941 research outputs found
Heterothrips pedicellatus Pereyra & Cavalleri, 2012, sp. n.
No full textHeterothrips pedicellatus sp. n. Female winged. Body brown (Fig. 11); femora brown; tibiae brown with pale apex; tarsi pale; antennal segments I– II and IV–IX brown, III pale (Fig. 16); fore wing brown with a pale band near the base (Fig. 20). Head wider than long, with no long setae; ocellar region with three pairs of setae, pair III arising on anterior margin of ocellar triangle (Fig. 13); interantennal projection with widely separated arms. Antennae 9 -segmented, segment III long with an elongate pedicel and two constrictions, one at the union between the pedicel and segment, the other near the base of segment; segment IV entire and shorter than III (Figs 15–16), both with two rows of sensorial pores. Pronotum reticulate-striate with no long setae (Fig. 14); mesonotum reticulate-striate; metanotum with concentric sculpture around basal midpoint, covered with microtrichia (Fig. 12). Fore wing with two rows of conspicuous brown setae (Fig. 20). Abdominal tergites I–VII with sparse microtrichia on lateral thirds and posterior margin with craspedal lobes laterally, each rectangular lobe bearing a fringe of fine, irregular microtrichia (Figs 17, 19). Tergites II–V posterior margin with few microtrichia medially, VI–VII with a complete feinge of microtrichial medially, with no gap between this and the lobes. Tergite VIII with continuous posteromarginal microtrichia. Sternites II–VI posterior margins with well-developed craspedal lobes bearing microtrichia (Fig. 18) and with 7 pairs of posteromarginal setae; few discal setae present. Measurements (holotype female in microns). Body length 1430 (distended). Head, length 120; width 165. Pronotum, length 137; width 210. Fore wing length 730; median width 43. Abdominal tergites IX and X length 72 and 82, respectively. Antennal segments III–IX length (width), 83 (30), 47 (27), 22 (17), 27 (15), 15 (12), 15 (10), 21 (8). Male winged. Similar to female in coloration but smaller; abdominal tergites II–VI with craspedum interrupted medially, with long and fine teeth; lateral thirds of tergites I–VIII covered with numerous irregular rows of microtrichia. Intermediate abdominal sternites without discal setae, sternites III–VIII with large transverse pore plates. Measurements (paratype male in microns). Body length 1030 (distended). Head, length 100; width 155. Pronotum, length 137; width 220. Fore wing length 600; median width 37; Abdominal segments IX + X length 107; width 132. Material examined. Holotype female, Brazil, São Paulo, Mogi-Guaçu, 30.ix. 2011, on Diplopterys pubipetala flowers (A. Cavalleri). Paratypes: 11 females, 3 males collected with holotype; Bahia, Ibicoara, iv. 2002, 1 female on “native plants” (O. Feiler); São Paulo, Campinas, 26.III. 2010, 3 females on Niedenzuella glabra flowers (A. Cavalleri). Comments. This new species has been collected with paulistarum from two species of Malpighiaceae. The elongated pedicel on antennal segment III is similar to that found in prosopidis, but the segment is much wider at the apex than the base, unlike in prosopidis. The abdominal tergites have similar lateral craspedal lobes, but the microtrichia are smaller in pedicellatus than in prosopidis. The general coloration is similar in these two species, as well as the form of the terminal abdominal segment. The metanotal sculpture of pedicellatus is similar to that found in flavicornis with a central triangular area, although they feature different reticulation patterns. Like the other Brazilian species obscurus, pedicellatus presents lateral craspedal lobes on the posterior margins of the abdominal tergites, although these two species differ in the antennal coloration and the length of antennal segment III pedicel (which is remarkably longer in pedicellatus). Moreover, the microtrichia on abdominal craspedum are slightly smaller in pedicellatus than in obscurus.Published as part of Pereyra, Veronica & Cavalleri, Adriano, 2012, The genus Heterothrips (Thysanoptera) in Brazil, with an identification key and seven new species, pp. 1-23 in Zootaxa 3237 on pages 15-18, DOI: 10.5281/zenodo.28041
Genomic insights and the Irish Travellers: an interview with Professor Gianpiero Cavalleri
