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1
Cienkie warstwy izolacyjne stosowane w aplikatorach do ablacji tkanek metodą nieodwracalnej elektroporacji
100%
Nowak G. , Mocha J. , Kaczmarek M.
Elektronika : konstrukcje, technologie, zastosowania
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2024
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tom Vol. 65, Nr 7
27--29
PL
W artykule przedstawiono opracowaną wstępną postać geometryczną uniwersalnego aplikatora przeznaczonego do badań nad elektroporacją oraz możliwość zastosowania cienkich warstw tlenków metali pełniących rolę izolacji na powierzchni jego elektrody.
EN
The paper presents the initially developed geometric form of a universal applicator intended for electroporation and the possibility of using the metal oxide thin film acting as insulation on the surface of its electrode.
2
Content available remote Próba systemowa uruchomienia z Elektrowni Wodnej Włocławek bloku cieplnego w Elektrowni Pątnów
100%
Kaczmarek M. , Kurzyński A. , Surlej M. , Brzozowski M.
Przegląd Elektrotechniczny
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2019
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tom R. 95, nr 2
11--18
PL
W artykule przedstawiono przygotowania, przebieg oraz wyniki próby systemowej, w której do uruchomienia bloku cieplnego w elektrowni systemowej wykorzystana została elektrownia wodna. Próba w swoim zakresie obejmowała samostart jednostek wytwórczych ze stanu beznapięciowego, podanie napięcia na wydzielony tor liniowy, uruchomienie wytypowanej jednostki cieplej, jej zsynchronizowanie i pracę na wyspie z elektrownią samostartującą oraz synchronizację układu wydzielonego z KSE w rozdzielni sieciowej.
EN
The article presents the preparations, course and results of the system test in which a hydroelectric power plant was used to start-up a thermal unit in a baseload power plant. The scope of the test included self-start of the selected generating units in de-energized state, applying their voltage to a separate, voltage-free start-up circuit, start-up of the selected thermal unit, its synchronization and operation in an island grid with the self-starting power plant and synchronization of the island grid with the NPS in a grid substation.
3
Content available Surface modifications used for inflow cannulas of the Ventricular Assist Devices – state of the art
100%
Kurtyka P. , Kustosz R. , Kaczmarek M. , Gonsior M.
Engineering of Biomaterials
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2019
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tom Vol. 22, no. 153 spec. iss.
41
4
Content available Surface modifications for inflow cannulas of ventricular assist devices – comparison of latest solutions
88%
Kurtyka P. , Kustosz R. , Kaczmarek M. , Gonsior M. , Tokarska K.
Engineering of Biomaterials
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2019
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tom Vol. 22, no. 151
17--23
EN
Nowadays, the Mechanical Circulatory Support (MCS) within the Ventricular Assist Devices (VAD) appears to be a reliable and effective solution for patients with advanced heart failure (HF). After many years of work, extracorporeal pulsatile VADs have been replaced by new generations of implantable continuous flow (CF) pumps. Clinical experience has shown that present-day pump constructions still need to be improved to minimize the risk of complications during heart assistance. One of the complications is the pump inflow obstruction caused by the ingrowth of tissue into the blood inflow path and pump thrombosis. The main goal is to develop a coating for the external surface of the inflow cannula to provide controlled tissue ingrowth. The smooth surface of the cannula external wall results in the tissue overgrowth into the pump inflow orifice, and may be a source of emboli. The paper presents external surface modifications of the inflow cannula performed by different VAD manufacturers within the topography characterization. The inflow cannulas used in CF VADs are mainly made of titanium alloy due to its mechanical properties and high biocompatibility. In general, the discussed surface coatings were characterized by the roughness of about ≈ Ra = 15 μm, high porosity and good wettability Φ ≈ 60°. The surface was covered with titanium microspheres or titanium mesh. The developed surfaces and clinical experience confirm the ability to control the tissue ingrowth along the external surfaces of the inflow cannula at the tissue-implant interface.
5
Content available Technology selection of surface modification for cardiac implants used in MCS therapy
88%
Kurtyka P. , Major R. , Gawlikowski M. , Kaczmarek M. , Kustosz R.
Engineering of Biomaterials
|
2020
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tom Vol. 23, no. 158 spec. iss.
57
6
Content available remote Próba systemowa uruchomienia bloku cieplnego w Elektrowni Turów jako weryfikacja możliwości wykorzystania Elektrowni Wodnej Dychów w procesie restytucji KSE
75%
Grządzielski I. , Sroka K. , Złotecka D. , Kurzyński A. , Kaczmarek M. , Brzozowski M. , Borodynko J.
