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Determination of organochlorine pesticides adsorbed on plastic pellets
2015, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: In the past years, several studies have revealed the presence of organic contaminants at concentrations from sub ng g–1 to mg g–1 on/in plastic pellets found in coastal environment worldwide [1,2,3]. Plastic pellets are actually industrial raw material, typically in the shape of small granules with a diameter of a few mm. They are categorized as microplastics (< 5 mm). They can be unintentionally lost in the environment during manufacturing and transport. They can subsequently reach the marine and coastal compartments. Due to their environmental persistence, they are widely distributed in the oceans and on beaches [1]. Organic pollutants associated to pellets are either additives (e.g. PBDEs) that are incorporated into plastics during production processes or hydrophobic chemicals (e.g. PCBs, organochlorine pesticides) which adsorb from the surrounding environment (e.g. seawater). Among these chemicals, some are recognized as POPs (Persistent Organic Pollutants) because of their persistence, bioaccumulation and potential adverse environmental and health effects. Thus, in order to better assess the impact of plastic pellets in coastal environment, it is necessary to determine the level of associated organic pollutants. The present study was carried out in the frame of DeFishGear project, which focuses on marine litter and microplastics issues in Adriatic region. This investigation aimed at developing an experimental protocol allowing the quantification of 11 organochlorine pesticides. Plastic pellets, sampled on beaches located in the Adriatic region, were first sorted by colour. Pesticides were extracted from the plastic matrix (c.a. 0.5 g) in a pressurized fluid extractor (50°C, 100 bar). Prior to evaporation, the extract was cleaned on Florisil sorbent through solid-phase extraction (SPE). The concentrated extracts were quantified on gas chromatography equipped with a micro electron capture detector (GC-μECD). Preliminary results revealed the presence of DDT transformation products.
Najdeno v: ključnih besedah
Povzetek najdenega: ...on marine litter and microplastics issues in Adriatic region. This investigation aimed at developing an experimental protocol...
Ključne besede: organochlorine pesticides, microplastics, pellets, Adriatic region
Objavljeno: 15.02.2016; Ogledov: 3428; Prenosov: 0
.pdf Polno besedilo (3,92 MB)

Creating a high-resolution picture of Cygnus with the Cherenkov Telescope Array
Marko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, Amanda Weinstein, 2015, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...elescope Array (CTA), very-high energy (VHE) gamma-ray emission, star-forming regions, the Cygnus region, observational strategy optimization...
Ključne besede: Cherenkov Telescope Array (CTA), very-high energy (VHE) gamma-ray emission, star-forming regions, the Cygnus region, observational strategy optimization
Objavljeno: 11.03.2016; Ogledov: 3505; Prenosov: 228
.pdf Polno besedilo (585,14 KB)

Bottom-up modelling of continuous renovation and energy balance of existing building stock: case study Kočevje
Marjana Šijanec Zavrl, Gašper Stegnar, Andraž Rakušček, Henrik Gjerkeš, 2016, objavljeni znanstveni prispevek na konferenci

Opis: A dynamic bottom-up model of the building stock is developed and implemented in a case study of Kočevje urban region. In the model, national register of real estate is cross-linked to data from other registers, e.g. the energy performance certificates (EPC) and the subsidized energy renovation measures. Regular updates of the data in registers enable continual improvement of the model. Therenovation potential is determined with respect to the age of building components after the last renovation, while the energy performance of the building stock is based either on the EPC for a particular building if available or on the energy indicators of corresponding building type from IEE EPISCOPE building typology and IEE RePublic_ZEB. Thus, the bottom-up model of the building stock (BuilS) enable a profound overview of the total heat demand, final energy use and CO2 emissions of the entire stock. In the case study Kočevje, various strategies for improving the buildings towards more sustainable ones are presented with projections to 2030. The strategies, reference and intensive renovation scenario, are compared with more ambitious strategy that the municipality is looking towards in the frame of Covenant of Mayors commitment. The bottom-up model was validated against the metered energy use of buildings connected to district heating. In the case study the model shows how the implementation of various strategies lead to different impacts and how the ambitious municipal plans are going to produce independence from fossil fuels by fostering the use of wood biomass as a locally available sustainable energy supply. The Kočevje case study analysis demonstrates, at the local level how a concept of increasing renewable energy sources utilisation and building energy efficiency stimulated by progressive measures can respond to low carbon society and sustainable energy selfsupply challenges.
Najdeno v: ključnih besedah
Povzetek najdenega: a case study of Kočevje urban region. In the model, national register of real...
Ključne besede: modelling, renovation scenarios, building stock, region policies
Objavljeno: 12.04.2016; Ogledov: 3666; Prenosov: 0
.pdf Polno besedilo (19,51 MB)

Evidence for a mixed mass composition at the ‘ankle’ in the cosmic-ray spectrum
Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, A. Aab, 2016, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ...spectrum, Pierre Auger Observatory, composition studies at the ‘ankle’ region in the UHECR spectrum...
Ključne besede: ultra-high energy cosmic rays (UHECR), UHECR mass composition, UHECR energy spectrum, Pierre Auger Observatory, composition studies at the ‘ankle’ region in the UHECR spectrum
Objavljeno: 25.11.2016; Ogledov: 3523; Prenosov: 155
.pdf Polno besedilo (1,73 MB)

Geotourism in Arcos-Pains Karst Region, Minas Gerais, Brazil
Mariana Barbosa Timo, 2021, doktorska disertacija

Opis: Knowing the geological evolution of Earth surface allows identifying various natural attractions (biotic and abiotic). It makes possible the use of the most differentiated resources for the practice of tourism. The Arcos-Pains Karst Region has excellent potential for geotourism use. Examples of geosites include the Santuario and Brega Caves, the Dry Valley in the Corumbá region, and the Mastodonte Cave, where fossils of the Haplomastodon waringi mastodon species were found. However, public investment policies aiming at the environmental preservation of this heritage are still minimal or absent. The region also suffers tremendous anthropic pressure due to the extraction and processing of limestone, agribusiness, urban expansion and informal tourism. The process of inventorying and quantifying geosites is an essential tool for defining geoconservation strategies since it is not possible to protect all the geodiversity of the planet. The attributes analysed should integrate several criteria that take into account the intrinsic characteristics of each geosite, its potential use and the level of protection required. Regarding this research, the objective is approaching karst and speleological heritage, intending to define geosites for scientific, educational and tourist use at the Arcos-Pains Karst Region. The purpose of the inventory is to develop a geotourism project that provides essential information for better territorial management. It is also intended to assist environmental agencies in the enterprises’ environmental licensing processes installed in the region. Among the thirty-five (35) sites evaluated, eleven (11) presented above-average use-values in all categories analysed. Also, they presented national relevance and were classified as geosites. In addition to these, another sixteen (16) sites scored sufficiently to be categorised with national relevance. Within the geosites, one (1) was of international relevance: the São Francisco River Canyon. Considering the results, it is essential to deepen the research regarding karst dynamics to equalise geodiversity preservation while allowing its use to benefit society.
Najdeno v: ključnih besedah
Ključne besede: Geodiversity, Geotourism, Geosites, Arcos-Pains Karst Region, Karst, Speleology
Objavljeno: 22.10.2021; Ogledov: 797; Prenosov: 67
URL Polno besedilo (0,00 KB)
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