131. Rak telesa maternice : 7. Šola o ginekološkem raku2023, ni določena Povzetek: Pred vami je zbornik, kjer so zbrani prispevki predavanj s področij, ki obravnavajo etiologijo in epidemiologijo raka materničnega telesa, predstavljene so najnovejše smernice obravnave bolnic z rakom materničnega telesa, novosti na področju patološke in molekularne diagnostike, na področju slikovne diagnostike ter dileme na področju operativnega zdravljenja. V zadnjem delu zbornika je predstavljeno sistemsko zdravljenje raka materničnega telesa ter zdravljenje z obsevanjem.
Objavljeno v DiRROS: 24.05.2023; Ogledov: 362; Prenosov: 121
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133. Elektrokemoterapija pri zdravljenju raka in genska imunoterapija pri bazalno celičnem karcinomu : klinična študija faze IGregor Serša, Maja Čemažar, 2023, objavljeni znanstveni prispevek na konferenci Povzetek: Elektrokemoterapija je lokalna ablativna terapija, ki temelji na uporabi elektroporacije, kot dostavnega sistema za citostatika bleomicin ali cisplatin. Njena uporaba je predvsem za zdravljenje kožnih tumorjev, kot so kožne metastaze melanoma ali bazalno celični karcinomi. Elektrokemoterapija je v smernicah mnogih evropskih držav. Učinkovitost elektrokemoterapije je v povprečju za vse vrste kožnih tumorjev, 86% objektivnih odgovorov (OR) in 71% popolnih odgovorov (CR) po enkratni terapiji. Za zdravljenje so objavljeni standardizirani postopki, na voljo je več certificiranih generatorjev električnih pulzov in različni tipi elektrod. Obstajajo pa razlike v stopnji odgovorov med različnimi tumorji. Bazalno celični so najbolj občutljivi, melanomski tumorji pa manj. Klinični napovedni dejavniki so zato vrsta tumorjev, ter velikost tumorjev in predhodna zdravljenja. Nedavne študije so dokazale sinergizem njenega delovanja z zaviralci imunskih kontrolnih točk pri bolnikih z melanomom. Na bazalno celičnem karcinomu se izvaja tudi faza I kliničnega preskušanja, katerega namen je preučiti varnost in sprejemljivost zdravila za gensko terapijo, plazmida phIL12.
Ključne besede: rak kože, melanom, elektrokemoterapija
Objavljeno v DiRROS: 18.05.2023; Ogledov: 232; Prenosov: 95
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134. 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: 343; Prenosov: 214
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135. Synthesis and characterization of plasmonic ▫$Au/TiO_2$▫ nanorod solids for heterogeneous photocatalysisŠpela Slapničar, Gregor Žerjav, Janez Zavašnik, Matjaž Finšgar, Albin Pintar, 2023, izvirni znanstveni članek Povzetek: Plasmonic Au (1 wt%) catalysts deposited on hydrothermally synthesized TiO2 nanorods (TNR) were investigated in this study. Based on the duration of mixing of the Au precursor/TNR suspension during the wet impregnation synthesis and parameters of the end calcination, Au/TiO2 catalysts with different sizes of Au nanoparticles (Au NPs) were obtained. The prepared solids were thoroughly characterized by several instrumental techniques to investigate property-activity relationships. Regardless of the size of Au particles on the catalyst surface, an absorption peak at 550 nm occurred in all UV-Vis diffuse reflectance spectra of the investigated Au/TiO2 catalysts, which is characteristic of the localized surface plasmon resonance effect exerted by metallic Au NPs. By measuring the formation of reactive oxygen species under visible-light illumination using various scavengers, the production of superoxide anion radicals (O2•single bond) and hydroxyl radicals were identified, however, the former were found to represent the main reactive oxygen species that govern the oxidation of aqueous bisphenol A (BPA) employed as a model organic pollutant. The activity of Au/TiO2 catalysts for the generation of O2•single bond radicals (and BPA oxidation) increases by increasing the Schottky barrier height, which is due to the slow reduction of water-dissolved O2 on the catalyst surface.
Ključne besede: heterogeneous photocatalysis, titanate nanorods, gold nanoparticles, wet impregnation, localized surface plasmon resonance effect
Objavljeno v DiRROS: 26.04.2023; Ogledov: 484; Prenosov: 220
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136. Influence of the calcination duration of ▫$g-C_3N_4/TiO_2$▫ veggie-toast-like photocatalyst on the visible-light triggered photocatalytic oxidation of bisphenol AMatevž Roškarič, Gregor Žerjav, Matjaž Finšgar, Janez Zavašnik, Albin Pintar, 2023, izvirni znanstveni članek Povzetek: Two commercially available TiO2 (hexagonal-like and spherical-like particles) were used to investigate the effect of g-C3N4 “melting” on the photocatalytic properties of g-C3N4/TiO2 composites. Improvement in the contact between the components was observed when they were thermally treated at 350 °C for an extended period of time (between 2 and 72 h) due to the partial melting and phase fusion of g-C3N4. Consequently, the enhanced contact between the phases allows easier injection of photogenerated electrons from the conduction band of g-C3N4 into TiO2, improving charge carrier separation. The prepared composites were tested for bisphenol A degradation under visible-light illumination, which showed that the components that had been calcined for 24 h performed better due to the improved charge carrier separation. Superoxide anionic radicals and photogenerated holes were identified as active species in the photooxidation experiments conducted under visible-light illumination.
