304 research outputs found

    Uma intervenção curricular baseada na abordagem temática: o caso do cultivo do arroz

    Get PDF
    O presente trabalho, de cunho qualitativo, do tipo Estudo de Caso, foi desenvolvido a partir da ideia da abordagem temática balizado nos referenciais de Paulo Freire cujo tema central é: O Cultivo do Arroz. O objetivo geral deste trabalho é avaliar a implementação do tema exposto acima que foi aplicado numa escola pública. Na estruturação do tema foi utilizada a dinâmica dos Três Momentos Pedagógicos. A metodologia de análise utilizada foi a Análise Textual Discursiva. Dentre os resultados deste trabalho, destaca-se que os alunos demonstraram o quanto o tema está fortementerelacionado à sua realidade, bem como, verificou-se uma maior dialogicidade e participação dos mesmos no decorrer das aulas, além da relevância do trabalho interdisciplinar

    Rediscovery of a lost semi-aquatic Leaf Beetle in the Hula Valley, Israel (Coleoptera, Chrysomelidae, Donaciinae)

    Get PDF
    : Between 1951-1958, most of the Hula Lake and its surrounding swamps in the Upper Jordan River (Rift) Valley of Israel were drained with the supposed purposes to eliminate malaria and to reclaim land for agriculture; both reasons later proved to be unnecessary decisions. With the paucity of biological knowledge of the Hula region, especially its aquatic invertebrates, accurate assessment of the environmental damage from this drainage is still being realized. Based on natural history museum collection specimen records, the pre-drainage presence of some aquatic insect species has been verified. Among these was Donaciabicolora, a member of a semi-aquatic subfamily (Donaciinae) of Leaf Beetles (Chrysomelidae) and whose Israeli populations were thought to have gone extinct because of the drainage of the Hula and other locations. Recently this species was rediscovered in two populations. However, the molecular identification of two of these recently collected specimens from one population revealed that the identity of this species is actually Donaciasimplex. In this work, the re-discovery of this species is detailed, and its conservation importance discussed

    Electron transport through a metal-molecule-metal junction

    Full text link
    Molecules of bisthiolterthiophene have been adsorbed on the two facing gold electrodes of a mechanically controllable break junction in order to form metal-molecule(s)-metal junctions. Current-voltage (I-V) characteristics have been recorded at room temperature. Zero bias conductances were measured in the 10-100 nS range and different kinds of non-linear I-V curves with step-like features were reproducibly obtained. Switching between different kinds of I-V curves could be induced by varying the distance between the two metallic electrodes. The experimental results are discussed within the framework of tunneling transport models explicitly taking into account the discrete nature of the electronic spectrum of the molecule.Comment: 12 pages, 12 figures to appear in Phys. Rev. B 59(19) 199

    ExperiĂŞncias no manejo de vinhedos a partir do acompanhamento junto Ă  equipe de Engenheiros AgrĂ´nomos da Cooperativa VinĂ­cola Aurora

    Get PDF
    Este relatório contém as informações referentes as atividades realizadas durante o estágio obrigatório do curso de Agronomia, no período de 21 de março a 31 de maio de 2022, realizado no setor agrícola da Cooperativa Vinícola Aurora LTDA, localizado junto às unidades da empresa no município de Bento Gonçalves (RS). O objetivo do estágio foi acompanhar e auxiliar nas atividades realizadas pelos Engenheiros Agrônomos da Cooperativa junto às demandas geradas pelos agricultores cooperados. As atividades desenvolvidas durante este período estiveram diretamente relacionadas a práticas de manejo executadas nos vinhedos, incluindo o controle de doenças foliares em final de ciclo, semeadura de plantas de cobertura, correção da fertilidade do solo, avaliação do grau de maturação das uvas e o controle químico da pérola-da-terra

    Une industrie pré-acheuléenne en Brivadois (Haute-Loire): A pre-acheulian assemblage in Brivadois (Haute-Loire)

    Get PDF
    pdf du manuscritNational audienceA pebble-tools assemblage made of quartz has been recently discovered near Brioude on a high terrace of the Allier river. It brings us details about the first phases of the succession previously established from the sites of Bourbonnais. According to indirect dating data, one can estimate the age between 0.8 and 0.5 M.aUn outillage sur galets de quartz a été récemment découvert près de Brioude, en surface d'une haute terrasse de l'Allier. Il permet de préciser les caractères des stades anciens du schéma évolutif établi à partir des nombreux gisements du Bourbonnais. En fonction des éléments de datation indirecte, l'âge de ces objets est estimé entre 0,8 et 0,5 M.a

    Early amniotomy after cervical ripening for induction of labor: a systematic review and meta-analysis of randomized controlled trials

