1,720,960 research outputs found
Near-infrared light-responsive and antibacterial injectable hydrogels with antioxidant activity based on a Dopamine-functionalized Gellan Gum for wound healing
No full textThe development of wound dressings with combined antioxidant, antibacterial and tissue adhesion functions has been a difficult medical task for the treatment of wound infections. We synthetized a dopamine and PEG functionalized Gellan Gum (GG) to produce an injectable hydrogel with radical scavenging activity having both specific and aspecific antibiotic/antimicrobial properties. Using starting GG with different molecular weights, we obtained two derivatives that have been used to prepare the gel precursor dispersion, that undergoes gelation in the presence of colistin and dried microparticles (MPs) functionalized on the surface with polydopamine (pDA). Both were used to dope the hydrogel, increase the radical scavenger activity and impart near-infrared light (NIR) responsiveness. Indeed, with an irradiation of 810 nm, the incorporated microparticles exhibit photothermal transformation properties and improve the release of antibiotics on demand. The combination of photothermal and antibiotic therapy with synergistic antibacterial action acts on Pseudomonas aeruginosa and leads to a bactericidal effect in a few hours, while on Staphylococcus aureus there is an effect of inhibition of growth over time due only to the hyperthermic effect. We believe this study provides a promising method for fabricating a multifunctional injectable hydrogel for the potential treatment of infected skin wounds
Thermosensitive and mucoadhesive Xanthan gum-based hydrogel for local release of anti-Candida peptide
No full textA thermoresponsive and mucoadhesive hydrogel has been developed for the local delivery of a novel anti-
Candida peptide. This antimicrobial peptide was custom-designed and synthesized, utilizing a natural peptide
identified in the hemolymph of the freshwater crayfish Procambarus clarkii as a molecular scaffold. The hydrogel,
fabricated from a xanthan gum/poly-N-isopropylacrylamide graft copolymer, demonstrates temperature-
dependent viscoelastic properties and a pseudoplastic behaviour, making it suitable for potential administra-
tion in various tissues. Moreover, the high stability of the hydrogel (about 9 % weight loss after 24 h of incu-
bation) in physiological fluids as well as its mucoadhesive properties indicate that it could withstand in the
application site long enough to perform its intended function. Furthermore, the good cytocompatibility of the
hydrogel and the peptide’s release profile (approximately 90 % release within the first 24 h), coupled with its
efficacy in inhibiting fungal growth (logarithmic reduction of 1.08 compared to the control), validates the
prospective application of the formulation in managing mucosal and superficial skin C. albicans infections. This
not only addresses concerns related to drug resistance but also establishes the hydrogel as a versatile platform for
advanced drug delivery systems aimed at circumventing systemic administration of antifungal drugs for the
treatment of superficial skin and mucosal candidiasis
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
MULTIFUNCTIONAL POLYSACCHARIDES-DERIVED HYDROGELS WITH ANTIMICROBIAL PROPERTIES FOR INFECTED SKIN WOUND HEALING
Full text linkAppropriate 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
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