Iskanje po repozitoriju

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Opis: 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.
Najdeno v: ključnih besedah
Ključne besede: grape skins and seeds, extraction solvents, phenolic profile, antioxidant activity, antimicrobial activity, anti-adhesion activity to stainless steel
Objavljeno: 08.08.2016; Ogledov: 4411; Prenosov: 0
Polno besedilo (2,02 MB)

Opis: The concept of a (∈, ∈)-neutrosophic ideal is introduced, and its characterizations are established. The notions of neutrosophic permeable values are introduced, and related properties are investigated. Conditions for the neutrosophic level sets to be energetic, right stable, and right vanished are discussed. Relations between neutrosophic permeable S- and I-values are considered.
Najdeno v: ključnih besedah
Ključne besede: (∈, ∈)-neutrosophic subalgebra, (∈, ∈)-neutrosophic ideal, neutrosophic (anti-)permeable S-value, neutrosophic (anti-)permeable I-value, S-energetic set, I-energetic set
Objavljeno: 02.12.2019; Ogledov: 2099; Prenosov: 0
Polno besedilo (297,13 KB)

Najdeno v: ključnih besedah
Ključne besede: anti-totalitarian ideology, end of history, nationalist reconciliation, rehabilitation of fascism, Spomenka Hribar, Ljubljana's monument to reconciliation, Grahovo memorial
Objavljeno: 20.08.2020; Ogledov: 1687; Prenosov: 0
Polno besedilo (19,45 MB)

Opis: Cellulose is considered as an alternative for the demand of biocompatible and environmentally friendly food packaging. The aim of this study was to evaluate a composite film from regenerated cellulose combined with polyvinyl alcohol. Glycerol was used as a plasticizer. Mathematical models were used to describe the effect of the film structure on the mechanical (tensile strength, percentage of elongation at break) and barrier properties (water vapour permeability, light-barrier properties and transparency). The morphology, structural and thermal properties were evaluated by spectral analysis (FT-IR and UV-VIS-NIR), scanning electron microscopy and dif- ferential scanning calorimetry. Models predict cellulose-glycerol-polyvinyl alcohol films with tensile strength values from 25.9 to 369 MPa, similar to that of synthetic polymer films. The elongation at break of the developed films (0.89–18.7%) was lower than that of synthetic polymer films. The water vapour permeability obtained (2.32·10−11 - 3.01·10−11 g/s·m·Pa) was higher than that of petrochemical-based plastics. Cellulose films re- inforced with polyvinyl alcohol showed a smooth surface. Results showed that it is viable to accomplish com- posite films from cellulose-polyvinyl alcohol-glycerol with enhanced mechanical properties. The obtained films showed top values of transparency. The addition of glycerol resulted in films with a UV protective effect which could be important in food packaging to prevent lipid oxidative deterioration.
Najdeno v: ključnih besedah
Ključne besede: Regenerated cellulose, Tensile strength, Water vapor permeability, Anti-plasticizer, DSC, UV protection
Objavljeno: 14.12.2020; Ogledov: 1609; Prenosov: 0
Polno besedilo (727,71 KB)

Opis: n this talk I will present work in progress that aims to explore a previously uncharted area of multilingual language acquisition, which concerns negative linguistic transfer in the domain of pragmatics. The research is part of a larger program in experimental pragmatics which aims to identify points of cross-linguistic diversion that affect meaning. We investigate the impact of language variation on bilingual acquisition of grammatical number in pairs of languages like Lebanese Arabic and French, and Slovenian-Italian, in which the interpretation of plural morphology within each pair is different depending on whether the number paradigm also includes dual number or not.
Najdeno v: ključnih besedah
Ključne besede: negative transfer, plural interpretation, anti-duality, pragmatic enrichment
Objavljeno: 29.01.2021; Ogledov: 1826; Prenosov: 0
Polno besedilo (126,18 KB)