1,720,963 research outputs found
Studies on the ontogenny of the digestive system and selected enzyme activity during early life stages of humpback grouper (Cromileptes altivelis) (Valenciennes, 1828)
No full textA study on the development of the digestive system and selected enzymes activity of humpback grouper (Cromileptes altivelis) larvae was conducted from hatching until 40 days after hatching (DAH) by morphological, histological and enzyme assay technique
RESPON HISTO-BIOLOGIS PAKAN PST TERHADAP PENCERNAAN DAN OTAK IKAN KERAPU HIBRID
Get PDFPenelitian ini bertujuan untuk mengetahui pengaruh pakan terhadap perbedaan struktur
histologi organ pencernaan dan otak ikan kerapu hibrid. Ikan uji adalah kerapu hibrid yang
diberi pakan yang diformulasi dengan protein sel tunggal by product hasil samping bir.
Beda dosis dari substitusi protein bahan sejumlah 10%, 20% dan 30% serta pakan kontrol
dengan tanpa substitusi.Variabel yang diamati pada penelitian ini adalah dosis substitusi
serta struktur histologis pencernaan, otak, pertumbuhan dan FCR. Data histologis usus,
hati, pankreas dan otak diamati pada akhir penelitian. Sampel organ diproses menggunakan
metode parafinisasi dan pewarnaan dengan Hematoksilin-Eosin (HE). Pengamatan yang
dilakukan pada preparat awetan histologi diamati dan dianalisa secara deskriptif
menggunakan advanced research microskop secara parsial. Sedangkan data meliputi
pertumbuhan dan FCR dianalisis menggunakan statistik. Hasil penelitian menunjukkan
semakin tinggi dosis yang diberikan pada organ otak tampak adanya pembesaran sel,
sedangkan pada organ hati tampak adanya kerapatan sel vakuola yang semakin renggang,
sedangkan pada organ usus terdapat sel sel berwarna gelap pada ujung villi. Secara statistik
pertumbuhan paling bagus dicapai pada perlakuan kontrol, begitu juga dengan nilai FCR
pakan menghasilkan nilai yang lebih baik. Pemberian pakan dengan substitusi protein
bahan PST dari by product bir dapat mempengaruhi pertumbuhan ikan kerapu hybrid pada
dosis 10% dan semakin rendah jika dosis ditingkatkan, hal ini juga terlihat dari adanya
perkembangan sel yang tidak wajar dalam otak walaupun kemungkinan besar akibat
serangan VNN dan iridoviru
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
DIFERENSIASI ORGAN PENCERNAAN LARVA KERAPU BEBEK TURUNAN KE-3 (F-3) DAN BEBERAPA AKTIVITAS ENZIM YANG TERKAIT
Get PDFPengamatan perkembangan diferensiasi saluran pencernaan larva ikan kerapu bebek F-3 hasil pembenihan induk generasi F-2 telah dilakukan melalui serangkaian pemeliharaan dari umur satu hari setelah menetas (HSM) sampai dengan 40 HSM. Sampel larva diambil setiap hari dari 1 HSM sampai dengan 10 HSM dan dilanjutkan interval tiga hari sampai umur 40 hari. Pakan alami diberikan sesuai dengan standar operasional prosedur (SOP) perbenihan kerapu namun tidak diberikan pengkayaan apapun dalam pakan alaminya. Sampel dianalisis secara histologi dengan staining menggunakan HE dan dianalisis pula aktivitas tripsin dan cimotripsinnya menggunakan teknik enzim assay. Fase yolk sac sampai dengan umur 10 HSM, perkembangan (diferensiasi) saluran pencernaan berkembang sangat pesat. Pada fase ini organ pencernaan larva sudah terbagi dari mulut, esophagus, perut, usus, dan anus namun belum sempurna. Aktivitas tripsin dan cimotripsin sudah terdeteksi pada fase tersebut. Pada umur 13 HSM sampai dengan memasuki fase yuwana (28 HSM) organ pencernaan terutama perut dan usus mulai berkembang. Fase yuwana tercapai lebih lambat daripada larva kerapu bebek dari penelitian sebelumnya yang menggunakan larva turunan F-1 yang diberi pengkayaan pakan, hal ini ditunjukkan dengan terbentuknya gastric gland dan pyloric caeca sebagai indikator saluran pencernaan berfungsi dengan baik baru terjadi pada umur 28 HSM. Informasi yang bisa digaris bawahi dari pengamatan ini adalah bahwa hasil pembenihan kerapu bebek turunan ke-3 sudah bisa dilakukan namun perkembangan organ pencernaan yang cenderung lebih lambat dari turunan F-1-nya. Hal ini kemungkinan disebabkan oleh faktor pengkayaan pakan atau hal lain yang perlu diamati lebih lanjut.
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
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