@article{50352,
author = {{Kolbaum, AE and Jung, C and Jaeger, A and Libuda, Lars and Lindtner, O}},
issn = {{0278-6915}},
journal = {{Food Chem Toxicol}},
pages = {{114404}},
title = {{{Assessment of long-term dietary cadmium exposure in children in Germany: Does consideration of data from total diet studies reduce uncertainties from food monitoring programmes?}}},
volume = {{184}},
year = {{2023}},
}
@misc{50347,
abstract = {{Um die Selbstwahrnehmung motorischer Basiskompetenzen bei Kindern der 1. und 2. Klasse zu erfassen, wurde ein illustriertes Instrument entwickelt. Das Instrument orientiert sich am MOBAK-1-2 Instrument, mit welchem die motorischen Basiskompetenzen von Kindern getestet werden. Das Manual enthält die Instruktionen sowie die illustrieren Antwortoptionen und Testaufgaben.}},
author = {{Bretz, Kathrin and Strotmeyer, Anne and Herrmann, Christian}},
publisher = {{LibreCat University}},
title = {{{SEMOK-1-2: Selbstwahrnehmung motorischer Basiskompetenzen in der ersten und zweiten Primarschulklasse. Manual}}},
doi = {{10.5281/ZENODO.10130100}},
year = {{2023}},
}
@phdthesis{50731,
abstract = {{Eine Forderung nach evidenzbasierter Praxis (EBP) im Bildungswesen kann sowohl vor dem Hintergrund der Bedeutung wissenschaftlicher Evidenzen innerhalb gesellschaftlicher Diskurse als auch der Evidenzbasierung in anderen Bereichen formuliert werden. Der Umgang mit und die Bewertung von Evidenzen stellen somit vor dem Hintergrund epistemologischer Überzeugungen relevante Aufgaben für den Chemieunterricht dar. Dabei ist unklar, inwiefern (angehende) Lehrkräfte über Kompetenzen in EBP verfügen. Bestehende Studien weisen auf einen Bedarf der fachdidaktischen Analyse und Förderung von Kompetenzen in EBP bei angehenden Lehrkräften hin.Im Rahmen dieser Dissertation wurde die Domänenspezifität der Kompetenzen in EBP sowie deren Förderung in einem fachdidaktischen Kontext untersucht. Dabei wurde ein weiterer Schwerpunkt auf den Umgang mit anomalen Beobachtungen im Sinne widersprüchlicher Evidenzen gelegt. Innerhalb von drei Teilstudien wurden unterschiedliche methodische Zugänge zur Kompetenz in EBP auf Grundlage epistemologischer Überzeugungen gewählt.Die Ergebnisse weisen auf einen Förderbedarf der Kompetenz in EBP für angehende Lehrkräfte aller Unterrichtsfächer hin. Eine entwickelte Intervention für angehende Chemielehrkräfte weist eine Wirksamkeit zur Förderung von Kompetenzen in EBP auf. Im Rahmen einer Modellierungsstudie kann der Einfluss von Fachwissen sowie Indizien für einen Einfluss epistemologischer Überzeugungen auf den Umgang mit anomalen Beobachtungen gezeigt werden.}},
author = {{Pollmeier, Pascal}},
keywords = {{Epistemologie, Evidenzen, evidence-based practice}},
pages = {{357}},
publisher = {{Universität Paderborn}},
title = {{{Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung}}},
doi = {{10.17619/UNIPB/1-1869}},
year = {{2023}},
}
@techreport{50741,
abstract = {{Zitieren als:
Wissenschaftlicher Beirat für Agrarpolitik, Ernährung und gesundheitlichen Verbraucher-
schutz beim BMEL (2023): Neue Sorgfaltspflichten für Unternehmen des Agrar- und
Ernährungssektors: Empfehlungen zu aktuellen Gesetzesentwicklungen. Gutachten. Berlin.}},
author = {{Spiller, Achim and Nieberg, Hiltrud and Renner, Britta and Balmann, Alfons and Birna, Regina and Bosy-Westphal, Anja and Buyken, Anette and Döring, Thomas and Feindt, Peter and Götz, Kai-Uwe and Linseisen, Jakob and Nöthlings, Ute and Martínes, José and Pischetsrieder, Monika and Voget-Kleschin, Lieske and Weingarten, Peter and Wesseler, Justus and Wieck, Christine}},
publisher = {{Wissenschaftlicher Beirat für Agrarpolitik, Ernährung und gesundheitlichen Verbraucherschutz beim BMEL}},
title = {{{Neue Sorgfaltspflichten für Unternehmen des Agrar- und Ernährungssektors: Empfehlungen zu aktuellen Gesetzesentwicklungen}}},
