1091. Metodologija za oceno stanja lesnopredelovalnega sektorja : tržni potenciali okroglega lesa v Sloveniji in njegova nadaljnja uporabaŠpela Ščap, Janez Zafran, Nike Krajnc, 2022, elaborat, predštudija, študija Ključne besede: gozdno-lesni sektor, gozdni lesni sortimenti, okrogli les, lesnopredelovalna panoga, zaloga ogljika v lesnih izdelkih
Objavljeno v DiRROS: 31.01.2024; Ogledov: 227; Prenosov: 0 |
1092. Primary non-Hodgkin lymphoma of the cecum: a case reportMateja Kropivnik, Breda Jamar, Bojana Černelč, 2002, strokovni članek Povzetek: Background. Primary lymphoma of the colon is rare, constituting 0.4 % of primary colonic malignancies and usually involves cecum or rectum. The aim of this paper is to present the role and the importance of double contrast bariumenema (DCBE) in the diagnostic process. Case report. A 77 years old malewas admitted because of suspected inflammation in the area of total endoprosthesis of the left hip, inserted ten years before. Listeria monocytogenes was isolated from the aspirate and the patient treated with antibiotics. Twenty years ago the patient underwent nephrectomy because of hypernephroma of left kidney. At the time of admission he had sideropenic anaemia and he was febrile. Conclusion. The patient underwent many diagnostic procedures: ultrasound (US), computed tomography (CT), double contrast barium enema, which showed a tumour in the cecum, small bowel follow-through and scintigraphy. The diagnosis of primary non-Hodgkin lymphoma was established byhistology after biopsy at colonoscopy.
Objavljeno v DiRROS: 31.01.2024; Ogledov: 221; Prenosov: 48
 Celotno besedilo (80,69 KB) |
1093. Relevance of inter-particle interaction in directed energy deposition powder streamTijan Mede, Matjaž Godec, 2024, izvirni znanstveni članek Povzetek: Blown powder dynamics is one of the aspects of Directed Energy Deposition (DED) with a major influence on deposition quality and potential for improvement in simulation. Most currently employed computational models discard powder grain collisions as negligible, although little explicit evidence for that claim exists. A Discrete Element Method approach is thus employed in the present work to simulate the actual number of grain collisions in a powder stream of a commercial discrete coaxial nozzle and how that number varies with the key processing parameters. While the number of powder grain collisions is found to in fact be negligible at one side of the usable parameter spectrum, the opposite side results in as many as 84% of all the powder grains being involved in inter-granular collisions with an average rebound angle of 14◦, challenging the established hypothesis of the negligibility of this phenomena.
Ključne besede: DED, powder stream, grain collisions, DEM
Objavljeno v DiRROS: 31.01.2024; Ogledov: 202; Prenosov: 106
Celotno besedilo (1,65 MB)
Gradivo ima več datotek! Več... |
1094. Environment and breast cancer - the role of xenooestrogens in breast cancerAndrej Plesničar, Branko Družina, Viljem Kovač, Božo Kralj, 2002, izvirni znanstveni članek Povzetek: The survival rate of breast cancer patients has not changed much in the last few decades in developed countries. In order to improve the efficacy of breast cancer prevention and treatment, the role of xenooestrogens in the mechanisms of its development has been evaluated. These industrial chemical bear little structural resemblance to each other and bind to the oestrogen receptors of exposed cells and/or trigger oestrogenic responses in laboratory test systems. Exposure to xenooestrogens has been regarded as a risk factor for carcinogenesis and a preventable cause of breast carcinoma. Several epidemiological and experimental studies in in vivo and in vitro conditions of the influence of xenooestrogens on the occurrence of breast cancer have been conducted in the last decades and have shown ambiguous results. No increase of breast carcinoma incidence could be found in women who were exposed to relatively high concentrations of xenooestrogens for extended periods and small quantities of these compounds that are present in the environment probably cannot act as etiological agents for the occurence of this disease. A multi step approach is suggested regarding the sequence of studies and measures that should be taken to further assess the importance of xenooestrogens on breast cancer carcinogenesis.
