1,720,954 research outputs found
Effect of Changing Coating Process Parameters in the Preparation of Antimicrobial-Coated Silk Sutures: An In Vitro Study
No full textEffect of Changing Coating Process
Parameters in the Preparation of Antimicrobial-Coated
Silk Sutures: An In Vitro Study,is a published article of the textile technology department.,Braided silk sutures were coated using a combination of poly(?-caprolactone) (PCL) and sulfamethoxazole
trimethroprim (SMZ) to investigate their antimicrobial performance. SMZ (2500 ?g/ml) was combined with different PCL
concentrations, i.e., 2.5 %, 5 %, 7.5 %, and 10 % (w/v). Antimicrobial test results showed that SMZ and PCL-treated silk
sutures exhibited increasing antimicrobial efficacy against Gram-negative (Escherichia coli) and -positive bacteria
(Staphylococcus aureus) with increasing PCL concentrations. The tensile and knot strength of sutures coated with 10 % PCL
were significantly higher than those of sutures coated with 7.5 %, 5 %, and 2.5 % PCL. Treatment with PCL exhibited a
positive effect on drug release from the sutures. Significant traits of antibacterial activity were observed up to 4 days after
instalment of 10 % PCL-coated silk sutures. Under a scanning electron microscope, untreated silk sutures showed a surface
heavily coated with bacteria, whereas treated sutures showed a smooth surface without bacteria. The results of this study
indicate that SMZ combined with high concentrations of PCL may afford a suitable antibacterial coating agent for braided
silk sutures
The Antimicrobial Efficacy Study of Pretreated Antimicrobial Silk Suture
No full textThe Antimicrobial Efficacy Study of Pretreated Antimicrobial Silk Suture is a published article of the Textile Technology department.,In recent years many antimicrobial sutures have been developed in a quest to
deal with the problem of surgical site infections in the medical world. This study was
done to find out the effects of pre-treating the braided suture materials before applying
the antibacterial coating agent. 0.1N sodium hydroxide (NaOH) solution was used to pre
treat / pre scour the sutures to remove impurities and also to open the structure of the silk
sutures so as to allow the coating agent to penetrate into the suture structure. A
biodegradable polymer and an antibacterial drug, that is, polycaprolactone (PCL) and
Sulphamethoxazole trimethropm (SMZ) were used as the coating agent. The polymer
PCL was made into a solution of 10% whilst the drug SMZ was made into a solution of
2500 ?g/ml. 5cm pieces of silk braided sutures were first cut aseptically and then washed
in 0.1N NaOH solution and dried. After this pretreatment, they were coated with the
antimicrobial coating agent and then dried. The pretreated sutures were then evaluated
and compared, with non treated sutures acting as the control. Antimicrobial tests were
then carried out to find out the effects of pre-treated and non pre-treated sutures on the
antimicrobial properties of the sutures. Through this study it was found that the pretreated
sutures exerted a better sustained efficacy assay compared to those that are not
pretreated, however mechanical properties were lowered but were still within the required
standards for antimicrobial sutures
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
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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