1,720,958 research outputs found
High concentrations of prostate-specific antigen in urine of women receiving oral contraceptives
No full textProstate-specific antigen synthesis and secretion by human placenta: a physiological kallikrein source during pregnancy.
No full textProstate-specific antigen (PSA), a kallikrein-like serine protease until recently thought to be prostate specific, has been demonstrated in various nonprostatic tissues and body fluids. PSA has been also found in human endometrium and amniotic fluids, even if the significance of this novel expression is unclear. In this study, we have demonstrated by multiple techniques that human placental tissue, obtained at delivery from normal full-term pregnancies, synthesizes and secretes PSA. RT-PCR showed the presence of PSA messenger ribonucleic acid; biochemical, chromatographic, and immunological studies revealed the expression of both free and complexed PSA forms; immunoelectron microscopy indicated the syncytiotrophoblast as the site of PSA synthesis and secretion. Moreover, in vitro experiments demonstrated that PSA production and secretion are up-regulated by 17β-estradiol, a pregnancy-related steroid hormone. These results suggest that human placenta is a source of the PSA present in am..
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
Vaginal natural oxygenation device (VNOD) for concomitant administration of hyaluronic acid and topical hyperbaric oxygen to treat vulvo-vaginal atrophy: a pilot study
No full textOBJECTIVE: This is a pilot study to evaluate the effectiveness of concomitant administration of hyaluronic acid and topical hyperbaric oxygen therapy (THOT) by a specifically designed medical device (vaginal natural oxygenation device, VNOD) in improving the symptomatology of postmenopausal patients with vulvo-vaginal atrophy (VVA).PATIENTS AND METHODS: Women with diagnosis of severe VVA from September 2017 to May 2018 were included. Five biweekly administration of THOT and concomitant of hyaluronic acid were performed with a specifically designed medical device. In each occasion, the intensity of patient's symptoms (well-being such as absence of dyspareunia, vaginal dryness, vulvar and/or vaginal itching; vaginal burning; presence of fluid) was determined with a graduated scale from 1 to 6 and the vaginal elasticity and the vaginal wall epithelium appearance were also determined with a graduated scale from 1 to 5. The change in all parameters from baseline to end of therapy was evaluated.RESULTS: Twenty-five patients were considered for the final analysis. A significant improvement in well-being (0.3 vs. 5.1, p < 0.001). vaginal burning (0.2 vs. 5.1, p < 0.001), presence of fluid (0.6 vs. 4.9, p < 0.001), vaginal epithelium appearance (1.8 vs. 4.7, p < 0.001), and vaginal elasticity (1.1 vs. 3.8, p < 0.001) was observed between the first and the last therapy session. All the patients reported a recovery of their sexuality at the end of the five treatment sessions.CONCLUSIONS: In this pilot study, the use of VNOD seems to be a valid treatment of VVA, resulting in a completely natural type of therapy well accepted by patients with immediate therapeutic effects and without side effects: these findings must be confirmed in a well-designed randomized controlled trial
Studies on amniotic prolactin: Chromatographic pattern and correlation with the lecithin content
No full textWe have measured the concentrations of prolactin and lecithin in the amniotic fluid from 20 normal pregnant women in the 2nd and 3rd trimester. Prolactin is present totally as a low-molecular-weight form, 'little' prolactin, and appears to correlate negatively with lecithin during the 2nd and positively during the 3rd trimester. On the basis of these results and of the information that prolactin is present as high-molecular-weight isohormones in maternal blood, it is argued that amniotic prolactin is synthesized 'in situ' and that different mechanisms are involved in the regulation of prolactin production
Vaginal natural oxygenation device (VNOD) for concomitant administration of hyaluronic acid and topical hyperbaric oxygen to treat vulvo-vaginal atrophy. a pilot study
No full textAbstract
OBJECTIVE:
This is a pilot study to evaluate the effectiveness of concomitant administration of hyaluronic acid and topical hyperbaric oxygen therapy (THOT) by a specifically designed medical device (vaginal natural oxygenation device, VNOD) in improving the symptomatology of postmenopausal patients with vulvo-vaginal atrophy (VVA).
PATIENTS AND METHODS:
Women with diagnosis of severe VVA from September 2017 to May 2018 were included. Five biweekly administration of THOT and concomitant of hyaluronic acid were performed with a specifically designed medical device. In each occasion, the intensity of patient's symptoms (well-being such as absence of dyspareunia, vaginal dryness, vulvar and/or vaginal itching; vaginal burning; presence of fluid) was determined with a graduated scale from 1 to 6 and the vaginal elasticity and the vaginal wall epithelium appearance were also determined with a graduated scale from 1 to 5. The change in all parameters from baseline to end of therapy was evaluated.
RESULTS:
Twenty-five patients were considered for the final analysis. A significant improvement in well-being (0.3 vs. 5.1, p < 0.001), vaginal burning (0.2 vs. 5.1, p < 0.001), presence of fluid (0.6 vs. 4.9, p < 0.001), vaginal epithelium appearance (1.8 vs. 4.7, p < 0.001), and vaginal elasticity (1.1 vs. 3.8, p < 0.001) was observed between the first and the last therapy session. All the patients reported a recovery of their sexuality at the end of the five treatment sessions.
CONCLUSIONS:
In this pilot study, the use of VNOD seems to be a valid treatment of VVA, resulting in a completely natural type of therapy well accepted by patients with immediate therapeutic effects and without side effects; these findings must be confirmed in a well-designed randomized controlled trial
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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