Iskanje po repozitoriju

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Opis: The first part of the title of the article is borrowed from the afterword A for Aurora, A for Autobiography in the Slovenian translation of George Sand’s seminal work Histoire de ma vie, published by the feminist publishing house Delta, marking the bicentenary of French writer’s birth. 1 Analyzing the discourse on George Sand in the Slovenian literary field, we have observed a unique ambiguity compared to the discourse on other canonized authors and their Slovene reception. We argue that George Sand is a site of ambiguous discourse. Departing from the approaches of the renowned American historian Joan Wallach Scott, herself inspired by the Foucauldian epistemology, we are interested in how and why this discourse came into being, how the representations of George Sand were discursively established, and what contradictions are inherent in this debate.
Ključne besede: Slovenian literature, feminism, translation, reception
Objavljeno v RUNG: 07.06.2024; Ogledov: 268; Prenosov: 3
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Opis: Onesnaženost okolja iz leta v leto predstavlja večji problem, na kar vpliva veliko dejavnikov. Ena izmed možnosti reševanja okolja je izboljšanje tehnologij ogrevanja. Slovenija je država z veliko gozdnate površine in prav zaradi tega je tu zaznan potencial napredka prihodnosti z vidika predelave lesa in ogrevanja z njegovo uporabo. Ekonomsko stroškovno učinkovit, eden izmed najmanjših onesnaževalcev okolja in enostaven za uporabo so nekatere od največjih prednosti uporabe lesenih peletov. Leseni peleti pa niso edini možen viri trajnostnih tehnologij ogrevanja, kar bomo ugotovili skozi magistrsko nalogo. Pri takšnih tehnologijah ogrevanja je potrebno, da je produkt koristen za družbo in gospodarstvo in, da nima negativnega vpliva na okolje. Motivacija za izbrano temo magistrske naloge izvira iz želje po novem znanju na tem področju, saj verjamem, da se po področje izjemno dobro razvijalo in da obstaja velik potencial za napredek. Namen magistrske naloge je analiziranje ogrevanja s pomočjo trajnostnih tehnologij ogrevanja s stroškovnega, uporabniškega in okolje varstvenega vidika. Končni cilj naloge je ugotoviti kateri način ogrevanja je najbolj efektiven in cenovno dostopen, pa tudi kateri vir za ogrevanje je trenutno najbolj uporabljen na trgu.
Ključne besede: ogrevanje, samooskrba, trajnostne tehnologije, gospodarstvo, ogljični odtis, Slovenija, magistrske naloge
Objavljeno v RUNG: 05.06.2024; Ogledov: 346; Prenosov: 2
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Opis: Plastics are based on organic polymers that are sensitive to the environment in which they find themselves and will gradually decay through a variety of chemical reactions. This process is of great importance for the transformation and persistence of microplastics (MPs) that pollute the environment. The rate of degradation depends on two major factors: Firstly, the intrinsic properties of the polymers, such as chemical structure, molecular weight, crystallinity and the presence of additives, fillers or reinforcement and secondly, the environment to which they are exposed. The degradation rate of plastic will vary in different environmental matrices like soil, freshwater, seawater, wastewater, land etc., as well as in diverse environmental conditions like UV radiation, temperature, humidity, the effect of pollutants etc. Plastic mainly undergoes two fundamental reactions: oxidation and hydrolysis and the chemical structure of the polymer and its additives plays a key role in the degradation mechanism of plastic. Polyolefins having a carbon-only main chain are resistant to hydrolysis but susceptible to oxidation, whereas polyesters and polyamides containing heteroatoms are sensitive to hydrolysis and much more resistant to oxidation. In the context of the present work, five different studies were done involving both naturally degraded plastic and accelerated weathering of plastics in the form of small particles, MPs. In the first study, natural degraded polyethylene (PE) and polypropylene (PP) samples with a life span of more than forty years were collected from the environment and their physiochemical properties were analysed. The results show that red coloured PE samples were more degraded as compared to blue coloured samples, indicating that pigment plays a key role in the degradation. The PP sample shows extreme surface degradation, leading to fragmentation and the generation of MPs. In the second study, the effect of hydrodynamic cavitation on MPs in waste water treatment plant sludge was evaluated. PE, PP, polyethylene terephthalate and polyamide were extracted from the sludge. It was found that hydrodynamic cavitation does not disintegrate the MPs, although it removes some toxic metals and shows cell disruption mechanisms. Other studies were done with accelerated weathered MPs, which include PE, PP and tire wear particles (TWP), that were treated in accordance with an ISO 4892 standard weathering procedure that mimics natural weathered conditions. In the third study, we used weathered PE films to evaluate the synergistic adsorption behaviour of two pollutants, namely triclosan (TCS) and methylparaben (MeP). It was found that weathered MPs adsorb more pollutants and the adsorption behaviour of TCS is enhanced in the presence of MeP. In the fourth study, the magnetic extraction of pristine and weathered PE and TWP particles was performed. The results confirmed that the magnetic VI extraction of weathered MPs is difficult as compared to pristine MPs as their surface becomes more hydrophilic with weathering. In the fifth study, the effect of weathering on the density of PE and PP was evaluated. We found that weathering enhances the density of polyolefins, which is one of the main reasons for the observed sinking of polyolefin MPs in water.
