Iskanje po repozitoriju

A+ | A- | | SLO | ENG

Opis: Zbirka podatkov in fotografij Aleksandrinke je nastala v okviru projekta programske sheme “Projektno delo z negospodarskim in neprofitnim sektorjem – Študentski inovativni projekti za družbeno korist 2016–2018”. V interdisciplinarnem projektu so študenti in študentke ustvarili_e spletno stran s podatkovno zbirko o aleksandrinkah, vanjo so vpisali_e podatke o aleksandrinkah, ki jih je pridobilo Društvo za ohranjanje kulturne dediščine aleksandrink. Fotografirali_e so predmete, ki so pripadali aleksandrinkam, in digitalizirali_e del zbirke fotografij, ki jih hrani Društvo za ohranjanje kulturne dediščine aleksandrink.
Najdeno v: osebi
Ključne besede: aleksandrinke
Objavljeno: 08.01.2019; Ogledov: 2446; Prenosov: 0

Opis: Dry reforming of methane (DRM) is a promising way to convert methane and carbon dioxide into H2 and CO (syngas). CeO2 nanorods, nanocubes, and nanospheres were decorated with 1−4 wt % Ni. The materials were structurally characterized using TEM and in situ XANES/EXAFS. The CO2 activation was analyzed by DFT and temperature-programmed techniques combined with MS-DRIFTS. Synthesized CeO2 morphologies expose {111} and {100} terminating facets, varying the strength of the CO2 interaction and redox properties, which influence the CO2 activation. Temperature-programmed CO2 DRIFTS analysis revealed that under hydrogen-lean conditions mono- and bidentate carbonates are hydrogenated to formate intermediates, which decompose to H2O and CO. In excess hydrogen, methane is the preferred reaction product. The CeO2 cubes favor the formation of a polydentate carbonate species, which is an inert spectator during DRM at 500 °C. Polydentate covers a considerable fraction of ceria’s surface, resulting in less-abundant surface sites for CO2 dissociation
Najdeno v: osebi
Ključne besede: surface carbonates, in situ characterization, Ni XANES, Ni EXAFS, spectator species, CeO2 nanoshapes, CO2 activation
Objavljeno: 13.07.2022; Ogledov: 522; Prenosov: 0
Polno besedilo (9,50 MB)

Opis: Air pollution is not an exclusively urban problem as wood burning is a widespread practice in rural areas. As we lack information on the air quality situation in rural mountainous regions, our aim is to examine equivalent black carbon (eBC) pollution in a typical rural karst area in the settlement of Loški Potok (Slovenia). eBC mass concentrations were measured by Aethalometer (AE-33) at two sites in Retje karst depression. The rural village station was located at the bottom of the karst depression whereas the rural background station was positioned at the top of the hill. We showthe diurnal variation of equivalent black carbon mass concentrations for different seasons. In the populated karst depression, the major source of eBC pollution are households using wood as a heating fuel reaching the highest mass concentrations in winter. Diurnal pattern of eBC from biomass burning and traffic differ due to different source activity and it is influenced by typical formation of a cold air pool from late afternoon until late morning, restricting the dispersion of local emissions. The large difference in mass concentrations between the lowest part of the village (rural station) and the top of the hill (rural background station) indicates that in a vertically stratified and stable atmosphere local sources of black carbon have a major impact onair quality conditions in the area studied. Since in Alpine and Dinaric regions there are many similar inhabited areas, we can expect similar air quality conditions also in other rural hilly areas with limited self-cleaning air capacity.
Najdeno v: osebi
Ključne besede: air pollution, black carbon, hidden geographies, diurnal variation, biomass burning, relief depressions, Loški Potok, Slovenia
Objavljeno: 04.01.2021; Ogledov: 1494; Prenosov: 0
Polno besedilo (1,15 MB)

