Iskanje po repozitoriju

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Opis: V tem diplomskem delu smo obravnavali proces validacije dveh analiznih metod za določanje kakovosti vina. In sicer smo določali organske kisline kot so vinska kislina, jabolčna kislina, mlečna kislina, citronska kislina, ocetna kislina, in monosaharide glukozo in fruktozo. Analiza teh parametrov je pomembna pri nadzoru procesa pridelave vina kot tudi spremljanju kakovosti vina. V diplomski nalogi smo pregledali glavne metode za določanje kislin in sladkorjev v grozdju in vinu, v samem poskusu pa smo uporabili kromatografsko tehniko na osnovi tekočinske kromatografijo visoke ločljivosti v kombinaciji z detekcijo v ultravijoličnem (UV) za organske kisline in z detekcijo lomnega količnika (RID) za monosaharidne sladkorje. HPLC-UV/RID sistem omogoča enostavno pripravo vzorca na analizo (samo filtracija, mogoče redčitev, če je potrebna), hitro analizo in omogoča zadovoljive meje detekcije za potrebe določevanja omenjenih parametrov. Obe metodi smo opisali z različnimi parametri, kot je ponovljivost, linearnost, izkoristek v štirih različnih matriksih (dve beli vini, eno rdeče in eno jabolčno vino – cider), meja detekcije in meja kvantifikacije. Rezultate kvantifikacije skupnih sladkorjev in organskih kislin v vzorcih vin smo primerjali z rezultati akreditiranega laboratorija kjer je bilo to mogoče in ugotovili, da kvantifikacija z metodo standardnega dodatka omogoča primerljive rezultate z akreditiranim laboratorijem, predvsem za parameter skupni fermentirani sladkorji (glukoza in fruktoza). Vsebnost skupnih kislin določenih kromatografsko je bila nekoliko manjša od parametra skupne titrabilne kisline, kar je najverjetneje posledica manjšega števila posameznih kislin, ki smo jih vključili v ta parameter, pa tudi drugačne metode določanja kislin.
Ključne besede: vino, cider, HPLC, UV, RID, organske kisline, sladkorji, validacija
Objavljeno: 02.08.2022; Ogledov: 72; Prenosov: 3
Polno besedilo (1,10 MB)

Opis: Methodologically, the article comes from geocriticism, the field of comparative literature. The research focus is on poetry about Trieste in the 20th century, on the analysis of the poetic discourse about Trieste which reflects different historical interpretations of the Trieste region through the poetic representation of Trieste. Thus, the article analyzes the literarization of Trieste by poets from the Slovenian Trieste community, poets from the Italian community, and authors from the Istrian Trieste community, taking into account the multifocalization of views on a specific reference space. Based on the corresponding corpus of poems, we have captured the intersection of the poems in the representations and feelings of the decaying and disintegrating Trieste after the Second World War. At the same time, we identified different representations of the city over time: Trieste as a Roman city; Trieste as an Italian city; Trieste as a symbol of pain; Trieste as a symbol of alienation.
Ključne besede: Slovenian poetry, Italian poetry, Trieste, Istra, geocriticism
Objavljeno: 29.07.2022; Ogledov: 111; Prenosov: 0
Polno besedilo (1,47 MB)

Ključne besede: language disorders, psycholinguistics, aphasia
Objavljeno: 29.07.2022; Ogledov: 113; Prenosov: 0
Polno besedilo (421,34 KB)

Ključne besede: Psycholinguistics, language, cognition
Objavljeno: 29.07.2022; Ogledov: 113; Prenosov: 0
Polno besedilo (421,55 KB)

Opis: Aerosol direct radiative forcing is strongly dependent on aerosol distributions and aerosol types. A detailed understanding of such information is still missing at the Alpine region, which currently undergoes amplified climate warming. Our goal was to study the vertical variability of aerosol types within and above the Vipava valley (45.87◦ N, 13.90◦ E, 125 m a.s.l.) to reveal the vertical impact of each particular aerosol type on this region, a representative complex terrain in the Alpine region which often suffers from air pollution in the wintertime. This investigation was performed using the entire dataset of a dual-wavelength polarization Raman lidar system, which covers 33 nights from September to December 2017. The lidar provides measurements from midnight to early morning (typically from 00:00 to 06:00 CET) to provide aerosol-type dependent properties, which include particle linear depolarization ratio, lidar ratio at 355 nm and the aerosol backscatter Ångström exponent between 355 nm and 1064 nm. These aerosol properties were compared with similar studies, and the aerosol types were identified by the measured aerosol optical properties. Primary anthropogenic aerosols within the valley are mainly emitted from two sources: individual domestic heating systems, which mostly use biomass fuel, and traffic emissions. Natural aerosols, such as mineral dust and sea salt, are mostly transported over large distances. A mixture of two or more aerosol types was generally found. The aerosol characterization and statistical properties of vertical aerosol distributions were performed up to 3 km.
Ključne besede: valley air pollution, aerosol vertical distributions, lidar remote sensing, aerosol identification
Objavljeno: 21.07.2022; Ogledov: 168; Prenosov: 3
Polno besedilo (5,57 MB)