1,455 results match your criteria: "Cracow University of Technology[Affiliation]"

"Silatranization": Surface modification with silatrane coupling agents.

Adv Colloid Interface Sci

August 2025

Cracow University of Technology, Faculty of Chemical Engineering and Technology, Department of Biotechnology and Physical Chemistry, Warszawska 24, 31-155 Cracow, Poland; Photo4Chem, Lea 114, 30-133 Cracow, Poland; Photo HiTech Ltd., Bobrzyskiego 14, 30-348 Cracow, Poland. Electronic address: joanna

Silatranization, a specialized variant of silanization using silatrane compounds, is emerging as a powerful strategy to functionalize material surfaces. Compared to conventional silane coupling agents, silatranes exhibit remarkable hydrolytic stability and enhanced resistance to self-condensation, enabling controllable, water-independent formation of a polysiloxane self-assembled monolayer. This review critically examines the unique structure of silatranyl cages, emphasizing how the intramolecular N->Si bond and chelate effect modulate the silicon center's reactivity toward hydroxyl-decorated surfaces.

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This study aims to evaluate the application potential of unrefined vegetable oils derived from three plant species- (), (), and rapeseed ( L. var. )-as renewable raw materials for the synthesis of bio-based polyurethane foams.

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This article presents an innovative method for phosphate(V) removal from industrial wastewater using cerium(III) chloride as a coagulant, integrated with reagent recovery. The process combines coagulation, acid extraction, and multistage recovery of cerium and phosphorus, enabling partial reagent loop closure. Based on our previously published studies, at an optimised dose (81.

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The search for new antimicrobial agents is one of the major challenges in contemporary medicinal chemistry due to the global issue of increasing drug resistance. In our efforts to identify chemical structures with antibiotic activity that differ from commonly used antibiotics, we focused our research on (thio)semicarbazides and hydrazones. Guided by literature reports, we designed and synthesized a series of novel semicarbazides, thiosemicarbazides, and hydrazones based on the structure of 4-(morpholino-4-yl)-3-nitrobenzohydrazide.

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This article presents experimental studies on the characterization of geopolymer composites intended for applications in aquatic environments, with particular emphasis on underwater infrastructure. The motivation for conducting the research was the growing need to develop durable and ecological building materials that will be resistant to long-term exposure to moisture and aggressive chemical agents, typical for the underwater environment, where traditional cement concretes undergo gradual degradation due to long-term water impact, including hydrotechnical and underwater infrastructure. Geopolymer binders were produced based on metakaolin activated by alkaline solutions containing sodium hydroxide.

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The article presents a recognition of the current state of the art in the field of bridge structures made using concrete on lightweight aggregate. The article aims to show the reader why aggregate with low mechanical parameters and high absorption can be used in demanding bridge constructions. Divided into two parts, the first presents the history of both topics and compiles the parameters of currently used lightweight aggregates by considering the guidelines applicable in the EU, China, and America concerning bridge construction.

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Anisotropy of Mechanical Properties of 3D-Printed Materials-Influence of Application Time of Subsequent Layers.

Materials (Basel)

August 2025

Department of Materials Engineering, Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.

Three-dimensional concrete printing (3DCP) is an emerging additive manufacturing technology with increasing application potential in the construction industry, offering advantages such as reduced labor requirements, shortened construction time, and material efficiency. However, structural integrity remains a challenge, particularly due to weak interlayer bonding resulting from the layered manufacturing process. This study investigates the mechanical performance and anisotropy of 3D-printed mineral-based composites with respect to the time interval between successive layers.

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Contemporary construction faces the need to reduce its negative impact on the environment, prompting designers, investors, and contractors to seek more sustainable materials and technologies. One area of dynamic development is the use of natural fibers as an alternative to conventional, often synthetic, building components. Plant- and animal-based fibers, such as hemp, flax, jute, straw, bamboo, and sheep's wool, are characterized by low energy consumption in production, renewability, and biodegradability.

