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Povzetek: The interdependence between the economy and the environment is becoming a fact of increasing importance. Productive coastal areas have been recognised as one of the most valuable ecosystems from an ecological and socio-economic point of view. In this paper we focus on the massive presence of jellyfish in the northern Adriatic and their effect on the Slovenian economy. Our results indicate that high jellyfish abundance in 2004 resulted in a reduction of fish catch, value added, gross income, and employment in the fishing industry. Moreover, the government and the EU have acknowledged the impact of jellyfish on the fishing industry by allocating financial help to the fishermen involved. We attempted to assess other factors influencing the fishing industry but none were statistically significant. The input-output analysis has not revealed a significant impact on the entire Slovenian economy presumably due to the small contribution of the fishing industry to Slovenian GDP. Our work is a first attempt to relate ecological changes such as jellyfish outbreaks in the northern Adriatic to the wider economy and we suggest that such a methodology can be applied to other countries/regions and to other natural phenomena affecting the economy.
Ključne besede: morje, objavljeni prispevki na konferenci, morsko ribištvo, trajnostni razvoj, gospodarski aspekti, meduze, množično pojavljanje, distribucija, numerično modeliranje, klimatske spremembe, hipoteze, Pelagia noctiluca, Jadransko morje, gospodarske politike
Objavljeno v DiRROS: 26.03.2025; Ogledov: 183; Prenosov: 148
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Ključne besede: vzgoja in izobraževanje, predšolska vzgoja in izobraževanje, skupinska refleksija, profesionalni razvoj, reflektivne metode, profesionalna učeča se skupnost
Objavljeno v DiRROS: 27.01.2025; Ogledov: 228; Prenosov: 138
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Ključne besede: gibanje neuvrščenih, G-77, Konferenca Združenih narodov za trgovino in razvoj (UNCTAD), Jugoslavija, novi mednarodni ekonomski red
Objavljeno v DiRROS: 13.12.2024; Ogledov: 253; Prenosov: 139
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Povzetek: Raziskava prinaša nova spoznanja in izzive s področij ribištva v Sloveniji in z njim povezanih panog. Z intervjuji smo pridobili primarne podatke za raziskovanje, ki je vključevalo različne vidike in segmente ribiškega trga v Sloveniji, s poudarkom na socio-ekonomskih dejavnikih. Preučevali smo ribolov in vzrejo školjk ter rib v morju in v celinskih vodah, povezovanje ribištva s turizmom, predelavo ribiških izdelkov, zlorabe na ribiškem trgu in sorodne teme kakortudi možnosti za trajnostni razvoj ribištva v slovenskem morju in v celinskih vodah. Rezultati intervjujev so nam dali vpogled v vrsto težav in v možne rešitve, kot so jih predvideli različni deležniki, povezani s trgom rib. V zaključku raziskave so predstavljeni ugotovitve o trgu rib, možne smeri in vplivi na razvoj trga rib. Glede na ugotovljene težave smo podali tudi predloge, ki bi lahko izboljšali stanje v ribištvu in na trgu rib v Sloveniji. Raziskava je prinesla nekaj pomembnih ugotovitev, kot so: slovenski potrošniki pojedo mnogo manj rib v primerjavi z ostalimi članicami Evropske unije, slabo so ozaveščeni o ribolovnih izdelkih in ozaveščanje je preveč kratkoročno usmerjeno, da bi dosegli spremembe. V vseh dejavnostih, povezanih s trgom rib, je potrebno zmanjšati vplive na okolje, kar bo pomagalo ohranjati ribolovne vire v naravnih vodah.
Ključne besede: prehranska varnost, ribolov, ribogojstvo, akvakultura, trajnostni razvoj, zakonodaja, kvaliteta, trženje, razvojne perspektive, elektronske knjige
Objavljeno v DiRROS: 08.08.2024; Ogledov: 550; Prenosov: 333
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Povzetek: The surface properties of hydrocarbon polymers are inadequate for numerous applications. Hence, they require alteration via functionalisation with desired functional groups. Hydroxyl groups are often preferred, since they enable appropriate polarity for the irreversible grafting of desired molecules. In this study, the surface kinetics resulting from the treatment of polystyrene with hydroxyl (OH) radicals from the gas phase was fundamentally investigated through a precisely-designed experiment. Polystyrene samples were exposed to various known fluences of OH radicals, and the evolution of surface functional groups versus the OH fluence was monitored using high-resolution X-ray photoelectron spectroscopy (XPS). The fluences of OH radicals varied between 1 × 1018 and 4 × 1023 m−2 in the process of finding a threshold fluence for the formation of specific groups. The surface concentration of carbonyl (C=O) groups could be measured using XPS at a fluence of approximately 5 × 1020 m−2. The C=O groups became measurable at a fluence of approximately 1.5 × 1021 m−2, and carboxyl (COOH)/ester groups at approximately 4 × 1021 m−2. As deduced from the XPS, a concentration of C=O groups at approximately 5 % occurred before the degradation of the aromatic ring. The formation of other oxygen-functional groups required opening of the aromatic ring. The results have been explained using a two-step process, considering available theories vis-a-vis initial stages in the functionalisation of PS with polar functional groups.
Ključne besede: polistiren, kinetika površinske funkcionalizacije, OH radikali, vpliv doze radikalov, časovni razvoj, polystyrene, surface functionalisation kinetics, OH radicals
Objavljeno v DiRROS: 09.11.2023; Ogledov: 963; Prenosov: 339
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