221 research outputs found

    The Global Novel, Gendered Trauma and Transmedia Perspectives: "My Brilliant Friend", "Americanah" and "The Handmaid’s Tale"

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    In this paper, I will present a constellation of three contemporary women writers, three novels and two connected TV series: Elena Ferrante with her My Brilliant Friend cycle (2011-2014), and the homonymous TV series (2018-2022, three seasons directed by Saverio Costanzo, Alice Rohrwacher, and Daniele Lucchetti); Americanah (2013) by Nigerian Chimamanda Ngozi Adichie, and Adichie’s representation of blog inside and outside this novel; The Handmaid’s Tale (1985) by Canadian Margaret Atwood, analyzed from the perspective of the TV series (five seasons directed by Bruce Miller, aired between 2017 and 2022). I will situate this overall constellation in the context of the Global Novel as well as in a transmedia context: two global languages furthermore unified by the common field of contemporary «primordialism» (Appadurai, 140), a gendered trauma of late-modernity. From this shared perspective, I will then focus on the narrative and visual mechanisms of trauma in the three novels and the two TV series.In this paper, I will present a constellation of three contemporary women writers, three novels and two connected TV series: Elena Ferrante with her My Brilliant Friend cycle (2011-2014), and the homonymous TV series (2018-2022, three seasons directed by Saverio Costanzo, Alice Rohrwacher, and Daniele Lucchetti); Americanah (2013) by Nigerian Chimamanda Ngozi Adichie, and Adichie’s representation of blog inside and outside this novel; The Handmaid’s Tale (1985) by Canadian Margaret Atwood, analyzed from the perspective of the TV series (five seasons directed by Bruce Miller, aired between 2017 and 2022). I will situate this overall constellation in the context of the Global Novel as well as in a transmedia context: two global languages furthermore unified by the common field of contemporary «primordialism» (Appadurai, 140), a gendered trauma of late-modernity. From this shared perspective, I will then focus on the narrative and visual mechanisms of trauma in the three novels and the two TV series

    Characterization and activity test of commercial Ni/Al2O3, Cu/ZnO/Al2O3 and prepared NieCu/Al2O3 catalysts for hydrogen production from methane and methanol fuels

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    In this study, methane and methanol steam reforming reactions over commercial Ni/Al2O3, commercial Cu/ZnO/Al2O3 and prepared NieCu/Al2O3 catalysts were investigated. Methane and methanol steam reforming reactions catalysts were characterized using various techniques. The results of characterization showed that Cu particles increase the active particle size of Ni (19.3 nm) in NieCu/Al2O3 catalyst with respect to the commercial Ni/ Al2O3 (17.9). On the other hand, Ni improves Cu dispersion in the same catalyst (1.74%) in comparison with commercial Cu/ZnO/Al2O3 (0.21%). A comprehensive comparison between these two fuels is established in terms of reaction conditions, fuel conversion, H2 selectivity, CO2 and CO selectivity. The prepared catalyst showed low selectivity for CO in both fuels and it was more selective to H2, with H2 selectivities of 99% in methane and 89% in methanol reforming reactions. A significant objective is to develop catalysts which can operate at lower temperatures and resist deactivation. Methanol steam reforming is carried out at a much lower temperature than methane steam reforming in prepared and commercial catalyst (275-325 o C). However, methane steam reforming can be carried out at a relatively low temperature on NieCu catalyst (600-650 o C) and at higher temperature in commercial methane reforming catalyst (700-800 o C). Commercial Ni/Al2O3 catalyst resulted in high coke formation (28.3% loss in mass) compared to prepared NieCu/Al2O3 (8.9%) and commercial Cu/ZnO/Al2O3 catalysts (3.5%).Web of Scienc

    Juglans regia L., phenotypic selection and assessment of genetic variation within a simulated seed orchard

