Antioxidant activity and α-glucosidase inhibition by essential oils from Hertia cheirifolia (L.).

Essential oils from Hertia cheirifolia L. were evaluated for antioxidant activities by the 1,1-diphényl-2-picrylhydrazyl (DPPH), reducing power and carotene/linoleic acid and inhibitory properties against-glucosidase. The essential oils (EOs) have been analyzed by gas chromatography (GC) and gaschromatography–mass spectrometry (GC–MS). Chemical analyses showed that the EOs were rich interpenes. -Pinene was identified as major component in H. cheirifolia essential oils.Studies on kinetic behavior of the EOs showed that the oils of this species were non-competitiveinhibitors and the flowers oil exhibited a strong -glucosidase inhibitory activity with IC50value of0.24 ± 0.01 mg/mL. These results show that H. cheirifolia could be a natural source of potent antioxidantsand -glucosidase inhibitors

The External Tanger Unit (Intrarif sub-Domain, External Rifian Zones, Morocco): an interdisciplinary study

The External Tanger Unit represents one of the most complete Cretaceous-Miocene successions in the central areas of the Internal Intrarif sub-Domain (External Rif Zones, Morocco). An interdisciplinary study has been carried out to propose a new characterization of this unit which would allow a better comprehension of the confused and complex relationships among different units of the same sub-domain. The results achieved can be summarized as follows: (1) redefinition of the stratigraphic (litho-, bio-, and chrono-) record and introduction of a new, informal lithostratigraphic terminology; (2) recognition of two main depositional sequences (lower-middle Eocene p.p. and lower Oligocene p.p.-lower Miocene p.p.) separated by extended gaps (latest Cretaceous-early Eocene p.p. and middle Eocene p.p.-early Oligocene p.p.); (3) reconstruction of the evolution of the sedimentary realm, and of the relationships between tectonics and sedimentation; and (4) comparison between the upper Cretaceous-Miocene stratigraphic record and tectonic events of the Intrarif, which is located in the western external portion of the Maghrebian Flysch Basin, and the equivalent sedimentary record of the eastern portion of this basin in the Tunisian Tell. More in general, our results allowed (i) a first reconstruction of the Cretaceous-Miocene main tectono-sedimentary events; (ii) a more detailed location of the sedimentary suite in the external African Margin in the context of a wider palaeogeographic framework; and (iii) the definition of the main stages of the geological evolution of the area.Research supported by: Research Project CGL2016-75679-P, Spanish Ministry of Education and Science; Research Groups and Projects of the Generalitat Valenciana, Alicante University (CTMAIGA); Research Group RNM 146, Junta de Andalucía; grants from the University of Urbino Carlo Bo, responsible M. Tramontana