1. First utilization of magnetically-assisted photocatalytic iron ▫$oxide-TiO_2$▫ nanocomposites for the degradation of the problematic antibiotic ciprofloxacin in an aqueous environmentJosip Radić, Gregor Žerjav, Lucija Jurko, Perica Bošković, Lidija Fras Zemljič, Alenka Vesel, Andraž Mavrič, Martina Gudelj, Olivija Plohl, 2024, izvirni znanstveni članek Opis: The emergence of antimicrobial resistance due to antibiotics in the environment presents significant public health, economic, and societal risks. This study addresses the need for effective strategies to reduce antibiotic residues, focusing on ciprofloxacin degradation. Magnetic iron oxide nanoparticles (IO NPs), approximately 13 nm in size, were synthesized and functionalized with branched polyethyleneimine (bPEI) to obtain a positive charge. These IO-bPEI NPs were combined with negatively charged titanium dioxide NPs (TiO2@CA) to form magnetically photocatalytic IO-TiO2 nanocomposites. Characterization techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), electrokinetic measurements, and a vibrating sample magnetometer (VSM), confirmed the successful formation and properties of the nanocomposites. The nanocomposites exhibited a high specific surface area, reduced mobility of photogenerated charge carriers, and enhanced photocatalytic properties. Testing the photocatalytic potential of IO-TiO2 with ciprofloxacin in water under UV-B light achieved up to 70% degradation in 150 min, with a degradation rate of 0.0063 min−1. The nanocomposite was magnetically removed after photocatalysis and successfully regenerated for reuse. These findings highlight the potential of IO-TiO2 nanocomposites for reducing ciprofloxacin levels in wastewater, helping curb antibiotic resistance.
Ključne besede: photocatalytic degradation, magnetic iron oxide-TiO2 nanocomposites, hetero-agglomeration, multifunctionality, antibiotic ciprofloxacin, antimicrobial resistance
Objavljeno v RUNG: 09.09.2024; Ogledov: 1177; Prenosov: 6
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2. An improved low-input resistance folded-cascode transimpedance amplifier for giga-bit per second optical communication front-endsSoorena Zohoori, Ahmad Hosseini, Mehrdad Amirkhan Amirkhan Dehkordi, Seyed Mehdi Mirsanei, 2023, izvirni znanstveni članek Opis: The present study is devoted to articulating a modified folded‐cascode circuit, to make folded‐cascode structures an attractive configuration as a transimpedance amplifier (TIA) for being employed in Giga‐bit per second optical communication receiver systems. Giga‐bps communication receivers are highly necessitating circuits to isolate the input parasitic capacitance of the photodiode. The present modification makes folded cascodes comparable to the famous regulated cascode (RGC) structures by isolating this parasitic capacitor almost by the same quantity. The system is shown to be capable of operating at 2.5 Gbps up to 8 Gbps data rate with a fixed bandwidth. The paper analyzes and evaluates the designed circuit mathematically, and the obtained simulated results from Cadence using TSMC 65 nm CMOS validate the suitability of the modified circuit as a TIA.
Ključne besede: improved folded-cascode, low input resistance, low noise, optical receiver, transimepdance amplifier
Objavljeno v RUNG: 08.12.2023; Ogledov: 2548; Prenosov: 5
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3. Learn to Resist : New glocal resilience strategies of cultural institutions for a solidary art productionPeter Purg, Birste Sonnenberg, 2023, radijska ali televizijska oddaja, podkast, intervju, novinarska konferenca Opis: Closures of cultural institutions as a result of the Corona pandemic, right-wing populist cultural agendas (and even policies!) that work against independent media and cultural workers, and then the Russian attacks on Ukrainian cultural institutions, attempting to erase a country's cultural identity, and artistic vitality. And then there's an obviously more and more fragile nature -- the waters below and the atmospheres above us in chaos.
In times of multiple, overlapping crises, cultural institutions and festivals face the challenge of addressing these grievances through glocal processes of adaptation and learning, to become RESILIENT = prepared for change and emergencies, mastering them as robustly and creatively as possible. What resilience strategies are needed at the regional and global level to enable sustainable (international) cultural production and to establish solidarity-based forms of partnership? What are the most interesting examples -- from here, and there, and beyond?
