1,720,962 research outputs found
BIOLOGICAL EVALUATION OF 1-(4-(HYDROXY(1-OXO-1,3-DIHYDRO-2H-INDEN-2-YLI-DENE)METHYL)PHENYL)-3-PHENYLUREA DERIVATIVES: ANTICHOLINERGICS AND ANTIEPILEPTIC POTENTIALS
No full textIn this work, a class of phenylurea compounds containing 2-benzoylindan-1-one molecules 3a-3j was designed and synthesized from the reaction of phenylurea-substituted acetophenone compounds with phthalaldehyde molecule under mild action situations in good yields. The inhibitory effect of these compounds on some metabolic enzymes was examined and compared with a standard compound. IC50 values were obtained from the phenylurea-Induced Activity (%)-[phenylurea compounds] graph and from the Lineweaver-Burk graph. According to the results, the IC50 values of these molecules were in the range 18.23-63.01 nM for hCA I, while the mean K-i values were in the range 7.79 +/- 0.94-122.64 +/- 32.15 nM for this enzyme. The results obtained are expected to make an important contribution to drug design and pharmacological applications. Additionally, these compounds demonstrated well inhibitory effects against acetylcholineesterase (AChE) enzyme. Finally, the K-i values of hCA II were in the range 15.09 +/- 4.48-65.72 +/- 6.64 nM and 1.54 +/- 0.21-22.44 3.83 nM against AChE, respectively
ANTIDIABETIC PROPERTIES OF QUEBECOL AS NATURAL PHENOLIC COMPOUND: alpha -GLYCOSIDASE AND alpha -AMYLASE METABOLIC ENZYMES INHIBITION PROPERTIES
No full textThis study aims to examine the inhibitory effect of Quebecol on alpha-glycosidase and alpha-amylase enzyme activities in comparison with acarbose as a standard. IC50 amounts were obtained by using the Quebecol-Induced Activity (%) - [Quebecol] graph and the Lineweaver-Burk graph. The IC50 values obtained with Quebecol were 28.56 nM for alpha-glycosidase and 211.82 nM for alpha-amylase, while the mean K-i value was 8.04 nM for alpha-glycosidase. The results of our study are expected to contribute to pharmaceutical research and pharmacological applications by providing insight into the biological effects of Quebecol
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
Investigation of Antiepileptic and Anticancer Properties of Some Plant Species Traditionally Used in Turkey
No full textThe study investigated the antiepileptic and anticancer properties of water and ethanol extracts from plant species traditionally used in Turkey, including Centaurea solstitialis subsp. solstitialis (CSS), Tragopogon reticulatus (TR), Erodium cicutarium subsp. cicutarium (ECC), Alyssum alyssoides (AA) and Leontice leontopetalum subsp. leontopetalum (LLL) using apoptosis and cell cycle studies. In the investigation of the antiepileptic properties of plant extracts, the effects on the activities of carbonic anhydrase I and II isoenzymes were measured spectrophotometrically. In anticancer studies, all extracts were applied to human stomach cancer cell line (AGS), human breast cancer cell line (MCF7) and rat glioma cell line (C6) and their cytotoxicity in healthy mouse fibroblast cell line (L929) was compared using the MTT method. All extracts of ECC inhibited carbonic anhydrase I and II isoenzymes at lower concentrations than the standard substance. However, aqueous extracts of all plants had a highly toxic effect on rat glioma cell line (C6), without damaging healthy cells. © 2024, Colegio de Farmaceuticos de la Provincia de Buenos Aires. All rights reserved
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
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