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Functional Plant Science and Biotechnology, 2010
Xanthones are an important family of polyphenols present in Garcinia mangostana fruit. Products of G. mangostana have begun to be commercialized as a dietary supplement because of their potent antioxidant properties. Interest in their beneficial health effects such as antioxidant characteristics, lipid profile and anticarcinogenic activity, etc., has encouraged scientific research to determine compounds responsible for these properties. The antioxidant capacity determination and the phenolic compound characterization in extracts of G. mangostana were investigated. High antioxidant capacity was determined in whole fruit dried extract by ORAC, FRAP and ABTS • + assays. The values obtained by FRAP, ORAC and ABTS assays were 1222 and 4088 and 3590 μM TE/g, respectively. Phenolic compound identification in these extracts was carried out by capillary electrophoresis coupled to ionization by electrospray-mass spectrometry (CE-ESI-MS) with a time of flight analyzer (Micro TOF), and a sensible, fast and efficient method was developed. The CE-ESI parameters were optimized to obtain good separation and suitable sensitivity. The CE parameters were: 80 mM ammonium acetate, pH 10.5, 30 kV, 15 s for injection and fused-silica capillary of 50 ȝm i.d. and 100 cm in length. The ESI-MS parameters were also optimized: drying gas flow of 4L/min, 300°C, nebulization gas pressure at 4 psi, sheath liquid composition and flow (60:40) isopropanol/water + 0.1% triethylamine to 0.18 mL/h. Spectrometric determination was achieved in negative polarity and the mass range was between 100-800 m/z. Considering the scarcity of commercial standards and the scanty bibliography references, some of the most important xanthones from G. mangostana fruit have been identified using CE-ESI-MS (micro TOF), such as Garcinine C, Garcinone E, Mangostenone C and beta-mangostin.
Reservorio, captación, linea de conducción
Gender & History, 2018
This presentation illustrates and recalls some basic regulatory steps and major cultural changes which led to the present recognition of the personal data’s value as a part of the current information assets in the present information society. It also recalls the legal instruments that have been until now developed in order to protect personal data. Secondly, this presentation stresses the GDPR’s characteristics and its central role as a global answer to the current need of sustainable development of fast growing technological dynamics as well as a successful instrument in balancing the interaction between the fundamental rights of human person. Questa presentazione in primo luogo esemplifica, ripercorrendoli, i passaggi normativi e culturali che hanno portato all’attuale riconoscimento del valore del dato personale quale componente del patrimonio informativo circolante nella società dell’informazione, ricordando gli strumenti giuridici sinora approntati per la relativa tutela. In seconda battuta, puntualizza le caratteristiche che consentono al GDPR di assumere il ruolo di risposta globale alla moderna esigenza di sviluppo sostenibile delle dinamiche tecnologiche in rapida espansione, e dunque di strumento efficace di bilanciamento dell’interazione tra diritti fondamentali della persona umana.
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