1,720,954 research outputs found
STUDI KARAKTERISTIK MORFOLOGI, FISIOLOGI, DAN BIOKIMIA PADA BENIH SORGUM (Sorghum bicolor L.) YANG TELAH DI INVIGORASI
Full text linkFaktor pembatas yang mempengaruhi produksi sorgum di Indonesia adalah cepatnya benih sorgum mengalami kemunduran, untuk itu perlu dilakukan invigorasi salah satunya dengan cara hidrasi-dehidrasi. Tujuan penelitian ini adalah untuk mengetahui perubahan morfologi, fisiologi, dan biokimia benih sorgum yang telah diberi perlakuan invigorasi dengan hidrasi-dehidrasi. Percobaan ini menggunakan Rancangan Acak Lengkap (RAL) dengan 3 perlakuan dan 4 ulangan, dilaksanakan di Laboratorium Ilmu Teknologi Benih, Laboratorium Fitopatologi Fakultas Pertanian, Laboratorium Kopertis Wilayah X (Sumatera Barat, Riau, Jambi, dan Kepulauan Riau), dan Laboratorium Kimia UNPKM9, dari bulan Januari sampai April 2019. Percobaan ini terdiri dari tingkatan mutu benih sorgum. Data hasil pengamatan dianalisis dengan uji F taraf 5%. Apabila berbeda nyata dilanjutkan dengan uji Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian menunjukkan bahwa: (1) hidrasi-dehidrasi mampu merubah morfologi benih sorgum yang bermutu rendah dari benih yang terlihat kusam ditandai dengan banyak bintik coklat menjadi segar, mengkilat, namun masih terdapat sedikit bintik coklat; (2) hidrasi-dehidrasi mampu meningkatkan vigor dan viabilitas benih sorgum yang telah mengalami kemunduran. Dari vigor 54,5% menjadi 70,5%, dari viabilitas 55% menjadi 75%; (3) hidrasi-dehidrasi mampu meningkatkan aktivitas enzim α-amilase dan laju respirasi kecambah sorgum yang telah mengalami kemunduran. Dari aktivitas enzim α-amilase 0,0009mikromol menjadi 0,00148mikromol, dari laju respirasi 67,434mgCO2 menjadi 82,412mgCO2.
Kata kunci: kemunduran benih, hidrasi-dehidrasi, vigor, viabilita
ININVIGORASI DENGAN HIDRASI-DEHIDRASI UNTUK MENINGKATKAN MUTU FISIOLOGIS BENIH SORGUM(Sorghum bicolor L.)
Full text linkFaktor pembatas yang mempengaruhi produksi sorgum di Indonesia adalah cepatnya benih sorgum mengalami kemunduran, untuk itu perlu dilakukan invigorasi salah satunya dengan cara hidrasi-dehidrasi. Tujuan dari penelitian ini adalah untuk mengetahui bahwa invigorasi dengan metode hidrasi-dehidrasi dapat memperbaiki mutu fisiologis benih sorgum dan untuk mengetahui perlakuan yang lebih tepat antara perendaman dan pelembapan dalam metode hidrasi-dehidrasi terhadap mutu fisiologis benih sorgum. Percobaan ini terdiri atas dua seri percobaan (perendaman dan pelembapan), yang menggunakan Rancangan Acak Lengkap (RAL) dengan 7 perlakuan dan 3 ulangan dilaksanakan di Laboratorium Ilmu dan Teknologi Benih dan Laboratorium Fisiologi Tumbuhan, Universitas Andalas dari Januari sampai April 2018. Percobaan ini terdiri dari tingkatan lamanya waktu hidrasi dengan cara perendaman dan pelembapan serta lama waktu dehidrasi. Data hasil pengamatan di analisis dengan uji F taraf nyata 5%. Apabila berbeda nyata dilanjutkan dengan uji Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian menunjukkan bahwa hidrasi-dehidrasi mampu meningkatkan vigor dan viabilitas benih sorgum yang telah mengalami kemunduran, dari persentase perkecambahan 48, 667% menjadi 79,33%. Hidrasi-dehidrasi memberikan pengaruh positif terhadap daya berkecambah normal, daya berkecambah abnormal, benih mati, potensi tumbuh maksimum, perkecambahan hitung pertama, nilai indeks, dan uji muncul tanah. Hidrasi dengan cara perendaman selama 1 jam dan dehidrasi dengan oven 40C selama 6 jam memberikan vigor dan viabilitas yang terbaik
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
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
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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