Browsing by Type "prezentacja"

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Access status: Open Access ,
Calcium phosphate-based hybrid biomaterials for bone regeneration and local antibacterial therapy
Pańtak, Piotr; Belcarz, Anna; Czechowska, Joanna P.; Zima, Aneta
Wydział Inżynierii Materiałowej i Ceramiki
Composites based on hydroxyapatite (HA) and/or tricalcium phosphate (TCP) along with polymers, are widely used in bone regeneration due to their excellent biocompatibility. However, one of the challenges associated with their implantation procedures is the occurrence of inter- and post-operative bacterial infections. To address this issue biomaterials can be enriched with antibacterial agents such as: metallic nanoparticles (eg. AgNPs, AuNPs), ions (Cu2+, Ag+) or antibiotics, which can effectively inhibit the growth and proliferation of a wide range of bacteria. In this study, composites based on αTCP and hybrid granules were developed and examined. Hybrid granules composed of hydroxyapatite, methylcellulose and/or chitosan were obtained via wet-chemical method. Materials were enriched with various nanoparticles, including AuNPs, AgNPs and CuONPs. The chemical and phase composition (XRF,XRD), setting times (Gillmore Apparatus), and compressive strength (Instron 3345) were examined. Microstructure was observed using SEM. Furthermore, the bioactive potential in vitro in SBF as well as antibacterial activity against E. coli, and S. aureus were evaluated. In the present study, some key features were improved by developing novel biomaterials. The designed composites offer biocompatibility, sufficient mechanical and antibacterial properties. Based on the obtained results, it can be concluded that the developed materials hold promise as candidates preventing post-surgical infections in hard tissue applications. Further biological studies are necessary to comprehensively characterize these biomaterials. Acknowledgments Research project supported by the programme ‘Excellence initiative – research university” for the AGH University of Science and Technology and the AGH Faculty of Materials Science and Ceramics (Project No. 16.16.160.557). This research was funded in whole or in part by National Science Centre, Poland (Project MINIATURA7 No. 2023/07/X/ST11/00705). For the purpose of Open Access, the author has applied a CC-BY public copyright licence to any Author Accepted Manuscript (AAM) version arising from this submission.
Access status: Open Access ,
Effect of binder type on properties of molding sands dedicated to 3D printing
(2025) Major-Gabryś, Katarzyna; Halejcio, Dawid
Wydział Odlewnictwa
This conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during ECIG 2025 European Cast Iron Group Meeting 2025 on 29 April 2025 in Milan presented the influence of binder type on the properties of molding sands, including sands dedicated to 3D printing. The authorsdemonstrated the possibility of replacing environmentally harmful organic binders with inorganic binders. Various technologies for binding molding compounds were presented, including chemical, thermal (also microwave) or combined binding. The effects of different binders on the strength, permeability, abrasion of the tested sands were presented, as well as their influence on the kinetics of binding or thermal deformation.
Access status: Open Access ,
Effects of very low piston speed regimes on near-isothermal behaviour of piston expanders for micro-CAES systems
Gryboś, Dominik; Markowski, Jan; Leszczyński, Jacek
Wydział Energetyki i Paliw
Access status: Open Access ,
Environmentally friendly foundry molding sands as a part of Green Deal policy
(2025) Major-Gabryś, Katarzyna
Wydział Odlewnictwa
This conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during XXXI. medzinárodnej vedeckej konferencie slovenských, českých a poľských zlievačov SPOLUPRACA 2025 in Rajecke Teplice (Slovak Republik) aimed analyzing modern solutions for molding sands, both with organic and inorganic binders. In molding sands with organic binders, the innovative approach of replacing part of the binder with biodegradable additives reduces the harmfulness of molding sand at the stage of casting production a solution, molding sands with organic binders based on modified with furfuryl alcohol resins cured by hardeners with reduced sulfur content, molding technologies with alkyd resins hardened by catalyst based on isocyanates and alkaline phenolic resin hardened by esters. Molding sands with environmentally friendly inorganic binders based on sodium silicates and aluminosilicates were also analyzed.
