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Wyniki wyszukiwania dla: CHITOSAN FILM
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Influence of nitrogen plasma treatment on the wettability of polyetheretherketone and deposited chitosan layers
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Temperature-dependent interactions in the chitosan/cyclosporine A system at liquid–air interface
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Physicochemical Characteristics of Chitosan–TiO2 Biomaterial. 1. Stability and Swelling Properties
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Characteristics of Hybrid Bioglass-Chitosan Coatings on the Plasma Activated PEEK Polymer
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Low-temperature air plasma modification of chitosan-coated PEEK biomaterials
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Effect of low-temperature plasma on chitosan-coated PEEK polymer characteristics
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CHARACTERIZATION OF MIXED LANGMUIR MONOLAYERS OF CYCLOSPORINE A WITH THE PHOSPHOLIPID DPPC AT THE CHITOSAN SUBPHASE
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Green and sustainable hydrogels based on quaternized chitosan to enhance wound healing
PublikacjaHydrogel-based biomaterials applied as wound dressings provide the wound with a moist environment, which facilitates tissue regeneration through granulation and re-epithelialization. The inherent flexibility and adjustable architecture of hydrogels enables incorporation of cells, antimicrobial drugs, growth factors, and bioactive compounds, which leads to expediting wound contraction and enhancing the regeneration process. The...
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Chitosan-based electrospun nanofibers for encapsulating food bioactive ingredients: A review
PublikacjaToday, society has been more aware of healthy food products and related items containing bioactive compounds, which potentially contribute to human health. Unfortunately, the long-term stability and bioactivity of biologically active compounds against environmental factors compromise their target and effective action. In this way, lab-designed vehicles, such as nanoparticles and nanofibers, provide enough properties for their preservation...
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Chitosan/poly(4-vinylpyridine) coatings formed on AgNPs-decorated titanium
PublikacjaElectrophoretic deposition (EPD) of chitosan/poly(4-vinylpyridine) (chit/P4VP) coatings on titanium substrates previously decorated with silver nanoparticles (AgNPs) was performed at different content of P4VP in the suspension and different voltage values. The results revealed that the composite coatings were formed, well-adjacent to the titanium substrate, of suitable roughness, hydrophilicity, and corrosion resistance. The voltage...
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Effects of the Origin and Deacetylation Degree of Chitosan on Properties of Its Coatings on Titanium
PublikacjaThe properties of chitosan coatings on titanium surfaces may be influenced by a variety of factors, including their chemical characteristics and the deposition method. The aim of this research was to determine the influence of a chitosan’s origin (a type of shrimp) and deacetylation degree (DD), when deposited on a very smooth titanium surface, on adhesion and biological behavior. The tests were performed using chitosan of a degree...
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Preparation and characterization of porous scaffolds from chitosan-collagen-gelatin composite
PublikacjaNovel porous scaffolds composed of chitosan, collagen and gelatin were prepared and characterized. For preparing scaffolds gelatin and collagen isolated from fish skins with various physicochemical properties were used. In order to reduce preparation solubility glutaraldehyde in the amount of 1%, w/w relative to the total biopolymers weight in solution was used. All obtained biomaterials showed a homogeneous porosity. Protein polymer...
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Antibacterial evaluation of bioactive modifiers of bone cements: antibiotics, nanometals and chitosan
PublikacjaModern biomaterials in addition to their basic tasks, can serve as carriers of active substance. The release of a bioactive particles allows to locally fight infection or its prevent it. Bone cements additionally to their basic applications in orthopedic surgery can also serve to deliver locally active substances. Currently, only antibiotics are routinely used as modifiers for bone cements. Bioactive bone cements constitute...
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Investigations of a new humidity sensor with polymer film
PublikacjaPrzedstawiono wyniki badań impedancyjnych nowego czujnika wilgotności z filmem polimerowym. Jako polimer wykorzystano chemicznie modyfikowaną polietylenoiminę.
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Film na szosie : Zagospodarowanie wód opadowych
PublikacjaOdwodnienie nawierzchni drogowej. Problem skuteczności i bezpieczeństwa. Ochrona przed tworzeniem się na powierzchni filmu.
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Thick film Lisicon sensor with gold electrodes.
PublikacjaW pracy przedstawiono preparatykę i badania czujnika gazowego na bazie litowego jonoprzewodzącego elektrolitu stałego. Czujnik został przygotowany w technologii grubowarstwowej. Jego zasada działania polega na pomiarze prądu elektrycznego w czasie liniowych zmian napięcia. Charakterystyki prądowo-napięciowe czujnika mają unikalny kształt, zależny od rodzaju gazu oraz jego koncentracji. Pomiary wykonano w mieszaninach dwutlenku...
