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    Wyświetlanie 1-13 z 13
    Tytuł:
    Chitosan hydrogels modified with silk, graphene oxide or reduced graphene oxide
    Autorzy:
    Szaraniec, Barbara
    Boruchowski, Marcin
    Gryń, Karol
    Chłopek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1844967.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    nanocomposites
    chitosan
    hydrożele
    nanokompozyty
    Źródło:
    Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 44
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chitosan hydrogels modified with silk, graphene oxide or reduced graphene oxide
    Autorzy:
    Szaraniec, Barbara
    Boruchowski, Marcin
    Gryń, Karol
    Chłopek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1844881.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    nanocomposites
    chitosan
    hydrożele
    nanokompozyty
    chitozan
    Źródło:
    Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 44
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and characterization of graphene-loaded chitosan hydrogels with cross-linking gradient
    Autorzy:
    Kosowska, K.
    Domalik-Pyzik, P.
    Chłopek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/285566.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    chitosan
    nanocomposites
    Źródło:
    Engineering of Biomaterials; 2018, 21, 148; 40
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of physicochemical and rheological properties of chitosan hydrogels based on selected hydroxyacids
    Autorzy:
    Zavyalova, Olga
    Gajewska, Sandra
    Dąbrowska-Wisłocka, Dominika
    Sionkowska, Alina
    Powiązania:
    https://bibliotekanauki.pl/articles/1844766.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Źródło:
    Engineering of Biomaterials; 2021, 24, 163; 92
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acceleration of gelation and promotion of mineralization of chitosan hydrogels by alkaline phosphatase
    Autorzy:
    Douglas, T. E. L.
    Skwarczyńska, A.
    Modrzejewska, Z.
    Balcaen, L.
    Schaubroeck, D.
    Lycke, S.
    Vanhaecke, F.
    Vandenabeele, P.
    Dubruel, P.
    Jansen, J. A.
    Leeuwenburgh, S. C. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/284363.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    chitosan
    thermosensitivity
    composite
    mineralization
    Opis:
    Thermosensitive chitosan hydrogels containing sodium beta-glycerophosphate (ß-GP), whose gelation is induced by increasing temperature to body temperature, were functionalized by incorporation of Alkaline Phosphatase (ALP), an enzyme involved in mineralization of bone. ALP incorporation led to acceleration of gelation upon increase of temperature for four different chitosan preparations of differing molecular weight, as demonstrated by rheometric time sweeps at 37°C. Hydrogels containing ALP were subsequently incubated in calcium glycerophosphate (Ca-GP) solution to induce their mineralization with calcium phosphate (CaP) in order to improve their suitability as materials for bone replacement. Incorporated ALP retained its bioactivity and induced formation of CaP mineral, as confirmed by SEM, FTIR, Raman spectroscopy, XRD, ICP-OES, and increases in dry mass percentage, which rose with increasing ALP concentration and incubation time in Ca-GP solution. The results demonstrate that ALP accelerates formation of thermosensitive chitosan/ß-GP hydrogels and induces their mineralization with CaP, which paves the way for applications as injectable bone replacement materials.
    Źródło:
    Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 135-136
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of graphene oxide-loaded chitosan hydrogels and their application for 3D printing
    Autorzy:
    Domalik-Pyzik, P.
