TY - JOUR A1 - Eckert, Alexander A1 - Abbasi, Mozhdeh A1 - Mang, Thomas A1 - Saalwächter, Kay A1 - Walther, Andreas T1 - Structure, Mechanical Properties, and Dynamics of Polyethylenoxide/Nanoclay Nacre-Mimetic Nanocomposites JF - Macromolecules N2 - Nacre-mimetic nanocomposites based on high fractions of synthetic high-aspect-ratio nanoclays in combination with polymers are continuously pushing boundaries for advanced material properties, such as high barrier against oxygen, extraordinary mechanical behavior, fire shielding, and glass-like transparency. Additionally, they provide interesting model systems to study polymers under nanoconfinement due to the well-defined layered nanocomposite arrangement. Although the general behavior in terms of forming such layered nanocomposite materials using evaporative self-assembly and controlling the nanoclay gallery spacing by the nanoclay/polymer ratio is understood, some combinations of polymer matrices and nanoclay reinforcement do not comply with the established models. Here, we demonstrate a thorough characterization and analysis of such an unusual polymer/nanoclay pair that falls outside of the general behavior. Poly(ethylene oxide) (PEO) and sodium fluorohectorite form nacre-mimetic, lamellar nanocomposites that are completely transparent and show high mechanical stiffness and high gas barrier, but there is only limited expansion of the nanoclay gallery spacing when adding increasing amounts of polymer. This behavior is maintained for molecular weights of PEO varied over four orders of magnitude and can be traced back to depletion forces. By careful investigation via X-ray diffraction and proton low-resolution solid-state NMR, we are able to quantify the amount of mobile and immobilized polymer species in between the nanoclay galleries and around proposed tactoid stacks embedded in a PEO matrix. We further elucidate the unusual confined polymer dynamics, indicating a relevant role of specific surface interactions. Y1 - 2020 U6 - https://doi.org/10.1021/acs.macromol.9b01931 SN - 1520-5835 VL - 53 IS - 5 SP - 1716 EP - 1725 PB - ACS Publications CY - Washington, DC ER - TY - JOUR A1 - Dünnwald, Thomas A1 - Demir, Ayhan S. A1 - Siegert, Petra A1 - Pohl, Martina A1 - Müller, Michael T1 - ChemInform Abstract: Enantioselective synthesis of (S)-2-Hydroxypropanone derivatives by Benzoylformate Decarboxylase Catalyzed C—C Bond Formation JF - Cheminform Y1 - 2001 SN - 1522-2667 (E-Journal); 0931-7597 (Print) VL - Vol. 32 IS - Iss. 4 SP - Publ. online ER - TY - JOUR A1 - Dünnwald, Thomas A1 - Demir, Ayhan S. A1 - Siegert, Petra A1 - Pohl, Martina A1 - Müller, Michael T1 - Enantioselective Synthesis of (S)-2-Hydroxypropanone Derivatives by Benzoylformate Decarboxylase Catalyzed C−C Bond Formation JF - European journal of organic chemistry Y1 - 2000 SN - 0365-5490 (E-Journal); 1099-0690 (E-Journal); 0075-4617 (Print); 0170-2041 (Print); 0947-3440 (Print); 1434-193X (Print); 1434-243X (Print) VL - Vol. 2000 IS - Iss. 11 SP - 2161 EP - 2170 ER - TY - JOUR A1 - Dünkelmann, Pascal A1 - Kolter-Jung, Doris A1 - Nitsche, Adam A1 - Demir, Ayhan S. A1 - Siegert, Petra A1 - Lingen, Bettina A1 - Baumann, Martin A1 - Pohl, Martina A1 - Müller, Michael T1 - Development of a donor-acceptor concept for enzymatic cross-coupling reactions of adehydes : the first asymmetric cross-benzoin condensation JF - Journal of the American Chemical Society Y1 - 2002 SN - 1520-5126 (E-Journal); 0002-7863 (Print) VL - Vol. 124 SP - 12084 EP - 12085 ER - TY - JOUR A1 - Döring, Bernd A1 - Reger, Vitali A1 - Kuhnhenne, Markus A1 - Feldmann, Markus A1 - Kesti, Jyrki A1 - Lawson, Mark A1 - Botti, Andrea T1 - Steel solutions for enabling zero-energy buildings JF - Steel Construction - Design and Research Y1 - 2015 U6 - https://doi.org/10.1002/stco.201510029 SN - 1867-0539 N1 - The 13th Nordic Steel Construction Conference, Tampere, 2015 (NSCC-2015) VL - 8 IS - 3 SP - 194 EP - 200 PB - Ernst & Sohn CY - Berlin ER - TY - JOUR A1 - Döring, Bernd A1 - Kuhnhenne, Markus A1 - Hellberg, Jan A1 - Feldmann, Markus T1 - Aktive und passive Temperierung eines Stahldeckensystems : thermische Bauteilaktivierung : numerische und messtechnische Untersuchungen. T. 2. JF - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik Y1 - 2008 SN - 1436-5103 N1 - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739 VL - Bd. 59 IS - H. 11 SP - 37 EP - 41 ER - TY - JOUR A1 - Döring, Bernd A1 - Kuhnhenne, Markus A1 - Hellberg, Jan A1 - Feldmann, Markus T1 - Aktive und passive Temperierung eines Stahldeckensystems : numerische und messtechnische Untersuchungen. T. 1 JF - HLH : Lüftung, Klima, Heizung, Sanitär, Gebäudetechnik Y1 - 2008 SN - 1436-5103, 0017-9906, 1434-422X, 1436-5103 N1 - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739 VL - Bd. 59 IS - H. 10 SP - 54 EP - 60 ER - TY - JOUR A1 - Döring, Bernd A1 - Kendrick, C. A1 - Lawson, R. M. T1 - Thermal capacity of composite floor slabs JF - Energy and buildings Y1 - 2013 SN - 1872-6178 (E-Journal); 0378-7788 (Print) VL - Vol. 67 SP - 531 EP - 539 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Döring, Bernd A1 - Hechler, O. A1 - Weber, F. A1 - Sedlacek, Gerhard T1 - Thermische Aktivierung von Fertigteildecken JF - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik Y1 - 2004 SN - 1436-5103 N1 - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739 VL - Jg. 55 IS - Nr. 5 SP - 24 EP - 35 ER - TY - JOUR A1 - Döring, Bernd A1 - Feldmann, Markus A1 - Kuhnhenne, Markus A1 - Müller, Dirk T1 - Phasenwechselmaterial im Metallleichtbau zur Optimierung von Energieeffizienz und sommerlicher Raumtemperatur JF - Stahlbau Y1 - 2011 SN - 1437-1049 (E-Journal); 0038-9145 (Print) VL - Vol. 80 IS - Iss. 9 SP - 666 EP - 672 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Döring, Bernd A1 - Feldmann, Markus A1 - Kuhnhenne, Markus T1 - Der Beitrag von Profilblechdecken zur passiven Kühlung JF - Bauphysik Y1 - 2009 SN - 1437-0980 (E-Journal); 0171-5445 (Print) N1 - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 435 VL - Vol. 31 IS - Iss. 2 SP - 65 EP - 71 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Dören, Horst-Peter A1 - Wernicke, K. T1 - Slijtvaste lagen door oplassen met plasmapoeder JF - Metaal en Kunststof: MK. Universeel weekblad voor fabriek en werkplaats. 24 (1987), Nr. 23 Y1 - 1987 SN - 0026-0460 SP - 76 EP - 79 ER - TY - JOUR A1 - Dutta, Suryendu A1 - Hartkopf-Fröder, Christoph A1 - Witte, Karin A1 - Brocke, Rainer A1 - Mann, Ulrich T1 - Molecular characterization of fossil palynomorphs by transmission micro-FTIR spectroscopy: implications for hydrocarbon source evaluation JF - International journal of coal geology Y1 - 2013 SN - 1872-7840 (E-Journal); 0166-5162 (Print) VL - Vol. 115 SP - 13 EP - 23 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Duong, Minh Tuan A1 - Nguyen, Nhu Huynh A1 - Tran, Thanh Ngoc A1 - Tolba, R. H. A1 - Staat, Manfred T1 - Influence of refrigerated storage on tensile mechanical properties of porcine liver and spleen JF - International biomechanics Y1 - 2015 U6 - https://doi.org/10.1080/23335432.2015.1049295 SN - 2333-5432 VL - Vol. 2 IS - Iss. 1 SP - 79 EP - 88 PB - Taylor & Francis CY - London ER - TY - JOUR A1 - Duong, Minh Tuan A1 - Nguyen, Nhu Huynh A1 - Staat, Manfred T1 - Physical