Репозиторий Университета

© 2021 Elsevier Ltd The functionalization of the bacterial cellulose (BC) surface with a chitosan biopolymer to expand the areas of possible applications of the modified BC is an important scientific task. The creation of such composites in the carbonic acid solutions that were performed in this work has several advantages in terms of being biocompatible and eco-friendly. Quantitative analysis of chitosan content in the composite was conducted by tritium-labeled chitosan radioactivity detection method and this showed three times increased chitosan loading. Different physicochemical methods showed successful incorporation of chitosan into the BC matrix and interaction with it through hydrogen bonds. Microscopy results showed that the chitosan coating with a thickness of around 10 nm was formed in the bulk of BC, covering each microfibril. It was found that the inner specific surface area increased 1.5 times on deposition of chitosan from the solutions in carbonic acid.

© 2020 Wiley Periodicals LLC A modern immunofluorescence analysis based on spectrally encoded microspheres has found numerous and constantly growing applications in disease diagnosis, environmental supervision, and fundamental science. Here we present an overview of microsphere-based methods of multiplex immunofluorescence analysis and consider such important parameters of beads, that are crucial in most microsphere-based immunoassays, as size distribution, fluorescence stability, magnetic properties, and particle material. The preparation methods of the microspheres with tunable diameter, the introduction of various types of fluorochromes, and magnetic particles into the microspheres are discussed in details. This review also addresses the advantages and disadvantages of different approaches to implement technically bead-based immunofluorescence analysis.