1. Characterization of sustainable biocompatible materials based on chitosan : cellulose composites containing sporopollenin exine capsulesDorota Korte, Mohanachandran Nair Sindhu Swapna, Hanna Budasheva, Patricia Cazón, Manisha Chhikara, Tina Škorjanc, Carmen Tripon, Alexandra Farcas, Egon Pavlica, Chieu D. Tran, Mladen Franko, 2024, izvirni znanstveni članek Ključne besede: material characterization, biocompatible materials, chitosan, sporopollenin exine capsules, beam deflection spectrometry Objavljeno v RUNG: 29.10.2024; Ogledov: 349; Prenosov: 0 Gradivo ima več datotek! Več... |
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4. Porosity engineering in cellulose-chitosan composites via sporopollenin incorporation for wound healing applicationsMohanachandran Nair Sindhu Swapna, Petra Makorič, Dorota Korte, Chieu D. Tran, Mladen Franko, 2023, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: cellulose, chitosan, composite, wound healing, photothermal beam deflection, porosity Objavljeno v RUNG: 16.10.2023; Ogledov: 1632; Prenosov: 0 Gradivo ima več datotek! Več... |
5. Nanoscopic roughness characterization of chitosan with buried graphene oxide for fuel cell applicationAhmed Kreta, Egon Pavlica, Mojca Božič, Gvido Bratina, 2023, objavljeni znanstveni prispevek na konferenci Ključne besede: AFM, chitosan, graphene oxide, fuel cells, membrane, roughness Objavljeno v RUNG: 01.03.2023; Ogledov: 2410; Prenosov: 7 Celotno besedilo (2,74 MB) Gradivo ima več datotek! Več... |
6. Characterization of smart and biocompatible materials based on chitosan:cellulose composites containing sporopollenin exine capsulesHanna Budasheva, Patricia Cazon Diaz, Dorota Korte, Mladen Franko, 2022, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: chitosan:cellulose composites, biocompatible materials, beam deflection spectrometry, porosity determination, structural characterisation, thermal properties Objavljeno v RUNG: 30.06.2022; Ogledov: 2248; Prenosov: 67 Celotno besedilo (84,71 KB) |
7. Chitosan and their derivatives: Antibiofilm drugs against pathogenic bacteriaFazlurrahman Khan, Dong Pham, Sandra Oloketuyi, Panchanathan Manivasagan, Junghwan Oh, Young-Mog Kim, 2020, pregledni znanstveni članek Opis: Biofilm formed by several pathogenic bacteria results in the development of resistance against antimicrobial compounds. The polymeric materials present in the biofilm architecture hinder the entry of antimicrobial compounds through the surface of bacterial cells which are embedded as well as enclosed beneath the biofilm matrix. Recent and past studies explored the alternative approaches to inhibit the formation of biofilm by different agents isolated from plants, animals, and microbes. Among these agents, chitosan and its derivatives have got more attention due to their properties such as biodegradability, biocompatibility, non-allergenic and non-toxicity. Recent researches have focused on employing chitosan and its derivatives as effective agents to inhibit biofilm formation and attenuate virulence properties by various pathogenic bacteria. Such antibiofilm activity of chitosan and its derivatives can be further enhanced by conjugation with a wide range of bioactive compounds. The present review describes the antibiofilm properties of chitosan and its derivatives against the pathogenic bacteria. This review also summarizes the mechanisms of biofilm inhibition exhibited by these molecules. The knowledge of the antibiofilm activities of chitosan and its derivatives as well as their underlying mechanisms provides essential insights for widening their applications in the future. Ključne besede: Antibiofilm, Biofilm inhibition, Chitosan, Chitosan derivatives, Pathogenic bacteria Objavljeno v RUNG: 14.01.2021; Ogledov: 3234; Prenosov: 0 Gradivo ima več datotek! Več... |