No full textProfessor Gianpiero Cavalleri is Associate Professor of Human Genetics at Department of Molecular and Cellular Therapeutics at the Royal College of Surgeons in Ireland and is the lead author of a 2017 study into the genetic structure of the Irish Traveller community. The study provided an estimate of when Irish Travellers split from the ‘settled' population in Ireland. This population-based genetic research project involved researchers from the Royal College of Surgeons in Ireland, University College Dublin, the University of Edinburgh and the Hebrew University of Jerusalem and looked into the history and structure of the Traveller population in the context of ‘settled' Irish as well as neighbouring European and Roma Gypsy groups
Genomic Insights and the Irish Travellers: An Interview with Professor Gianpiero Cavalleri
No full textGianpiero Cavalleri is Associate Professor of Human Genetics at the Department of Molecular and Cellular Therapeutics at the Royal College of Surgeons in Ireland and is the lead author of a 2017 study into the genetic structure of the Irish Traveller community. The study provided an estimate of when Irish Travellers split from the ‘settled' population in Ireland. This population-based genetic research project involved researchers from the Royal College of Surgeons in Ireland, University College Dublin, the University of Edinburgh and the Hebrew University of Jerusalem and looked into the history and structure of the Traveller population in the context of ‘settled' Irish as well as neighbouring European and Roma Gypsy groups.
A full-text version of the study first published in the journal Scientific Reports can be accessed at https://epubs.rcsi.ie/cgi/viewcontent.cgi?referer=https://www.google.ie/&httpsredir=1&article=1100&context=mctart.
This interview took place at RCSI on Tuesday 21st November 2017
Mechanical Characterization of Biomimetic Membranes using AFM-based Force Clamp Spectroscopy
No full textCharacterization tools for mechanical probing of biomimetic materials
No full textThe possibility to fully heal damaged or failing tissues and organs is one of the major challenges of modern medicine. Several approaches have been proposed, either using tissue engineered functional substitutes or inducing the body to self-repair, exploiting its innate regenerative potential. In any case, a crucial step for the success of therapy is provided by the design of a suitable scaffold, capable to sustain cellular growth and induce the differentiation towards the lineage of interest. A growing body of evidence suggests that the most affordable way to design an effective scaffold is to exploit a biomimetic approach, trying to emulate the characteristics of the natural environment. Moreover, it has been pointed out that not only the chemical nature of the material is relevant to this process but also its physical and, in particular, mechanical properties. Mapping the elasticity of a living tissue is becoming more and more relevant in the rational design of next generation biomimetic scaffolds, and the exploitation of advanced tools is required to achieve sub-μm resolution, comparable to the length scale probed by a single living cell
La Shoah come metamorfosi dell’oggi. Considerazioni oltre i paradigmi dell’impossibilità e dell’illegittimità della rappresentazione di Auschwitz
No full textIl saggio - in dialogo costante con l'opera di Arturo Mazzarella e in un orizzonte di rimandi composto da autori come Levi, Améry, Antelme, Celan, Duras, Farocki, Godard, Canetti, Simmel, Benjamin, Didi-Huberman, Lévinas, Minkowski e Cassirer - affronta il paradigma della rappresentazione della Shoah a partire non dalla impossibilità o illegittimità della rappresentazione di Auschwitz, ma dalla condizione ontologica della rappresentazione ad Auschwitz. Centrale, nell'analisi, il concetto di metamorfosi, colto come prisma della riattivazione della dimensione simbolica della rappresentazione che proprio il regime nazi-fascista ha inesorabilmente cancellato
Preparation, application and recycling of a catalytic microflow reactor based on polylactic acid
