41. Environmental hazard of polypropylene microplastics from disposable medical masks : acute toxicity towards Daphnia magna and current knowledge on other polypropylene microplasticsAnita Jemec Kokalj, Andraž Dolar, Damjana Drobne, Marjan Marinšek, Matej Dolenec, Luka Škrlep, Gregor Strmljan, Branka Mušič, Andrijana Sever Škapin, 2022, izvirni znanstveni članek Povzetek: The COVID-19 pandemic has increased the use of disposable plastics, including medical masks, which have become a necessity in our daily lives. As these are often improperly disposed of, they represent an important potential source of microplastics in the environment. We prepared microplastics from polypropylene medical masks and characterised their size, shape, organic chemical leaching, and acute toxicity to the planktonic crustacean Daphnia magna. The three layers of the masks were separately milled and characterised. Each of the inner frontal, middle filtering, and outer layers yielded different types of microplastics: fibres were obtained from the inner and outer layer, but irregular fragments from the middle layer. The shape of the obtained microplastics differed from the initial fibrous structure of the intact medical mask layers, which indicates that the material is deformed during cryo-milling. The chemical compositions of plastics-associated chemicals also varied between the different layers. Typically, the inner layer contained more chemicals related to antimicrobial function and flavouring. The other two layers also contained antioxidants and their degradation products, plasticisers, cross-linking agents, antistatic agents, lubricants, and non-ionic surfactants. An acute study with D. magna showed that these microplastics do not cause immobility but do physically interact with the daphnids. Further long-term studies with these microplastics are needed using a suite of test organisms. Indeed, studies with other polypropylene microplastics have shown numerous adverse effects on other organisms at concentrations that have already been reported in the environment. Further efforts should be made to investigate the environmental hazards of polypropylene microplastics from medical masks and how to handle this new source of environmental burden.
Ključne besede: COVID-19 pandemic, plastics-associated chemicals, Daphnia magna, fibres, fragments, nanofibres, polypropylene microplastics, single-use plastic
Objavljeno v DiRROS: 05.05.2023; Ogledov: 385; Prenosov: 244
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42. Innovative calcium carbonate-based products to repair cracked cement mortarsMartina Zuena, Andreja Pondelak, Enrico Garbin, Matteo Panizza, Luca Nodari, Andrijana Sever Škapin, Luka Škrlep, Gilberto Artioli, Patrizia Tomasin, 2022, izvirni znanstveni članek Povzetek: The durability of Portland cement mortars is often affected by environmental factors, which can cause physicochemical and mechanical degradation processes. In this study, the performance of three products, calcium acetoacetate and calcium tetrahydrofurfuryloxide dissolved in two different solvents developed and tested as stone consolidants, was evaluated in terms of crack filling or sealing and consolidation. Realistic cracks were induced in quasibrittle cement mortar prisms using a custom-designed test rig. The effectiveness and the performance of the considered treatments, investigated on specimens, were evaluated by optical and scanning electron microscopy, colourimetry, water absorption rate, ultrasonic pulse velocity, and surface hardness measurements. Results revealed that, in the examined conditions, the products were more suitable as surface consolidants than as crack fillers.
