with isosorbide and bisphenol A. Chemical structure of fluorinated pyridinicmonomers as well as resulting polymers was confirmed by 1H and 19F NMR spectroscopic methods. The thermal behavior of the obtained PEPTs was characterized using differential scanning calorimetry and thermogravimetric analysis. Results of sorption showed that polymers can be effectively used as a sorbent for the removal of polarorganic pollutants. The isosorbide-based poly(ether-pyridine-triazole) which contains hydrophilic hydroxyl groups as pendants chains (P4) exhibited the highest sorption efficiencies (78%-100% after 1 h). In order to explain the results an adsorption mech-anism mainly based on π-π interactions and hydrogen bonding with the pendent groups is proposed. Wiley online library 2022 Polymers for Advanced Technologies 1 21 10.1002/pat.5809 2022-07-27 OPUS4-29926 Zeitschriftenartikel Böhmert, L.; Girod, Matthias; Hansen, Ulf; Maul, Ronald; Knappe, Patrick; Niemann, B.; Weidner, Steffen; Thünemann, Andreas; Lampen, A. Analytically monitored digestion of silver nanoparticles and their toxicity on human intestinal cells Orally ingested nanoparticles may overcome the gastrointestinal barrier, reach the circulatory system, be distributed in the organism and cause adverse health effects. However, ingested nanoparticles have to pass through different physicochemical environments, which may alter their properties before they reach the intestinal cells. In this study, silver nanoparticles are characterised physicochemically during the course of artificial digestion to simulate the biochemical processes occurring during digestion. Their cytotoxicity on intestinal cells was investigated using the Caco-2 cell model. Using field-flow fractionation combined with dynamic light scattering and small-angle X-ray scattering, the authors found that particles only partially aggregate as a result of the digestive process. Cell viabilities were determined by means of CellTiter-Blue® assay, 4',6-diamidino-2-phenylindole-staining and real-time impedance. These measurements reveal small differences between digested and undigested particles (1-100 µg/ml or 1-69 particles/cell). The findings suggest that silver nanoparticles may indeed overcome the gastrointestinal juices in their particulate form without forming large quantities of aggregates. Consequently, the authors presume that the particles can reach the intestinal epithelial cells after ingestion with only a slight reduction in their cytotoxic potential. The study indicates that it is important to determine the impact of body fluids on the nanoparticles of interest to provide a reliable interpretation of their nano-specific cytotoxicity testing in vivo and in vitro. London Informa Healthcare 2014 Nanotoxicology 8 6 631 642 10.3109/17435390.2013.815284 2016-02-20 OPUS4-1608 Zeitschriftenartikel Cappella, Brunero; Sturm, Heinz; Weidner, Steffen Breaking polymer chains by dynamic plowing lithography The adhesion of poly(methyl methacrylate) (PMMA) and polystyrene (PS) films, whose surface has been previously structured by dynamic plowing lithography (DPL), has been measured by means of force–displacement curves. The different adhesion of modified and unmodified PS leads to the assumption that polymer chains are broken during DPL. After measuring the energy dissipated by the tip during DPL, in order to check that the transferred energy is sufficient to break covalent bonds, the polymer chain scission caused by the lithographic process has been definitely confirmed by size exclusion chromatography measurements of the lithographed films. Berlin Springer 2002 Polymer 43 16 4461 4466 10.1016/S0032-3861(02)00285-9 2016-02-19 OPUS4-57356 Zeitschriftenartikel Chabbah, T.; Chatti, S.; Jaffrezic-Renault, N.; Weidner, Steffen; Marestin, C.; Mercier, R. Impedimetric sensors based on diethylphosphonate-containingpoly(arylene ether nitrile)s films for the detection of lead ions This article describes the elaboration and characterization of diethylphosphonate-containing polymers coated electrodes as sensors for the detection of heavy metalstraces, by electrochemical impedance spectroscopy. Diethylphosphonate groupswere chosen as heavy metals binding sites. Two different series of polymers bearingthese anchoring groups were synthesized. Whereas the diethylphosphonate groupsare directly incorporated in the aromatic macromolecular chain in some polymers, analiphatic spacer is removing the chelating site from the polymer backbone in others.The influence of the macromolecular structure on the sensing response was studied,especially for the detection of Pb2+,Ni2+,Cd2+and Hg2+. Polymer P6, including thehigher amount of diethylphosphonate groups removed from the polymer chain by ashort alkyl spacer gave the higher sensitivity