91. Patologija malignih tumorjev dojkeJanez Lamovec, 1998, review article Abstract: Merfološka opredelitev tumorjev dojke po načelih moderne kirurške patologije tumorja daje kliniku poleg osnovnih podatkov o naravi tumorja tudi pomembne prognostične informacije. Pri karcinomu dojke so med njimi na vrhu pomembnosti: stanje aksilarnih bezgavk (pozitivne ali negativne bezgavke), stopnja malignosti tumorja, velikost tumorja, verjetno tudi histološki tip. Z razvojem modernih tehnologij lahko tako patolog kot klinik uporabljata še mnoge nove metode, s katerimi opredeljujeta tumor tudi biokemično in molekularno. Zaenkrat pa vse te nove opredelitve še ne dosegajo prognostične veljave klasičnih morfoloških lastnosti. Prav zato pa mora patolog skrbno upoštevati priporočila in pravila o obdelavi kirurškega vzorca, da lahko opredeli vrsto morfoloških lastnosti, ki vsebujejo največ napovedno veljavnih podatkov. V članku govorim o osnovnih morfoloških metodah, o posameznih pomembnejših tumorjih dojke ter o nekaterih novih biokemičnih in molekularnih metodah v diagnostiki raka dojke.
Published in DiRROS: 22.11.2023; Views: 237; Downloads: 74
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92. Smernice za zagotavljanje gozdnega reprodukcijskega materiala : predlog pripravljen v okviru projekta LIFEGENMONKristina Sever, Boris Rantaša, Marijana Vidrih Minić, Natalija Dovč, Janez Kermavnar, Marjana Westergren, Gregor Božič, Matjaž Guček, Andrej Breznikar, Aleš Poljanec, Hojka Kraigher, 2021, treatise, preliminary study, study Keywords: gozdni reprodukcijski material, gozdni semenski objekti, provenienčna območja, vrste, genetska pestrost
Published in DiRROS: 14.11.2023; Views: 396; Downloads: 131
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94. Optimization method based on simplex for surface area improved photocatalytic performance of ▫$g-C_3N_4$▫Matevž Roškarič, Janez Zavašnik, Dániel Dániel Zámbó, Tomaž Kotnik, Sebastijan Kovačič, Gregor Žerjav, Albin Pintar, 2023, original scientific article Abstract: The main objective of the present study was to increase the specific surface area (SBET) of graphitic carbon nitride (g-C3N4) prepared from dicyandiamide by effectively modifying the synthesis procedure using the Simplex optimization method. A remarkable increase in SBET was achieved in only a few steps, with the highest value of 86 m2/g. Compared to the reference material, the improved photocatalyst exhibited enhanced and unique structural, textural, optical, and electronic properties, reflected in the improved ability of the photocatalyst to degrade a variety of organic pollutants dissolved in water. By performing scavenger and spin-trapping experiments, it was confirmed that the major reactive oxygen species formed under visible-light illumination of the enhanced photocatalyst were singlet oxygen (1O2) and superoxide anion radicals (O2–•) with a purposed formation mechanism. The enhanced formation of 1O2 enabled high activity and stability of the optimized materials as well as selective response to degradation of the pharmaceutical compounds studied. By using the simple and fast Simplex optimization algorithm to determine new synthesis parameters, we obtained an improved g-C3N4 that completely degrades bisphenol A under the conditions studied.
Published in DiRROS: 08.11.2023; Views: 264; Downloads: 143
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96. Influence of laser colour marking on the corrosion properties of low alloyed TiTadeja Kosec, Andraž Legat, Janez Kovač, Damjan Klobčar, 2019, original scientific article Abstract: In the field of surface treatment, laser colour marking can be used to produce coloured marks on the surfaces of metals. Laser colour markings can be applied to various materials, but on titanium alloys a wide spectra of vivid colours can be achieved. This study presents an analysis of the corrosion properties of laser treated surfaces that were exposed to aggressive environments. Different samples were prepared with laser light of various power intensities and processing speeds. The samples were prepared on low alloyed Ti. Electrochemical, spectroscopic and microstructural analyses were conducted in order to study the properties of the laser treated surfaces. Corrosion testing showed different effects of laser power and production speed on the properties of the laser treated surfaces. It was shown that a high intensity and slow processing rate affect the surfaces by forming oxides that are relatively stable in a corrosive environment of 0.1 M NaCl. Spectroscopic investigations including scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses showed the differences in chemical structure of the surface layer formed after laser treatment. Similarly, microstructural investigations showed different effects on the surface and sub-surface layer of the laser treated samples.
Keywords: Ti alloy, laser treatment, XPS, corrosion
Published in DiRROS: 25.10.2023; Views: 389; Downloads: 159
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99. ToF-SIMS depth profiling of metal, metal oxide, and alloy multilayers in atmospheres of ▫$H_2$▫, ▫$C_2H_2$▫, CO, and ▫$O_2$▫Jernej Ekar, Peter Panjan, Sandra Drev, Janez Kovač, 2022, original scientific article Keywords: Ions, Layers, Mass spectrometry, Metals, Oxides, SIMS depth profiling H2 C2H2 CO and O2 atmosphere gas flooding cluster secondary ions matrix effect
Published in DiRROS: 18.10.2023; Views: 350; Downloads: 155
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100. Congruence between vascular plants and bryophytes in response to ecological conditions in sustainably managed temperate forests (taxonomic- and trait-based levels)Lado Kutnar, Janez Kermavnar, Marko S. Sabovljević, 2023, original scientific article Abstract: Vascular plant species (VP) and bryophytes (B) constitute a significant portion of forest biodiversity and respond to both management intensity and natural disturbances within forests. In this study, we investigated the cross-taxa congruence between understorey VP and B at both diversity and composition levels across a wide range of sustainably managed forests in Slovenia. The taxonomic and functional characteristics of the selected plant groups were studied, with a particular emphasis on ground-dwelling species. We employed a trait-based approach to examine the functional characteristics. On average, the species richness of B in sustainably managed temperate forests increased with the corresponding number of VP. Furthermore, a moderate positive correlation in species composition between the studied groups of ground-dwelling organisms was also observed. The ground-dwelling VP and B were congruent in terms of trait-based composition, which was influenced by soil reaction and nutrients and light availability, while trait-based diversity was only slightly similar in response to moisture. A negative correlation between the composition of stress-tolerant VP and B hemeroby was found, indicating forest environments with a low level of disturbance. This is likely due to the sustainable management of Slovenian forests, where climate change and natural disturbances have intensified in recent years. A cross-taxon comparison of the two groups at four different levels, namely taxonomic-based diversity and composition and trait-based diversity and composition, revealed varying degrees of congruence. It is therefore important to monitor the status and temporal trends of both groups from different aspects to draw reliable conclusions.
Keywords: understory, mosses, terricolous species, diversity, composition, taxonomy, life-history traits, environmental gradients, managed forest, ICP Forests program, Slovenia
Published in DiRROS: 10.10.2023; Views: 494; Downloads: 180
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