31. Tuning the rheological properties of paraffin-wax ceramic feedstocks for deposition with thermoplastic 3D printingIpeknaz Özden, Milan Vukšić, Matevž Dular, Aljaž Iveković, Andraž Kocjan, 2024, original scientific article Abstract: Droplet deposition with material-jetting methods such as thermoplastic 3D printing (T3DP) depends greatly on the rheological properties of the feedstocks. This study investigated the effect of particle interactions and the degree of weak flocculation on the shear thinning behaviour, the yield stress and the storage/loss moduli of paraffin-wax-based feedstocks containing 40 vol% of zirconia (3Y-TZP) micron-sized powder. Steric stabilization of the feedstocks was provided by varying the ratios of the surfactants with different chain lengths, i.e., stearic acid (2.4 nm) and Solsperse 3000® (10 nm), which in turn affected the dynamics of the droplet formation and the quality of the layers when jetting non-Newtonian, thermoplastic ceramic feedstocks. The results of the study extend the guidelines for the processing of printable feedstocks used in T3DP additive manufacturing.
Keywords: additive manufacturing, material jetting, colloidal processing
Published in DiRROS: 19.12.2025; Views: 29; Downloads: 18
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32. ▫$TiO_2$▫-based heterostructure containing ▫$g-C_3N_4$▫ for an effective photocatalytic treatment of a textile dyeMartina Kocijan, Milan Vukšić, Mario Kurtjak, Lidija Ćurković, Damjan Vengust, Matejka Podlogar, 2022, original scientific article Abstract: Water pollution has become a serious environmental issue. The textile industries using textile dyes are considered to be one of the most polluting of all industrial sectors. The application of solar-light semiconductor catalysts in wastewater treatment, among which TiO2 can be considered a prospective candidate, is limited by rapid recombination of photogenerated charge carriers. To address these limitations, TiO2 was tailored with graphitic carbon nitride (g-C3N4) to develop a heterostructure of g-C3N4@TiO2. Herein, a simple hydrothermal synthesis of TiO2@g-C3N4 is presented, using titanium isopropoxide (TTIP) and urea as precursors. The morphological and optical properties and the structure of g-C3N4, TiO2, and the prepared heterostructure TiO2@g-C3N4 (with different wt.% up to 32%), were analyzed by various laboratory methods. The photocatalytic activity was studied through the degradation of methylene blue (MB) aqueous solution under UV-A and simulated solar irradiation. The results showed that the amount of g-C3N4 and the irradiation source are the most important influences on the efficiency of MB removal by g-C3N4@TiO2. Photocatalytic degradation of MB was also examined in realistic conditions, such as natural sunlight and different aqueous environments. The synthesized g-C3N4@TiO2 nanocomposite showed superior photocatalytic properties in comparison with pure TiO2 and g-C3N4, and is thus a promising new photocatalyst for real-life implementation. The degradation mechanism was investigated using scavengers for electrons, photogenerated holes, and hydroxyl radicals to find the responsible species for MB degradation.
Keywords: UV-A, simulated solar light, natural sunlight, water matrices, scavengers
Published in DiRROS: 19.12.2025; Views: 27; Downloads: 20
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34. Mestni odprti prostori kot rekreacijska območja in zatočišča v primeru izrednih razmer : spoznanja po potresu v MalatyiSahar Pouya Sönmez, Gamze Öner, Sima Pouya, 2025, original scientific article Abstract: Med potresom v Turčiji leta 2023 so bili javni odprti prostori pomembna zbirna območja, po potresu pa se niso mogli več ustrezno uporabljati za rekreacijo in niti niso mogli več zadovoljevati drugih vsakdanjih potreb prebivalcev. Avtorice so v članku proučile učinkovitost šestih javnih odprtih prostorov v Malatyi in njihove spremembe po potresu ter predlagale strategije za vključitev trajnostnih načel v načrte potresne varnosti. Pri tem so uporabile metodo naknadne ocene uporabe prostora, ki je vključevala terenske analize, polstrukturirane intervjuje s šestdesetimi občinskimi strokovnjaki in anketo, v kateri je sodelovalo 240 uporabnikov proučevanih prostorov. Izsledki so pokazali, da so med potresom za javne odprte prostore nastale težave, kot so neustrezna infrastruktura, pomanjkanje prostora za postavljanje šotorov in težave, povezane z varnostjo in vzdrževanjem površin. Po potresu se večina teh ne uporablja več za rekreacijo. Nekateri so se spremenili v trgovska območja, drugi so dobili nove uporabnike, pogosto so se pojavile še druge spremembe v rabi prostora. Glavna ugotovitev raziskave je, da potresna odpornost javnih odprtih prostorov ni odvisna samo od njihove velikosti, dostopnosti in lokacije, ampak tudi od možnosti izvajanja hitrih vzdrževalnih posegov na teh površinah in večnamenskosti, ki zagotavljata, da se na teh prostorih ohrani življenje in da delujejo tudi po naravni nesreči. Med ključnimi načrtovalskimi priporočili so vključitev ukrepov za okrepitev pripravljenosti na nesreče v mestno načrtovanje in omogočanje učinkovite obnove po nesrečah.
