1,720,956 research outputs found
Endocervical adenocarcinoma. Immunohistochemical characterization
No full textThe presence of cytokeratins, IgA, alphafetoprotein (AFP), beta-Human Chorionic Gonadotropin (HCG), Carcinoembryonic antigen (CEA) and Epithelial Membrane Antigen (EMA) were immunohistochemically researched with a PAP method in 19 cases of endocervical adenocarcinoma. AFP and HCG were always absent, while the low and median molecular weight cytokeratins were present in 18 case (95%). These findings confirm the hypothesis of the tumoral histogenesis from the reserve cell of the endocervical epithelium. In 11 case (60%) there was a strong positivity of IgA in the lymphocytes surrounding the tumor nests, in the neoplastic cells and in the endoglandular secretion: this may represent a sign of an immune response of the patients to the tumoral antigens. CEA was present in 8 cases and EMA in 12 cases, with a unique expression: CEA positive cases showed no evidence of EMA and case with EMA positive cells were negative for the presence of CEA. Only in one case CEA and EMA were contemporaneously present. The possible interpretation of these findings is discussed
L’importazione di rane eduli attraverso i porti di Bari ed Ancona nel quadriennio ‘95-’98
No full textEndocervical adenocarcinoma. Clinico-pathologic and histochemical study of 29 cases.
No full textTwenty-nine women were treated for endocervical adenocarcinoma in the University of Bari in the years 1975-1981. The histological type was "endocervical" or "mucinous" in 12 patients (41.4%), "endometrioid" in 12 (41.4%), "clear cell" in 2 (6.9%), "adenosquamous" in 2 (6.9%), and "serous" or "papillary" in 1. Foci of papillary and endometrioid metaplasia were present in 2 adenocarcinomas of endocervical type. The following histochemical methods were used: PAS reaction, PAS reaction with diastase predigestion, Bleu Alcian at pH 2.5 and pH 1, mucicarmine, Toluidine Bleu at 0.3%. The "endocervical" type adenocarcinoma showed mucicarmine positive and PAS positive, diastase resistant material in the whole cytoplasm. This material was not metachromatic and Bleu Alcian positive only in the well differentiated forms. In the "endometrial" adenocarcinoma only in the apex of the glandular cells was PAS positive diastase resistant, Alcian and mucicarmine positive. "Clear cell" and "adenosquamous" carcinomas showed only few cytoplasmatic PAS positive, diastase sensitive granules (= glycogen). No positivity was present in the "papillary" or "serous" carcinomas. Our results permit us to unify the histological and the histochemical patterns of the cervical adenocarcinomas and those of the similar forms of the endometrium and of the ovary, and stress the common müllerian origin of these neoplasms
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
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