1901. Small cellular particles from European spruce needle homogenateMarko Jeran, Anna Romolo, Vesna Spasovski, Matej Hočevar, Urban Novak, Roman Štukelj, Vid Šuštar, Matic Kisovec, Apolonija Bedina Zavec, Ksenija Kogej, Aleš Iglič, Polonca Trebše, Veronika Kralj-Iglič, 2023, original scientific article Keywords: Picea abies, spruce needles, extracellular particles, extracellular vesicles, small cellular particles, interferometric light microscopy, exosomes, cell-to-cell communication, drug delivery Published in DiRROS: 07.02.2024; Views: 354; Downloads: 197 Full text (2,49 MB) This document has many files! More... |
1902. A coupled domain–boundary type meshless method for phase-field modelling of dendritic solidification with the fluid flowTadej Dobravec, Boštjan Mavrič, Rizwan Zahoor, Božidar Šarler, 2023, original scientific article Abstract: Purpose - This study aims to simulate the dendritic growth in Stokes flow by iteratively coupling a domain and boundary type meshless method. Design/methodology/approach - A preconditioned phase-field model for dendritic solidification of a pure supercooled melt is solved by the strong-form space-time adaptive approach based on dynamic quadtree domain decomposition. The domain-type space discretisation relies on monomial augmented polyharmonic splines interpolation. The forward Euler scheme is used for time evolution. The boundary-type meshless method solves the Stokes flow around the dendrite based on the collocation of the moving and fixed flow boundaries with the regularised Stokes flow fundamental solution. Both approaches are iteratively coupled at the moving solid–liquid interface. The solution procedure ensures computationally efficient and accurate calculations. The novel approach is numerically implemented for a 2D case. Findings - The solution procedure reflects the advantages of both meshless methods. Domain one is not sensitive to the dendrite orientation and boundary one reduces the dimensionality of the flow field solution. The procedure results agree well with the reference results obtained by the classical numerical methods. Directions for selecting the appropriate free parameters which yield the highest accuracy and computational efficiency are presented. Originality/value - A combination of boundary- and domain-type meshless methods is used to simulate dendritic solidification with the influence of fluid flow efficiently. Keywords: dendritic solidification, Stokes flow, phase-field method, space-time adaptivity, meshless methods, RBF-FD, modified method of regularised sources Published in DiRROS: 07.02.2024; Views: 355; Downloads: 167 Full text (1,07 MB) This document has many files! More... |
1903. Oligomeric fragments distribution, structure and functionalities upon ruthenium-catalyzed technical lignin depolymerizationTina Ročnik, Erika Bartolomei, Anthony Dufour, Sébastien Leclerc, Philippe Arnoux, Blaž Likozar, Edita Jasiukaityte, Miha Grilc, Yann Le-Brech, 2024, original scientific article Published in DiRROS: 07.02.2024; Views: 292; Downloads: 159 Full text (4,79 MB) This document has many files! More... |
1904. Insights into microstructural evolution of tungsten-tungsten carbide plasma facing composite materials prepared by field assisted sintering techniqueAljaž Iveković, Matej Kocen, Petra Jenuš, Anže Abram, Črtomir Donik, Saša Novak, 2023, original scientific article Keywords: tungsten, tungsten carbide, interface, microstructure, fusion energy Published in DiRROS: 07.02.2024; Views: 319; Downloads: 168 Full text (14,95 MB) This document has many files! More... |
1905. In vitro evaluation of stress corrosion cracking susceptibility of PEO-coated rare-earth magnesium alloy WE43Julia Nachtsheim, Songyun Ma, Jaka Burja, Bernd Markert, 2024, original scientific article Keywords: stress corrosion cracking, PEO coating, biodegradable magnesium alloys, SCC test setup, in vitro experiments Published in DiRROS: 07.02.2024; Views: 340; Downloads: 178 Full text (16,00 MB) This document has many files! More... |
1906. Microstructure and properties variation of high-performance grey cast iron via small boron additionsGrega Klančnik, Jaka Burja, Urška Klančnik, Barbara Šetina, Luka Krajnc, Andrej Resnik, 2024, original scientific article Keywords: boron, cast iron, solidification, thermal analysis, Thermo-Calc Published in DiRROS: 07.02.2024; Views: 384; Downloads: 167 Full text (3,11 MB) This document has many files! More... |
