Search results for "Plinia"

showing 3 items of 3 documents

Phytochemical profile and antioxidative properties of Plinia trunciflora fruits: A new source of nutraceuticals.

2020

Abstract This study evaluated the polyphenol profile and the antioxidative properties of Plinia trunciflora (O. Berg) Kausel fruits. Folin-Ciocalteau and pH-jumping methods indicated that these berries are a major source of antioxidant polyphenols (1201.05 mg GAE/100 g FW), particularly anthocyanins. HPLC-DAD-ESI-MS/MS analysis identified cyanidine glycosides as the main components. Flavon-3-ols and hydrolysable-tannins were also found. CAA assay showed that extracts of P. trunciflora fruits prevent lipid peroxidation in HepG2 cells with higher efficacy than other colourful fruits (CAA50 935.25 mg FW/mL cell medium). Moreover, our results suggested that the observed antioxidant protection i…

AntioxidantDPPHmedicine.medical_treatmentMyrtaceaePhytochemicals01 natural sciencesAntioxidantsAnalytical ChemistryAnthocyaninsLipid peroxidationchemistry.chemical_compoundTandem Mass SpectrometrySettore BIO/10 - BiochimicaFood scienceChromatography High Pressure LiquidChromatographyABTSbiologyChemistryfood and beverages04 agricultural and veterinary sciencesGeneral MedicineHep G2 CellsJaboticaba040401 food scienceUp-RegulationPhytochemicalHigh Pressure LiquidAntioxidant enzymesMyrciaria truncifloraPlinia0404 agricultural biotechnologyNutraceuticalmedicineHumansGlutathione PeroxidasePlant ExtractsSuperoxide DismutaseAntioxidant enzyme010401 analytical chemistryPolyphenolsbiology.organism_classification0104 chemical sciencesPolyphenolFruitDietary SupplementsLipid PeroxidationAnthocyanins; Antioxidant enzymes; Cellular antioxidant activity (CAA); Jaboticaba; Myrciaria trunciflora; Antioxidants; Chromatography High Pressure Liquid; Dietary Supplements; Fruit; Glutathione Peroxidase; Hep G2 Cells; Humans; Lipid Peroxidation; Myrtaceae; Phytochemicals; Plant Extracts; Polyphenols; Superoxide Dismutase; Tandem Mass Spectrometry; Up-RegulationCellular antioxidant activity (CAA)Food ScienceFood chemistry
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Volatiles in pantellerite magmas: A case study of the Green Tuff Plinian eruption (Island of Pantelleria, Italy)

2013

Abstract The Green Tuff (GT) Plinian eruption, the largest in magnitude at Pantelleria, erupted 3 to 7 km3 DRE of pantellerite magma and a small volume of trachyte. Fifty-nine anorthoclase-hosted melt inclusions from the two basal pumice members were analyzed by FT-IR spectroscopy in order to assess the pre-eruptive H2O content in the pantellerite melt. Microanalytical methods were used to determine major element, Cl, F and S contents. Melt inclusions and glassy groundmasses have a nearly homogeneous pantelleritic composition (peralkaline index = 1.9-2.2) and variable water contents ranging from 1.4 to as high as 4.2 wt %, i.e. much higher than the 1.4 wt % of earlier published studies. The…

LavaSettore GEO/07 - Petrologia E PetrografiaGeochemistryTrachyteMagma chamberStrombolian eruptionGeophysicsEffusive eruptionGeochemistry and PetrologyPumiceMagmaThe Green Tuff (GT) Plinian eruption the largest in magnitude at Pantelleria erupted 3 to 7 km 3 DRE of pantellerite magma and a small volume of trachyte. Fifty-nine anorthoclase-hosted melt inclusions from the two basal pumice members were analyzed by FT-IR spectroscopy in order to assess the pre-eruptive H2Ocontent in the pantellerite melt. Microanalytical methods were used to determine major element Cl F and S contents. Melt inclusions and glassy groundmasses have a nearly homogeneous pantelleritic composition (peralkaline index = 1.9-2.2) and variable water contents ranging from 1.4 to as high as 4.2 wt % i.e. much higher than the 1.4 wt % of earlier published studies. The chlorine content is constant at about 1 wt %. Combined Cl and H2O data were used to estimate a confining pressure of about 50 MPa (depth around 2-3 km) for the GT magma chamber. The chamber was characterized by a compositional zoning with a dominant pantellerite overlying a trachyte magma. Soon after the GT eruption intra-caldera volcanism was dominated by the eruption of voluminous trachyte lavaflows while pantellerite melt production resumed after about 20 ka with numerous low-volume mildly explosive (Strombolian) to effusive eruptions. Comparison with data from the literature reveals that despite the differentexplosivity the post-caldera Strombolian eruptions and the GT Plinian eruption were fed by pantelleritic magmas with similar water contents. Chlorine and CO2contents suggest that the young magma reservoirs feeding the Strombolian to effusive activity were deeper (h≥4.5 km) than the much larger (based on erupted volumes) magma chamber which fed the GT eruptionGeologyMelt inclusionsJournal of Volcanology and Geothermal Research
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‘Popoli fantastici nei Bestiari’, in Le lingue e le letterature germaniche fra il XII e il XVI secolo. Atti del XXIX Convegno dell’Associazione Itali…

2004

The essay explores the several 'phantastic' beeings included in medieval Bestiaries, looking at their sources, changes, distribution and iconography.

manuscriptmonsterSettore L-FIL-LET/15 - Filologia Germanicamiddle agesPlinian racebestiarieiconographyphisiologu
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