Research Data Repository of Saxon Universities
OPARA is the Open Access Repository and Archive for Research Data of Saxon Universities.
Researchers of Saxon Universities can either publish their research data on OPARA, or archive it here to comply with requirements of funding acencies and good scientic practice, without public access.
You can find the documentation of this service at the OPARA manual websites. If you need suppourt using OPARA please contact the Servicedesk of TU Dresden.
Communities in OPARA
Select a community to browse its collections.
Recent Submissions
Localized actin cortex perturbation generates cell-scale membrane tension gradients
(Technische Universität Dresden, 2026-10-27) Panda, Yogishree Arabinda
Membrane tension is a key mechanical regulator of cell signaling, morphology, and division. Whether cells can sustain spatial gradients in membrane tension, or whether such asymmetries are rapidly dissipated by long-range tension propagation, remains actively debated. Here, we use the tension-sensitive fluorescent probe FliptR to directly measure changes in in-plane membrane tension following localized optogenetic activation of RhoA in mitotic HeLa cells. We find that local RhoA activation induces a sustained, cell-scale gradient in FliptR lifetime, consistent with a cell-scale in-plane membrane tension gradient and tension elevation on the non-activated side. This gradient depends on an intact actin and microtubule cytoskeleton and is accompanied by polarized cytoskeletal remodeling, with cortical F-actin enrichment at the activation site and asymmetric microtubule growth on the opposite side. AFM tether-force measurements reveal increased tether forces at the activated side, indicating locally enhanced membrane–cortex coupling. A coarse-grained membrane chemical-potential model explains how spatially heterogeneous membrane–cortex coupling can maintain such gradients. Together, our findings show that cells can actively generate and sustain spatially patterned mechanical states through localized cytoskeletal signaling.
Data corresponding to: Confirmation of complex non-collinear Fe(II) spin ordering in the iron oxychalcogenide La2O2Fe2OSe2 by broad range 139La-NQR
(Technische Universität Dresden, 2026-10-27) Weinhold, Tillmann; Seewald, Felix; Herrmann, Cornelius
The dataset contains NMR/NQR and Mössbauer data that is presented in Confirmation of complex non-collinear Fe(II) spin ordering in the iron oxychalcogenide La2O2Fe2OSe2 by broad range 139La-NQR.
FOR 3010: Thermal Expansion and Phase Transformation up to 1200 °C of Metastable Aluminas Produced by Flame Spraying
(Technische Universität Bergakademie Freiberg, 2026-10-27) Zienert, Tilo; Aneziris, Christos G.
The transition aluminas δ1 and the cubic, non-spinel-type η-Al2O3 were detected in addition to α-Al2O3 in flame-sprayed material. Their transitions from room temperature up to 1200 °C were investigated by high-temperature XRD measurements. Structural changes with time and temperature were observed for all transition aluminas (η-, δ1- and θ-Al2O3). The phases followed the expected transition sequence of η→δ1→θ→α and showed mainly linear, temperature-independent transition rates. Based on the determined thermal expansion of the phases, it is proposed that the metastable transitions are at least partly mechanically induced. In addition, a second-order phase transition from η→θ might be indicated around 1050–1075 °C by the determined trends of density.
FOR 3010: Thermal Expansion of Electrofused MgO-Based Spinel Systems Containing Fe2O3, Al2O3-Fe2O3, Al2O3-Cr2O3-Fe2O3 and Al2O3-NiO-Fe2O3
(Technische Universität Bergakademie Freiberg, 2026-10-27) Zienert, Tilo; Borges, Otavio H.; Pandolfelli, Victor C.; Aneziris, Christos C.
Magnesia-spinel multicomponent materials have been used as refractories for a long time. In addition to a few binary systems, the influence of spinel phases on the thermal expansion (α) of MgO or the resulting compound has not been studied so far. As α is critical for refractories in application, this work investigates the thermal expansion of complex MgO-based spinel systems using X-ray diffraction (XRD) in combination with Rietveld refinement in the temperature range between 30 °C and 1200 °C. All studied periclase solid solutions, in contact with spinels of the systems Mg1.01(Al0.23Cr1.64Fe0.13)O4, Fe3O4–MgFe2O4, NiFe2O4–NiAl2O4, MgAl2O4–MgFe2O4, Fe3O4–FeAl2O4 and Fe3O4 · NiFe2O4 ·2 MgAl2O4 showed α trends below plain MgO, or even decreasing values above 1000 °C. Many spinels showed large negative thermal expansion coefficients. It was found that the structural change in spinels is constrained, leading to a common analytical expression to calculate the lattice parameter of spinels with temperature, which was used to study the nature of the investigated spinels in more detail. The work highlights that Cr-free MgO-spinel systems show similar or even better high-temperature behaviour than commonly used magnesia–chrome aggregates.
Quellcode und Datenmodell der Forschungsdatenbank Schwingfestigkeitsversuche für Wellen und Welle-Nabe-Verbindungen
(Technische Universität Dresden, 2026-10-23) Becker, Nils
Der vorliegende Datensatz beinhaltet den Quellcode der Datenbankanwendung (Quellcode.zip), das zugehörige Datenmodell in unterschiedlichen Formaten und ein Backup der Datenbank mit vorliegenden Daten aus mehreren Forschungsprojekten zum Stand Februar 2026. Der Quellcode kann zum Aufsetzen der Datenbankanwendung genutzt werden, anschließend kann das Backup der Datenbank bei Bedarf eingespielt werden.