Ključne besede: titanium dioxide, photocatalyst, calcination time, photocatalysis under visible-light illumination, water remediation, bisphenol A
Objavljeno v DiRROS: 17.03.2023; Ogledov: 536; Prenosov: 263
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137. Continental-wide population genetics and post-Pleistocene range expansion in field maple (Acer campestre L.), a subdominant temperate broadleaved tree speciesEric Wahlsteen, Evangelia V. Avramidou, Gregor Božič, Rida Mohammed Mediouni, Bernhard Schuldt, Halina Sobolewska, 2023, izvirni znanstveni članek Povzetek: Acer campestre L. is a rarely silviculturally managed and poorly investigated European tree species which forms seminatural populations and can thus be considered as a model tree for studying post glacial colonisation and phylogeography. Herein, we studied the genetic structure of Acer campestre L. in order to investigate population and genetic diversity clines over the distribution range and for synthesizing the results into a post-Pleistocene range expansion hypothesis. We characterised the genetic diversity and population structure of 61 Acer campestre populations using 12 microsatellite markers. The three detected gene pools are structured geographically creating a longitudinal pattern corresponding with their proposed refugial origin. The results indicated a longitudinal population cline with three strong but highly admixed gene pools. Based on the possible signal from the structure results, a number of phylogeographic dispersal hypotheses were tested using approximate Bayesian computation, and this analysis supported the three refugia scenario with a simultaneous divergence prior to the last glacial maximum. Acer campestre shows a typical decrease in population diversity with northern and western distribution and signatures of surfng alleles in the western expansion axis in 2% of the included alleles. Acer campestre exhibits a high degree of admixture among populations and typical signatures of isolation by distance with no naturally delimited subpopulations. The population structure is rather impacted by geographically, than climatologically means with surfng alleles and alleles strongly limited to geographical areas. Our data also suggest that the population structure still today harbours signatures of post glacial migrations from Mediterranean as well as northern glacial refugia.
Ključne besede: allele surfing, Bayesian inference, glacial refugia, nuclear SSR, sliding window
Objavljeno v DiRROS: 07.03.2023; Ogledov: 417; Prenosov: 194
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138. A review of recombination coefficients of neutral oxygen atoms for various materialsDomen Paul, Miran Mozetič, Rok Zaplotnik, Gregor Primc, Denis Đonlagić, Alenka Vesel, 2023, izvirni znanstveni članek Povzetek: Relevant data on heterogeneous surface recombination of neutral oxygen atoms available in the scientific literature are reviewed and discussed for various materials. The coefficients are determined by placing the samples either in non-equilibrium oxygen plasma or its afterglow. The experimental methods used to determine the coefficients are examined and categorized into calorimetry, actinometry, NO titration, laser-induced fluorescence, and various other methods and their combinations. Some numerical models for recombination coefficient determination are also examined. Correlations are drawn between the experimental parameters and the reported coefficients. Different materials are examined and categorized according to reported recombination coefficients into catalytic, semi-catalytic, and inert materials. Measurements from the literature of the recombination coefficients for some materials are compiled and compared, along with the possible system pressure and material surface temperature dependence of the materials’ recombination coefficient. A large scattering of results reported by different authors is discussed, and possible explanations are provided.
Ključne besede: heterogeneous surface recombination, recombination coefficient, surface catalicity, catalytic efficiency, atom loss coefficient, oxygen, neutral atoms, plasma
Objavljeno v DiRROS: 22.02.2023; Ogledov: 481; Prenosov: 229
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139. Učinkovitost elektrokemoterapije pri bolnicah z rakom dojke z različnim hormonskim statusom : izkušnje INSPECT skupineMarija Snežna Paulin-Košir, Claudia Di Prata, Eva-Maria Grischke, Giuseppe Azzarello, Julie Gehl, Francesca De Terlizzi, Gregor Serša, Maja Čemažar, 2022, objavljeni povzetek strokovnega prispevka na konferenci Ključne besede: onkologija, rak dojke, kemoterapija
Objavljeno v DiRROS: 27.01.2023; Ogledov: 337; Prenosov: 90
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140. Priporočila za obravnavo bolnikov z malignimi limfomiBarbara Jezeršek Novaković, Lučka Boltežar, Andreja Eberl, Gorana Gašljević, Biljana Grčar-Kuzmanov, Monika Jagodic, Tanja Južnič Šetina, Veronika Kloboves-Prevodnik, Gregor Kos, Aleš Christian Mihelač, Milica Miljković, Urška Rugelj, Marija Skoblar Vidmar, Uroš Smrdel, Danijela Štrbac, Miha Toplak, Lorna Zadravec-Zaletel, 2023, strokovna monografija Ključne besede: maligni limfomi, smernice, novotvorbe
Objavljeno v DiRROS: 24.01.2023; Ogledov: 696; Prenosov: 282
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