Temat: biomimetic - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Synthetic phosphoserine-tethered hyperbranched peptides as biomimetic coatings for medical implants
Autorzy:: Stϋbinger, S.
Nuss, K.
Bϋrki, A.
Mosch, I.
Sidler, M.
Meikle, S. T.
Rechenberg von, B.
Santin, M.
Tematy:: peptides
implants
biomimetic coatings; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/284800.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Turning maneuver of biomimetic underwater vehicle
Autorzy:: Praczyk, T.
Szymak, P.
Tematy:: biomimetic underwater vehicle
maneuverability; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/114569.pdf Link otwiera się w nowym oknie
Opis:: Biomimetic underwater vehicle equipped with two side fins and one tail fin can perform a turning maneuver in many ways using for that purpose a suitable setting of its fins. In order to select the most effective variant of the turning maneuver a number of tests with a real vehicle were performed. The paper presents the tests themselves as well as their results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Laboratory stand for research on mini CyberSeal
Autorzy:: Szymak, P.
Praczyk, T.
Pietrukaniec, L.
Hożyń, S.
Tematy:: biomimetic underwater vehicle
undulating propulsion; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/114481.pdf Link otwiera się w nowym oknie
Opis:: In recent times, we may notice some new designs of underwater vehicles, which imitate living underwater organisms, e.g. a fish, a seal, a turtle, etc. These vehicles are called biomimetic. They are driven by undulating propulsion, imitating wavy motion of fins, which were created during many years of evolution. In the paper, a laboratory stand for research on Biomimetic Underwater Vehicle (BUV) called mini CyberSeal is presented. The main objectives of the stand is to investigate future construction of BUV imitating a seal (made in scale) and to test different control algorithms for this BUV. At the beginning of the paper, an introduction to the research area and a structure of the laboratory stand is described in general, and then in the following section all elements of the stand are presented in details. At the end of the paper, an initial research on mini CyberSeal and a schedule of the future research are inserted.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Commercial sponges in heterogeneous catalysis: developing novel composites with cobalt and silver
Autorzy:: Żółtowska, Sonia
Modelska, Martyna
Piasecki, Adam
Jesionowski, Teofil
Tematy:: commercial sponge
biomimetic
4-nitrophenol
cobalt
silver; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1450217.pdf Link otwiera się w nowym oknie
Opis:: The use of commercial sponges in materials science has gained much recent attention. Their unique properties, namely a fibrous, rigid skeleton, thermal stability and resistance to acid and basic hydrolysis, have been the primary motivation to use them in the development of new composites. In this work, a simple method of immobilization of cobalt and silver cations, followed by their reduction using sodium borohydride, was successfully applied for the first time to obtain functionalized spongin scaffolds. Three different materials, labeled Co_spongin, Ag_spongin and Co-Ag_spongin, were prepared. Their morphological and physicochemical properties were explored using various techniques (SEM+EDS, TG/DTA, FTIR). The focal point of the research was the application of the resulting materials in the reaction of 4-nitrophenol reduction with sodium borohydride in water. It was found that all of the composites possess superior activity in the reduction of 4-nitrophenol, achieving high rate constants of 0.31 min-1 for Ag_spongin, 0.52 min-1 for Co_spongin and 0.86 min-1 for Co-Ag_spongin. Reusability tests showed that all of the composites could be reused five times. Additional structural analysis after catalytic application showed no visible changes in the morphology of the catalysts. The results indicate that spongin can be considered as a facile, cost-effective, renewable and environmentally friendly three-dimensional support for use in heterogeneous catalysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Some Aspects Concerning Titanium Coverage with Hydroxyapatite
Autorzy:: Perju, Manuela-Cristina
Nejneru, Carmen
Vizureanu, Petrica
Aelenei, Andra-Adorata
Sandu, Andrei Victor
Sachelarie, Liliana
Nabiałek, Marcin
Tematy:: hydroxyapatite
monetite
electrochemical deposition
biomimetic deposition
FTIR
SEM; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2106580.pdf Link otwiera się w nowym oknie