Access status: Open Access ,
From skin patches to scaffolds with controlled electrical environment for cell growth: engineering surface properties of electrospun fibers
(2024) Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki Przemysłowej
Access status: Open Access ,
Harmonic resonances and subquantization in the hydrogen emission spectrum
Suder, Marek
An alternative method for analyzing the hydrogen spectrum is presented, based on recording orbital energies as precise fractions, which allows the identification of harmonic relationships between lines not visible in standard rounded data. Among other things, an exact 3:1 relationship between the H(5→4) and H(20→10) lines is demonstrated. The fundamental unit of photon energy ε₀ and the corresponding subquantum unit [sQ] were introduced. All analyzed lines of the Lyman , Balmer , Paschen , and Brackett series (n ≤ 7, m ≤ 4) form a discrete resonant lattice with a modulus of ~18.64 GHz , suggesting the existence of a deeper harmonic organization of the spectrum. The method provides an analytical tool allowing for more precise organization of spectroscopic data and may find applications in high-resolution spectroscopy, astrophysics, and the analysis of fundamental physical constants.
Access status: Open Access ,
Identifying the origin of water appearances in salt mines using isotope-aided methodologies: new insights through combined analyses of water leakages and atmospheric water vapor
Pierchala, Anna; Duliński, Marek ; Gorczyca, Zbigniew; Różański, Kazimierz; Staszczak, Waclaw
Wydział Fizyki i Informatyki Stosowanej
Uncontrolled water appearances in salt mines pose the largest hazard to their safe operation. Two major categories of water appearances in Polish salt mines were identified: (i) syngenetic brines associated with formation of salt deposits, and (ii) meteoric waters of infiltration origin [1]. Whereas the first category of waters is generally considered safe because they are fully saturated brines and usually occur in limited quantities, meteoric waters of infiltration origin pose serious danger to mines’ operation and need to be controlled. Isotope analyses of water appearances in Polish salt mines started in the early 1970s [1]. Although it soon became clear that ²H and ¹⁸O isotope contents in mine waters constitute a powerful tool for identification of their origin, there are still some problems with unambiguous classification of those waters, resulting mainly from their unknown interaction with mines’ atmosphere. We report here the results of a dedicated study focused on quantification of spatio-temporal variability of δ²H and δ¹⁸O in atmospheric moisture present in the Klodawa Salt Mine, the largest salt mine in Poland (production of ca. 6x10⁵ tons of salts annually). Autonomous units allowing collection of monthly composite samples of mines’ atmosphere have been installed at 7 representative localities inside the mine and operated for the period of 14 months. The units were also measuring temperature and relative humidity. The ²H and ¹⁸O isotope composition of water vapour in the collected air samples was measured in the laboratory using Picarro 2140-i CRDS analyzer. References: [1] Dulinski, M., Rozanski, K., Brudnik, K., Kolonko, P., Tadych, J., 2013. Isotope monitoring of water appearances in salt mines: The Polish experience. In. Natural Analogues for Safety Cases of Repositories in Rock Salt. Nuclear Energy Agency Report, NEA/RWM/R(2013)10, OECD, 123-131.
Access status: Open Access ,
Marine plastic waste management according to circular economy concept through the interdisciplinary and international cooperation
Magdziarz, Aneta; Wang, Jiawei; Wu, Chunfei; Sullivan, James; Mlonka-Mędrala, Agata
Wydział Inżynierii Metali i Informatyki Przemysłowej
Global plastic production is currently at a rate of 200,000 tonnes per year, and it is projected to increase to 33 billion tonnes per year by 2050. Approximately 10% of the plastic produced ends up in the seas and oceans. Plastic pollution in marine and coastal environments is a growing concern worldwide. Sources of this waste include shipping transportation, coastal tourism, marine aquaculture, and fishing. It is estimated that at least 14 million tonnes of plastic enter the oceans and seas annually. Furthermore, beach litter, which often consists of plastic packaging, lids, bottles, and cigarette butts, poses significant challenges. The G20 countries signed an Action Plan on Marine Litter in Germany in 2017, recognizing the urgent need to prevent and reduce marine litter to preserve human health as well as marine and coastal ecosystems. This highlights the need to reduce the amount of plastic waste in the sea, ocean, and coasts and find solutions to manage the existing waste. Proper management of marine waste can help stop the flow of waste in line with a closed-loop economy. Reducing and stopping plastic waste from reaching the oceans is crucial for achieving the UN Sustainable Development Goals (SDGs). The CUPOLA project is the international, interdisciplinary, and intersectoral research and innovation project aiming to find solutions to this global problem. The main goal of the CUPOLA project is to establish