Pericapsular fibrosis and inflammatory cell infiltration of microcapsules were significantly thined in Dexa-chitosan likened with alginate microcapsules. Dithizone and insulin were positive in Dexa-chitosan abridgements. Although fibrosis and macrophage infiltration was mentioned on the surface, some alginate microcapsules were stained with insulin Dexa coating on microcapsules significantly crushed the fibrotic reaction on the capsule surface after transplantation of xenogenic islets checking microcapsules without any harmful consequences on the function and survival of the islets.Electro-deposition synthesis of tube-like collagen-chitosan hydrogels and their biological performance.Electro-deposition is a smart, safe and efficient method for biomaterial manufacturing a functional protein with excellent biocompatibility and biosafety, is a promising candidate for tissue engineering and biomedical coverings there are few studys on electro-deposition of biomaterials expending collagen without electrically or magnetically active nanoparticles. In this study, electro-deposition was engaged to swiftly fabricate tube-like collagen-chitosan hydrogels in a mild environment.
Fourier transform infrared spectroscopy was hired to analyze the factors of the tube-like hydrogels. The result showed that the hydrogels contained both collagen and chitosan. The distribution and content of collagen in the hydrogels was further measured by hematoxylin-eosin staining and hydroxyproline titration. Methionine was distributed homogeneously and its content was connected to the initial collagen:chitosan ratio. The tension resistance of the composite gels and the thermal stability of collagen in the complexs were obviously heightened by the chitosan doping the tube-like hydrogels retained a good ability to promote cell proliferation of collagen. This method offers a convenient approach to the design and fabrication of collagen-based materials, which could effectively retain the bioactivity and biosafety of collagen and furnish a new way to enhance the stability of collagen and the tensile strength of collagen-grinded stuffs.A pH indicator film based on chitosan and butterfly pudding extract for monitoring fish freshness.
A pH indicator film was maked by commixing natural polymeric chitosan (CH) with natural dye from butterfly pudding extract (BP). The pics were determined by color modifications at different pH value, absorbance, thickness, moisture content, tumefying property, water contact angle, mechanical property, barrier property, and microstructure of pictures. Health Benefits of film was analyzed by Fourier transform infrared spectra. The application to monitor fish freshness was also analysed. The prepared film was sensitive to the alterations in pH value and readed distinct color modifications from pink purple to yellow, with pH value ordering from 1 to 14. The cinemas expressed visible color alterations from purple-blue to dark green during fish preservation. The total volatile basic nitrogen (TVB-N) content and pH value modifications of tilapia were closely refered to the visual color alterations in film.
The result indicated that the fabricated film was a highly pH-sensitive film for monitoring fish freshness.A platform for functionalization of cellulose, chitin/chitosan, alginate with polydopamine: A review on fundamentals and technical coatings.Nature caters conceptions and cloths with interesting functionalities to be applyed in innovative and sustainable materials. In this review, it is instanced how the combination of biological supermolecules, i.e. polydopamine and polyoses (cellulose, chitin/chitosan, alginate), enables to create functional fabrics with moderated places. The mussel-adhesive dimensions rely on the secretion of proteins having 3,4-dihydroxyphenylalanine amino acid with catechol groups.
Fundamental understanding on the biological functionality and interaction mechanisms of dopamine in the mussel foot plaque is posed in parallel with the development of synthetic analogues through extraction or chemical polymer synthesis modification of cellulose, chitin/chitosan or alginate and their nanoscale structures with polydopamine is discussed for various technical applications, admiting bio- and nanocomposites, celluloids, filtration or medical membranes, adhesives, aerogels, or hydrogels.Health Benefits
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