4,488 results match your criteria: "Graz University of Technology.[Affiliation]"

Adhesion between solid materials is caused by intermolecular forces that only take place if the adhering surfaces are at nanoscale contact (NSC) (i.e., 0.

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Safety assessment for autonomous vehicles: A reference driver model for highway merging scenarios.

Accid Anal Prev

October 2024

State Key Laboratory of Automotive Simulation and Control, Jilin University, Jilin, 130025, China. Electronic address:

Driver models are crucial for the safety assessment of autonomous vehicles (AVs) because of their role as reference models. Specifically, an AV is expected to achieve at least the same level of safety performance as a careful and competent driver model. To make this comparison possible, quantitative modeling of careful and competent driver models is essential.

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  • Transmission spectroscopy has been an essential method for studying exoplanet atmospheres, but recent studies question the assumption that the atmosphere is uniform, particularly for heated gas giants like WASP-39 b.
  • Using the James Webb Space Telescope, researchers detected differences in the morning and evening transmission spectra of WASP-39 b, finding that the evening spectra had significantly larger transit depths compared to the morning ones.
  • The findings suggest that the evening terminator is hotter and possibly clearer than the morning terminator, leading to implications about atmospheric circulation and cloud formation on the exoplanet.
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  • Improvement of photosynthesis requires understanding how electrons are distributed under different conditions, which was studied in the engineered cyanobacterium Synechocystis sp. PCC 6803 expressing a gene for an enzyme that converts substrates into products using photosynthetically produced NAD(P)H.
  • The research found that strong artificial electron sinks can outperform natural mechanisms, revealing that the pathway through ferredoxin-NAD(P)H-oxidoreductase is more effective for transferring photosynthetic electrons.
  • Key findings highlight the importance of the NADPH/NADP+ ratio in regulating electron flow, suggesting that recognizing energy bottlenecks in engineered systems is vital for enhancing photosynthetic processes for sustainable production.
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Monitoring the strain in the rotating flywheel in a kinetic energy storage system is important for safe operation and for the investigation of long-term effects in composite materials like carbon-fiber-reinforced plastics. An optoelectronic strain-measurement system for contactless deformation and position monitoring of a flywheel was investigated. The system consists of multiple optical sensors measuring the local relative in-plane displacement of the flywheel rotor.

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This paper introduces the HEX (High-pressure Elemental Xstals) database, a complete database of the ground-state crystal structures of the first 57 elements of the periodic table, from H to La, at 0, 100, 200 and 300 GPa. HEX aims to provide a unified reference for high-pressure research, by compiling all available experimental information on elements at high pressure, and complementing it with the results of accurate evolutionary crystal structure prediction runs based on Density Functional Theory. Besides offering a much-needed reference, our work also serves as a benchmark of the accuracy of current ab-initio methods for crystal structure prediction.

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Accident analyses repeatedly reported the considerable contribution of run-off-road incidents to fatalities in road traffic, and despite considerable advances in assistive technologies to mitigate devastating consequences, little insight into the drivers' brain response during such accident scenarios has been gained. While various literature documents neural correlates to steering motion, the driver's mental state, and the impact of distraction and fatigue on driving performance, the cortical substrate of continuous deviations of a car from the road - i.e.

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Quite recently we discovered that copper(II) complexes with isomeric morpholine-thiosemicarbazone hybrid ligands show good cytotoxicity in cancer cells and that the molecular target responsible for this activity might be tubulin. In order to obtain better lead drug candidates, we opted to exploit the power of coordination chemistry to (i) assemble structures with globular shape to better fit the colchicine pocket and (ii) vary the metal ion. We report the synthesis and full characterization of bis-ligand cobalt(III) and iron(III) complexes with 6-morpholinomethyl-2-formylpyridine 4-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (HL1), 6-morpholinomethyl-2-acetylpyridine 4-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (HL2), and 6-morpholinomethyl-2-formylpyridine 4-phenyl-3-thiosemicarbazone (HL3), and -ligand nickel(II), zinc(II) and palladium(II) complexes with HL1, namely [Co(HL)(L)](NO) (1), [Co(HL)(L)](NO) (2), [Co(HL)(L)](NO) (3), [Fe(L)]NO (4), [Fe(HL)(L)](NO) (5), [Ni(L)]Cl (6), [Zn(L)Cl] (7) and [Pd(HL)Cl]Cl (8).

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Traditionally, developing inhaled drug formulations relied on trial and error, yet recent technological advancements have deepened the understanding of 'inhalation biopharmaceutics' i.e. the processes that occur to influence the rate and extent of drug exposure in the lungs.

