1,720,959 research outputs found
The Applications of DNA Barcodes in Variety Identification of Pi-Lou-Chun and Oriental Beauty Tea
No full text茶樹為我國重要之經濟作物，因應各地不同的產製環境而發展出各種特色茶。近年發現有進口低價茶葉冒充或混雜國產特色茶之情況，甚或將進口茶葉冒充本國茶葉參加各特色茶區之比賽，為維護我國各特色茶區之發展，有必要區隔國產與進口茶葉。本研究以碧螺春及東方美人茶為研究對象，以M8R (細胞質DNA)及ITS2F (細胞核內DNA)兩組DNA條碼進行茶園茶樹樣品、市售茶、比賽茶及進口茶葉之品種鑑定。收集自碧螺春主要產區之市售茶及比賽茶均為青心柑仔品種製成，茶園可疑樣品之DNA條碼分析結果顯示尖葉種具有與青心柑仔相同之DNA序列，經ISSR DNA分子標誌分析後亦未發現多型性，另一懷疑為台茶16號之茶樹經DNA條碼分析後推測為台茶14號及台茶17號之雜交實生苗，來自青心柑仔與紅心大冇混植茶園之兩可疑樣品則分別為雜交所得之實生苗及青心柑仔變異種。而在東方美人茶主要產區內，大多數茶園所種植之品種為青心大冇品種，大部分比賽茶也為青心大冇品種所製成，但仍有少數東方美人茶係以台茶12號製成，另外亦發現一個核內DNA序列具有1個SNP變異之青心大冇變異種。DNA序列分析結果亦顯示中國進口之碧螺春係由青心柑仔或台茶12號品種製成，而進口之毛蟹品種則是以青心烏龍品種製成。此外本研究也建立黃柑、柑仔(黃)、紅心柑仔、烏金、武夷及大葉烏龍等茶樹品種之DNA指紋，可供未來品種鑑定之參考。本研究顯示以DNA條碼進行茶葉品種鑑定之效果良好，未來可配合產銷履歷制度進行特色茶葉產品區隔，以增進國產特色茶之發展。Tea (Camellia sinensis) is one of the most important economic crops in Taiwan. Because of different growing and producing environments, each tea production area has its own unique tea. In recent years, some fake or adulterant imported tea varieties were found in the domestic markets or competition tea activities. To maintain the industry of unique tea in Taiwan, it’s necessary to distinguish domestic tea from imported tea. In this study, tea samples of Pi-Lou-Chun and Oriental Beauty Tea were analyzed by using M8R (organelle DNA) and ITS2F (nuclear DNA) DNA barcodes. These samples were collected from main production areas, markets, competition tea activities and China. All tea samples collected from main production areas of Pi-Lou-Chun and markets were verified as the variety Chin-Shin-Gan-Tzy. A mutant with acicular buds was identified with the same DNA sequences and ISSR DNA fingerprints as Chin-Shin-Gan-Tzy. One tea tree of suspected variety TTES No. 16 was identified as natural crossing between TTES No.14 and TTES NO. 17. Two suspected samples from tea garden of mixture planting of Chin-Shin-Gan-Tzy and Horng-Shin-Dah-Pan were a mutant of Chin-Shin-Gan-Tzy and a hybrid of these two varieties, respectively. Most plants grown in the main production areas of Oriental Beauty Tea were variety Chin-Shin-Dah-Pan, and most competition tea samples of Oriental Beauty Tea were identified as variety Chin-Shin-Dah-Pan. But some Oriental Beauty Tea samples were made by variety TTES NO. 12. Besides, a few samples of Chin-Shin-Dah-Pan with one SNP in nuclear DNA sequence were found. Imported tea labeled “Pi-Lou-Chun” was made of Chin-Shin-Gan-Tzy or TTES NO. 12, and imported tea samples of Mau-Hsei were verified to be made of variety Chin-Shin-Oolong. In addition, DNA fingerprints of varieties Hwang-Gan, Gan-Yzy (Yellow), Horng-Shin-Gan-Tzy, Wu-Jin, Wuu-Yi and Dah-Yeh-Oolong were established. This study has shown that DNA barcodes are very useful in variety identification of tea. For enhancing the unique tea industry in Taiwan, DNA barcodes could be applied with traceability system in the future
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
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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