No full textIn this work, novel catalytic microflow reactors prepared by 3D printing and based on polylactic acid (PLA), a compostable biopolymer of relevant industrial interest, were developed. To maintain the properties of the polymer bulk, the metal catalyst, namely palladium (Pd), was deposited in the form of nanoclusters on the surface of the inner walls of the microreactor. A functionalization reaction, i.e. aminolysis, was carried out to activate the channel surface to the metal precursor. The catalyst deposition approach, carried out in water, allowed obtaining a homogeneous distribution of Pd clusters with average dimensions of ca. 20 nm. Hydrogenation reactions performed in a batch system, using reactor sections, superficially decorated with Pd nanoclusters, demonstrated the excellent activity of the system and the absence of the catalyst leaching. In order to prove the effectiveness of the catalytic system under flow conditions, the elimination of the propargyloxy protecting group from Proc-4-methoxybenzylamine was performed using the activated microflow reactor. The higher catalytic activity, observed under flow conditions compared to a batch system, demonstrated the effectiveness of this configuration. Finally, the developed catalytic microreactor was shown to maintain the same degradation behavior as the neat material and to be easily recyclable
Structural vs. electrochemical investigation of niobium oxide layers anodically grown in a Ca and P containing electrolyte
No full textThe growth of anodic oxide on niobium has been investigated as a function of the applied potential in a solution containing P and Ca-EDTA complexes. Anodizing below and above the breakdown potential has been explored via morphological (AFM and SEM) and compositional (XPS and EDX) analysis. Below the breakdown potential, thin (few hundreds of nanometers) and uniform oxide layers are formed, with negligible inclusions of electrolyte ions. Conversely, above the breakdown potential, in the so-called ASD regime, thicker and microporous oxide layers are observed, with a significant enrichment of the matrix with Ca and P. At potentials around 250 V the structure evolves towards a highly inhomogeneous and porous layer with the presence of some fractures, potentially affecting the oxide passivation properties. The corrosion resistance properties of the oxide layers have been investigated by electrochemical methods (OCP, anodic polarization and EIS). Data indicate that the corrosion resistance, initially increasing with the anodizing potential, weakens at potentials around 250 V. A potential of about 200 V represents, therefore, a good tradeoff between morphological and compositional properties and resistance to corrosion, which are important issues in view of osteoconductive properties for orthopaedic implant applications
Frankliniella musaeperda Hood 1952
No full text<i>musaeperda</i> Hood, 1952 <p>(Figs 11, 49, 70, 99, 135, 152)</p> <p> This thrips is newly recorded from Brazil, although the identification is based on the original description and comments in Mound and Marullo (1996). Originally described from Haiti, the ring on the pedicel in this species is larger than in any other described <i>Frankliniellla</i>. Specimens identified as <i>musaeperda</i> have been studied from several sites from Paraná to Minas Gerais.</p> <p> NEW RECORD. <b>Brazil</b>: <b>Minas Gerais</b>, Juiz de Fora, 5 females on <i>Lippia</i> sp. flowers, 11.xii.2011 (A. Cavalleri); Uberlândia, 2 females, 3 males on <i>Hancornia speciosa</i>, 2007 (E.A. Silva); <b>Paraná</b>, Marialva, 1 female on grapes, xi.2001 (A.M. Meneguim); São Paulo, Mogi-Guaçu, 2 females on <i>Byrsonima</i> flowers, 16.v.2010 (A. Cavalleri).</p>Published as part of <i>Cavalleri, Adriano & Mound, Laurence A., 2012, Toward the identification of Frankliniella species in Brazil (Thysanoptera, Thripidae), pp. 1-30 in Zootaxa 3270</i> on page 11, DOI: <a href="http://zenodo.org/record/246160">10.5281/zenodo.246160</a>
POLYMERIC SEPARATED PHASE IN MONOMOLECULAR FILMS REVEALED BY SCANNING FORCE MICROSCOPY
No full textPolymeric phase domains in monolayers of a styrene functionalized surfactant are revealed by scanning force microscopy (SFM) inspection. The monomeric films are formed and polymerized by UV irradiation at the nitrogen-water interface and subsequently deposited on glass slides. SFM images have features similar to fluorescence microscope images but reveal more details of the polymeric phase texture. Polymeric domains are characterized by larger thickness and different roughness. Small polymeric clusters are also revealed
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