Repository of University of Nova Gorica

Search the repository
A+ | A- | Help | SLO | ENG

Query: search in
search in
search in
search in
* old and bologna study programme

Options:
  Reset


41 - 50 / 165
First pagePrevious page12345678910Next pageLast page
41.
42.
43.
Academic career route
Iztok Arčon, unpublished invited conference lecture

Abstract: Early career scientists have developed a wealth of both generic and specialist skills opening a large number of possible career paths both within and beyond academic research. One of the problems that most PhD students, postdocs and other early career scientists find however is a significant lack of careers advice about the breadth of opportunities open to them both within academia and in commercial industry. The event will feature a number of speakers from a very diverse range of science careers, who will discuss their experiences and share advice on finding the best job opportunities.
Keywords: academic career, generic skills, PhD students, post-doctoral fellows
Published in RUNG: 02.11.2020; Views: 2682; Downloads: 0
This document has many files! More...

44.
Temporal and spatial patterns of zinc and iron accumulation during barley (Hordeum vulgare L.) grain development. Journal of agricultural and food chemistry.
Amelie Detterbeck, Paula Pongrac, Daniel Persson, Katarina Vogel-Mikuš, Mitja Kelemen, Primož Vaupetič, Primož Pelicon, Iztok Arčon, Søren Husted, Jan Kofod Shjoerring, Stephan Clemens, 2020, original scientific article

Abstract: Breeding and engineering of biofortified crops will benefit from a better understanding of bottlenecks controlling micronutrient loading within the seeds. However, few studies have addressed the changes in micronutrient concentrations, localization, and speciation occurring over time. Therefore, we studied spatial patterns of zinc and iron accumulation during grain development in two barley lines with contrasting grain zinc concentrations. Microparticle-induced-X-ray emission and laser ablationinductively coupled plasma mass spectrometry were used to determine tissue-specific accumulation of zinc, iron, phosphorus, and sulfur. Differences in zinc accumulation between the lines were most evident in the endosperm and aleurone. A gradual decrease in zinc concentrations from the aleurone to the underlying endosperm was observed, while iron and phosphorus concentrations decreased sharply. Iron co-localized with phosphorus in the aleurone, whereas zinc co-localized with sulfur in the sub-aleurone. We hypothesize that differences in grain zinc are largely explained by the endosperm storage capacity. Engineering attempts should be targeted accordingly.
Keywords: barley (Hordeum vulgare L.), biofortification, grain development, grain loading, LA-ICP-MS, μ-PIXE
Published in RUNG: 20.10.2020; Views: 2669; Downloads: 0
This document has many files! More...

45.
VELIKOKRAT NAS JE PRESENETILO, KAJ ATOMI DEJANSKO POČNEJO : IZTOK ARČON
Iztok Arčon, Nina Slaček, radio or television broadcast, podcast, interview, press conference

Abstract: Razvoj novih materialov, nanotehnologije, molekularne biologije in še številnih drugih področij sodobnih znanosti je tesno povezan s podrobnim razumevanjem tega, kaj se dejansko dogaja na molekularnem oziroma atomskem nivoju. Za razvoj denimo novih nanostrukturnih materialov za baterije prihodnosti je nujno videti, kaj se v njih dejansko dogaja med samim delovanjem. To omogoča rentgenska absorpcijska spektroskopija s sinhrotronsko svetlobo. »Ko z rentgenskim žarkom posvetimo na snov, iz atoma izbijemo elektron in ta odleti v okolico, se od nje odbija in nam na ta način sporoči, kaj se v njegovi okolici nahaja,« razlaga osnovni princip te metode prof. dr. Iztok Arčon. Na ta način je mogoče pridobiti številne ključne podatke, ki pogosto na glavo postavijo predhodne domneve raziskovalcev. A za takšne raziskave je nujen sinhrotron. Tovrstnih pospeševalnikov ni veliko in merilni čas na sinhrotronu je potrebno pridobiti z vrhunsko zastavljenimi raziskavami. A tokratni gost Podob znanja, dr. Iztok Arčon, redni profesor na Univerzi v Novi Gorici, ima po zaslugi svojega znanstvenega dela na tem področju na široko odprta vrata, sodeluje pa raziskovalnimi skupinami z zelo različnih področij. Letos je za svoje dosežke prejel tudi Preglovo nagrado. Foto: iz osebnega arhiva Iztoka Arčona
Keywords: rentgenska absorpcijska spektroskopija, sinhrotronsko sevanje, raziskave nanomaterialov, Preglova nagrada 2020
Published in RUNG: 19.10.2020; Views: 2611; Downloads: 0
This document has many files! More...

