Resumen La interrupción como elemento de transformación ha tenido distintos efectos a lo largo del tiempo. En la actualidad la interrupción de mayo del 68 no es solamente la más cercana en el tiempo, sino que es aquella que mejor revela sus efectos en el presente actual. La individualización que representó continúa siendo el elemento configurador del motor de institucionalización que las sociedades occidentales viven. De ahí que concepciones como la democracia emergente e institucional puedan ser revividas en la actualidad a partir de fenómenos como los indignados, las primaveras árabes, o los más recientes como los acontecido en Cataluña en 2017 y los actuales procesos en Colombia y Chile.

Abstract Interruption as an element of transformation has had different effects over time. Currently, the interruption of May 68 is not only the closest in time, but it is also the one that best reveals its effects in the current present. The individualization that it represented continues to be the configuring element of the institutionalization engine that Western societies experience. Therefore, conceptions such as emerging and institutional democracy can be revived today based on phenomena such as the indignados, the Arab springs, or some more recent ones, such as those that occurred in Catalonia in 2017 and the current processes in Colombia and Chile.

This paper proposes an innovative approach to determine the composition of natural rubber (NR) and styrene butadiene rubber (SBR) blends from the analysis of the data provided by the differential scanning calorimetry (DSC) technique. DSC registers are post-processed, based on a multivariate chemometric approach, consisting in the application of the successive projections algorithm (SPA) as variable selection algorithm and a further application of the partial least squares (PLS) regression method and the leave-one-out cross-validation algorithm. Results attained by applying this approach are compared with those obtained from mid-infrared spectroscopy since this last method has been widely applied during the last decades. Experimental results summarized in the paper prove that this fast and cost-effective approach is useful to determine the composition of unknown incoming NR/SBR blends.

The novelty of the present study relies on the straightforward sonication of ZnO and TiO2 and incorporation to a complex formulation of latex, with other several organic-inorganic additives that influences the cross-linking reactions. The new elastomer with particles carefully sonicated exhibit improved electrical and mechanical properties. Strong interaction among the nanoparticles and the polymer amorphous phase has been proved by means of FTIR, SEM and XRD analyses. The synergistic effect of hybrid fillers with nanometric dimensions can be used to design high-performance natural rubber nanocomposites with enhanced electrical resistance and good cross-linking degree.

Objectives: Ayahuasca (AYA), a natural psychedelic brew prepared from Amazonian plants and rich in dimethyltryptamine (DMT) and harmine, causes effects of subjective well-being and may therefore have antidepressant actions. This study sought to evaluate the effects of a single dose of AYA in six volunteers with a current depressive episode. Methods: Open-label trial conducted in an inpatient psychiatric unit. Results: Statistically significant reductions of up to 82% in depressive scores were observed between baseline and 1, 7, and 21 days after AYA administration, as measured on the Hamilton Rating Scale for Depression (HAM-D), the Montgomery-Åsberg Depression Rating Scale (MADRS), and the Anxious-Depression subscale of the Brief Psychiatric Rating Scale (BPRS). AYA administration resulted in nonsignificant changes in Young Mania Rating Scale (YMRS) scores and in the thinking disorder subscale of the BPRS, suggesting that AYA does not induce episodes of mania and/or hypomania in patients with mood disorders and that modifications in thought content, which could indicate psychedelic effects, are not essential for mood improvement. Conclusions: These results suggest that AYA has fast-acting anxiolytic and antidepressant effects in patients with a depressive disorder.

In this paper we try to recover, for the political history of Spanish philosophy, the polemic between Manuel Sacristán and Gustavo Bueno, which started at the beginning of 1968. From this historical perspective they propose finally some suggestive reflections on the current importance of the polemic.

En este escrito se pretende recuperar, para la historia política de la filosofía española, la polémica desatada, en los albores de 1968, entre Manuel Sacristán y Gustavo Bueno. A partir de esta línea histórica se proponen al final algunas reflexiones sugerentes sobre la actualidad de la polémica.