1,720,958 research outputs found
CHARACTERIZATION AND MORPHOLOGICAL TECHNIQUES FOR ORAL BIOFILM VISUALIZATION: STATE OF THE ART
No full textAim: this review analyzes the morphological methods used to
identify microbial species, the adhesion mechanisms involved
in biofilm formation and stability, and the efficacy of microbicidal
agents against pathological biofilms.
Methods: a literature review was performed to examine the
main features of the oral ecosystem and the qualitative and
morphological techniques used for biofilm analysis.
Results: the oral microbiome is essential for oral and systemic
health. Biofilm is a structured microbial community
whose pathological shifts in microbial metabolism can damage
host surfaces. Microscopy remains the primary tool for
morphological biofilm analysis. Stereomicroscopy and Confocal
Laser Scanning Microscopy (CLSM) allow detailed visualization
of structure, microbial distribution, and three-dimensional
architecture. Electron microscopy (SEM and TEM)
enables high-resolution analysis of bacteria, the extracellular
matrix and adhesion mechanisms.
Advanced techniques like STEM, HR-TEM, and correlative
microscopy help evaluate antibacterial strategies by visualizing
biofilm disruption.
Conclusions: microscopy is crucial for understanding biofilm
morphology and improving targeted therapies. Further studies
are needed to investigate advanced techniques and microbiological
and pathological aspects of oral biofilm
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
Real-world dental health of Ukrainian war refugee children and adolescents in Umbria, Italy: preliminary data
Full text linkBackground More than two years of the Russian-Ukrainian war have resulted in widespread human and economic tragedy. This crisis also affects health status, including oral health. Objective To carry out an exploratory analysis on the extent of caries in Ukrainian war refugee children and adolescents, and in addition to determine whether there was a statistically significant association between caries and age, gender, periodontal health status (using the Periodontal Screening and Recording (PSR) index), self-reported socioeconomic status and Italian language speaking skills. Methods This study used a cross-sectional design, was conducted in Perugia, Italy at the University Dental Clinic (COU) between November 2023 and April 2024 and included 50 children and adolescents between 3 and 18 years old (mean age 9.2 SD 4.6) with Ukrainian citizenship who had left their home country due to the war. The visits were conducted in the presence of a cultural mediator. The visits consisted of two parts: the administration of questionnaires on socio-economic status and communication skills, followed by a dental examination. A logistic regression model was used to identify the factors independently associated (age, sex, PSR, socio-economic status and level of communication) with high DMFT/dmft values. Results The refugees' mean DMFT/dmft was 3.5 SD 2.5. The multivariate logistic regression model showed that increased PSR (OR 7.71, 95% CI 1.38-22.94, p = 0.020) and low communication (OR 6.09, 95% CI 1.34-27.69, p = 0.019) were independently associated with the risk of having a DMFT/dmft > 4. Conclusions The study findings were worrying in terms of the prevalence and severity of caries, especially in refugee children with a poor level of integration in the host country. This study with its preliminary data provides a starting point to reflect on the need for specific health policies adapted to a complex type of social vulnerability such as refugee children status
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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