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    Noble hardwoods are very important for the Italian furniture industry. Since 1985, approximately 170,000 ha have been planted in Italy with noble hardwoods. Among them, about 50% of species are represented by walnuts. Walnut (Juglans regia L.), not native in Italy, has been the focus of a substantial research effort for breeding and improvement programmes. The priority has been to preserve the in situ genetic resource still existing after intensive felling. Phenotypes suitable for timber production showing important traits such as straight stem, nice branch architecture, dominance and adaptation (phenology) have needed to be developed and selected. In order to reach this goals, selection of valuable progenies and the evaluation of the interaction genotype x environment, methods based essentially on a multi-trait Selection Index, were developed. Studies have been undertaken also to measure the variation of phenological traits, more correlated to traits valuable for architecture; in addition, neutral markers were used to assess genetic variation among different intensities of the adopted selections. The individual genetic component was found to be higher than at the inter-population level. Results showed that a hypothetical seed orchard made with progenies selected by morphology, phenology and genetic traits could provide material with a good performance and supply a variability similar to larger populations as the total plantation or the pseudo-natural system chosen for comparison

    Design of nanostructured catalysts for H2 production and CO2 hydrogenation.

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    2006/2007In a sustainable energy economy, hydrogen will become very important as it is considered one of the key energy carriers in terms of energy content, as fuel for transportation and intermediate in the conversion of renewable energy sources. The aim of this work was the design of novel catalysts for hydrogen production from both methane and methanol- ethanol/water streams. Special interest was also focused on the CO2 hydrogenation reaction, as a potential chemical route to its valorization to mitigate its greenhouse effect. Active catalysts, resistant to the sinterization under severe reaction conditions, were developed through a simple and low cost synthetic route, which was based on the encapsulation of pre-formed Rh nanoparticles into porous oxides. This procedure reduces the mobility of the metal particles at high temperature. The embedded catalysts, tested for the methane partial oxidation, presented higher thermal stability with respect to a reference catalyst obtained by conventional incipient wetness impregnation. In order to obtain a better understanding of the interaction between Rh nanoparticles and the alumina support in the embedded catalysts, an X-Ray Photoelectron Spectroscopy (XPS) study on three model embedded Rh systems was performed. The extension of the embedding approach to Ni/Cu-based systems was also handled. In addition, Ni(x%)Cu(y%)/Al2O3 catalysts with different Ni and Cu contents were synthesized using the conventional impregnation method. All the samples were tested towards the partial oxidation of methane and the steam reforming of methanol and ethanol. Neither copper nor nickel alone supported on alumina appeared as suitable catalysts for ethanol steam-reforming at low temperatures (T < 500 °C). The activity of the bimetallic systems, during the first run-up experiment, is not very different from the monometallic Ni system. Furthermore, the Ni:Cu ratio does not seem to affect the product distribution. Notably, the bimetallic systems show promising catalytic activity in the methanol steam reforming. Finally, the formation of metal alloys between Cu and Ni, after high temperature reduction, leads to a strongly reduction of coke deposition under methane partial oxidation conditions, increasing the life-time of the catalyst. On Ni(x%)Cu(y%)/Al2O3 samples, CO2 hydrogenation was also investigated. All catalysts did not show the ability to activate the CO2 molecule, as well as the corresponding unsupported systems. No CO was observed if hydrogen was not introduced into the stream. These results are in good agreement with the data obtained on Ni single crystal (Ni(110)), under UHV conditions. In this case, stable hydrogenation intermediates/products were observed during the reaction by means of X-Ray Photoelectron Spectroscopy (XPS), Temperature Programmed Desorption (TPD) experiments and High Resolution Electron Energy Loss Spectroscopy (HREELS) in the -180/230 °C temperature range. The evolution