1,720,954 research outputs found
Evaluación del potencial nutracéutico de SESUVIUM PORTULACASTRUM obtenida de la Playa Varadero como aporte a la desnutrición crónica infantil
Get PDFLa desnutrición crónica infantil es un estado patológico que es ocasionado por una incorrecta ingesta de alimentos con nutrientes inadecuados que tiene efectos devastadores tanto en el crecimiento físico como cognitivo de los niños impactando directamente en su calidad de vida. La planta halófita Sesuvium portulacastrum por su alto contenido de metabolitos secundarios y nutrientes se posiciona como una fuente de alimentos funcionales y nutracéuticos. Por esto, se exploró el potencial nutracéutico de las hojas Sesuvium portulacastrum obtenida de tres diferentes puntos de la Playa Varadero como aporte a la desnutrición crónica infantil. Para esto, se identificó la concentración de macronutrientes y micronutrientes mediante espectroscopia de emisión atómica de plasma acoplado inductivamente (ICP-OES). Se determinó metabolitos secundarios a través de un tamizaje fitoquímico. Además, se diseñó un sistema de cultivo hidropónico halófito que cumpla con las condiciones óptimas para el cultivo de Sesuvium portulacastrum en el campus María Auxiliadora de la Universidad Politécnica Salesiana. Los resultados demostraron altos contenidos de micronutrientes (Cu, Fe, Cr y Zn) y de macronutrientes (Na, K, Mg, y Ca). Se determinó la presencia de metabolitos secundarios como alcaloides, flavonoides, cumarinas y terpenoides. Se concluyó que un cultivo hidropónico ideal para el crecimiento de plantas halófitas es aquel de tipo horizontal, con un sustrato hecho a base de estopa de coco, arena de mar y turba, con un perenne contacto con agua salada misma que contiene solución nutritiva de Steiner y oxigenación constante. Todo el contenido de metabolitos secundarios y de nutrientes apuntan a que esta planta halófita se puede posicionar como un alimento nutracéutico que contribuya significativamente a mejorar la salud y bienestar de los niños afectados con desnutrición crónica infantil gracias a sus propiedades bioactivas.Chronic malnutrition in children is a pathological condition caused by an inadequate intake of food with inadequate nutrients that has devastating effects on both the physical and cognitive growth of children, directly impacting their quality of life. The halophyte plant Sesuvium portulacastrum, due to its high content of secondary metabolites and nutrients, is positioned as a source of functional foods and nutraceuticals. For this reason, the nutraceutical potential of Sesuvium portulacastrum leaves obtained from three different points of Varadero Beach was explored as a contribution to chronic child malnutrition. For this, the concentration of macronutrients and micronutrients was identified by inductively coupled plasma atomic emission spectroscopy (ICP-OES). Secondary metabolites were determined through phytochemical screening. In addition, a halophyte hydroponic culture system was designed to meet the optimal conditions for the cultivation of Sesuvium portulacastrum at the Maria Auxiliadora campus of the Salesian Polytechnic University. The results showed high contents of micronutrients (Cu, Fe, Cr and Zn) and macronutrients (Na, K, Mg, and Ca). The presence of secondary metabolites such as alkaloids, flavonoids, coumarins and terpenoids was determined. It was concluded that an ideal hydroponic culture for the growth of halophyte plants is the horizontal type, with a substrate made of coconut tow, sea sand and peat, with a perennial contact with salt water containing Steiner's nutrient solution and constant oxygenation. All the content of secondary metabolites and nutrients suggest that this halophyte plant can be positioned as a nutraceutical food that contributes significantly to improve the health and well-being of children affected with chronic malnutrition thanks to its bioactive properties
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
- …
