Temat: chitosan-alginate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Advanced cellulosic materials
Autorzy:: Brzoza-Malczewska, Kinga
Kucharska, Magdalena
Wiśniewska-Wrona, Maria
Guzińska, Krystyna
Jóźwicka, Jolanta
Bacciarelli-Ulacha, Anna
Powiązania:: https://bibliotekanauki.pl/articles/1034809.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: cellulosicproducts
chitosan
complex chitosan/alginate
nanoparticles
Opis:: Aim of the work was to prepare a method of producing chitosan and chitosan-alginate nanoparticles designed for the modification of textile cellulosic products in hygiene and medical application. Spectrophotometry was used in the estimation of the prepared nanoparticles; analyzed, too, was the particle size and antibacterial and antifungal activity.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 7-17
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Modified Cellulose Products for Application in Hygiene and Dressing Materials (Part I)
Modyfikacja produktów celulozowych dla zastosowań higienicznych i opatrunkowych
Autorzy:: Brzoza-Malczewska, K.
Kucharska, M.
Wiśniewska-Wrona, M.
Guzińska, K.
Ulacha-Bacciarelli, A.
Powiązania:: https://bibliotekanauki.pl/articles/233184.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: cellulosic products
nanoparticles
chitosan
chitosan/alginate Na/Ca complex
produkty celulozowe
nanocząstki
kompleks chitozan/alginanNa/Ca
Opis:: Modification of commercial cellulose products commonly used in homes and hospitals was the main purpose of the research herein presented. Enhanced moisture sorption and antimicrobial properties were conferred upon regular commercial gauze. Nanoparticles of microcrystalline chitosan and complex chitosan/alginateNa/Ca were used in the modification. A method was elaborated for the preparation of polymeric materials with a particle size below 1 μm by means of an ultrasonic reactor (Hielscher UP 200S). Modified commercial dressing materials were obtained charecterised by a largely increased absorption capacity, thus easing the transportation of moisture to the outside of the dressing and providing an environment optimal for wound healing. Thanks to the internal surface developed and adequately selected composition, the modified cellulosic materials exhibit antibacterial and antifungal properties.
Głównym celem przeprowadzonych badań była modyfikacja komercyjnego materiału celulozowego w postaci gazy opatrunkowej, stosowanej w codziennym użytku jak i w szpitalach, celem nadania im zwiększonej zdolności sorpcji wilgoci jak i właściwości przeciwmikrobowych. Do modyfikacji surowca wykorzystano nano-cząsteczki mikrokrystalicznego chitozanu oraz kompleksu chitozan/alginanNa/Ca. Metodę otrzymywania polimerów o rozmiarach cząstek o wielkości poniżej 1 μm opracowano przy wykorzystaniu reaktora ultradźwiękowego. Otrzymano modyfikowane handlowe materiały opatrunkowe o kilkukrotnie wyższej zdolności sorpcyjnej, które ułatwiają odprowadzanie wilgoci na zewnątrz opatrunku i zapewniają optymalne środowisko gojenia się ran. Modyfikowane materiały celulozowe dzięki rozwiniętej powierzchni wewnętrznej i odpowiednio dobranym składzie charakteryzują się właściwościami przeciwbakteryjnymi oraz przeciwgrzybowymi.
Źródło:: Fibres & Textiles in Eastern Europe; 2015, 3 (111); 126-132
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: The evaluation of resorbable haemostatic wound dressings in contact with blood in vitro
Autorzy:: Szymonowicz, M.
Kucharska, M.
Wiśniewska-Wrona, M.
Dobrzyński, M.
Kołodziejczyk, K.
Rybak, Z.
