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Abstract: Determination of food authenticity is an important issue in quality control and food safety. Recent studies predict a growing demand for natural and more authentic food and beverage products. The quality and authenticity of apple juice is also of a great economic importance since the popularity and demand for apple juice consumption has increased. The growth of the market for organically produced apples and apple juice is due to the increasing demand for healthy food requirements, protection of the environment and the promotion of biotic diversity. Organic foods have a higher nutritional and health value, but they are more expensive, because their production is more difficult and less profitable. In addition to how food is produced, consumers are increasingly placing emphasis on food products of specific region, which are known for their unique natural flavours and taste. The presented thesis is based on four separate but closely interrelated studies, in which a combination of different isotopic ratios of bioelements (2H/1H, 13C/12C, 15N/14N, 18O/16O), multi-element analysis, and major primary and secondary metabolite profiles were exploited to differentiate the geographical origin and agricultural production practice (organic vs integrated/conventional) of Slovenian apples. These parameters were used to establish the first database of authentic Slovenian apple juice, which can be used to verify the authenticity of commercially available apple juice in Slovenia. The first preliminary study was entitled “Organic Cultivation ~ Geographical Origin (OCGO)” and was performed using apples from the 2009 growing season. Its aim was to examine the use of stable isotope and multi-element data for determining the geographical origin and agricultural production practice of fresh apple juices. Fruits of six apple (Malus domestica Borkh) cultivars (Topaz, Idared, Golden Delicious, Goldrush, Gala, Gloster) were collected from four different geographical regions of Slovenia (Alpine, Dinaric, Pannonian and Mediterranean) grown under organic and integrated/conventional orchard management systems. The results revealed that stable isotope parameters in sugar, pulp and water were the most significant variables for differentiating between the regions. Good separation was achieved between the geographical regions in Slovenia based on the δ18O and δ2H values in water and Rb and S levels in the apple fruit juice. The most significant variables that distinguished between organically and integrated/conventionally cultivated apples were the 15N/14N ratio and antioxidant activity of the apple juice. Significant differences were also observed in the ascorbic acid content of the juice. Based on these results the number and types of apples and the minimum number of samples needed from the same region for determining geographical origin were determined. The second study was called “Organic ~ Conventional Apple Cultivation” (OCAC) and was performed in 2010 and 2011 in a Gala apple orchard. The aim was to determine the effect of different fertilizers allowed either in organic or conventional/integrated agricultural regimes on different parameters. Quality parameters, isotopic composition of C in sugars and in pulp together with N and elemental analysis were investigated. The following five fertilizers were applied: Biosol and Plantella organic (organic) and Ca cyanamide, KAN and UREA (mineral) at a rate of 60 and 120 kg of nitrogen per hectare. From the obtained data it was possible to differentiate between organic and integrated/conventional apple production when taking into account the following parameters: mass, skin and flesh firmness (SFF), total soluble solids (TSS), and the content of Cl as well as δ15N and δ13C in the pulp. The “Organic Cultivation ~ Geographical Origin” (OCGO) study, which took place during the 2011 and 2012 growing seasons included a greater number of samples and samples from five different geographical regions: Alpine, Dinaric,
Keywords: apple juice, geographical origin, agricultural production practice, biomarkers, phenol compounds, elements, stable isotopes, Slovenia
Published in RUNG: 07.06.2016; Views: 8038; Downloads: 895
Full text (3,97 MB)

Abstract: The motivation for this thesis was author’s experience as a traveling artists and questioning how experiences abroad influenced her artistic evolution. Nowadays, in the years of globalization and cross-border collaborations, it has become very common for artists to make international connections in order to seek inspiration, funds, connections, exhibition spaces, platforms on which to show their work, studios, workshops, and to establish an international career. The idea of this thesis is to explore the phenomena of traveling artists through literature and analysis of the author’s personal experience and development as an artist in order to identify whether travel is a good practice that should be advised for emerging (or established) artists in order to evolve in their careers. This thesis, “The Influence of a Change in Surroundings on Artistic Creativity,” questions how traveling influences artists and their creativity. It offers a historically overview of the subject and presents contemporary ways and opportunities for artists to travel and work in international environments. In the second part of this thesis, the author presents poetical videos, the “An Artist Abroad – Video Poetry Series,” which were made during the research and through which the author expresses her feelings and observation of her new surroundings. Very personal and poetic work shows the progress and development in the author’s artistic practice, and it shows how new surroundings influenced her creative and production processes.
Keywords: art, artist, artist abroad, artist residency, traveling artist, mobility, surroundings, change, creativity, influence, production, culture, global, contemporary art, video, poetry, series
Published in RUNG: 25.02.2016; Views: 6710; Downloads: 159
Full text (7,21 MB)
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