1,720,953 research outputs found
Investigating the use of netting structures as conditions suitable for off-season production of Moringa oleifera in South Africa
Full text linkThesis (M.Sc. (Agricultural Management, Plant production)) -- University of Limpopo, 2025Moringa oleifera, part of the Moringaceae family, is a subtropical plant renowned for its medicinal properties. Its leaves are often used as leafy vegetables or as primary ingredients in green smoothies. However, Moringa oleifera is highly sensitive to cold
temperatures, which can severely hinder its growth and yield. The enhancement and
assessment of growth, yield, and phytochemical composition of Moringa oleifera using
Coolaroo frost cloth and a 40% shade net has not been previously documented. The
aim of this study was to generate scientific information regarding the effects of the application of a white Coolaroo frost cloth and a white 40% shade nets with closed sides, top cover, closed sides and top, to protect Moringa oleifera during the winter season. The objectives of this study were, (1) to investigate the effect of a 40% shade net and Coolaroo Frost Cloth, with closed sides, top cover, closed sides and top, on the growth and yield attributes, and (2) phytochemical profiling of Moringa oleifera during winter. Following a randomized complete block design (RCBD), Moringa oleifera seedlings were transplanted onto plots covered with 40% shade net and established Coolaroo frost cloth with closed sides, top cover, and closed top sides. This process was carried out for 120 days, with three replications and six plants per replicate. Data were subjected to statistical analysis using GenStat 18th version statistical package (VSN International, Hempstead, UK). Mean separation for significant (p≤ 0.05) treatments were achieved using Tukey’s Honestly Significant Difference (HSD). The growth parameters, including plant height, stem diameter, and root length, were measured weekly until the experiment was completed. Yield parameters including plant biomass and number of leaves were recorded at harvest.
After collection, the leaves, roots, and twigs were analyzed for their phytochemical composition. The growth and yield parameters of Moringa oleifera were significantly
influenced (p≤ 0.05) by the Coolaroo frost cloth and the 40% shade net. At termination
(120 days after transplanting), the Coolaroo frost cloth with closed sides and top had
significantly increased the stem diameter, plant height, biomass production, root length
and number of leaves. Untargeted metabolite profiling of the leaves, twigs, and roots
was conducted using UPLC-MS to evaluate the effects of shading on secondary metabolite production, including phenolic compounds, flavonoids, and glycosides.
Chemometric analysis of the UPLC-MS data revealed distinct effects of shading on
different plant tissues. While the root metabolites showed no significant variation
across shading treatments, the twigs and leaves exhibited pronounced differences.
Twigs grown under 40% shade net and Coolaroo frost cloth with closed sides retained
higher concentrations of key flavonoids such as quercetin 3-galactoside, rutin, and astragalin 7-rhamnoside. The leaves formed distinct clusters based on metabolite
composition, with shading structures, especially the 40% shade net with closed top and sides, enhancing the accumulation of important phytochemicals like quecetrin and kaempferol derivatives. Overall, the study concludes that the use of Coolaroo frost
cloth and shade nets provides a practical and cost-effective method for protecting
Moringa oleifera from cold stress. These shading techniques not only improve plant
growth and biomass yield but also enhance the phytochemical content, making the
plant more valuable nutritionally and medicinally. The findings offer a sustainable solution for year-round Moringa cultivation in cold-prone regions, contributing to food
security and agricultural sustainability.DS
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
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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