Przegląd Elektrotechniczny
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2019
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tom R. 95, nr 2
29--34
PL
W referacie przedstawione zostaną wyniki pomiarów zarejestrowane w trakcie próby systemowej uruchomienia bloku energetycznego o mocy 261 MW w Elektrowni Turów z elektrowni wodnej Dychów. Ocenie poddane zostaną między innymi możliwości synchronizacji uruchomionego bloku w Elektrowni Turów z hydrogeneratorami Elektrowni Wodnej Dychów obciążonymi potrzebami własnymi jednostek wytwórczych i pompami w Elektrowni Wodnej Dychów.
EN
In the paper, the measuring results recorded during the system experiment of activating the 261 MW power unit in Turów Power Plant from the Dychów hydropower plant (HP Dychów) are presented. The approach will cover, among others, the possibilities to synchronize the activated unit in Turów Power Plant with HP Dychów sets loaded by auxiliaries of generating units and pumps in HP Dychów.
7
Content available remote Biofunctional impact of textured coatings in the application of heart assist therapy
63%
Kurtyka P. , Kopernik M. , Kaczmarek M. , Surmiak M. , Major Ł. , Kustosz R. , Więcek J. , Kurtyka K. , Bartkowiak A. , Major R.
Archives of Civil and Mechanical Engineering
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2023
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tom Vol. 23, no. 1
art. no. e31, 2023
EN
Due to a lack of organs, cardiac support systems are being implanted in patients with severe congestive heart failure. One of the solutions to overcome complications such as infow obstruction or pump thrombosis, which may occur in the case of ventricular assist devices, is to modify the surface of cannulas for the controlled blood clotting process. The results obtained up till now for developed surface coatings clearly show the influence of topographical and mechanical parameters of the coatings on cell viability and protein adsorption mechanism. The new coatings should enable the controlled growth of scar tissue, resulting in the limitation of thromboembolic events, and the reduction of cystic tissue growth into the fow lumen. The aim of this study is to evaluate the correlation between surface topography parameters on the susceptibility of cells to grow and adhere to the substrate as a solution with potential for use in MCS (mechanical circulatory support) devices. Research on surfaces used in MCS devices and on inflow cannulas has been carried out for many years, while the novelty of the present solution makes it a milestone within that type of application simultaneously allowing for appropriate selection of process parameters. Surface modifcation of titanium alloy Ti6Al7Nb was carried out using vacuum powder sintering of CP-Ti (commercially pure titanium) powder with two morphologies (regular spheres and irregular grains). The characterization of coatings obtained with the proposed method and the influence of measured topographic parameters (applying scanning electron microscopy, contact angle measurement and contact proflometry) on the cytotoxicity and susceptibility to protein adsorption were presented. Advanced albumin adsorption studies have fully confrmed the dependence of surface complexity on protein adsorption. The obtained results show a high potential of the produced coatings toward enabling permanent integration at the implant with the soft tissue.
8
Content available Biodegradable polymer coatings on Ti6Al7Nb alloy
63%
Szewczenko J. , Kajzer W. , Kajzer A. , Basiaga M. , Kaczmarek M. , Antonowicz M. , Nowińska K. , Jaworska J. , Jelonek K. , Kasperczyk J.
Acta of Bioengineering and Biomechanics
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2019
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tom Vol. 21, no. 4
83--92
EN
The aim of the study was to determine the influence of long term exposure to Ringer’s solution of biodegradable polymer coatings containing an active substance on the Ti6Al7Nb alloy substrate on the physical and chemical properties of the coatings and the degradation process of the metal substrate. The studies used poly(L-lactide-co-trimethylene carbonate) P(L/TMC), poly(L-lactide-co-trimethylene carbonate-glycolide) P(L/TMC/G) and poly(D,L-lactide-glycolide) (PLGA) coatings applied to the anodically oxidized Ti6Al7Nb alloy by means of dipping method (1, 2 and 3 dips). The polymer coatings contained ciprofloxacin. Roughness and wettability tests were carried out on the substrate and polymer coatings, the pitting corrosion resistance of the substrate and samples with polymer coating was determined, the number of metallic ions released to the solution from the coated and uncoated samples was determined as well as the adhesion of polymer coatings. The research was supplemented by microscopic observations. The results of the research indicate different influence of exposure to Ringer’s solution on the physical and chemical properties of biodegradable polymer coatings containing ciprofloxacin and the course of the degradation process of the metal substrate.
9
Content available Effect of textured surface topography parameters on cells proliferation and tissue growth in the mechanical circulatory support application
63%
Kurtyka P. , Major R. , Kustosz R. , Zalewski J. , Wiecek J. , Bartkowiak A. , Kaczmarek M. , Joszko K. , Grajoszek A.
Engineering of Biomaterials
|
2021
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tom Vol. 24, no. 163
47
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