year = {{2023}},
}
@article{46023,
abstract = {{This article presents the potential-dependent adsorption of two proteins, bovine serum albumin (BSA) and lysozyme (LYZ), on Ti6Al4V alloy at pH 7.4 and 37 °C. The adsorption process was studied on an electropolished alloy under cathodic and anodic overpotentials, compared to the open circuit potential (OCP). To analyze the adsorption process, various complementary interface analytical techniques were employed, including PM-IRRAS (polarization-modulation infrared reflection-absorption spectroscopy), AFM (atomic force microscopy), XPS (X-ray photoelectron spectroscopy), and E-QCM (electrochemical quartz crystal microbalance) measurements. The polarization experiments were conducted within a potential range where charging of the electric double layer dominates, and Faradaic currents can be disregarded. The findings highlight the significant influence of the interfacial charge distribution on the adsorption of BSA and LYZ onto the alloy surface. Furthermore, electrochemical analysis of the protein layers formed under applied overpotentials demonstrated improved corrosion protection properties. These studies provide valuable insights into protein adsorption on titanium alloys under physiological conditions, characterized by varying potentials of the passive alloy.}},
author = {{Duderija, Belma and González-Orive, Alejandro and Ebbert, Christoph and Neßlinger, Vanessa and Keller, Adrian and Grundmeier, Guido}},
issn = {{1420-3049}},
journal = {{Molecules}},
keywords = {{Chemistry (miscellaneous), Analytical Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Molecular Medicine, Drug Discovery, Pharmaceutical Science}},
number = {{13}},
publisher = {{MDPI AG}},
title = {{{Electrode Potential-Dependent Studies of Protein Adsorption on Ti6Al4V Alloy}}},
doi = {{10.3390/molecules28135109}},
volume = {{28}},
year = {{2023}},
}
@article{51167,
author = {{Duderija, B. and Sahin, F. and Meinderink, D. and Calderón-Gómez, J.C. and Schmidt, H.C. and Homberg, W. and Grundmeier, G. and González-Orive, A.}},
issn = {{2666-3309}},
journal = {{Journal of Advanced Joining Processes}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
publisher = {{Elsevier BV}},
title = {{{Electropolymerization of acrylic acid on steel for enhanced joining by plastic deformation}}},
doi = {{10.1016/j.jajp.2023.100181}},
volume = {{9}},
year = {{2023}},
}
@article{45598,
author = {{Meier, Heiko and Sennefelder, Lisa}},
journal = {{markt&wirtschaft}},
number = {{6}},
pages = {{32--33}},
publisher = {{PBL Media Verlag}},
title = {{{Gesundheitsmanagement: Gesunde Mitarbeiter - gesunder Betrieb?}}},
year = {{2023}},
}
@inproceedings{47527,
author = {{Sennefelder, Lisa}},
location = {{Bochum}},
title = {{{Sportliche Angebote zur Förderung von Vertrauen in öffentlichen Verwaltungen}}},
year = {{2023}},
}
@article{52122,
author = {{Ali, Usman and Holthaus, Martin and Meier, Torsten}},
issn = {{2643-1564}},
journal = {{Physical Review Research}},
keywords = {{General Physics and Astronomy}},
number = {{4}},
publisher = {{American Physical Society (APS)}},
title = {{{Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice}}},
doi = {{10.1103/physrevresearch.5.043152}},
volume = {{5}},
year = {{2023}},
}
@misc{46779,
author = {{Sennefelder, Lisa}},
booktitle = {{Sport und Gesellschaft}},
number = {{3}},
pages = {{319--323 }},
title = {{{Rezension zu: Bette, K.-H. & Kühnle, F.: Flitzer im Sport – Zur Sozialfigur des Störenfrieds}}},
volume = {{20}},
year = {{2023}},
}
@article{52345,
