1,720,961 research outputs found
OPTIMAL CONCENTRATION OF BASIL LEAF EXTRACT (Ocimum basilicum L.) IN INHIBITING THE GROWTH OF Streptococcus mutans IN VITRO : Konsentrasi Optimal Dari Ekstrak Daun Kemangi (Ocimum Basilicum L.) Dalam Menghambat Pertumbuhan Bakteri Streptococcus Mutans In Vitro
No full textIntroduction: One of flora in the oral cavity is Streptococcus mutans as a cause of dental caries. Various ways can be done to suppress its growth, one of them by using mouthwash which is used contains a lot of chemicals, so an alternative is needed by using herbal ingredients, including basil (Ocimum basilicum L.) leaves that contain essential oils, methyl eugenol, phenols, and flavonoids which are able to work as antibacterial. The purpose of this study was to determine the inhibition and optimal concentration of basil leaf extract on the growth of Streptococcus mutans. Materials and method: The method used agar Kirby Bauer method with seven treatments of leaf extract with concentrations of 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, and methanol solution as control group. The culture medium used was Muller Hinton Blood Agar. Results and discussions: The Kruskall Wallis test showed a significant difference between treatment groups. Mann Whitney U-Test test, found that the control group, basil leaf extract concentrations of 1.5%, 2%, 2.5% and 3% were tested with concentrations of 3.5% and 4% had a significant difference. The test between groups of 3.5% and 4% basil leaf extract did not show a significant difference. Conclusion: this study was that in vitro basil leaf extract with a concentration of 3.5% and 4% had inhibitory power on the growth of Streptococcus mutans and basil leaf extract with a concentration of 3.5% optimally inhibited the growth of Streptococcus mutans in vitro
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
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
Antibacterial Activity of Bidara Arab Leaves (Ziziphus spina-christi L) Extract Against Gram-negative Anaerobic Subgingival Bacteria
No full textBackground: Gram-negative anaerobic subgingival bacteria play an important role in the initiation and progression of periodontitis. The secondary metabolites contained in Bidara Arab leaves (Ziziphus spina-christi L) have potential to be antibacterial and inhibited the growth of pathogenic bacterial. The purposed of this study to evaluated the antibacterial activity of Bidara Leaves extract against gram-negative anaerobic subgingival bacteria. Method: Experimental laboratories using Mueller hinton agar to determine the antibacterial activity of Bidara leaves extract 40% and 60% against Porphyromonas gingivalis, Aggregatibacter ctinomycetemcomitans, and Fusobacterium nucleatum, with a comparison of the negative control group ethanol 96% and tetracycline as positive control. The production of extracts through maseration techniques and the subsequent phytochemical testing through tube reaction test. Result: The results of phytochemical analysis identified the presence of flavonoids, tannins, saponins, steroids. The inhibition test showed that the Bidara leaves extract exhibited strong inhibition and a concentration of 60% was more effective than 40% against Gram-negative anaerobic subgingival bacteria including Porphyromonas gingivalis, Aggregatibacter ctinomycetemcomitans, and Fusobacterium nucleatum. Conclusion: The Bidara Arab leaves (Ziziphus spina-christi L) extract at concentration 60% was more effective than 40% against gram-negative anaerobic bacteri
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
Aesthetic Complex Management of Four Upper Anterior Teeth
No full textIntroduction: Anterior teeth require special attention in terms of aesthetics. Complex aesthetic treatment becomes the main choice in cases of anterior teeth with more than one caries, deformities, malposition and in needs of root canal treatment.
Case: A 49-year-old female patient complained of broken upper right and left front teeth due to impact. Objective examination found that the lingual margins of teeth 11, 12 and 13 appeared reddish and bled easily, composite fillings with secondary caries at 21 dentin depths and 22 pulp depths, chipping at 11, 12 and 22. Percussion of tooth 22 (+), pressure test (-) and CE (+).
Case Treatment: One visit root canal treatment in 22, direct composite veneer in 11, 21, 22 and composite restoration in 12.
Discussions: Complex aesthetic treatment involves more than one anterior tooth that requires root canal treatment as well as correction of shape and position. Determination of shape, tooth proportion, color, position dimension, inclination, smile position and lip line, relationship between teeth, relationship of facial midline to lip midline are required in complex aesthetic treatment. Composite resin is chosen as a restorative material due to aesthetic considerations, faster procedure, low cost, does not take much of healthy tooth structure, easy to be repaired when there is damage and does not damage the opposing teeth. The use of palatal putty index can increase the efficiency of the work and maximize the final result.
Conclusion and Suggestions: Complex aesthetic treatment using direct composite veneer is a fast, low-cost treatment option that can provide good aesthetic results in cases of four malformed and malpositioned upper anterior teeth
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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