1,720,957 research outputs found
Evaluation of antifungal activity of origanum vulgare and rosmarinus officinalis essential oil before and after inclusion in β-cyclodextrine
No full textObjective: The aim of this study is to evaluate and compare the antifungal activity of essential oil of Origanum vulgare and Rosmarinus officinalis collected in north region of Albania, and how is it modified by microencapsulation with β-cyclodextrin (β-CD). Methods: Chemical composition of both isolated essential oils was determined by gas chromatography/mass spectrometry. The disc diffusion method was used to screen the antifungal activities of essential oils, before and after microencapsulation, against following dermatophytes: M. gypseum, M. canis, A. cajetani, T. violaceum, T. mentagrophytes, E. floccosum,T. rubrum, T. tonsurans and phytopatogens B. cinerea and P. oryzae. Results: The major identified compounds for Rosmarinus officinalis and Origanum vulgare essential oils, by GC/MS analyses, were respectively: 1, 8cineol, camphor, verbenone, borneol and carvacrol, thymol for O. vulgare essential oil. Maximum antifungal activity of essential oil of O. vulgare was observed against T. tonsurans, T. violaceum, T. floccosum,T. mentagrophytes. Meanwhile the essential oil of R. officinalis exhibits a moderate antifungal activity against T. violaceum. The essential oils demonstrated higher inhibition zones after microencapsulation in β-cylcodextrine. Conclusion: From the results obtained we can conclude as follows: 1. Antifungal activity of Origanum vulgare essential oil is higher compare to the antifungal activity of Rosmarinus officinalis ones due to high content of carvacrol in Origanum vulgare essential oil. 2. Microencapsulation does not change the antifungal activity of both essential oils; this should consent to achieve the optimal antifungal activity with minimum side effects of essential oil, and improved stability upon storage due to benefits of microencapsulation in β-cyclodextrine. Moreover, after encapsulation improved activity were observed
Herbal Drugs as Novel Antibiotics
No full textThis study is extended in many years, from 2010 in which is investigated the herbal drug biological activity. The evolution of antibiotic-resistant bacteria has been developed very rapidly lately over the world. In this point, there is an urgent need to develop alternative strategies to address this issue. Herbal drugs are a very promising group since they are used since ancients time for their antimicrobial, antifungal and antinflammatory properties. The essential oils obtained from medicinal and aromatic plants by Albanian origin, such as Satureja montana, Thymus vulgaris, Origanum vulgare, Myrtus communis, Rosmarinus officinalis, Thymus capitatus and Salvia officinalis are studied for antibacterial and antifungal properties in this study
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
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