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Tytuł:
Surface modifications used for inflow cannulas of the Ventricular Assist Devices – state of the art
Autorzy:
Kurtyka, Przemysław
Kustosz, Roman
Kaczmarek, Marcin
Gonsior, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/285894.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Źródło:
Engineering of Biomaterials; 2019, 22, no.153; 41
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface modifications for inflow cannulas of ventricular assist devices – comparison of latest solutions
Autorzy:
Kurtyka, Przemysław
Kustosz, Roman
Kaczmarek, Marcin
Gonsior, Małgorzata
Tokarska, Klaudia
Powiązania:
https://bibliotekanauki.pl/articles/283866.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
surface modification
VAD inflow cannula
tissue-implant interface
porous surface
Opis:
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 After many years of work, extracorporeal pulsatile VADs have been replaced by new generations of implantable continuous flow (CF) pumps.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.
Źródło:
Engineering of Biomaterials; 2019, 22, 151; 17-23
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology selection of surface modification for cardiac implants used in MCS therapy
Autorzy:
Kurtyka, Przemysław
Major, Roman
Gawlikowski, Maciej
Kaczmarek, Marcin
Kustosz, Roman
Powiązania:
https://bibliotekanauki.pl/articles/1844888.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implants
MCS therapy
surface modification
implanty
powierzchnia
modyfikacja
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 57
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of textured surface topography parameters on cells proliferation and tissue growth in the mechanical circulatory support application
Autorzy:
Kurtyka, Przemysław
Major, Roman
Kustosz, Roman
Zalewski, Jerzy
Wiecek, Justyna
Bartkowiak, Amanda
Kaczmarek, Marcin
Joszko, Kamil
Grajoszek, Aniela
Powiązania:
https://bibliotekanauki.pl/articles/1844854.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Źródło:
Engineering of Biomaterials; 2021, 24, 163; 47
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodegradable polymer coatings on Ti6Al7Nb alloy
Autorzy:
Szewczenko, Janusz
Kajzer, Wojciech
Kajzer, Anita
Basiaga, Marcin
Kaczmarek, Marcin
Antonowicz, Magdalena
Nowińska, Katarzyna
Jaworska, Joanna
Jelonek, Katarzyna
Kasperczyk, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/306476.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Ti6Al7Nb
powłoka polimerowa
zwilżalność
odporność na korozję
uwalnianie jonów
przyczepność
biodegradable polymer coating
wettability
corrosion resistance
ion release
adhesion of polymer coatings
Opis:
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.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 4; 83-92
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Third Mode of Thinking
Autorzy:
Kaczmarek, Bożydar L.J.
Stencel, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1969294.pdf
Data publikacji:
2018-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
problem-solving
mental schemas
abstract reasoning
bounded thinking
Opis:
A number of studies show that both children and adults exhibit difficulties with problem-solving tasks. In fact, only one-third of adults reach the formal operational stage. Coaching such tasks in everybody’s language proves to be helpful only if the situation described is close to life events. The presented study confirmed the improvement in the thematic version of the Wason Test both in pupils and university students, albeit being far from spectacular. The authors suggest distinguishing a bounded type of thinking characterized by highly schematic, mechanistic, and automated thinking. They argue that it results both in educational and everyday failures.
Źródło:
The New Educational Review; 2018, 53; 285-295
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Electrical Resistivity Tomography (ERT) in the investigation ofQuaternary land slide zones, based on the selected regions of Płock slope
Autorzy:
Kaczmarek, Łukasz
Mieszkowski, Radosław
Kołpaczyński, Marcin
Pacanowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2027107.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
slope sta bil ity
the P³ock slope
Electrical Resistiv ity Tomography (ERT)
quaternary
Opis:
The article shows the results of geophysical surveys performed by using Electrical Resistivity Tomography (ERT) method on se lected ragion of P³ock slope of a Tumski hill near Ba sil ica of As sump tion of the Blessed Vir gin Mary in P³ock and in Maszewo by the Vistula River a few ki lo me ters north of P³ock. The above-men tioned sec tions were se - lected due to land slide phe nom ena ob served there. Geo phys i cal sur veys were con ducted in or der to ver ify the state of the dis tri bu tion of elec tri cal re sis tiv ity in the sec tors where mass move ment was iden ti fied. The electrofusion crosssec tion near Ca the dral Ba sil ica shows clays and sands. Also in ERT prospection a zone of loose soils with high re sis - tance is clearly vis i ble. The re sults of the ERT method from Maszewo, in di cates his tor i cal land sur face of a land slide and that the slope in Maszewo con sists of co he sive de pos its. In or der to de scribe these par tic u lar is sues, geo log i cal cross-sec tions and safety fac tor ob tained by cal cu la tion are pre sented for the an a lyzed parts of the slope. The safety factor shows that prob a bil ity of land slide ac tiv ity near Ca the dral Ba sil ica is very un likely and in Maszewo is very high.
