TY - JOUR A1 - Wachsen, O. A1 - Reichert, K.H. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Thermal decomposition of biodegradable polyesters - III. Studies on the mechanisms of thermal degradation of oligo-L-lactide using SEC, LACCC and MALDI-TOF-MS PY - 1997 SN - 0141-3910 SN - 1873-2321 VL - 55 SP - 225 EP - 231 PB - Applied Science Publ. CY - London AN - OPUS4-2154 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tressl, R. A1 - Wondrak, G. T. A1 - Krüger, Ralph-Peter A1 - Rewicki, D. T1 - New Melanoidin-like Maillard Polymers from 2-Deoxypentoses KW - Maillard system 2-deoxy-D-ribose / methylamine KW - Oligomerization of N-methyl-2-hydroxymethyl(and hydroxyl[13C]methyl)pyrrole KW - Antioxidative activity KW - Model compounds for melanoidins PY - 1998 SN - 0021-8561 SN - 1520-5118 VL - 46 IS - 1 SP - 104 EP - 110 PB - American Chemical Society CY - Columbus, Ohio AN - OPUS4-2158 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tressl, R. A1 - Wondrak, G. T. A1 - Garbe, L.-A. A1 - Krüger, Ralph-Peter A1 - Rewicki, D. T1 - Pentoses and Hexoses as Sources of New Melanoidin-like Maillard-Polymers KW - Model compounds for melanoidins KW - Pyrroles from pentoses and hexoses KW - Beta-dicarbonyl pathway of the Maillard reaction KW - Polycondensation KW - MALDI-TOF-MS analysis KW - Antioxidative activity of oligomeric model compounds PY - 1998 SN - 0021-8561 SN - 1520-5118 VL - 46 IS - 5 SP - 1765 EP - 1776 PB - American Chemical Society CY - Columbus, Ohio AN - OPUS4-2159 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Tressl, R. A1 - Wondrak, G. T. A1 - Kersten, E. A1 - Krüger, Ralph-Peter A1 - Rewicki, D. ED - Shibamoto, T. ED - Terao, J. ED - Osawa, T. T1 - Identification of maillard type polymers with antioxidative activity T2 - 213th National Meeting of the American Chemical Society CY - San Francisco, CA, USA DA - 1997-04-13 PY - 1998 SN - 0-8412-3573-2 SN - 0097-6156 N1 - Serientitel: ACS Symposium Series – Series title: ACS Symposium Series IS - 702 SP - 209 EP - 220 PB - American Chemical Society CY - Washington, DC AN - OPUS4-2160 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kricheldorf, H.R. A1 - Böhme, S. A1 - Krüger, Ralph-Peter T1 - Macrocycles, 16a - Macrocyclic Dibutyltin Dicarboxylates via Thermodynamically Controlled Polycondensations N2 - Various dibutyltin derivatives were polycondensed with aliphatic ,-dicarboxylic acids having chain lengths from 4 (succinic acid) to 22 carbon atoms. White crystalline products were obtained from all experiments, and the structure of the products was independent of the synthetic method. Viscosity measurements revealed low molecular weights (n 1 500 Da) in all cases. Vapor pressure osmometry (VPO) measurements and matrix-assisted laser desorption time-of-flight (MALDI-TOF) mass spectrometry proved that cyclic dimers and trimer were formed from dicarboxylic acids having 6 to 16 carbons, but mainly the monomeric cycle from docosane dioic acid. Heating to 250°C did not change the structure. Therefore, the results indicate that the macrocycles are the result of a thermodynamically controlled ring-closing polycondensation. This means that linear high-molecular weight poly(dibutyltin dicarboxylate)s cannot exist above room temperature. KW - Macrocyclics KW - MALDI KW - Oligomers KW - Polycondensation KW - Thermodynamics PY - 2002 SN - 1022-1352 SN - 1521-3935 VL - 203 IS - 2 SP - 313 EP - 318 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-2181 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kilz, P. A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter ED - Provder, T. T1 - Two-dimensional chromatography for the deformulation of complex copolymers PY - 1995 SN - 0-8412-3132-X N1 - Serientitel: Advances in chemistry series – Series title: Advances in chemistry series IS - 247 SP - 223 EP - 241 PB - American Chemical Society CY - Washington AN - OPUS4-2185 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Just, Ulrich A1 - Krüger, Ralph-Peter ED - Auner, N. T1 - Investigations of Chemical Heterogeneity in Polydimethylsiloxanes using SFC, HPLC and MALDI-MS T2 - 2. Münchner Silicontage ; 2nd Munich Silicon Days CY - Munich, Germany DA - 1994-01-01 PY - 1996 SN - 3-527-29254-3 SP - 625 EP - 632 PB - VCH CY - Weinheim AN - OPUS4-2186 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Rikowski, E. ED - Auner, N. T1 - Synthesis of Polyhedral Hexa-, Octa-, Deca- and Dodeca-Silsesquioxanes, Separation by NP-HPLC, SEC and LAC, Characterization by MALDI-TOF-MS KW - Silsesquioxanes KW - NP-HPLC KW - LAC KW - SEC KW - MALDI-TOF-MS PY - 2000 SN - 3-527-29854-1 SP - 545 ff. PB - Wiley-VCH CY - Weinheim AN - OPUS4-2187 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krüger, Ralph-Peter A1 - Falkenhagen, Jana A1 - Schulz, Günter A1 - Weinmann, S. ED - Radusch, H.