1. The impact of gravel extraction on hyporheic ecology: a case study of the Bača river (W Slovenia)Nataša Mori, 2008, doctoral dissertation Found in: ključnih besedah
Summary of found: ...particulate organic matter, POM, fine sediment, ETS activity, electron transport system, sediments, Nematoda, Harpacticoida, Chironomidae,...
Keywords: hyporheic invertebrate, Soča river, Bača river, hyporheic biota, benthic organisms, particulate organic matter, POM, fine sediment, ETS activity, electron transport system, sediments, Nematoda, Harpacticoida, Chironomidae, gravel extraction, environmental impact assessment
Published: 19.02.2015; Views: 4525; Downloads: 369
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3. Thermal properties of surface-modified [alpha] and [epsilon]-Fe [sub] 2O [sub] 3 photocatalysts determined by beam deflection spectroscopyFernando Fresno, Mladen Franko, Dorota Korte, Giorgio Carraro, 2014, published scientific conference contribution Found in: ključnih besedah
Summary of found: ...photocatalytic activity, photothermal beam deflection spectroscopy, thin films, ...
Keywords: photocatalytic activity, photothermal beam deflection spectroscopy, thin films
Published: 16.06.2016; Views: 4083; Downloads: 151
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5. Polyphenol, antioxidant and antimicrobial potential of six different white and red wine grape processing leftoversPeter Raspor, Sonja Smole Možina, Katja Jug, Melita Sternad Lemut, Branka Mozetič Vodopivec, Anja Klančnik, Kajetan Trošt, 2016, original scientific article Abstract: BACKGROUND
During winemaking, grape polyphenols are only partly extracted, and consequently unexploited. The main aim was to characterise the phenolic content of freeze-dried grape skin and seed (FDSS) extracts obtained from Slovenian and international grape varieties and evaluate their antioxidant, antimicrobial, and anti-adhesive activities.
RESULTS
FDSS of six Vitis vinifera L. grapevine cultivars from Vipava Valley region (Slovenia) underwent extraction and sonification under different conditions. Flavonols were the predominant content of extracts from white ‘Zelen’ and ‘Sauvignon Blanc’ grape varieties, with strong antimicrobial activities against Gram-negative bacteria. ‘Pinot Noir’ FDSS extracted with 50% aqueous ethanol extraction produced a high phenolic content in the final extract, which was further associated with strong antioxidant and antimicrobial activities against all tested bacteria. Bacterial adhesion to stainless steel surfaces with minimal and maximal surface roughness was significantly inhibited (up to 60%) across a wide FDSS concentration range, with lower concentrations also effective with two types of stainless steel surfaces.
CONCLUSION
FDSS extracts from winery by-products show interesting phenolic profiles that include flavonols, catechins, anthocyanins, and hydroxycinnamic acids, with yields influenced by grapevine cultivar and extraction conditions. The antioxidant, antimicrobial and anti-adhesive activities of 50% aqueous ethanol ‘Pinot Noir’ FDSS extract reveals potential applications in food, pharmaceutical and cosmetic industries for these bioactive residues.
Found in: ključnih besedah
Summary of found: ...and seeds, extraction solvents, phenolic profile, antioxidant activity, antimicrobial activity, anti-adhesion activity to stainless steel...
Keywords: grape skins and seeds, extraction solvents, phenolic profile, antioxidant activity, antimicrobial activity, anti-adhesion activity to stainless steel
Published: 08.08.2016; Views: 4298; Downloads: 0
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6. Atomically resolved dealloying of structurally ordered Pt nanoalloy as an oxygen reduction reaction electrocatalystAndraž Pavlišič, Primož Jovanovič, Vid Simon Šelih, Martin Šala, Marjan Bele, Goran Dražić, Iztok Arčon, Samo B. Hočevar, Anton Kokalj, Nejc Hodnik, Miran Gaberšček, original scientific article Abstract: The positive effect of intermetallic ordering of platinum alloy nanoparticles on oxygen reduction reaction (ORR) activity has been well established. What is still missing is an understanding of selective leaching of the less noble metal from the ordered structure and its correlation to longterm ORR performance. Using a combination of kinetic Monte Carlo simulations and advanced characterization techniques, we provide unprecedented insight into dealloying of intermetallic PtCu3 nanoparticles a well-known binary alloy. Comparison of ordered and disordered samples with identical initial compositions and particle size distributions reveals an unexpected correlation: whereas the copper dealloying rates in the ordered and disordered counterparts are almost the same, in the ordered structure Pt atoms are surrounded by 15−30% more Cu atoms throughout all the stages of acid leaching. This more convenient Pt−Cu coordination explains the statistically significant increase of 23−37% in ORR activity of the ordered structure at all stages of alloy degradation.
Found in: ključnih besedah
Summary of found: ...alloy nanoparticles on oxygen reduction reaction (ORR) activity has been well established. What is still...
Keywords: ORR activity, fuel cells, platinum alloy, nanoparticle stability, intermetallic ordering, kinetic Monte Carlo, dealloying, in situ ICP-MS
Published: 27.09.2016; Views: 4700; Downloads: 0
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7. Luteal activity and effect of dietary energy restriction on follicular development in lactating cowsAntonella Comin, Tanja Peric, M. Montillo, Maria Cristina Veronesi, Vittorio Marchi, Alberto Cappa, Alberto Prandi, 2017, original scientific article Abstract: The aim of this research has been to evaluate the presence of anomalies in the ovarian cycle activity during postpartum and to verify whether 72-hr dietary fasting during the dominance phase, the phase before ovulation, might modify the ovarian follicle population. The presence of anomalies in ovarian cycle activity has been evaluated in 30 Italian Friesian cows starting from 20 days postpartum until 211 days of lactation. Long oestrus and brief dioestrus or scarce luteal activity have been the main anomalies found through measuring progesterone concentrations in the whey. Until 100 days of lactation, the BCS values of the problematic animals have been significantly lower than those in animals with normal ovarian activity. After 100 days of lactation, the ovarian anomalies continued to appear despite the fact that all the animals have reached comparable BCS values. Starting from the results of this trial, the effect of 72-hr
dietary fasting on dominant follicles has been studied in six cows. Ultrasonography revealed that the diameter of the follicles at 71 days postpartum has been significantly lower than at 181 days. A 72-hr dietary restriction at 101 and 211 days postpartum did not affect the size of the dominant follicle. However, at 101 days postpartum, half of the animals presented follicular cysts. The effect of fasting differed if the animal has been in early postpartum or 211 days of lactation. Further researches are necessary to understand
how different metabolic conditions can modify the follicular population but on the other hand the study shows the utility for farmers and field veterinarians of monitoring the resumption of the ovarian cycle postpartum through the whey progesterone
concentrations.
Found in: ključnih besedah
Keywords: dairy cow, cyclic activity, follicles, fasting
Published: 06.04.2017; Views: 3593; Downloads: 0
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10. RAPID AND HIGHLY SENSITIVE DETERMINATION OF ACETYLCHOLINESTERASE ACTIVITY IN BLOOD PLASMA BY FLOW INJECTION-THERMAL LENS SPECTROMETRYMojca Žorž, Andrej Jerkič, Dorota Korte, Martina Bergant-Marušič, Damjana Drobne, Mladen Franko, 2017, published scientific conference contribution abstract Found in: ključnih besedah
Keywords: THERMAL LENS SPECTROMETRY, ACETYLCHOLINESTERASE ACTIVITY, BLOOD PLASMA
Published: 30.08.2017; Views: 3769; Downloads: 0
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