1. Sliding wear behaviour of conventional and cryotreated PM Cr-V (Vanadis 6) ledeburitic tool steelVenu Yarasu, Peter Jurči, Peter Gogola, Bojan Podgornik, Marko Sedlaček, 2023, izvirni znanstveni članek Ključne besede: cold work tool steel, conventional treatment, cryogenic treatment, hardness, reciprocal sliding, wear
Objavljeno v DiRROS: 08.04.2024; Ogledov: 84; Prenosov: 18
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2. Characterization and Mechanical Properties of Sintered Clay MineralsSara Tominc, Vilma Ducman, Jakob Koenig, Srečo D. Škapin, Matjaž Spreitzer, 2024, objavljeni znanstveni prispevek na konferenci Povzetek: The need to reduce energy consumption and the carbon footprint generated by firing ceramics has stimulated research to develop sintering processes carried out at lower temperatures(ideally not above 300 °C) and high pressures (up to 600 MPa), the so-called cold sintering process (CSP) (Grasso et al., 2020, Maria et al., 2017). To evaluate the applicability of CSP to clays, we focused on two representative clay minerals, kaolinite and illite, and on the natural clay material obtained from a Slovenian brick manufacturer. The selected clay materials were characterized on the basis of mineralogical-chemical composition (XRD, XRF) and particle size distribution (SEM analysis, PSD, BET). The powders of clay minerals and natural clay material were first sintered in a heating microscope to determine the sintering conditions and then in a laboratory furnace at 1100 °C for 2 hours and additionally at 1300 °C for kaolinites. The effect of compression of the initial powders on their final properties was also investigated.
Ključne besede: conventional sintering, cold sintering, clay minerals, characterization, mechanical properties
Objavljeno v DiRROS: 29.03.2024; Ogledov: 102; Prenosov: 48
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3. The importance of educating younger generations about raw materials and their uses in our daily lifeKim Mezga, Petra Vrhovnik, Janja Žmavc, Lidia Gullon, 2021, izvirni znanstveni članek Povzetek: Raw materials are of great importance for humankind as they enable the development of technology, drive industry and economy, and overall the lifestyle we know today. The paper is addressing the topic of interactive learning about the mineral raw materials, i.e. metals and non-metals. Due to population growth and consequently in-creased global demand for raw materials, there is a need to educate younger generations about the raw materials and their properties and origin, so they would know from an early age where the mineral products they use come from and how purchase decisions affect the social environments of people who live in countries with resources exploitation.Todayʼs trends in mining are oriented towards more sustainable exploitation and management, taking into account the economic, social and environmental aspects. An example of such is exploitation of secondary raw materials from tail-ings and heaps. But in some countries, mining is stuck in the past, using obsolete technologies causing increased pol-lution and strongly present linear economy approaches of take-use-dispose attitudes or even unethical approaches, such as children being exploited as a cheap workforce, people being abducted, tortured and even killed over minerals (min-erals being exploited in such way are called blood or conflict minerals). Further, due to the potential negative impacts on health and safety, due to the emissions in air, water and surface disturbance, the public perception of mining is still perceived as negative in most cases. School curriculums most often lack description of current situations in the global mining. Therefore, within the EIT RawMaterials BRIEFCASE and 3D BRIEFCASE projects the project partners provide the comprehensive view of the issues of todayʼs mining and use of raw materials. The paper presents the description of both projects and the non-conventional teaching methods - the hands-on and digital tools for pupils and teachers, i.e. the briefcases, the "Briefcase of mineral applications" game, workshops and the supporting materials. The main objective of projects is to raise the pupils awareness about the utility and indispensability of minerals and mining and the consequences of their uses and production systems, which would increasein the long term the awareness about the social and environmental consequences of raw material production.