response of hyperelastic models for composite materials and soft tissues JF - Asia pacific journal on computational engineering Y1 - 2015 U6 - https://doi.org/10.1186/s40540-015-0015-x SN - 2196-1166 VL - 2 IS - 3 (December 2015) SP - 1 EP - 18 ER - TY - JOUR A1 - Dues, M. A1 - Gebhardt, Andreas A1 - Kallweit, Stephan A1 - Scheffler, T. A1 - Siekmann, H. A1 - Uchiyama, T. T1 - Flow Visualization in a Cavitating Flow JF - Proceedings of the German-Japanese Symposium on Multi-Phase Flow : Karlsruhe, Germany, August 23 - 25, 1994 / comp. by U. Müller ... Y1 - 1994 N1 - German Japanese Symposium on Multi-Phase Flow <1994, Karlsruhe> ; Kernforschungszentrum Karlsruhe ; 5389 SP - 391 EP - 402 PB - Kernforschungszentrum Karlsruhe CY - Karlsruhe ER - TY - JOUR A1 - Drumm, Christian A1 - Emhardt, Selina N. A1 - Kok, Ellen M. A1 - Jarodzka, Halzka A1 - Brand-Gruwel, Saskia A1 - van Gog, Tamara T1 - How Experts Adapt Their Gaze Behavior When Modeling a Task to Novices JF - Cognitive science N2 - Domain experts regularly teach novice students how to perform a task. This often requires them to adjust their behavior to the less knowledgeable audience and, hence, to behave in a more didactic manner. Eye movement modeling examples (EMMEs) are a contemporary educational tool for displaying experts’ (natural or didactic) problem-solving behavior as well as their eye movements to learners. While research on expert-novice communication mainly focused on experts’ changes in explicit, verbal communication behavior, it is as yet unclear whether and how exactly experts adjust their nonverbal behavior. This study first investigated whether and how experts change their eye movements and mouse clicks (that are displayed in EMMEs) when they perform a task naturally versus teach a task didactically. Programming experts and novices initially debugged short computer codes in a natural manner. We first characterized experts’ natural problem-solving behavior by contrasting it with that of novices. Then, we explored the changes in experts’ behavior when being subsequently instructed to model their task solution didactically. Experts became more similar to novices on measures associated with experts’ automatized processes (i.e., shorter fixation durations, fewer transitions between code and output per click on the run button when behaving didactically). This adaptation might make it easier for novices to follow or imitate the expert behavior. In contrast, experts became less similar to novices for measures associated with more strategic behavior (i.e., code reading linearity, clicks on run button) when behaving didactically. Y1 - 2020 U6 - https://doi.org/10.1111/cogs.12893 SN - 1551-6709 VL - 44 IS - 9 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Druckenmüller, Katharina A1 - Günther, Klaus A1 - Elbers, Gereon T1 - Near-infrared spectroscopy (NIRS) as a tool to monitor exhaust air from poultry operations JF - Science of the Total Environment N2 - Intensive poultry operation systems emit a considerable volume of inorganic and organic matter in the surrounding environment. Monitoring cleaning properties of exhaust air cleaning systems and to detect small but significant changes in emission characteristics during a fattening cycle is important for both emission and fattening process control. In the present study, we evaluated the potential of near-infrared spectroscopy (NIRS) combined with chemometric techniques as a monitoring tool of exhaust air from poultry operation systems. To generate a high-quality data set for evaluation, the exhaust air of two poultry houses was sampled by applying state-of-the-art filter