1,720,954 research outputs found
ANALISIS STATUS TAKSONOMI POHON ANDALAS (Morus macroura Miq.) DENGAN MENGGUNAKAN Internal Transcribed Spacer (ITS)
Get PDFABSTRAK
Penelitian tentang Analisis Studi Taksonomi Pohon Andalas (Morus macroura Miq.) dengan Menggunakan Internal Transcribed Spacer (ITS) telah dilakukan dari bulan November 2017 hingga April 2018 di Herbarium ANDA dan Labor Genetika & Biomolekuler Jurusan Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas, Padang. Penelitian ini menggunakan metoda koleksi langsung di lapangan dan analisis molekuler. Pohon Andalas (Morus macroura) asli Sumatera Barat disekuensing dan dikombinaskan dengan 4 sampel Morus macroura Himalaya mulberry dari data genbank serta Morus nigra sebagai outgroup. Analisis pohon kekerabatan dengan menggunakan progam MEGA6 untuk melihat jarak genetik dan klaster, serta analisis haplotype dengan program DNA sequence polymorphism 5.10. Hasil dari penelitian ini bahwa Morus macroura asli Sumatera Barat berbeda dengan Himalaya mulberry.
Kata kunci : Andalas, ITS, Himalaya mulberry, Morus macrour
KARAKTERISASI MOLEKULER TUMBUHAN DIOECIOUS POHON ANDALAS (Morus macroura Miq.) MENGGUNAKAN SEQUENCE- RELATED AMPLIFIED POLYMORPHISM (SRAP)
Get PDFMulberry Sumatera (Morus macroura var. Macroura) merupakan maskot flora (identitas) Sumatera Barat. Klarifikasi jenis kelamin (sex) individu dan variasi genetik diperlukan untuk pelestarian spesies. Sistem penanda SRAP (Sequence Related Amplified Polymorphism) adalah salah satu alat molekuler yang kuat untuk mengklarifikasi jenis kelamin individu dan memperkirakan keragaman genetik spesies tanaman. Tujuan dari penelitian ini adalah untuk menguji individu jantan dan betina pada pohon Andalas (Morus macroura) dan menganalisis variasi genetiknya. Lima belas individu (aksesi) Morus macroura dari tiga lokasi di Sumatera Barat (Limau Manis, Padang, Lubuak Gadang, Solok Selatan dan Andaleh, Tanah Datar) dikumpulkan untuk pengambilan sampel DNA. Kombinasi tujuh primer digunakan untuk mengamplifikasi lima belas sampel DNA. Pita spesifik untuk jenis kelamin diperiksa pada individu terpilih, dan analisis variasi genetik dengan empat parameter : Jumlah alel (na), Jumlah alel efektif (ne), Keragaman Gen (h); Indeks Diversity Shannon (I). Dari uji PCR didapatkan hasil amplifikasi sampel DNA sebanyak 50 fragmen menggunakan tujuh kombinasi primer. Jumlah fragmen terbanyak ditemukan pada kombinasi primer B dan E. Pita spesifik pada fragmen 20 bp dan 30 diketahui dapat digunakan untuk membedakan jenis kelamin individu pohon Andalas. Variasi genetik Morus macroura tergolong rendah (na= 1.540; ne= 1.273;h= 0.168; dan I= 0.259). Keragaman genetik Populasi Limau Manis (h = 0,241) lebih tinggi dibandingkan populasi Andaleh (h= 0,148) dan Lubuak Gadang (h= 0,166)
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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