1. Evalvacija metod za določanje stopnje graftiranja malein anhidrida na polimere : magistrsko deloJernej Leitinger, 2026, magistrsko delo Ključne besede: evalvacija metod, graftiranje, PP, ABS, malein anhidrid, PP-g-MA, ABS-g-MA, titracija, FTIR, karakterizacija, magistrsko delo
Objavljeno v DiRROS: 07.07.2026; Ogledov: 104; Prenosov: 43
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3. Quantification and characterization of microplastics in seven urban wastewater treatment plantsErica Sparaventi, Rafael Nuez, María Pilar Yeste, Miguel Ángel Cauqui, Marta Sendra, 2026, izvirni znanstveni članek Povzetek: Microplastics (MPs) are routinely detected throughout wastewater treatment plants (WWTPs), yet current treatment trains were not designed specifically to remove them. This study quantified and characterized visually identified MPs in influent and effluent waters from seven urban WWTPs in Andalusia (southern Spain) during a six-month monitoring period (July–December 2020). The targeted analytical size range was 45–5000 µm, and a subset of particles was further characterized by FTIR. MPs were detected in all sampling campaigns. Concentrations ranged from 6 to 78 items/L in influent and from 12 to 65 items/L in effluent. Fibers were the dominant morphology, and the 100–500 µm size class was the most represented fraction. Among the subset analyzed by FTIR, PA, PP, PVC and LDPE were the most frequent polymer assignments, with PA predominating in the fiber-rich fraction. However, because influent and effluent 24 h time-composite samples were not hydraulic retention time (HRT)-paired and FTIR interpretation was based on a selected subset of particles, the dataset is best interpreted as describing spatiotemporal variability during the study period rather than robust process-specific removal efficiency. Overall, the results support WWTPs as an ongoing pathway for MP release to receiving environments.
Ključne besede: microplastics, wastewater treatment plants, six-month monitoring, FTIR, fibers, spatiotemporal variability
Objavljeno v DiRROS: 23.06.2026; Ogledov: 150; Prenosov: 106
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4. In vitro genotoxicity assessment of commercially available graphene quantum dots in human peripheral blood cells and salivary leukocytesTamara Ćetković Pećar, Irma Durmišević, Mirta Milić, Anja Haverić, Bojana Žegura, 2026, izvirni znanstveni članek Povzetek: Commercially available graphene quantum dots (GQDs) are promising nanomaterials for applications in research and preclinical diagnostics, drug delivery, and bioimaging. Their bioactivity is highly dependent on dose, route of exposure, duration, cell type, uptake mechanisms, tissue and cellular distribution, and physicochemical properties. This study aimed to evaluate genotoxic, cytotoxic, and cytostatic endpoints of blue- (B-GQDs) and greenemitting (G-GQDs) GQDs in human blood and salivary leukocytes. GQDs were tested at concentrations ranging from 2.5 to 100 μg/mL using distinct treatment periods. Fourier transform infrared spectroscopy (FTIR), trypan blue exclusion, comet, and cytokinesisblock micronucleus cytome (CBMN cyt) assays were performed. FTIR analysis revealed that G-GQDs, unlike B-GQDs, exhibit an absorption band typically associated with amine functional groups, which may contribute to their pronounced genotoxic effects. Peripheral blood mononuclear cells and salivary leukocytes showed higher sensitivity to G-GQDs compared to whole blood samples. Although no cytotoxic effects were observed, both GQDs induced significant DNA damage, with G-GQDs demonstrating greater genotoxic potential. These findings demonstrate that GQDs can induce DNA damage in the absence of detectable cytotoxic effects under the conditions tested, highlighting the importance of considering both physicochemical properties and cellular models in the safety assessment of nanomaterials.
Ključne besede: GQDs, FTIR, DNA damage, cell viability, micronuclei
Objavljeno v DiRROS: 23.06.2026; Ogledov: 132; Prenosov: 111
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5. Assessment of the suitability and accuracy of different methods to determine the degree of photodegradation of high- and low-density polyethylene, polypropylene, polyvinyl chloride, nylon and polystyrene microplasticsMaría Pilar Yeste, Saltanat Bergaliyeva, Miguel Ángel Cauqui, Miren P. Cajaraville, Marta Sendra, 2026, izvirni znanstveni članek Povzetek: In an accelerated aging experiment involving a wide range of cumulative UV-B radiant exposures (up to approximately 9.46 × 103 J cm−2), the degradation state of microplastics was assessed using SEM, FTIR, Raman spectroscopy, and DSC, and correlated with the cumulative UV-B dose. Sunlight-induced photooxidation is a significant weathering mechanism for microplastics. In this study, high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polyvinyl chloride (PVC), nylon, and polystyrene (PS) were exposed to UV-B radiation under controlled dry conditions at two irradiance levels (0.06 and 0.6 mW cm−2), covering cumulative UV-B radiant exposures of up to approximately 9.47 × 103 J cm−2. Degradation was evaluated using SEM, FTIR, Raman spectroscopy, and DSC, and was related to the cumulative UV-B dose (H). The extent and progression of degradation varied significantly among the polymers. Overall, FTIR provided the most sensitive assessment of photooxidative surface changes for HDPE, LDPE, PP, and PS, Raman spectroscopy was most diagnostic for PVC (particularly for dechlorination-related changes), and DSC-derived crystallinity was most informative for nylon. These dose-resolved datasets establish a reproducible reference framework (“degradation library”) to facilitate the comparative assessment of the relative photooxidative aging stage of microplastics under comparable surface UV-driven conditions. Outdoor “sunlight-equivalent” times are reported solely as order-of-magnitude contextualization due to environmental variability.
