1,720,960 research outputs found
FIGURE 3 in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)
No full textFIGURE 3. Caenotropus schizodon, upper jaw showing functional and replacement teeth (mesial view) in a stained specimen, MCP 16953, 48.86 mm SL, Rio Tapajós, Amazonas.Published as part of Scharcansky, Alexandre & Lucena, Carlos Alberto Santos De, 2007, Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae), pp. 59-66 in Zootaxa 1557 on page 61, DOI: 10.5281/zenodo.17828
FIGURE 1. Caenotropus schizodon n in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)
No full textFIGURE 1. Caenotropus schizodon n. sp., holotype, MCP 29971, 71.53 mm SL, Rio Arinos, Mato Grosso, Brazil.Published as part of Scharcansky, Alexandre & Lucena, Carlos Alberto Santos De, 2007, Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae), pp. 59-66 in Zootaxa 1557 on page 60, DOI: 10.5281/zenodo.17828
FIGURE 16 in Phylogenetic assessment of ultrastructural and histological characters of teeth in the Anostomoidea, Hemiodontidae and Parodontidae (Teleostei: Ostariophysi: Characiformes)
No full textFIGURE 16. Phylogenetic hypothesis among Characiform taxa based on morphological evidence modified from Buckup (1998). Numbers refer to the apomorphic characters discussed in the text.Published as part of Scharcansky, Alexandre & Lucena, Carlos Alberto S., 2008, Phylogenetic assessment of ultrastructural and histological characters of teeth in the Anostomoidea, Hemiodontidae and Parodontidae (Teleostei: Ostariophysi: Characiformes), pp. 36-56 in Zootaxa 1948 (1) on page 54, DOI: 10.11646/zootaxa.1948.1.2, http://zenodo.org/record/523134
Leporinus reinhardti
No full textLeporinus reinhardti (Lütken) (Figs. 3, 4, and 5) The bone tissue close to the teeth is compact, without apparent alveoli. Replacement teeth are arranged in a single row and aligned with their respective functional tooth and lodged in trenches. The teeth show comparable developmental stages, and there is no pre-eruptive rotation. Histologically, the replacement teeth in their final stage of development show a pattern similar to that of functional teeth from the exterior inwards: a narrow enamel layer (light area of the tooth, see Figure 5C), which, because it was totally mineralized, was decalcified during the tissue preparation process, surrounded by elongated ameloblasts. Next, are the dentin layer and the set of odontoblasts, the same size as the ameloblasts. Finally, the dental papilla (mesenchymal cells) forms a narrow area. The functional teeth show a protrusive arm from their widest area by which they are supported on the internal epithelial tissue of the dentary (Fig 4A,B). The dentin layer is equally narrow all around the teeth. The dental pulp, located anterior to the horizontal line that goes through the bone-tooth connection, is narrow and approximately the same width as the tooth base; apparently, its posterior border is connective tissue (Fig. 5D).Published as part of Scharcansky, Alexandre & Lucena, Carlos Alberto S., 2008, Phylogenetic assessment of ultrastructural and histological characters of teeth in the Anostomoidea, Hemiodontidae and Parodontidae (Teleostei: Ostariophysi: Characiformes), pp. 36-56 in Zootaxa 1948 (1) on page 40, DOI: 10.11646/zootaxa.1948.1.2, http://zenodo.org/record/523134
Prochilodus lineatus
No full text<i>Prochilodus lineatus</i> (Valenciennes) (Figs. 8 and 9) <p>No bone tissue was identified close to the rows of functional teeth. The replacement teeth are arranged away from the functional row and comprise groups somewhat organized. Each set is enclosed by connective and adipose tissues. The posterior teeth show an earlier development stage when compared to more anterior teeth, and are aligned differently with respect to the functional teeth. Therefore, they show a pre-eruptive rotation. Histologically, the replacement teeth in their final stage show a pattern similar to the functional teeth from the exterior inwards: a narrow enamel layer (light area of tooth, see Figure 9C), demineralized due to the histological preparation process, is surrounded by elongated ameloblasts. Next is the dentin layer. It was not possible to detect the odontoblasts in the sections analyzed. Starting from the enamel layer we see conspicuous periodontal ligaments already fully developed. Finally, the dental papilla (mesenchymal cells) forms an elongated or elliptical area.</p> <p>The functional teeth are connected along the dentin layer to connective tissue by small periodontal ligaments. The dentin layer is evenly narrow all around the teeth. The dental pulp is restricted to the region before the horizontal line that goes through the lip-tooth connection, and bordered in the back by a thick layer of connective tissue.</p>Published as part of <i>Scharcansky, Alexandre & Lucena, Carlos Alberto S., 2008, Phylogenetic assessment of ultrastructural and histological characters of teeth in the Anostomoidea, Hemiodontidae and Parodontidae (Teleostei: Ostariophysi: Characiformes), pp. 36-56 in Zootaxa 1948 (1)</i> on page 42, DOI: 10.11646/zootaxa.1948.1.2, <a href="http://zenodo.org/record/5231341">http://zenodo.org/record/5231341</a>
Caenotropus labyrinthicus MCP
No full text<i>Caenotropus labyrinthicus</i> (Kner) (Figs. 6 and 7) <p>As the members of this family lack dentary teeth, the information below refers to premaxillary teeth.</p> <p>The premaxillary teeth do not show nearby bone tissue. The bone tissue located far from the teeth is compact, without alveoli. The replacement teeth are in a region composed of connective tissue; they are arranged in a single row, and each one is aligned with and located immediately behind each functional teeth and do not show a pre-eruptive rotation. Posterior to the row of functional teeth, there is a conspicuous area of adipose tissue. All replacement teeth have a shape similar to that of the functional teeth. Histologically, replacement teeth in their final stage show a pattern similar to that of functional teeth from the exterior inwards: a thick enamel layer (light area of tooth, see Figure 7C), which because it was totally mineralized was decalcified during histological preparation, surrounded by elongated ameloblasts. Next is the dentin layer. Starting from the enamel layer, we see conspicuous periodontal ligaments already fully developed. Finally, there is a small dental papilla consisting of mesenchymal cells.</p> <p>The functional teeth are connected along the dentin layer to the connective tissue by small periodontal ligaments. The dentin layer is narrow on the tooth sides and thicker in the apical region. The dental pulp located in the tooth basal area is somewhat wider than in the meso-apical region, becoming narrower as it moves inside the connective tissue and apparently bordered in the back by the enamel layer.</p>Published as part of <i>Scharcansky, Alexandre & Lucena, Carlos Alberto S., 2008, Phylogenetic assessment of ultrastructural and histological characters of teeth in the Anostomoidea, Hemiodontidae and Parodontidae (Teleostei: Ostariophysi: Characiformes), pp. 36-56 in Zootaxa 1948 (1)</i> on page 40, DOI: 10.11646/zootaxa.1948.1.2, <a href="http://zenodo.org/record/5231341">http://zenodo.org/record/5231341</a>
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
