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Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, Juglans
Published in DiRROS: 28.07.2023; Views: 274; Downloads: 0

Abstract: The influence of different amounts of gypsum on the hydration of a belite-rich and a yeʼelimite-rich belite-calcium sulfoaluminate clinker (BCSA) was investigated. The hydration kinetics, phase assemblages and compressive strength development of cements prepared using yeʼelimite/ calcium sulfate molar ratios of 1, 1.5 and 2 were studied. Besides ettringite and monosulfate, aluminium hydroxide, strätlingite, C-S-H, iron-containing siliceous hydrogarnet and hydrotalcite were present as hydration products. Increasing the amount of gypsum increased the ratio of ettringite to monosulfate formed in the cement paste, lowered the amount of pore solution, delayed the dissolution of belite and ferrite, decreased the formation of strätlingite and, in the case of the yeʼelimite-rich BCSA, led to an increase in compressive strength. Increased amounts of belite in the clinker led to the formation of higher quantities of C-S-H, at the expense of straätlingite and a lower compressive strength, as belite has a lower degree of reaction than yeʼelimite and due to the formation of more C-S-H and stratlingite compared to the more space-filling ettringite. The thermodynamic model established for BCSA cement hydration agrees well with the experimental data. Compressive strength directly correlated with bound water from thermogravimetric analyses and inversely correlated with the porosity calculated from thermodynamic modelling.
Keywords: belite-calcium sulfoaluminate cement, gypsum, hydration, thermodynamic modelling
Published in DiRROS: 28.07.2023; Views: 298; Downloads: 230
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Abstract: Zagotovitev kakovosti v zdravstvu postaja pomembnejša dejavnost plačnikov in ponudnikov zdravstvenih storitev, prav tako mednarodne organizacije uspešno akreditacijo pogojujejo z izvajanjem programov nadzora kakovosti. Za analizo pomanjkljivosti v zagotavljanju storitev se uporabljajo kazalniki kakovosti, ki analizirajo strukture, procese in izide v zdravstvenem sistemu in s tem omogočijo načrtovanje in izvedbo izboljšav zdravstvenih storitev. V radioterapiji je tradicija nadzora kakovosti, ki se razvija vzporedno s tehnološkimi in metodološkimi spremembami na tem področju. Pri analizi izidov zdravljenja, ki so najbolj poveden kazalnik kakovosti onkoloških zdravstvenih storitev, se velikokrat srečujemo z nezanesljivostjo podatkov oz. zapletenim dostopom do njih, kar zmanjšuje ažurnost in verodostojnost rezultatov.
Keywords: zdravstveni sistem, zdravstvene storitve, radioterapija
Published in DiRROS: 27.07.2023; Views: 277; Downloads: 88
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Keywords: etiologija, komplikacije, recidiv, bolniki, psihološka pomoč
Published in DiRROS: 24.07.2023; Views: 328; Downloads: 88
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Abstract: Non-native pests, climate change, and their interactions are likely to alter relationships between trees and tree-associated organisms with consequences for forest health. To understand and predict such changes, factors structuring tree-associated communities need to be determined. Here, we analysed the data consisting of records of insects and fungi collected from dormant twigs from 155 tree species at 51 botanical gardens or arboreta in 32 countries. Generalized dissimilarity models revealed similar relative importance of studied climatic, host-related and geographic factors on differences in tree-associated communities. Mean annual temperature, phylogenetic distance between hosts and geographic distance between locations were the major drivers of dissimilarities. The increasing importance of high temperatures on differences in studied communities indicate that climate change could affect tree-associated organisms directly and indirectly through host range shifts. Insect and fungal communities were more similar between closely related vs. distant hosts suggesting that host range shifts may facilitate the emergence of new pests. Moreover, dissimilarities among tree-associated communities increased with geographic distance indicating that human-mediated transport may serve as a pathway of the introductions of new pests. The results of this study highlight the need to limit the establishment of tree pests and increase the resilience of forest ecosystems to changes in climate.
Keywords: mycology, insects, fungus, community of organisms, influence of the host, influence of climate, influence of geography
Published in DiRROS: 19.07.2023; Views: 366; Downloads: 208
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