    Chłopek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/286115.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    graphene
    chitosan
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 83
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of physicochemical and rheological properties of chitosan hydrogels based on selected hydroxy acids
    Autorzy:
    Zavyalova, Olga
    Gajewska, Sandra
    Dąbrowska-Wisłocka, Dominika
    Sionkowska, Alina
    Powiązania:
    https://bibliotekanauki.pl/articles/2058389.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    chitosan
    lactobionic acid
    mandelic acid
    rheology
    FTIR spectra
    chitozan
    reologia
    hydrożele
    Opis:
    Chitosan is a natural cationic polymer that dissolves in an acidic environment and forms gels. Its properties depend on the degree of deacetylation and molecular weight. It is a bioactive compound with antibacterial and film-forming properties that allow to increase the regenerative capacity of the skin. Moreover, it is biodegradable, biocompatible, non-toxic, and stable. In this research, chitosan was combined with mandelic and lactobionic acids which are characterized by biological activity and low toxicity. This combination not only has a positive effect on the chitosan solubility, but it also allows to obtain new biomaterials whose positive features of the base ingredients are enhanced by their synergistic effect. The obtained hydrogels were assessed regarding the interaction of chitosan and hydroxy acid molecules, and the stability of the resulting structures was examined. The research was performed by using rheological methods and IR spectroscopy. Chitosan hydrogels made with mandelic acid are characterized by higher viscosity values, as compared to hydrogels containing lactobionic acid. The samples of the obtained hydrogels stored for 7 days showed no signs of degradation and their viscosity values were constantly increasing, which proves the ongoing process of creating new bonds between hydroxy acid molecules and chitosan chains. After this time, the hydrogels with mandelic acid revealed higher viscosity values in comparison to hydrogels made with lactobionic acid. Based on the obtained IR spectra, the shifts of the characteristic chitosan bands as a result of interaction with the tested hydroxy acids were analyzed.
    Źródło:
    Engineering of Biomaterials; 2021, 24, 161; 2--7
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of novel chitosan nanocomposite hydrogels for drug delivery and bone tissue engineering
    Autorzy:
    Pazdan, K.
    Pielichowska, K.
    Chłopek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/285119.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    nanocomposites
    tissue engineering
    hydrogels
    Opis:
    Biodegradable materials for drug delivery and bone tissue engineering are currently intensively developing and improving, but there are still a lot of problems to solve related with bioactivity, biocompatibility, release profile etc. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed cells of mesenchymal origin that exhibit osteoblastic differentiation and produce malignant osteoid. It is the most common histological form of primary bone cancer [1,2]. Treatment is most destinations and made up for: intensive multidrug short induction chemotherapy, amputation or tumor resection within the limits of normal tissue and in the last phase again chemotherapy. This kind of neoplasm is most recently detected in young male till 25 age, therefore improving methods of treatment is so important. Chitosan is a natural-based polymer obtained by alkaline deacetylation of chitin received from powdered shrimp shells was purchased from Acros Organics. Its main advantages are non-toxic, non-immunogenic, non-carcinogenic degradation products, biocompatible, bioactive and biodegradable. These properties cause chitosan a very good candidate for novel hydrogel drug delivery systems. Chitosan easily forms hydrogel particles and entraps biomolecules through a number of mechanisms, including chemical crosslinking, ionic crosslinking, and ionic complexation [3,4]. A possible alternative of chitosan by the chemical modification also has been useful for the association of bioactive molecules to polymer and controlling the drug release profile. There are few methods of modification, or example.: copolimerization, grafting, chemical and ionic crosslinking, polyelectrolyte complexes, etc [5]. Previous studies demonstrated that chitosan could promote the proliferation and osteogenesis but only with moderate swelling ratio of composite, too high ability of entrapment water solutions are not recommended. There are a lot of advantages in chitosan properties that can be used in research work to obtain the material of the best expected properties. Laponite® (LA) is a plate-like synthetic clay hectoritetype belongs to a family of phyllosolicates type 2:1 [6]. Its structure represent empirical formula: Na0.7+[Si8Mg5.5Li0.3 O20(OH)4]0.7-. The plates size is about 25 nm x 0,92 nm. LA has a large surface area, anionic surface charges and exchangeable Na+ cations in hydrated interlayers. Presence of sodium cations causes better adsorption properties for cationic drug molecules. Moreover, the exfoliated LA particles may act as multifunctional crosslinkers in forming the nanocomposite hydrogels, and the polymer chains were anchored to the particles and entangled to form a network [7]. Used synthetic clay has got the same type structure and but better sorption properties to montmorillonite but it has got serious advantage - as a synthetic compound shows low heavy metal content. The initial results indicate that the incorporation of clay improved the swelling behavior in contrast to the pure chitosan beads. There also had been revealed significant disproportion of viscosity received hydrogels according to different type of LA or different concentration. Increasing content causes telling rise of viscosity, especially reported in higher content of used crosslinker. The aim of research is to develop a bioactive system biopolymer/layered silicate intelligent nanocomposite based on chitosan and synthetic clay by a cross-linking reaction using sodium tripolyphosphate as the gel factor. The resultant composite were characterized by Fourier transform infrared spectroscopy, scanning electronic microscope and X-ray diffraction analysis. The bioactivity in physiological pH solution (SBF pH=7.40) [8], drug encapsulation efficiency and controlled release behaviour were also investigated by using the model drug to reveal the effects of introduced LA.
