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Abstract: New and emerging Phytophthora-related diseases in small trees, shrubs and herbaceous plants typical of subalpine vegetation have recently been observed in Italy and Slovenia. Diseased plants showed a complex symptomatology including foliar necrosis, fruit rot, shoot blight and branch bleeding cankers. Since little information is available about the aetiology of these aerial Phytophthora diseases, from 2019 to 2022, field surveys were conducted in 54 sites to define the occurrence, distribution and impact of the Phytophthora species on mountain vegetation. A total of 360 Phytophthora isolates were obtained from 397 samples collected from 33 herbaceous and woody host species. Based on phylogenetic analysis and morphometric data, 17 Phytophthora species were identified: P. pseudosyringae (201 isolates), P. plurivora (54), P. gonapodyides (21), P. ilicis (20), P. alpina (17), P. acerina (11), P. cactorum (7), P. pseudocryptogea (6), P. cambivora (5), P. idaei (4), P. psychrophila (3), P. bilorbang (2), P. chlamydospora (2), P. hedraiandra (1), P. kelmanii (1), P. rosacearum (1) and P. syringae (1). In addition, three isolates of a new putative Phytophthora species obtained from Alnus viridis, Juniperus communis and Rhododendron ferrugineum are described here as Phytophthora pseudogregata sp. nov. Overall, the results highlighted an unexpectedly high diversity of Phytophthora species in mountain areas, with many species able to cause aerial infections due to the production of caducous sporangia.
Keywords: alpine regions, emerging disease, oomycetes, foliar necrosis, ITS clade 6, phylogeny
Published in DiRROS: 01.08.2023; Views: 368; Downloads: 256
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Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov
Published in DiRROS: 28.07.2023; Views: 287; Downloads: 0

Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, Juglans
Published in DiRROS: 28.07.2023; Views: 306; 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: 326; Downloads: 243
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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: 326; Downloads: 96
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