1,720,965 research outputs found
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
Development of novel drug leads based on rare tropical resources
Get PDFOver 50 novel natural products were isolated from phytochemically untouched rainforest plants, elucidated their chemical structure, and evaluated for antiproliferative activity against tumor cell lines. The synthetic routs of bioactive natural products were developed, and various derivatives were synthesized. The structure-activity relationships and their mechanisms of action of bioactive derivatives were also investigated.植物化学的な精査が行われていない熱帯雨林産植物8種より、ユニークな化学構造を含む50種以上の新規天然物を単離精製し、それらの化学構造を決定した。さらに、有望な抗腫瘍活性が認められた天然物5種については、全合成ルートの開発、誘導体合成による構造活性相関研究、作用機序の解明の一連の研究を行い、それぞれについて創薬シードとしての可能性を提示した。研究課題/領域番号:18H02583, 研究期間(年度):2018-04-01 - 2022-03-31出典：研究課題「希少熱帯資源から新規創薬リードへの展開」課題番号18H02583
（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/ja/report/KAKENHI-PROJECT-18H02583/18H02583seika/ ）を加工して作成金沢大学医薬保健研究域薬学系research repor
Chemical biology of MDR cancer selective cytotoxicity using natural product derivatives
Get PDF本研究は、多剤耐性(MDR)がんの克服を目指して独自に開発した天然物誘導体を用いた新たな創薬化学的アプローチである。バンレイシ科植物から単離された非定型フラボノイド誘導体であるTEDBは、MDRがん選択的に作用する非常に興味深い生理活性を示す。創薬化学的に合成したTEDB誘導体を用いた生理活性解析を通して、MDRがんにも有効なこれまでになかったがん細胞分裂特異的阻害化合物を見出した。得られた知見を元に、新規抗腫瘍活性フラボンをデザイン・合成し、有望な抗がん創薬シードの開発に成功した。TEDBの作用機序解析により、MDRがん細胞内に特徴的な標的タンパク質候補とその作用機序の一端を見出した。TEDB, a derivative of natural flavonoid desmosdumotin B, selectively inhibits multidrug resistant (MDR) tumor cell growth without any cytotoxicity against normal cells as well as non-MDR cells. Despite its unique antiproliferative activity, the mechanism of action is totally unclear. Using medicinal chemistry as well as chemical biological approaches of TEDB derivatives, we have discovered that TEDB with an artificial benzothiophene ring-B system induced a unique antimitotic bioactivity. The resulting antimitotic agent showed a wide spectrum against multiple cancer cell lines including MDR cells. Based on this finding, a series of new antimitotic flavonoids was designed and synthesized. We have also identified a cellular protein overexpressed in MDR cells as a novel candidate for overcoming MDR tumor using TEDB derivatives.研究課題/領域番号:25670054, 研究期間(年度):2013-04-01 - 2016-03-31出典：研究課題「天然物由来小分子化合物を用いた多剤耐性がん選択性のケミカルバイオロジー」課題番号25670054
（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-25670054/25670054seika/）を加工して作成金沢大学医薬保健研究域薬学系research repor
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
薬理活性4位窒素置換benz[cd]indole化合物群の合成研究
Get PDF研究課題/領域番号:04771872, 研究期間(年度):1992出典：研究課題「薬理活性4位窒素置換benz[cd]indole化合物群の合成研究」課題番号04771872
（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/ja/grant/KAKENHI-PROJECT-04771872/）を加工して作成金沢大学薬学部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
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