Keywords: avtobusna postaja, večkriterijska analiza, izbor lokacije, MOOSRA, ARAS, VIKOR
Published in DiRROS: 19.12.2025; Views: 21; Downloads: 22
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35. Celostna analiza družbene trajnosti v Severnokazahstanski oblasti v KazahstanuGaukhar Aidarkhanova, Gaukhar Aubakirova, Laura Kenespayeva, Damira Tazhiyeva, Gaukhar Kairanbayeva, Farabi Yermekov, 2025, original scientific article Abstract: Zaradi čedalje večjih prostorskih razlik se v Kazahstanu veča potreba po sistematični analizi družbene trajnosti na subregionalni ravni. V članku je na podlagi 15 kazalnikov, razvrščenih v pet ključnih komponent (demografija, zdravstvo, izobraževanje, kakovost življenja in družbena vključenost), oblikovan in preizkušen sestavljeni indeks družbene trajnosti. Uporabljena metodologija vključuje normalizacijo podatkov, združevanje kazalnikov in prostorsko analizo z orodji GIS. Analiza je pokazala stabilno, a izrazito nesimetrično prostorsko zgradbo družbene trajnosti: za regionalno središče Petropavl so bile ugotovljene razmeroma visoke vrednosti večine komponent, za večino podeželskih območij pa so značilni odseljevanje, socialna ranljivost ter slab dostop do osnovnih storitev in infrastrukture. Analiza občutljivosti je potrdila uporabnost predstavljenega modela v primerih nepopolnega statističnega poročanja. Na podlagi izsledkov so avtorji oblikovali tipologijo okrožij in predlagali usmeritve za prostorsko usmerjeno socialno politiko. Predlagana metodologija se lahko uporablja za spremljanje razlik med regijami, oceno socialnih tveganj in utemeljevanje trajnostnih razvojnih prednostnih nalog v regijah s spreminjajočo se demografsko strukturo.
Keywords: družbena trajnost, demografska struktura, prostorske razlike, Severnokazahstanska oblast, GIS, trajnostni indeks, cilji trajnostnega razvoja
Published in DiRROS: 19.12.2025; Views: 28; Downloads: 16
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39. Endocrine adaptations to prolonged fasting women who had developed gestational diabetes : from physiology, clinical uncertainties, translational challenges to healthspan implicationsRok Herman, Jure Tršan, Luka Lipar, Mojca Jensterle Sever, Andrej Janež, 2025, review article Abstract: Objectives: Intermittent fasting regimens that include periods of prolonged fasting may mimic certain well-documented benefits of calorie restriction. In this narrative review, we synthesize preclinical and human data on endocrine adaptations during prolonged fasting protocols. Methods: We conducted a structured search of relevant databases, followed by data extraction and synthesis, with a focus on endocrine adaptations during prolonged fasting and their potential implications for healthspan. Results: Across various endocrine axes, prolonged fasting appears to induce a reproducible pattern marked by diminished anabolic signaling and transient activation of potential stress resilience pathways. However, the evidence is limited by small sample sizes, short follow-up durations, methodological heterogeneity, and dependence on surrogate endpoints. Endocrine outcomes are frequently secondary and reported inconsistently. Potential risks include transient hypogonadism, relative hypothyroidism, hypercortisolemia, orthostatic intolerance, electrolyte imbalances, catabolic loss of lean mass, and refeeding challenges. Conclusions: Overall, prolonged fasting activates conserved endocrine mechanisms that may confer plausible cardiometabolic benefits; however, their translation to clinical practice remains speculative. We highlight key knowledge gaps and propose directions for future research in this emerging field.
Keywords: prolonged fasting, endocrine adaptations, metabolic switch
Published in DiRROS: 19.12.2025; Views: 20; Downloads: 16
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40. Isoeugenol hydrodeoxygenation over sustainable biochar-supported cobalt catalysts : synergistic Co⁰/Co²⁺ sites and mechanistic insightsLilia Longo, Dmitry Murzin, Davide Baldassin, Päivi Mäki-Arvela, Johan Wärnå, Anssi Peuronen, Matej Huš, Blaž Likozar, Atte Aho, Mark Martinez-Klimov, Olha Yevdokimova, Kari Eränen, Mika Lastusaari, Michela Signoretto, 2026, original scientific article Published in DiRROS: 19.12.2025; Views: 26; Downloads: 24
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