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* old and bolonia study programme


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Vacancy formation on C60/Pt (111)
Sandra Gardonio, Anna L Pinardi, 2014, original scientific article

Found in: osebi
Keywords: fullerenes, spectroscopy, metal organic interfaces
Published: 09.05.2017; Views: 1275; Downloads: 8
URL Fulltext (0,00 KB)

In silico generation of peptides by replica exchange Monte Carlo: Docking-based optimization of maltose-binding-protein ligands
Anna Russo, Pasqualina Liana Scognamiglio, Rolando Pablo Hong Enriquez, Carlo Santambrogio, Rita Grandori, Daniela Marasco, Antonio Giordano, Giacinto Scoles, Sara Fortuna, 2015, original scientific article

Abstract: Short peptides can be designed in silico and synthesized through automated techniques, making them advantageous and versatile protein binders. A number of docking-based algorithms allow for a computational screening of peptides as binders. Here we developed ex-novo peptides targeting the maltose site of the Maltose Binding Protein, the prototypical system for the study of protein ligand recognition. We used a Monte Carlo based protocol, to computationally evolve a set of octapeptides starting from a polialanine sequence. We screened in silico the candidate peptides and characterized their binding abilities by surface plasmon resonance, fluorescence and electrospray ionization mass spectrometry assays. These experiments showed the designed binders to recognize their target with micromolar affinity. We finally discuss the obtained results in the light of further improvement in the ex-novo optimization of peptide based binders.
Found in: osebi
Keywords: peptides, docking, optimisation, computation, maltose binding protein, probe, ligand
Published: 12.10.2016; Views: 1346; Downloads: 64
.pdf Fulltext (4,27 MB)

A Mechanistic Study of Magnesium Sulfur Batteries
Ana Robba, Alen Vižintin, Jan Bitenc, Gregor Mali, Iztok Arčon, Matjaž Kavčič, Matjaž Žitnik, Klemen Bučar, Giuliana Aquilanti, Charlotte Martineau-Corcos, Anna Randon-Vitanova, Robert Dominko, 2017, original scientific article

Abstract: Magnesium sulfur batteries are considered as attractive energy storage devices due to the abundance of electrochemically active materials and high theoretical energy density. Here we report the mechanism of a Mg-S battery operation, which was studied in the presence of simple and commercially available salts dissolved in a mixture of glymes. The electrolyte offers high sulfur conversion into MgS in the first discharge with low polarization. The electrochemical conversion of sulfur with magnesium proceeds through two well-defined plateaus, which correspond to the equilibrium between sulfur and polysulfides (high-voltage plateau) and polysulfides and MgS (low-voltage plateau). As shown by XANES, RIXS and NMR studies, the end discharge phase involves MgS with Mg atoms in a tetrahedral environment resembling the wurtzite structure, while chemically synthesized MgS crystalizes in the rock-salt structure with octahedral coordination of magnesium.
Found in: osebi
Keywords: magnesium, sulfur, rechargeable batteries, XAS, NMR
Published: 19.10.2017; Views: 1298; Downloads: 0
.pdf Fulltext (1,48 MB)

Role of Cu current collector on electrochemical mechanism of Mg–S battery
Ana Robba, Maja Mežnar, Alen Vižintin, Jan Bitenc, Jernej Bobnar, Iztok Arčon, Anna Randon-Vitanova, Robert Dominko, 2020, original scientific article

