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Beyond Microplastics : Analytical Boundaries, Real-World Barriers, and the Possibilities for Scalable Removal
No full textPlastic has transitioned rapidly from a revolutionary material to a global environmental concern, primarily due to mismanagement. Synthetic polymers have quickly gained widespread use due to their versatility, durability, and affordability. However, the properties making plastic indispensable contribute to its permanence in the environment, where it breaks down into microplastics—tiny particles that are typically classified in the size range from 0.1 µm to 5 mm. Theseparticles can now be found in all ecosystems, including the oceans, soil, atmosphere, and within living organisms, raising global concerns about their long-term environmental and health impacts. This review critically examines the current status and potential for identifying, analyzing, and mitigating microplastic pollution. In this paper, we particularly focus on the destructive and non-destructive analytical methods used for microplastic identification and characterization, examining their technical capabilities and limitations, the challenges in maintaining sample integrity, and the reliability of their quantification methods. In addition, the review addresses microplastic removal
strategies, from laboratory procedures to real-world applications, examining barriers to implementation and the limited availability of existing solutions. Finally, the review highlights the urgent need for standardized protocols, regulatory frameworks, and interdisciplinary collaboration to address the multifaceted nature of microplastic pollution
Plant growing in hydroponic system : case of study
No full textHydroponics is an innovative plant production system in which crops are cultivated in a nutrient, often with the support of inert substrates such as expanded clay, perlite, coconut fiber or rockwool. This method is typically implemented in controlled environments, including greenhouses or high tunnels, where key growth parameters (pH, electrical conductivity, nutrient concentration, temperature, light intensity, oxygen availability and air circulation) can be precisely regulated. Although hydroponic systems require higher initial investments, these costs are gradually offset through increased productivity and more efficient resource use. As a green innovation, hydroponics reduces dependence on climatic variability, limits exposure to pests and pathogens and supports year-round production with reduced water consumption and environmental impact. As part of this research, a case study was conducted to evaluate hydroponic cultivation under simplified, home-scale conditions. The goal was to identify the most critical control points in the system, including the sensitivity of pH and electrical conductivity adjustments, nutrient balance, temperature fluctuations and light availability. Several combinations of environmental and nutrient conditions were tested to determine which setups yield the most stable plant growth and highest biomass production. The results highlight the importance of continuous monitoring, particularly during early developmental stages, and demonstrate that even small deviations in nutrient concentration or environmental parameters can significantly affect plant performance. Findings from the case study provide practical insights into the limitations, risks and optimal management strategies for small-scale hydroponic systems, contributing to a broader understanding of hydroponics as a sustainable and accessible agricultural approach
Geochemical assessment of radionuclides, heavy metals and POPs in urban forest soils : hidden exposure pathways and health risks
No full textUrban forests contribute significantly to human well-being and climate resilience, yet they may also act as
reservoirs of contaminants such as radionuclides, heavy metals, and persistent organic pollutants (POPs). These
pollutants accumulate in soils and can pose chronic exposure risks to surrounding communities. This study
quantified radionuclides, heavy metals and POPs in soils of the protected Mount Avala forest near Belgrade,
Serbia, and evaluated the associated health risks. Natural radionuclide activities exceeded the global averages,
particularly for 40K, while 137Cs behavior appeared to be highly influenced by site-specific forest conditions and
post-depositional processes. Mean radiological excess lifetime cancer risk (ELCR) was ~60 % above the global
average. Strong correlations among 226Ra, 232Th, Co, and Ni indicate a predominantly lithogenic origin, whereas
the strong correlation between 137Cs and DDE suggests similar dynamics of these contaminants under forestspecific
conditions. The homogeneous distribution of 137Cs and other surface-deposited contaminants indicates
downward migration and redistribution over time, driven by post-depositional processes. Soils at AT6 showed
extreme enrichment in As and Pb, whereas AT8 exhibited elevated PCB 52 and DDT metabolites. While radiological
hazard indices remained within safety limits, certain metals and POPs exceeded non-carcinogenic and
carcinogenic intervention criteria at identified hotspots. Spatial heterogeneity in pollutant concentrations reflects
both geological controls and localized anthropogenic inputs. Integrating radionuclide- and contaminant-focused
monitoring, hotspot-targeted remediation, and risk-informed urban planning is essential to ensure that urban
green infrastructure remains safe, sustainable, and health-supportive
Примена динамичких вишеструких репрезентација у настави математике
No full textПредмет истраживања монографије Примена динамичких вишеструких репрезентација у настави математике припада области методика наставе математике. Садржај представљен у монографији може бити користан наставницима математике, који желе да унапреде свој рад имплементацијом наставних метода заснованих на примени савремене технологије, као и студентима, будућим наставницима математике.