of detection of lead ions, with a detec-tion limit of 50 pM John Wiley & Sons, Ltd 2023 Polymers for Advanced Technologies 1 11 10.1002/pat.6065 2023-04-20 OPUS4-54980 Zeitschriftenartikel Chabbah, T.; Chatti, S.; Zouaoui, F.; Jlalia, A.; Gaiji, H.; Abderrazak, H.; Casablanca, H.; Mercier, R.; Weidner, Steffen; Errachid, A.; Marestin, C.; Jaffrezic-Renault, N. New poly(ether-phosphoramide)s sulfides based on green resources as sensitive films for the specific impedimetric detection of nickel ions For the development of selective and sensitive chemical sensors, we have developed a new family of poly(etherphosphoramide) polymers. These polymers were obtained with satisfactory yields by nucleophilic aromatic polycondensation using isosorbide as green resources, and bisphenol A with two novel difluoro phosphinothioic amide monomers. Unprecedented, the thiophosphorylated aminoheterocycles monomers, functionalized with two heterocyclic amine, N-methylpiperazine and morpholine were successfully obtained by nucleophilic substitution reaction of P(S)-Cl compound. The resulting polymers were characterized by different analytical techniques (NMR, MALDI-ToF MS, GPC, DSC, and ATG). The resulting partially green polymers, having tertiary phosphine sulfide with P-N side chain functionalities along the main chain of polymers are the sensitive film at the surface of a gold electrode for the impedimetric detection of Cd, Ni, Pb and Hg. The bio-based poly(etherphosphoramide) functionalized with N-methylpiperazine modified sensor showed better analytical performance than petrochemical based polymers for the detection of Ni2+. A detection limit of 50 pM was obtained which is very low compared to the previously published electrochemical sensors for nickel detection. Elsevier B.V. 2022 Talanta 247 123550 1 9 10.1016/j.talanta.2022.123550 2022-06-09 OPUS4-28577 Zeitschriftenartikel Chatti, S.; Weidner, Steffen; Fildier, A.; Kricheldorf, H.R. Copolyesters of isosorbide, succinic acid, and isophthalic acid: biodegradable, high Tg engineering plastics Isosorbide, succinyl chloride and isophthaloyl chloride are polycondensed under various reaction conditions. The heating in bulk with or without catalysts as well in an aromatic solvent without catalyst, and polycondensation with the addition of pyridine only yield low molar mass copolyesters. However, heating in chlorobenzene with addition of SnCl2 or ZnCl2 produces satisfactory molar masses. The number average molecular weights (Mn) of most copolyesters fall into the range of 7000-15,000 Da with polydispersities (PD) in the range of 3-9. The MALDI-TOF mass spectra almost exclusively displayed peaks of cyclics indicating that the chain growth was mainly limited by cyclization and not by side reactions, stoichiometric imbalance or incomplete conversion. The glass-transition temperatures increased with the content of isophthalic acid from 75 to 180 °C and the thermo-stabilities also followed this trend. Hoboken, NJ Wiley 2013 Journal of polymer science A, polymer chemistry 51 11 2464 2471 10.1002/pola.26635 2016-02-20 OPUS4-11099 Zeitschriftenartikel Czichocki, G.; Fiedler, H.; Haage, K.; Much, Helmut; Weidner, Steffen Characterization of alkyl polyglycosides by both reversed-phase and normal-phase modes of high-performance liquid chromatography Alkyl polyglycosides today represent the most important sugar surfactant. Nonionic sugar surfactants produced via different synthetic routes are mixtures of alkyl homologues, oligomers, anomers and isomers. Alkyl homologues and oligomers of alkyl mono- and diglucosides were separated by reversed-phase high-performance liquid chromatography (HPLC) with methanol–water as the mobile phase using a gradient elution. The gradient was optimized in respect to a simultaneous separation of alkyl glycosides according to their alkyl chain length and alkyl polyoxyethylene glucosides with regard to their length of the polyoxyethylene spacer. The separation of alkyl glycosides into ?- and ?-anomers was carried out by normal-phase HPLC with isooctane–ethyl acetate (60:40, v/v)–2-propanol in the gradient mode. Light scattering detection was used. Matrix-assisted laser desorption ionization time-of-flight mass spectra of alkyl glucosides and dodecyl glucosides with oxyethylene spacer groups are presented. Amsterdam Elsevier 2002 Journal of chromatography A 943 2 241 250 10.1016/S0021-9673(01)01459-5 2016-02-19 OPUS4-50482 Zeitschriftenartikel Diehn, S.; Zimmermann, B.; Tafintseva, V.; Seifert, S.; Bagcioglu, M.; Ohlson, M.; Weidner, Steffen; Fjellheim, S.; Kohler, A.; Kneipp, Janina Combining Chemical Information From Grass Pollen in Multimodal Characterization The analysis of pollen chemical composition is important to many fields, including agriculture, plant