Powiązania:: https://bibliotekanauki.pl/articles/306978.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: opatrunek
chitozan
alginian
mikrofibrydy
nanofibrydy
hemoliza
haemostatic
dressing
chitosan-alginate
nanofibrids
microfibrids
haemolysis
plasmatic clotting system
Opis:: Purpose: For many years research has been conducted on the development of resorbable, polymer, haemostatic materials designed to provide first aid and preliminary protection of injuries. The biological properties in vitro of a dressing in powder form called Hemoguard are expected to provide the ability to instantaneously stem bleeding with safe conditions of use. The aim of the study was to evaluate the haemostatic properties of a model of dressing based on micro- and nanofibrids of the chitosan, sodium/calcium alginate and/or carboxymethylcellulose complex. Dressings were prepared by spray-drying and freeze-drying. Methods: Human whole blood was subjected to timed contact with the haemostatic dressing model. Haemolytic action was determined by assaying the degree of haemolysis and evaluating blood cell morphology. Haemostatic action was determined on the basis of selected parameters of plasmatic clotting systems. Results: Dressings prepared by freeze-drying activated the coagulation system. The haemolytic index, plasma haemoglobin concentration values and blood cell morphological shapes were normal. Dressings prepared by spray-drying significantly activated coagulation. Activation of the coagulation process was evidenced by shorter clotting time of the plasma coagulation system and a longer process of clot formation. The dressing was associated with an increased haemolytic index and higher plasma haemoglobin concentration. The morphological shape of blood cells changed. Conclusions: The model of multi-resorbable wound dressings has haemostatic properties. The materials activate the clotting process more quickly than a single-dressing model. Increased activity was found for dressings prepared by spray-drying.
Źródło:: Acta of Bioengineering and Biomechanics; 2017, 19, 1; 151-165
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Pervaporative investigation of ethyl alcohol dehydration
Autorzy:: Gnus, Małgorzata
Dudek, Gabriela
Turczyn, Roman
Tórz, Artur
Łącka, Dorota
Konieczny, Krystyna
Łapkowski, Mieczysław
Powiązania:: https://bibliotekanauki.pl/articles/1035004.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: alginate
chitosan
crosslinking
dehydration
pervaporation
Opis:: Pervaporative separation properties of crosslinked chitosan and alginate membrane on ethanol-water mixture at room temperature was studied. The influence of crosslinking agents on the separation properties were discussed. Selected crosslinking agents were affected differently on used polymer matrices. The better separation properties were obtained for membranes crosslinked by phosphoric (V) acid. The highest pervaporation separation index (309.6 kg/m2·h) and separation factor (52.6) were obtained for phosphoric (V) acid crosslinked alginate membranes, however, the greatest total flux (12.4 kg/m2·h) obtained for phosphoric acid crosslinked chitosan membranes
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 54-63
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Vapour permeation study of water and ethanol through crosslinked chitosan and alginate membranes
Autorzy:: Turczyn, Roman
Gnus, Małgorzata
Dudek, Gabriela
Tórz, Artur
Łącka, Dorota
Strzelewicz, Anna
Łapkowski, Mieczysław
Powiązania:: https://bibliotekanauki.pl/articles/1034919.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: alginate
chitosan
crosslinking agents
vapour permeation
Opis:: A vapour permeation of water and ethanol through homogenous chitosan and alginate membranes was investigated. The influence of the polymer matrix and crosslinking agents, and measurement protocol on the transport properties were discussed. The conducted experiments showed the greater separation factor, better stability and resistant to solvents for chemically crosslinked membranes. On the other hand, stronger association of the matrix, than the physical, caused decrease of vapour fluxes.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 281-288
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Mechanism of water diffusion into noncrosslinked and ionically crosslinked chitosan membranes
Autorzy:: Gierszewska-Drużyńska, Magdalena
Ostrowska-Czubenko, Jadwiga
Powiązania:: https://bibliotekanauki.pl/articles/1035376.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: alginate
chitosan
pH-responsive hydrogels
swelling
tripolyphosphate
Opis:: Ionically crosslinked chitosan membranes were prepared and their swelling behaviour was analysed. Low‑molecular pentasodium tripolyphosphate (TPP) and/or high‑molecular sodium alginate (NaAlg) were used as ionic crosslinkers. Dynamic swelling of noncrosslinked (Ch) as well as singly (Ch/TPP, Ch/NaAlg) and doubly (Ch/NaAlg/TPP) crosslinked chitosan membranes was performed in buffered aqueous solutions of various pH to determine the mechanism of water diffusion into these hydrogels. It was stated out that mechanism of water diffusion into studied chitosan hydrogel membranes depends both on pH of swelling solution as well as on the type of membrane (type of crosslinker). The water transport mechanism was determined to be: i) Fickian or ‘Less Fickian’ diffusion, ii) non‑Fickian diffusion (anomalous diffusion) and iii) Case II or Super Case II diffusion.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 63-70
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Ewaluacja procedury alginanowo-chitozanowo-alginanowej enkapsulacji chondrocytów
Evaluation of alginate-chitosan-alginate chondrocytes encapsulation procedure
Autorzy:: Wasiak, I.
