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Wyświetlanie 1-3 z 3
Tytuł:
Rheological aspects of the flow of thermosensitive chitosan systems during injection application
Autorzy:
Rył, Anna
Owczarz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1034161.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan scaffolds
injectability
thermosensitive hydrogels
Opis:
The aim of this paper was to conduct preliminary instrumental tests to determine the possibility of injection applications for thermosensitive chitosan systems, including injection needles and application conditions. Among the many biomedical and pharmaceutical applications of chitosan, the minimally invasive thermosensitive scaffolds that form in vivo are an interesting solution. Despite many studies on colloidal chitosan systems undergoing sol-gel phase transition, almost no studies have examined their injectability. It has been stated that the use of acetic acid as a solvent reduces the forces needed for injection. Moreover, the key impact of injection temperature was determined. Storing the medium at room temperature before the injectability test led to a decrease in the value of forces needed for injection. The obtained results are discussed based on the change of the rheological properties of the chitosan hydrogels.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2020, 25; 201-209
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porous chitosan structures for medical applications
Autorzy:
Tylman, Michał
Mucha, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1035545.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan scaffolds
lyophilization
tissue engineering
Opis:
The aim of the study was to develop preparation methods of porous chitosan structures and to investigate their morphological properties as well as the kinetics of model substance release (salicylic acid). Chitosan scaffolds were generated using the liophylisation method and the systems obtained were saturated with hydroxyapatite and salicylic acid. Microscopic investigations (optical and electron microscopy) were carried out to examine the morphology of structures and water vapour sorption isotherms were determined to define the influence of hydroxyapatite on the system sorption ability. Additionally, the kinetic curve for the model substance release process (the process of the 1st order) was determined.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 97-106
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of texture profile analysis to investigate the mechanical properties of thermosensitive injectable chitosan hydrogels
Autorzy:
Owczarz, Piotr
Rył, Anna
Wichłacz, Żaneta
Powiązania:
https://bibliotekanauki.pl/articles/1034254.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
TPA
chitosan
hydrogels
injectable scaffolds
mechanical properties
Opis:
In this paper, the mechanical properties of hybrid chitosan hydrogels were investigated using the texture profile analysis test. Scaffolds obtained from a polysaccharide of various molecular weights were studied, which, with the addition of glycerophosphate salt, formed a three-dimensional structure in vivo. The obtained systems were also enriched with collagen and calcium carbonate to improve the mechanical properties. The determined texture parameter values indicate that the mechanical properties of the hybrid hydrogel depend on the molecular weight of the polymer, the type of solvent and, the pH-neutralizing substance, as well as the type and concentration of the filler. Moreover, in some cases the TPA test was the only way to evaluate the mechanical properties of the obtained hydrogels due to the inability to determine the Young's modulus. Consequently, the texture analysis test is a valuable tool for selecting solutions depending on the intended application of the scaffolds.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2019, 24; 151-163
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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