180,762 research outputs found
Roeseliana Zeuner 1941
No full textGenus <i>Roeseliana</i> Zeuner, 1941 <p> TYPE SPECIES. — <i>Locusta roeselii</i> Hagenbach, 1822, by original designation.</p>Published as part of <i>Lemonnier-Darcemont, Michèle & Darcemont, Christian, 2023, New data on the distribution of the genus Roeseliana Zeuner, 1941 (Orthoptera, Tettigoniidae, Tettigoniinae) in the southwestern Balkans, with description of R. epirotica n. sp., pp. 445-450 in Zoosystema 45 (14)</i> on page 446, DOI: 10.5252/zoosystema2023v45a14, <a href="http://zenodo.org/record/8200298">http://zenodo.org/record/8200298</a>
Roeseliana Zeuner 1941
No full textKEY TO SPECIES OF <i>ROESELIANA</i> ZEUNER, 1941 IN THE SOUTHWESTERN BALKANS <p>Females</p> <p> 1. Sternum 6 and 7 with bumps................................................................................. <i>R. bispina</i> (Bolivar, 1899)</p> <p>— Sternum 6 and 7 not modified.................................................................................................................... 2</p> <p> 2. Subgenital plate trapezoidal in shape, wider than high, the lobes truncated horizontally. Narrow and shallow excision between the two lobes............................................................................................ <i>R. epirotica</i> n. sp.</p> <p>— Subgenital plate widened with lobes slightly pointed. Deep and large excision of the subgenital plate......... 3</p> <p> 3. Lobes of subgenital plates almost triangular in shape. Excision of the subgenital plate reaching beyond the middle.............................................................................................................. <i>R. roeselii</i> (Hagenbach, 1822)</p> <p> — Lobes more rounded on external part. Excision of the subgenital plate reaching at most to the middle...................................................................................................................................... <i>R. ambitiosa</i> (Uvarov, 1924)</p> <p>Males</p> <p> 1. Last tergite indented over a narrow width. Internal tooth of cerci longer than width of cercus at the point of insertion of the tooth. Tooth bent forward...................................................................................... <i>R. roeselii</i></p> <p>— Last tergite indented over a large width. Internal tooth of cerci as most as long as the width of cercus at the point of insertion of the tooth. Tooth not bent, more rounded.................................................................... 2</p> <p> 2. Titillators slightly curved............................................................................................................. <i>R. ambitiosa</i></p> <p>— Titillators strongly curved with the apex in the shape of a beak................................................................... 3</p> <p> 3. A very few number of spines, only located on the apex of the titillators............................... <i>R. epirotica</i> n. sp.</p> <p> — A larger number of spines on the titillators, from the base to the apex............................................ <i>R. bispina</i></p>Published as part of <i>Lemonnier-Darcemont, Michèle & Darcemont, Christian, 2023, New data on the distribution of the genus Roeseliana Zeuner, 1941 (Orthoptera, Tettigoniidae, Tettigoniinae) in the southwestern Balkans, with description of R. epirotica n. sp., pp. 445-450 in Zoosystema 45 (14)</i> on page 449, DOI: 10.5252/zoosystema2023v45a14, <a href="http://zenodo.org/record/8200298">http://zenodo.org/record/8200298</a>
Cs10Ta29.27O78
No full textSingle crystals of caesium tantalate(V), Cs10Ta29.27O78, were obtained as a serendipitous product in a welded tantalum ampoule by a blank reaction of CsBr and bismuth subnitrate [Bi5O(OH)9(NO3)4] with the container material. The crystal structure of the title compound is made up of a three-dimensional framework constituted by two types of layers, viz. (Ta6O15)n and (Ta3O9)n, parallel to (001), which are linked together by TaO6 octahedra (3m. symmetry) along [001]. This framework has cavities where three independent Cs+ ions (3m. and 6m2 symmetry, respectively) are located. The compound reveals a Ta deficiency at one trigonal prismatic coordinated site (6m2 symmetry). The composition of the title compound was verified by energy-dispersive X-ray analysis of single crystals
Roeseliana Zeuner 1941
No full textGenus <i>Roeseliana</i> Zeuner, 1941 Morphological analysis Characters of the genus <i>Roeseliana</i> <p> The genus <i>Roeseliana</i> was described by Zeuner (1941), who named it after the Austrian entomologist August Johann R̂sel von Rosenhof. However, several authors preferred to maintain <i>Roeseliana</i> as subgenus of the genus <i>Metrioptera</i> Wesmael, 1838. More recently, Massa & Fontana (2011) carried out a revision of Platycleidini and raised again <i>Roeseliana</i> to generic level. According to previous authors (Zeuner 1941; Massa & Fontana 2011), these are the characters of the genus: head slightly broader than long, ratio maximum width/length of head (from vertex to clipeus): 1.2–1.3. Brachypterous, rarely holopterous, pronotum flat, just depressed, margins rounded, humeral excision just evident, keel present in the metazona; ♀ subgenital plate large, bilobate, at the sides not touching the ovipositor; ovipositor short and clearly curved, somewhat angular at 1/3 from the base; ♀ VIIth sternite modified or not; hind femora/pronotum length ♁: 2.7–3.5, ♀: 2.7–3.6; ♁ Xth tergite with very broad processes separated by an incision, long cylindrical cerci, with a pre-apical inner spine. Colour of lateral lobes of the pronotum greyish bordered with a whitish stripe.</p> <p> <b>Diagnosis.