1,720,999 research outputs found
EMERGING ROLE OF NEUROTROPHINS IN CARDIOVASCULAR REGULATION:IMPACT AND CHARACTERIZATION OF GENETIC VARIANT BDNF (VAL66MET) POLYMORPHISM ON THROMBOTIC EVENTS
Full text linkBrain-derived neurotrophic factor (BDNF) is a neurotrophin that plays a key role in neuron plasticity (Donovan, et al., 2000), and vascular development (Kermani, et al., 2007). A single nucleotide polymorphism in the BDNF gene (BDNF Val66Met) has been associated with depression (Ventriglia, et al., 2002) (Momose, et al., 2002) (Sen, et al., 2003) (Neves-Pereira, et al., 2002), and recently, it has also been proposed as genetic risk factor for cardiovascular disease (CVD) (Bozzini, et al., 2009) (Jiang, et al., 2009). Intriguingly, reduced BDNF levels are detected in both depressed patients and in subjects with BDNF Val66Met polymorphism, and seem associated with increased coronary events and mortality in patients affected by acute coronary syndrome (Bozzini, et al., 2009). In this study we have assessed the impact of BDNF Val66Met polymorphism on the levels or activity of haemostatic system in relation to experimentally induced thrombosis.
Humanized Val66Met BDNF homozygote knock-in mice (BDNF Met/Met) have an alterated arterial and venous thrombosis compared to BDNF Val/Val control mice. Thromboelastometry analyses showed that BDNF Met/Met mice present a significant modification both in clot firmness, clot elasticity, and in the clot formation time compared to BDNF Val/Val mice, suggesting alteration in platelet reactivity and fibrinogen, but normal levels of coagulation factors. Importantly, Tissue Factor (TF), the key activator of blood coagulation, was modified in BDNF Met/Met mice. In addition, data obtained by proteomic analysis of the aorta secretome isolated from Val/Val and Met/Met mice, confirmed with different techniques, revealed several differentially expressed proteins involved in the regulation of coagulation and thrombosis in plasma and/or aorta tissue of BDNF Met/Met compared to control mice.
Our results further confirmed the emerging role of neurotrophins in cardiovascular regulation
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
A Real Time Flood Forecasting System Based on Rainfall Thresholds Working on the Arno Watershed: Definition and Reliability Analysis
No full textAnalisi di affidabilitá del sistema di preallerta di piena in tempo reale MIMI per il bacino del fiume Arno
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
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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