1,721,010 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Phytochemical profile, antioxidant and anthelmintic activities of O. gratissimum leaves collected in Kinshasa (D.R. Congo)
No full textExtracts of natural plants contain several chemical groups with various biological activities. This work aimed to evaluate the antioxidant, anthelminthic activities and determining the secondary metabolites, mineral and histological elements of Ocimum gratissimum from Democratic Republic of the Congo used for various culinary and therapeutic purposes. Primo Star 200® microscope was used for microscopic analysis further thin layer chromatography and X-ray fluorescence were used for chemical analysis. Antioxidant and anthelminthic activities were evaluated with DPPH° radical scavenging method and the rate of Benhamia rosea death, respectively. Spiral vessels, group scleritis, sclerotic fiber, pollen seed, stomata, hairs cells were found by Powder microscopic analysis. Secondary metabolites such as polyphenols (tannins, flavonoids, anthocyanins, leuco anthocyanins), alkaloids, steroids, terpenoids and various mineral elements (K, Ca, Cl, P, S, Mg, Na, Zn, Cu, Mn, Fe, etc.) were found in O. gratissimum leaves. Aqueous extract showed a high antioxidant activity with an IC50 of 25.7 ± 1.03 μg/mL. Aqueous extract of O. gratissimum leaves is a good antioxidant and it has an interesting anthelmintic activity
Variations on the Author
No full text“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
No full textWe 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
Traditional uses, Physical properties, Phytochemistry and Bioactivity of Lippia multiflora Moldenke (Verbenaceae): A Mini-review
No full textIn the Democratic Republic of the Congo (DRC), medicinal plants represent the main product for both urban and rural populations for their health care needs due to the high costs of conventional medicine. These plant species contain bioactive compounds also called phytochemicals that are capable of modulating metabolic processes and resulting in the promotion of better health. In the present paper, the aims were to give updated inforÂmation on the physical properties, phytochemistry and pharmacological activities of L. multiflora, medicinal plant in Republic Democratic of the Congo (DR. Congo). A literature search of this specie was conducted to obtain information about the nutritional value, phytochemistry and biological activities from various electronic databases (PubMed, PubMed Central, Science Direct, Google scholar and Sci-hub). The chemical structures of L. multiflora naturally occurring compounds were drawn using ChemBioDraw Ultra 12.0 software package. In this study, the bibliographic references were using bibliographic software Mendeley. L. multiflora Moldenke is a tropical to subtropical herbaceous aromatic plant widely distributed in West and Central Tropical Africa. It has been traditionally used in ethnomedecine against various disorders. It has been reported that the essential oil composition of L. multiflora from some locations were characterized by high terpenoids content, in particular: 1,8-cineole, linalool, geranial and neral, ipsdienone and (Z)- and (E)-ocimenone, thymol and thymyl acetate, p-cymene, sabinene, α-terpineol, α-phellandrene, myrcene and epoxymyrcene, myrtenol, limonene, (E)- and (Z)-tagetone and ipsenone, nerolidol, geraniol, γ-terpinene, (E)-caryophyllene, and β-farnesene). Many study reported that the plant possess various biological properties like anti-hypotensive, anti-inflammatory, anti-analgesic, anti-pyretic, anti-malaria, anti-oxydant, anti-microbial activities. The present review can therefore help inform future scientific research towards the development of novel drugs of relevance from L. multiflora for the improvement of human health and wellbeing
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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