1,721,024 research outputs found
Applicazione degli enzimi nella tintura della lana
Full text linkIn questo lavoro è stata studiata la possibilità di ridurre la temperatura di tintura convenzionale della lana mediante l’impiego di enzimi proteolitici. Differenti proteasi di origine batterica sono state testate al fine di migliorare l’accessibilità del colorante alla fibra anche a basse temperature. Per ogni tintura sono state determinate le curve di esaurimento del colorante nel bagno di tintura.
I campioni tinti sono stati sottoposti ad una valutazione di danneggiamento mediante osservazione al microscopio elettronico a scansione e a prove dinamometriche per valutare la perdita di carico di rottura ed allungamento. Inoltre, i campioni tinti sono stati sottoposti a prove di solidità ad umido e alla luce, parametro molto importante perché legato alla qualità del materiale ottenuto
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
Application of enzymes in wool dyeing
No full textThe application of enzymes in wool dyeing process is an important goal of research in order to reduce the environmental impact and costs of this fundamental finishing process of wool. This work has focused on the possibility of reducing the temperature of conventional dyeing, using an enzymatic pretreatment. Proteolytic enzymes belonging to hydrolase class were used to improve the diffusion of the dye into the fibers at lower temperatures than traditional method, with or without auxiliary agents. Exhaustion curves of the dye bath apparent activation energy values and absorption rate constants were determined. The protection of wool fiber properties during the treatments has been investigated. In order to evaluate a possible fiber damage, the dyed samples were observed by scanning electron microscopy (SEM) and at the same time the loss of tensile strength and elongation were determined. The attack degree of the enzyme was controlled by SDS-Page analysis. In addition, colour fastness to domestic laundering, artificial light, rubbing and perspiration were carried out. These are very
important parameters related to the quality of the material produced. The results of this study show the possibility, thanks to the use of the enzyme investigated, to obtain an homogeneous and strenght dyeing, on fibers maintaining the same mechanical properties, already
working at 85°C, a temperature process clearly under 98°C currently used in industry
Process Optimization and Industrial Scale-Up of Chitosan Based Anti-Felting Treatments of Wool
No full textDispelling 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
Lenograstim and filgrastim in the febrile neutropenia prophylaxis of hospitalized patients: efficacy and cost of the prophylaxis in a retrospective survey [Corrigendum]
No full textInnocenti R, Rigacci L, Restelli U, et al J Blood Med. 2019;10:21–27. On page 24, Figure 2, the key for the figure was incorrect. Read the original articl
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