323,694 research outputs found
Innovare la didattica tra STEM e digitale: l’esperienza del progettoDiventerò
No full textIl secondo working paper di Chiara Lodi Rizzini e Sofia Barbè Cornalba, intitolato “Innovare la didattica tra STEM e digitale: l’esperienza del progettoDiventerò”, presenta gli esiti di una ricerca realizzata per supportare Fondazione Bracco nel definire le strategie future da adottare nel campo dell’orientamento e della didattica, in particolare alla luce dei mutamenti che stanno avvenendo in Italia in tali ambiti. L’intento era indagare gli effetti delle iniziative che la Fondazione ha promosso negli ultimi anni sul fronte dell’orientamento scolastico per valorizzare le potenzialità delle discipline STEM (Science, Technology, Engineering and Mathematics), per innovare le metodologie didattiche e per costruire nuovi paradigmi per l’apprendiment
Potencial fisiológico de sementes de Handroanthus spongiosus (Rizzini) S. Grose (Bignoniaceae) por meio do teste de tetrazólio.
No full textEste trabalho teve por objetivo determinar as condições ideais do TTZ para sementes de Handroanthus spongiosus (Rizzini) S. Grose
Stryphnodendron barbatulum Rizzini & Heringer 1987
No full text2. Stryphnodendron barbatulum Rizzini & Heringer (1987: 449). — Type: BRAZIL. Distrito Federal, Brasília, Barragem do Torto, 14 September 1985, Salles & Heringer 241 (holotype RB 288833!) = Stryphnodendron sallesianum Heringer & Rizzini (Rizzini & Heringer 1987: 450).— Type: BRAZIL. Distrito Federal, Brasília, Barragem do Torto, 11 November 1985, Salles 388 (holotype RB 288834!, isotype RB!). Syn. nov. Shrub 40–70 cm tall. Leaves with 5–9 pairs of pinnae; 5–11 pairs of leaflets; rachis nectaries 1–2, verruciform; blade usually chartaceous, margin sparsely puberule at least near the base and at the apex, leaflets 1.5–2.9(–3.5) × 1.2–2(–2.5) cm, discolor to rarely subconcolor, upper surface glabrous, lower surface sparsely puberule with a denser indumentum along the midrib, near the base and the apex, unilateral tuft of trichomes on the lower surface present. Inflorescences of simple thyrsi; cymulae of usually solitary spikes, rarely geminate, vinaceous. Flowers diclinous, vinaceous. Fruit a follicule, straight, flat-compressed, valves dark-brown (Fig. 2B). Remarks: — S. barbatulum and S. sallesianum were originally treated as distinct taxa based only in the type collection, but the analysis of new specimens revealed many intermediary characteristics mainly in respect to pinnae number and size, and with identical follicle fruits. Based on this, S. sallesianum is considered a synonym. Distribution and habitat: —This species is only known from the type locality, region of Granja do Torto, Brasília (Federal District), where it occurs in cerrado areas. Conservation: —Critically Endangered (CR B2ab(ii,iii)) [AOO= 4.000 km 2, EOO not measurable]. Although the reduced size of the individuals makes it difficult to visually estimate the size of the populations, the species occurs in an area that has received considerable collecting efforts in the last decades. However, there are no recent collections of this taxon and recent visits to the region revealed a very small fragment of remaining native vegetation, though not occupied by residences, but taken by ruderal plants. The area is indisputably under extreme anthropogenic pressure, and thus Stryphnodendron barbatulum is here considered Critically Endangered. Phenology: —Flowering samples of this species were collected in September and November, fruiting samples were collected in February.Published as part of Scalon, Viviane Renata, Paula-Souza, Juliana De, Lima, Alexandre Gibau De & Souza, Vinicius Castro, 2022, A synopsis of the genus Stryphnodendron (Fabaceae, Caesalpinioideae, mimosoid clade), pp. 227-279 in Phytotaxa 544 (3) on page 235, DOI: 10.11646/phytotaxa.544.3.1, http://zenodo.org/record/652028
Compliant design for intrinsic safety: general issues and preliminary design
No full textWe describe some initial results of a project aiming at the development of a programmable compliance, inherently safe robot arm for applications in anthropic environments. In order to obtain safety in spite of worst-case situations (such as unexpected delays in teleoperation, or even controller failure), we propose an approach to achieving the compliance by mechanical rather than by control design. We first describe some of the control problems encountered in a typical, large, possibly unknown mechanical compliance, and present the result that shows the possibility to cope with these uncertainties in an adaptive way. Next, we describe the initial development of a new prototype arm under construction in our laboratory. The arm is designed to achieve arbitrary position tracking in 3D with controlled effective compliance at the joint
