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Search results for: tissue%20engineering
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Olfactory and tissue markers of fear in mammals including humans
PublicationW pracy przedstawiono informacje na temat:-klasyfikacji i budowy chemicznej związków chemicznych zaliczanych do grupy feromonów,-ich rola w funkcjonowaniu organizmów żywych w tym także organizmu ludzkiego,wyników badań prowadzonych z wykorzystaniem komory ekspozycyjnej własnej konstrukcji,metodyk analitycznych wykorzystywanych do oznaczania śladowych zawartości feromonów w próbkach wydychanego powietrza.
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The reactions occuring on the implant as a result of contact with human tissue
PublicationObecnosc implantu w ciele czlowieka powoduje liczne, czesto nieprzewidywalne skutki. Powodem takiej sytuacji jest duza roznorodnosc interakcji materialu medycznego z kontaktujaca sie z nim tkanka. Stwierdzenie to dotyczy glownie oddzialywan i skutkow zachodzacych na poziomie molekularnym w poszczegolnych komorkach kontaktujacej sie tkanki.
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Young’s modulus distribution in the FEM models of bone tissue
PublicationThis paper presents how differences of Young’s modulus in adjacent finite elements typical for organic materials such as bone tissue, influence stress calculating. Emphasizing high computational cost of variable Young’s modulus in parts of the model, where the number of finite elements has been raised, the authors wants to prove that new model of finite element which has variable Young’s modulus in its volume needs to be created....
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TG and DSC studies of bone tissue: Effects of osteoporosis
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Nanoparticle-free tissue-mimicking phantoms with intrinsic scattering
PublicationWe present an alternative to the conventional approach, phantoms without scattering nanoparticles, where scattering is achieved by the material itself: spherical cavities trapped in a silicone matrix. We describe the properties and fabrication of novel optical phantoms based on a silicone elastomer polydimethylsiloxane (PDMS) and glycerol mixture. Optical properties (absorption coefficient µa, reduced scattering coefficient µs',...
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Experimental measurements of friction forces on the tissue in probabilistic view
PublicationNiniejsza praca jest poświęcona wyznaczaniu wartości sił tarcia wywołanych podczas hydrodynamicznego przepływu lepkosprężystej cieczy odżywczej na powierzchniach hodowanych chondrocytów w bioreaktorze. Badania realizuje się w nano skali przy wykorzystaniu mikroskopu sił atomowych. Chondrocyty hodujemy w celu naprawy uszkodzonych chrząstek stawowych kolana człowieka.
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Estimation of flow for tissue perfusion of nutrient liquids in bioreactor.
PublicationPrzedstawione zostały problemy związane z wyznaczaniem pola prędkości w warstwie przyściennej opływanej tkanki miękkiej w bioreaktorze. Warunki brzegowe na powierzchni miękkiej tkanki o właściwościach porowatych zostały w niniejszej pracy sformułowane.
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Marine polymers in tissue bioprinting: Current achievements and challenges
PublicationBioprinting has a critical role in tissue engineering, allowing the creation of sophisticated cellular scaffolds with high resolution, shape fidelity, and cell viability. Achieving these parameters remains a challenge, necessitating bioinks that are biocompatible, printable, and biodegradable. This review highlights the potential of marine-derived polymers and crosslinking techniques including mammalian collagen and gelatin along...
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Tribological properties of tissue in biobearings and bioreactors as the histotribological parameters
PublicationReferat przedstawia stan wiedzy oraz potrzeby b+r w zakresie celów badawczych podjętych w projekcie BioBearing, finansowanym przez Komisję Europejską. Są to badania teoretyczne, numeryczne i eksperymentalne problemów tribologii tkanek jako elementów histotribologii a w szczególności smarowania stawów nienewtonowskimi cieczami synowialnymi w warunkach nieustalonych z uwzględnieniem deformacji chrząstki stawowej w opisie stochastycznym.
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Bioaccumulation of metals in tissues of marine animals, Part II - metal concentrations in animal tissues
PublicationThe bioaccumulation of metals in an animal depends on a multitude of factors: biotic ones, like its body dimensions and mass, age, sex, diet, metabolism and position in the trophic web, as well as abiotic ones such as the distribution of metals in its environment, the salinity, temperature and pH of the water, habitat type, interactions with other metals. But it is diet that has the greatest influence on the accumulation of metals...
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PLANT CELL TISSUE AND ORGAN CULTURE
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Monitoring of breast tissue thermo-ablation by means of impedance measurements
PublicationW pracy przedstawiono rozważania dotyczące monitorowania jakości termoablacji zmian nowotworowych w piersi przy pomocy pomiarów impedancyjnych. Pokazano prototypowe konstrukcje sond do termoablacji jak również zaprezentowano wyniki symulacji i pierwszych eksperymentów. A usefulness of a developed probe combining power delivery to ablated breast tumour and simultaneous impedance measurements is discussed in the paper. It consists...
