1,720,969 research outputs found
: Screening of Angiotensin-I Converting Enzyme 17u'bitory Peptides Derived from Acrochaetium sp
No full textPengaruh Suhu Perendaman Terhadap Kualitas Agar-Agar Gracilaria verrucosa
Full text linkRumput laut merupakan salah satu komoditas utama di bidang perikanan dan kelautan di Indonesia. Rhodophyta merupakan salah satu jenis rumput laut banyak ditemukan di perairan Indonesia, seperti spesies Gracilaria verrucosa yang dapat ditemukan di daerah Sidoarjo. G.verrucosa adalah jenis rhodophyta yang mampu menghasilkan agar, sehingga sering dimanfaatkan sebagai bahan utama dalam pembuatan agar-agar. Agar-agar merupakan polisakarida campuran hasil ekstraksi G.verrucosa. Parameter kualitas agar-agar yang baik dapat ditinjau dari total rendemen, kadar sulfat, viskositas, kekuatan gel, gelling and melting point dan spektra infra merah. Untuk memperbaiki kualitas agar-agar tersebut, maka perlu dilakukan perbaikan dalam proses ekstraksi, salah satunya yaitu pada proses perendaman. Perendaman diduga mampu mempengaruhi kualitas agar-agar yang dihasilkan. Dengan suhu perendaman yang berbeda dapat diteliti pengaruhnya terhadap kualitas agar-agar. Perendaman mampu melembutkan dinding sel G.verrucosa yang terdiri dari selulosa, polisakarida, pektin, sakarida sederhana dan agar, sehingga mempermudah proses ekstraksi selanjutnya. Penggunaan suhu perendaman 17,5 oC, 25 oC, dan 32,5 oC didasarkan dari penelitian sebelumya (Kumar dan Fotedar, 2009) yang memperoleh hasil optimum pada suhu 25 oC untuk jenis G.cliftonii. Dan digunakan metode ekstraksi oleh Murdinah et al., (2012) sebagai perlakuan kontrol. Penelitian tentang pengaruh suhu perendaman terhadap kualitas agar-agar Gracilaria verrucosa dilaksanakan pada bulan Januari – April 2014. Rumusan masalah dalam penelitian Skripsi ini adalah menentukan suhu perendaman yang tepat guna meningkatkan kualitas agar-agar G. verrucosa dengan maksud mendapatkan pengaruh suhu perendaman terhadap kualitas agar-agar G.verrucosa yang berguna untuk memperbaiki kualitas agar-agar G.verrucosa dengan perlakuan suhu perendaman yang tepat pada proses ekstraksi sehingga dapat diterapkan di industri dan dapat diterima oleh masyarakat. Materi yang digunakan dalam penelitian ini adalah Gracilaria verrucosa yang dipanen dari tambak di dusun Tanjungsari kecamatan Jabon kabupaten Sidoarjo. Penelitian ini menggunakan metode eksperimen dengan Rancangan Acak Lengkap (RAL) 3 kali ulangan dengan variabel bebas suhu perendaman yang berbeda yaitu suhu 17,5 oC, 25 oC, dan 32,5 oC serta variabel terikat yaitu rendemen, kadar sulfat, viskositas, gel strength, gelling and melting point, dan spektra infra merah. Penelitian ini terdiri dari 2 tahap yaitu ekstraksi agar-agar metode Kumar dan Fotedar (2009) dengan perlakuan suhu perendaman yang berbeda dan ekstraksi agar-agar kontrol dengan menggunakan metode Murdinah et al., (2012). Berdasarkan hasil penelitian tentang Pengaruh Suhu Perendaman Terhadap Kualitas Agar-agar G.verrucosa, dapat diambil kesimpulan bahwa ekstraksi agar-agar G.verrucosa menggunakan suhu perendaman 25 oC menghasilkan kualitas yang lebih baik dibandingkan dengan kontrol
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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