8. Polysaccharide-based films and coatings for food packaging: A review.Patricia Cazón, Gonzalo Velazquez, Jose A. Ramirez, Manuel Vazquez, 2017, pregledni znanstveni članek Opis: The accumulation of synthetic plastics, mainly from food packaging, is causing a serious environmental problem. It is driving research efforts to the development of biodegradable films and coatings. The biopolymers used as raw material to prepare biodegradable films should be renewable, abundant and low-cost. In some cases, they can be obtained from wastes. This review summarizes the advances in polysaccharide-based films and coatings for food packaging. Among the materials studied to develop biodegradable packaging films and coatings are polysaccharides such as cellulose, chitosan, starch, pectin and alginate. These polysaccharides are able to form films and coatings with good barrier properties against the transport of gases such as oxygen and carbon dioxide. On the other hand, tensile strength and percentage of elongation are important mechanical properties. Desirable values of them are required to maintain the integrity of the packed food. The tensile strength values showed by polysaccharide-based films vary from each other, but some of them exhibit similar values to those observed in synthetic polymers values. For example, tensile strength values of films based on high amylose starch or chitosan are comparable to those values found in high-density polyethylene films. The values of percentage of elongation are the main concern, which are far from the desirable values found for synthetic polymers. Researchers are studying combinations of polysaccharides with other materials to improve the barrier and mechanical properties in order to obtain biopolymers that could replace synthetic polymers. Functional polymers with antimicrobial properties, as that the case of chitosan, are also being studied. Ključne besede: Cellulose, Chitosan, Starch, Water vapour permeability, Tensile strength, Percentage of elongation at break Objavljeno v RUNG: 14.12.2020; Ogledov: 3287; Prenosov: 0 Gradivo ima več datotek! Več... |
9. Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol: Evaluation of mechanical and barrier propertiesPatricia Cazón, Gonzalo Velazquez, Manuel Vazquez, 2019, izvirni znanstveni članek Opis: Bacterial cellulose (BC) produced by Komagataeibacter xylinus is a biomaterial with a unique three-dimensional structure. To improve the mechanical properties and reinforce the BC films, they were immersed in polyvinyl alcohol (0–4%) and chitosan (0–1%) baths. Moisture content, mechanical properties and water vapour perme- ability were measured to assess the effect of polyvinyl alcohol and chitosan. The morphology, optical, structural and thermal properties were evaluated by scanning electron microscopy, spectral analysis, thermogravimetry and differential scanning calorimetry. Results showed that moisture content was significantly affected by the chitosan presence. Tensile strength values in the 20.76–41.65 MPa range were similar to those of synthetic polymer films. Percentage of elongation ranged from 2.28 to 21.82% and Young's modulus ranged from 1043.88 to 2247.82 MPa. The water vapour permeability (1.47×10−11–3.40×10−11 g/m s Pa) decreased with the addition of polyvinyl alcohol. The developed films own UV light barrier properties and optimal visual appearance. Ključne besede: Films, Bacterial cellulose, Water vapor permeability, Chitosan, Polyvinyl alcohol, UV protection Objavljeno v RUNG: 14.12.2020; Ogledov: 3098; Prenosov: 0 Gradivo ima več datotek! Več... |
10. Mechanical and barrier properties of chitosan combined with other components as food packaging filmPatricia Cazón, Manuel Vazquez, 2019, pregledni znanstveni članek Opis: Chitosan is an alternative to synthetic polymers for food packaging. The mechanical and barrier properties of pure chitosan films are promising. Chitosan properties can be modified by combining chitosan with other components such as plasticizers, other polysaccharides, proteins and lipids. Here we review mechanical and barrier properties of composite films based on chitosan. The major points are: (1) compared with synthetic plastic films, an important limitation of chitosan-based films is their mechanical properties, especially their capacity to elongation; (2) chitosan is a polymer that allows an easy combination with other polysaccharides, plasticizers, proteins and lipids; (3) this allows to develop mixed components and modify the film properties according to the nature of the food to be packaged. Ključne besede: Chitosan, Film, Mechanical properties, Barrier properties, Food packaging Objavljeno v RUNG: 09.12.2020; Ogledov: 3458; Prenosov: 0 Gradivo ima več datotek! Več... |