1,720,981 research outputs found
Genotoxicity of trophosphamide in mouse germ cells: assessment of micronuclei in spermatids and chromosome aberrations in one-cell zygotes.
No full text
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
Knockout mice carrying a deletion of the mental retardation gene Gdi1 show impaired associative memory and altered social behavior
No full textA novel peroxisome proliferator-activated receptor responsive element-luciferase reporter mouse reveals gender specificity of peroxisome proliferator-activated receptor activity in liver
No full textWe report here the finding of a new pharmacological activity of a well known antagonist of peroxisome proliferator-activated receptors (PPARs). PPARs belong to the family of nuclear receptors playing a relevant role in mammalian physiology and are currently believed to represent a major target for the development of innovative drugs for metabolic and inflammatory diseases. In the present study, the application of reporter animal technology was instrumental to obtain the global pharmacological profiling indispensable to unraveling 3-(1-(4-chlorobenzyl)-3-t-butylthio-5-isopropylindol-2-yl)-2,2-dimethylpropanoic acid (MK-886)-selective PPAR modulator (SPPARM) activity not underlined by previous traditional, cell-based studies. The results of this study, demonstrating the usefulness of reporter mice, may open new avenues for the development of innovative drugs for cardiovascular, endocrine, neural, and skeletal systems characterized by limited side effects
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
Transgenic animal for screening of compounds that modulate cell proliferation, and its use in the pharmaceutical field
No full textThe present invention relates to a transgenic non-human mammalian animal whose genome incorporates a biosensor of the activity of modulators of cell proliferation consisting of a DNA sequence that comprises the luciferase reporter transgene ligated downstream of a promoter sequence of the CYCB2 gene, this sequence promoter/reporter being flanked by HS4 insulator sequences at each of its 3′ and 5′ sides.
The transgenic animal is proposed for the screening of compounds with pharmacologically relevant activities.
The invention provides for a further use of the animal line for the study and toxicological evaluation of compounds with tumorigenic activity, and also for the study and evaluation of compounds with chemopreventive anti-cancer activity
Animale transgenico per lo screening di composti che modulano la proliferazione cellulare, ed uso in campo farmaceutico
No full textLa presente invenzione ha per oggetto un animale mammifero transgenico non umano nel cui genoma è incorporata, quale biosensore dell’attività di modulatori della proliferazione cellulare, una cassetta del transgene reporter luciferasi, caratterizzato dal fatto che detta cassetta comprende sequenze isolatrici HS4 fiancheggianti detto transgene reporter luciferasi ligato al promotore CYCB2.
L’animale transgenico è proposto per lo screening di composti dotati di attività di interesse farmacologico.
L’invenzione prevede un ulteriore uso dell’animale per lo studio e la valutazione tossicologica di composti dotati di attività tumorigenica
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
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