Search results for "Role"
showing 10 items of 1994 documents
Roles, actitudes y estereotipos de género en Italia
2017
Introducción La investigación realizada se ha centrado en conocer el sexismo, los roles y los estereotipos de género, las actitudes hacia la mujer y el hombre, así como variables sobre el uso del tiempo, como horas dedicadas a las tareas domésticas, al cuidado de los otros, a los amigos y a los hobbies, en variables como el género, la edad y el estatus de estudiante. Para ello se ha llevado a cabo en primer lugar, una revisión teórica sobre la legislación en materia de género abordando desde el contexto internacional, hasta el más próximo ya centrado en Italia, y en ocasiones comparándolo con la legislación española para tratar de encontrar similitudes y diferencias entre ambas. Hemos compr…
Esteroles en leche humana y preparados para lactantes
2018
La leche humana (LH) es el alimento exclusivo durante los primeros 4 - 6 meses de vida del lactante. La lactancia materna se relaciona con beneficios para la salud del lactante a corto y largo plazo. En el caso de no poder acceder a la LH, se recurre a los preparados para lactantes (PL). Los esteroles son compuestos bioactivos presentes en la fracción lipídica de LH y PL. El colesterol (esterol principal en la LH) participa en la formación de tejidos, es componente estructural de las células y precursor de hormonas, vitamina D y sales biliares. Se ha relacionado la mayor ingesta de colesterol por parte de los lactantes alimentados con LH con menor colesterolemia en la vida adulta, en compar…
The fumarolic CO2 output from Pico do Fogo volcano (Cape Verde)
2020
The Pico do Fogo volcano, in the Cape Verde Archipelago off the western coasts of Africa, has been the most active volcano in the Macaronesia region in the Central Atlantic, with at least 27 eruptions during the last 500 years. Between eruptions fumarolic activity has been persisting in its summit crater, but limited information exists for the chemistry and output of these gas emissions. Here, we use the results acquired during a field survey in February 2019 to quantify the quiescent summit fumaroles' volatile output for the first time. By combining measurements of the fumarole compositions (using both a portable Multi-GAS and direct sampling of the hottest fumarole) and of the SO2 flux (u…
Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island
2006
[1] Sulfur speciation in volcanic gases is a potentially valuable tracer of degassing processes at volcanoes. Hitherto, observations of sulfur speciation in volcanic gas plumes have however been limited both in number and quality. Here, we report on periodic measurements of SO2 to H2S proportions in the volcanic gases from La Fossa volcano (Vulcano Island) performed during 2004–2006, a period which encompasses two heating events of the fumarolic field in January–April 2005 and December 2005. Results indicate a systematic relative increase (by a factor of 2–6) of SO2 to H2S proportions in the fumaroles during the heating events, which we ascribe to a temperature increase in the mixing zone b…
Chemical mapping of a fumarolic field: La Fossa Crater, Vulcano Island (Aeolian Islands, Italy)
2005
[1] The performance of a newly-developed portable gas analyzer, capable of real-time measurement of CO2, SO2 and H2S concentrations in volcanic gases, was tested at La Fossa Crater, Vulcano Island. The gas analyzer was used to acquire about 3000 determinations over the fumarolic field, allowing the definition of its chemical structure and heterogeneity. Our high-resolution analysis reveals that, in December 2004, the La Fossa fumarolic field was characterized by an oxidized inner core (SO2/H2S ratios of ∼3), and by more reducing conditions on its northern edge (SO2/H2S ratios of ∼1; range: 0.2–3.3). CO2/(SO2+H2S) molar ratios averaged 35 ± 21, with overlapping compositions for rim and inner…
First multi-GAS based characterisation of the Boiling Lake volcanic gas (Dominica, Lesser Antilles)
2013
We used a Multi-component Gas Analyser System (Multi-GAS) to measure, for the very first time, the composition (H2O, CO2, H2S, SO2) of the volcanic gas plume issuing from the Boiling Lake, a vigorously degassing, hot (T ~ 80-90°C) volcanic lake in Dominica, West Indies. The Multi-GAS captured in-plume concentrations of H2O, CO2 and H2S were well above those typical of ambient atmosphere, while no volcanic SO2 was detected (<0.05 ppm). These were used to derive the Boiling Lake plume characteristic ratios of CO2/H2S (5.2±0.4) and H2O/CO2 (31.4±6). Assuming that other volcanic gas species (e.g., HCl, CO, H2, N2, etc.) are absent in the plume, we recalculated a (air-free) composition fo…
. New ground-based lidar enables volcanic CO2 flux measurements
2015
AbstractThere have been substantial advances in the ability to monitor the activity of hazardous volcanoes in recent decades. However, obtaining early warning of eruptions remains challenging, because the patterns and consequences of volcanic unrests are both complex and nonlinear. Measuring volcanic gases has long been a key aspect of volcano monitoring since these mobile fluids should reach the surface long before the magma. There has been considerable progress in methods for remote and in-situ gas sensing, but measuring the flux of volcanic CO2—the most reliable gas precursor to an eruption—has remained a challenge. Here we report on the first direct quantitative measurements of the volc…
Synthesis and Antiproliferative Activity of 2,5-bis(3′-Indolyl)pyrroles, Analogues of the Marine Alkaloid Nortopsentin
2013
2,5-bis(3′-Indolyl)pyrroles, analogues of the marine alkaloid nortopsentin, were conveniently prepared through a three step procedure in good overall yields. Derivatives 1a and 1b exhibited concentration-dependent antitumor activity towards a panel of 42 human tumor cell lines with mean IC50 values of 1.54 μM and 0.67 μM, respectively. Investigating human tumor xenografts in an ex-vivo clonogenic assay revealed selective antitumor activity, whereas sensitive tumor models were scattered among various tumor histotypes.
‘School, family and then hockey!’ Coaches’ views on dual career in ice hockey
2017
Despite the extensive research into coaches’ roles in supporting athletic development and motivation for sport, few studies have examined coaches’ attitudes and practices towards athletes’ dual careers. The present study extends European research into athletes’ dual careers by examining Finnish ice hockey coaches’ attitudes and practices surrounding players’ education. Ten male coaches aged 27–52 participated in semi-structured interviews. The data were analysed with an existential-narrative theoretical framework and with thematic and structural narrative analysis. Three composite vignettes were created entitled ‘supporting athletic development and players in reaching their own goals’, ‘enj…
Aby odzyskać zdrowie, złóż ofiarę w świątyni. Mechanika uzdrowień i punktów życia w grach fabularnych
2019
Pen and paper RPGs are on the rise once morę, after two decades of continuus decline, and as morę and morę important they become in the gaming media as a whole, it is important to look at their approach towards narrative and gamę design. One of the most difficult things to do in tabletop RPG design is simulating the process of getting wounded and then healed. As heroes of this games tend to participate in rather dangerous adventures, wounds are in- evitable and so is attending to them. Different games have different Solutions for presenting them, and as I presented in the paper, those approaches can be seen by their devotion towards realism or clean mathematics of gamę mechanics. As strange…