Źródło:
Studia Quaternaria; 2014, 31; 101-107
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Principle Component Analysis and logistic regression to support Six Sigma implementation in maintenance
Autorzy:
Antosz, Katarzyna
Jasiulewicz-Kaczmarek, Małgorzata
Machado, Jose
Relich, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/28328274.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
maintenance management
Six Sigma generation
DMAIC
PCA
logistic regression
Opis:
Improving the efficiency of maintenance processes is one of the goals of companies. Improvement activities in this area require not only an appropriate maintenance strategy but also the use of a new approach to increase the efficiency of the process. This article focuses on using Six Sigma (SS) to improve maintenance processes. As an introduction, the generations of SS development are identified, and traditional and advanced analytical tools that can be useful in SS projects are reviewed. As part of the research, an example of the implementation of the SS project in the maintenance process using the DMAIC and selected advanced analytical methods, such as PCA and logistic regression, was presented. The PCA results showed that it was enough to have seven main components to keep about 84% of the information on variability. In developed logistic regression explained the impact of the individual factors affecting the availability of the machines. The identified factors and their interactions made it possible to define maintenance activities requiring improvements
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 4; art. no. 174603
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The bactericidal degradation effectiveness of tannic acid-based thin films for wound care
Autorzy:
Kaczmarek, Beata
Wekwejt, Marcin
Nadolna, Kinga
Owczarek, Agata
Mazur, Olha
Pałubicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1844884.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
chitosan
degradation
compounds
chitozan
degradacja
kompozyty
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 25
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The bactericidal degradation effectiveness of tannic acid-based thin films for wound care
Autorzy:
Kaczmarek, Beata
Wekwejt, Marcin
Nadolna, Kinga
Owczarek, Agata
Mazur, Olha
Pałubicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1844938.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
chitosan
degradation
compounds
degradacja
kompozyty
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 25
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emotional attitudes linked to common objects: practical and clinical implications
Autorzy:
Kaczmarek, Bożydar L.J
Stencel, Marcin
Grzegorczyk, Michał
Marczak, Izabela
Pąchalska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2106017.pdf
Data publikacji:
2019-12-11
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
emotional attitudes
word associations
emotional reactions
objects
Opis:
Studies concerning emotional changes following brain damage neglect the emotional responses that might arise in reaction to the stimuli used in their examination of such patients. Yet those reactions may be quite forceful often provoking feeling of anxiety or panic and dismay. A questionnaire designed to reveal associations and emotional attitudes was presented to 96 extramural students. Four categories of products and the products within those categories were selected. The categories included: sweets; alcohol; transport, and consumer electronics. In addition, 174 participants of various ages and professions produced associations linked to emotionally loaded words. A list of associations and their dominance scores were created. It revealed that transport (4.9) and consumer electronics (5) were given the highest mean scores. Also, the terms car (5.3) and mobile phone (5) aroused the highest levels of emotion. The significance of the emotional attitudes of the participants to objects were determined within particular dimensions that measured likableness, interest, goodness, and attractiveness. The terms beer, chocolate, car and mobile phone were reported to be most acceptable in all four dimensions. The above data suggests that the emotional attitude awakened by a particular object finds its expression in all of the dimensions examined. The studies revealed the significance of primary subconscious affects for creating positive or negative attitudes. This should be taken into account by therapists since objects which evoke a negative affect may trigger a patient’s reluctance to take part in the rehabilitation procedure.