long-term research cooperation between institutions with complementary expertise to design and develop carbon-neutral, scalable, and socially acceptable methods to sort and convert plastic waste into valuable chemicals and materials. The originality of CUPOLA lies in the collaborative network among experimentalists, theoreticians, and industrialists. Key technologies in the project include waste sorting and pre-treatment methods. Novel pneumatic systems are developed for the separation of waste plastics, effectively separating the plastic waste into PET-rich, PO-rich, and PA-rich streams. The successful separation of plastic waste is crucial for the subsequent mechanical and chemical recycling processes. Thermochemical processes such as catalytic pyrolysis, catalytic gasification, aminolysis, and hydrothermal carbonization are applied to convert feedstocks into valuable chemicals and materials. For instance, the PET-rich stream will be transformed into bitumen additives through aminolysis, while the polyolefin-rich stream will be converted to benzene, toluene, and xylenes (BTX) via catalytic pyrolysis, and to H2 and carbon nanotubes through catalytic gasification. The project will involve process modeling, techno-economic analysis, and life cycle assessment to provide essential information about the economic viability and environmental impact of these processes. Additionally, renewable energy sources and carbon capture technologies will be integrated into the final design of the CUPOLA processes to ensure carbon neutrality. This project has the potential to bring together a wide range of research and industry groups in chemistry, chemical engineering, civil engineering, mechanical engineering, environmental science, and computer science to collaborate on the recycling of marine plastic waste. The success of the project will contribute to the achievement of Sustainable Development Goals (SDGs) 3, 12, and 14 by reducing plastic pollution in the oceans and converting waste into value-added products.
Access status: Open Access ,
Non-Thermal Plasma for Microplastic Degradation
Molloy, Daniel; Cellarius, Róisín; Naughton, Eva; Wu, Chunfei; Sullivan, James A.
This study investigates the potential of non-thermal plasma (NTP) for degrading marine microplastics, specifically polystyrene (PS) and polymethylmethacrylate (PMMA). Experiments were conducted with and without Fe?O? as a Fenton catalyst to enhance degradation. Spectroscopic analyses showed no significant chemical changes to the microplastics after plasma exposure, regardless of catalyst presence. The results suggest that limitations such as short lifetimes of reactive species and insufficient contact with microplastic particles hinder effective degradation under the tested conditions.
Access status: Open Access ,
Selection of chemically cured molding sands’ with inorganic binders dedicated to 3D sand printing
(2025) Halejcio, Dawid; Major-Gabryś, Katarzyna
Wydział Odlewnictwa
This conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during XXXI. medzinárodnej vedeckej konferencie slovenských, českých a poľských zlievačov SPOLUPRACA 2025 in Rajecke Teplice (Slovak Republik) determined the influence of molding sands’ with different inorganic binders composition on their chosen properties. The molding sands with 3 commercial inorganic binders used in traditional mold and core production technologies were tested as well as the molding sands dedicated to 3D printing with new binders based on them. Four types of hardener were used for chemical curing.
Access status: Open Access ,
Self-assembling, antibacterial hybrid calcium phosphate-based composites
Czechowska, Joanna P.; Pańtak, Piotr; Belcarz, Anna; Kowalska, Kinga J.; Zima, Aneta
Wydział Inżynierii Materiałowej i Ceramiki
Self-assembling materials have emerged as a groundbreaking solution in tissue engineering, offering innovative strategies to combat bacterial infections. Special attention is given to the hybrid granules. Our research focuses on self-assembling, antibacterial hybrid granules composed of hydroxyapatite, methylcellulose, and/or chitosan. These granules were produced via modified wet-chemical method and enriched with ions or nanoparticles (Cu 2+ , CuONPs). The chemical and phase compositions (XRF, XRD, FT-IR, Raman), compressive strength, thermal properties and microstructure were analyzed. Additionally, their bioactivity in simulated body fluid and antibacterial effectiveness against E. coli and S. aureus were tested. The obtained results are particularly promising as hybrids showed high mechanical strength, biocompatibility and antibacterial properties. Granules may be applied independently or as components of innovative biocomposites. Supported by the programme “Excellence initiative – research university” for the AGH University of Science and Technology and the AGH Faculty of Materials Science and Ceramics (No. 16.16.160.557). This research was funded in whole or in part by National Science Centre, Poland (Project MINIATURA7 No. 2023/07/X/ST11/00705). For the purpose of Open Access, the author has applied a CC-BY public copyright licence to any Author Accepted Manuscript (AAM) version arising from this submission.
