1,720,974 research outputs found
Association of osteopetrosis and vitamin D-resistant rickets
No full textThe following report concerns a case of malignant osteopetrosis associated with hypocalcemic rickets unresponsive to vitamin D. Parathyroid hormone (PTH) and Calcitonin (CT) secretions were studied in basal conditions and under calcium gluconate infusion, before and after high doses of vitamin D. Basal values (PTH: 690 pg Eq/ml; CT: 560 pg/ml) were found to be much higher than in five control subjects of the same age group, even after vitamin D therapy (PTH: 990 pg Eq/ml; CT:450 pg/ml). Like rickets, PTH and CT secretions do not seem, therefore, to be notably influenced by vitamin D therapy
Calcium, phosphorus and magnesium metabolism and bone mineral mass in Beta-Thalassemia : a preliminary report
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Studio di alcuni parametri del metabolismo minerale in pazienti con fratture dei lunghi segmenti scheletrici
No full textThe aim of this investigation was the study of plasma levels of calcium-regulating hormanes and bone turn-over indices in healing fractures. We observed 14 patients treated with emergency osteosynthesis after fractures (12 males and 2 females, mean age 32,42 +- 3,94 years). Patients with endocrinological and metabolic diseases were not included in the study, as well as patients treated with drugs affecting mineral and bone metabolism. The considered indices were: blood calcium, phosphate, magnesium and alkaline phosphatase (heat-inactivated bone isoenzyme), NH2- and COOH-terminal PTH, calcitonin, 25-OHD3, urinary Ca,P, Mg, and hydroxyproline. The tests were performed 2, 10, 30, 60, and 120 days after operation. We observed as increase in blood Ca but not over normal values and an increased bone turn-over as indicated by high values of alkaline phosphatase and urinary hydroxyproline, as expected. The increase of bone cellular metabolism seems to be substained by an increase in parathyroid hormone levels
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
[Value of determination of exchangeable sodium in the diagnosis and evaluation of therapy in primary hyperaldosteronism]
No full textAppropriate 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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