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1908. An outline of the history of radiotherapy at the Institute of oncology in Ljubljana from its beginning till 1980sAleksandra Oklješa Lukič, Karmen Hübscher, 2003, professional article Abstract: Background. The article presents the milestone events in the history of radiotherapy at the lnstitute of Oncology since its establishment till 1980s. It reviews the facts deduced from various jubilee publications, seminar reports and staff interviews of the Institute of Oncology. The aim of the article is to present the chronological history of radiotherapy at the Institute of Oncology, and to supplement the fragmented and incomplete recordswritten in the past. Conclusions. Available records are occasionally discrepant, but the most significant events in the history of the Institute ofOncology and its Radiotherapy Ward can nevertheless be ascertained. Published in DiRROS: 06.02.2024; Views: 267; Downloads: 49 Full text (212,78 KB) |
1909. Experiencing professional strains of nurses, radiation engineers and physicians working at the Institute of oncology in LjubljanaAndreja Cirila Škufca Smrdel, 2003, original scientific article Abstract: Background. Since 1974 the term burnout is used in psychology. Burnout describes the end result of stress and has been described by Maslach comprising three basic components: emotional exhaustion, depersonalization andlow personal accomplishment. In this paper we would like to describe some aspects of burnout experiences of the employees of the Institute of Oncology in Ljubljana. Subjects and methods. We used Questionnaire of professional stress, created by Zunter Nagy and Kocmur. In our research 137 health workers from four professional groups participated: physicians, graduated nurses, nurses and radiation engineers, representing 38% of all employees. Results. Wefound out that in the experience the professional stressof all four professional groups is relatively equalized. The most prominent feelings are of fatigue, irritability and work overload. There were no signs of depersonalization - as described by Maslach - reported in our group. In nursesand in radiation engineers a distress is significantly more often displayed due to poorer personal income and poorer material status. Nurses reported significantly more often the intention to change work position (51%),institution (57%) or job (47%). Conclusions. Workstress impacts on the experience and on the thought patterns in those participating in the study. Wecan describe those signs as burnout signs. However, there are more new questions opening in the future as well as the need to a longitudinal approachto the research of this more and more prominent field. Published in DiRROS: 06.02.2024; Views: 322; Downloads: 71 Full text (125,41 KB) |
1910. Detection of apoptotic cells in tumour paraffin sectionsJože Pižem, Andrej Cör, 2003, professional article Abstract: Apoptosis is a distinct form of cell death characterised by specific morphological features and regulated by complex molecular mechanisms. Its deregulation is fundamental for tumour growth and progression and, moreover, anticancer therapies suppress tumour growth mainly by induction of apoptosis. Since the extent of apoptosis in a tumour may have prognostic as well as therapeutic implications, much effort has been invested in developing specificmethods that can be routinely used to detect apoptotic cells in archival formalin fixed paraffin-embedded tissue. Complex molecular pathways are involved in the regulation of apoptosis. Pro-apoptotic signals trigger activation of caspases that specifically cleave target proteins. Cleavage of proteins (caspase substrates) is responsible for morphological changes of apoptotic cells and DNA fragmentation. In the last decade, detection of apoptotic cells in formalin fixed tumour tissue sections has been based mainlyon morphology and characteristic DNA fragmentation. Recently, specific antibodies to activated caspases and cleaved target proteins (including cytokeratin 18, actin and PARP) have been produced that enable accurate detection of apoptosis in paraffin sections. Published in DiRROS: 06.02.2024; Views: 320; Downloads: 75 Full text (170,01 KB) |