Continuous spectra in high-harmonic generation driven by multicycle laser pulses

We present observations of the emission of XUV continua in the 20-37 eV region by high harmonic generation (HHG) with $4$-$7\ \mathrm{fs}$ pulses focused onto a Kr gas jet. The underlying mechanism relies on coherent control of the relative delays and phases between individually generated attosecond pulse, achievable by adjusting the chirp of the driving pulses and the interaction geometry. Under adequate negative chirp and phase matching conditions, the resulting interpulse interference yields a continuum XUV spectrum, which is due to both microscopic and macroscopic (propagation) contributions. This technique opens the route for modifying the phase of individual attosecond pulses and for the coherent synthesis of XUV continua from multicycle driving laser pulses without the need of an isolated attosecond burst.Comment: 14 pages, 5 figures. Submitted to Physical Review

Born in the Mediterranean: Comprehensive Taxonomic Revision of Biscutella ser. Biscutella (Brassicaceae) Based on Morphological and Phylogenetic Data

Biscutella L. ser. Biscutella (= Biscutella ser. Lyratae Malin.) comprises mostly annual or short-lived perennial plants occurring in the Mediterranean basin and the Middle East, which exhibit some diagnostic floral features. Taxa in the series have considerable morphological plasticity, which is not well correlated with clear geographic or ecologic patterns. Traditional taxonomic accounts have focused on a number of vegetative and floral characters that have proved to be highly variable, a fact that contributed to taxonomic inflation mostly in northern Africa. A detailed study and re-evaluation of morphological characters, together with recent phylogenetic data based on concatenation of two plastid and one nuclear region sequence data, yielded the basis for a taxonomic reappraisal of the series. In this respect, a new comprehensive integrative taxonomic arrangement for Biscutella ser. Biscutella is presented in which 10 taxa are accepted, namely seven species and three additional varieties. The name B. eriocarpa DC. is reinterpreted and suggested to include the highest morphological variation found in northern Morocco. Its treatment here accepts two varieties, one of which is described as new (B. eriocarpa var. riphaea A. Vicente, M. Á. Alonso & M. B. Crespo). In addition, the circumscriptions of several species, such as B. boetica Boiss. & Reut., B. didyma L., B. lyrata L., and B. maritima Ten., are revisited. Nomenclatural types, synonymy, brief descriptions, cytogenetic data, conservation status, distribution maps, and identification keys are included for the accepted taxa, with seven lectotypes and one epitype being designated here.The FPU grant program (Mº de Educación, Cultura y Deporte, Spanish Government) is kindly thanked for supporting A. V. This research was partly supported by the I+D+i research project CGL2011-30140 from Dirección General de Investigación, MICINN (Ministerio de Economía y Competitividad, Spanish Government), and the grants ACIE13–08, ACIE14–01, ACIE17–01, ACIE18–03, and PPI-2015 from the University of Alicante

Reinstatement of Squilla Steinh., a priority name against the illegitimate Charybdis Speta (Hyacinthaceae, Urgineoideae)

Squilla Steinh. was considered to be an orthographic variant of Scilla L., and therefore the new genus Charybdis Speta was created to include Scilla maritima L. and related taxa occurring in the Mediterranean. Molecular phylogenetic studies recovered Charybdis as distant from Urginea; this finding was also supported by morphology and phytochemistry data. However, after typification of Scilla using S. maritima by Rafinesque, Charybdis became illegitimate under Art. 52 of the Shenzhen Code as its name became superfluous when published. A binding decision was requested from the Nomenclature Committee for Vascular Plants (NCVP) on whether Scilla L. and Squilla Steinh. are sufficiently alike to be considered orthographic variants and, hence, to be confused. Most members of the committee favour treating Squilla as not confusable with Scilla, which leaves the former name available for the current concept of Charybdis. In this context, we reevaluate the taxonomy of the genus, accepting 12 species of which eight are accommodated in Squilla as new combinations. Conversely, one of the species of Charybdis is transferred here to Urginavia. Nomenclatural types (including designation of 13 lectotypes, one neotype and one epitype) and the most relevant synonyms are given for each accepted taxon. An identification key is also presented for Squilla to assist future taxonomic studies in this group. We also include a revision of the taxonomic circumscription of the taxa related to S. undulata.This work was partly supported by the grants ACIE18-03, UAUSTI18-02 and UAUSTI19-08 from the University of Alicante

Eliokarmos humanii (Hyacinthaceae, Ornithogaloideae), a new species from Namaqualand in South Africa and a new combination in the genus

A new species of the southern Africa endemic genus Eliokarmos, that includes the well-known chincherinchees, is described from the vicinity of Kotzesrus, Northern Cape Province of South Africa. Eliokarmos humanii sp. nov. is unique in the genus based on its single, slightly fleshy, suborbicular, convex leaf with ciliate margin, and the short subspiciform inflorescence with almost sessile flowers. A complete description is presented for this species, and data on morphology, ecology, and distribution are reported. In addition, Ornithogalum richtersveldensis, recently described from northwestern South Africa, is transferred to Eliokarmos based on its morphology and biogeography, and a new combination is presented for this species in the latter genus.This work was partly supported by H2020 Research and Innovation Staff Exchange Programme of the European Commission, project 645636: ‘Insect-plant relationships: insights into biodiversity and new applications’ (FlyHigh), and the grants ACIE18–03 UAUSTI18–02 and UAUSTI19-08 from the University of Alicante

