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41.
Capabilities of hydrogen-producing green algae Clamydomonas reinhardtii for copper bioremediation in wastewaters
Urška Žvab, Danijel Stojković, Matjaž Valant, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: copper, hydrogen, wastewater, green algae, Clamydomonas reinhardtii
Objavljeno: 19.12.2019; Ogledov: 177; Prenosov: 0
.pdf Polno besedilo (18,68 MB)

42.
v-P[sub]2O[sub]5 "micro-clusters" in P-doped silica studied by a first principles Raman investigation
Luigi Giacomazzi, Layla Martin-Samos, Matjaž Valant, Nicolas Richard, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: r-POHC, silica, Raman, first-principles
Objavljeno: 19.12.2019; Ogledov: 163; Prenosov: 0
.pdf Polno besedilo (18,68 MB)

43.
Interfacial reaction, morphology and growth mode of metals on topological insulator surfaces
Sandra Gardonio, Mattia Fanetti, Katja Ferfolja, Matjaž Valant, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: topological insulators, surfaces, metals
Objavljeno: 19.12.2019; Ogledov: 172; Prenosov: 0
.pdf Polno besedilo (18,68 MB)

44.
Determination of total ChE and AChE activity in human serum by FIA-TLS
Andrej Jerkič, Tjaša Birsa, Dorota Korte Kobylinska, Martina Bergant Marušič, Mladen Franko, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: acetylcholinesterase, FIA-TLS, butyrilcholinesterase
Objavljeno: 19.12.2019; Ogledov: 185; Prenosov: 0
.pdf Polno besedilo (18,68 MB)

45.
Looking for a topological insulator in the tetradymite family
Matjaž Valant, Paolo Moras, P. M. Sheverdyaeva, Mattia Fanetti, Zipporah Rini Benher, Sandra Gardonio, 2019, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Materials that are topological insulators (TI) manifest a novel state for their electrons. They possess topological surface states that are not destroyed by the presence of non-magnetic impurities on their surfaces. This unique property lies in the bulk band structure and it is typically found in narrow gap semiconductor with strong spin-orbit coupling. Bi2Se3 and Bi2Te3 belong to the class of compounds called tetradymites and are considered as the 3D-prototypical TI materials. However, these compounds are not usually insulators but have metallic bulk conductivity as a consequence of intrinsic defect doping: vacancies and anti-site defects. For these reasons, it is difficult to electrically gate these materials for the manipulation and control of charge carriers for realizing devices. This led to the search for other topological materials, which might have better insulating behavior in their bulk. Theoretical studies have pointed out that ternary variants of the Bi2Se3 and Bi2Te3, such as Bi2Te2Se, Bi2Te2S, Bi2Se2S Sb2Te2Se and Sb2Te2S, should be stable TIs and potentially offer a chemical way to control TI behavior, in particular by lowering native doping. Among the cited ternary compounds, Bi2Se2S should manifest a genuine topological spin-transport regime hosting an isolated Dirac cone with the Dirac point in the gap as well. However, it has been poorly studied from the TI experimental perspective. Therefore, to uncover the full potential of the predicted topological electronic properties of the Bi-Se-S system, in this presentation we will revisit the crystallographic and electronic structure of Bi2Se3-Bi2S3 solid solutions. The combined use of bulk and surface sensitive techniques such as X-ray diffraction (XRD), low energy electron diffraction (LEED), scanning electron microscopy (SEM) with Energy Dispersive X-ray spectroscopy (EDX) and X-ray photoemission spectroscopy (XPS) was applied to analyze single crystal samples grown by us. The quality of the single crystals was suitable for rigorous measurement of the electronic properties by means of Angle Resolved Photoemission Spectroscopy. We unambiguously showed that within a certain solid solution range, the single crystals of Bi-Se-S have a rombohedral structure with the topological surface states as theoretically predicted.
Ključne besede: topological insulators, ternary tetradymite, electronic properties.
Objavljeno: 19.12.2019; Ogledov: 174; Prenosov: 0
.pdf Polno besedilo (6,45 MB)