Монографија обухвата четири дела.
Први део представља преглед релевантне литературе. У овом делу, дат је преглед истраживања о репрезентацијама у математици, са нагласком на вишеструким репрезентацијама. Посебан осврт је дат на вишеструке репрезентације у рачунарском окружењу, укључујући њихово креирање помоћу динамичких софтверских алата.
У другом делу, анализиране су могућности примене динамичких вишеструких репрезентација у изучавању функција. Описана су истраживања у којима је анализиран допринос примене динамичких вишеструких репрезентација код изучавања линеарне функције у основној школи, као и код учења на даљину, у раду са студентима високошколске установе.
Трећи део обухвата анализу могућности примене динамичких вишеструких репрезентација у изучавању геометријских садржаја. Описана су истраживања утицаја примене оваквих резултата на рад ученика код изучавања стереометрије у осмом разреду основне школе и у трећем разреду средње школе.
У четвртом делу, представљене су могућности примене динамичких вишеструких репрезентација у проблемској настави. Анализиран је методски приступ заснован на примени проблемске наставе и математичког моделовања, у окружењу динамичких вишеструких репрезентација, у завршном разреду средње школе
Strategies and mechanisms of plant-microbiome-pollinator coadaptation
No full textPlant-pollinator interactions showcase mutualistic coevolution, but the role of microorganisms in these relationships is often overlooked. Nectar-dwelling microorganisms, mainly yeasts and bacteria, significantly influence floral chemistry, pollinator behavior, and plant reproduction. These microorganisms alter nectar’s sugar content, amino acid profiles, pH, and scent emissions, shaping pollinator preferences. For example, the yeast Metschnikowia reukaufii produces fruity esters that attract bumble bees, while some bacteria lower pH, repelling honey bees. Pollinators spread these microorganisms between flowers, creating a feedback loop that shapes microbial communities and drives coevolution. Beyond nectar, microorganisms' impact on thermal regulation through metabolic heat, pollen health, and pollinator gut microbiomes. Specialized bacteria like Rosenbergiella nectarea and Acinetobacter spp. thrive in nectar’s high-sugar environment, while pollinator microorganisms, such as Lactobacillus kunkeei, protect honey bees from pathogens. Microbial diversity varies by region, with tropical flowers hosting richer communities than temperate ones. This review highlights how microorganisms act as key players in plant-pollinator networks, boosting pollinator nutrition, immunity, and foraging efficiency. It explores microbial spread, competition, and chemical influence, calling for studies that blend microbiology, ecology, and evolution. Understanding these interactions is vital for predicting how climate change and habitat loss threaten pollination, affecting agriculture and biodiversity
The Evolution of Internet Marketing and its Impact on Consumer Behavior in the Digital Age
No full textAz internet és a digitális technológiák rohamos fejlődése alapjaiban változtatta meg a vállalatok és a fogyasztók közötti kommunikációt, lehetővé téve a hatékonyabb, célzottabb és interaktívabb marketingstratégiák kialakítását. Az online marketing az elmúlt években számos új eszközt és módszert vezetett be, beleértve a keresőoptimalizálást (SEO), a tartalommarketinget, a közösségi médiakampányokat, az e-mail marketinget, valamint a fizetett hirdetéseket. A tanulmány célja, hogy átfogó képet adjon az online marketing fejlődéséről, kiemelve annak hatékonyságát és üzleti
szerepét, kitérve arra is, hogy milyen tényezők befolyásolják az internet marketing sikerességét, hogyan változott a fogyasztói magatartás az internetes hirdetések hatására. A tanulmányban elemzem a legújabb trendeket, a mesterséges intelligencia és a big data alkalmazását is az online marketingben.The rapid development of the internet and digital technologies has fundamentally transformed communication between businesses and consumers, enabling the creation of more efficient, targeted, and interactive marketing strategies. In recent years, internet marketing has introduced numerous new tools and methods, including search engine optimization (SEO), content marketing, social media campaigns, email marketing, and paid advertisements. The aim of this study is to provide a comprehensive overview of the evolution of internet marketing, highlighting its effectiveness and business significance. It also explores the factors influencing the success of internet marketing, how consumer behavior has changed due to online advertisements. The study further analyzes the latest trends, including the application of artificial intelligence and big data in internet marketing