abstract = {{Photoactive chromium(III) complexes saw a conceptual breakthrough with the discovery of the prototypical molecular ruby mer-[Cr(ddpd)2]3+ (ddpd = N,N′-dimethyl-N,N′-dipyridin-2-ylpyridine-2,6-diamine), which shows intense long-lived near-infrared (NIR) phosphorescence from metal-centered spin-flip states. In contrast to the numerous studies on chromium(III) photophysics, only 10 luminescent molybdenum(III) complexes have been reported so far. Here, we present the synthesis and characterization of mer-MoX3(ddpd) (1, X = Cl; 2, X = Br) and cisfac-[Mo(ddpd)2]3+ (cisfac-[3]3+), an isomeric heavy homologue of the prototypical molecular ruby. For cisfac-[3]3+, we found strong zero-field splitting using magnetic susceptibility measurements and electron paramagnetic resonance spectroscopy. Electronic spectra covering the spin-forbidden transitions show that the spin-flip states in mer-1, mer-2, and cisfac-[3]3+ are much lower in energy than those in comparable chromium(III) compounds. While all three complexes show weak spin-flip phosphorescence in NIR-II, the emission of cisfac-[3]3+ peaking at 1550 nm is particularly low in energy. Femtosecond transient absorption spectroscopy reveals a short excited-state lifetime of 1.4 ns, 6 orders of magnitude shorter than that of mer-[Cr(ddpd)2]3+. Using density functional theory and ab initio multireference calculations, we break down the reasons for this disparity and derive principles for the design of future stable photoactive molybdenum(III) complexes.}},
author = {{Kitzmann, Winald R. and Hunger, David and Reponen, Antti-Pekka M. and Förster, Christoph and Schoch, Roland and Bauer, Matthias and Feldmann, Sascha and van Slageren, Joris and Heinze, Katja}},
issn = {{0020-1669}},
journal = {{Inorganic Chemistry}},
keywords = {{Inorganic Chemistry, Physical and Theoretical Chemistry}},
number = {{39}},
pages = {{15797--15808}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Electronic Structure and Excited-State Dynamics of the NIR-II Emissive Molybdenum(III) Analogue to the Molecular Ruby}}},
doi = {{10.1021/acs.inorgchem.3c02186}},
volume = {{62}},
year = {{2023}},
}
@article{52358,
author = {{Diederich, Malte and Spatz, Verena and Bauer, Anna Brigitte}},
journal = {{Phydid B, Didaktik der Physik, Beiträge zur DPG-Frühjahrstagung (2022)}},
title = {{{Auswirkungen einer Online-Intervention (Mindset, Lerntechniken) auf den Studieneinstieg}}},
year = {{2023}},
}
@article{52542,
abstract = {{AbstractWe report on so‐called “hidden FLPs” (FLP: frustrated Lewis pair) consisting of a phosphorus ylide featuring a group 13 fragment in the ortho position of a phenyl ring scaffold to form five‐membered ring structures. Although the formation of the Lewis acid/base adducts was observed in the solid state, most of the title compounds readily react with carbon dioxide to provide stable insertion products. Strikingly, 0.3–3.0 mol% of the reported aluminum and gallium/carbon‐based ambiphiles catalyze the reduction of CO2 to methanol with satisfactory high selectivity and yields using pinacol borane as stoichiometric reduction equivalent. Comprehensive computational studies provided valuable mechanistic insights and shed more light on activity differences.}},
author = {{Krämer, Felix and Paradies, Jan and Fernández, Israel and Breher, Frank}},
issn = {{0947-6539}},
journal = {{Chemistry – A European Journal}},
keywords = {{General Chemistry, Catalysis, Organic Chemistry}},
number = {{5}},
publisher = {{Wiley}},
title = {{{Quo Vadis CO2 Activation: Catalytic Reduction of CO2 to Methanol Using Aluminum and Gallium/Carbon‐based Ambiphiles}}},
doi = {{10.1002/chem.202303380}},
volume = {{30}},
year = {{2023}},
}
@article{53170,
