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2. V-ORAL17c: Cationic Covalent Organic Polymer for Bacterial Cell Detection by Electrochemical Impedance SpectroscopyTina Skorjanc, Andraz Mavric, Mads Nybo Sorensen, Gregor Mali, Changzhu Wu, Matjaž Valant, 2022 Ključne besede: Electrochemical impedance spectroscopy, polymers, Menshutkin reaction, porphyrin, sensor
Objavljeno: 30.11.2022; Ogledov: 2261; Prenosov: 0
Ogledov v mesecu: 1226 |
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6. High Energy AstrophysicsLili YangOpis: I was invited as a lecturer at the Sumer School on Astrophysics and Astroparticles in Petnica Serbia. I gave talks on "High Energy Astrophysics", where I mainly focused on the production, propagation and detection of high energy astroparticles. Especially, I introduced the current experiments and technique and facilities.
Ključne besede: High-energy astroparticles, experiments, detection, production
Objavljeno: 06.12.2016; Ogledov: 5594; Prenosov: 0
Ogledov v mesecu: 714 |
7. Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushroomsAnja Kavčič, Klemen Mikuš, Marta Debeljak, Johannes Teun van Elteren, Iztok Arčon, Alojz Kodre, Peter Kump, Andreas-Germanos Karydas, Alessandro Migliori, Mateusz Czyzycki, Katarina Vogel-Mikuš, 2019 Opis: This study provides information on mercury (Hg) localization, speciation and ligand environment in edible mushrooms: Boletus edulis, B. aereus and Scutiger pes-caprae collected at non-polluted and Hg polluted sites, by LA-ICP-MS, SR-μ-XRF and Hg L3-edge XANES and EXAFS. Mushrooms (especially young ones) collected at Hg polluted sites can contain more than 100 μg Hg g−1 of dry mass. Imaging of the element distribution shows that Hg accumulates mainly in the spore-forming part (hymenium) of the cap. Removal of hymenium before consumption can eliminate more than 50% of accumulated Hg.
Mercury is mainly coordinated to di-thiols (43–82%), followed by di-selenols (13–35%) and tetra-thiols (12–20%). Mercury bioavailability, as determined by feeding the mushrooms to Spanish slugs (known metal bioindicators owing to accumulation of metals in their digestive gland), ranged from 4% (S. pes-caprae) to 30% (B. aereus), and decreased with increasing selenium (Se) levels in the mushrooms. Elevated Hg levels in mushrooms fed to the slugs induced toxic effects, but these effects were counteracted with increasing Se concentrations in the mushrooms, pointing to a protective role of Se against Hg toxicity through HgSe complexation. Nevertheless, consumption of the studied mushroom species from Hg polluted sites should be avoided.
Ključne besede: edible mushrooms, HgSe complex, imaging of elemental distribution, LA-ICP-MS, alpha-XRF, XAS
Objavljeno: 24.10.2019; Ogledov: 3979; Prenosov: 0
Ogledov v mesecu: 714 |
8. ASSESSMENT OF THE FEASIBILITY OF A MOBILE APP AIMED FOR THE PROMOTION OF A COMPANYHao Jiang, 2020 Opis: For a newly established company, one of the most important issues is to promote its own products and/or services. How to survive among many competitors is a problem, which is worthy of attention.
With the popularity of mobile devices, the networks, information and digital society has been established, where global e-commerce has been improved and developed. In this society, for a new company it is highly desirable to use e-commerce promotion methods, which include making a mobile application. However, there is still an open question whether a mobile app can be used as an efficient e-commerce promotion method.
In this thesis first an app has been developed for connecting the users and suppliers of musical instruments. All the users are able to share their homemade videos while playing musical instruments and exchange thoughts with all the users. At the same time, all the musical instruments related products can be merchandized between the users and merchant.
Then we addressed two issues after the app has been tested:
1. For a startup, is it worth developing a product-related app?
2. In the process of using the app, what kind of attitude is the user taking on the internal product advertisement?
An experiment has been set up in which 30 participants were randomly selected. Their behavior has been monitored for one month and the obtained data have been analyzed.
The main result of the analysis is that 70% of the participants believe that developing an app brings certain benefit to the company. The remaining 30% of the participants think that they would love to continue to use the app after the experiment. At the same time, they have a certain interest in product advertising in the app.
Ključne besede: Android smartphone app, company promotion, e-commerce, sampling analysis, app development.
Objavljeno: 28.10.2020; Ogledov: 3440; Prenosov: 89
 Celotno besedilo (918,26 KB)
Ogledov v mesecu: 697 |
9. A method for quantification of mineral dust in air based on optical absorption of particles concentrated by a virtual impactor and a device performing the said methodLuka Drinovec, Griša Močnik, Iasonas Stavroulas, Spiros Bezantakos, Michael Pikridas, Florin Unga, Jean Sciare, 2024 Opis: The present invention belongs to the field of devices and methods for measurement of particle concentration, more precisely to the field of devices and methods for quantification of particles based on their physical characteristics, especially with the use of optical means. The invention relates to a method for determination of ambient mineral dust concentration based on optical absorption of particles concentrated by a virtual impactor as well as a device performing the said method. The method comprises the following steps:- Sampling air samples with particle size smaller than 1 µm (PM1) and sampling air samples with particle size up to 10 µm;- Concentrating the samples with particle sizes up to 10 µm with a virtual impactor;- Measuring optical absorption of collected samples at least one wavelength from UV to IR spectre, preferably from 370 to 950 nm, most preferably at 370 nm;- Subtracting the absorption of the samples with particle size smaller than 1 µm from the absorption of the sample concentrated by the virtual impactor.
Ključne besede: dust, black carbon, aerosols
Objavljeno: 24.04.2024; Ogledov: 651; Prenosov: 2
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Ogledov v mesecu: 651 |
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