727 research outputs found
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Ergänzungsdaten zu: Tageslichtsimulation verlorener Gebäudezustände am Beispiel der Hagia Sophia Justinians
No full textData related to the doctoral disseration "Tageslichtsimulation verlorener Gebäudezustände am Beispiel der Hagia Sophia Justinians" including perspective images optimised in contrast for exemination on displays, graphics from the publication with respective data and raw simulation data and settings settings
ACSeg: Automated 3D Cytoplasm Segmentation in Soft X-Ray Tomography [Jurkat T cell data]
No full textThe structure of cells is a key to understanding cellular function, diagnosing diseases, and developing new treatments. Soft X-ray tomography is uniquely used to access 3D cellular structure of various cells at statistically significant sample sizes. These datasets are reconstructed 3D volumes obtained by soft X-ray tomography on Jurkat T cells. The data is organized in individual *.tif files
Tetraazacoronenes and Their Dimers, Trimers and Tetramers [data]
No full textTetraazacoronenes were synthesized from bay-functionalized tetraazaperylenes by Zr-mediated cyclization and four-fold Suzuki–Miyaura cross coupling. In the Zr-mediated approach, an η4-cyclobutadiene-zirconium(IV) complex was isolated as an intermediate to cyclobutene-annulated derivatives. Using bis(pinacolatoboryl)vinyltrimethylsilane as a C2 building block gave the tetraazacoronene target compound along with the condensed azacoronene dimer as well as higher oligomers. The series of extended azacoronenes show highly resolved UV/Vis absorption bands with increased extinction coefficients for the extended aromatic cores and fluorescence quantum yields of up to 80 % at 659 nm
Johannes Itten Linked Archive (JILA): offene semantische Forschungsdaten der Archivapplikation [research data]
No full textDieses Datenset enthält die offenen semantischen Daten, die der Linked-Open-Data-Applikation «Johannes Itten Linked Archive» zugrunde liegen. Die Wissensplattform ist als Sucheinstieg in den Nachlass des Bauhaus-Meisters und Schweizer Kunsttheoretikers Johannes Itten (1888-1967) konzipiert und basiert auf einem aus über 5200 Dokumentenseiten erschlossenen Personennetzwerk. Das Beziehungsnetz aus Personen und Nachlassdokumenten ist mit zusätzlichen Kontextinformationen angereichert.
Das Datenset enthält die archivarischen Erschliessungsinformationen aus der Zentralbibliothek Zürich, sowie die damit verknüpften biographischen Informationen aus externen Datenquellen wie der GND, Wikidata, dem SIKART Lexikon und dem Itten-Werkverzeichnis. Der gesamte Datensatz ist als RDF im Turtle und NQuad Format verfügbar
Stability of Shielded Pentacenes under Ambient Conditions [data]
No full textThe stabilization of pentacene through variation of substituents serves as a test bed to access stable organic semiconductors, transferable to the larger soluble acenes and azaacenes. Pentacene is stable enough for derivatization via wet-chemistry but sufficiently labile to test its (induced) (photo)decomposition. In this article, we describe the synthesis of shielded pentacenes, either via covalent jacketing with ester macrocycles or via steric shielding with biphenylyl substituents, together with attempts to access a bis(ortho-quaterphenyl) substituted Geländer pentacene. The photostability of the pentacenes is assessed under ambient conditions (air, light) to simulate handling under typical laboratory conditions and put into perspective with reference compounds, such as TIPS-ethynylated, ether-jacketed or our previously reported Geländer pentacenes
DNA microbeads for spatio-temporally controlled morphogen release within organoids [Research data]
No full textOrganoids have proven to be powerful in vitro model systems that mimic features of the corresponding tissue in vivo. However, across tissue types and species, organoids still often fail to reach full maturity and function because biochemical cues cannot be provided from within the organoid to guide their development. The establishment of such tools has been identified as a major goal of the field. Here, we introduce DNA microbeads as a novel tool for implementing spatio-temporally controlled morphogen gradients inside of organoids at any point in their life cycle. The DNA microbeads are formed in a simple one-pot process, they can be stored for a year and their stiffness and surface modification is tunable to mimic the corresponding tissue. Employing medaka retinal organoids and early embryos, we show that DNA microbeads can