Opis: Vinski turizem je hitro rastoča ekonomska panoga, ki bi jo glede na geografske danosti slovenske regije in kakovost pridelanega vina bilo vredno ne samo izkoristiti, temveč tudi poglobiti. V diplomski nalogi predstavljamo in preučujemo vinarstvo ter vinogradništvo v povezavi s turizmom v Sloveniji, s poudarkom na okolišu slovenska Istra. Pod drobnogled vzamemo konzorcij Vin Istre in društvo Vinol, kjer izpostavljamo tako dobre prakse, kakor pomankljivosti. Osredotočimo se na vinske festivale, njihov pomen, s poudarkom na festival maceriranih belih vin Orange Wine Festival Izola. Dotaknemo se tudi svetovnih trendov vinske panoge ter kakšen je bil vpliv pandemije Covid-19 na vinski turizem. V diplomski nalogi predstavljamo podjetje Vina Zaro, njegove začetke in možnosti razvoja za prihodnost. Rdeča nit diplomske naloge je iskanje že delujočih dobrih praks in trendov, ki bodo pripomogle k spremembi odnosa do vinskega turizma in odkrivanju novih aktivnosti za razvoj le-tega. Zavedamo se potrebe po mednarodnosti in zgledovanju po tujih uveljavljenih praksah, vendar prepoznamo jedro razvoja tudi v odnosu do mednarodnih potrošnikov, v lokalnih sortah grozdja, reinterpretaciji tradicionalnih pridelovalnih tehnikah, vrednotenju lastne kulturne dediščine, razširitvi ekološke pridelave in spodbujanju interakcije med različni turističnimi panogami.
Najdeno v: osebi
Ključne besede: diplomske naloge, vinski turizem, slovenska Istra, vinski festivali, blagovne znamke, Slovenija, vinarstvo Zaro, udomačene sorte
Objavljeno: 07.10.2021; Ogledov: 1236; Prenosov: 108
Polno besedilo (0,00 KB)
Gradivo ima več datotek! Več...

Opis: Residential wood combustion is a widespread practice in Europe with a serious impact on air quality, especially in mountainous areas. While there is a significant number of studies conducted in deep urbanized valleys and basins, little is known about the air pollution processes in rural shallow hollows, where around 30 % of the people in mountainous areas across Europe live. We aim to determine the influence of ground temperature inversions on wood combustion aerosol pollution in hilly, rural areas. The study uses Retje karst hollow (Loški Potok, Slovenia) as a representative site for mountainous and hilly rural areas in central and south-eastern Europe with residential wood combustion. Sampling with a mobile monitoring platform along the hollow was performed in December 2017 and January 2018. The backpack mobile monitoring platform was used for the determination of equivalent black carbon (eBC) and particulate matter (PM) mass concentrations along the hollow. To ensure high quality of mobile measurement data, intercomparisons of mobile instruments with reference instruments were performed at two air quality stations during every run. Our study showed that aerosol pollution events in the relief depression were associated with high local emission intensities originating almost entirely from residential wood burning and shallow temperature inversions (58 m on average). The eBC and PM mass concentrations showed stronger associations with the potential temperature gradient (R2=0.8) than with any other meteorological parameters taken into account (ambient temperature, relative humidity, wind speed, wind direction, and precipitation). The strong association between the potential temperature gradient and pollutant concentrations suggests that even a small number of emission sources (total 243 households in the studied hollow) in similar hilly and mountainous rural areas with frequent temperature inversions can significantly increase the levels of eBC and PM and deteriorate local air quality. During temperature inversions the measured mean eBC and PM2.5 mass concentrations in the whole hollow were as high as 4.5±2.6 and 48.0 ± 27.7 µg m−3, respectively, which is comparable to larger European urban centres.
Najdeno v: osebi
Ključne besede: air pollution, black carbon, sources, temperature inversion, mountainous area
Objavljeno: 03.05.2022; Ogledov: 533; Prenosov: 0
Polno besedilo (7,11 MB)