    Źródło:
    Engineering of Biomaterials; 2013, 16, no. 122-123 spec. iss.; 1-2
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Double crosslinking of chitosan/vanillin hydrogels as a basis for mechanically strong gradient scaffolds for tissue engineering
    Autorzy:
    Hunger, Martyna
    Domalik-Pyzik, Patrycja
    Reczyńska, Katarzyna
    Chłopek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1844976.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogel
    chitosan
    vanillin
    tripolyphosphate
    tissue engineering
    Opis:
    Polysaccharides, such as chitosan (CS), are widely used in many biomedical applications. However, they require crosslinking agents to achieve chemical stability and appropriate mechanical properties. In this work, chitosan-based hydrogels were crosslinked using vanillin and/or sodium tripolyphosphate, as chemical and physical crosslinking agents, respectively. Microstructural (digital microscope, SEM), structural (FTIR-ATR), mechanical (static compression test), and in vitro biological (chemical stability and swelling ratio in PBS, cytotoxicity) properties of the obtained materials were evaluated to assess materials potential as biomedical scaffolds. The optimal ratio of vanillin to chitosan (DD = 89%) to crosslink the polymer was found to be 1.2:1. Moreover, the double crosslinking with vanillin caused a two-time increase in the compression strength of the samples and led to the slower biodegradability. Cytotoxicity studies showed that the cells prefer double vanillin crosslinked hydrogels over those treated with TPP. Further studies, such as bioactivity are required to determine the specific functionality of the hydrogels and the specific tissue which may be treated with the tested materials. The optimal material was chosen to the next step of the study, which may be obtaining composite hydrogels with hydroxyapatite and/or graphene oxide to tailor or improve properties towards specific tissue regeneration.
    Źródło:
    Engineering of Biomaterials; 2020, 23, 155; 2-11
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties of hydrogels in a chitosan/ silk/graphene system
    Autorzy:
    Boruchowski, Marcin
    Gryń, Karol
    Szaraniec, Barbara
    Chłopek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1844939.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    chitosan
    mechanical properties
    hydrożele
    właściwości mechaniczne
    Źródło:
    Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 45
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties of hydrogels in a chitosan/ silk/graphene system
    Autorzy:
    Boruchowski, Marcin
    Gryń, Karol
    Szaraniec, Barbara
    Chłopek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1844879.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    chitosan
    mechanical properties
    hydrożele
    chitozan
    właściwości mechaniczne
    Źródło:
    Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 45
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of thermosensitive hydrogels of chitosan, sodium and magnesium glycerophosphate for bone regeneration applications
    Autorzy:
    Liškova, J.
    Bačakova, L.
    Skwarczyńska, A.
    Musiał, O.
    Bliznuk, V.
    De Schampelhaere, K.
    Modrzejewska, Z.
    Douglas, T. E. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/284238.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    bone regeneration
    chitosan
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 44
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chitosan microcapsules obtained by wet method as potential carriers for active substance
    Autorzy:
    Startek, J.
    Dzierzkowska, E.
    Golańska, J.
    Stodolak-Zych, E.
    Rapacz-Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/283823.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    hydrogels
    biomaterials
    chitosan
    Źródło:
    Engineering of Biomaterials; 2018, 21, 148; 92
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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