3D Ultrastructural Study of Synapses in the Human Entorhinal Cortex

The entorhinal cortex (EC) is a brain region that has been shown to be essential for memory functions and spatial navigation. However, detailed three-dimensional (3D) synaptic morphology analysis and identification of postsynaptic targets at the ultrastructural level have not been performed before in the human EC. In the present study, we used Focused Ion Beam/Scanning Electron Microscopy to perform a 3D analysis of the synapses in the neuropil of medial EC in layers II and III from human brain autopsies. Specifically, we studied synaptic structural parameters of 3561 synapses, which were fully reconstructed in 3D. We analyzed the synaptic density, 3D spatial distribution, and type (excitatory and inhibitory), as well as the shape and size of each synaptic junction. Moreover, the postsynaptic targets of synapses could be clearly determined. The present work constitutes a detailed description of the synaptic organization of the human EC, which is a necessary step to better understand the functional organization of this region in both health and diseaseSpanish “Ministerio de Ciencia e Innovación” (grant PGC2018-094307-B-I00); the Cajal Blue Brain Project (the Spanish partner of the Blue Brain Project initiative from EPFL, [Switzerland]); Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Spain (CB06/05/0066); the Alzheimer’s Association (ZEN-15-321663); the European Union’s Horizon 2020 Framework Programme for Research and Innovation (grant agreement No. 945539) to Human Brain Project SGA3; the Spanish “Ministerio de Educación y Formación Profesional” (FPU14/02245 to M.M.-C.); UNED (Plan de Promoción de la Investigación, 2014-040-UNED-POST to L.B.-L.) We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).

Validación de un nombre en Biscutella (Brassicaceae) del este de la Península Ibérica

The name Biscutella marinae is applied to an endemic plant from co-astal sand-dune ecosystems of northern Alicante. It however was not published accor-ding to the Melbourne Code, and therefore it still remains nomenclaturally invalid. In the present contribution it is validated, and new data are reported that complete the available information on that endemic.El nombre Biscutella marinae se aplica a un endemismo de los ecosistemas de dunas costeras del norte de Alicante. Sin embargo, su publicación ini-cial no se hizo conforme al Codigo de Melbourne, por lo que dicho nombre no es váli-do nomenclaturalmente. Por ello, aquí se valida y se aportan datos que completan la in-formación existente sobre este endemismo.This work was partly supported by the I+D+i research project CGL2011–30140 from MICINN (Mº de Economía y Competitividad, Spanish Government). The Andrew W. Mellon Foundation, New York, supported the type di-gitization for the Global Plant Initiative (GPI)

Influencia de la website sobre el patrocinio : segmentación PLS-POS

El patrocinio es una de las técnicas de marketing no convencionales que más inversión atrae en el área deportiva. Junto con el sitio web, es una de las principales fuentes de ingresos de las entidades y organizaciones deportivas. Este estudio aplica una segmentación no observada orientada a la predicción (PLS-POS) con el objetivo de examinar el efecto del sitio web sobre el proceso de transmisión de imagen según la teoría propuesta por Gwinner (1997). Obtuvimos 225 encuestas insertando un cuestionario creado ad hoc en un banner de un evento internacional de tenis. La variable actitud hacia el deporte es la mejor variable para segmentar la muestra según los resultados del PLS-POS y la técnica de árbol de decisión CHAID. El estudio aporta dos importantes novedades, por un lado examina la influencia del sitio web sobre el efecto del patrocinio, y por otro, aplica una metodología inédita en el estudio del patrocinio.Sponsorship is among the unconventional marketing techniques that attract the most investment in the sports field. Along with webs, sponsorship is one the main sources of income for sports entities and organizations. Following Gwinner's theory (1997), this study applies a predictionoriented unobserved segmentation (PLS-POS) with the aim of exploring the impact of websites on the image transfer process. We gathered 225 surveys by displaying a banner in a tennis international event. The variable 'attitude towards sport' is the best one for segmenting the sample according to the results of the PLS-POS method and the CHAID decision tree technique. The study introduces two significant developments: on one hand, it analyzes the impact of websites on the effect of sponsorship, while on the other hand it applies an unprecedented methodology to the study of sponsorship

Geolodía!

Peer reviewe

Trimelopter cordifolium (Hyacinthaceae subfam. Ornithogaloideae), a new species from South Africa

The study of wild and cultivated material of Trimelopter from the Northern Cape province of South Africa revealed an undescribed species that shows a unique syndrome of morphological characters. We here describe Trimelopter cordifolium based on plants approaching T. psammophorum but differing in its small, cordate, psammophorous leaf, shorter inflorescence and pedicels, smaller flowers and bracts, and more prominently sculptured ovary. We provide a complete morphological description as well as data on ecology and distribution. We also report new data and illustrations of T. psammophorum, which complement its scarce description in the protologue.This work was partly supported by H2020 Research and Innovation Staff Exchange Programme of the European Commission, Project 645636: ‘Insect-plant relationships: insights into biodiversity and new applications’ (FlyHigh) and the complementary supporting funds UAUSTI19-08, UAUSTI22-05, ACIE18-03, ACIE21-01, ACIE22-01, VIGROB2021-166, and VIGROB2022-166 (University of Alicante, Spain)