Ključne besede: dojka, ksenoestrogeni, novotvorbe
Objavljeno v DiRROS: 31.01.2024; Ogledov: 197; Prenosov: 49
Celotno besedilo (96,95 KB) |
1095. Endovascular treatment of intracranial arteriovenous malformationsTomaž Šeruga, 2002, izvirni znanstveni članek Povzetek: Background. The aim of the study was the introduction of endovascular treatment of cerebral arteriovenous malformations (AVM) with superselective embolization with polymerisation agent. Case reports. Endovascular embolization was performed in five patients with cerebral AVMs. Three of these patients were presented with intracerebral haemathomas whereas in other two patients, cerebral AVM was an incidental finding. Superselective catheterisation of AVMs was performed and acrylic glue was selectively injected into the nidus. Conclusions. Control cerebral angiography after embolization of AVM showed different results. In one patient, AVM was totally occluded after three sessions and in the second case AVM was occluded in a single session. The rate of occlusion in other two cases was estimated between 70% in 80%. Both of these two patients underwent surgery. One patient is still in the process of treatment. Endovascular treatment of cerebral AVMs with superselective embolization with liquid cyanoacrilyc adhesive agent is a safe and effective alternative treatment paths next to microsurgery. Endovascular tratment in combination with radiosurgery could become the method of choice in the therapy of cerebral AVMs in the future.
Objavljeno v DiRROS: 31.01.2024; Ogledov: 205; Prenosov: 53
Celotno besedilo (106,45 KB) |
1096. |
1097. Fine particulate matter (PM2.5) exposure assessment among active daily commuters to induce behaviour change to reduce air pollutionAnja Ilenič, Alenka Mauko Pranjić, Nina Zupančič, Radmila Milačič, Janez Ščančar, 2023, izvirni znanstveni članek Povzetek: Fine particulate matter (PM2.5), a detrimental urban air pollutant primarily emitted by traffic and biomass burning, poses disproportionately significant health risks at relatively limited exposure during commuting. Previous studies have mainly focused on fixed locations when assessing PM2.5 exposure, while neglecting pedestrians and cyclists, who often experience higher pollution levels. In response, this research aimed to independently validate the effectiveness of bicycle-mounted low-cost sensors (LCS) adopted by citizens, evaluate temporal and spatial PM2.5 exposure, and assess associated health risks in Ljubljana, Slovenia. The LCS quality assurance results, verified by co-location field tests by air quality monitoring stations (AQMS), showed comparable outcomes with an average percentage difference of 21.29 %, attributed to humidity-induced nucleation effects. The colder months exhibited the highest air pollution levels (μ = 32.31 μg/m3) due to frequent thermal inversions and weak wind circulation, hindering vertical air mixing and the adequate dispersion of pollutants. Additionally, PM2.5 levels in all sampling periods were lowest in the afternoon (μ = 12.09 μg/m3) and highest during the night (μ = 61.00 μg/m3) when the planetary boundary layer thins, leading to the trapping of pollutants near the surface, thus significantly affecting diurnal and seasonal patterns. Analysis of exposure factors revealed that cyclists were approximately three times more exposed than pedestrians. However, the toxicological risk assessment indicated a minimal potential risk of PM2.5 exposure. The collaborative integration of data from official AQMS and LCS can enhance evidence-based policy-making processes and facilitates the realignment of effective regulatory frameworks to reduce urban air pollution.
Ključne besede: air pollution monitoring, PM2.5 exposure, citizen science, bicycle-mounted low-cost sensors
Objavljeno v DiRROS: 30.01.2024; Ogledov: 314; Prenosov: 116
Celotno besedilo (2,57 MB)
Gradivo ima več datotek! Več... |
1098. |
1099. |
1100. |