Ciach, T.
Powiązania:: https://bibliotekanauki.pl/articles/285047.pdf
Data publikacji:: 2011
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: mikroenkapsulacja
alginian
chitozan
chondrocyty
microencapsulation
alginate
chitosan
chondrocytes
Opis:: Celem niniejszej pracy była ewaluacja mikroenkapsułek otrzymanych z warstw alginianowo-chitozanowo-alginianowej (ACA) jako matrycy do unieruchamiania chondrocytów. Przygotowanie ACA mikroenkapsułek obejmuje przygotowanie kapsułek z alginianu wapnia, adsorpcji dodatnio naładowanego chitozanu na ich powierzchni, tworząc w ten sposób alginianowo-chitozanową membranę, i ostatecznie wytworzenie wierzchniej alginianowej warstwy. Zbadano własności otrzymanych mikrokapsułek, między innymi ich właściwości mechaniczne, porowatość i szybkość dyfuzji substancji małocząsteczkowej. Kapsułki alginianowe otrzymano za pomocą elektrostatycznej metody generowania kropli. Technika ta wykorzystuje wytłaczanie roztworu alginianu w połączeniu z siłami elektrostatycznymi, które zakłócają powierzchnię cieczy na końcu kapilary / igły, tworząc strumień małych kropelek. Prowadzi to do produkcji jednolitych kulek o małej średnicy.
The objective of this paper was to verify microcapsules obtained from alginate-chitosan-alginate (ACA) system as a matrix for chondrocytes immobilization. Preparation of ACA microencapsules includes formation of the calcium alginate beads, adsorption of a positively charged chitosane on their surface, to form alginate – chitosane membrane, and finally coating with alginate. Properties of obtained microcapsules, their mechanical properties, porosity and diffusion rate were investigated. Electrostatic droplet generation method was employed for microbeads production. This technique employs extrusion combined with electrostatic forces to disrupt a liquid surface at the capillary/needle tip, forming a charged stream of small droplets. This leads to the production of uniform small-diameter beads.
