Природно-математички факултет: Recent submissions
Prikaz rezultata 181-200 od 269
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Hybrid materials based on rubber blend nanocomposites
(Wiley, 2019-08-15)In this applicative work, two types of silica filler were used to increase the adhesion strength between steel and elastomeric hybrid materials based on chlorosulfonated polyethylene rubber (CSM) and polychloroprene rubber ... -
Properties Of Elastomeric Composites Based On Three Network Precursors
(Wiley, 2019-04-10)The powder recycled rubber (PRR) can be used as a filler and a modifier for elastomeric materials and asphalt. Composites based on elastomers and recycled rubber powders are a serious challenge for the environment. The ... -
Biocomposites Based On Cellulose And Starch Modified Urea-Formaldehyde Resin: Hydrolytic, Thermal And Radiation Stability
(Wiley, 2019-04-10)Two biocomposites based on cellulose (UFC) and starch modified urea formaldehyde (UFS) resin (F/U ratio of 0.8) were synthesized using the same procedure. The hydrolitical, thermal, and radiation stability of biocomposites ... -
Ternary NR/BR/SBR rubber blend nanocomposites
(SAGE, 2018-02-24)The goal of this work was to synthesize and characterize ternary rubber blends based on polyisoprene (natural rubber (NR)), polybutadiene rubber (BR), and styrene–butadiene rubber (SBR) (NR/BR/SBR = 25/25/50) reinforced ... -
Thermal behavior of gamma-irradiated urea-formaldehyde composites based on the differently activated montmorillonite K10
(Springer, 2022-07-09)This work investigated the thermal characteristics of irradiated composite materials formulated on the urea–formaldehyde resin (UF) and differently activated montmorillonite (K10). UF resin with molar ratio F:U = 0.8 was ... -
Synthesis, characterization, hydrolytic, and thermal stability of urea–formaldehyde composites based on modified montmorillonite K10
(Springer, 2022-02-11)In this study, the thermal and hydrolytic properties of composite systems based on the urea–formaldehyde resin (UF) and eco-friendly montmorillonite (K10) as formaldehyde (FA) scavenger were examined. UF resin with molar ... -
Radiation stability and thermal behaviour of modified UF resin using biorenewable raw material-furfuryl alcohol
(Elsevier, 2019-06-15)The thermal stability of organic-inorganic nano-composites prepared by a two-stage polymerization of urea-formaldehyde resin (UF) with furfuryl alcohol (FA) and TiO2 before and after irradiation has been researched. The ... -
Gamma Irradiation: Properties, Behavior and Applications
(Nova Science Publisher, 2021-08-11)Gamma radiations are used for sterilization processes in medical devices, food industry as well as in nuclear power plants or aerospace. Gamma irradiation is a very convenient tool for the modification of polymeric materials. ... -
Crosslinking of Polymers: Rubber Vulcanization
(Springer Nature Switzerland AG, 2020-10-02)Crosslinking is a process whereby the polymer segments from different polymer chains are interconnected by covalent (and sometimes ionic) linkages. Crosslinks can be formed either during the polymer synthesis process, or ... -
Radionuclides and Metals in the Parks of the City of Belgrade, Serbia: Spatial Distribution and Health Risk Assessment.
In urban areas, forest patches and parks are usually the places where people spend most of their time outdoors. Due to the poor environmental protection policy and insufficient investment in industry and energy, Serbia is ... -
An Improved Modification of Accelerated Double Direction and Double Step-Size Optimization Schemes
(MDPI, 2022-01-13)We propose an improved variant of the accelerated gradient optimization models for solving unconstrained minimization problems. Merging the positive features of either double direction, as well as double step size accelerated ... -
Radon concentration in dwellings in the mining area of “Trepča” complex.
This paper presents the results of radon concentration in ground floor dwellings in the vicinity of the "Trepča" mine. Earlier studies on radon in the area of Kosovska Mitrovica have shown that there are dwellings with ... -
Ash radioactivity level and ambient dose equivalent rate in the vicinity of the TPP „Kosovo B“ Obilić.
In this paper, the specific activities of radionuclides in ash and ambient dose equivalent rate of gamma radiation in the air in the vicinity of the thermal power plant (TPP) "Kosovo B", Obilić were measured. Five samples ... -
Analiza visoke koncentracije radona u jednoj kući u rudarskom području kompleksa „Trepča“
Visoke koncentracije radona zabeležene su u jednoj kući u naselju Rudare u blizini rudarskog kompleksa “Trepča”. Ugljeni kanisteri izlagani po 48 sati u julu, novembru i decembru 2019 pokazali su vrednosti koncentracije ... -
Visoke koncentracije radona u porodičnoj kući u okolini Kosovske Mitrovice
U ovom radu su prikazani rezultati merenja koncentracije radona u jednoj porodičnoj kući u blizini Kosovske Mitrovice u periodu od 24.03.2020 – 31.05.2020. Interval merenja je obuhvatio period proglašenja vanredne situacije ... -
Procena zdravstvenog rizika izloženosti radonu iz vode u opštini Novo Brdo
Postojanje radona u vodi za pić e dovodi do unutrašnje izloženosti, direktno (kroz procese radioaktivnog raspadanja, ingestije i inhalacije) i indirektno (kada se kombinuju kao deo lanca ishrane). Merenje zastupljenosti ... -
Jačina ambijentalnog doznog eкvivalenta i кorelacija sa meteorološкim parametrima u gradu Valjevu i oкolini
Ради процене стања радиоактивности у животној средини, спроведена су мерења јачине амбијенталног дозног еквивалента у ваздуху на територији града Ваљева и околине. Истраживање је спроведено Гајгер-Милеровим бројачем ... -
High indoor radon concentration in residential houses. Ninth International Conference on radiation and applications in various fields of research, RAD9, Virtual Conference, Herceg Novi, Montenegro, July 14-18, 2021.
People are mainly exposed to radon in indoor environments. Exposure to radon and its decay products is the second leading cause of lung cancer, and there is a strong synergistic effect with smoking. The most significant ... -
Indoor Radon monitoring as a useful predictor of earthquake occurrences in the Balkan region
This study deals with continuous radon monitoring conducted to estimate the relationship between indoor radon measurements and potential occurrences of earthquake in the Balkan region. Radon monitoring was performed with ... -
Annual effective dose due to ingestion and inhalation of radon in water samples from public fountains in municipality of Kuršumlija, Serbia
In the present study, the water samples were taken from public fountains in rural area municipality of Kuršumlija, in southern part of Serbia. Sampling of water from public fountains began subsequently according to ...