of the surface species and concentrations as a function of the annealing temperature were examined. This work was supported by parallel DFT calculations, in order to model both experimentally and theoretically the CO2 hydrogenation reaction.In vista di uno sviluppo energetico sostenibile, l’idrogeno diverrà molto importante in quanto è considerato uno dei vettori energetici chiave in termini di contenuto energetico, quale combustibile per celle a combustibile nel settore dei trasporti e quale intermedio nella conversione delle fonti rinnovabili. Lo scopo del presente lavoro è stato quello di sviluppare nuovi catalizzatori per la produzione di idrogeno sia a partire da metano che da soluzioni metanolo-etanolo/acqua. Particolare attenzione è stata anche rivolta alla reazione di idrogenazione della CO2, quale potenziale via chimica per la valorizzazione della molecola e strumento per mitigare l’ effetto serra legato alle emissioni antropiche di anidride carbonica. Sono stati sviluppati catalizzatori attivi e resistenti alla disattivazione che altrimenti avviene normalmente durante le drastiche condizioni di reazione. Attraverso una metodologia di sintesi semplice e a basso costo, sono state inglobate nanoparticelle di Rh pre-formate all’interno di un ossido poroso, al fine di ridurre la mobilità ad alta temperatura delle particelle di metallo e quindi di prevenire la sinterizzazione della fase attiva. I catalizzatori così preparati (Rh(1%)@Al2O3) e testati nell’ossidazione parziale del metano, hanno mostrato una stabilità termica superiore rispetto all’analogo sistema preparato mediante la classica tecnica di impregnazione. Al fine di comprendere meglio l’interazione delle nanoparticelle di Rh con il supporto nei sistemi embedded, è stato condotto uno studio mediante spettroscopia di fotoemissione (XPS) su tre sistemi modello. E’ stata studiata la possibilità di estendere tale approccio a metalli non nobili, quali Ni e Cu. Per confronto, sono stati sintetizzati mediante classica impregnazione, catalizzatori Ni(x%)Cu(y%)/Al2O3 con contenuto di Ni e Cu differente. Sono state studiate le reazioni di steam reforming del metanolo e etanolo, e di ossidazione parziale del metano. Sia il rame che il nichel supportati su Al2O3 non si sono dimostrati dei catalizzatori adatti per lo steam reforming dell’etanolo a bassa temperatura (T < 500 °C). Inoltre, l’attività dei sistemi bimetallici non risulta apprezzabilmente differente da quella dei corrispondenti campioni monometallici. Il rapporto molare Ni:Cu non sembra influenzare la distribuzione dei prodotti. L’attività dei sistemi bimetallici si è invece dimostrata promettente nel caso dello steam reforming del metanolo. La formazione di una lega tra Ni e Cu in seguito a riduzione ad alta temperatura, riduce la formazione di coke durante l’ossidazione parziale del metano, portando a un significativo miglioramento del tempo di vita del catalizzatore. E’ stata infine studiata l’idrogenazione della CO2 sui campioni Ni(x%)Cu(y%)/Al2O3. Tutti i campioni non si sono mostrati abili nell’attivare la molecola. Analogo comportamento è stato riscontrato sui corrispondenti sistemi non supportati. Infatti, non si osserva alcun prodotto di reazione / decomposizione a bassa / media temperatura a meno che l’idrogeno non sia contemporaneamente presente. Tali risultati sono in perfetto accordo con i dati ottenuti sulla superficie di un cristallo singolo Ni(110) in condizioni di ultra alto vuoto. In questo caso, stabili intermedi di idrogenazione sono stati individuati durante la reazione tramite la spettroscopia di fotoemissione (XPS), il desorbimento a temperatura programmata (TPD) e la spettroscopia vibrazionale (HREELS) nell’intervallo di temperatura -180/230 °C. L’evoluzione delle specie coinvolte e la loro concentrazione in funzione della temperatura è stata anche analizzata. Questo lavoro è stato supportato da calcoli DFT al fine di modellizzare sia sperimentalmente che teoreticamente la reazione di idrogenazione della CO2.XX Ciclo197

    Historia della perdita e riacquisto della Spagna occupata da mori : parte quinta

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    Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2007Sign. : A-T<12

    Historia della perdita e riacquisto della Spagna occupata da Mori : parte sesta

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    Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2007Sign.: []\p3\s, A-Y\p12\s, Z\p7\sPort. enmarcad

    Messa a punto di un metodo per l'individuazione di β-1,3- glucanasi e chitinasi attraverso Native PAGE su estratti di piante di Prunus avium L. inoculate con Phytophthora spp.