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The influence of UV-radiation on hyaluronic acid and its blends with addition of collagen and chitosan
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INFLUENCE OF THE INTERMOLECULAR INTERACTION ON PHYSICO-CHEMICAL PROPERTIES OF CHITOSAN/HYALURONIC ACID BLENDS
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The miscibility of collagen/hyaluronic acid/chitosan blends investigated in dilute solutions and solids
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Effect of UV radiation and chitosan coating on the adsorption-photocatalytic activity of TiO2 particles
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Scaffolds Loaded with Dialdehyde Chitosan and Collagen—Their Physico-Chemical Properties and Biological Assessment
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CHITOSAN-DERIVATIVES IN COMBINATIONS WITH SELECTED PORPHYRINOIDS AS NOVEL HYBRID MATERIALS FOR MEDICINE AND PHARMACY
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Electrophoretic Deposition and Characteristics of Chitosan–Nanosilver Composite Coatings on a Nanotubular TiO2 Layer
PublikacjaThe surface treatment of titanium implants has been applied mainly to increase surface bioactivity and, more recently, to introduce antibacterial properties. To this end, composite coatings have been investigated, particularly those based on hydroxyapatite. The present research was aimed at the development of another coating type, chitosan–nanosilver, deposited on a Ti13Zr13Nb alloy. The research comprised characterization of the...
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Electrophoretic Deposition and Characterization of Chitosan/Eudragit E 100 Coatings on Titanium Substrate
PublikacjaCurrently, a significant problem is the production of coatings for titanium implants, which will be characterized by mechanical properties comparable to those of a human bone, high corrosion resistance, and low degradation rate in the body fluids. This paper aims to describe the properties of novel chitosan/Eudragit E 100 (chit/EE100) coatings deposited on titanium grade 2 substrate by the electrophoretic technique (EPD). The deposition...
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Tin Oxide Encapsulated into Pyrolyzed Chitosan as a Negative Electrode for Lithium Ion Batteries
PublikacjaTin oxide is one of the most promising electrode materials as a negative electrode for lithium-ion batteries due to its higher theoretical specific capacity than graphite. However, it suffers lack of stability due to volume changes and low electrical conductivity while cycling. To overcome these issues, a new composite consisting of SnO2 and carbonaceous matrix was fabricated. Naturally abundant and renewable chitosan was chosen...
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Chitosan-protein scaffolds loaded with lysostaphin as potential antistaphylococcal wound dressing materials.
PublikacjaAIMS: The development of technology for preparing chitosan-protein scaffolds loaded with lysostaphin, which potentially could be used as dressing for wound treatment and soft tissue infections caused by Staphylococcus aureus. METHODS AND RESULTS: The unique technology of chitosan solubilization using gaseous CO(2) instead of organic or inorganic acids was used for the incorporation of lysostaphin, the enzyme that exhibits bactericidal...
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Effect of wear on EHD film thickness in sliding contacts
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Optical absorption studies of (Ga0.1In0.9)2Se3 thin film
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Optical absorption studies of (Ga0.1In0.9)2Se3 thin film
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The model of photovoltaic phenomenon in thin inhomogeneously organic film
PublikacjaW pracy przedstawiono model zjawiska fotowoltaicznego w obecności gradientu pułapek nośników ładunku. Zakładając, że długość dyfuzji ekscytonów związana jest z koncentracją pułapek, wykazano, że napięcie fotowoltaiczne silnie zależy od gradientu koncentracji pułapek.
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Optimization of working conditions of thick-film LSFO bolometers
PublikacjaPrzedstawiono opracowaną przez autorów metodę wytwarzania bolometrów w technologii LTCC. Jako warstwy aktywne wykorzystano niestechiometryczne tlenki lantanowo-strontowo żelazowe (LSFO). Przedstawiono wyniki pomiarów wybranych właściwości bolometrów oraz charakterystyki wykorzystane w procesie doboru punktu pracy bolometru.
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Thick - film and LTCC multicontact resistors - preliminary results
PublikacjaW artykule zaprezentowano i skomentowano wstępne wyniki elektryczxnych i geometrycznych charakterystyk wielokontaktowychstruktur rezystywnych wykonanych w technologiigrubowarstwowej i LTCC ( ceramicznej z niską temperatura wypadaniz). Realizowane struktury miały rozmiary od 200 x 100 μm2 do 1500 x 500 μm2 i 3 lub 6 kontaktów rozmieszczonych e różny sposób na obwodzie warstwy rezystywnej.
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Classifying Emotions in Film Music - A Deep Learning Approach
PublikacjaThe paper presents an application for automatically classifying emotions in film music. A model of emotions is proposed, which is also associated with colors. The model created has nine emotional states, to which colors are assigned according to the color theory in film. Subjective tests are carried out to check the correctness of the assumptions behind the adopted emotion model. For that purpose, a statistical analysis of the...
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DEVELOPMENT OF THE ALGORITHM OF POLISH LANGUAGE FILM REVIEWS PREPROCESSING
PublikacjaThe algorithm and the software for conducting the procedure of Preprocessing of the reviews of films in the Polish language were developed. This algorithm contains the following steps: Text Adaptation Procedure; Procedure of Tokenization; Procedure of Transforming Words into the Byte Format; Part-of-Speech Tagging; Stemming / Lemmatization Procedure; Presentation of Documents in the Vector Form (Vector Space Model) Procedure; Forming...