Opis:: Generally, the metallic implants do not exhibit any bio-integration properties in contact with bone tissues. To improve the interfacial properties of metallic implants in contact with bone, the coatings with thin biocompatible films are used. Two methods to coating titanium implants with hydroxyapatite are described. The first is a two phase method, where by cathodic polarization is deposed a monetite film followed by an alkaline treatment when the monetite is converted to hydroxyapatite. The second method is a biomimetic deposition on an alkaline activate titanium surface, using a five time more concentrated simulated body fluid (5xSBF). After deposition this samples was drying at 120℃ and was sintered at 700℃ for three hours. Optical microscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray (EDX) were used to characterize structure, morphology and compositions of the deposed films. In this study, electrochemical deposition and biomimetic deposition of hydroxyapatite are compared.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Mikrostruktura muszli inwazyjnego małża racicznica zmienna Dreissena polymorpha (Pallas, 1771)
Shell microstructure of the invasive zebra mussel Dreissena polymorpha (Pallas, 1771)
Autorzy:: Kędzierski, Mariusz
Wierzbicki, Adam
Gryczyńska, Kalina
Opis:: The freshwater clam Dreissena polymorpha (Pallas, 1771) has been fairly well characterised as a model invasive species, but certain issues related to shell biomineralisation have so far been addressed in only a few studies. This topic seems important because this mussel selectively accumulates certain heavy metals in its shell. In addition, the microstructure of the shell exhibits remarkable characteristics of an excellent biocomposite material that can be used in biomimetic research. Understanding the mechanism of biomineralisation will not only allow us to read long-term data that can be used to analyse the concentration of certain metals in the mussel’s environment, but also to use the shells of this invasive species to recover metals from water or as a tool for bioremediation. This publication introduces you to the issues related to mussel biomineralisation using the example of zebra mussel shells.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: Investigation of Infrared Thermography of Cortical Bone Grinding in Neurosurgery
Autorzy:: Babbar, Atul
Jain, Vivek
Gupta, Dheeraj
Goyal, Kapil Kumar
Prakash, Chander
Saxena, Kuldeep Kumar
Kumar, Sandeep
Bartoszuk, Marian
Tematy:: biomimetic
bone grinding
Infrared thermography
thermal analysis
surfaces
burr; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2201892.pdf Link otwiera się w nowym oknie
Opis:: In this work, an effort has been made to determine the effect of different shape surgical burr on the thermogenesis during bone osteotomy. The abrasion during bone grinding leads to heat generation and subsequently rise in the temperature which may have adverse effects such as osteonecrosis, blood coagulation in the carotid artery, damage to sciatic nerves, and even loss of vision. So, mitigating the temperature rise during bone grinding is of paramount importance. Especially, in endoscopic endonasal approach (EEA) in which nasal passage is used for the inserting the grinding burr and reaching the target region. The miniature abrasion can significantly increase the temperature and hence leads to the thermal damage to nerves surrounding the temporal and frontal lobe. These parts of the brain controls movement, problem solving ability, behavior, personality mood, hearing, language, memory, speech, breathing, heart rate, consciousness etc. Furthermore, neurosurgeons rely on their personal surgical experience for estimating the temperature rise during grinding. However, this is much difficult for novice surgeons. Therefore, it becomes critically important to preserve the soft neural tissues and nerves amid bone grinding. To overcome these concerns, infrared thermography technique has been exploited to determine the possibility of thermogenesis during bone grinding by measuring the temperature rise and its distribution using infrared camera. All experiments have been carried at a constant set of process variables. The grinding zone is continuously flooded with the irrigating solution to remove the heat and bone debris away from the grinding site. It has been observed that convex tool shape generated lower maximum temperature i.e. 46.03 ℃ among all tools. The temperature produced by the convex tool is 12.06% lower than spherical tool, 33.39% lower than cylindrical tool, and 10.55% lower than tree-shape tool. The results showed that convex shape tool could prevent thermal necrosis in the bone as temperature caused (i.e. 46 ℃) was less than the threshold limit of osteonecrosis. Thermograms revealed that infrared thermography technique could be implemented for the in-vivo surgical operations for the measurement of temperature during bone grinding.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Synthetic extracellular matrix as a substrate for regenerative medicine