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    Tecnique to detect on ß-1,3- glucanase and chitinasi by native PAGE, in Prunus avium (L.)clones inoculated with Phytophthora spp. ß-1,3-glucanase and chitinase activities have been detected by native PAGE (poliacrylamide gel electrophoresis) on leaf extracts of wild cherry (P. avium) inoculated with different species of Phytophthora spp.. These pathogens are aggressive in wild cherry and they can cause wiltings and death of the plant. These two PR (pathogen-related) proteins are normally produced by plants as first resistance strategy towards pathogens. The PR activities are involved in ifal cell wall degradation and growth. Usually, the techniques to detect them are based on colorimetric assay performed with the total protein extracts or in the poliacrylamide gels, through expensive procedures. In this work a direct colorimetric detection on a Carboximetil (cm)-Curdlan RBB (Remazol Brilliant Blu) and Glycol Chitosan substrate, is used to reveal ß-1,3-glucanase and chitinasi respectively. This protocol resulted to be very sensible in detecting the two proteins, very simply, reliable and cheap

    Historia della perdita e riacquisto della Spagna occupata da mori : parte quarta

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    Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2007Sign.: A-T\p12\s, V\p8\sPort. enmarcad

    Messa a punto di un metodo per l'individuazione di β-1,3- glucanasi e chitinasi attraverso Native PAGE su estratti di piante di Prunus avium L. inoculate con Phytophthora spp.

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    Tecnique to detect on ß-1,3- glucanase and chitinasi by native PAGE, in Prunus avium (L.)clones inoculated with Phytophthora spp. ß-1,3-glucanase and chitinase activities have been detected by native PAGE (poliacrylamide gel electrophoresis) on leaf extracts of wild cherry (P. avium) inoculated with different species of Phytophthora spp.. These pathogens are aggressive in wild cherry and they can cause wiltings and death of the plant. These two PR (pathogen-related) proteins are normally produced by plants as first resistance strategy towards pathogens. The PR activities are involved in ifal cell wall degradation and growth. Usually, the techniques to detect them are based on colorimetric assay performed with the total protein extracts or in the poliacrylamide gels, through expensive procedures. In this work a direct colorimetric detection on a Carboximetil (cm)-Curdlan RBB (Remazol Brilliant Blu) and Glycol Chitosan substrate, is used to reveal ß-1,3-glucanase and chitinasi respectively. This protocol resulted to be very sensible in detecting the two proteins, very simply, reliable and cheap

    Ni-based bimetallic heterogeneous catalysts for energy and environmental applications

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    Bimetallic catalysts have attracted extensive attention for a wide range of applications in energy production and environmental remediation due to their tunable chemical/physical properties. These properties are mainly governed by a number of parameters such as compositions of the bimetallic systems, their preparation method, and their morphostructure. In this regard, numerous efforts have been made to develop “designer” bimetallic catalysts with specific nanostructures and surface properties as a result of recent advances in the area of materials chemistry. The present review highlights a detailed overview of the development of nickel-based bimetallic catalysts for energy and environmental applications. Starting from a materials science perspective in order to obtain controlled morphologies and surface properties, with a focus on the fundamental understanding of these bimetallic systems to make a correlation with their catalytic behaviors, a detailed account is provided on the utilization of these systems in the catalytic reactions related to energy production and environmental remediation. We include the entire library of nickel-based bimetallic catalysts for both chemical and electrochemical processes such as catalytic reforming, dehydrogenation, hydrogenation, electrocatalysis and many other reactions
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