Search results for "Massa"
showing 10 items of 396 documents
Anion-driven encapsulation of cationic guests inside pyridine[4]arene dimers
2019
Pyridine[4]arenes have previously been considered as anion binding hosts due to the electron-poor nature of the pyridine ring. Herein, we demonstrate the encapsulation of Me4N+ cations inside a dimeric hydrogen-bonded pyridine[4]arene capsule, which contradicts with earlier assumptions. The complexation of a cationic guest inside the pyridine[4]arene dimer has been detected and studied by multiple gas-phase techniques, ESI-QTOF-MS, IRMPD, and DT-IMMS experiments, as well as DFT calculations. The comparison of classical resorcinarenes with pyridinearenes by MS and NMR experiments reveals clear differences in their host–guest chemistry and implies that cation encapsulation in pyridine[4]arene…
Chiral self-sorting behaviour of [2.2]paracyclophane-based bis(pyridine) ligands
2019
Two constitutionally isomeric chiral bis(pyridine) ligands based on planar chiral 4,15-difunctionalized [2.2]paracyclophanes were synthesized, the respective enantiomers were separated via HPLC on a chiral stationary phase, and their self-assembly behaviour upon coordination to palladium(ii) ions was studied with regard to chiral self-sorting effects. As proven by NMR spectroscopy, mass spectrometry, CD spectroscopy, UV-Vis spectroscopy and X-ray crystallography both ligands form the expected dinuclear complexes upon coordination to cis-protected di- or tetravalent palladium(ii) ions, respectively, however, with distinct differences concerning their chiral self-sorting ability. peerReviewed
La información en prensa española sobre casos de violencia en parejas del mismo sexo
2016
Los medios de comunicación españoles se han hecho eco de diversos episodios de violencia en parejas del mismo sexo durante los últimos años. Dar cobertura a este fenómeno plantea interrogantes sobre cómo enfocar una realidad que se mantuvo oculta hasta hace muy poco. Metodología. El objetivo de este artículo es realizar un análisis de contenido de la información publicada en diversos diarios españoles entre 2010 y 2015. Resultados. Los resultados indican que, mientras que los periodistas han mejorado el tratamiento de la violencia de género, la información de las agresiones en parejas gays evidencia algunas características similares a las que dominaron las noticias sobre violencia contras l…
The beneficial effects of therapeutic craniofacial massage on quality of life, mental health and menopausal symptoms and body image: A randomized con…
2020
Abstract Objective The objective of this study was to determine the effect of massage in the craniofacial area in menopausal women after the treatment and one month after its completion, and to measure its influence on quality of life in relation to symptoms of menopause, mental health, and body image perception. Design 50 participants with menopause, aged 45–65 years, participated in a single-blind randomized controlled trial. Participants were randomly assigned to two groups: craniofacial massage group (CMG), who received massage treatment (n = 25), and control group (CG), without treatment (n = 25). Prior to randomization, all participants provided demographic and clinical information. Q…
Vox and journalistic information: use and criticism of the media in the 2019 General Election campaigns
2022
The general elections held in 2019 gave Vox enough votes to enter the Spanish Parliament as the third most popular political party. The growing role of this radical right-wing party has revealed a complex relationship with the media. The objective of this study is to characterise the relationship between Vox and the media by analysing the party's electoral discourse using quantitative techniques – posts made on Facebook and Twitter (n = 224) – and qualitative techniques, exploring the framing used in the closing rallies of the campaign. References to the media dominated the messages Vox posted on Twitter during the November campaign, whose main purpose was to repost content previously broad…
Un contributo dell'agricoltura all'ambiente: le agroenergie
2009
La crisi energetica che si sta registrando negli ultimi anni a livello mondiale, determinata da un progressivo esaurimento delle scorte di petrolio e da una crescente richiesta di energia da parte dei Paesi e-mergenti (Cina ed India, in particolare), ha riproposto l’esigenza di ri-correre a fonti alternative. Recenti studi, condotti dalla comunità scientifica, hanno dimostrato che, nel medio-lungo periodo, l’impiego di fonti rinnovabili può af-fiancare l’uso di combustibili fossili o, addirittura, diventarne un’alternativa. Tra queste, particolare importanza per il settore energetico siciliano assumono le cosiddette “agroenergie”, espressione di un’agricoltura multifunzionale legata non sol…
Co-educar la mirada contra los estereotipos de género en TV
2008
TV serials analyzed in this paper show a representation of stereotyped gender. These cultural products, despite its apparent modernity, reproduce inequalities in the representation of the feminine and masculine through gender stereotypes which are sexist models for the construction of gender identity among its young viewers. Besides, a gender and co-education approach for an audiovisual alphabetization should be a good way against inequality. Se analizan en este trabajo un conjunto de series de televisión que plantean una representación estereotípica de los géneros. Pese a su aparente modernidad, múltiples productos culturales-televisivos siguen siendo portadores de discursos que reproducen…
El futuro como farsa: impotencia reflexiva y repetición de la historia en la distopía mainstream contemporánea.
2023
Con el paso del tiempo, las distopías han acabado por constituirse como una de las formas predilectas a la hora de abordar la crítica a la realidad. En el siglo xxi atendemos a un nuevo auge del género, en el que la relación entre crisis y distopía se ha vuelto aún más evidente. Las amenazas que se ciernen sobre nuestros tiempos (entre las que destacan los conflictos bélicos, la crisis económica, la emergencia ecológica y el auge de los populismos de derechas), se plasman en estas distopías a través de imágenes como las de las ruinas o los totalitarismos. Así, y bajo la máxima de la repetición de la historia, las distopías recurren al pasado del mundo occidental como forma de aleccionarnos …
Shaping public Opinion for confrontation : catalan independence claims as represented in spanish, catalan, valencian, and basque editorials
2017
Editorials represent a newspaper’s principal means of ideological positioning and serve to identify the attitude of each newspaper and its readership to some of the main actors in any given conflict, especially those that are political in nature. Catalonia’s independence movement has experienced a surge in recent years. The turning point came in July 2010, after Spain’s constitutional court ruled against some aspects of Catalonia’s Statute of Autonomy (the legislation regulating the relationship between the Catalan autonomous community and the Spanish state). The ruling annulled some of the articles of the statute. The demonstration in support of Catalan independence that took place on Sep…
The Biosynthesis of Rare Homo-Amino Acid Containing Variants of Microcystin by a Benthic Cyanobacterium
2019
Microcystins are a family of chemically diverse hepatotoxins produced by distantly related cyanobacteria and are potent inhibitors of eukaryotic protein phosphatases 1 and 2A. Here we provide evidence for the biosynthesis of rare variants of microcystin that contain a selection of homo-amino acids by the benthic cyanobacterium Phormidium sp. LP904c. This strain produces at least 16 microcystin chemical variants many of which contain homophenylalanine or homotyrosine. We retrieved the complete 54.2 kb microcystin (mcy) gene cluster from a draft genome assembly. Analysis of the substrate specificity of McyB1 and McyC adenylation domain binding pockets revealed divergent substrate specificity …