Ključne besede: microplastic, UV irradiation, degradation, SEM, FTIR, Raman, DSC
Objavljeno v DiRROS: 11.06.2026; Ogledov: 158; Prenosov: 150
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6. Green inhibition of microbiologically influenced corrosion on 316L stainless steel by Artemisia annua extractGloria Zlatić Jelić, Ivana Martinović, Zora Pilić, Janez Kovač, Marcela Romić, 2026, izvirni znanstveni članek Povzetek: 316L stainless steel is widely used in marine and biomedical applications. However, its protective Cr-rich passive film can be destabilized by microbiologically influenced corrosion (MIC). Here, a multidisciplinary approach combining electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP), optical profilometry, ATR-FTIR, X-ray photoelectron spectroscopy (XPS), and ICP-OES was used to investigate corrosion behavior and passive film chemistry of 316L stainless steel (SS) exposed to Pseudomonas aeruginosa in artificial seawater, and to evaluate the inhibitory effect of an aqueous Artemisia annua extract (AAE). Exposure to P. aeruginosa, resulted in a marked decrease in film resistance, increased corrosion current density, enhanced Fe dissolution, and pronounced surface pitting. Although biotic exposure increased the apparent oxide thickness, XPS analysis revealed the formation of a chemically heterogeneous and less protective surface layer. In contrast, the addition of AAE significantly mitigated these effects by stabilizing a Cr-enriched passive film, increasing charge-transfer resistance, reducing jcor, and suppressing localized attack. ATR-FTIR confirmed adsorption of phenolic acids from AAE, while XPS depth profiling revealed stabilization and thickening of the passive layer. The inhibition efficiency of AAE, evaluated by PP, EIS, and ICP-OES, ranged from 65% to 83%, demonstrating consistent protective behavior across all methods. These results indicate that A. annua extract acts as a plant-derived corrosion inhibitor that preserves the functional stability of the Cr-rich passive film under MIC conditions, offering a promising strategy for corrosion mitigation in marine environments.
Ključne besede: biofilm formation, electrochemical impendance spectroscopy, seawater corrosion, ATR-FTIR spectroscopy, X‑ray photoelectron spectroscopy, passive film stability
Objavljeno v DiRROS: 20.03.2026; Ogledov: 379; Prenosov: 277
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7. Določanje stopnje kristaliničnosti in vpliva na lastnosti filamenta PA6 : diplomsko deloDraginja Talić, 2024, diplomsko delo Ključne besede: poliamid 6, filamenti, kristaliničnost, stopnja kristaliničnosti, sposobnost obarvanja, natezne lastnosti, diferenčna dinamična kalorimetrija (DSC), infrardeča spektroskopija s Fourierjevo transformacijo (FTIR), diplomsko delo
Objavljeno v DiRROS: 18.07.2025; Ogledov: 1103; Prenosov: 368
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8. Mehanske lastnosti lepljenih spojev : vpliv izpostavljenosti in naravnega staranjaMartin Capuder, Boris Azinović, Andreja Pondelak, Tomaž Pazlar, Jaka Gašper Pečnik, Luka Naumovski, 2025, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: bukev, lepljen spoj, FTIR, naravna izpostavitev, mehanske lastnosti lesa
Objavljeno v DiRROS: 05.06.2025; Ogledov: 956; Prenosov: 399
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10. Karakterizacija CAN-ov na osnovi polipropilena graftiranega z glicidil metakrilatom : diplomsko deloKaja Seitl, 2024, diplomsko delo Ključne besede: CAN-i, karakterizacija, zamreževalo, katalizator, TGA, DSC, DMA, FTIR, diplomsko delo
Objavljeno v DiRROS: 07.04.2025; Ogledov: 969; Prenosov: 314
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