Search Results (7)

Industrial hemp (Cannabis sativa L.) was investigated as a sustainable biosorbent for removing Congo Red (CR) and Remazol Brilliant Blue R (RBBR) from wastewater. The unmodified hemp biosorbent exhibited moderate but practically relevant sorption capacities (4.47 mg/g for CR; 2.44 mg/g for RBBR), outperforming several agricultural waste materials. Kinetic studies revealed rapid uptake, with CR following pseudo-first-order kinetics (t₁/₂ < 15 min) and RBBR fitting the Elovich model, indicating heterogeneous surface interactions. Equilibrium data showed CR adsorption was best described by the Temkin isotherm (R² = 0.983), while RBBR followed the Langmuir model (R² = 0.998), reflecting their distinct binding mechanisms. Thermodynamic analysis confirmed spontaneous (ΔG° < 0), exothermic (ΔH° ≈ −2 kJ/mol), and entropy-driven processes for both dyes. Molecular docking elucidated the structural basis for performance differences: CR’s stronger binding (−7.5 kcal/mol) involved weak noncovalent interaction arising from partial overlap between the π-electron cloud of an aromatic ring and σ-bonds C-C or C-H (π-σ stacking) and hydrogen bonds with cellulose, whereas RBBR’s weaker affinity (−5.4 kcal/mol) relied on weak intermolecular interaction between a hydrogen atom (from a C-H bond) and the π-electron system of an aromatic ring (C-H∙∙∙π interactions). This work establishes industrial hemp as an eco-friendly alternative for dye removal, combining renewable sourcing with multi-mechanism adsorption capabilities suitable for small-scale water treatment applications. Full article

This paper deals with the sustainability of tourism in Stolovi Mountain. The purpose of the research was to show that it is possible to develop sustainable tourism in unestablished localities, intending to reduce differences in regional development in the Republic of Serbia, and then refine the tourist offerings of already established tourist localities in the vicinity. Various literature sources were used in the research. GIS software (QGIS 3.12) was used in order to create geographic and other special maps. Field observations were conducted, which were used to perform an in-depth analysis. In addition, two surveys were conducted with people from Kraljevo and those coming from other places in order to determine the identity and recognizability of Stolovi Mountain. The significance of this research is in pointing out that the connection of tourist sites can enrich the offer and attract new visitors, but also in supplementing scientific knowledge about Stolovi Mountain. The main results of the research show that green forms of tourism will ensure ecological sustainability. Kraljevo, a nearby city, is home to the workforce that will care for the localities, provide material contributions for the preservation of nature, guide jobs and sell souvenirs. Stolovi Mountain could quickly be included in various tourist tours and begin to demonstrate the first positive economic effects, followed by sociodemographic ones. The affirmation of mountainous, sparsely populated areas will lead to uniform regional development. Full article

The subject of this paper is to determine how the COVID-19 virus pandemic affected the situation in Serbian villages. The task of the paper is to show the positive and negative consequences that resulted from the pandemic. This would indicate that some of them may represent a new idea, a chance, or would work in favor of the sustainability of the villages of Serbia. In support of objectivity, research was carried out among the population that inhabits the rural areas of Serbia. It examined the extent to which internationally recognized phenomena and consequences of the COVID-19 virus pandemic were present in the study area and considered the nature of their impact on sustainability. The results of the semi-structured questionnaire were processed using descriptive statistics, t-test, and analysis of variance (ANOVA). Respondents contributed to the conception of possible solutions with their comments. The obtained differences in the answers resulted from different socio-demographic characteristics of the respondents, but also from the fact that the villages of Serbia differ in natural and social characteristics. Respondents’ responses are in favor of economic and sociodemographic sustainability, but they do not think in terms of environmental sustainability. The paper reveals several development opportunities, which complement each other and contribute to different methods for sustainability of rural villages in Serbia. Full article