</b> Tenth tergite of male with very broad anal segment, rounded cerci and short ovipositor are useful characters to separate <i>Roeseliana</i> from <i>Metrioptera</i> and <i>Bicolorana</i> Zeuner, 1941; with the latter <i>Roeseliana</i> shares the female subgenital plate not touching the ovipositor.</p> Ovipositor— Figs. 1–2, Table 2 <p> The shape of the ovipositor is fairly variable, but we could find taxa/populations with fine ovipositor (<i>R. pylnovi</i>, <i>R. roeselii</i>, <i>R. azami minor</i> from Lombardy, Piedmont and Emilia-Romagna, <i>R. ambitiosa</i>), and those with deeper ovipositor (<i>R. azami</i>, <i>R. azami minor</i> from Tuscany and Marche, <i>R. brunneri</i> and <i>R. bispina</i>). However, the ovipositor angle resulted also variable in the different taxa/populations, smaller in <i>R. pylnovi</i>, <i>R. oporina</i>, <i>R. azami</i>, <i>R. azami minor</i> from Lombardy, Piedmont, Emilia-Romagna and Tuscany, <i>R. brunneri</i> and <i>R. bispina</i>, bigger in others, namely <i>R. roeselii</i>, <i>R. azami minor</i> from Marche and <i>R. ambitiosa</i>.</p> Stridulatory file— Fig. 3, Table 2 <p> We describe preliminary the stridulatory file of different taxa/populations, that are very similar in their structure (Fig. 3). The length is ca. 1.2 mm, while the depth may range from 0.20 to 0.35 mm. Stridulatory file is a little arched, the total number of teeth ranges between 40 and 80 (<i>R. brunneri</i>: ca. 70–80 with 15 central larger; <i>R. azami minor</i> from Tuscany: ca. 50 with 15 central larger; <i>R. azami minor</i> from Piedmont: ca. 40, with 15 central larger; <i>R. azami</i>: ca. 45, more or less of the same size; <i>R. roeselii</i>: ca. 50, with 12–13 central larger teeth; <i>R. ambitiosa</i>: ca. 50 with at least 40 teeth of more or less the same size and a few very small teeth in the proximal part; <i>R. bispina</i>: ca. 60, more or less of the same size; <i>R. pylnovi</i>: ca. 50, with 12–13 central larger). Generally, the stridulatory file in its proximal part bears very small teeth (about 15–20), dense, decreasing in size and evenly spaced, the central part is composed of ca. 12–15 widely spaced larger teeth (with some exceptions, like in <i>R. azami</i>, <i>R. bispina</i> and <i>R. ambitiosa</i>), the distal part is composed of about 8–10 very small teeth. The differences are noted in Table 2.</p> Female subgenital plate— Figs. 8, 9, Table 2 <p> The ratio length to width of the female subgenital plate resulted to be maximum in <i>R. pylnovi</i> (2.8), followed by that of <i>R. roeselii</i> (2.0–2.1), <i>R. azami minor</i> from Marche (2.1–2.2), <i>R. oporina</i> (1.8), <i>R. azami minor</i> from Lombardy, Piedmont and Emilia–Romagna (1.8–2.2), <i>R. brunneri</i> (1.7–1.9), <i>R. azami</i> (1.7), <i>R. azami minor</i> from Tuscany (1.7), <i>R. bispina</i> (1.7) and <i>R. ambitiosa</i> (1.5). However, other differences in the shape of the apical tips of the subgenital plate are evident.</p>Published as part of <i>Massa, Bruno, Tagliavia, Marcello, Buzzetti, Filippo Maria, Fontana, Paolo, Carotti, Giovanni, Bardiani, Marco, Leandri, Fausto, Scherini, Roberto & Verde, Gabriella Lo, 2023, A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation, pp. 351-400 in Zootaxa 5270 (3)</i> on pages 356-357, DOI: 10.11646/zootaxa.5270.3.1, <a href="http://zenodo.org/record/7859886">http://zenodo.org/record/7859886</a>
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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
Letter from R. R. Zellick, Assistant Trust Officer, Anglo California National Bank of San Francisco, to Joseph R. Goodman, October 2, 1942
No full textLetter from R. R. Zellick, Assistant Trust Officer at The Anglo California National Bank of San Francisco, to Joseph R. Goodman, regarding property owned by Dave Tatsuno. Zellick mentions a dispute between current tenants and Tatsuno, and that Tatsuno has asked Goodman to help locate trustworthy tenants.Personal correspondence, organizational records, government documents, publications, and other papers created or collected by Joseph R. Goodman documenting the forced removal and incarceration of Japanese Americans during World War II, as well as organized resistance to incarceration. Included in the collection are records of the Japanese Young Men's Christian Association and the Japanese American Citizens' League in San Francisco, including papers of the Japanese YMCA's executive secretary Lincoln Kanai; Sakai family papers; Goodman's correspondence to and from Japanese American incarcerees, organizations opposing forced removal and incarceration of Japanese Americans, the War Relocation Authority, and others; publications, photographs, and ephemera from the Topaz Relocation Center, where Goodman taught high school; War Relocation Authority records and publications; and newspaper clippings, pamphlets, and reports about forced removal and incarceration created by various government, religious, and civic organizations, in California and nationwide
Colorectal Cancer Stem Cells: From the Crypt to the Clinic
No full textSince their first discovery, investigations of colorectal cancer stem cells (CSCs) have revealed some unexpected properties, including a high degree of heterogeneity and plasticity. By exploiting a combination of genetic, epigenetic, and microenvironmental factors, colorectal CSCs metastasize, resist chemotherapy, and continually adapt to a changing microenvironment, representing a formidable challenge to cancer eradication. Here, we review the current understanding of colorectal CSCs, including their origin, relationship to stem cells of the intestine, phenotypic characterization, and underlying regulatory mechanisms. We also discuss limitations to current preclinical models of colorectal cancer and how understanding CSC plasticity can improve the development of clinical strategies
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