Źródło:: Engineering of Biomaterials; 2011, 14, no. 106-108; 167-171
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

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

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Characteristics of ascorbic acid release from tpp-crosslinked chitosan/alginate polyelectrolyte complex membranes
Autorzy:: Gierszewska, Magdalena
Ostrowska-Czubenko, Jadwiga
Chrzanowska, Ewelina
Powiązania:: https://bibliotekanauki.pl/articles/1034489.pdf
Data publikacji:: 2018
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: alginate
chitosan
drug release
hydrogel
polyelectrolyte complex
tripolyphosphate
Opis:: Chitosan/alginate polyelectrolyte complex membranes (Ch/Alg) additionally cross-linked with tripolyphosphate (TPP) and containing ascorbic acid (AA) were prepared. The dynamic swelling behaviour of Ch/Alg/TPP and ascorbic acid release from the membrane were characterised in different buffer solutions. It has been found that the pH of the buffer solution affects the swelling and release behaviour of AA. Ascorbic acid release, observed over a period of 360 min, exhibited a biphasic pattern, characterised by a fast initial burst release, followed by a slow, sustained release. Different mathematical models were used to study the kinetics and transport mechanism of AA from Ch/Alg/TPP hydrogels. Drug release data were fitted to the zero order kinetic model and first order kinetic model. To characterise the drug mechanism, the release data were fitted to the Higuchi and Korsmeyer-Peppas equations. The initial burst AA release followed zero order kinetics and was quasi-Fickian in nature. The second step of AA release followed first order kinetics.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 76-87
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Hydrogel antibacterial coating for silicone medical devices
Autorzy:: Kopeć, Kamil
Żuk, Michał
Ciach, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/2131510.pdf
Data publikacji:: 2021
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: alginate
antibacterial coatings
chitosan
layer-by-layer
lysozyme
medical devices
Opis:: Effective antibacterial coatings are in demand in medicine, especially for urological medical devices such as catheters and stents. We propose the production method of an antibacterial hydrogel coating on polydimethylsiloxane (PDMS, silicone), a popular surface for medical materials. The coating process consists of the following steps: PDMS surface activation (introduction of hydroxyl groups), silanisation (introduction of amine groups) and application of chitosan/alginate hydrogel with the addition of lysozyme as an antibacterial agent using the layer-by-layer method. We investigated the effect of polyion concentration on the coating mass, swelling ratio and stability. We analysed the adsorption of Micrococcus luteus, Escherichia coli and Proteus rettgeri on a PDMS surface using confocal laser scanning microscopy. The chitosan/alginate hydrogel coating with immobilised lysozyme protected the PDMS surface against adhesion for all three tested bacterial strains.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2021, 26; 135-147
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Synthesis and characterization of chitosan/sodium alginate blend membrane for application in an electrochemical capacitor
Autorzy:: Nowacki, Krzysztof
Galiński, Maciej
Stępniak, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/1034054.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: chitosan
electric double layer capacitor
gel electrolyte
lithium sulfate
sodium alginate
supercapacitor
Opis:: In this work, we report a stepwise formation method of a chitosan/sodium alginate polyelectrolyte complex (CS/SA PEC) membrane. The proposed method aiming at the utilization of the ultrasonic treatment of chitosan and sodium alginate solution allowed us to obtain a highly homogeneous hybrid membrane for electrochemical usage. The CS/SA PEC membrane saturated in a 2 M Li2SO4 aqueous solution was used in electrochemical double layer capacitor (EDLC) cell to study its applicability as quasi-solid electrolyte. Electrochemical characteristic of EDLC cells was determined by electrochemical impedance spectroscopy, cyclic voltammetry and galvanostatic charge/discharge methods. The results show that the EDLC cell with CS/SA PEC quasi-solid electrolyte exhibit a comparable specific capacitance (102 F g-1 for 0–0.8 V) to CS reference (100 F g-1 for 0–0.8 V) and commercial separator (99 F g-1 for 0–0.8 V) cells. Thus, the CS/SA PEC membrane can be considered as an alternative modification for chitosanbased materials of electrochemical purpose.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2020, 25; 174 - 191
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Preparation of chitosan/calcium phosphate based injectable system for guided bone regeneration and its properties investigation
Autorzy:: Bubak, G.
Kowalczyk, M.
Brynk, T.
Bojar, W.
Kucharska, M.
Ciach, T.
Powiązania:: https://bibliotekanauki.pl/articles/115835.pdf
Data publikacji:: 2011
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Tematy:: chitosan
alginate
β-tricalcium phosphate
injectable systems
guided bone regeneration
in vivo studies
biomaterial
Opis:: The main objective of the work was to design and fabricate an injectable biomaterial with osteoconductive properties that can be used in dental applications in peri-implant therapy concerning guided bone regeneration. For that purpose, a self-setting biomaterial consisting of chitosan/tricalcium phosphate microparticles and sodium alginate was formulated. The obtained material was characterized regarding microsphere and formed agglomerates morphology and microstructure. Physical properties, relating to setting time and mechanical properties, were also investigated. Finally, in vivo response to implanted biomaterial was studied on a rat model and compared with commercially available alloplastic material. The results showed that designed injectable biomaterial fulfi lled main requirements for guided bone regeneration application.
