124,747 research outputs found
Ophryotrocha mammillata Ravara, Marcal, Wiklund & Hilario 2015
No full text<i>Ophryotrocha mammillata</i> Ravara, Marçal, Wiklund & Hilário, 2015 <p> <i>Ophryotrocha mammillata</i> Ravara <i>et al.</i>, 2015: 5, figs 4–12 (type locality: Setúbal Canyon, W Portugal, NE Atlantic).</p> Material examined <p>MOROCCO • 2 specs (ethanol), 1 spec. (slide preparation); GoC, Mercator MV, 35°17.916′ N, 06°38.709′ W; 354 m depth; 2 Mar. 2008; Stn 64PE284_12750W; wood substrata; DBUA0002279.01 • 1 spec. (ethanol); GoC, Meknès MV; 34°59.091′ N, 07°04.424′ W; 698 m depth; 20 May 2009; Stn B09- 14b_03A; alfalfa substratum; DBUA0002280.01 • 1 spec. (ethanol); GoC, Darwin MV; 35°23.523′ N, 07°11.513′ W; 1100 m depth; 19 May 2009; Stn B09-14b_02W; wood substratum; DBUA0002280.02 •</p> <p>2 specs (formalin), 3 specs (paragenophores, in ethanol); same collection data as for preceding; 19 May 2009; Stn B09-14b_02A; alfalfa substrata; DBUA 0002280.03.</p> <p> <b>Additional material</b></p> <p>PORTUGAL • 2 specs (ethanol); WIM, Setúbal Canyon; 38°16.856′ N, 09°06.734′ W; 1000 m depth; 22 Aug. 2012; on bone material from an experimentally deployed cow carcass; DBUA0001555.04.</p> Remarks <p> This species was recently described from an experimentally deployed mammal carcass for a similar amount of time (approximately 18 months) at the Setúbal Canyon (WIM) (Ravara <i>et al.</i> 2015). The morphological identification was confirmed with molecular analyses (Fig. 2). This study extends its distribution to the Gulf of Cadiz where it occurred associated with experimentally deployed wood and alfalfa substrata. Curiously, <i>O. mammillata</i> was not found in the wood-fall collected at Estremadura Spur (WIM), a site very close to its type locality. It is worth mentioning here that in the GoC only five specimens of <i>O. mammillata</i> were retrieved, compared to 198 specimens previously reported from the Setúbal Canyon (Ravara <i>et al</i>. 2015).</p> Ecology and distribution <p> NE Atlantic: from Setúbal Canyon (West Iberian Margin) to the Gulf of Cadiz. Found in experimentally deployed organic falls (mammal carcasses, wood and alfalfa substrata), at a depth of 354–1100 m (Ravara <i>et al.</i> 2015; present study).</p>Published as part of <i>Ravara, Ascensão, Wiklund, Helena & Cunha, Marina R., 2021, Four new species and further records of Dorvilleidae (Annelida, Polychaeta) from deep-sea organic substrata, NE Atlantic, pp. 44-81 in European Journal of Taxonomy 736</i> on pages 63-64, DOI: 10.5852/ejt.2021.736.1251, <a href="http://zenodo.org/record/4570204">http://zenodo.org/record/4570204</a>
Australaugeneria iberica Ravara & Cunha, 2016, sp. nov.
