195 research outputs found

    An Insight Into Selected Properties of Merlot Wines Obtained from Three New Clone Candidates

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    Covering the period 2009-2012, the quality of Merlot wines obtained from three new clone candidates (namely Nos. 022, 025 and 029, respectively; fourth phase of clonal selection) developed in the Republic of Serbia was examined. The following parameters were determined: Folin-Ciocalteu (FC) index, pH value, total acidity, volatile acids, aldehydes, esters, relative density and ash. In comparison with the standard Merlot wine (originating from mother vine), FC index (from 35.73 to 37.15) and tasting score (from 17.89 to 17.95) were higher for the wines of all three clone candidates tested. These findings are in good agreement with the observed trend for the viticultural parameters indicating better properties of the new Merlot clone candidates versus mother

    Supplementary data for the article: Andrić, F.; Šegan, S.; Dramićanin, A.; Majstorović, H.; Milojković-Opsenica, D. Linear Modeling of the Soil-Water Partition Coefficient Normalized to Organic Carbon Content by Reversed-Phase Thin-Layer Chromatography. Journal of Chromatography A 2016, 1458, 136–144. https://doi.org/10.1016/j.chroma.2016.06.063

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    Supplementary material for: [https://doi.org/10.1016/j.chroma.2016.06.063]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2288]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3561

    An Insight Into Selected Properties of Merlot Wines Obtained from Three New Clone Candidates

    Get PDF
    Covering the period 2009-2012, the quality of Merlot wines obtained from three new clone candidates (namely Nos. 022, 025 and 029, respectively; fourth phase of clonal selection) developed in the Republic of Serbia was examined. The following parameters were determined: Folin-Ciocalteu (FC) index, pH value, total acidity, volatile acids, aldehydes, esters, relative density and ash. In comparison with the standard Merlot wine (originating from mother vine), FC index (from 35.73 to 37.15) and tasting score (from 17.89 to 17.95) were higher for the wines of all three clone candidates tested. These findings are in good agreement with the observed trend for the viticultural parameters indicating better properties of the new Merlot clone candidates versus mother

    Evaluation of the Quality of Drinking Water in Rasina District, Serbia: Physicochemical and Bacteriological Viewpoint

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    The water samples from Rasina District (Serbia) were evaluated for principal physical and chemical parameters, as well as for microbiological contaminants. Results were compared to National and World Health Organization (WHO) water quality standards. Several samples contained total organic matter, ammonia, residual chlorine, nitrite, nitrate, iron and manganese above proposed legislation limits. For samples contaminated with faecal bacteria, Streptococcus faecalis, aerobic mesophilic bacteria, coliform bacteria and sulfite-reducing clostridia special attention should be payed to drinking water disinfecting methods. The potential health risks of waterborne diseases due to consumption of water from contaminated sources could be implied

    Modification of the thermometric performance of the lifetime-based luminescent thermometer exploiting Ti3+ emission in SrTiO3 and CaTiO3 by doping with lanthanide ions

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    Luminescence thermometry exploiting luminescence kinetics as a thermometric parameter is regarded as one of the most reliable temperature readout techniques. Transition metal ions are of particular interest in this application which is due to the possibility of modulating their spectroscopic properties by changing the strength of the crystal field of the matrix. In this work, we present a strategy to modulate the thermometric parameters including the relative sensitivity and useful temperature range of luminescent thermometers based on the lifetime of Ti3+ ions by introducing lanthanide (Ln3+) doping in SrTiO3 and CaTiO3. The mutual effect of the distortion of the local symmetry of the Ti3+ ions associated with the introduction of Ln3+ ions and/or the Ti3+ → Ln3+ energy transfer enabled relative sensitivities of SR = 5.87% K−1 at 140 K for SrTiO3:Dy3+ and SR = 4.51% K−1 at 251 K for CaTiO3:Gd3+. © 2022 The Author(s

    Step by step optimization of luminescence thermometry in MgTiO3:Cr3+, Nd3+@SiO2 nanoparticles towards bioapplications

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    The increasing popularity of luminescent nanothermometry in recent years can be attributed to its application potential in biomedicine. In response to this need, we describe a biocompatible bimodal luminescent thermometer that operates in ratiometric and luminescence lifetime modes based on particles of MgTiO3:Cr3+,Nd3+@SiO2. The introduction of Cr3+ and Nd3+ dopants enabled the luminescence of Ti3+ ions to be observed, and the difference in the thermal quenching rates of Cr3+ (4T2→4A2), Ti3+ (2T2→2E) and Nd3+ (4F3/2 → 4I11/2) ions enabled the ratiometric thermometers. The highest sensitivity reaching SR = 1.00%K−1 was obtained for MgTiO3:0.1 % Cr3+, 0.1 % Nd3+ at 203 K. The shortening of the lifetime of the 4T2 level of Cr3+ ions associated with its thermal depopulation allows to develop a lifetime-based thermometer with a relative sensitivity reaching 0.85–1.18%K−1 in the physiological temperature range. The deposition of a SiO2 shell on a MgTiO3:Cr3+,Nd3+ did not introduce significant changes in the shape of the emission spectrum and slightly elongates the lifetime by reducing the probability of surface-related nonradiative processes. More importantly, the thermometric performance of this luminescence thermometer was preserved. The low cytotoxicity of the obtained materials underlines their potential in bioapplications of the described luminescent thermometers

    Strong sensitivity enhancement in lifetime-based luminescence thermometry by co-doping of SrTiO3:Mn4+ nanocrystals with trivalent lanthanide ions

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    The co-doping of SrTiO3:Mn4+ luminescent nanocrystals with trivalent lanthanide ions (Ln3+ = Lu3+, Tm3+, Er3+, Ho3+, Dy3+, Eu3+, and La3+) is demonstrated as a new strategy for significant sensitivity improvement of lifetime-based luminescent thermometers. SrTiO3:Mn4+:Ln3+ nanocrystals of about 25 nm diameter were prepared by the modified Pechini method and characterized using X-ray powder diffraction and electron microscopy techniques. The temperature dependence of Mn4+ emission in SrTiO3 was considerably altered by the co-doping of Ln3+ due to the cooperating effects of Mn4+ → Ti3+ and Mn4+ → Ln3+ energy transfers. A substantial enhancement of the relative sensitivity of lifetime-based thermometry as high as 145% with respect to the unco-doped nanocrystals reveals the success of the approach. The obtained values of maximal relative sensitivity for different Ln3+ co-dopants are 5.10% K−1 at 290 K for Er3+, 5.00% K−1 at 301 K for Eu3+, 4.84% K−1 at 303 K for Dy3+, 4.71% K−1 at 289 K for Ho3+, and 3.87% K−1 at 290.7 K for Lu3+
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