Źródło:: Challenges of Modern Technology; 2011, 2, 4; 21-26
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

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

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Comparative study on physicochemical properties of alpha-TCP / calcium sulphate dihydrate biomicroconcretes containing chitosan, sodium alginate or methylcellulose
Autorzy:: Czechowska, Joanna
Zima, Aneta
Ślósarczyk, Anna
Powiązania:: https://bibliotekanauki.pl/articles/307328.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: alpha-tricalcium phosphate
calcium sulphate
chitosan
sodium alginate
methylcellulose
biomicroconcrete
siarczan wapnia
chitozan
alginian sodu
metyloceluloza
Opis:: Recently, the attention has been drawn to complex systems – biomicroconcretes composed of a bone cement matrix and resorbable granules or microspheres. This paper presents novel bone substitutes composed of α-tricalcium phosphate (α-TCP; cement matrix), calcium sulphate dihydrate granules (GCSD; aggregates in biomicroconcrete) and various polymers (chitosan, sodium alginate, methylcellulose) used for the improvement of material properties. The aim of this work was to study α-TCP-GCSD-polymer interactions and to compare the impact of organic additives on the physicochemical properties of biomicroconcretes. Methods: Scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), X-ray diffractometry (XRD) as well as universal testing machine (INSTRON), Gilmore apparatus and pH/ conduct-meter were used. Results: The chemical bonding between α-TCP matrix and CSD granules resulted in a compressive strength appropriate for low-load bearing applications (7–12 MPa) and clinically relevant setting times (8–33 min). Biomicroconcretes consisting of sodium alginate possessed the highest mechanical strength (12 ± 2 MPa). It has also been found that the dissolution-precipitation reactions of the α-TCP were retarded with the addition of chitosan and acetic acid. This effect was not observed in the case of methylcellulose and sodium alginate. Chemical stability and bioactivity of materials were demonstrated during in vitro studies in simulated body fluid. Conclusions: Materials containing calcium sulphate-based granules were surgically handy, possessed promising physicochemical properties and are supposed to ensure desired macroporosity as well as gradual resorption in vivo. It has been demonstrated that the presence of CSD granules and polymers influenced the physicochemical properties of composites.
Źródło:: Acta of Bioengineering and Biomechanics; 2020, 22, 1; 47-56
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Development of biodegradable packaging films and edible coatings for food products based on composite materials
Autorzy:: Kuprina, Elena Eduardovna
Yakkola, Anastasiya Nikolaevna
Manuylov, Andrey Nikolaevich
Kabysh, Olesya
Zhirkova, Marina Gavrilyevna
Zhernyakova, Anastasiya Valeryevna
Shmelkova, Mariya Alekseevna
Vitalyevich, Timofeev Sergey
Stepanov, Anatoliy
Powiązania:: https://bibliotekanauki.pl/articles/1034154.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: bactericidal properties
biodegradable food films and coatings
chitosan
edible films and coatings
environmental protection
physicochemical
sodium alginate
Opis:: Plastic is undoubtedly the most convenient type of packaging, but at the same time it is not ecologically friendly. The widespread use of packaging materials all over the world makes us think more and more about the harm of plastic to the environment and humans. It does not decompose in natural conditions and accumulates in huge quantities, because it is mostly used as a single-use packaging. Therefore, the development of environmentally friendly biodegradable edible films and coatings is relevant. Edible food packaging is an important step in food production and one of the innovative directions of food packaging development. This article presents materials on the development of the formulation and manufacturing technology of new composite materials based on sodium alginate and chitosan for the production of edible coatings and films. The results of the physical, chemical and bactericidal properties of these materials are presented.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2020, 25; 124-131
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "chitosan-alginate" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język