No full textAustralaugeneria iberica sp. nov. Figure 2 Type material. Atlantic Ocean. Gulf of Cadiz: Carlos Ribeiro MV, St JC 10 _051, ca. 2230 m, 3 incompl. spms (NHMUK 2016.347, holotype; DBUA 0001726.01, paratypes). Description. Examined specimens incomplete, only one specimen with one elytron. Larger fragment with 18 segments, 5.09 mm long and 1.09 / 2.69 mm wide without and with parapodia, respectively. Body without pigmentation pattern or dorsal tubercules, compressed dorsoventrally, gradually tapering anteriorly and posteriorly. Elytra scars on segments 2, 4, 5, 7, alternating to the end of fragment. Elytra large, covering the dorsum, delicate and transparent, without tubercles or papillae. Prostomium rounded, bilobed anteriorly, without cephalic peaks; eyes not visible (Fig. 2 A). Median antenna very long (reaching 3 rd chaetiger), smooth, gradually tapering distally, ceratophore inserted in anterior notch. Lateral antennae very short, piriform, ceratophores inserted ventrally. Palps stout, smooth, gradually tapering, about half the length of median antenna. First segment not visible dorsally, without chaetae; two pairs of tentacular cirri, dorsal cirri about as long as median antenna with large ceratophore, ventral cirri much shorter, similar in length to palps, with shorter ceratophore. Parapodia of buccal segment (segment 2) not modified (Fig. 2 B); ventral cirri similar in length to the following ones; hooked chaetae present. Pharynx not observed. Parapodia of median segments relatively long, sub-biramous. Notopodia with long projecting acicular lobe, extending to near distal end of neuropodial lobes or beyond in posterior parapodia (Fig. 2 C, D). Dorsal cirri much longer than parapodia including chaetae, smooth, tapering gradually to filiform tips, present on segments without elytra, attached at the base of notopodia. Neuropodia deeply incised dorsally and ventrally, with longer bilobed prechaetal lobes, and shorter rounded to slightly bilobed postchaetal lobes. Ventral cirri slightly longer than neuropodia, smooth, gradually tapering to filiform tips. Notochaetae stout, spinulose, with entire tips, present from segment three (Fig. 2 F–H). Neurochaetae of segment two stout hooks (Fig. 2 E); remaining parapodia with two types of neurochaetae: upper group slightly slender, spinulose, with bidentate tips (Fig. 2 I, J); lower group stouter, falcate, smooth or faintly spinous (Fig. 2 K, L). Pygidium not observed. Type locality. Gulf of Cadiz (NE Atlantic), Carlos Ribeiro mud volcano, 35 ˚ 47.102 'N, 08˚ 25.309 'W, 27 May 2007, JC 10 Leg 1 (RRS James Cook). Distribution. Northeast Atlantic (Gulf of Cadiz). Habitat. In association with one alcyonarian colony (cf. Acanella sp.), collected at the flank (no methane seepage detected) of Carlos Ribeiro MV, at 2230 m water depth. Etymology. The species name refers to its type locality on the Iberian margin. Remarks. The genus Australaugeneria includes three species, A. rutilans (Grube, 1878) and A. michaelseni Pettibone, 1969 a, both from southwest Australia, 11–16 m depth, and A. pottsi Pettibone, 1969 b from the Maldives Islands. Recently, A. rutilans was also reported from the Red Sea (Wehe, 2006). Australaugeneria iberica sp. nov. differs from the other three species in having neuropodial hooks on segment two only (instead of two and three) and prechaetal lobes of the first parapodia are not enlarged or hood-like. Both characters are diagnostic of the genus and its diagnosis is emended here. Further differences between the four species are highlighted in Table 2. This is the first deep-sea species of the genus, as well as the first record for the Atlantic Ocean.Published as part of Ravara, Ascensão & Cunha, Marina R., 2016, Two new species of scale worms (Polychaeta: Aphroditiformia) from deep-sea habitats in the Gulf of Cadiz (NE Atlantic), pp. 442-450 in Zootaxa 4097 (3) on page 445, DOI: 10.11646/zootaxa.4097.3.12, http://zenodo.org/record/25875
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
FIGURE 3. Aglaophamus elamellatus. A. Dissected pharynx, dorsal view. B in Nephtyidae (Annelida, Polychaeta) from southern Europe 2682
No full textFIGURE 3. Aglaophamus elamellatus. A. Dissected pharynx, dorsal view. B. Detail of pharynx subterminal papillae. C. Jaw. D. Prostomium and anterior chaetigers, dorsal view. E. Left neuropodium of chaetiger 1. F. Right parapodium of chaetiger 10, anterior view. G. Same, posterior view. H. Right parapodium of chaetiger 20, anterior view. I. Same, posterior view. J. Postacicular chaeta from chaetiger 15. K. Preacicular chaeta from chaetiger 15.Published as part of Ravara, Ascensão, Cunha, Marina R. & Pleijel, Fredrik, 2010, Nephtyidae (Annelida, Polychaeta) from southern Europe 2682, pp. 1-68 in Zootaxa 2682 (1) on page 12, DOI: 10.11646/zootaxa.2682.1.1, http://zenodo.org/record/534623
FIGURE 9. Micronephthys stammeri. A. Pharynx, dorsal view. B. Jaw. C in Nephtyidae (Annelida, Polychaeta) from southern Europe 2682
No full textFIGURE 9. Micronephthys stammeri. A. Pharynx, dorsal view. B. Jaw. C. Prostomium and anterior chaetigers, dorsal view. D. Dorsal (left) and ventral (right) cirrus from median parapodia. E. Barred chaeta from notopodia of chaetiger 1. F. Postacicular chaeta of median chaetiger. G. Lyriform chaeta. H. Acicula from median chaetiger.Published as part of Ravara, Ascensão, Cunha, Marina R. & Pleijel, Fredrik, 2010, Nephtyidae (Annelida, Polychaeta) from southern Europe 2682, pp. 1-68 in Zootaxa 2682 (1) on page 28, DOI: 10.11646/zootaxa.2682.1.1, http://zenodo.org/record/534623
Effect of thalidomide on the skeletal muscle in experimental heart failure
No full textEur J Heart Fail. 2002 Aug;4(4):455-60.