physiology, ecology, allergology, and climate studies. Here, the potential of a combination of different spectroscopic and spectrometric methods regarding the characterization of small biochemical differences between pollen samples was evaluated using multivariate statistical approaches. Pollen samples, collected from three populations of the grass Poa alpina, were analyzed using Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, surface enhanced Raman scattering (SERS), and matrix assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS). The variation in the sample set can be described in a hierarchical framework comprising three populations of the same grass species and four different growth conditions of the parent plants for each of the populations. Therefore, the data set can work here as a model system to evaluate the classification and characterization ability of the different spectroscopic and spectrometric methods. ANOVA Simultaneous Component Analysis (ASCA) was applied to achieve a separation of different sources of variance in the complex sample set. Since the chosen methods and sample preparations probe different parts and/or molecular constituents of the pollen grains, complementary information about the chemical composition of the pollen can be obtained. By using consensus principal component analysis (CPCA), data from the different methods are linked together. This enables an investigation of the underlying global information, since complementary chemical data are combined. The molecular information from four spectroscopies was combined with phenotypical information gathered from the parent plants, thereby helping to potentially link pollen chemistry to other biotic and abiotic parameters. 2020 Frontiers in Plant Science 10 1788 urn:nbn:de:kobv:b43-504822 10.3389/fpls.2019.01788 https://creativecommons.org/licenses/by/4.0/deed.de 2020-03-02 OPUS4-46529 Zeitschriftenartikel Diehn, Sabrina; Zimmermann, B.; Bagcioglu, M.; Seifert, Stephan; Kohler, A.; Ohlson, M.; Fjellheim, S.; Weidner, Steffen; Kneipp, Janina Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) shows adaption of grass pollen composition MALDI time-of-flight mass spectrometry (MALDI-TOF MS) has become a widely used tool for the classification of biological samples. The complex chemical composition of pollen grains leads to highly specific, fingerprint-like mass spectra, with respect to the pollen species. Beyond the species-specific composition, the variances in pollen chemistry can be hierarchically structured, including the level of different populations, of environmental conditions or different genotypes. We demonstrate here the sensitivity of MALDI-TOF MS regarding the adaption of the chemical composition of three Poaceae (grass) pollen for different populations of parent plants by analyzing the mass spectra with partial least squares discriminant analysis (PLS-DA) and principal component analysis (PCA). Thereby, variances in species, population and specific growth conditions of the plants were observed simultaneously. In particular, the chemical pattern revealed by the MALDI spectra enabled discrimination of the different populations of one species. Specifically, the role of environmental changes and their effect on the pollen chemistry of three different grass species is discussed. Analysis of the Group formation within the respective populations showed a varying influence of plant genotype on the classification, depending on the species, and permits conclusions regarding the respective rigidity or plasticity towards environmental changes. Nature 2018 Scientific Reports 8 1 16591, 1 11 urn:nbn:de:kobv:b43-465294 10.1038/s41598-018-34800-1 https://creativecommons.org/licenses/by/4.0/deed.de 2018-11-09 OPUS4-35930 Zeitschriftenartikel Doriti, A.; Brosnan, S.; Weidner, Steffen; Schlaad, H. Synthesis of polysarcosine from air and moisture stable N-phenoxycarbonyl-N-methylglycine assisted by tertiary amine base Polysarcosine (M-n = 3650-20 000 g mol(-1), D similar to 1.1) was synthesized from the air and moisture stable N-phenoxycarbonyl-N-methylglycine. Polymerization was achieved by in situ transformation of the urethane precursor into the corresponding N-methylglycine-N-carboxyanhydride, when in the presence of a non-nucleophilic tertiary amine base and a primary amine initiator. 