1,720,977 research outputs found
Involvement of FactorXIII-A in fish optic nerve regeneration
Full text linkアダルト哺乳類の中枢神経は一旦損傷を受けると不可逆的ダメージとなり、細胞はアポトーシスに陥り、やがて機能喪失に至る。ところが魚類中枢神経は、損傷後の軸索再生・修復が可能であり、機能も完全に回復する。ここでは、魚類視神経を実験的に損傷し、タンパク架橋酵素であるトランスグルタミネースファミリーの一つ、Factor XIII-A(FXIII-A)遺伝子の発現とその軸索再生への関与について検討した結果、FXIII-A が視神経損傷後いち早く視神経および網膜で活性化され、創傷治癒・視神経軸索再生に深く関与することがわかった。Unlike mammals, fish retinal ganglion cells have the capacity to repair their axons even after optic nerve transection. In the process of fish optic nerve regeneration, a large number of genes have been described as regeneration-associated molecules. Using molecular cloning techniques, we identified some cDNA clones belonging to the transglutaminase (TG) family as upregulation genes, and one of those was Factor XIII A subunit (FXIII-A). FXIII-A is quickly activated after optic nerve lesion and deeply involved in wound healing and optic nerve regeneration.研究課題/領域番号:23618006, 研究期間(年度):2011-04-28 - 2015-03-31出典：研究課題「ゼブラフィッシュ視神経再構築におけるFactorXIIIAの関与とその作用機序」課題番号23618006
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-23618006/23618006seika/)を加工して作成research repor
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
神経再生におけるcellular Factor XIII 活性化機構の解明
Full text linkタンパク架橋酵素であるFactor XIII(FXIII)は、血液だけでなく様々な組織や細胞にも分布が見られる。しかし、血液凝固過程でのトロンビン切断による活性化が組織中でも起こるのか、その活性化機構については不明である。今回、ゼブラフィッシュ視神経を損傷する実験系において、軸索再生過程において酵素活性のあるFXIII A-subunit (FXIII-A) が自然に発現上昇することを利用し、神経組織での活性化機構について調べた。その結果、損傷神経組織ではFXIII-A mRNAの5’領域が一部欠如した短いタイプのものが多数出現し、このことがトロンビンを介さない活性化機構の存在を示唆した。Factor XIII-A (FXIII-A), also known as cellular transglutaminase, plays important roles in mediating cross-linking reactions in various tissues. Previous research has shown that FXIII-A was immediately upregulated in the fish retina and optic nerve after nerve injury. However, the activation mechanism of the FXIII-A remains unclear. Here, we investigated the activation mechanism of the FXIII-A using zebrafish CNS regeneration system. Thrombin mRNA was undetectable in zebrafish optic nerve and retina both before and after optic nerve injury. Sequence analysis of FXIII-A 5'-RACE products showed that most of clones derived from intact retina showed full sequence of FXIII-A, however, many clones derived from injured retina showed short sequences of FXIII-A which lacked exon 1-2 region. Therefore, unlike plasma FXIII-A, activation of FXIII-A in injured retina and optic nerve does not need the cleavage by thrombin, may occur the directly production of activated FXIII-A protein.研究課題/領域番号:26350958, 研究期間(年度):2014-04-01 - 2018-03-31出典：研究課題「神経再生におけるcellular Factor XIII 活性化機構の解明」課題番号26350958
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-26350958/26350958seika/）を加工して作成research repor
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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