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Multi-layered tissue head phantoms for noninvasive optical diagnostics
PublicationExtensive research in the area of optical sensing for medical diagnostics requires development of tissue phantoms with optical properties similar to those of living human tissues. Development and improvement of in vivo optical measurement systems requires the use of stable tissue phantoms with known characteristics, which are mainly used for calibration of such systems and testing their performance over time. Optical and mechanical...
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INFLUENCE OF PRESERVATIVE ON THE TENSILE STRENGTH OF THE TISSUE OF PORCINE CIRCULATORY SYSTEM
PublicationCurrently one of the leading causes of death worldwide is heart diseases which include calcification of heart valves and vascular aneurysm. There are many biomaterials that can substitute pathologically altered tissue, however, none of them is as perfect as native tissue. Currently, scientists are looking for new biomaterials that can be successfully implanted without exposing the patient to reoperation. Each material introduced...
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The influence of durable contact on human tissue on austenitic biomaterials behaviour
PublicationBadania opierają się na studium pojedynczego przypadku dwoch wkrętów ze stali austenitycznej, które były implantowane do organizmu człowieka jako element łączący złamaną kość piszczelową. Oba wkręty zostały zostały wkręcone w jednakowych warunkach, na okres 1 roku, po którym miały zostać wyjęte. Na skutek komplikacji życiowej nosiciela, wkręty te zostały usunięte dopiero podczas zabiegu po okresie 8 lat.
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Polyacrylamide‐based phantoms as tissue substitute in experimental radiation physics
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Determination of metronidazole residues in water, sediment and fish tissue samples
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The effects of RNA editing in cancer tissue at different stages in carcinogenesis
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Computational studies of friction forces for hard tissue cultivation in bioreactor.
PublicationPonieważ wymiana naturalego stawu na endoprotezę może być dokonywana 2-3 razy w życiu, problem leczenia przez transplantację tkanek chrzęstnych nabiera dużego znaczenia. Przeszczepów tkanki można dokonywać z sukcesem wiele razy. W bioreaktorach, środowisko hydrodynamiczne kształtuje hodowlę tkanek in vitro w obecności sił tarcia, poprzez bezpośrednie działanie na morfologię komórek a także poprzez pośrednie działanie na tkankę...
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Influence of sensor design and optical properties of tissue on the photoplethysmographic signal
PublicationPhotopletysmography and an associated technique called pulse oximetry are still explored due to the expectations that they give a lot of information about the state of the patient and, also, due to the fact that they are non invasive. Knowledge about the impact of various parameters on the measured signal leads to a faster and a more reliable way of analyzing measurement results and finding the dependencies between the involved...
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Optimization of the System for Determining the Volume of Tissue Needed for Breast Reconstruction
PublicationThis article presents techniques for reconstructing surfaces and volume calculations using a point cloud generated from 3D imaging. The main objective of this article was to optimize the voxel size for the most accurate representation of the surface of the female breast. We experimented with different methods for determining volume using images from the Intel D435i camera. In addition, we designed application and measurement station...
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Environmental Degradation of Engineering Materials & Materials Engineering and Technologies
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CONNECTIVE TISSUE RESEARCH
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CELL AND TISSUE BANKING
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CALCIFIED TISSUE INTERNATIONAL
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Fibrogenesis & Tissue Repair
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Journal of Tissue Viability
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Cell and Tissue Biology
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A special issue on Biophotonics in Europe
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Special issue - ECCE-6
PublicationWskazano na nadmierną konsumpcję energii i substancji w porównaniu z rzeczywistym zapotrzebowaniem dla życia ludzkiego. Wskazano na skutki nadmiernie intensywnej eksploatacji surowców i zanieczyszczenie środowiska. Wskazano na wybitnie nierównomierny rozkład zużycia energii w świecie. Omówiono straty energii spowodowane emisją metanu z kopalń. Przedyskutowano możliwości i zasadnośc stosowania biopaliw. Omówiono rolę inżynierów...
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Dynamics of mechanical model of implant-tissue system in ventral hernia repair
PublicationThe paper deals with a finite element modelling of implants in the problem of ventral hernia repair. The synthetic mesh implanted in the abdomen during surgery is here modelled as a membrane structure. Thesystem undergoes the internal abdominal pressure that occurs during the postoperative cough, the load identified in the literature as the main cause of the connection failure and hernia recurrence. The model can be used to estimate...
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Hard tissue samples as markers of occupational exposure in phosphatic fertilizer plant
PublicationW pracy opisano zastosowanie próbek włosów i paznokci do oceny narażenia pracowników zakładów nawozów fosforowych na zanieczyszczenie metalami ciężkimi. Jako metodę oznaczania 25 pierwiastków we włosach i paznokciach zastosowano aktywacje neutronową. Do opracowania wyników i ich oceny zastosowano szereg metod chemometrycznych.