Ključne besede: raw materials, mining, pupils and students, non-conventional teaching tools, BRIEFCASE, 3D BRIEFCASE, curricular planning, EIT RawMaterials
Objavljeno v DiRROS: 04.12.2023; Ogledov: 208; Prenosov: 98
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4. Explore the briefcase - learning about raw materials through non-conventional teaching toolsKim Mezga, Petra Vrhovnik, Dragana Šolaja, Lidia Gullon, Alenka Mauko Pranjić, Ainara Garcia Uriarte, 2019, izvirni znanstveni članek Povzetek: We live in a material world where the markets are flooded with all kinds of products. At the same time, we are facing a population growth, as well as a product demand growth. But, are we aware of the raw materials needed for our favourite daily products? In which part of the world are they extracted? Do we recognize the value chains from the mine to the product? And, where do these products end up after we use them? Many school curriculums include this topic only briefly, thus there is a need to raise awareness among youngsters about mining and raw materials in general. EIT RawMaterials funded by the European Commission, is the largest community dealing with raw materials in Europe. One of its main objectives is to raise awareness among general public about the raw materials and their indispensability, about the consequences of their uses, about the mining and production systems as well as about the utilization and recycling. Innovative and attractive pathways are employed in the process. One of the projects bringing raw materials and mining closer to pupils is the BRIEFCASE project. Using non - conventional teaching methods, tools and guided workshops, the project provides pupils with a unique hands - on experience. It draws their attention to raw materials and their applications and helps pupils recognize minerals in products we use every day. Besides emphasizing the importance of minerals in our everyday life and addressing sensible issues like conflict minerals, the consequences of our purchase decisions, the sustainability of mining operations and their environmental implications are also presented.
Ključne besede: Project BRIEFCASE, minerals, raising awareness, non-conventional teaching tools, EIT RawMaterials, award
Objavljeno v DiRROS: 21.11.2023; Ogledov: 766; Prenosov: 138
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5. Isotope fingerprints of common and tartary buckwheat grains and milling fractions : a preliminary studyLovro Sinkovič, Nives Ogrinc, Doris Potočnik, Vladimir Meglič, izvirni znanstveni članek Ključne besede: hulls, semolina, isotopic signature, light flour, conventional, organic
Objavljeno v DiRROS: 06.09.2022; Ogledov: 447; Prenosov: 168
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6. Properties and aromatic profile of dry-fermented sausages produced from Krškopolje pigs reared under organic and conventional rearing regimeMartin Škrlep, Marjeta Čandek-Potokar, Urška Tomažin, Nina Batorek Lukač, Mónica Flores, 2018, izvirni znanstveni članek Ključne besede: meat product quality, pif meat, dry-fermented sausages, local breeds, organic rearing regime, conventional rearing regime, aromatic profile, sousages profile, meat flavour, prašiči, prašičje meso, kastracija prašičev, imunokastracija, operativna kastracija, kakovost mesa, vonj merjasca, androstenon, okus mesa
Objavljeno v DiRROS: 06.09.2022; Ogledov: 440; Prenosov: 0 |
7. Parameters for discrimination between organic and conventional production : a case study for chicory plants (Cichorium intybus L.)Lovro Sinkovič, Marijan Nečemer, Nives Ogrinc, Dragan Žnidarčič, David Stopar, Rajko Vidrih, Vladimir Meglič, 2020, izvirni znanstveni članek Ključne besede: Organic production, Conventional production, Chicory plant, Bioactive compounds, Fertility management, Isotopic signature, Multi-elemental profile, Nitrogen assimilation
Objavljeno v DiRROS: 11.05.2020; Ogledov: 2421; Prenosov: 925
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8. Pesticide and veterinary drug residues in honey - validation of methods and a survey of organic and conventional honeys from SloveniaHelena Baša Česnik, Veronika Kmecl, Špela Velikonja Bolta, 2019, izvirni znanstveni članek Ključne besede: honey, pesticides, veterinary drug, residues, conventional honey, organic honey, acaricides
Objavljeno v DiRROS: 17.04.2020; Ogledov: 2087; Prenosov: 1040
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