Autorzy:: Stodolak-Zych, Ewa
Menaszek, Elżbieta
Twardy, Aleksandra
Ścisłowska-Czarnecka, Anna
Boguń, Maciej
Kolesińska, Beata
Tematy:: synthetic extracellular matrix
biomimetic
peptide
polysaccharides
laboratory model; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/285740.pdf Link otwiera się w nowym oknie
Opis:: The work presents materials characteristics of fibrous polysaccharide substrates (calcium alginate, CA) modified with short peptides. Three types of synthesized peptides (hexapeptides) were composed of: cysteine (C) and tryptophan (W) named - (WWC)2or cysteine (C) and tyrosine (Y) named (YYC)2 or phenyloalanine (F) named 6F. The peptides size distribution (DLS method) showed that they agglomerated in an alcohol medium. These results were used to select a modification method of the fibrous substrates i.e. the peptides were deposited on the fibrous alginate substrate by the electrospraying technique. Using this method three kinds of polysaccharide- peptides systems were obtained i.e.: CA/(WWC)2, CA/(YYC)2CA/6F. As a reference material, the pure calcium alginate fibrous substrate was used. The results of modification with short peptides were evaluated via scanning electron microscopy (SEM): small aggregates were observed (40-100 nm) on the surface of fibers, and the fibers size remained the same after modification (11-12 μm). The size of aggregates depended on the kind of short peptide; the smaller (40 nm) aggregates were observed when the peptide had only aromatic chain (6F), the bigger (<100 nm) ones were observed when the peptide had heterocyclic rings in the chain (WWC and YYC). All materials were contacted with osteoblast-like cells (MG-63) to test biocompatibility (cells viability after 3 and 7 days) and the results proved showed higher viability in the polysaccharide-peptide system which increased with the time of observation. The durability of polysaccharide-peptide systems was tested using the enzymatic assay: collagenase confirmed the stability of materials. The progress of degradation rate was observed using infrared spectroscopy (FTIR-ATR) - the ratio on bands with C-O and C-OH increased after degradation under in vitro conditions.Results of the investigations on the fibrous substrates have confirmed that the system is a good model of an extracellular matrix (ECM) due to its chemical composition and microstructure which both have biomimetic characteristics. Thus, it may be used as a filling of bone defects supporting the regeneration of the damaged tissue. Additionally, it may also serve as the model research system of ECM.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Biomimetic Ca-P coatings obtained by chemical/electrochemical methods from Hanks solution on a Ti surface
Autorzy:: Pisarek, M.
Roguska, A.
Marcon, L.
Andrzejczuk, M.
Tematy:: biomaterials
biomimetic
surface analysis
protein adsorption
U2OS cells; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/286157.pdf Link otwiera się w nowym oknie
Opis:: The purpose of this study was to investigate the bioactivity of porous calcium phosphate coatings on titanium prepared using a two-step procedure (chemical etching or anodic oxidation of Ti followed by soaking in simulated body fluid or direct electrodeposition from Hanks' solution). In order to evaluate the potential use of the coatings for biomedical applications, the adsorption of serum albumin, the most abundant protein in the blood, and the attachment of living cells (osteoblasts, U2OS) were studied.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Biomimetyczne napędy podwodnych robotów mobilnych w kontekście rozwoju CyberRyby
Biomimetic drives of underwater mobile robots in context of development of the CyberFish
Autorzy:: Malec, M.
Morawski, M.
Tematy:: podwodne roboty mobilne
napędy biomimetyczne
underwater mobile robots
biomimetic drives; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/277345.pdf Link otwiera się w nowym oknie
Opis:: W artykule autorzy postanowili przedstawić pokrótce rozwiązania napędowe stosowane w klasycznych pojazdach typu ROV/AUV jak również biomimetyczne rozwiązania konstrukcyjne w dziedzinie napędów podwodnych robotów mobilnych. Szczegółowo omówiono problematykę naśladowania sposobu poruszania się ryb okoniokształtnych. Na koniec przedstawiono kierunki możliwego rozwoju CyberRyby jako autonomicznego podwodnego robota mobilnego.
In this paper authors decided to present shortly drives used in classic ROV/AUV as well as biomimetic drives in the field of underwater mobile robots. The way carangiform fish moves was described in details. In the end, directions of development of CyberFish as an autonomous mobile robot has been presented.
Dostawca treści:: Biblioteka Nauki

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