Access status: Open Access ,
Single Photon Counting X-ray Detector with 25 um Pixel Pitch
Gryboś, Paweł; Kłeczek, Rafał; Kmon, Piotr; Otfinowski, Piotr
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
This paper presents the design and measurement results of a prototype integrated circuit called PIX25 for the readout hybrid pixel detectors operating in Single Photon Counting (SPC) mode. The IC is designed in the CMOS 40 nm process and its core is the matrix of 128 × 128 pixels. Usually, the pixel pitch in the SPC hybrid detector systems is in the range of 100 um down to 50 um. In the presented PIX25 IC the pixel pitch is only 25 um, which allows an increase in the position spatial resolution of the hybrid pixel detector and count rate per unit detector area beyond the state-of-the-art. Each pixel consists of a fast charge-sensitive amplifier with a detector leakage compensation circuit, a discriminator with a controlled threshold level, and 20-bit counters. To reduce the effects of pixel-to-pixel mismatch, each pixel contains independent blocks for offset and gain precise trimming. An important feature of the IC is its high reconfigurability. Each pixel can operate with the detector collecting holes or electrons. Thanks to the wide range of bias currents control the trade-off among power consumption, count rate, and noise performance can be obtained for a desired application. Additionally, the IC can be connected to sensors with a pixel pitch that is a multiplication of 25 um (e.g. 25 um, 50 um, 75 um, etc.). For operation with the detector pixel pitch of 50 um or higher any non-operating blocks/pixels in the readout matrix can be switched off, while their currents can be reused by working blocks/pixels only. Also each readout pixel can use up to 4 discriminators and 4 counters with different threshold settings.
Access status: Open Access ,
The influence of furfuryl resin type – classical and designed for sand 3D printing, on cast iron castings microstructure and surface roughness
(2025) Major-Gabryś, Katarzyna; Halejcio, Dawid; Fijołek, Andrzej; Marosz, Jan; Górny, Marcin
Wydział Odlewnictwa
This conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research on molding sands for molds and cores 3D printing. The work concerns the influence of furfuryl resin type (classical and designed for 3D printing) on cast iron castings properties. The pouring parameters were elaborated on the basis of MAGMA software. The microscopic observations of castings, produced in classical and 3D printed molds were conducted as well as roughness of the samples assessment.
Access status: Open Access ,
The use of green molding materials in the production of advanced lightweighting castings
(2025) Major-Gabryś, Katarzyna; Drożyński, Dariusz; Górny, Marcin; Marosz, Jan; Lelito, Janusz
Wydział Odlewnictwa
This conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research connected with the development of molding compounds for thin-walled castings. Two compounds with organic binders and two compounds with inorganic binders of self-curing molding sands were tested. Tests were carried out on the tensile and bending strength, permeability, and friability of the compounds. For selected molding sands, tests were carried out on their thermophysical properties (hot distortion parameter), gas emission, and thermal degradation. For castings production also molds produced using additive manufacturing (3D printing technology) were used.
Access status: Open Access ,
The use of green molding materials in the production of advanced lightweighting castings
Major-Gabryś, Katarzyna; Drożyński, Dariusz; Górny, Marcin; Marosz, Jan; Lelito, Janusz
Wydział Odlewnictwa
This conference presentation shows the results achieved within NetCastPL4.0 project (Title: Networking for advancing excellence and capacity in light-weight castings for Foundry 4.0 in Poland - NetCastPL4.0; ID: 101159771; Program: Horizon Europe; Funder: Komisja Europejska (KE)). The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research connected with the development of molding compounds for thin-walled castings. Two compounds with organic binders and two compounds with inorganic binders of self-curing molding sands were tested. Tests were carried out on the tensile and bending strength, permeability, and friability of the compounds. For selected molding sands, tests were carried out on their thermophysical properties (hot distortion parameter), gas emission, and thermal degradation. For castings production also molds produced using additive manufacturing (3D printing technology) were used.
Access status: Open Access ,
Wyzwania hydrogeologii izotopowej złóż soli w dobie rozwoju energetyki jądrowej w Polsce
(2024) Duliński, Marek ; Różański, Kazimierz; Pierchała, Anna; Staszczak, Wacław
Wydział Fizyki i Informatyki Stosowanej
Access status: Open Access ,
Znaczenie wynalazczości i strategia patentowa w Instytucie KOMAG
Prostański, Dariusz; Instytut Techniki Górniczej KOMAG
Biblioteka Główna