1,720,959 research outputs found
[Biochemical markers of bone remodeling in the prevention of postmenopausal osteoporosis].
No full textNormal bone mass is one of the principal factors in the prevention of osteoporosis for women in advanced age. Therefore, it is necessary to have efficacious serum and urinary markers available to screen the bone development and the bone resorption. Even if we are also far from identifying an ideal marker, the measurement of some substances such as pyridinoline (Pyr) and deoxypyridinoline (D-Pyr) seems to be a first progress for efficacious and rather simple techniques
[Estrogen-progestin contraception and biohumoral response of new markers of the atheroma risk. Behavior of lipoprotein(a) and apolipoproteins A and B].
No full textA homogeneous group of 45 patients, aged between 19 and 37 years was considered in relationship to metabolic response during oral contraceptive use. A free endocrinological-metabolic pathology control group, formed by 30 patients, aged between 22 and 35, who were not treated with any therapy in the six months before, was also considered. We also considered any other factors like smoking, height, and weight in all women of our study. Study-trial was comprehensive of a 12 months follow-up, with some periods of study at 0, +6, +12 months. Metabolic responses of lipoprotein(a) and apolipoprotein A and B during the different follow-up steps were determined. Total and fractionated cholesterol and triglycerides were also determined. Positive correlations were shown between Lipo(a) and Apo B and also between total cholesterol and LDL. Negative correlations were shown between Lipo(a) vs HDL and Apo A. Lipoprotein(a) was determined by the ELISA technique and turbidimetric technique. The aim of our study was to verify the importance of the new markers of atheroma risk; even if the oral estrogen-progestin contraception little interferes with this biohumoral marker synthesis, it improves atheroma risk protection through the lipidic metabolism complexity
[Lipoprotein(a) and the cardiovascular risk during estrogen-progestin replacement therapy in postmenopause].
No full textA homogeneous group of 37 patients, aged between 52 and 61 years was considered in relationship to the metabolic response during hormonal replacement therapy (HRT). A free endocrinological-metabolic pathology control group, formed by 40 patients, who were not treated with any therapy, was also considered. Study-trial was comprehensive of a 123 months follow-up, with some periods of study at 0, +6, +12 months. Metabolic responses of lipoprotein(a) and apolipoprotein A and B during the different follow-up steps were determined. Total and fractioned cholesterol and triglycerides were also determined. Significant correlations were shown between Lipo(a) and Apo B and also between Lipo(a) and LDL in both groups considered Lipoprotein(a) was determined by ELISA methodic and turbidimetric methodic. The aim of our study was to verify the importance of the new markers of the atheromatous risk. The reduction of lipoproteins middle value observed in the HRT group shows a little, but however present, estrogens action to the Lipo(a) itself. This fact testifies to the benefit of the use of HRT in post-menopause also as reg ards an evaluated cardiovascular risk inhibition
[Bacterial vaginosis and premature membrane rupture: an open study. Preliminary data].
No full textWe tried to identify a correlation between bacterial vaginosis and PROM with the aim of proposing a future screening for pregnant women at risk for premature rupture of membranes. We made two vaginal bacteriological tests on women pregnant at 24th and 34th week, and we repeated the same test when it proved positive for infection after therapy. We did 375 tests and our study group was composed of 249 pregnant women, aged between 24 and 35. We also evaluated some variable factors as ultrasonographic gestational age redetermination, number pregnancies of oral contraceptives or IUD use, presence of risk factors presence (recurrent abortion, previous PROM, glucose metabolism alteration, immunosuppression, condylomatosis). 171 tests proved positive (total positivity percentage: 47.2\%). The most common micro-organism was Ureaplasma urealyticum (49.1\%) that was related to PROM in 66.7\%. This result contracts with affirmations of some England authors who think that Ureaplasma hasn't an important role in PROM. This fact, if related to the other data we obtained with our study, actually current, shows a strict correlation between PROM and bacterial vaginosis, but also a different distribution of vaginal infections in our country in comparison with English countries
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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