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This paper presents the effect of specimens' shape and size on the modulus of elasticity and compressive strength of high strength concrete. The European Standard EN 12390-13 allows not only for different procedures but also for different shapes and sizes of test specimens. However, it does not provide a relationship between specimen size and shape and elastic modulus.

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Biocompatible Thermoplastics in Additive Manufacturing of Bone Defect Fillers: State-of-the-Art and Future Prospects.

Materials (Basel)

August 2025

Department of Materials Engineering, Faculty of Materials Engineering and Physics, Cracow University of Technology, 37 Jana Pawła II Av., 31-864 Kraków, Poland.

The development of materials engineering allows for the creation of new materials intended for 3D printing, which has become a key tool in tissue engineering, particularly in bone tissue engineering, enabling the production of implants, defect fillers, and scaffolds tailored to the individual needs of patients. Among the wide range of available biomaterials, thermoplastic polymers such as polycaprolactone (PCL), polylactic acid (PLA), polyether ether ketone (PEEK), and polymethyl methacrylate (PMMA) are of significant interest due to their biocompatibility, processability, and variable degradation profiles. This review compiles the latest reports on the applications, advantages, limitations, and modifications in bone tissue engineering.

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Observation of the Very Rare Σ^{+}→pμ^{+}μ^{-} Decay.

Phys Rev Lett

August 2025

Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

The first observation of the Σ^{+}→pμ^{+}μ^{-} decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 5.4  fb^{-1}, collected with the LHCb detector at a center-of-mass energy of 13 TeV. A yield of 237±16  Σ^{+}→pμ^{+}μ^{-} decays is obtained, where the uncertainty is statistical only.

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Intravascular biosensors have become a crucial and novel class of devices in healthcare, enabling the constant real-time monitoring of essential physiological parameters directly within the circulatory system. Recent developments in micro- and nanotechnology have relevantly improved the sensitivity, miniaturization, and biocompatibility of these devices, thereby enabling their application in precision medicine. This review summarizes the latest advances in intravascular biosensor technologies, with a special focus on glucose and oxygen level monitoring, blood pressure and heart rate assessment, and early disease diagnostics, as well as modern approaches to drug therapy monitoring and delivery systems.

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Optical coordinate measurement is a universal technique that aligns with the rapid development of industrial technologies and new materials. Nevertheless, can this technique be consistently effective when applied to the precise measurement of all types of materials? As shown in this article, an analysis of optical measurement systems reveals that some materials cause difficulties during the scanning process. This article details the matting process, resulting, as demonstrated, in lower measurement uncertainty values compared to the pre-matting state, and identifies materials for which applying a matting spray significantly improves the measurement quality.

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Development and Mechanical Characterization of Environmentally Friendly PLA/Crop Waste Green Composites.

Materials (Basel)

July 2025

Department of Materials Engineering, Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.

This study presents the fabrication and characterization of sustainable polylactic acid (PLA)-based biocomposites reinforced with bio-origin fillers derived from food waste: seashells, eggshells, walnut shells, and spent coffee grounds. All fillers were introduced at 15 wt% into a commercial PLA matrix modified with a compatibilizer to improve interfacial adhesion. Mechanical properties (tensile, flexural, and impact strength), morphological characteristics (via SEM), and hydrolytic aging behavior were evaluated.

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The increasing consumption of edible oils has resulted in a parallel rise in waste cooking oil (WCO), a harmful waste stream but one that also represents a promising raw material. In this study, oil-based binders were synthesised from WCO using various reagents: Sulfuric(VI) acid, hydrobromic acid, acetic acid, salicylic acid, glycolic acid, zinc acetate, ethanol, hydrogen peroxide, and their selected mixtures. The manufacturing process was optimised, and the composites were evaluated for physicochemical and mechanical properties, including compressive strength, bending strength, and water absorption.

