This study aims to evaluate the efficacy of two methods (agitation and ultra-sound) for extracting phenolic compounds from 15 native plants. Plant species collected in the Dehesa of Extremadura were used. The antioxidant, antihypertensive and antimicrobial activity of the phenolic extracts was investigated. Significantly different results were obtained when comparing the two extraction methods, with the highest concentrations of phenolic compounds found for ultrasound extraction. In addition, the extracts obtained for Cistus albidus, Cistus salviifolius, Rubus ulmifolius and Quercus ilex showed the highest concentrations of phenolic compounds. The antioxidant activity was higher in the extracts of Cistus and Q. ilex obtained by ultrasound, as was the antihypertensive activity. Antimicrobial activity was also higher in the extracts obtained by ultrasound from C. salviifolius and Q. ilex plants against bacteria and from Cistus ladanifer against yeasts. Therefore, it can be concluded that, with the ultrasound extraction of phenolic compounds from C. ladanifer, C. albidus and Q. ilex plants, it is possible to obtain extracts with important functional properties, so they could be studied for their use in food with the aim of obtaining healthy and safe products, favouring the sustainability of the environment of the Dehesa Extremeña.

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Desertion from the origo by farmers and decurions was a very frequent phenomenon througohut III and IV centuries. This paper studies the procedure for claiming the fugitives through three imperial constitutions of the 400, 416 and 419 that indicate a homogenous conception about it and clarify some of its main aspects.

Ni el supuesto positivismo de Avendaño, ni su probabilismo ni el casuismo indiano dan una explicación suficiente del empeño puesto por el jesuita en desvirtuar una cédula de Felipe II que ordenaba castigar a los españoles culpables de injurias contra los indios con más rigor que si fuesen ellos víctimas del delito. Tampoco se trata de un caso que se pueda englobar en la práctica del «se acata, pero no se cumple». Lo que en realidad defiende Avendaño, con más palabras que argumentos, es el incumplimiento de la ley.

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