Źródło:
Acta Neuropsychologica; 2019, 17(4); 395-405
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bacterially expressed truncated F2 domain of Plasmodium falciparum EBA-140 antigen can bind to human erythrocytes
Autorzy:
Rydzak, Joanna
Kryńska, Katarzyna
Suchanowska, Anna
Kaczmarek, Radosław
Łukasiewicz, Jolanta
Czerwiński, Marcin
Jaśkiewicz, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1039687.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
truncated F2 domain purification
human erythrocyte binding
EBA-140 antigen
Plasmodium falciparum
recombinant F2 domain expression
Opis:
The recently identified erythrocyte binding antigen-140 (EBA-140) is a member of the Plasmodium falciparum DBL family of erythrocyte binding proteins, which are considered as prospective candidates for malaria vaccine development. The EBA-140 ligand is a paralogue of the well-characterized P. falciparum EBA-175 antigen. They share homology of domain structure, including Region II, which consists of two homologous F1 and F2 domains and is responsible for ligand-erythrocyte interaction during invasion. It was shown that the F2 domain of EBA-175 antigen seems to be more important for erythrocyte binding. In order to study activity and immunogenicity of EBA-140 antigen F2 domain, it is necessary to obtain recombinant protein of high purity and in a sufficient amount, which used to pose a challenge due to the high content of disulphide bridges. Here, we present a new method for expression and purification of Plasmodium falciparum EBA-140 antigen F2 domain in E. coli Rosetta-gami strain in fusion with the maltose binding protein (MBP). The truncated F2 domain formed by spontaneous proteolytic degradation of the fusion protein was purified by affinity chromatography on Ni-NTA resin followed by size exclusion chromatography. Molecular mass of this protein was confirmed by mass spectrometry. Its N-terminal amino acid sequencing revealed a proteolytic cleavage site within the F2 domain. The proper folding of the recombinant, truncated F2 domain of EBA-140 antigen was confirmed by circular dichroism analysis. The truncated F2 domain can specifically bind to human erythrocytes but its binding is not as efficient as that of full Region II. This confirms that both the F1 and F2 domains of EBA-140 antigen are required for effective erythrocyte binding.
Źródło:
Acta Biochimica Polonica; 2012, 59, 4; 685-691
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors determining the quality of life in patients undergoing radical surgery due to malignant tumors of the rectum
Autorzy:
Błaszkowski, Tomasz
Kładny, Józef
Al-Amawi, Tariq
Kaczmarek, Krystian
Kwietniak, Marcin
Wojtasik, Piotr
Halczak, Mirosław
Michalak, Tomasz
Jezierski, Karol
Chmialak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1391544.pdf
Data publikacji:
2021
Wydawca:
Index Copernicus International
Tematy:
Rectal cancer
Quality of life
Colostomy
Radiotherapy
Opis:
Introduction: Rectal cancer is one of the most common malignancies in developed countries. However, despite the increasingly better preoperative diagnostics, adaptation of surgical techniques to the location and advancement of the tumor, the combination of surgical treatment with neoadjuvant therapy and adjuvant treatment, standardized control tests, Poland still has not obtained satisfactory results regarding long-term survival. In addition, the effects of the therapy often differ significantly from those expected by patients and the doctors treating them. Aim of the study: To evaluate the effects of rectal cancer treatment among patients of the General and Oncological Surgery Clinic of the Pomeranian Medical University in Szczecin. The impact of numerous factors on postoperative quality of life was analyzed. Material and methods: Between 2007 - 2015, 263 radical resection procedures were performed in patients with diagnosed rectal cancer. Retrospectively, based on medical records, a database was created covering a range of clinical data. Information about death dates of some patients was obtained at the Registry Office in Szczecin. A survey supplementing clinical data and standardized quality of life assessment forms (EORTC QLQ - C30 and CR29) were sent to 120 living patients. A telephone conversation was carried out with some patients who did not respond to the surveys. Finally, data from 90 people was collected, which represents 75% of the patients enrolled in the study. Patients quality of life was assessed using EORTC questionnaire evaluation guides. Results: The patients quality of life worsened the most as a result of anorectal dysfunction. Incontinence of gases and stool, urgency and difficulty in defecation were demonstrated primarily in patients undergoing low rectal resection and irradiation. Patients undergoing radiotherapy, as a result of persistent low anterior resection syndrome, were forced to partially or completely withdraw from professional activity and to limit the pursuit of their interests. Their contacts with family, friends and acquaintances have also deteriorated. The presence of the intestinal stoma significantly affected the deterioration of the reception of the body's own image. However, no relation was found between the existence of the fistula and other aspects of the patients everyday life, including functioning in life and social roles. Conclusions: Due to the acceptable postoperative quality of life of patients with fistula and numerous imperfections of sphincter preserving techniques, operations resulting in terminal ostomy should not be considered as an extremity, and in the case of tumors of the lower rectum with unaffected sphincters, they should be considered as alternative methods for low anterior resection.
Źródło:
Polish Journal of Surgery; 2021, 93, 3; 1-9
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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