Ključne besede: cement mortars, 20th century architecture conservation, calcium acetoacetate, calcium alkoxide, concrete repair, open access
Objavljeno v DiRROS: 04.05.2023; Ogledov: 410; Prenosov: 232
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43. Izbor drevesnih vrst z največjim neizkoriščenim potencialom uporabnosti lesa v luči podnebnega segrevanja in prihodnjih sprememb vrstne sestave slovenskih gozdov : Projekt REWINNUSE: Izroček št. 1.2.1Luka Krajnc, Polona Hafner, Jožica Gričar, 2022, elaborat, predštudija, študija Ključne besede: kakovost lesa, perspektivne drevesne vrste, Quercus cerris, cer, Robinia pseudoacacia, navadna robinija, Populus sp., topol, Pinus nigra, črni bor, Pseudotsuga menziesii, navadna ameriška duglazija, Castanea sativa, pravi kostanj
Objavljeno v DiRROS: 27.03.2023; Ogledov: 573; Prenosov: 128
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45. Electrochemically-grown chloride-free ▫$Cu_2O$▫ nanocubes favorably electroreduce ▫$CO_2$▫ to methane : the interplay of appropriate electrochemical protocolStefan Popovic, Mohammed Azeezulla Nazrulla, Primož Šket, Kamal Khaja Mohaideen, Blaž Likozar, Luka Suhadolnik, Luka Pavko, Angelja Kjara Surca, Marjan Bele, Nejc Hodnik, 2023, izvirni znanstveni članek Objavljeno v DiRROS: 14.03.2023; Ogledov: 572; Prenosov: 104
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46. Radikalna teologija kot hermenevtika nemogočega : John Caputo in dogodkovnost resniceLuka Trebežnik, 2022, izvirni znanstveni članek Povzetek: Članek se posveča delu Johna Caputa, sodobnega misleca s področja radikalne teologije. Z analizo osrednjih pojmov, ki jih je izbral za oznake svojih projektov, je proučena kontinuiteta njegove pisave in poudarjena inovativnost njegovih pristopov k postmoderni religijski misli. Prikazana je njegova miselna formacija in premišljene so nekatere izmed ključnih etap njegovega ustvarjanja, še zlasti njegovi pristopi k različnim teorijam hermenevtike in novi zasnovi pojma religije. V končni fazi je v članku poudarjena možnost prihodnjih branj in novih razumevanj Caputovega dela.
Ključne besede: radikalna teologija, hermenevtika, dekonstrukcija, postmoderna religija
Objavljeno v DiRROS: 01.03.2023; Ogledov: 377; Prenosov: 181
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47. The burning monk : a review of a buddhist’s self-immolation during the Vietnam warLuka Benedičič, 2022, izvirni znanstveni članek Povzetek: This paper is a study of the self-immolation of the Mahayana Buddhist monk Thich Quang Duc in 1963, Saigon. It highlights some of the reactions to this event, as well as more recent academic analyses, and contrasts them with the letter of the monk Thich Nhat Hanh who disagreed that the self-immolation was a protest or suicide. This ontological discrepancy motivated new research approaches. In order to show it as studyable, the paper thematizes it by introducing the conceptual pair of visible-invisible. It presents a discussion by Mario Blaser that addresses the field of epistemology and ontology, also commenting on some fundamental theoretical approaches such as the ontological turn and cosmopolitics. The paper argues that the invisible – for example ontological – contents of the event have been overlooked in many analyses, or oversimplified by using an objectivist or political vocabulary.
Ključne besede: Chinese religion, Buddhism, engaged Buddhism, politics, cosmopolitics, ontological turn, Western-centrism
Objavljeno v DiRROS: 28.02.2023; Ogledov: 355; Prenosov: 170
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48. Podlaga za izdelavo usmeritev pri gospodarjenju z navadno smreko v SlovenijiLuka Krajnc, Mitja Skudnik, Tom Levanič, Matjaž Čater, Aleksander Marinšek, Janez Zafran, 2022, izvirni znanstveni članek Povzetek: V prispevku predstavimo podlago za izdelavo usmeritev pri gospodarjenju z navadno smreko v Sloveniji. Izvedli smo več ločenih analiz z istim ciljem: pripraviti strokovno utemeljene in s podatki podprte usmeritve za gospodarjenje z navadno smreko v Sloveniji v prihodnjih desetletjih. Tako smo v tem prispevku združili rezultate meritev nacionalne gozdne inventure, analizo priraščanja smreke, analize vrstne pestrosti ter pregled osnutkov načrtov za gozdnogospodarska območja. Namen tega prispevka je predstavitev rezultatov štirih ločenih sklopov analiz podatkov, ki so predstavljali osnovo za izdelavo usmeritev pri gospodarjenju z navadno smreko, objavljenih v naslednjem prispevku.
Ključne besede: navadna smreka, podnebne spremembe, gospodarjenje
Objavljeno v DiRROS: 20.02.2023; Ogledov: 618; Prenosov: 196
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50. Zdravljenje razsejanega, trojno negativnega raka dojk z atezolizumabom in nab-paklitakselom : podatki iz realnega svetaDimitar Stefanovski, Luka Dobovišek, Tanja Ovčariček, Gorana Gašljević, Simona Borštnar, 2022, objavljeni povzetek strokovnega prispevka na konferenci Ključne besede: onkologija, rak dojke, kemoterapija
Objavljeno v DiRROS: 27.01.2023; Ogledov: 481; Prenosov: 108
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