This paper focuses on the underground military galleries and countermine system of the Petrovaradin Fortress near Novi Sad (Serbia). The Petrovaradin Fortress was presented within the working group Underground Built Heritage Reuse and Valorisation Strategies on the COST action Underground4value as a good example of tourist valorised underground cultural heritage in Serbia. The goal of the paper is to consider as widely as possible the options that could contribute to the sustainability of these galleries. Numerous field observations, complex research of the literature as well as other available sources, and interviews with visitors to the fortress were necessary for this goal to be achieved. The paper has special historical and practical significance. On the one hand, it represents a record in time concerning the condition of the Petrovaradin Fortress. The practical significance is reflected in the scientific contribution based on the critical analysis of the results obtained from authorities on the Fortress and visitors, as well as the ideas that the authors conceived or adapted from similar sites in the world, assessing that these ideas can be applied to the Petrovaradin Fortress. The results of the paper explain the aspects of ecological, economic, and social sustainability of the Petrovaradin Fortress, and indicate the need for it to be supported by various institutions. Full article

Herein, we report on the synthesis and pharmacological evaluation of ten novel fluorinated cinnamylpiperazines as potential monoamine oxidase B (MAO-B) ligands. The designed derivatives consist of either cinnamyl or 2-fluorocinnamyl moieties connected to 2-fluoropyridylpiperazines. The three-step synthesis starting from commercially available piperazine afforded the final products in overall yields between 9% and 29%. An in vitro competitive binding assay using l-[³H]Deprenyl as radioligand was developed and the MAO-B binding affinities of the synthesized derivatives were assessed. Docking studies revealed that the compounds 8–17 were stabilized in both MAO-B entrance and substrate cavities, thus resembling the binding pose of l-Deprenyl. Although our results revealed that the novel fluorinated cinnamylpiperazines 8–17 do not possess sufficient MAO-B binding affinity to be eligible as positron emission tomography (PET) agents, the herein developed binding assay and the insights gained within our docking studies will certainly pave the way for further development of MAO-B ligands. Full article

This paper represents a case study examining perceptions about tourism and reactions of the local community and bank decision makers to its development. The survey method was applied to establish the community’s attitude towards the impact of tourism in different spheres of life in the Kopaonik National Park (Serbia). The sample of 195 adult respondents covered inhabitants of 16 communities located within the wider area of the national park. In parallel, the potential support of banks for tourism development was examined on a sample of 21 banks. The survey results identified strong positive attitudes towards tourism and the presence of tourists among the local population. Compared to other categories, the community’s members employed in tourism had more favorable perceptions of tourism. The findings of the study also revealed that younger and better educated members of the population had more positive attitudes towards tourism impacts. Certain independent economic variables (the impact of tourism on job creation) and non-economic ones (the impact of tourism on activities of the community, reactions to the presence of tourists) significantly predicted the community´s support for tourism. An analysis of potential bank support showed that future community involvement in the tourism industry should be initiated by an adequate approach and credit policy instruments in the wider area of the Kopaonik National park. Full article

During the past decade, the valley of the West Morava in the central part of the Republic of Serbia experienced several natural hazards that have changed the life of the inhabitants. The aim of this paper is to show how people perceive natural hazards in the areas where they do not have catastrophic consequences for the entire population. The perceptions of natural hazards were examined according to similar studies and collected through surveys and interviews. The obtained stratified sample information was coded, and the results are expressed in the parameters of descriptive statistics, using T-test and ANOVA. The population is partially affected if inhabited locations are in the threatened part of the West Morava River valley and if their activities have direct consequences by natural disasters. They emphasize the importance of the political influences and mass media, but they show the need for additional information on prevention and protection. That is where they see geography as profession that sublimates all knowledge of natural disasters, unlike others that are more narrowly skilled. The results of the research are the starting point for further regional comparisons, which will complement the picture of the people’s attitude and resilience to natural hazards in Serbia and the Balkan Peninsula. Full article