abstract = {{AbstractCoating medical implants with antibacterial polymers may prevent postoperative infections which are a common issue for conventional titanium implants and can even lead to implant failure. Easily applicable diblock copolymers are presented that form polymer brushes via “grafting to” mechanism on titanium and equip the modified material with antibacterial properties. The polymers carry quaternized pyridinium units to combat bacteria and phosphonic acid groups which allow the linear chains to be anchored to metal surfaces in a convenient coating process. The polymers are synthesized via reversible‐addition‐fragmentation‐chain‐transfer (RAFT) polymerization and postmodifications and are characterized using NMR spectroscopy and SEC. Low grafting densities are a major drawback of the “grafting to” approach compared to “grafting from”. Thus, the number of phosphonic acid groups in the anchor block are varied to investigate and optimize the surface binding. Modified titanium surfaces are examined regarding their composition, wetting behavior, streaming potential, and coating stability. Evaluation of the antimicrobial properties revealed reduced bacterial adhesion and biofilm formation for certain polymers, albeit the cell biocompatibility against human gingival fibroblasts is also impaired. The presented findings show the potential of easy‐to‐apply polymer coatings and aid in designing next‐generation implant surface modifications.}},
author = {{Methling, Rafael and Dückmann, Oliver and Simon, Frank and Wolf‐Brandstetter, Cornelia and Kuckling, Dirk}},
issn = {{1438-7492}},
journal = {{Macromolecular Materials and Engineering}},
keywords = {{Materials Chemistry, Polymers and Plastics, Organic Chemistry, General Chemical Engineering}},
number = {{8}},
publisher = {{Wiley}},
title = {{{Antimicrobial Brushes on Titanium via “Grafting to” Using Phosphonic Acid/Pyridinium Containing Block Copolymers}}},
doi = {{10.1002/mame.202200665}},
volume = {{308}},
year = {{2023}},
}
@article{53166,
abstract = {{The Knoevenagel reaction is a classic reaction in organic chemistry for the formation of C-C bonds. In this study, various catalytic monomers for Knoevenagel reactions were synthesized and polymerized via photolithography to form polymeric gel dots with a composition of 90% catalyst, 9% gelling agent and 1% crosslinker. Furthermore, these gel dots were inserted into a microfluidic reactor (MFR) and the conversion of the reaction using gel dots as catalysts in the MFR for 8 h at room temperature was studied. The gel dots containing primary amines showed a better conversion of about 83–90% with aliphatic aldehyde and 86–100% with aromatic aldehyde, compared to the tertiary amines (52–59% with aliphatic aldehyde and 77–93% with aromatic aldehydes) which resembles the reactivity of the amines. Moreover, the addition of polar solvent (water) in the reaction mixture and the swelling properties of the gel dots by altering the polymer backbone showed a significant enhancement in the conversion of the reaction, due to the increased accessibility of the catalytic sites in the polymeric network. These results suggested the primary-amine-based catalysts facilitate better conversion compared to tertiary amines and the reaction solvent had a significant influence on organocatalysis to improve the efficiency of MFR.}},
author = {{Killi, Naresh and Bartenbach, Julian and Kuckling, Dirk}},
issn = {{2310-2861}},
journal = {{Gels}},
keywords = {{Knoevenagel reaction, organocatalysis, polymeric gel dots, microfluidic reactions, polymeric networks}},
number = {{3}},
publisher = {{MDPI AG}},
title = {{{Polymeric Networks Containing Amine Derivatives as Organocatalysts for Knoevenagel Reaction within Continuously Driven Microfluidic Reactors}}},
doi = {{10.3390/gels9030171}},
volume = {{9}},
year = {{2023}},
}
@phdthesis{53434,
