31. Arsenic in natural waters: hydrogeochemistry characterization and toxicity effectsDoroteja Gošar, 2018, master's thesis Abstract: Arsenic contamination in natural water is a worldwide problem and a major health concern. In master thesis hydrogeochemistry and toxicity effects of natural waters rich in arsenic were studied. The main objective of the master thesis was to evaluate As pollution of the Freixeda stream and groundwater in abandoned Freixeda gold mine area in NE Portugal near Mirandela city (41.413767 N 7.103562 W) and compare it with the data from previous studies. Further on, toxicological evaluation of selected water samples was performed in the in vitro system of human cell line Caco-2.
Chemical analyses of sampled water samples with use of different modelling sofware show that groundwater have higher sulphate and bicarbonate values than surface water, which could be the reason for As desorption and higher As values in groundwater. Water-rock interaction promotes reduction and dissolution of sulphide minerals and in reductive environments dissolution of secondary Fe minerals releases adsorbed As into solution.
Toxicological testing on human cells included cytotoxicity assay, genotoxicity assay and production of reactive oxigene species (ROS). Genotoxicity was only modestly affected by a short-term exposure to As-contaminated water samples, however, higher concentrations of As in real samples lead to higher level of oxidative stress and decreased cell viability. Exposure of cells to pure As(III) solution show clear concentration dependent decrease in cell metabolism and viability, strong genotoxicity and increased ROS generation.
Considering the worldwide extent of As contamination in natural waters and ability of intestinal epithelium to reduce the potential harmful effects of As, more studies evaluating the human intestinal permeability for As should be done in the future.
Keywords: Water quality, arsenic, hydrogeochemistry, toxicity, Caco-2 cell line
Published in RUNG: 26.09.2018; Views: 5473; Downloads: 197
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34. EIQAS, Enhancing Internal Quality Assurance Systems, Training Event 1, Publication on European Standards and Guidelines for Quality Assurance (Part 1 ESG) and Internal Quality Assurance (IQA) : Erasmus+ Project 2014-20162016, treatise, preliminary study, study Keywords: higher education, internal quality assurance, European Higher Education Area, standards and guidelines for quality assurance, university
Published in RUNG: 13.02.2018; Views: 4621; Downloads: 0
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37. University of Nova Gorica, Self-evaluation report : Institutional Evaluation Programme of the European University AssociationIztok Arčon, Egon Pavlica, Peter Purg, Ana Toroš, Veronika Piccinini, Martina Bergant Marušič, Ingrid Petrič, IMRE CIKAJLO, Lorena Butinar, Deni Drnovšček, treatise, preliminary study, study Keywords: quality assurance, higher education, university, european university association
Published in RUNG: 02.02.2018; Views: 4622; Downloads: 0
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39. Under All the Hats of Quality —- from a round table discussion among teachers, students, quality experts, policy makers…Peter Purg, Potokar Urša B., 2016, scientific film, scientific sound or video publication Abstract: This 54-minute full feature documentary and research film features, in a unique intermedia manner, the findings of a
round table, conceived and moderated by dr. pETER Purg; at the "Quality of University Teaching and Learning" international conference, Brdo pri Kranju in April 6, 2016. This video (directed and shot by P. Purg, and edited by Urša .B. Potokar) presents the issues emerging from a round table discussion among teachers, students, quality experts and policy makers from different disciplines and countries.
As a "mixed media publication", It links in with an academic article (to be) published after the conference by P. Purg, discussing the selected utterances as evidence of emerging topics in academic quality, set against a broader theoretical and policy-related argumentation. Such a mixed-media multi-layered interplay of theory and practice, between text and video, may prove that an open discussion, paired with (audio-visual) self-reflection can both articulate and confirm some crucial commitments for increasing the quality of teaching and learning.
The round-table participants mostly agreed academic quality is dependent on teaching and learning quality, while academic practice is moving towards student autonomy and agency. For that both the national and the institutional legislative framework should provide a suitable scaffolding, facilitating better progression through education stages and sustainable student-to-teacher ratios. Good contact with the employment sector remains a key challenge that affects education quality, confirming the need for a wider participation of all higher education stakeholders.
Keywords: quality, documentary, research, qualitative, higher education teaching
Published in RUNG: 07.07.2016; Views: 4486; Downloads: 0 |
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