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Degenerative mitral valve disease is a common valvular disease with two arguably distinct phenotypes: fibroelastic deficiency and Barlow's disease. These phenotypes significantly alter the microstructures of the leaflets, particularly the collagen fibers, which are the main mechanical load carriers. The predominant method of investigation is histological sections.

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Films based on TEMPO-oxidized chitosan nanoparticles: Obtaining and potential application as wound dressings.

Carbohydr Res

August 2024

Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia. Electronic address:

A series of novel films based on TEMPO-oxidized chitosan nanoparticles were prepared by casting method. Fourier transform infrared spectroscopy (FTIR) was employed to ascertain the chemical structure of TEMPO-oxidized chitosan. The surface morphology of the TEMPO-oxidized chitosan nanoparticles was analyzed by atomic force microscopy (AFM).

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Hi-C and micro-C sequencing have shed light on the profound importance of 3D genome organization in cellular function by probing 3D contact frequencies across the linear genome. The resulting contact matrices are extremely sparse and susceptible to technical- and sequence-based biases, making their comparison challenging. The development of reliable, robust and efficient methods for quantifying similarity between contact matrices is crucial for investigating variations in the 3D genome organization in different cell types or under different conditions, as well as evaluating experimental reproducibility.

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Process Analytical Technology (PAT) has revolutionized pharmaceutical manufacturing by providing real-time monitoring and control capabilities throughout the production process. This review paper comprehensively examines the application of PAT methodologies specifically in the production of solid active pharmaceutical ingredients (APIs). Beginning with an overview of PAT principles and objectives, the paper explores the integration of advanced analytical techniques such as spectroscopy, imaging modalities and others into solid API substance production processes.

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dMAD7 is a promising tool for targeted gene regulation in the methylotrophic yeast Komagataella phaffii.

N Biotechnol

November 2024

Christian Doppler Laboratory for Innovative Pichia pastoris Host and Vector Systems, Graz, Austria; Institute of Molecular Biotechnology, Graz University of Technology, Graz, Austria.

The methylotrophic yeast Komagataella phaffii is a popular host system for the pharmaceutical and biotechnological production of recombinant proteins. CRISPR-Cas9 and its derivative CRISPR interference (CRISPRi) offer a promising avenue to further enhance and exploit the full capabilities of this host. MAD7 and its catalytically inactive variant "dead" MAD7 (dMAD7) represent an interesting alternative to established CRISPR-Cas9 systems and are free to use for industrial and academic research.

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pyCEPS: A cross-platform electroanatomic mapping data to computational model conversion platform for the calibration of digital twin models of cardiac electrophysiology.

Comput Methods Programs Biomed

September 2024

Gottfried Schatz Research Center, Division of Medical Physics and Biophysics, Medical University of Graz, Graz, Austria; NumeriCor GmbH, Graz, Austria; BioTechMed-Graz, Graz, Austria. Electronic address:

Background And Objective: Data from electro-anatomical mapping (EAM) systems are playing an increasingly important role in computational modeling studies for the patient-specific calibration of digital twin models. However, data exported from commercial EAM systems are challenging to access and parse. Converting to data formats that are easily amenable to be viewed and analyzed with commonly used cardiac simulation software tools such as openCARP remains challenging.

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Films and patterns of 3D-oriented metal-organic frameworks (MOFs) afford well-ordered pore structures extending across centimeter-scale areas. These macroscopic domains of aligned pores are pivotal to enhance diffusion along specific pathways and orient functional guests. The anisotropic properties emerging from this alignment are beneficial for applications in ion conductivity and photonics.

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Discovery, characterization, and comparative analysis of new UGT72 and UGT84 family glycosyltransferases.

Commun Chem

June 2024

Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Petersgasse 12/1, 8010, Graz, Austria.

Glycosylated derivatives of natural product polyphenols display a spectrum of biological activities, rendering them critical for both nutritional and pharmacological applications. Their enzymatic synthesis by glycosyltransferases is frequently constrained by the limited repertoire of characterized enzyme-catalyzed transformations. Here, we explore the glycosylation capabilities and substrate preferences of newly identified plant uridine diphosphate (UDP)-dependent glycosyltransferases (UGTs) within the UGT72 and UGT84 families, with particular focus on natural polyphenol glycosylation from UDP-glucose.

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Archaeosomes for Oral Drug Delivery: From Continuous Microfluidics Production to Powdered Formulations.

Pharmaceutics

May 2024

Division of Medical Physics and Biophysics, Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Medical University of Graz, 8010 Graz, Austria.

