Search results for "Podium"
showing 10 items of 41 documents
Focal adhesions are hotspots for keratin filament precursor formation
2006
Recent studies showed that keratin filament (KF) formation originates primarily from sites close to the actin-rich cell cortex. To further characterize these sites, we performed multicolor fluorescence imaging of living cells and found drastically increased KF assembly in regions of elevated actin turnover, i.e., in lamellipodia. Abundant KF precursors (KFPs) appeared within these areas at the distal tips of actin stress fibers, moving alongside the stress fibers until their integration into the peripheral KF network. The earliest KFPs were detected next to actin-anchoring focal adhesions (FAs) and were only seen after the establishment of FAs in emerging lamellipodia. Tight spatiotemporal …
Importance de la variabilité fonctionnelle intraspécifique des adventices en réponse aux pratiques culturales et aux conditions climatiques
2016
EAGESTADCT1; Importance de la variabilité fonctionnelle intraspécifique des adventices en réponse aux pratiques culturales et aux conditions climatiques. Ecologie des Communautés Végétales (ECOVEG 12)
L'anfiteatro di Sabratha: vecchie indagini e nuove ricerche
2012
L’Anfiteatro di Sabratha, ignorato dai viaggiatori del XVIII e XIX secolo, venne segnalato nel 1912 da Henri Méhier de Mathuisieulx ed indagato da Renato Bartoccini a partire dal 1924. Gli scavi e le ricerche portate avanti in quegli anni permisero di rimettere in luce gran parte del monumento, che rimase tuttavia non pubblicato. Recenti scavi e ricerche hanno adesso permesso di redigere un nuovo rilievo ed un nuovo studio del monumento. Il grande edificio, realizzato in conci di calcarenite locale, venne costruito sfruttando una cava di pietra alla periferia orientale della città antica probabilmente alla metà circa del II secolo d.C. e, contrariamente a quanto finora ritenuto, venne effet…
Les espaces funéraires laténien et augusto-tibérien des Reliades (Le Puy-en-Velay, Haute-Loire).
2022
Le site des Reliades au Puy-en-Velay (Haute-Loire) a livré deux petits espaces funéraires à crémation utilisés entre La Tène finale et l’époque augusto-tibérienne. Caractérisés par une implantation sur un lieu à la topographie remarquable, ils ont fait l’objet d’aménagements paysagers qui viennent souligner leur caractère ostentatoire. Par ailleurs, la présence de bassins pose la question de l’utilisation de l’eau dans le cadre de cérémonies funéraires et/ou commémoratives. Enfin, bien que le mobilier déposé dans les sépultures soit peu abondant et très détérioré par son passage sur le bûcher, quelques éléments permettent d’attribuer aux défunts un statut social relativement élevé. Il s’agi…
Follicle Cells of Styela plicata Eggs (Ascidiacea)
2001
Styela plicata eggs are surrounded by large follicle cells that at LM appear as highly vacuolated and columnar in shape; at the apical end of each cell lies a very large and clear vacuole, half of which extends inward. Electron microscope observations show a Single layer of largely spaced box-like follicle cells; the close cell-cell contact at their base is realized by interdigitations. The cell surface shows a peculiar structure, more developed in the latero-basal regions, consisting of a complex of membrane extensions, i.e. microvilli, filopodia and lamellipodia. Filopodia irradiate in all directions towards the adjacent cells and the outermost vitelline coat, thus creating a complex netw…
The Follicle Cells of Styela Plicata (Ascidiacea, Tunicata): A Sem Study
2000
The morphological aspect of the follicle cells of Styela plicata eggs is described by means of scanning electron microscope investigations. The follicular layer is made of spaced, cylindrical box-like cells which are arranged hexagonally. They adhere to the egg through a complex network of membrane extensions making an overall thin layer on the vitelline coat. The walls of the follicle cells are plentifully provided with microvilli, filopodia and lamellipodia, which allow a connection among the cells. At their apical end lies a large vacuole containing a granule, probably involved in secretion. At insemination the majority of spermatozoa is distributed on the apical membrane of the follicle…
Typification of the Presl’s name Calamintha canescens (Lamiaceae)
2021
Calamintha canescens is a taxon described in the “Flora Sicula” by K. B. Presl (1826), following the visit made to Sicily a few years earlier (March-July 1817). In the protologue Presl does not report any data on the distribution in Sicily of this taxon that will be almost completely forgotten in later floristic works. Only Nyman (1881) and later Šilić (1979) consider it as a variety respectively of Calamintha nepeta (L.) Savi and C. glandulosa (Req.) Benth. Following the review of a group of critical European taxa belonging to the genus Clinopodium L., lately Melnikov (2016) recovers the ancient taxon Calamintha canescens C. Presl and transfers it to the genus Clinopodium L. Also, the auth…
Clinopodium raimondoi (Lamiaceae), a new species from Sicily
2015
On the basis of the taxonomic study of the collections made by F. M. Raimondo, kept in PAL, a new species of Clinopodium is described. The new taxon, named Clinopodium raimondoi, occurs in N-W coast of Sicily on limestone substrata, in steppe communities dominated by Hyparrhenia hirta. The main distinctive characteristics of C. raimondoi, with respect to other taxa known from Europe and other Mediterranean countries, are the large size, the opposite and decussate branches, and the clearly woody at base stems of mature plants as well. Relationships of the new taxon with the Mediterranean ones in the C. nepeta group are also discussed.
Taxonomic uncertainty and a continental conundrum:Polypodium macaronesicumreassessed
2014
Data from the chloroplast trnL-F region are used to test the delimitation of putative diploid species in the Polypodium cambricum aggregate. In particular, we investigate the distinctiveness of the Macaronesian Polypodium macaronesicum, P. azoricum and the continental P. cambricum, investigate molecular diversity patterns within Macaronesia and establish the identity of putative P. macaronesicum material collected from an area in southern Spain, where it co-occurs with other Macaronesian elements. The analysis supports the distinction of Macaronesian and continental plants, with accessions from Macaronesia resolved as monophyletic. Greater haplotype diversity was found in Macaronesia than o…
Desarrollo de formulaciones alimentarias basadas en Chenopodium quinoa y Salvia hispanica L. con función preventivo/terapéutica de trastornos en el m…
2021
El incremento de enfermedades relacionadas con alteraciones en la homeostasis de la glucosa (i.e., obesidad, diabetes, glucogenosis), ha generado un continuo interés en el consumo de la quinoa (Chenopodium quinoa) y la chía (Salvia hispanica L.). Por ello, se ha estudiado en un primer objetivo el almidón de quinoa comparado con otros almidones comerciales (patata, arroz, trigo, maíz), determinando sus propiedades térmicas y de pasta y el efecto del tratamiento hidrotérmico en sus cinéticas de liberación de glucosa, así como evaluar el efecto de añadir harina de chía desgrasada (H_Ch) en los flujos de glucosa y en la respuesta metabólica en células HepG2. Como segundo objetivo, se ha estudia…