20.500.12556/DiRROS-19708 Cell proliferation on polyethylene terephthalate treated in plasma created in ▫$SO_2/O_2$▫ mixtures Samples of polymer polyethylene terephthalate were exposed to a weakly ionized gaseous plasma to modify the polymer surface properties for better cell cultivation. The gases used for treatment were sulfur dioxide and oxygen of various partial pressures. Plasma was created by an electrodeless radio frequency discharge at a total pressure of 60 Pa. X-ray photoelectron spectroscopy showed weak functionalization of the samples’ surfaces with the sulfur, with a concentration around 2.5 at %, whereas the oxygen concentration remained at the level of untreated samples, except when the gas mixture with oxygen concentration above 90% was used. Atomic force microscopy revealed highly altered morphology of plasma-treated samples; however, at high oxygen partial pressures this morphology vanished. The samples were then incubated with human umbilical vein endothelial cells. Biological tests to determine endothelialization and possible toxicity of the plasma-treated polyethylene terephthalate samples were performed. Cell metabolic activity (MTT) and in vitro toxic effects of unknown compounds (TOX) were assayed to determine the biocompatibility of the treated substrates. The biocompatibility demonstrated a well-pronounced maximum versus gas composition which correlated well with development of the surface morphology. true false true Angleški jezik Ni določen Neznano 2024-07-24 03:46:28 2024-07-25 10:09:33 2024-09-10 13:58:45 0000-00-00 00:00:00 2017 0 0 Nasl z nasl. zasl.; Opis vira z dne 27. 2. 2017; str. 82-1-82-16 no. 3 Vol. 9 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2017-02-25 533 2073-4360 10.3390/polym9030082 30276647 RAZ_Recek_Nina_2017.pdf RAZ_Recek_Nina_2017.pdf 1 826DB3A8781C5D1E7D985A5CFBF9FDF3 223c737af76d495e87ef70d44a8f50b4e0ce66567f4294fe5b0143d2c2b219e4 987550c5-4a4c-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27459 https://doi.org/10.3390/polym9030082 0 8aee8a66-4a4c-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27458 Nacionalni inštitut za biologijo 0 0 0