Archaeosomes were manufactured from natural archaeal lipids by a microfluidics-assisted single-step production method utilizing a mixture of di- and tetraether lipids extracted from The primary aim of this study was to investigate the exceptional stability of archaeosomes as potential carriers for oral drug delivery, with a focus on powdered formulations. The archaeosomes were negatively charged with a size of approximately 100 nm and a low polydispersity index. To assess their suitability for oral delivery, the archaeosomes were loaded with two model drugs: calcein, a fluorescent compound, and insulin, a peptide hormone.

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Laboratory Investigations of the Leica RTC360 Laser Scanner-Distance Measuring Performance.

Sensors (Basel)

June 2024

Institute of Engineering Geodesy and Measurement Systems, Graz University of Technology, A-8010 Graz, Austria.

A Leica RTC360 laser scanner was investigated using a linear horizontal comparator system with four targets of different reflectance. Several thousand panorama scans were conducted along the 30 m long comparator, basically in 40 mm steps. For a selected target, more detailed investigations were carried out with a 2 mm step width for a 2 m wide section.

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Interpretability of Causal Discovery in Tracking Deterioration in a Highly Dynamic Process.

Sensors (Basel)

June 2024

Institute of Interactive Systems and Data Science (ISDS), Graz University of Technology, Rechbauerstraße 12, 8010 Graz, Austria.

In a dynamic production processes, mechanical degradation poses a significant challenge, impacting product quality and process efficiency. This paper explores a novel approach for monitoring degradation in the context of viscose fiber production, a highly dynamic manufacturing process. Using causal discovery techniques, our method allows domain experts to incorporate background knowledge into the creation of causal graphs.

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Augmented Reality-Guided Extraction of Fully Impacted Lower Third Molars Based on Maxillofacial CBCT Scans.

Bioengineering (Basel)

June 2024

Division of Oral and Maxillofacial Surgery, Department of Dental Medicine and Oral Health, Medical University of Graz, 8036 Graz, Austria.

(1) Background: This study aimed to integrate an augmented reality (AR) image-guided surgery (IGS) system, based on preoperative cone beam computed tomography (CBCT) scans, into clinical practice. (2) Methods: In preclinical and clinical surgical setups, an AR-guided visualization system based on Microsoft's HoloLens 2 was assessed for complex lower third molar (LTM) extractions. In this study, the system's potential intraoperative feasibility and usability is described first.

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Nanoscale, surface-confined phase separation by electron beam induced oxidation.

Nanoscale

August 2024

Institut de Microelectrònica de Barcelona (IMB), Centre Nacional de Microelectrònica (CNM), Consejo Superior de Investigaciones Científicas (CSIC), 08193 Barcelona, Spain.

Electron-assisted oxidation of Co-Si-based focused electron beam induced deposition (FEBID) materials is shown to form a 2-4 nm metal oxide surface layer on top of an electrically insulating silicon oxide layer less than 10 nm thick. Differences between thermal and electron-induced oxidation on the resulting microstructure are illustrated.

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Hyaluronic acid conjugates of glycine peptides and L-tryptophan.

Int J Biol Macromol

August 2024

Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, SI - 2000 Maribor, Slovenia; Institute for Chemistry and Technology of Biobased System, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria. Electronic address:

Article Synopsis
  • The study discusses the conjugation of glycine peptides and L-tryptophan with sodium hyaluronate using a peptide coupling agent called DMTMM, with confirmation from various spectroscopic techniques.
  • Detailed analysis showed that the conjugation created stable amide bonds and retained the structural integrity of the peptides, allowing for quantification of substitution levels through NMR.
  • The resulting conjugates exhibited low cytotoxicity in tests with human umbilical vein endothelial cells, suggesting potential applications in tissue engineering and drug delivery.
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Refuse sorting is an important cornerstone of the recycling industry, but ever-changing refuse compositions and the desire to increase recycling rates still pose many unsolved challenges. The digitalisation of refuse sorting plants promises to overcome these challenges by optimising and automatically adapting the sorting process. This publication describes a system for image capturing, segmentation-based refuse recognition and data analysis of shredded refuse streams.

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Toward high-resolution 3D-printing of pharmaceutical implants - A holistic analysis of relevant material properties and process parameters.

Int J Pharm

July 2024

Research Center Pharmaceutical Engineering GmbH, Inffeldgasse 13, 8010 Graz, Austria; Institute of Process and Particle Engineering, Graz University of Technology, 8010 Graz, Austria. Electronic address:

In this work, filament-based 3D-printing, the most widely used sub-category of material extrusion additive manufacturing (MEAM), is presented as a promising manufacturing platform for the production of subcutaneous implants. Print nozzle diameters as small as 100 µm were utilized demonstrating MEAM of advanced porous internal structures at the given cylindrical implant geometry of 2 mm × 40 mm. The bottlenecks related to high-resolution MEAM of subcutaneous implants are systematically analyzed and the print process is optimized accordingly.

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