46.
X-ray absorption spectroscopy analysis: in situ, operando, in vivo
Iztok Arčon, 2020, published scientific conference contribution abstract (invited lecture)

Abstract: X-ray absorption spectroscopy (XAS) is a powerful tool for characterisation of local structure and chemical state of selected elements in different new functional materials and biological or environmental samples. The XAS spectroscopy is based on extremely bright synchrotron radiation X-rays sources, which allow precise characterisation of bulk, nanostructured or highly diluted samples. With its two methods (XANES and EXAFS) it enables monitoring changes in valence states and local structures of constituent elements during chemical reactions under controlled reaction conditions, and it offers a possibility of a combination of X-ray spectroscopy and microscopy with sub-micron lateral resolution, crucial for analysis of biological samples on sub-cellular level. In this talk some typical examples of advanced XAS analysis will be presented.
Keywords: X-ray absorption spectroscopy, EXAFS, XANES, in-situ, operando
Published in RUNG: 17.10.2020; Views: 2975; Downloads: 0
This document has many files! More...

47.
48.
Spectroscopic insights into the electrochemical mechanism of rechargeable calcium/sulfur batteries
Antonio Scafuri, Romain Berthelot, Klemen Pirnat, Alen Vižintin, Jan Bitenc, Giuliana Aquilanti, Dominique Foix, Rémi Dedryvère, Iztok Arčon, Robert Dominko, Lorenzo Stievano, 13, original scientific article

Abstract: Calcium batteries represent a promising alternative to lithium metal systems. The combination of the low redox potential and low cost and the energy-dense calcium anode (2073 mAh/cm3, similar to 2044 mAh/cm3 for Li) with appropriate low-cost cathode materials such as sulfur could produce a game-changing technology in several fields of applications. In this work, we present the reversible activity of a proof-of-concept Ca/S battery at room temperature, characterized by a surprising medium-term cycling stability with low polarization, promoted by the use of a simple positive electrode made of sulfur supported on an activated carbon cloth scaffold, and a state-of-the-art fluorinated alkoxyborate-based electrolyte. Insights into the electrochemical mechanism governing the chemistry of the Ca/S system were obtained for the first time by combining X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The mechanism implies the formation of different types of soluble polysulfide species during both charge and discharge at room temperature, and the formation of solid CaS at the end of discharge. The reversible electrochemical activity is proven by the reformation of elemental sulfur at the end of the following charge. These promising results open the way to the comprehension of emerging Ca/S systems, which may represent a valid alternative to Mg/S and Li/S batteries.
Keywords: Calcium/Sulfur Batteries EXAFS, XANES
Published in RUNG: 17.10.2020; Views: 2822; Downloads: 0
This document has many files! More...

49.
A mechanistic study of metal sulfur batteries
Robert Dominko, Alen Vižintin, Sara Drvarič Talian, Ana Robba, Iztok Arčon, 2018, published scientific conference contribution abstract (invited lecture)

Keywords: Li-sulphur batteries, Sulphur XANES, magnesium
Published in RUNG: 15.10.2020; Views: 2313; Downloads: 0

50.
Search done in 0.06 sec.
Back to top