sampling protocols. The two stables were identical except for one crucial difference, the presence or absence of an exhaust air cleaning system. In total, twenty-one exhaust air samples were collected at the two sites to monitor spectral differences caused by the cleaning device, and to follow changes in exhaust air characteristics during a fattening period. The total dust load was analyzed by gravimetric determination and included as a response variable in multivariate data analysis. The filter samples were directly measured with NIR spectroscopy. Principal component analysis (PCA), linear discriminant analysis (LDA), and factor analysis (FA) were effective in classifying the NIR exhaust air spectra according to fattening day and origin. The results indicate that the dust load and the composition of exhaust air (inorganic or organic matter) substantially influence the NIR spectral patterns. In conclusion, NIR spectroscopy as a tool is a promising and very rapid way to detect differences between exhaust air samples based on still not clearly defined circumstances triggered during a fattening period and the availability of an exhaust air cleaning system. Y1 - 2018 U6 - https://doi.org/10.1016/j.scitotenv.2018.02.072 SN - 0048-9697 VL - 630 SP - 536 EP - 543 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Droop, Philipp A1 - Chen, Shaohuang A1 - Radford, Melissa J. A1 - Paulßen, Elisabeth A1 - Gates, Byron D. A1 - Reilly, Raymond M. A1 - Radchenko, Valery A1 - Hoehr, Cornelia T1 - Synthesis of 197m/gHg labelled gold nanoparticles for targeted radionuclide therapy JF - Radiochimica Acta N2 - Meitner-Auger-electron emitters have a promising potential for targeted radionuclide therapy of cancer because of their short range and the high linear energy transfer of Meitner-Auger-electrons (MAE). One promising MAE candidate is 197m/gHg with its half-life of 23.8 h and 64.1 h, respectively, and high MAE yield. Gold nanoparticles (AuNPs) that are labelled with 197m/gHg could be a helpful tool for radiation treatment of glioblastoma multiforme when infused into the surgical cavity after resection to prevent recurrence. To produce such AuNPs, 197m/gHg was embedded into pristine AuNPs. Two different syntheses were tested starting from irradiated gold containing trace amounts of 197m/gHg. When sodium citrate was used as reducing agent, no 197m/gHg labelled AuNPs were formed, but with tannic acid, 197m/gHg labeled AuNPs were produced. The method was optimized by neutralizing the pH (pH = 7) of the Au/197m/gHg solution, which led to labelled AuNPs with a size of 12.3 ± 2.0 nm as measured by transmission electron microscopy. The labelled AuNPs had a concentration of 50 μg (gold)/mL with an activity of 151 ± 93 kBq/mL (197gHg, time corrected to the end of bombardment). KW - 197m/gHg KW - Gold nanoparticle (AuNP) KW - Meitner-Auger-electron (MAE) KW - Targeted radionuclide therapy (TRT) Y1 - 2023 U6 - https://doi.org/10.1515/ract-2023-0144 SN - 2193-3405 VL - 111 IS - 10 SP - 773 EP - 779 PB - De Gruyter CY - Berlin [u.a.] ER - TY - JOUR A1 - Dotzauer, Martin A1 - Pfeiffer, Diana A1 - Lauer, Markus A1 - Pohl, Marcel A1 - Mauky, Eric A1 - Bär, Katharina A1 - Sonnleitner, Matthias A1 - Zörner, Wilfried A1 - Hudde, Jessica A1 - Schwarz, Björn A1 - Faßauer, Burkhardt A1 - Dahmen, Markus A1 - Rieke, Christian A1 - Herbert, Johannes A1 - Thrän, Daniela T1 - How to measure flexibility – Performance indicators for demand driven power generation from biogas plants JF - Renewable Energy Y1 - 2019 U6 - https://doi.org/10.1016/j.renene.2018.10.021 SN - 0960-1481 SP - 135 EP - 146 PB - Elsevier CY - Amsterdam ER -