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Various construction materials are used in contemporary building structures. Modern buildings face impacts like dead, live, snow, and wind load. They may also face extreme conditions, such as seismic activity, which can threaten their safety and functionality.

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Cross-linked poly(alkylene citates) (cPAC) based on 1,6-hexanediol (cPHC) and 1,8-octanediol (cPOC) and modified with 0.4, 0.8 and 1.

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A closed loop for polyurethane biofoams designed in line with the European Green Deal.

J Environ Manage

September 2025

Cracow University of Technology, Faculty of Chemical Engineering and Technology, Department of Chemistry and Technology of Polymers, Warszawska 24, 31-155, Cracow, Poland.

Glycolysis is an efficient chemical degradation method allowing depolymerization of thermosetting rigid polyurethane foams into reusable monomers and oligomers. This study looks into a chemolysis of polyurethane biofoams containing different amounts of biopolyol (25-100 %) in the polyol premix. Increasing the biopolyol content in a foam had a positive effect on the viscosity of the rebiopolyol obtained as a result of the chemolysis reaction.

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Introduction: Catheter-associated urinary tract infections (CAUTIs) are among the most prevalent hospital-acquired infections, posing a serious clinical and economic burden, particularly in the context of rising antibiotic resistance. Biofilm formation on indwelling catheters by multidrug-resistant uropathogens further complicates treatment and prevention, underscoring the urgent need for alternative, non-antibiotic solutions.

Areas Covered: This article explores the potential of bacteriophage- and enzybiotic-coated urinary catheters as an innovative strategy to prevent recurrent bacterial infections.

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Evidence for B^{-}→D^{**0}τ^{-}ν_{τ}[over ¯] Decays.

Phys Rev Lett

July 2025

Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

The first evidence for the decay B^{-}→D^{**0}τ^{-}ν[over ¯]_{τ} is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9  fb^{-1}, at centre-of-mass energies of 7, 8, and 13 TeV. Here, the D^{**0} meson represents any of the three excited charm mesons D_{1}(2420)^{0}, D_{2}^{*}(2460)^{0}, and D_{1}^{'}(2400)^{0}. The B^{-}→D^{**0}τ^{-}ν[over ¯]_{τ} signal is measured with a significance of 3.

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A series of linear isocyanate-free polyurethanes (NIPUs) were obtained via the aminolysis of erythritol dicarbonate (EDC) with polyethers (diamino-PEG, diamino-PPO, and diamino-PEG/PPO) and 1,12-diaminododecane (DADD), which acts as a chain extender to form hard segments. The obtained NIPUs contained different concentrations of DADD relative to the polyether (72.5-80 wt%).

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Effect of Mass Reduction of 3D-Printed PLA on Load Transfer Capacity-A Circular Economy Perspective.

Materials (Basel)

July 2025

Faculty of Mechanical Engineering, Department of Applied Mechanics and Biomechanics, Cracow University of Technology, al. Jana Pawła II 37, 31-864 Kraków, Poland.

(1) Background: Optimizing infill density in 3D-printed PLA parts reduces material usage, cost, and waste. This study examines mechanical behavior in the initial and hydration stages. The findings provide valuable data for numerical simulations and engineering applications in additive manufacturing.

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The growing application of carbon fiber-reinforced polymers (CFRPs) in construction opens new possibilities for replacing traditional materials such as steel, particularly in strengthening and retrofitting concrete structures. CFRP materials offer notable advantages, including high tensile strength, low self-weight, corrosion resistance, and the ability to be tailored to complex geometries. This paper provides a comprehensive review of current technologies used to strengthen concrete columns, with a particular focus on the application of fiber-reinforced polymer (FRP) tubes in composite column systems.

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The search for substances that increase the immunity of bees is becoming a necessity in the era of various environmental threats and the declining immunocompetence of these insects. Therefore, we tested the biological and physicochemical properties of (7DOC). In a cage test, two groups of bees were created: a control group fed with sugar syrup and an experimental group fed with sugar syrup with the addition of 7DOC.

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