abstract = {{Im Rahmen dieser Dissertation wurden Katalysatoren, welche auf der thermischen Zersetzung von metallorganischen Gerüstverbindungen basieren, mittels Röntgenabsorptionsspektroskopie (XAS) und Röntgenemissionsspektroskopie (XES) untersucht. Durch diesen synthetischen Ansatz können hochdisperse Ni-basierte Katalysatoren eingebettet in einer Kohlenstoffmatrix gewonnen werden, welche für die Methanisierung von CO2 Einsatz finden. Diese sollen eine hohe Stabilität gegenüber Wasserstoffausfällen aufweisen, welche bedingt durch Wetterfluktuationen in der Gewinnung von grünem Wasserstoff auftreten. Um ein derartiges System gezielt gestalten zu können, ist ein detailliertes Verständnis zugrundeliegender chemischer Mechanismen und damit einhergehend elektronischer Strukturen der Katalysatorsysteme notwendig. Durch die detaillierte Analyse der Katalysator-Vorstufen mittels XAS konnte gezeigt werden, dass auch unter reduktiven Bedingungen in der thermischen Zersetzung Spuren von Ni(II) vorliegen und keine reine Nifcc-Struktur erreicht werden konnte. Eine detaillierte Auswertung der gleichen Präkatalysatoren mittels XES konnte durch eine neuartige Kombination von HERFD-XANES, theoretischer Berechnungen und VtC-XES einen eindeutigen Beweis für das Vorhandensein der gewünschten Kohlenstoffmatrix sowie Spuren von NiO im Präkatalysator liefern, welche sich vorteilhaft auf die spätere Aktivität im finalen Katalysator auswirken. Abschließend konnte mittels einer in-situ Untersuchung der Temperaturbereich, in dem sich die aktive Katalysatorspezies ausbildet, auf 80 bis 200 C eingegrenzt werden. Schließlich konnte ein eindeutiger Zusammenhang zwischen dem Verlust einer stabilisierenden Kohlenstoffschicht und einem Rückgang der Aktivität belegt werden.}},
author = {{Strübbe, Sven}},
pages = {{198}},
publisher = {{Universitätsbibliothek Paderborn}},
title = {{{Investigations of Ni-based methanation catalysts under dynamic conditions via hard X-ray spectroscopy}}},
doi = {{10.17619/UNIPB/1-1752}},
year = {{2023}},
}
@article{49607,
abstract = {{In this work, we utilize thin dielectric meta-atoms placed on a silver substrate to efficiently enhance and manipulate the third-harmonic generation. We theoretically and experimentally reveal that when the structural symmetry of the meta-atom is incompatible with the lattice symmetry of an array, some generalized nonlinear geometric phases appear, which offers new possibilities for harmonic generation control beyond the accessible symmetries governed by the selection rule. The underlying mechanism is attributed to the modified rotation of the effective principal axis of a dense meta-atom array, where the strong coupling among the units gives rise to a generalized linear geometric phase modulation of the pump light. Therefore, nonlinear geometric phases carried by third-harmonic emissions are the natural result of the wave-mixing process among the modes excited at the fundamental frequency. This mechanism further points out a new strategy to predict the nonlinear geometric phases delivered by the nanostructures according to their linear responses. Our design is simple and efficient and offers alternatives for the nonlinear meta-devices that are capable of flexible photon generation and manipulation.}},
author = {{Liu, Bingyi and Geromel, René and Su, Zhaoxian and Guo, Kai and Wang, Yongtian and Guo, Zhongyi and Huang, Lingling and Zentgraf, Thomas}},
issn = {{2330-4022}},
journal = {{ACS Photonics}},
keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials}},
number = {{12}},
pages = {{4357--4366}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design}}},
doi = {{10.1021/acsphotonics.3c01163}},
volume = {{10}},
year = {{2023}},
}
@article{53568,
author = {{Weiler, David and Burde , Jan-Philipp and Große-Heilmann, Rike Isabel and Riese, Josef and Schubatzky, Thomas}},
issn = {{1606-3015}},
journal = {{Plus Lucis}},
number = {{3}},
pages = {{4 -- 8}},
