In the crystal structure of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)mono(bathophenanthroline)erbium(III), C 57 H 73 -ErN 2 O 6 , the Er 3+ ion is in an antiprismatic environment, surrounded by two N atoms and six O atoms. The β-diketonato ligands show structural disorder. The ac susceptibility studies conducted at frequencies from 33 to 9995 Hz and at temperatures from 1.7 to 10 K revealed that the application of a static [a]

We study nonlinear wave phenomena in coupled ring resonator optical waveguides in the tight coupling regime. A discrete model for the system dynamics is put forward and its steady state nonlinear Bloch modes are derived. The switching behavior of the transmission system is addressed numerically and the results are explained in the light of this analytical result. We also present a numerical study on the spontaneous generation of Bragg solitons from a continuous-wave input.

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Halophytes are gaining considerable attention due to their applications in saline agriculture, phytoremediation, medicine, and secondary metabolite production. This study investigated the bioactive components present in Silene uniflora (sea campion) hydromethanolic extract, and their antimicrobial activity was evaluated both in vitro and ex situ against two strawberry phytopathogens, namely Botrytis cinerea (grey mold) and Colletotrichum nymphaeae (anthracnose fruit rot). The main identified phytochemicals were mome inositol, saturated fatty acid esters, and cyclotetracosane. In vitro tests demonstrated complete inhibition of the growth of B. cinerea and C. nymphaeae at extract concentrations of 1000 and 1500 μg·mL−1, respectively, with an activity comparable to that of fosetyl-Al and substantially higher than that of azoxystrobin. This activity was improved upon conjugation with chitosan oligomers (COS), yielding inhibition values of 750 and 1000 μg·mL−1. The COS-S. uniflora conjugate complexes were then tested as protective treatments for postharvest storage of strawberry fruit, resulting in high protection against artificially inoculated B. cinerea and C. nymphaeae at doses of 3750 and 5000 μg·mL−1, respectively. The reported results open the door to the valorization of this halophyte as a source of biorationals for strawberry protection.

Introduction. In spite of the education reform and the introduction of mixed schools, there are still obstacles to gender equality in Spain. Sexist attitudes and values continue to influence personal development and career choices, limiting women's participation in all areas. The opinions, beliefs, ideas, conceptions, expectations and personal attitudes of teaching professionals exert a great influence on the students who perceive them, which calls for up-to-date information on teaching staff’s perceptions towards gender equality and coeducation.Method. In this work, results from a survey distributed in three Secondary Schools in the Autonomous Community of Madrid, with 105 participants, are presented. The retrieved data were analyzed by using ANOVA and Kruskal-Wallis non-parametric tests.Results. Significant differences were found among the respondents in terms of their views on gender equality for the gender and gender*age factors, and for the gender and years of teaching experience factors in the case of their perceptions about coeducation.Discussion and conclusion. Although the tendency toward a true status of equality was more pronounced in women than in men, an adequate predisposition on the majority of teachers of both sexes towards the achievement of a social equality model based on the promotion of peer roles and coeducational practices was found.