2016 Polymer Chemistry 7 18 3067 3070 urn:nbn:de:kobv:b43-359309 10.1039/c6py00221h http://creativecommons.org/licenses/by/3.0/de/deed.de 2016-05-04 OPUS4-25378 Zeitschriftenartikel El Malah, T.; Ciesielski, A.; Piot, L.; Troyanov, S.I.; Mueller, U.; Weidner, Steffen; Samorì, P.; Hecht, S. Conformationally pre-organized and pH-responsive flat dendrons: synthesis and self-assembly at the liquid-solid interface Efficient Cu-catalyzed 1,3-dipolar cycloaddition reactions have been used to prepare two series of three regioisomers of G-1 and G-2 poly(triazole-pyridine) dendrons. The G-1 and G-2 dendrons consist of branched yet conformationally pre-organized 2,6-bis(phenyl/pyridyl-1,2,3-triazol-4-yl)pyridine (BPTP) monomeric and trimeric cores, respectively, carrying one focal and either two or four peripheral alkyl side chains. In the solid state, the conformation and supramolecular organization were studied by means of a single crystal X-ray structure analysis of one derivative. At the liquid–solid interface, the self-assembly behavior was investigated by scanning tunneling microscopy (STM) on graphite surfaces. Based on the observed supramolecular organization, it appears that the subtle balance between conformational preferences inherent in the dendritic backbone on the one side and the adsorption and packing of the alkyl side chains on the graphite substrate on the other side dictate the overall structure formation in 2D. Cambridge RSC Publ. 2012 Nanoscale 4 467 472 10.1039/c1nr11434d 2016-02-19 OPUS4-25822 Zeitschriftenartikel El Malah, T.; Rolf, Simone; Weidner, Steffen; Thünemann, Andreas; Hecht, S. Amphiphilic folded dendrimer discs and their thermosensitive self-assembly in water Folded dendrimers with peripheral ether side chains show a thermally induced hierarchical aggregation process, in which the transition temperature and the dimensions of the aggregates can readily be tuned via the generation number (see figure). Weinheim Wiley-VCH Verl. 2012 Chemistry - A European journal 18 19 5837 5842 10.1002/chem.201200414 2016-02-19 OPUS4-25461 Zeitschriftenartikel Enthaler, S.; Krackl, S.; Epping, J.D.; Eckhardt, B.; Weidner, Steffen; Fischer, A. Iron-based pre-catalyst supported on polyformamidine for C-C bond formation In the present study the incorporation of iron into an organic polymer, composed of formamidine subunits [R-N=C(H)-NH-R], has been examined. The catalytic ability of the recyclable material was investigated in the iron-catalyzed formation of C-C bonds. After optimization of the reaction conditions, excellent yields and chemoselectivities were feasible. Royal Society of Chemistry (RSC) 2012 Polymer chemistry 3 3 751 756 10.1039/c2py00540a 2016-02-19 OPUS4-2168 Zeitschriftenartikel Falkenhagen, Jana; Friedrich, Jörg Florian; Schulz, Günter; Krüger, Ralph-Peter; Much, Helmut; Weidner, Steffen Liquid Adsorption Chromatography near Critical Conditions of Adsorption coupled with Matrix-assisted Laser Desorption/Ionization Mass Spectrometry Chemical heterogeneities and molecular weight distributions of poly(ethylene oxide) (PEO)-co-polymethylene (PM) model oligomers, which are relevant to the synthesis of commonly used tensides, were investigated. For analytical characterization, the well-known principle of liquid adsorption chromatography at 'critical conditions' (LACCC) was modified. Near the critical conditions of adsorption of the PEO unit, e.g., at slight adsorption conditions of PM, the copolymers could be separated according to their PM chain length. The eluates were separated and single fractions of each peak were continuously transferred onto the MALDI target by means of a commercially available device. Simultaneously, the MALDI matrix solution was continuously added with a second pump. This procedure offers the possibility of the formation of homogeneous matrix-polymer textures. By MALDI-MS a complete characterization of the chemical composition (PEO and PM chain length) of each peak could be achieved. The obtained MALDI mass spectra of the eluates at different retention times could be used for the molecular weight calibration of the LAC system. In this way, an additional application of SEC, as in conventional 2D-chromatography, was avoided by using the MALDI method as quasi chromatographic separation Amsterdam Gordon and Breach Publ. 2000 International journal of polymer analysis and characterization 5 549 562 10.1080/10236660008034644 2016-02-19 OPUS4-2250 Beitrag zu einem Sammelband Falkenhagen, Jana; Krüger, Ralph-Peter; Much, Helmut; Schulz, Günter; Weidner, Steffen Grellmann, W. Characterization and identification of new polymer structures by optimization and coupling of HPLC and MALDI-TOF-MS Halle Martin-Luther-Univ. Universität, Halle, Saale / Fachbereich Ingenieurwissenschaften 2000 Polymerwerkstoffe 2000 3-86010-605-8 Polymerwerkstoffe 2000 Halle (Saale), Germany 2000-09-25 2000-09-27 2016-02-19 OPUS4-1805 Beitrag zu einem Tagungsband Falkenhagen, Jana; Krüger, Ralph-Peter; Schulz, Günter; Weidner, Steffen Polymer Characterization by LC / MALDI-MS Coupling Gesellschaft Deutscher Chemiker 2002 Vortragstagung "Funktionspolymere für Systemlösungen" Vortragstagung "Funktionspolymere für Systemlösungen" Darmstadt, Germany 2002-03-18 2002-03-19 2016-02-19