Search results for "Cynara"

showing 5 items of 15 documents

Metabolite and mineral profiling of “Violetto di Niscemi” and “Spinoso di Menfi” globe artichokes by 1H-NMR and ICP-MS

2016

Globe artichoke has been long considered a nutraceutical food for its valuable content of bioactive compounds. However, beside a well-known polyphenol profile, poor information is available about its metabolite and mineral composition. The aim of this study was to investigate edible parts of Sicilian artichokes, ‘Spinoso di Menfi’ and ‘Violetto di Niscemi’, by 1H NMR and ICP-MS for elucidating these compositional aspects. Although bracts and hearts of both artichokes shared a very similar metabolite pattern, ‘Spinoso di Menfi’ showed a higher number of metabolites, such as amino acids and polyphenols, than ‘Violetto di Niscemi’. ‘Spinoso di Menfi’ was also marked by higher levels of macro- …

Metabolitetrace elementsPlant ScienceMineral compositionBiologyPlant foods01 natural sciencesBiochemistryAnalytical Chemistrychemistry.chemical_compoundNutraceuticalnutraceutical foodBotanyFood sciencemacromineralsInductively coupled plasma mass spectrometryBract010405 organic chemistryCynara cardunculus L. subsp scolymus (L.) Hegi; nutraceutical food; macrominerals; trace elementsOrganic ChemistryCynara cardunculus L. subsp scolymus (L.) Hegi0104 chemical sciences010404 medicinal & biomolecular chemistrychemistryPolyphenolProton NMR
researchProduct

POLYPHENOL OXIDASE ACTIVITY FROM THREE SICILIAN ARTICHOKE (CYNARA CARDUNCULUS L. VAR. SCOLYMUS L. (FIORI)) CULTIVARS: STUDIES AND TECHNOLOGICAL APPLI…

2010

Several papers helped with the development of more methods to control browning, or study thermal polyphenol oxidase (PPO) inactivation, but did not provide any solutions to technological process problems and food process improvement. Artichokes [ Cynara cardunculus L. var. scolymus L. (Fiori)] are susceptible to browning; this alteration could affect and reduce the suitability for its use, fresh or processed. Within this study, the catecholase and cresolase activities of PPO from three different Sicilian artichokes cultivar were characterized with regard to substrate specificity and enzyme kinetics, optimum pH and temperature, temperature and pH stability, and inhibitor test; all of the res…

Polyphenol oxidaseFood HandlingPolyphenol oxidaseSubstrate SpecificityCynara scolymusBotanyEnzyme StabilityBrowningCynara cardunculus L. var. scolymus L. (Fiori)CultivarCatechol oxidaseSicilyPlant ProteinsbiologyChemistryCynara scolymusCynaraTemperaturefood and beveragesGeneral Chemistrybiology.organism_classificationinhibitionHorticultureKineticsbiology.proteinPostharvestScolymusenzymatic browningGeneral Agricultural and Biological SciencesCatechol Oxidase
researchProduct

Green direct determination of mineral elements in artichokes by infrared spectroscopy and X-ray fluorescence.

2015

Near infrared (NIR) and X-ray fluorescence (XRF) spectroscopy were investigated to predict the concentration of calcium, potassium, iron, magnesium, manganese and zinc in artichoke samples. Sixty artichokes were purchased from different Spanish areas (Benicarlo, Valencia and Murcia). NIR and XRF spectra, combined with partial least squares (PLS) data treatment, were used to develop chemometric models for the prediction of mineral concentration. To obtain reference data, samples were mineralised and analysed by inductively coupled plasma optical emission spectrometry (ICP-OES). Coefficients of determination obtained for the regression between predicted values and reference ones for calcium, …

Spectrophotometry InfraredIronAnalytical chemistrychemistry.chemical_elementX-ray fluorescenceInfrared spectroscopyZinc01 natural sciencesFluorescenceAnalytical ChemistryCynara scolymusPartial least squares regressionMagnesiumLeast-Squares AnalysisSpectroscopyManganeseMinerals010405 organic chemistryMagnesiumX-Rays010401 analytical chemistryNear-infrared spectroscopySpectrometry X-Ray EmissionGeneral Medicine0104 chemical sciencesZincchemistryPotassiumInductively coupled plasmaFood ScienceFood chemistry
researchProduct

Artichoke (Cynara cardunculus L.) fibres as potential reinforcement of composite structures

2011

Abstract The aim of this paper is to examine the use of artichoke fibres as potential reinforcement in polymer composites. The fibres are extracted from the stem of artichoke plant, which grows in Southern Sicily. In order to use these lignocellulosic fibres as potential reinforcement in polymer composites, it is fundamental to investigate their microstructure, chemical composition and mechanical properties. Therefore, the morphology of artichoke fibres was investigated through electron microscopy, the thermal behaviour through thermogravimetric analysis and the real density through a helium pycnometer. The chemical composition of the natural fibres in terms of cellulose, lignin, and ash co…

Thermogravimetric analysisMaterials scienceScanning electron microscopy (SEM)Composite number02 engineering and technologyD. Infrared (IR) spectroscopy010402 general chemistry01 natural sciencesB. Mechanical properties; D. Infrared (IR) spectroscopy; D. Scanning electron microscopy (SEM); D. Thermogravimetric analysis (TGA); Lignocellulosic fibreschemistry.chemical_compoundUltimate tensile strengthLigninCelluloseComposite materialNatural fiberB. Mechanical propertiesbiologyD. Thermogravimetric analysis (TGA)Thermogravimetric analysis (TGA)CynaraGeneral EngineeringD. Scanning electron microscopy (SEM)021001 nanoscience & nanotechnologyMicrostructurebiology.organism_classificationLignocellulosic fibres0104 chemical sciencesSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryCeramics and Composites0210 nano-technologyInfrared (IR) spectroscopyMechanical propertieLignocellulosic fibre
researchProduct

The monophyly and evolution of Cynara L. (Asteraceae) sensu lato: evidence from the Internal Transcribed Spacer region of nrDNA

2005

The monophyly and evolution of Cynara was investigated using ITS sequence data. Parsimony analysis supports the monophyly of Cynara sensu lato, i.e. including the distinctive taxa C. humilis and C. tournefortii. This contradicts the recent decision to create a new monotypic genus Arcyna for C. tournefortii. A hypothesised close relationship between C. tournefortii and Silybum Adans. is also refuted. Four of the five species of Cynara, for which multiple accessions were sequenced, were shown to be monophyletic but C. baetica was found to be non-monophyletic. Free energy estimates for ITS1 secondary structure and conservation of the 5.8S region suggest that this is not due to the occurrence o…

biologyAsteraceae Carduinae Cynara Arcyna molecular phylogeny ITS pseudogenes hybridisationCynaraPlant ScienceAsteraceaebiology.organism_classificationMonophylyTaxonSensuGenusBotanyMolecular phylogeneticsInternal transcribed spacerEcology Evolution Behavior and SystematicsPlant Systematics and Evolution
researchProduct