46.
Trajnostni potencial sončnih elektrarn v Sloveniji
Nejc Blažek, 2019, magistrsko delo

Opis: Proizvodnja električne energije s sončnimi elektrarnami v svetu in tudi v Sloveniji strmo narašča. Večina Slovencev ima do tovrstnega načina pridobivanja električne energije pozitiven odnos, k čemur je močno pripomogla Uredba o samooskrbi z električno energijo iz obnovljivih virov energije. Število novih sončnih elektrarn se bo povečevalo, s tem pa se bo v prihodnje povečevalo število izrabljenih solarnih panelov, ki jih sestavljajo silicijeve sončne celice. Z recikliranjem izrabljenih silicijevih sončnih celic lahko pridobimo do 85 % silicija oziroma 80 % sončnih celic za ponovno uporabo. Pri recikliranju tankoslojnih sončnih celic lahko vrnemo v proizvodni proces do 95 % polprevodnih materialov in do 90 % stekla. V povzetku analize življenjskega cikla (LCA) smo pokazali, v kakšnem obsegu je proizvodnja sončnih celic škodljiva za okolje ter kakšen je vpliv recikliranja le-teh ob koncu življenjske dobe za manjše onesnaževanje okolja in porabo virov. Pri ekonomskem vidiku trajnostnega potenciala smo z analizo treh različnih možnosti naložbe v samooskrbno sončno elektrarno prikazali finančni tok, ki ima v vseh treh možnostih vračilno dobo, krajšo od 10 let, in prihranke v družinskem proračunu tudi več kot 1.000 EUR na leto. Pokazali smo, da je nakup sončne elektrarne za samooskrbo z električno energijo ekonomsko upravičen, trajnosten in celo donosen. Analiza družbeno-socialnega vidika pokaže majhen vpliv na zaposlenost in dodano vrednost v Sloveniji, saj v Sloveniji obstaja le eno podjetje, ki proizvaja panele za sončne elektrarne. Pozitiven učinek na zaposlenost se kaže predvsem pri prodaji, upravljanju, servisu in montaži sončnih elektrarn. Izdelali smo analizo prednosti, slabosti, priložnosti in nevarnosti naložbe v sončno elektrarno ter jo primerjali z vetrno elektrarno.
Ključne besede: sončna elektrarna, trajnostni potencial, analiza življenjskega cikla, obnovljivi viri energije
Objavljeno: 19.12.2019; Ogledov: 143; Prenosov: 3
.pdf Polno besedilo (1,89 MB)

47.
Delavnice pisanja literarnih besedil in šolskih esejev
ana toroš, druga izvedena dela

Opis: Delavnice za dijake na Slovenskem licejskem polu v Gorici.
Ključne besede: kreativno pisanje, slog, besedni zaklad
Objavljeno: 19.12.2019; Ogledov: 147; Prenosov: 0
.pdf Polno besedilo (1,08 MB)

48.
Literatura na stičišču
ana toroš, predavanje na tuji univerzi

Opis: Predstavitev novih učnih pristopov s področja čezmejne didaktike književnosti. Primerjalni vidiki. Območje Furlanije Julijske krajine ter Goriške in Obalno-kraške regije.
Ključne besede: didaktika književnosti, manjšinska literatura, primerjalna književnost, imagologija, kolektivmna travma
Objavljeno: 18.12.2019; Ogledov: 105; Prenosov: 0
.pdf Polno besedilo (44,82 KB)
Gradivo ima več datotek! Več...

49.
Determination of Iron in Environmental Water Samples by FIA-TLS
Mladen Franko, Arne Bratkič, Dorota Korte, Hanna Budasheva, Leja Goljat, Gaja Tomšič, 2019, izvirni znanstveni članek

Opis: The determination of low concentration of iron in natural waters can be difficult due to the complexity of natural water, but primarily because it requires preconcentration of the sample with solvent extraction. In this work we report on results of thermal lens spectrometry (TLS) coupled to flow injection analysis (FIA) as a highly sensitive FIA-TLS method of iron detection. The concentration of iron redox species was determined using 1,10-phenanthroline (PHN), that forms stable complexes with Fe(II) ions which are characterized by an absorption maximum at 508 nm. The TLS system using a 633 nm probe laser and 530 nm pump laser beam was exploited for on-line detection in flow injection analysis, where a PHN solution was used as the carrier solution for FIA. The concentration of the complexing agent affects the quality of the TLS signal, and the optimal concentration was found at 1 mM PHN. The achieved limits of detection (LODs) for Fe(II) and total iron were 33 nM for Fe(II) and 21 nM for total iron concentration. The method was further validated by determining the linear concentration range, specificity in terms of analytical yield and by determining concentration of iron in a water sample from a local water stream.
Ključne besede: Flow injection analysis, iron concentration, thermal lens spectroscopy
Objavljeno: 18.12.2019; Ogledov: 101; Prenosov: 3
.pdf Polno besedilo (690,39 KB)

50.
Al Tahan, M.; Davvaz, B. , On Corsini hypergroups and their productional hypergroups. (Englishsummary)
Irina Cristea, 2019, recenzija, prikaz knjige, kritika

Ključne besede: hypergroup, productional hypergroup, order
Objavljeno: 18.12.2019; Ogledov: 108; Prenosov: 0
.pdf Polno besedilo (112,64 KB)

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