Iskanje po repozitoriju

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Povzetek: Raziskava obravnava smrekove gozdove, ki so pod neposrednim emisijskim vplivom termoelektrarne Šoštanj, in sicer tiste predele, kjer je bila povprečna osutost krošenj v letu 1988 od 26% - 60%. V 15 naključno izbranih ploskvah je povprečna osutost krošenj v letu 1994 ocenjena z 19,3% do 37,0%. Zaradi osutosti krošenj so zmanjšani širina branike, temeljnični prirastek in lesna proizvodnja. Tekoči volumenski prirastek se je zaradi osutosti krošenj vobdobju 1989 - 1993 zmanjšal za 11%, v obdobju 1984 - 1988 pa za 19%
Ključne besede: tekoči volumenski prirastek, propadanje gozdov, onesnaženost ozračja
Objavljeno v DiRROS: 23.08.2023; Ogledov: 346; Prenosov: 95
Celotno besedilo (5,27 MB)

Povzetek: Full and partial restorations in dentistry must replicate the characteristics of the patient’s natural teeth. Materials must have good mechanical properties and be non-toxic and biocompatible. Microbes, which can form biofilms, are constantly in contact with restorations. In this study, we investigate how well Candida albicans adheres to a polymethyl methacrylate (PMMA) resin base with gold (Au) nanoparticles. We synthesized Au nanoparticles and characterized them. The average size of Au nanoparticles embedded in PMMA was 11 nm. The color difference ∆E between PMMA and PMMA/Au composites was 2.7 and was still esthetically acceptable to patients. PMMA/Au surfaces are rougher and more hydrophilic than pure PMMA surfaces, and the isoelectric point of both types of surfaces was 4.3. Above the isoelectric point, PMMA/Au surfaces are more negatively charged than PMMA surfaces. The added Au nanoparticles decreased the tensile strength, while the hardness did not change significantly. Adhesion measurements showed that PMMA surfaces modified with Au nanoparticles reduced the extent of microbial adhesion of Candida albicans.
Ključne besede: fungal adhesión, C. albicans, polymethyl methacrylate resin, Au, surface properties, composites
Objavljeno v DiRROS: 24.07.2023; Ogledov: 346; Prenosov: 137
Celotno besedilo (2,90 MB)
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Ključne besede: oat, cultivation practice, yield, energy dispersive X-ray fluorescence (EDXRF), elements, isotopic signature
Objavljeno v DiRROS: 06.09.2022; Ogledov: 535; Prenosov: 208
Celotno besedilo (4,17 MB)

Povzetek: It has been supposed that the Brežice Sava River Terrace (BSRT) is tectonically disturbed near the town of Brežice and tilted to the north. To confirm this tectonically induced tilt in a quantitative sense, low-frequency Ground Penetration Radar (GPR) was applied. A total of eight GPR profiles were recorded across the BSRT providing information of the lower boundary of the terrace, which consists of loose to poorly cemented Quaternary gravel, while its Tertiary basement consists of poorly cemented carbonaceous silt (marl). The premise of the study was the assumption that this lithological boundary could be detected by the GPR method. In addition to the upper surface of the BSRT being tilted to the north by 0.18°, GPR profiles also showed a 0.04° difference in the tilt between the upper surface of the terrace and its lower boundary with the basement, which we assigned to the sin-sedimentary tilt. Upon this information, a cumulative tectonically induced dip of the BSRT lower boundary was defined at 0.22°.
Ključne besede: Brežice Sava River terrace, Krško basin, ground penetrating radar, tectonic tilt, seismic reflection profiling
Objavljeno v DiRROS: 06.01.2021; Ogledov: 1384; Prenosov: 643
Celotno besedilo (4,88 MB)

Ključne besede: varstvo gozdov, Picea abies, poškodbe iglic, gosenice, smrekov zavijač, Epinotia tedella, lokalna namnožitev, Slovenija
Objavljeno v DiRROS: 28.07.2020; Ogledov: 1451; Prenosov: 882
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