Effect of thalidomide on the skeletal muscle in experimental heart failure.
Vescovo G, Ravara B, Angelini A, Sandri M, Carraro U, Ceconi C, Dalla Libera L.
Internal Medicine, Adria Hospital, Italy. [email protected]
Abstract
BACKGROUND:
Tumour Necrosis Factor alpha (TNFalpha) has been shown to contribute to heart failure (CHF) progression.
AIMS:
We have tried to antagonise the detrimental effects of TNFalpha on skeletal muscle apoptosis, by using thalidomide, a drug that inhibits its biosynthesis.
METHODS:
CHF was induced in 20 rats by injecting monocrotaline, which determines right ventricle (RV) failure. After 2 weeks, when CHF developed, 12 rats were treated with thalidomide 3.5.mg/kg per day for 2 weeks. Eight had saline and served as CHF controls.
RESULTS:
Thalidomide failed to decrease TNFalpha and its second messenger sphingosine (SPH), but was able to prevent the shift toward the fast myosin heavy chains. In the Tibialis Anterior muscle of the thalidomide group, the degree of atrophy, the number of apoptotic nuclei and the levels of caspases, were similar to those of the CHF controls.
CONCLUSIONS:
Thalidomide, at the doses used in this study, which are the same employed for the treatment of tubercolosis, leprosy, AIDS and cancer in humans, did not lower either TNFalpha or SPH and only marginally influenced the apoptosis-induced muscle atrophy. Since other TNFalpha blockers are under investigation for improving the clinical status of patients with CHF, the present data could be relevant in the design of randomised clinical trials in humans.
PMID:
12167383
[PubMed - indexed for MEDLINE
FIGURE 17. Nephtys hombergii. A. Pharynx, dorsal view. B. Jaw. C in Nephtyidae (Annelida, Polychaeta) from southern Europe 2682
No full textFIGURE 17. Nephtys hombergii. A. Pharynx, dorsal view. B. Jaw. C. Prostomium and anteriormost chaetigers, dorsal view. D. Right parapodium of chaetiger 1, posterior view. E. Left parapodium of chaetiger 10, anterior view. F. Left parapodium of chaetiger 20, anterior view. G. Left parapodium of chaetiger 40, anterior view. H. Left parapodium of chaetiger 80, anterior view. I. Preacicular chaeta from chaetiger 40. J. Postacicular chaeta from chaetiger 40.Published as part of Ravara, Ascensão, Cunha, Marina R. & Pleijel, Fredrik, 2010, Nephtyidae (Annelida, Polychaeta) from southern Europe 2682, pp. 1-68 in Zootaxa 2682 (1) on page 47, DOI: 10.11646/zootaxa.2682.1.1, http://zenodo.org/record/534623
FIGURE 3 in Two new species of scale worms (Polychaeta: Aphroditiformia) from deep-sea habitats in the Gulf of Cadiz (NE Atlantic)
No full textFIGURE 3. Pholoe petersenae sp. nov. Paratype (NHMUK2016.349). A—Anterior end, dorsal view B—Same, ventral view C—Median parapodium, dorsal view, showing stylodes and globular papillae D—Posterior elytron, dorsal view E—Detail of elytral fringing papilla F—Notochaetae G—Neurochaetae. Scale bars (µm): A, B, D=100, C, E=50, F, G=25.Published as part of Ravara, Ascensão & Cunha, Marina R., 2016, Two new species of scale worms (Polychaeta: Aphroditiformia) from deep-sea habitats in the Gulf of Cadiz (NE Atlantic), pp. 442-450 in Zootaxa 4097 (3) on page 448, DOI: 10.11646/zootaxa.4097.3.12, http://zenodo.org/record/25875
The skull of Stephanorhinus kirchbergensis (Jager, 1839) (Mammalia, Rhinocerotidae) from Spinadesco (Cremona, Lombardia, Northern Italy): morphological analyses and taxonomical remarks e an opportunity for revising the three other skulls from the Po Valley
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