With Serge Klymko (Kyiv Biennale),Ukraine, Mei Shimada (CCBT Tokyo), Japan, Birte Sonnenberg (HELLERAU / Hybrid Biennale), Germany, Moderated by: pETER Purg (Univ. of Nova Gorica / Go!2025), Slovenia
Schließungen von Kultureinrichtungen infolge der Corona-Pandemie, rechtspopulistische Kulturpolitik gegen unabhängige Medien und Kulturschaffende und die russischen Angriffe auf ukrainische Kulturinstitutionen, die die kulturelle Identität des Landes auslöschen sollen. In Zeiten multipler, sich überlagernder Krisen haben Kulturinstitutionen und Festivals die Herausforderung, diesen Missständen über glokale Anpassungs- und Lernprozesse zu begegnen. Immer mit dem Ziel, auf Veränderungen und Notfälle eingestellt zu sein und diese möglichst robust und kreativ zu meistern. Welche Resilienzstrategien auf regionaler und globaler Ebene braucht es, um nachhaltig (internationale) Kulturproduktion zu ermöglichen und solidarische Formen der Partnerschaften zu etablieren?
Mit Serge Klymko (Kyiv Biennale), Mei Shimada (CCBT Tokyo) und Birte Sonnenberg (HELLERAU / Hybrid Biennale), moderiert von Peter Purg (Universität Nova Gorica)
Ključne besede: resistance, resilience, fragility, war, post-war, post-covid
Objavljeno v RUNG: 11.10.2023; Ogledov: 3020; Prenosov: 5
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6. Italian Humanist Photography from Fascism to the Cold WarMartina Caruso, znanstvena monografija Opis: Spanning four decades of radical political and social change in Italy, this interdisciplinary study explores photography’s relationship with Italian painting, film, literature, anthropological research and international photography. Evocative and powerful, Italian social documentary photography from the 1930s to the 1960s is a rich source of cultural history, reflecting a time of dramatic change. This book shows, through a wide range of images (some published for the first time) that to fully understand the photography of this period we must take a more expansive view than scholars have applied to date, considering issues of propaganda, aesthetics, religion, national identity and international influences. By setting Italian photography against a backdrop of social documentary and giving it a distinctive place in the global history of photography, this exciting volume of original research is of interest to art historians and scholars of Italian and visual culture studies.
Ključne besede: History of photography, documentary photography, social photography, humanist photography, painting, film, literature, anthropology, fascism, antifascism, Mussolini, resistance, partisans, masculinity, peasants, ruralism, religion, Catholicism, Carlo Levi, Christ Stopped at Eboli, propaganda, national identity, aesthetics, politics
Objavljeno v RUNG: 16.01.2023; Ogledov: 3286; Prenosov: 0
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7. Human Sacrifice: The Scapegoat in Partisan Photographs at the End of the Italian Civil WarMartina Caruso, 2019, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Opis: This essay examines how Partisan self-representation in photography directly participated in the creation of a post-war humanist visual culture embedded in an idea of Christian redemption.
Ključne besede: Second World War, Italy, Civil War, Liberation, Partisan movement, resistance, fascism, antifascism, Allies, Nazis, photography, Christianity, Catholicism, Communism, reconstruction photography, martyrdom, masculinity, gender
Objavljeno v RUNG: 13.01.2023; Ogledov: 2243; Prenosov: 0
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8. A comparative study of nanolaminate CrN/Mo2N and CrN/W2N as hard and corrosion resistant coatingsMarco Beltrami, Andraž Mavrič, Simone Dal Zilio, Mattia Fanetti, Gregor Kapun, Marco Lazzarino, Orfeo Sbaizero, Miha Čekada, 2013, izvirni znanstveni članek Opis: Nanolaminate coatings (NLC) consisting of alternated CrN coupled with either cubic tungsten nitride (β-W2N) or molybdenum nitride (γ-Mo2N) were deposited on cold worked tool steel substrates using reactive DC reactive magnetron sputtering for improved mechanical and corrosion resistance. The CrN/γ-Mo2N and CrN/β-W2N nanolaminate systems were found to perform better than the corresponding single-layer systems, with both mechanical and electrochemical properties improving by decreasing the individual layer thickness from 100 to 5 nm. The CrN/β-W2N NLC combined the high hardness value of W2N with the low corrosion current of CrN. The CrN/γ-Mo2N NLC showed synergistic improvements consisting of both higher hardness and lower corrosion currents with respect to the constituent materials alone. The dependence of mechanical and corrosion properties on the bilayer period is discussed in terms of the grain size, residual stresses and texture of the constituent materials and the nanostructured character of the multilayer architecture.