Abstract: Development of magnesium sulfur battery is accompanied with all known difficulties present in Li–S batteries, however with even more limited choice of electrolytes. In the present work, the influence of current collector on electrochemical mechanism was investigated in light of different reports where improved behavior was ascribed to electrolyte. Notable differences in cycling behavior are reported when Al current collector is replaced by Cu current collector independent of electrolyte. The initial reduction of sulfur follows similar reaction path no mater of current collector, but formation of MgS can be in competition with formation of CuS in the presence of Cu cations. With the subsequent cycling cells prepared from cathodes deposited on Cu current collector show decrease in the voltage and formation of single plateau during cycling. The change corresponds to the involvement of Cu into the reaction and formation of redox couple Mg/CuS as determined by Cu K-edge XANES measurements. Corrosion of Cu foil is identified by SEM and serves as a source of Cu cations for the chemical reaction between Cu and polysulfides. Mg/CuS redox couple shows improved cycling stability, but theoretical energy density is severely reduced due to substitution of S with CuS as cathode active material.
Found in: osebi
Keywords: Magnesium Sulfur Rechargeable batteries Current collector Copper Corrosion
Published: 16.01.2020; Views: 246; Downloads: 0
.pdf Fulltext (1,86 MB)

The Road Movie
Anna Loi, 2018, undergraduate thesis

Abstract: Film Ceste je pojav s širokimi družbenimi in kulturnimi posledicami. Pričujoče diplomsko delo analizira značilnosti tega žanra, pri čemer upošteva nekatere najpomembnejše filme, ki so se izkazali za ključne za razvoj žanra. V povojnem obdobju, ko se je družba spreminjala, ko se je ponovno pojavil optimizem in ko se je življenjski standard povzpel do točke, da si je tudi srednji sloj lahko privoščil potovanja brez posebnega razloga, je postal tako imenovani “road movie” oziroma film ceste množični ameriški pojav, ki je bil v veliki meri je bil povezan tudi s prostranostjo ZDA in z njenimi temeljnimi kulturnimi spremembami. Ta filmski žanr se je kmalu razširil po vsem svetu in ustvaril lastna pravila in zgodovino, postal pa je tudi glasnik generacije 60. let 20. stoletja. Do danes se filmi ceste še vedno dotikajo teme samospoznavanja in odkrivanja in pogosto ne predstavljajo le fizičnega, temveč tudi metaforično potovanje vase, prav tako pa zelo pogosto vsebujejo politično izjavo.
Found in: osebi
Keywords: potovanje, film, cesta, upor, samospoznavanje
Published: 19.12.2018; Views: 1244; Downloads: 25
.pdf Fulltext (94,16 MB)

Development of encapsulation techniques for the production and conservation of synthetic seeds in ornamental plants
Yelda Ozden-Tokatli, Anna De Carlo, Fusun Gumusel, Sara Pignattelli, Maurizio Lambardi, 2008, original scientific article

Abstract: The synthetic seed ("synseed") technology, initially developed through the encapsulation of somatic embryos, is now available for the use with non-embryogenic in vitro-derived explants, such as buds and nodal segments. For ornamental plants, to date there are few reports dealing with the production and the conservation of synseeds. Hence, the present study was conducted to develop an efficient encapsulation protocol for apical and axillary buds from various ornamental shrubs, i.e., oleander (Nerium oleander L.), photinia (Photinia fraseri Dress.), and lilac (Syringa vulgaris L.). For encapsulation, apical and axillary buds were excised, directly immersed in a Na-alginate solution, and then released dropwise in 100 mM CaCl2 center dot 2H(2)O for bead hardening. With photinia, best results were achieved when the synseeds were prepared using 3% Na-alginate, beads hardened for 30 min and germinated on hormone-free or BA-containing gelled MS medium. Thus, up to 92% of synseeds germinated and converted to shoots in a period of 10-11 days. The synthetic seeds of lilac, containing apical buds, showed a shorter germination time when 10-30 g 1(-1) sucrose was included in their "artificial endosperm". Successful medium-term conservation was then achieved with the storage of synthetic seeds at 4 degrees C in the dark on gelled MS medium, where up to 75% (oleander) and and 9 1 % (photinia) synseeds still germinated after 2 or 3 months of cold storage, respectively. Moreover, promising results have been obtained with the cryopreservation of photinia apical buds by means of the technique of "encapsulation-dehydration".
Found in: osebi
Keywords: conservation, cryopreservation, encapsulation, ornamentals, synthetic seeds
Published: 20.04.2020; Views: 149; Downloads: 0
.pdf Fulltext (3,94 MB)

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