Grain yield of buckwheat (Fagopyrum esculentum Moench) in different sow densities
No full textThe buckwheat is current plant due to its compliance with the demands of sustainable agriculture and the high standards of the modern population when it comes to food and dietary regimes. The aim of work was to explain influence of sowing densities to grain yield of common buckwheat and the existence of economic reasons for increasing the sowing density. So, 12 genotypes were examined, in 2 years and 3 sowing densities: 160, 120 and 80kg grains m-2. Results showed there was not significant difference between average grain yield reached by 120 and 160kg grains m-2. Such result indicates economic viability of buckwheat growing
Evaluation of Leadership Styles in Multinational Corporations Using the Fuzzy TOPSIS Method
No full textDue to globalization, companies are exposed to a culturally diversified workforce; therefore, great emphasis is placed on identifying the most effective leadership style that would be able to manage such a workforce. Although numerous studies have attempted to identify successful leadership styles in different cultural settings, none have focused on the perceptions of top managers who work in multinational corporations (MNCs) in culturally diversified surroundings. Thus, our research attempts to identify the most preferred leadership style and characteristics from the perspective of top managers in MNCs in the United Arab Emirates (UAE). The 13 leadership characteristics analyzed in this study were generated from the 21 characteristics found by Global Leadership and Organizational Behavior Effectiveness (GLOBE) research. The participants, top managers in MNCs, needed to evaluate leadership styles by considering leadership characteristics. To ensure the objectiveness of the study, we analyzed their answers by applying the Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method. The results indicated that the most preferred leadership characteristics were visionary, inspirational, collaborative team-oriented, and performance-oriented. Moreover, the transformational leadership style emerged as the most preferred leadership style. The study’s findings show that top managers believe that employees in MNCs in the UAE seek a leader with a vision whowill inspire, motivate, and help them fulfill their true potential
Opšte organsko povrtarstvo
No full textSva prava su zadržana. Nijedan deo ove publikacije ne može biti reprodukovan ili smešten u sistem za pretraživanje ili transmitovanje u bilo kom obliku bez pisane saglasnosti autora i izdavača
Socially engaged research as an instrument for strengthening local capacities for sustainable development
No full textSocially Engaged Research (SER) represents an approach that links academic work with societal needs and contributes to the sustainable development of local communities. The paper analyzes the role of SER in strengthening community capacities through the theoretical framework of the Quadruple Helix model and European sustainable development policies, relying on academic literature, EU strategic documents, and examples developed within the BETTER Life project (2022–2025). The results show that SER contributes to capacity-building through three key mechanisms: improving researchers’ competencies (Self-Assessment Tool), fostering collaboration between academia, industry, government, and civil society (Academic Bridge Map), and developing institutional frameworks through tools and practices for communication and participation (Communication Toolkit, educational board game, Institutional Action Plans). These instruments enable more inclusive knowledge transfer, interactive formats, and sustainable institutional changes. However, in transitional economies such as Serbia, challenges remain, including limited resources, insufficient collaboration with businesses, and lack of systematic policy support. The paper concludes that SER can become a key instrument for strengthening the resilience and capacities of local communities if it is institutionalized within universities and supported by appropriate public policies.Urednici zbornika : prof. dr Andrea Andrejević Panić, prof. dr Jelena Ješić, prof. dr Simonida Vukadinović i doc. dr Zoran Brlja