Papers actancials i papers temàtics en la novel·la negra de Manuel de Pedrolo

El present estudi ofereix una anàlisi de la recepció crítica de l’obra Crim de Germania, de l’escriptor valencià Josep Lozano, publicada per primera vegada a l’abril de 1980 per l’editorial Tres i Quatre, que permet fixar els elements a l’entorn dels quals s’ha anat elaborant la lectura de la novel·la i la seua evolució temporal. Durant més de trenta anys, Crim de Germania ha sigut objecte de nombroses valoracions crítiques a la premsa i en publicacions periòdiques de diversa índole a tot arreu dels territoris de parla catalana. L’estudi s’ha dividit en tres etapes: la primera s’inicia amb la publicació del llibre i conclou l’any 1981; la segona comprén el período des de 1982 fins al 2004, i, la tercera, des de 2005 —any en què la novel·la s’amplia i es reedita per Bromera— fins l’actualitat.

Una eina per a l’escriptura extensiva i l’argumentació: el diari de lectura

L’article versa sobre les possibilitats de treball de l’escriptura a Batxillerat a partir d’una seqüència didàctica per a l’elaboració d’un diari de lectura, que és un document produït pels alumnes a partir del que els suggereix la lectura d’una obra literària. Tot revisant les bases pedagògiques de la didàctica actual del català quant al procés d’escriptura i el valor de l’argumentació i de la reflexió en l’àmbit educatiu, es pretén que el llibre es convertisca en un estímul per a la creativitat i possibilite l’escriptura extensiva. Així doncs, l’obra literària deixa de ser un element de lectura superficial i pren un caràcter dialògic. El lector esdevé alhora escriptor i, com a tal, s’enfronta a les dificultats i moments de gaudi que aquest fet implica.

Novel Ti/Ta2O5-SnO2 electrodes for water electrolysis and electrocatalytic oxidation of organics

Mixed metal oxide (MMO) electrodes have been applied to different technologies including chlorine production, organic compounds oxidation, water electrolysis, electroplating, etc. due to their catalytic, optical and electronic properties. Most of the existing MMO electrodes contain either toxic metals or precious metals of the platinum group. The aim of this study was to develop environmentally friendly and cost-effective MMO electrodes for water and organic compounds oxidation. Ti/Ta2O5-SnO2 electrodes of different nominal composition were prepared, and electrochemically and physically characterized. For water oxidation, Ti/SnO2 electrode with 5 at.% of Ta produced the highest electroactivity. Ti/SnO2 electrode with 7.5 at.% of Ta showed the best performance for the oxidation of methylene blue (MB). The electrocatalytic activity of the Ti/Ta2O5-SnO2 electrodes increased with the number of active layers. The maximum current of water oxidation reached 3.5 mA at 2.5 V when the electrode was covered with ten layers of Ta2O5. In case of the oxidation of 0.1 mM MB, eight and ten active layers of Ta2O5 significantly increased the electrode activity. The prepared electrodes have been found applicable for both water electrolysis and organic compounds oxidation.

Crystallographic orientation and electrode nature are key factors for electric current generation by Geobacter sulfurreducens

We have investigated the influence of electrode material and crystallographic structure on electron transfer and biofilm formation of Geobacter sulfurreducens. Single-crystal gold - Au(110), Au(111), Au(210) - and platinum - Pt(100), Pt(110), Pt(111), Pt(210) - electrodes were tested and compared to graphite rods. G. sulfurreducens electrochemically interacts with all these materials with different attachment kinetics and final current production, although redox species involved in the electron transfer to the anode are virtually the same in all cases. Initial bacterial colonization was fastest on graphite up to the monolayer level, whereas gold electrodes led to higher final current densities. Crystal geometry showed to have an important influence, with Au(210) sustaining a current density of up to 1442 (± 101) μA cm- 2 at the steady state, over Au(111) with 961 (± 94) μA cm- 2 and Au(110) with 944 (± 89) μA cm- 2. On the other hand, the platinum electrodes displayed the lowest performances, including Pt(210). Our results indicate that both crystal geometry and electrode material are key parameters for the efficient interaction of bacteria with the substrate and should be considered for the design of novel materials and microbial devices to optimize energy production.

Semantic change and intersubjectification: The origin of reprise evidential conditional in Old Catalan

The reprise evidential conditional (REC) is nowadays not very usual in Catalan: it is restricted to journalistic language and to some very formal genres (such as academic or legal language), it is not present in spontaneous discourse. On the one hand, it has been described among the rather new modality values of the conditional. On the other, the normative tradition tended to reject it for being a gallicism, or to describe it as an unsuitable neologism. Thanks to the extraction from text corpora, we surprisingly find this REC in Catalan from the beginning of the fourteenth century to the contemporary age, with semantic and pragmatic nuances and different evidence of grammaticalization. Due to the current interest in evidentiality, the REC has been widely studied in French, Italian and Portuguese, focusing mainly on its contemporary uses and not so intensively on the diachronic process that could explain the origin of this value. In line with this research, that we initiated studying the epistemic and evidential future in Catalan, our aim is to describe: a) the pragmatic context that could have been the initial point of the REC in the thirteenth century, before we find indisputable attestations of this use; b) the path of semantic change followed by the conditional from a ‘future in the past’ tense to the acquisition of epistemic and evidential values; and c) the role played by invited inferences, subjectification and intersubjectification in this change.