title = {{{Einsatzmöglichkeiten von digitalen Medien im Physikunterricht - eine Übersicht}}},
year = {{2023}},
}
@article{52344,
abstract = {{Macrocyclization reactions are still challenging due to competing oligomerization, which requires the use of small substrate concentrations. Here, the cationic tungsten imido and tungsten oxo alkylidene N-heterocyclic carbene complexes [[W(N-2,6-Cl2-C6H3)(CHCMe2Ph(OC6F5)(pivalonitrile)(IMes)+ B(ArF)4−] (W1) and [W(O)(CHCMe2Ph(OCMe(CF3)2)(IMes)(CH3CN)+ B(ArF)4−] (W2) (IMes=1,3-dimesitylimidazol-2-ylidene; B(ArF)4−=tetrakis(3,5-bis(trifluoromethyl)phenyl borate) have been immobilized inside the pores of ordered mesoporous silica (OMS) with pore diameters of 3.3 and 6.8 nm, respectively, using a pore-selective immobilization protocol. X-ray absorption spectroscopy of W1@OMS showed that even though the catalyst structure is contracted due to confinement by the mesopores, both the oxidation state and structure of the catalyst stayed intact upon immobilization. Catalytic testing with four differently sized α,ω-dienes revealed a dramatically increased macrocyclization (MC) and Z-selectivity of the supported catalysts compared to the homogenous progenitors, allowing high substrate concentrations of 25 mM. With the supported complexes, a maximum increase in MC-selectivity from 27 to 81 % and in Z-selectivity from 17 to 34 % was achieved. In general, smaller mesopores exhibited a stronger confinement effect. A comparison of the two supported tungsten-based catalysts showed that W1@OMS possesses a higher MC-selectivity, while W2@OMS exhibits a higher Z-selectivity which can be rationalized by the structures of the catalysts.}},
author = {{Ziegler, Felix and Bruckner, Johanna R. and Nowakowski, Michał and Bauer, Matthias and Probst, Patrick and Atwi, Boshra and Buchmeiser, Michael R.}},
issn = {{1867-3880}},
journal = {{ChemCatChem}},
keywords = {{Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis}},
number = {{21}},
publisher = {{Wiley}},
title = {{{Macrocyclization of Dienes under Confinement with Cationic Tungsten Imido/Oxo Alkylidene N‐Heterocyclic Carbene Complexes}}},
doi = {{10.1002/cctc.202300871}},
volume = {{15}},
year = {{2023}},
}
@article{42679,
abstract = {{The Saharan desert ant Cataglyphis bombycina is densely covered with shiny silver setae (hair-like structures). Their appearance was explained by geometric optics and total internal reflection. The setae also increase the emissivity of the ant, as they form an effective medium. This work provides additional data on microstructural details of the setae that are used to simulate the scattering of an individual seta to explain their influence on the optical properties. This is achieved by characterization of their structure using light microscopy and scanning/transmission electron microscopy. How the microstructural features influence scattering is investigated wave-optically within the limits of finite-difference time-domain simulations from the ultraviolet to the mid-infrared spectral range to elucidate the optical effects beyond ray optics and effective medium theory. The results show that Mie scattering plays an important role in protecting the ant from solar radiation and could be relevant for its thermal tolerance.}},
author = {{Schwind, Bertram and Wu, Xia and Tiemann, Michael and Fabritius, Helge-Otto}},
issn = {{0740-3224}},
journal = {{Journal of the Optical Society of America B}},
keywords = {{Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics}},
number = {{3}},
pages = {{B49 -- B58}},
publisher = {{Optica Publishing Group}},
title = {{{Broadband Mie scattering effects by structural features of setae from the Saharan silver ant Cataglyphis bombycina}}},
doi = {{10.1364/josab.474899}},
volume = {{40}},
year = {{2023}},
}