1,721,122 research outputs found
The influence of surface morphological treatments of ITO on the performances of inkjet printed, enzyme-based biosensors
No full textThe utilization of semiconducting and conducting polymers for the fabrication of computer-assisted printable-on-demand electrodes (the so-called “biopolytronics” concept) is a very interesting field of investigation for the realization of third generation bioelectronic devices such as biosensors, biofuel cells,.... In this line, we studied in the last years fully inkjet printed glucose oxidase (GOD)-based electrode, realized over ITO substrates [L. Setti, A. Fraleoni-Morgera, B. Ballarin, A. Filippini, D. Frascaro, C. Piana, Biosens. Bioel., 2005, 20, 2019; L. Setti, C. Piana, S. Bonazzi, B. Ballarin, D. Frascaro, A. Fraleoni-Morgera, S. Giuliani, Anal. Lett., 2004, 37, 1559]. For enhancing the performances of these devices a deeper understanding of the phenomena of electronic transfer between inorganic electrodes such as ITO, and organic materials able to conduct electrical currents, such as for example PEDOT:PSS, is needed.
In this view, we realized surface modifications of ITO at a nano-scale, and we investigated the effect of such a treatment over the performances of inkjet printed GOD-based electrodes. In particular, investigations over the ITO surface morphology (AFM, white light interferometer, SEM, etc) and electrical characteristics (sheet resistance) have been carried on, and related to the performances of devices fabricated and tested. Together with an overview of the technologies used for the realization of biological and electronic inks, as well as for printing enzyme-based electrodes, are reported
Synthesis of TiO2 rutile nanoparticles by PLA in solution
No full textThis paper describes the synthesis of TiO2 nanoparticles by laser ablation in solution synthesis (Lasis). The laser excimer beam passes through a focusing lens and it is sent to the reaction chamber. The frequency used during the synthesis was 20 Hz, intensity 26 kV The metal ablated by the laser beam undergoes an oxidation process resulting from the reaction with water. We obtain TiO2 nanoparticles with average size of 6.5 nm, crystallized in the rutile structure. The crystallographic and morphological structure was studied by transmission electron microscop
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
Pre-treatment to enhance the energetic yield of winemaking by-products
No full textOn the basis, agro-food wastes can represent a potential energy resource even if the biological transformation to methane is mainly limited to hydrolytic pre-treatment for producing simple sugar to be rapidly fermented. Grape stalks for example have a high percentage
of lignin and cellulose and can’t be used, whitout pretreatment, for an anaerobic digestion process.
Our findings show enzymatic and thermo-mechanical pre-treatments in combined application for optimise hydrolytic mechanism on winemaking wastes which represents 0,9 milion ton/year in Italy.
A screening of specifically industrial enzymatic complex for the hydrolysis lignocellulosic biomass were tested using the principal polysaccharides component of the vegetal cells.
Hydrolysis test are optimized for the different feedstock, in particular grapes stalk and marc from winery industry.
A combination of thermo-mechanical treatment at different temperatures as well enzymatic concentrations from 0,1% to 5% w/w showed an increasing release of simple sugars up to 25% depending to the kind of feedstock.
The optimisation of the operative factors permits to justify an industrial useful of this application in which the sugar concentration has yielded a maximum of 21 gr/L and 30 gr/L with grapes stalk and marc, respectively
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