Ključne besede: accelerated weathering, aging, density, magnetic separation, pigment, plastic degradation, pollutants, polyethylene, polyolefin, polypropylene, sinking, tire wear particles, dissertations
Objavljeno v RUNG: 04.06.2024; Ogledov: 377; Prenosov: 0
Celotno besedilo (7,35 MB)

Ključne besede: clitics, enclitics, Slavic, syntax, Slovenian, Slovak, Czech, Bulgarian, Macedonian, BCMS, Polish, clitic cluster, stress
Objavljeno v RUNG: 31.05.2024; Ogledov: 309; Prenosov: 1
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Opis: Forest environments are exposed to multiple stressful factors of both abiotic and biotic nature which may lead to their massive decline [1]. Understanding the molecular mechanisms of specific stress conditions and monitoring the fluctuations of reliable forest plant biomarkers with affordable methods would be instrumental for assessing stress levels over the time. Ascorbate peroxidase (APX) represents a suitable plant biomarker. APX is a hydrogen peroxide-scavenging enzyme the critical role of which has been described in several plants, both herbaceous and woody. Its activity generally increases under oxidative stress during which its peroxide detoxifying function is part of the wider ascorbate-glutathione cycle [2]. The development of reagents to detect such fluctuations would help the evaluation of plant physiological conditions. In this study, nanobodies (Nbs) targeting APX have been identified. Nbs correspond to the variable domain of heavy chain-only antibodies derived from camelids. They are small (15 kDa), stable, and can be easily produced in bacteria fused to different protein tags according to the downstream applications [3]. After their isolation by biopanning against soluble APX, they have been produced and underwent a biophysical characterization in combination with their antigen (APX-Nb complex) to identify the best binders in terms of stability and affinity. The protein complex characterization was supported by Instruct-ERIC and mainly performed at the BIOCEV institute of Prague. Data from Mass Photometry and Dynamic Light scattering evidenced the formation of the protein complexes, whereas the preliminary data of Hydrogen-Deuterium Exchange Mass Spectrometry, performed with the aim of identifying the residues involved in the paratope/epitope interface, were insufficient to clarify the issue and rather suggested that the interaction has low affinity. This indication was then confirmed by ELISA assay. The combination of multiple methods allowed a comprehensive sample characterization which will require further structural analyses to provide a complete picture of the APX-Nb complex. [1] G. Marie. B. C. M. B. C. Walters, “Forest decline and tree mortality in a southeastern Ohio oak-hickory forest,” Ohio Journal of Science , vol. 97, 1997. [2] O. Chew, J. Whelan, and A. H. Millar, “Molecular Definition of the Ascorbate-Glutathione Cycle in Arabidopsis Mitochondria Reveals Dual Targeting of Antioxidant Defenses in Plants,” Journal of Biological Chemistry, vol. 278, no. 47, 2003, doi: 10.1074/jbc.M307525200. [3] S. Muyldermans, “A guide to: generation and design of nanobodies,” FEBS J, vol. 288, no. 7, pp. 2084–2102, Apr. 2021, doi: 10.1111/febs.15515.
Ključne besede: nanobody, ascorbate peroxidase, plant stress, protein complex, biophysical methodologies
Objavljeno v RUNG: 31.05.2024; Ogledov: 413; Prenosov: 0
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