TY - JOUR A1 - Walther, T. A1 - Gerthsen, D. A1 - Carius, Reinhard A1 - Förster, Arnold T1 - AlAs/GaAs Quantum well structures: Interface properties investigated by high-resolution transmission electron microscopy and photoluminescence spectroscopy / T. Walther ; D. Gerthsen ; R. Carius ; A. Förster ... JF - Microscopy of semiconducting materials 1993 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 5 - 8 April 1993 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 134) Y1 - 1993 SN - 0-7503-0290-9 N1 - Royal Microscopical Society Conference on Microscopy of Semiconducting Materials <8, 1993, Oxford> ; MSM <8, 1993, Oxford> SP - 449 EP - ff. PB - Institute of Physics CY - Bristol [u.a.] ER - TY - JOUR A1 - Wang, J. A1 - Krause, R. A1 - Block, K. A1 - Musameh, M. A1 - Mulchandani, A. A1 - Schöning, Michael Josef T1 - Flow injection amperometric detection of OP nerve agents based on organophosphorus-hydrolase biosensor detector JF - Biosensors & Bioelectronics. 18 (2003), H. 2-3 Y1 - 2003 SN - 0956-5663 SP - 255 EP - 260 ER - TY - JOUR A1 - Wang, Mao A1 - Anik, Sabri A1 - Frohberg, Martin G. T1 - Thermodynamics of oxygen in the lead-antimony system at 1173 K JF - Erzmetall : Rohstoffgewinnung, Verarbeitung, Recycling, Umwelttechnik Y1 - 1987 SN - 0044-2658 VL - 40 IS - 6 SP - 316 EP - 319 ER - TY - JOUR A1 - Wang, Mao A1 - Anik, Sabri A1 - Frohberg, Martin G. T1 - Experiments on the electrochemical determination of the sulphur activities in the system copper-silver at 1200°C JF - Zeitschrift für Metallkunde Y1 - 1988 SN - 0044-3093 VL - 79 IS - 5 SP - 336 EP - 339 ER - TY - JOUR A1 - Wang, Ren-Qi A1 - Druckenmüller, Katharina A1 - Elbers, Gereon A1 - Guenther, Klaus A1 - Croué, Jean-Philippe T1 - Analysis of aquatic-phase natural organic matter by optimized LDI-MS method JF - Journal of mass spectrometry N2 - The composition and physiochemical properties of aquatic-phase natural organic matter (NOM) are most important problems for both environmental studies and water industry. Laser desorption/ionization (LDI) mass spectrometry facilitated successful examinations of NOM, as humic and fulvic acids in NOM are readily ionized by the nitrogen laser. In this study, hydrophobic NOMs (HPO NOMs) from river, reservoir and waste water were characterized by this technique. The effect of analytical variables like concentration, solvent composition and laser energy was investigated. The exact masses of small molecular NOM moieties in the range of 200–1200 m/z were determined in reflectron mode. In addition, spectra of post-source-decay experiments in this range showed that some compounds from different natural NOMs had the same fragmental ions. In the large mass range of 1200–15 000 Da, macromolecules and their aggregates were found in HPO NOMs from natural waters. Highly humic HPO exhibited mass peaks larger than 8000 Da. On the other hand, the waste water and reservoir water mainly had relatively smaller molecules of about 2000 Da. The LDI-MS measurements indicated that highly humic river waters were able to form large aggregates and membrane foulants, while the HPO NOMs from waste water and reservoir water were unlikely to form large aggregates. Copyright © 2014 John Wiley & Sons, Ltd. Y1 - 2014 U6 - https://doi.org/10.1002/jms.3321 SN - 1096-9888 VL - 49 IS - 2 SP - 154 EP - 160 PB - Wiley CY - Bognor Regis ER - TY - JOUR A1 - Wardoyo, Arinto Y.P. A1 - Noor, Johan A.E. A1 - Elbers, Gereon A1 - Schmitz, Sandra A1 - Flaig, Sascha T. A1 - Budianto, Arif T1 - Characterizing volcanic ash elements from the 2015 eruptions of bromo and raung volcanoes, Indonesia JF - Polish Journal of Environmental Studies N2 - The volcanic eruptions of Mt. Bromo and Mt. Raung in East Java, Indonesia, in 2015 perturbed volcanic materials and affected surface-layer air quality at surrounding locations. During the episodes, the volcanic ash from the eruptions influenced visibility, traffic accidents, flight schedules, and human health. In this research, the volcanic ash particles were collected and characterized by relying on the detail of physical observation. We performed an assessment of the volcanic ash elements to characterize the volcanic ash using two different methods which are aqua regia extracts followed by MP-AES and XRF laboratory test of bulk samples. The analysis results showed that the volcanic ash was mixed of many materials, such as Al, Si, P, K, Ca, Ti, V, Cr, Mn, Fe, Ni, and others. Fe, Si, Ca, and Al were found as the major elements, while the others were the trace elements Ba, Cr, Cu, Mn, P, Mn, Ni, Zn, Sb, Sr, and V with the minor concentrations. XRF analyses showed that Fe dominated the elements of the volcanic ash. The XRF analysis showed that Fe was at 35.40% in Bromo and 43.00% in Raung of the detected elements in bulk material. The results of aqua regia extracts analyzed by MP-AES were 1.80% and 1.70% of Fe element for Bromo and Raung volcanoes, respectively. Y1 - 2020 U6 - https://doi.org/10.15244/pjoes/99101 SN - 2083-5906 VL - 29 IS - 2 SP - 1899 EP - 1907 PB - HARD CY - Olsztyn ER - TY - JOUR A1 - Warerkar, Shashikant A1 - Schmitz, Stefan A1 - Göttsche, Joachim A1 - Hoffschmidt, Bernhard T1 - Wirtschaftlich und flexibel : Luft-Sand-Wärmeübertrager für die Energiespeicherung bei Temperaturen bis 800 °C JF - Verfahrenstechnik. 41 (2007), H. 4 Y1 - 2007 SN - 0175-5315 N1 - Comsol-Konferenz zur Multiphysik-Simulation <2006, Frankfurt> SP - 72 EP - 73 ER - TY - JOUR A1 - Warerkar, Shashikant A1 - Schmitz, Stefan A1 - Göttsche, Joachim A1 - Hoffschmidt, Bernhard A1 - Reißel, Martin A1 - Tamme, Rainer T1 - Air-Sand Heat Exchanger for High-Temperature Storage JF - Journal of Solar Energy Engineering. 133 (2011), H. 2 Y1 - 2011 SN - 0199-6231 N1 - 7 pages SP - 021010 PB - ASME CY - New York ER - TY - JOUR A1 - Warmer, Johannes A1 - Wagner, Patrick A1 - Schöning, Michael Josef A1 - Kaul, Peter T1 - Detection of triacetone triperoxide using temperature cycled metal-oxide semiconductor gas sensors JF - Physica status solidi (a) Y1 - 2015 U6 - https://doi.org/10.1002/pssa.201431882 SN - 1862-6319 VL - 212 IS - 6 SP - 1289 EP - 1298 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Weber, Hans-Joachim T1 - Verbundforschungsprojekt Multimediale 3D-Visualisierung der Herzmuskelerregung JF - Intelligente, innovative Produktentwicklung für die industrielle Praxis. Stenzel, Horst [Hrsg.] Y1 - 2001 N1 - Forschungsverbund Multimedia an Fachhochschulen in Nordrhein-Westfalen SP - 99 EP - 112 PB - Forschungverbund Multimedia an Fachhochschulen CY - Köln ER -