Supplementary material for the article: Milenković, I.; Radotić, K.; Matović, B.; Prekajski, M.; Živković, L.; Jakovljević, D.; Gojgić-Cvijović, G.; Beškoski, V. Improving Stability of Cerium Oxide Nanoparticles by Microbial Polysaccharides Coating. Journal of the Serbian Chemical Society 2018, 83 (6), 745–757. https://doi.org/10.2298/JSC171205031M

Supplementary material for: [https://doi.org/10.2298/JSC171205031M]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2087

Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating

Cerium oxide (CeO2) nanoparticles (CONPs) are interesting biomaterials with various applications in biomedicine, cosmetics and the pharmaceutical industry, but with limited practical application because of their low stability in aqueous media. The aim of this study was to obtain CONPs with increased stability by coating the particles. Microbial exopolysaccharides (levan, pullulan) and glucose were used to prepare CONPs under different synthesis conditions. Coating was attempted by adding the carbohydrates during (direct coating) or after (subsequent coating) the synthesis of CONPs. The obtained nanoparticles were characterized by X-Ray diffraction analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The suspension stability of the uncoated and coated CONPs in aqueous media was evaluated by measuring the hydrodynamic size, zeta potential and turbidity. The FT-IR spectra revealed the differences between coated CONPs and showed the success of subsequent coating with carbohydrates. Coating with carbohydrates improved the stability the CONP suspension by decreasing the size of aggregated particles. The suspensions of levan- and glucose-coated CONPs had the best stability. In this study, CONPs were prepared using non-toxic materials, which were completely environmentally friendly. The obtained results open new horizons for CONP synthesis, improving their biological applications.Supplementary material: [http://cherry.chem.bg.ac.rs/handle/123456789/3207

Supplementary material for the article: Milenković, I.; Radotić, K.; Matović, B.; Prekajski, M.; Živković, L.; Jakovljević, D.; Gojgić-Cvijović, G.; Beškoski, V. Improving Stability of Cerium Oxide Nanoparticles by Microbial Polysaccharides Coating. Journal of the Serbian Chemical Society 2018, 83 (6), 745–757. https://doi.org/10.2298/JSC171205031M

Supplementary material for: [https://doi.org/10.2298/JSC171205031M]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2087

Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia

Background: Arsenic is constantly present in drinking water supply systems of Zrenjanin municipality across decades. It presents a great public health problem in Serbia, but its relationship with acute coronary syndrome (ACS) has not been studied previously. Objectives: The aims of this study were to assess the incidence of ACS in two areas from Zrenjanin municipality consuming different levels of arsenic in drinking water, and to explore the association between arsenic exposure and the probability of fatal outcome of ACS. Methods: The research was a registry-based ecological study of two populations consuming water with different arsenic levels, based on current guidelines (10 mu g/L). Median arsenic in the area above national standard was 80 mu g/L; median arsenic in the other area was 1 mu g/L. Newly diagnosed cases of ACS were obtained from the National Registry for Acute Coronary Syndrome from 2006 to 2010. Results: The two populations were comparable by age, gender, and prevalence of risk factors for ACS. Standardized incidence rates (SIR) of ACS were higher for people consuming arsenic above standard (average five-year SIR was 237.00 per 100.000: 95% CI=214.93-260.74), in comparison to people consuming arsenic within limits (average SIR=124.40 per 100.000; 95% CI=96.00-158.56). Exposure to arsenic above limits was insignificantly associated with fatal outcome of ACS for the whole population, men and women. Conclusions: Consumption of arsenic above national standards was associated with higher risk for the occurrence of acute coronary syndrome and with insignificantly higher probability of fatal outcome of ACS in Zrenjanin municipality. (C) 2012 Elsevier Inc. All rights reserved