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Cerebral tissue oxygenation during cranial osteopathic CV4 procedure in newborns
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Histopathological examination of tissue resected during bariatric procedures – to be done or not to be done?
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To Be or Not to Be Expressed: The First Evidence of a Nucleolar Dominance Tissue-Specificity in Brachypodium hybridum
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"3D-Breast System for Determining the Volume of Tissue Needed for Breast Reconstruction"
PublicationThis article presents methods for surface reconstruction and volume determination based on the point cloud created by 3D imaging. Such a system would be used to accurately estimate breast volume in patients classified for breast reconstruction surgery at plastic surgery centers. To develop such a system, various methods of determining volume, based on images from the Intel D435i camera, were tested. In addition, an application...
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Dopamine release in the rat cerebellum and hippocampus: a tissue 3-methoxytyramine study
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Polyurethane porous scaffolds (PPS) for soft tissue regenerative medicine applications
PublicationTissue engineering requires suitable polymeric scaffolds, which act as a physical support for regenerated tissue. A promising candidate might be polyurethane (PUR) scaffold, due to the ease of the PUR properties design, which can be adjusted directly to the intended purpose. In this study, we report a successful fabrication of porous polyurethane scaffolds (PPS) using solvent casting/particulate leaching technique combined with...
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Coherent-wave Monte Carlo method for simulating light propagation in tissue
PublicationSimulating propagation and scattering of coherent light in turbid media, such as biological tissues, is a complex problem. Numerical methods for solving Helmholtz or wave equation (e.g. finite-difference or finite-element methods) require large amount of computer memory and long computation time. This makes them impractical for simulating laser beam propagation into deep layers of tissue. Other group of methods, based on radiative...
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Full scattering profile of circular optical phantoms mimicking biological tissue
PublicationHuman tissue is one of the most complex optical media since it is turbid and nonhomogeneous. In our poster, we suggest a new type of skin phantom and an optical method for sensing physiological tissue condition, basing on the collection of the ejected light at all exit angles, to receive the full scattering profile. Conducted experiments were carried out on an unique set-up for noninvasive encircled measurement. Set-up consisted...
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3D-Breast System for Determining the Volume of Tissue Needed for Breast Reconstruction
Publication3D imaging systems can be used to effectively determine breast volumes for surgical applications. This article presents methods for surface reconstruction and volume determination based on the point cloud created by 3D imaging. Such a system would be used to accurately estimate breast volume in patients classified for breast reconstruction surgery at plastic surgery centers. To develop such a system, various methods of determining...
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Sacral sound-engineering
PublicationOrganologic and campanologic acoustical problems due to applications to sacral objects are characterized on ground of numerous reviewed publications and engineering reports. Participations of several involved research centres, mostly Polish, at solving these problems are evaluated. Some desirable future developments are indicated. Appendices bring examples of documentation on selected investigated objects.
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A Special Issue on Ubiquitous Computing in Healthcare
PublicationPrzetwarzanie bez granic w opiece zdrowotnej jest szczególnie istotne w konteście starzejącego się społeczeństwa. W pracy przedstawiono omówienie roli przetwarzania bez granic oraz opisano powiązane dziedziny tematyczne i prezentowane w numerze specjalnym zagadnienia.
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Urban Waterfront Regeneration: Origins of the Issue
PublicationThis paper deals with the origins of the issue of urban waterfront regeneration. The process of city-water interface was described with references to the three generations of port structures.
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Special Issue on Sliding Contact Bearings
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Editorial for the TPDL 2015 special issue
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Intelligent multimedia asplications - scanning the issue
PublicationCelem specjalnego wydania tego tomu czasopisma JIIS, zatytułowanego ''Inteligentne przetwarzanie multimediów'', było przedstawienie badań w tej dziedzinie, prowadzonych w różnych ośrodkach na świecie. Zawarte w tym tomie artykuły dotyczyły inteligentnego przetwarzania sygnałów fonicznych i wideo, jak również muzyki.
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Introduction to the ONDM 2022 special issue
PublicationThis JOCN special issue contains extended versions of selected papers presented at the 26th International Conference on Optical Network Design and Modeling (ONDM 2022), which took place 16–19 May 2022 at Warsaw University of Technology, Warsaw, Poland. The topics covered by the papers represent trends in optical networking research: application of machine learning to network management, cross-layer network performance optimization,...
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Altered circadian genes expression in breast cancer tissue according to the clinical characteristics
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Mathematical study of a tissue-implant connection in a ventral herniarepair in a context of the system's parameters
PublicationW pracy przedstawiono problem operowania przepuklin brzusznych u ludzi. Zaproponowano jednowymiarowy model układu powieź-implant. Na podstawie analizy wrażliwości zidentyfikowano najważniejsze parametry problemu.