    Get PDF
    OBJECTIVE DATA: Timing of artificial rupture of membranes (ie, amniotomy) in induction of labor is controversial, because it has been associated not only with shorter labors, but also with fetal nonreassuring testing, at times necessitating cesarean delivery. The aim of this systematic review and metaanalysis of randomized trials was to evaluate the effectiveness of early amniotomy vs late amniotomy or spontaneous rupture of membranes after cervical ripening. STUDY: The search was conducted with the use of electronic databases from inception of each database through February 2019. Review of articles included the abstracts of all references that were retrieved from the search. STUDY APPRAISAL AND SYNTHESIS METHODS: Selection criteria included randomized clinical trials that compared early amniotomy vs control (ie, late amniotomy or spontaneous rupture of membranes) after cervical ripening with either Foley catheter or prostaglandins at any dose. The primary outcome was the incidence of cesarean delivery. The summary measures were reported as summary relative risk with 95% of confidence interval with the use of the random effects model of DerSimonian and Laird. RESULTS: Four trials that included 1273 women who underwent cervical ripening with either Foley catheter or prostaglandins and then were assigned randomly to either early amniotomy, late amniotomy, or spontaneous rupture of membranes (control subjects) were included in the review. Women who were assigned randomly to early amniotomy had a similar risk of cesarean delivery (31.1% vs 30.9%; relative risk, 1.05; 95% confidence interval, 0.71-1.56) compared with control subjects and had a shorter interval from induction to delivery of approximately 5 hours (mean difference, -4.95 hours; 95% confidence interval, -8.12 to -1.78). Spontaneous vaginal delivery was also reduced in the early amniotomy group, but only 1 of the included trials reported this outcome (67.5% vs 69.1%; relative risk, 0.78; 95% confidence interval, 0.66-0.93). No between-group differences were reported in the other obstetrics or perinatal outcomes. CONCLUSION: After cervical ripening, routine early amniotomy does not increase the risk of cesarean delivery and reduces the interval from induction to delivery

    Revision of type and non-type material assigned to the genus Orthocladius by Goetghebuer (1940–1950), deposited in the Royal Belgian Institute of Natural Sciences (Diptera: Chironomidae)

    Get PDF
    Selected type and non-type material belonging to the genus Orthocladius van der Wulp, 1874 (Diptera: Chironomidae) sensu G OETGHEBUER (1940\u20131950), deposited in the Royal Belgian Institute of Natural Sciences (RBINS), originally comprising specimens dry pinned or stored in isinglass, were mounted on microscope slides and re-examined. Other chironomids present in the RBINS collection belonging to other genera were also examined. Fifty slides were prepared and identified to species, or to generic level when the condition of the specimens did not allow species identification. The following types, representing taxa formerly considered as nomina dubia, were examined and the concerned species are stated here as valid: Georthocladius collarti (Goetghebuer, 1941) comb. nov., Georthocladius scaturiginis (Goetghebuer, 1940) comb. nov., Lapposmittia succinea (Goetghebuer, 1942) comb. nov., Orthocladius (Euorthocladius) tolleti Goetghebuer, 1944 (new subgenus placement), Orthocladius (Orthocladius) timoni Goetghebuer & Timon-David, 1939, Pseudorthocladius hockaiensis (Goetghebuer, 1933). Orthocladius (Orthocladius) mitisi Goetghebuer, 1938, previously stated as junior synonym of Orthocladius (Orthocladius) glabripennis (Goetghebuer, 1921), is reinstated as valid species. The following new synonyms are proposed: Georthocladius (Georthocladius) collarti = Parachaetocladius retezati Albu, 1972: 19, syn. nov.; Cricotopus (Paratrichocladius) rufiventris (Meigen, 1830) = Orthocladius franzi Goetghebuer, 1949, syn. nov.; Cricotopus (Paratricho-cladius) skirwithensis Edwards, 1929 = Orthocladius nigritus Goetghebuer, 1938, syn. nov. = Paratrichocladius spiesi Ashe & O\u2019Connor, 2012; Hydrobaenus distylus (Potthast, 1914) = Orthocladius antennalis Goetghebuer, 1944, syn. nov. Lecto-types of Orthocladius collarti Goetghebuer, 1941, Orthocladius antennalis Goetghebuer, 1944, Orthocladius timoni Goetghebuer & Timon-David, 1939, and Orthocladius hockaiensis Goetghebuer, 1933 are designated. Non-type material assigned to Orthocladius was also mounted on slides and identified. Although a list of the non-Orthocladius taxa is also provided, no taxonomic changes are proposed for the latter
    • …
    corecore