1,722,065 research outputs found
Agronomic Uses of Hydrolysable Tannins from Sweet Chestnut (Castanea sativa Mill.): Present Status and Perspectives.
No full textHydrolysable tannins (HTs), water-extracted from sweet chestnut wood (CHW) before it’s used for medium fibreboard manufacturing, and membrane concentrated, have several remarkable effects as antioxidant, antimicrobial, and metal complexing agents. The AA have investigated, developed and patented some innovative uses in agriculture, as Nitrogen release stabilizer, Iron complexing agent, and to increase plant resistance to gall nematodes. Extract fractioning to produce more use-oriented fractions is under stud
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
Glucose 6-phosphate stimulation of MgATP-dependent Ca2+ uptake by rat kidney microsomes
No full text(1) The features of MgATP-dependent Ca2+ accumulation under stimulation with glucose 6-phosphate were studied in rat kidney microsomes. (2) ca2+ accumulated in the presence of MgATP alone does not exceed approx. 2 nmol/mg protein. (3) Glucose 6-phosphate markedly stimulates ca2+ accumulation, up to steady-state levels approx. 15-fold higher than in its absence. (4) The hydrolysis of glucose 6-phosphate by glucose-6-phosphate is essential for the stimulation, as shown by inhibiting the glucose 6-phosphate hydrolysis with adequate concentration of vanadate. Inorganic phospate is accumulated in microsomal vesicles during glucose 6-phosphate-stimulated ca2+ uptake in equimolar amounts with respects to ca2+. (5) Increasing concentrations of glucose 6-phosphate result in increasing stimulations of ca2+ uptake, until a maximal ca2+-loading capacity of approx. 27 nmol/mg microsomal protein is reached. It is suggested that the enlargement of the kidney microsomal ca2+ pool induced by glucose 6-phosphate (an important metabolite in kidney) might play a role in the regulation of ca2+ homeostatis in kidney tubular cells. © 1990
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
Parametric Design for Online User Customization of 3D Printed Assistive Technology for Rheumatic Diseases
Full text linkNew spaces for the co-creation of Assistive devices have been increasing according to the current lack in specific products for everyday user needs satisfaction. Moreover, Open Innovation is gradually increasing the user role in product development thanks to new digital technologies spread. Nevertheless, the knowledge and the affordance of this bottom-up solutions is still limited amongst the potential users. The aim of this work is to show and investigate one application of the Virtual Reality related to Assistive Technology customization, as well as the customization process for the user. Starting from a Co-design approach, variables for customization were detected on specifically co-created products for users with rheumatic diseases. By means of specific 3D modeling tools and an online platform, an Open Source online configurator was then developed for the customization of these products. In this way, customized STL files of the objects can be downloaded and created by using low cost Additive Manufacturing technologies. Consequently, affordable Assistive products for specific needs can be easily spread, increasing the users quality of life
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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