Stryphnodendron gracile Heringer & Rizzini 1966
No full text<p> 13. <i>Stryphnodendron gracile</i> Heringer & Rizzini (1966: 105).</p> <p> — Type: BRAZIL. Minas Gerais, Serra do Cipó, 12 November 1959, <i>Heringer 7361</i> (lectotype RB00584092!, designated here, isolectotypes NY!, UB!)</p> <p> <b>Subshrubs</b> 30–50 cm tall, usually cespitose, bearing a well-developed, woody underground root-like system, very rarely shrubs to 2 m tall. <b>Leaves</b> with (4–)5–8(–9) pairs of pinnae; (5–)7–12 pairs of leaflets; rachis nectaries 4, patelliform; blade chartaceous, margin glabrous, leaflets (6–)8–14(–18) × (2–)4–6(–9) mm, discolor, glabrous on both surfaces, unilateral tuft of trichomes on the lower surface absent. <b>Inflorescences</b> of simple thyrsi; cymulae of usually solitary spikes, sometimes geminate, rarely ternate, vinaceous to reddish. <b>Flowers</b> monoclinous or diclinous, vinaceous. <b>Fruit</b> a follicule, straight, flat-compressed, 6.5–9.5(–11) × 1.5–1.9 cm, valves atrovinaceous to dark-brown.</p> <p> <b>Nomenclatural Notes:</b> —Heringer & Rizzini (1966) indicated two syntypes for <i>S. gracile</i>, both deposited in RB (RB118804/ Rizzini s.n. and RB121073/ E.P. Heringer 7361). The gathering selected by us as lectotype (Heringer 7361, barcode RB00584092!) is mounted in two separate sheets, and the one bearing the label corresponds to the lectotype.</p> <p> <b>Distribution and habitat:</b> —This species occurs on slopes and rocky outcrops, campos rupestres and high altitude campos cerrados of the Serra do Cipó, Minas Gerais state, usually in shallow and rocky soils. The collection <i>Glaziou 14649</i> reportedly gathered in Barbacena (Minas Gerais) corresponds to a mixed set of <i>S. cristalinae</i> (P) and <i>S. adstringens</i> (G, P and R), thus the distribution of the taxon is still considered restricted to the site of the type collection.</p> <p> <b>Conservation</b>:—Endangered (EN B1ab(i,ii,iii,iv)+2ab(i,ii,iii,iv)) [AOO= 16.000 km 2, EOO= 279.553 km 2]. Although there are registers of this species in conservation units, its distribution area is very reduced and there are indications that it forms small populations.</p> <p> <b>Phenology:</b> —This species was collected with flowers from March to June and from September to December, while specimens with fruits were collected in February, April and May.</p> <p> <b>Selected specimens examined:</b> — BRAZIL. Minas Gerais: Jaboticatubas, Serra do Cipó, km 113, ao longo da Rodovia Lagoa Santa – Conceição do Mato Dentro – Diamantina, 15 April 1972, fr., <i>A.B. Joly et al CFSC1534</i> (SP). Santana do Riacho, Serra do Cipó, 24 October 1974, fl., <i>G. Hatschbach 35285</i> (MBM, UEC).</p>Published as part of <i>Scalon, Viviane Renata, Paula-Souza, Juliana De, Lima, Alexandre Gibau De & Souza, Vinicius Castro, 2022, A synopsis of the genus Stryphnodendron (Fabaceae, Caesalpinioideae, mimosoid clade), pp. 227-279 in Phytotaxa 544 (3)</i> on page 246, DOI: 10.11646/phytotaxa.544.3.1, <a href="http://zenodo.org/record/6520280">http://zenodo.org/record/6520280</a>
Are the current attempts at standardization of antiphospholipid antibodies still useful? Emerging technologies signal a shift in direction.
No full textThe pathogenic role of antiphospholipid antibodies (aPL) has been widely established over past years in several experimental models and clinical studies. Accordingly, the detection of aPL by immunoassays (anticardiolipin antibodies; anti-β2 glycoprotein I antibodies) has become a routine practice in the clinical workup of patients with systemic autoimmune diseases. aPL are mostly assayed using commercial ELISA kits, whose performance has not been found to be sufficiently concordant among the different manufacturers. In the past years, collaborative groups have spent considerable effort to reach some form of standardization but this process is still ongoing. Such lack of standardization has recently become even more crucial, as manufacturers have had to face an increasing demand for fully automated tests for aPL, like those test systems that have been developed for other autoantibodies (e.g., antinuclear antibodies, anti-ENA antibodies). We therefore report our recent experience with two newly developed automated methods for anticardiolipin antibodies testing. In particular, we discuss the results obtained using routine samples, as we believe that these better reflect the "real-life" situation in which those automated methods will operate. We also mention other emerging technologies in the field of aPL detection. Copyrigh
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