Ključne besede: Nanolayered coatings, Transition metal nitrides, Sputtering, Nanoindentation, Corrosion resistance, Mechanical properties
Objavljeno v RUNG: 12.01.2023; Ogledov: 2662; Prenosov: 0
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9. Antimicrobial susceptibility profile of airborne bacteria and fungi at Owena Market, Osun State, NigeriaGbenga Folorunsho Oginni, Sandra Oloketuyi, Olufunke Chukwu, Janet Odunayo, 2017, izvirni znanstveni članek Opis: Environmental conditions and human activities influence the ubiquity and diversity of microorganisms in the atmosphere thereby acquiring the ability to resist antibiotics which poses serious public threat. Airborne bacteria and fungi isolated using settling plate method from three different points (where kolanuts, meat and onions are sold) at Owena Market, Osun state, Nigeria were assayed for antimicrobial susceptibility using disc diffusion. The microorganisms were identified as Staphylococcus aureus, Bacillus subtilis, Bacillus cereus, Proteus vulgaris, Bacillus megaterium, Alcaligenes spp., Aeromonas spp., Escherichia coli, Micrococcus spp., Streptococcus spp., Mortierella polycephala, Epicoccum nigrum, Alternaria spp., Penicillium chrysogenum, Aspergillus flavus, Acremonium spp., Penicillium oxalicum, Cladosporium cladosporiodes, Rhizopus stolonifer, Stemphylium spp., and Trichoderma spp. About 30% of the bacterial isolates were resistant to the antibacterial agents (antibiotics) and all the bacterial isolates were resistant to at least four or more antibiotics while 18% and 64% of the fungi isolated were susceptible to griseofulvin and ketoconazole, respectively. This study shows that the market environment serves as reservoirs for multiple antibiotic resistant bacteria and fungi capable of causing infectious diseases.
Ključne besede: Airborne microbes, air monitoring, diversity, human activities, multidrug resistance
Objavljeno v RUNG: 14.01.2021; Ogledov: 3588; Prenosov: 0
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10. Antibiotics and their different application strategies in controlling the biofilm forming pathogenic bacteriaFazlurrahman Khan, Dung T N Pham, Sandra Oloketuyi, Young-Mog Kim, 2020, pregledni znanstveni članek Opis: Background: The establishment of a biofilm by most pathogenic bacteria has been known as one of the resistance mechanisms against antibiotics. A biofilm is a structural component where the bacterial community adheres to the biotic or abiotic surfaces by the help of Extracellular Polymeric Substances (EPS) produced by bacterial cells. The biofilm matrix possesses the ability to resist several adverse environmental factors, including the effect of antibiotics. Therefore, the resistance of bacterial biofilm-forming cells could be increased up to 1000 times than the planktonic cells, hence requiring a significantly high concentration of antibiotics for treatment.
Methods: Up to the present, several methodologies employing antibiotics as an anti-biofilm, antivirulence or quorum quenching agent have been developed for biofilm inhibition and eradication of a pre-formed mature biofilm.
Results: Among the anti-biofilm strategies being tested, the sub-minimal inhibitory concentration of several antibiotics either alone or in combination has been shown to inhibit biofilm formation and down-regulate the production of virulence factors. The combinatorial strategies include (1) combination of multiple antibiotics, (2) combination of antibiotics with non-antibiotic agents and (3) loading of antibiotics onto a carrier.
Conclusion: The present review paper describes the role of several antibiotics as biofilm inhibitors and also the alternative strategies adopted for applications in eradicating and inhibiting the formation of biofilm by pathogenic bacteria.
Ključne besede: Antibiotics, biofilm inhibition, multiple antibiotics, pathogenic bacteria, resistance mechanism, virulence factors
Objavljeno v RUNG: 14.01.2021; Ogledov: 4364; Prenosov: 0
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