1,721,002 research outputs found
Furan-based polyesters loaded with nisin for sustainable antimicrobial packaging
No full textThis work focuses on the realization of fully bio-based blends from two different furan-based polyesters and natural preservatives, to obtain innovative/active food packaging. As preservative, nisin, a polycyclic antibacterial peptide produced by Lactococcus lactis, was mixed in 2.5 wt% amount, with the homopolymer poly(trimethylene furanoate), PTF, and the copolymer poly(butylene/pentamethylene furanoate), P(BPeF). The mechanical properties of the blends evidenced a modulation for flexibility and toughness, in particular in P(BPeF), owing to the presence of nisin, keeping at the same time the thermal stability, which is a key feature of these polyesters, as well as their thermal transitions.The evaluation of the functional properties highlighted the preservation of excellent gas barrier characteristics of PTF and P(BPeF). Lastly, the addition of nisin allows for the implementation of antibacterial features,absent in the pristine polymers, as the blends showed antimicrobial activity, by disc diffusion assay, against Lactiplantibacillus plantarum and Listeria monocytogenes. PTF containing 2.5% nisin were tested also in ACE juice, pH 4.5, inoculated with Listeria monocytogenes at 10^2 CFU/mL and stored at 4°C. L. monocytogenes growth was checked for 12d. After 8 d, it decreased under the detection limit in the sample with active packaging. In the control sample, the pathogenic species remained constant during the juice shelf-life
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
Reactive blending of poly(propylene 2,5-furandicarboxylate) and poly(propylene cyclohexanedicarboxylate). Bio-based multiblock copolymers for food packaging applications
No full textNew elastomeric biocompatible PLLA-based triblock copolymers for vascular tissue engineering applications
No full textBio-based poly(propylene 2,5-furandicarboxylate/cyclohexanedicarboxylate) multiblock copolymers for food packaging applications
No full textNew nano and microparticles from PLLA-based triblock copolymers for controlled drug release
No full textVariations 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
Pulse waveform and current direction alter network-level TMS-induced functional connectivity: Evidence from TMS-EEG
No full textDataset and analyses for the study 'Pulse waveform and current direction alter network-level TMS-induced functional connectivity: Evidence from TMS-EEG' by Delia Lucarelli, Giacomo Guidali, Roberto Guidotti, Giulia Pieramico, Nadia Bolognini, Gian Luca Romani, Vittorio Pizzella & Laura Marzett
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
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