1,723,281 research outputs found
Linked collectors and determiners for: Cosumnoperla Sequoia, A New Species Of Stonefly From The Sierra Nevada, California (Plecoptera: Perlodidae: Isoperlinae).
No full textNatural history specimen data linked to collectors and determiners held within, "Cosumnoperla Sequoia, A New Species Of Stonefly From The Sierra Nevada, California (Plecoptera: Perlodidae: Isoperlinae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/11a4efe9-83ec-450e-9361-9657cfe342bd">https://bionomia.net/dataset/11a4efe9-83ec-450e-9361-9657cfe342bd</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/11a4efe9-83ec-450e-9361-9657cfe342bd">https://gbif.org/dataset/11a4efe9-83ec-450e-9361-9657cfe342bd</a>. Formatted as a Frictionless Data package
Uji Aktivitas Antibakteri Ekstrak Etanolik Daun Sisik Naga (Drymoglossum piloselloides (L) Presl) terhadap Shigella dysenteriae ATCC 9361 dengan Metode Soxhletasi dan Perkolasi
Full text linkLeaves of Drymoglossum piloselloides [L.] Presl. were used as dysentery drug. The experiment was aimed to find out whether soxhletation and percolation extracts of Drymoglossum piloselloides [L.] Presl. leaves had antibacterial activity against Shigella dysenteriae ATCC 9361. Lleaves were dried and then blended to make powder. The extraction method used was soxhletation and percolation methods using ethanol 70% solvent. The obtained extract was evaporated until it was thick, and then the antibacterial activity test was conducted by dilution method against Shigella dysenteriae ATCC 9361. he concentrations of the test solutions were: 100%, 50%, 25%, 12.5%, 6.25%, 3.125%, 1.56%, 0.78%, 0.39%, 0.19%. The result of the experiment showed that soxhletation and percolation extracts had antibacterial activity against Shigella dysenteriae ATCC 9361 test bacteria. There was no difference in antibacterial activity between soxhletation extract and percolation extract against Shigella dysenteriae ATCC 9361 showed by minimum bactericidal concentration i.e. 50% both.Daun sisik naga (Drymoglossum piloselloides [L.] Presl.) dapat digunakan sebagai obat disentri. Penelitian ini bertujuan untuk mengetahui apakah ekstrak soxhletasi dan ekstrak perkolasi daun sisik naga tersebut mempunyai aktivitas antibakteri terhadap Shigella dysenteriae ATCC 9361. Daun sisik naga dikeringkan kemudian dibuat serbuk dengan cara diblender. Metode penyarian yang digunakan adalah metode soxhletasi dan perkolasi dengan pelarut etanol 70%, setelah didapat ekstrak soxhletasi dan perkolasi diuapkan sampai kental, kemudian dilakukan pengujian aktivitas antibakteri dengan metode dilusi terhadap Shigella dysenteriae ATCC 9361. Konsentrasi larutan uji yang digunakan adalah 100%; 50%; 25%; 12,5%; 6,25%; 3,125%; 1,56%; 0,78%; 0,39%; 0,19%. Hasil penelitian menunjukkan ekstrak soxhletasi dan ekstrak perkolasi memiliki aktivitas antibakteri terhadap bakteri uji Shigella dysenteriae ATCC 9361. Uji aktivitas antibakteri antara ekstrak soxhletasi dan ekstrak perkolasi terhadap bakteri uji Shigella dysenteriae ATCC 9361 tidak ada perbedaan yang ditunjukkan dengan konsentrasi bunuh minimum yang sama yaitu 50%
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Uji Aktivitas Antibakteri Ekstrak Etanol, Fraksi n-heksana, Etil Asetat, dan Air dari Daun Turi (Sesbania grandiflora Pers) terhadap Bakteri Shigella dysenteriae ATCC 9361
Full text linkDaun turi (Sesbania grandiflora Pers) merupakan tanaman suku Fabaceae yang dapat ditanam di perkarangan sebagai pagar hidup atau tanaman obat. Kandungan kimia daun turi adalah flavonoid, alkaloid, saponin, dan tanin. Penelitian ini bertujuan untuk mengetahui aktivitas ekstrak etanol, fraksi n-heksana, etil asetat dan air dari daun turi (Sesbania grandiflora Pers) sebagai antibakteri terhadap Shigella dysenteriae ATCC 9361.Uji aktivitas antibakteri ekstrak etanol, fraksi n-heksana, fraksi etil asetat dan fraksi air terhadap Shigella dysenteriae ATCC 9361 menggunakan metode dilusi dan difusi. Konsentrasi fraksi yang digunakan untuk metode dilusi adalah 50%; 25%; 12,5%; 6,25%; 3,12%; 1,56%; 0,78%; 0,39%; 0,19%; 0,09%. Konsentrasi fraksi yang digunakan untuk metode difusi adalah 6,25%; 4,68% dan 3,12%. Fraksi paling aktif diuji kandungan kimia secara Kromatografi Lapis Tipis (KLT). Konsentrasi Bunuh Minimum (KBM) aktivitas antibakteri ekstrak etanol, fraksi n-heksana, fraksi etil asetat dan fraksi air terhadap Shigella dysenteriae ATCC 9361 berturut-turut adalah 0,78%, 12,5%, 6,25% dan 50%. Diameter zona hambat fraksi teraktif etil asetat terhadap Shigella dysenteriae ATCC 9361 adalah 18,17 mm pada konsentrasi 6,25%. Hasil identifikasi KLT menunjukkan fraksi etil asetat mengandung senyawa flavonoid dan alkaloid
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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