1,720,987 research outputs found
Pengaruh Jenis Asam dan Basa pada Pembentukan Senyawa Khitosan dari Limbah Kulit Rajungan
Full text linkThe objective of this research was to known of acid and alkali effect to produced chitosan from rajungan husk. The implemented treatments were including deproteinization, demineralization and deasetylation treatments with several of acid and alkali. The deproteinization were conducted by 3-5 % NaOH and warm to 80o C than 2% HCl or H3PO4. Finally, chitosan produced by deasetylation with 30-40% NaOH. 100 gram substrates were produced 19% rendemen with deasetylation degree (DD) is 29,02%. Test of the chitosan at bakso and fish showed good condition until 48-50 hours. That is influenced by water activity of the materials. Keywords : rajungan husk, deproteinization, demineralization, deasetylation, chitosa
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
KAJIAN KANDUNGAN AMMONIA PADA BUDIDAYA IKAN NILA (Oreochromis niloticus) MENGGUNAKAN TEKNOLOGI AKUAPONIK TANAMAN TOMAT (Solanum lycopersicum)
Full text linkPermasalahn dalam kegiatan budidaya,selain limbah adalah berkurangnya lahan kosong untuk kegiatan budidaya maupun sumber air, Hal ini perlu dicarikan solusi agar kegiatan budidaya sebagai devisa bagi Negara dari sektor non migas dapat terus dilakukan dan mampu menghasilkan produksi dari bidang perikanan. akuaponik yaitu memadukan tanaman hortikultura dan pemeliharaan ikan, merupakan salah satu alternative yang dapat memanfaatkan limbah budidaya ikan dan mampu menghemat penggunaan lahan dan air (Nuryadi et al, 2009). Penelitian ini bertujuan untuk megetahui kandungan Ammonia Media budidaya Ikan Nila (Oreocromis niloticus), mengetahui produksi ikan nila yang dipelihara menggunakan sistem akuaponik tanaman tomat (Solanum lycopersicum). Berdasarkan hasil penelitian menunjukkan bahwa kandungan ammonia pada media dengan menggunakan media akuaponik memiliki nilai terendah A (0.017 mg/l) ,diikuti dengan media resirkulasi tanpa akuaponik B (0.053 mg/l) dan nilai tertinggi ammonia adalah pada media pemeliharaan tanpa akuaponik dan tanpa resirkulasi C (0,061mg/l). Pertambahan bobot terbaik adalah pada perlakuan A (52.56 gr) diikuti dengan Perlakuan B (45.46 gram) dan pertumbuhan terkecil adalah ikan nila dengan Perlakuan C (14.41 gram). Survival Rate ikan nila terbaik adalah pada perlakuan A (93.67%) kemudian ikan nila pada Perlakuan B (92.50%) dan terendah Perlakuan C (72 %). Berdasarkan Uji ANNAVA Media Akuaponik berpengaruh sangat nyata terhadap kandungan ammonia, pertambahan bobot, dan Survival Rate
Kata Kunci : Akuaponik, Nila,Oreocromis niloticus, Solanum lycopersicu
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
Analisis Kualitas Kompos dari Sludge Biogas Feses Kerbau (The Quality Analysis of the Compost of Sludge Biogas Buffalo Feces)
Full text linkPenelitian ini bertujuan untuk mempelajari dan menganalisis kualitas kompos dari sludge biogas feses kerbau pada berbagai rasio C/N. Metode yang digunakan dalam penelitian ini adalah metodeeksperimen menggunakan rancangan acak lengkap, dengan tiga perlakuan (P1 = C/N 25, P2 = C/N 30P3 = C/N 35) dengan enam kali ulangan. Peubah yang diamati adalah kandungan N total, P2O5, K2O.Hasil penelitian menunjukkan bahwa 1) Rasio C/N berpengaruh nyata terhadap kandungan N total,P2O5 dan K2O, 2) Rasio CN 30 menghasilkan kandungan N total, P2O5 dan K2O yang paling tinggi, yakni masing-masing 2,14; 1,70 % dan 4,58%.Kata kunci : feses kerbau, sludgerasio C/N, N, P,
Uji Organoleptik Daging Ayam yang Diberi Ransum yang Mengandung Lumpur Susu Terfermentasi oleh Aspergillus niger (Organoleptic Evaluation of Meat from Broiler Fed Diets Containing Graded Levels of Dairy-Waste Water Solid Fermented by Aspergillus niger)
Full text linkPenelitian ini bertujuan untuk mengetahui respon panelis terhadap daging yangdihasilkan dari ayam broiler yang diberi ransum yang mengandung berbagai tingkat lumpur terfermentasi oleh Aspergillus niger. Penelitian menggunakan metode eksperimen dengan Rancangan Acak Lengkap (RAL). Penelitian ini menggunakan enam tingkat lumpur susu terfermentasi dalam ransum, yaitu R0 (0%); R1 (5%); R2 (10%); R3 (15%); R4 (20%); dan R5 (25%) dengan 20 orang panelis sebagai ulangan. Pengujian organoleptik meliputi warna, aroma, dan tekstur daging broiler bagian dada. Perhitungan statistika dilakukan dengan ANOVA dan dilanjutkan dengan uji Duncan. Hasil penelitian menunjukkan bahwa : pemberian lumpur susu terfermentasi oleh Aspergillus niger sampai tingkat 25% dalam ransum broiler tidak berpengaruh nyata (P>0.05) terhadap warna, bau/aroma, maupun tekstur daging broiler, artinya pemberian ransum yang mengandung lumpur terfermentasi oleh Aspergillus niger sampai tingkat 25 persen dalam ransum ayam broiler tidak menurunkan kualitas daging broiler baik warna, bau/aroma, maupun tekstur daging.Kata Kunci : Lumpur susu terfermentasi, Aspergillus niger, organolepti
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
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