The aim of this study was to determine release rate and changes in polyphenols’ content, which were sorbed to
carboxymethyl cellulose gel and subsequently desorbed. An aqueous extract of blue marc vine variety Fratava was
used as a source of polyphenols. The gel was dried into a solid film and polyphenols were then desorbed again by
dissolving this film in saline (isotonic) solution. Further, the influence of different times of high temperature (180°C)
of drying gel on change in the amount of released polyphenols and also kinetics of their release in re-transfer of
the film on the gel and solution was studied. The process simulates the possible use of carboxymethyl cellulose/
polyphenols film sorbed on textile materials and its contact with the tissues and body fluids such as course of wound
healing.
In this study, we report evaluation of buff ering and self-sterilizing coating complex obtained by dolomite and zinc oxide particles incorporation into styrene-acrylic layer applied to cotton fabric. Surface properties of the coating were evaluated by SEM, EDS and 3D optical microscopy. Antimicrobial properties were determined using a mixture of G+ and G-bacteria (Escherichia coli, Staphylococcus epidermidis and Streptococcus mutans) that was in dynamic contact with canvases for 4-100 hours. Alkalizing -buff er capacity of the surface layer supplied to the system by dolomite was tested by the addition of acetic acid. All these properties were simultaneously tested on the same canvases that have been previously exposed to the so-called hot (105 °C) and wet aging (80 °C, 65% relative humidity). The aging was provided in the climatic test room for 144 hours and the properties of canvases before and after aging were compared and evaluated.
PMMA / PTFE optical fibers with increasing lateral emission were coated with titanium nanolayer using lowtemperature plasma. We investigated how this nanolayer affected the spectrum of emission when VIS LED and UVA LED light sources were used. Even though the FTIR analysis didn´t confirm the presence of TiO2 in the titanium nanolayer, the fibers exhibited significantly higher antibacterial properties compared to non-coated fibers. If we don´t assume that the titanium surface itself has antibacterial properties, the cause of this phenomenon is in the properties of the formed surface structure. Nevertheless, this treatment could extend the use of polymer optical fibers (POF) to new applications, such as illumination of infectious areas, for example, hospital corridors.
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