-J. ED - Fiedler, L. T1 - Beiträge zur Charakterisierung von Polyactiden durch Kopplung von HPLC-Trennmethoden mit der MALDI-Flugzeitmassenspektrometrie T2 - Internationale Fachtagung Polymerwerkstoffe ; P-2002 CY - Halle (Saale), Deutschland DA - 2002-09-25 PY - 2002 SN - 3-86010-656-2 PB - Martin-Luther-Univ. Halle-Wittenberg CY - Halle (Saale) AN - OPUS4-2189 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Janiak, Ch. A1 - Lange, K.C.H. A1 - Marquardt, P. A1 - Krüger, Ralph-Peter A1 - Hanselmann, R. ED - Sun, J. ED - Janiak, C. T1 - Propene and 1-hexene oligomerization with unbridged alkyl-substituted cyclopentadienyl- and phospholyl-zirconium/MAO catalysts - mechanistic implications from oligomer analyses by NMR, SEC, and MALDI-TOF MS PY - 2001 SP - 117 EP - 142 PB - Chemical Industry Press CY - Bejing AN - OPUS4-2193 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter ED - Günther, W. T1 - Strukturaufklärung von heterogenen Polymeren durch zweidimensionale Flüssigchromatographie und MALDI-TOF-Massenspektrometrie T2 - InCom '94 - International Symposium on Instrumentalized Analytical Chemistry and Computer Technology CY - Düsseldorf, Deutschland DA - 1994-03-14 PY - 1994 VL - 94 PB - InCom-Bureau CY - Düsseldorf AN - OPUS4-2195 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter T1 - Polymer Characterization by Two-Dimensional HPLC and MALDI-TOF-MS T2 - 7th International Symposium on Polymer Analysis and Characterization (ISPAC) CY - Les Diablerets, Switzerland DA - 1994-05-24 PY - 1994 PB - Gordon and Breach CY - St. Helier, Jersey AN - OPUS4-2196 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Sonnenschein, Helmut A1 - Kreher, Th. A1 - Krüger, Ralph-Peter A1 - Ahlers, B. T1 - Synthesis of brigded indolizines-starting materials for molecular tweezers T2 - XVI th European Colloquium on Heterocyclic Chemistry CY - Bled, Slovenia DA - 1994-09-25 PY - 1994 CY - Bled, Slovenia AN - OPUS4-2198 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinhardt, M. A1 - Krüger, Ralph-Peter A1 - v. Lampe, I. A1 - Lorkowski, H.-J. T1 - Über Lösekinetik und Acidität einiger phenolischer Polymere T2 - 5. Berliner Polymertage 1994 CY - Potsdam DA - 1994-10-05 PY - 1994 CY - Potsdam AN - OPUS4-2199 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Paulus, G. A1 - Resch, M. A1 - Schulz, Günter ED - Darms, R. ED - Suter, U. T1 - Polymer Characterization by MALDI-TOF-MS and Combination with HPLC T2 - 5th European Polymer Federation Symposium on Polymeric Materials (EPF) CY - Basel, Switzerland DA - 1994-10-09 PY - 1994 SN - 3-85739-297-5 SN - 0258-0322 VL - 5 PB - Hüthig & Wepf CY - Zug AN - OPUS4-2200 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Falkenhagen, Jana A1 - Krüger, Ralph-Peter A1 - Maier, Bärbel A1 - Much, Helmut A1 - Schulz, Günter T1 - Orthogonal two-dimensional chromatography of poly(ethylene oxid) adducts T2 - HPLC '96 CY - San Francisco, CA, USA DA - 1996-06-16 PY - 1996 CY - San Francisco AN - OPUS4-2221 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Schulz, Günter A1 - Frey, H. T1 - Characterization of unusual Silsesquioxane-Based Polymer Architectures Based on the Coupling of Liquid Chromatography and MALDI-TOF-MS T2 - 11th International Symposium on Organosilicon Chemistry CY - Montpellier, France DA - 1996-09-01 PY - 1996 CY - Montpellier AN - OPUS4-2222 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Much, Helmut A1 - Falkenhagen, Jana A1 - Krüger, Ralph-Peter A1 - Schulz, Günter ED - Berger, T. T1 - New methods for characterization of polymer heterogeneity by combination of HPLC with MALDI-TOF-MS T2 - 21st International Symposium on Chromatography CY - Stuttgart, Germany DA - 1996-09-15 PY - 1996 SN - 0009-5893 IS - 45 PB - Vieweg CY - Wiesbaden AN - OPUS4-2223 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, A. A1 - Krüger, Ralph-Peter T1 - Quantitative analysis of molecular weight distribution obtained by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry T2 - DECHEMA-Diskussionstagung "Neue Methoden der Polymeranalytik" CY - Mainz, Germany DA - 1996-10-07 PY - 1996 CY - Mainz AN - OPUS4-2224 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Krüger, Ralph-Peter A1 - Much, Helmut A1 - Pickard, M. A1 - Schulz, Günter A1 - Wachsen, O. T1 - Characterization of thermal and hydrolytic degradation of polylactides by Liquid Chromatography and MALDI-TOF mass spectrometry T2 - International Symposium on "Biodegradable Materials" and Hamburger Makromolekulares Symposium CY - Hamburg, Germany DA - 1996-10-07 PY - 1996 CY - Hamburg AN - OPUS4-2225 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -