Temat: cellulose-alginate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Functional three-component polymeric biocomposites for the treatment of bedsores
Autorzy:: Wiśniewska-Wrona, Maria
El Fray, Mirosława
Powiązania:: https://bibliotekanauki.pl/articles/1034423.pdf
Data publikacji:: 2018
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: Chitosan
FTIR
NMR
alginate
carboxymethyl cellulose
dressing DSC
Opis:: Presented here are the results of investigations into the preparation of three-component dressing materials from various biopolymers in the form of a single-layer film which is suitable as a carrier for pain-relieving (lidocaine) and bacteriostatic (sulphanilamid) therapeutic agents. Physical-chemical, biological and usable properties of the prepared materials were tested and assessed. The amount of added active substance was adopted based on the dose recommended by the Polish Pharmacopeia for external medicinal preparations. Antibacterial activity against gram (-) Escherichia coli and gram (+) Staphylococcus aureus was assessed in some of the biocomposites by quantitative methods. The cytotoxic action in direct contact with the mouse fibroblast NCTC clone 929 was also estimated. Thermal analysis (DSC), infrared spectrophotometry (FTIR) and nuclear magnetic resonance spectroscopy were employed to investigate the impact of the variable contents of chitosan, alginate, carboxymethyl cellulose (CMC), and the active substance upon the chemical- and phase-structure of the prepared three-component polymeric biocomposites. It was found that the quantitative composition of the biocomposites and the additive of active substances lidocaine and sulphanilamide exert a vital impact upon their physical-mechanical and usable properties (imbibition, absorption). Investigations into the release of the medicinal substance from the investigated biocomposites to an acceptor fluid led to the conclusion that the kinetics of the process may be described by a complex first order rate equation with two exponential functions.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 185-206
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Are agricultural and natural sources of bio-products important for modern regenerative medicine? A review
Autorzy:: Nowacki, Maciej
Nowacka, Katarzyna
Kloskowski, Tomasz
Pokrywczyńska, Marta
Tyloch, Dominik
Rasmus, Marta
Warda, Karolina
Drewa, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/989866.pdf
Data publikacji:: 2017
Wydawca:: Instytut Medycyny Wsi
Tematy:: cellulose
plant extract
alginate
chitosan
porcine scaffold
small intestine submusocsa (sis)
bladder acellular matrix (bam)
Opis:: Introduction and objectives. As tissue engineering and regenerative medicine have continued to evolve within the field of biomedicine, the fundamental importance of bio-products has become increasingly apparent. This true not only in cases where they are derived directly from the natural environment, but also when animals and plants are specially bred and cultivated for their production. Objective. The study aims to present and assess the global influence and importance of selected bio-products in current regenerative medicine via a broad review of the existing literature. In particular, attention is paid to the matrices, substances and grafts created from plants and animals which could potentially be used in experimental and clinical regeneration, or in reconstructive procedures. Summary. Evolving trends in agriculture are likely to play a key role in the future development of a number of systemic and local medical procedures within tissue engineering and regenerative medicine. This is in addition to the use of bio-products derived from the natural environment which are found to deliver positive results in the treatment of prospective patients.
Źródło:: Annals of Agricultural and Environmental Medicine; 2017, 24, 2
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Poszukiwanie prostych modeli do badania adhezji bakterii probiotycznych
Searching for simple models to study the adhesion of probiotic bacteria
Autorzy:: Czaczyk, K
Olejnik, A
Miezal, P
Grajek, W
Powiązania:: https://bibliotekanauki.pl/articles/828476.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Technologów Żywności
Tematy:: bakterie probiotyczne
adhezja bakterii
Lactobacillus casei
Lactobacillus acidophilus
Lactobacillus rhamnosus
metody badan
alginiany
karageny
kolagen
karboksymetyloceluloza
zdolnosci adhezyjne
probiotic bacteria
bacterial adhesion
test method
alginate
carrageenan
carboxymethyl cellulose
adhesive ability
Opis:: Przeprowadzono studia porównawcze nad możliwością zastąpienia w badaniach adhezji bakterii mlekowych modelu kultury komórek nabłonka jelitowego innymi uproszczonymi modelami. Badano przyczepność bakterii probiotycznych Lactobacillus casei Shirota ATCC 39539, Lactobacillus acidophilus LC1 oraz Lactobacillus rhamnosus GG ATCC 53103 do membran wykonanych z alginianu, karagenu, żelatyny, kolagenu, szkła, polistyrenu i karboksymetylocelulozy. Zaobserwowano największy stopień przyczepności bakterii probiotycznych do membran wykonanych z karboksymetylocelulozy i kolagenu. W większości wariantów doświadczeń liczba przyczepionych komórek bakteryjnych wzrastała wraz ze wzrostem czasu ich kontaktu z powierzchnią stałą. Wykazano także różnice w przyczepności komórek do hydrożeli o różnych stężeniach. Na podstawie przeprowadzonych badań można stwierdzić, że stopień adhezji bakterii probiotycznych do różnych powierzchni organicznych i nieorganicznych jest cechą zaleną od szczepu mikroorganizmu. Żaden z prostych modeli adhezyjnych, zastosowanych w tej pracy, nie charakteryzował się adhezyjnością porównywalną z komórkami nabłonka jelitowego Caco-2 i HT-29, stosowanego obecnie jako główny model in vitro do badań adhezji bakterii probiotycznych.
Comparative studies were performed on the possibility of replacing intestinal epithelial cells by some other simplified models for the purpose of examining the adhesion of probiotic bacteria. The adhesion of Lactobacillus casei Shirota ATCC 39539, Lactobacillus acidophilus LC1, and Lactobacillus rhamnosus GG ATCC 53103 to surfaces of alginate, carrageenan, gelatin, collagen, glass, polystyrene, carboxymethylcellulose, and to intestinal epithelial cells (Caco-2 and HT-29 lines) were tested. Among the examined solid surfaces, the highest degree of adhesion was observed in the case of carboxymethylcellulose and collagen. In the majority of experimental variants, the number of bacterial cells adhering to surfaces increased parallel to the time of their contacting a solid surface. Additionally, there were stated differences in the cell adhesion to hydrogels showing varying concentration rates. On the basis of the experiments performed, it is possible to state that the adhesion degree of probiotic bacteria to various inorganic and organic surfaces is a parameter that depends on the strain of a microorganism. Among all the simplified models applied in the studies in question, no one was marked by an adhesion rate comparable to the adhesion of intestinal epithelial cells Caco-2 and HT-29, which are, nowadays, used as a major model in vitro while investigating the adhesion of probiotic bacteria.
Źródło:: Żywność Nauka Technologia Jakość; 2005, 12, 1; 84-96
1425-6959
Pojawia się w:: Żywność Nauka Technologia Jakość
Dostawca treści:: Biblioteka Nauki

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