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Physico-chemical properties of three-component mixtures based on chitosan, hyaluronic acid and collagen
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Langmuir monolayer study of phospholipid DPPC on the titanium dioxide–chitosan–hyaluronic acid subphases
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Chitosan/phospholipid coated polyethylene terephthalate (PET) polymer surfaces activated by air plasma
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Characteristics of hybrid chitosan/phospholipid-sterol, peptide coatings on plasma activated PEEK polymer
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Effect of chitosan on the interactions between phospholipid DOPC, cyclosporine A and lauryl gallate in the Langmuir monolayers
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Effect of Chitosan Deacetylation on Its Affinity to Type III Collagen: A Molecular Dynamics Study
PublikacjaThe ability to form strong intermolecular interactions by linear glucosamine polysaccharides with collagen is strictly related to their nonlinear dynamic behavior and hence bio-lubricating features. Type III collagen plays a crucial role in tissue regeneration, and its presence in the articular cartilage affects its bio-technical features. In this study, the molecular dynamics methodology was applied to evaluate the effect of...
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The Chitosan-Based System with Scutellariae baicalensis radix Extract for the Local Treatment of Vaginal Infections
PublikacjaScutellarie baicalensis radix, as a flavone-rich source, exhibits antibacterial, antifungal, an-tioxidant, and anti-inflammatory activity. It may be used as a therapeutic agent to treat various
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Impact of chitosan/noble metals-based coatings on the plasmochemically activated surface of NiTi alloy
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Research of chitosan coatings deposited by electrophoretic deposition method at various voltage and time parameters
PublikacjaThe aim of this research is to estimate the electrophoretic deposition main parameters, such as voltage and time duration, that will provide optimal characteristics of the surface layer. Chitosan coatings were synthesized on biomedical Ti13Zr13Nb alloys at 20 V and 30 V and with deposit times of 2min, 5 min, 10 min, and 15 min. Evaluation of the coating was performed by using Scanning Electron Microscope (SEM), Energy-Dispersive...
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Polyurethanes modified with natural polymers for medical application. I. Polyurethanes/ Chitosan and polyurethane/collagen.
PublikacjaFor over three decades polyurethanes (PUR or PU) have been reported for application in a variety of medical devices. These polymers consist of hard and soft segments, which allow for more subtle control of their structure and properties. By varying the composition of the different segments, properties of PURcan be tuned up for use in many areas of medicine. Recently there is a great interest in modification of biomedical PUR with...
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A novel method for drop in drop edible oils encapsulation with chitosan using a coaxial technique
PublikacjaThe presented work concerns a novel one step method for oil encapsulation. In this coaxial system the oil constitutes the core of the capsule, while the chitosan solution is the polymer shell surrounding the core to provide separation of the core from the external environment. The paper contains a diagram of the encapsulation equipment and explains the principle of its operation. The experimental results showed the impact of the...
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The Drop-in-Drop Encapsulation in Chitosan and Sodium Alginate as a Method of Prolonging the Quality of Linseed Oil
PublikacjaNowadays, the encapsulation of sensitive products by various techniques has become popular as a promising preservation method. In particular, this applies to oils with a high content of unsaturated fatty acids and a high susceptibility to deterioration. This work presents the possibility of using a chitosan and sodium alginate in the form of a hydrogel membrane to protect food ingredients such as linseed oil, which is stored in...
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Study of NaCl permeability through a non-porous polypropylene film
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Evaluation of conductive-to-resistive layers interaction in thick-film resistors
PublikacjaSpektroskopia szumowa w zakresie małych częstotliwości jest używana do badania oddziaływania warstwy rezystywnej i przewodzącej w wytwarzanych rezystorach grubowarstwowych. Wprowadzono dwa parametry szumowe do określania stopnia tego oddziaływania. Opisano wyniki przeprowadzonych badań oddziaływania warstw z dwutlenku rutenu, rutenku bizmutu z kontaktami ze złota, platyna-złoto, pallad-srebro, od różnych producentów.
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Numerical modelling and experimental verification of compressible squeeze film pressure
PublikacjaThe validity of using the Reynolds equation for compressible squeeze film pressure was tested with computational fluid dynamics (CFD). A squeeze film air bearing was instrumented with pressure sensors and non-contacting displacement probes to provide transient measurements of film thickness and pressure. The film thickness measurements also provided input parameters to the numerical prediction. However, numerical results showed...
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Optical measurements for thin oil film investigation in rheometric processes.
PublikacjaPrzedmiotem badań jest pomiar parametrów cienkiej warstwy oleju silikonowego AK106, powstającej na ścianach dyszy w trakcie procesu reologicznego wyciskania do form past ceramicznych, przygotowywanych ze sproszkowanego tlenków wodorotlenków AlOOH oraz oleju AK106. Parametrami badanymi były: grubość warstwy oleju, charakterystyka reflektancyjna pasty oraz skład mieszaniny. Przedstawione zagadnienie ma istotne znaczenie dla rozwoju...