1,720,978 research outputs found
Herbal Principles in Cosmetics: Properties and Mechanisms of Action
No full textInterest in the molecular and mechanistic aspects of cosmetic research has grown exponentially during the past decade. Herbal Principles in Cosmetics: Properties and Mechanisms of Action critically examines the botanical, ethnopharmacological, phytochemical, and molecular aspects of botanical active ingredients used in cosmetics. Along with dermatological and cosmetic uses, the book also explores the toxicological aspects of these natural ingredients, maintaining a balanced view that carefully dissects the hype from the solid science. Contains Comprehensive Monographs of Herbs Useful for Skin Care & Diseases Authored by a panel of experts in cell physiology, phytochemistry, ethnopharmacology, applied botany, ethnobotany, and cosmetic science, the book begins with background in skin anatomy and physiology and also the classification, mechanisms of action, and application of herbal compounds. It provides monographs complete with therapeutic properties, specific action and dermatologic properties, toxicities, pictures, and references. The book also addresses the complexities of green biodiversity, including not only higher plants, but also mushrooms, algae, lichens, and bacteria – each chosen for their importance in traditional use, potential for innovation, or recent introduction to market. Includes a Vivid Color Insert with Photographs of Botanical Species Herbal Principles in Cosmetics: Properties and Mechanisms of Action is one of the few books devoted to the mechanisms of action of herbal compounds based on scientific analysis, making it an exceptionally valuable reference for pharmacologists, natural product chemists, skin physiologists, and dermatologists
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
Stevioside content and morphological variability in a population of Stevia rebaudiana (Bertoni) Bertoni from Paraguay
No full textThe leaf content of the sweetener stevioside was investigated with regard to the morphological characteristic of plant of Stevia rebaudiana (Bertoni)Bertoni grown in one of the most productive areas of Paraguay. The HPLC quantitative determination of stevioside was carried out on dried leaves of 13 morphologically different types of plants. The average levels of stevioside in the dried leaves varied from 102.3 to 134.6 g/kg. This variability (about 30% in respect to the minimum value), related to the ratio of the weight of the leaf to that of the whole aerial part, has furnished the first useful information for purposes of asssociating the types of growth habits with stevioside output
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