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SYNTHESIS OF SILVER NANOPARTICLES IN A CHITOSAN SOLUTION

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Modrzejewska Z., Zarzycki R., Sielski J.
Progress on Chemistry and Application of Chitin and its Derivatives
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2010
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vol. 15
63 - 72
EN
In the present study silver nanoparticles were obtained using the ability of chitosan to form chelate compounds with metal ions and taking advantage of its reducing properties. The reduction process was conducted at the temperature 60°C or applying γ radiation from 60Co cobalt source. A preliminary characteristic which allows us to realize the size of formed silver nanoparticles was made on the basis of the measurements of UV absorption and dynamic light dispersion.
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ADSORPTION OF SILVER IONS ON CHITOSAN HYDROGEL BEADS

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Sujka W., Rogacki G., Modrzejewska Z., Zarzycki R.
Progress on Chemistry and Application of Chitin and its Derivatives
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2023
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vol. 28
166-187
EN
We investigated the adsorption of silver(I) from silver nitrate (AgNO3) and silver sulphate (Ag2SO4). We compared the adsorption ability of chitosan in the form of hydrogel beads with that of chitosan acetate – an initial solution from which the beads were derived. We developed a model of adsorption kinetics, assuming the simultaneous occurrence of the diffusion process and the chemical reaction. We confirmed and described the chemical nature of adsorption based on the Fourier-transform infrared and X-ray photoelectron spectra.
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CYTOTOXICITY OF CHITOSAN BASED THERMO-SENSITIVE HYDROGELS INTENDED FOR NERVOUS TISSUE ENGINEERING

88%
Nawrotek K., Modrzejewska Z., Paluch D., Zarzycki R., Rusak A.
Progress on Chemistry and Application of Chitin and its Derivatives
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2015
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vol. 20
222-235
EN
The damage to the central nervous system is one of the most difficult cases of trauma to treat. Over the last few years, increasing attention has been focused on the development of strategies based on biomaterials for regeneration and repair of the spinal cord injury. In particular, materials in the form of hydrogels based on chitosan are being actively investigated due to their intrinsic properties that are favorable in spinal cord tissue regeneration. The purpose of this study was to develop a thermo-gelling chitosan solution that will be prepared with the use of acids that naturally occur in the human nervous tissue. For this purpose, two types of chitosan gels were prepared based on chitosan glutamate and chitosan lactate. In order to reduce toxic action of the system obtained gels were conditioned in distilled water with pH 5.00. The changes in the structures of systems obtained were determined with the use of FTIR method. Biocompatibility was primarily evaluated through cytotoxicity testing by MTT assay with respect to mouse fibroblast cells.
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