be integrated into embryos and organoids by microinjection and erased in a non-invasive manner with light. Coupling a recombinant surrogate Wnt to the DNA microbeads, we demonstrate the spatio-temporally controlled release of the morphogen from the microinjection site, which leads to morphogen gradients resulting in the formation of retinal pigmented epithelium (RPE) while maintaining retinal ganglion cells. The spatial localization of the induced RPE was shown to directly correlate with the DNA microbeads’ position. We were thus able to bioengineer retinal organoids to more closely mirror the cell type diversity of in vivo retinae. The DNA microbead technology can easily be adapted to other organoid applications for improved tissue mimicry
Responsive 3D printed microstructures based on collagen folding and unfolding [data]
No full textMimicking extracellular matrices holds great potential for tissue engineering in biological and biomedical applications. A key compound for mechanical stability of these matrices is collagen, which also plays an important role in many intra- and intercellular processes. Two-photon 3D laser printing offers structuring of these matrices with subcellular resolution. So far, efforts on 3D microprinting of collagen have been limited to simple geometries and customized set-ups. Herein, we present an easily accessible approach using a collagen type I methacrylamide (ColMA) ink system which can be stored at room temperature and be precisely printed using a commercial two-photon 3D laser printer. The formulation and printing parameters are carefully optimized enabling the manufacturing of defined 3D microstructures. Furthermore, these printed microstructures show a fully reversible response upon heating and cooling in multiple cycles, indicating successful collagen folding and unfolding. This experimental observation has been supported by molecular dynamics simulations. Thus, our study opens new perspectives for designing new responsive biomaterials for 4D (micro)printing
4D Printing of Shape Memory Polymers: From Macro to Micro [data]
No full textA novel and versatile shape memory ink system allowing 4D printing with light at the macroscale as well as the microscale is presented. Digital light processing (DLP) and direct laser writing (DLW) are selected as suitable 3D printing technologies to cover both regimes. First, a system based on monofunctional isobornyl acrylate and two crosslinkers consisting of a soft and a hard diacrylate is identified and proven to be compatible with both printing techniques. Employing DLP, a large variety of structures exhibiting distinct complexity is printed. These structures range from simple frames to more demanding 3D geometries such as double platform structures, infinity rings, or cubic grids. The shape memory effect is demonstrated for all the 3D geometries. Excellent shape fixity as well as recovery and repeatability is shown. Furthermore, the formulation is adapted for fast 4D printing at the microscale using DLW. Importantly, the 4D printed microstructures display remarkable shape memory properties. The possibility of trapping and releasing microobjects, such as microspheres, is ultimately demonstrated by designing, smart box-like 4D microstructures that can be thermally actuated—evidencing the versatility and potential of the reported system
Nanoscale flexible organic thin-film transistors [data]
No full textDirect-write electron-beam lithography has been used to fabricate low-voltage p-channel and n-channel organic thin-film transistors with channel lengths as small as 200 nm and gate-to-contact overlaps as small as 100 nm on glass and on flexible transparent polymeric substrates. The p-channel transistors have on/off current ratios as large as 4 × 109 and subthreshold swings as small as 70 mV/decade, and the n-channel transistors have on/off ratios up to 108 and subthreshold swings as low as 80 mV/decade. These are the largest on/off current ratios reported to date for nanoscale organic transistors. Inverters based on two p-channel transistors with a channel length of 200 nm and gate-to-contact overlaps of 100 nm display characteristic switching-delay time constants between 80 and 40 ns at supply voltages between 1 and 2 V, corresponding to a supply voltage–normalized frequency of about 6 MHz/V. This is the highest voltage-normalized dynamic performance reported to date for organic transistors fabricated by maskless lithography
Astronomische Grundlagen für den Kalender 2026 [Datensatz]
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